[424B5] Robin Energy Ltd. Prospectus Supplement (Debt Securities)

Rhea-AI Filing Summary

Robin Energy Ltd (NASDAQ: RBNE) has announced a direct offering of 1,020,000 common shares to institutional investors at $3.50 per share, targeting gross proceeds of $3.57 million. The offering price represents a significant discount from the June 24, 2025 closing price of $4.85.

Key offering details:

• Maxim Group LLC serving as exclusive Placement Agent, receiving 7% fee ($249,900)
• Net proceeds before expenses estimated at $3.32 million
• Company's public float valued at $51.5 million based on 3,678,326 non-affiliate shares
• Subject to Form F-3 limitations, cannot exceed one-third of public float in 12-month period

The offering is expected to close around June 25, 2025, subject to customary conditions. This follows $13.59 million in securities sold under Form F-3 in the past 12 months. The filing notes significant risk factors, including impacts from Toro Corp spin-off, market volatility, and geopolitical concerns affecting shipping operations.

Positive

• Raising $3.57M through offering of 1.02M common shares to institutional investors
• Secured Maxim Group LLC as placement agent, indicating professional institutional support

Negative

• Significant discount offering at $3.50 per share, 27.8% below recent closing price of $4.85
• Share price has declined substantially from $14.00 in June 2025 to $4.85, indicating negative momentum
• Public float remains below $75M, limiting future financing flexibility
• Dilutive impact on existing shareholders with 1.02M new shares being issued

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Filed Pursuant to Rule 424(b)(5)

Registration No. 333-286726

PROSPECTUS SUPPLEMENT

(To Prospectus dated April 28, 2025)

1,020,000 Common Shares

Robin Energy Ltd.

We are offering 1,020,000 of our common shares, par value $0.001 per share, directly to a number of institutional investors, or the Investors, pursuant to this prospectus supplement and the accompanying base prospectus. The offering price of the shares is $3.50 per share.

Our common shares are listed on The Nasdaq Capital Market, or Nasdaq, under the symbol “RBNE”. On June 24, 2025, the closing price for our common shares as reported on the Nasdaq was $4.85 per share. The aggregate market value of our outstanding common shares held by non-affiliates on June 20, 2025 was $51,496,564 based on 3,678,326 common shares issued and outstanding held by non-affiliates and a per share price of $14.00 based on the closing sale price of our common shares on June 13, 2025 as reported by Nasdaq. Pursuant to General Instruction I.B.5 of Form F-3, in no event will we sell our securities in a public primary offering with a value exceeding more than one-third of our public float in any 12-month period so long as our public float remains below $75 million. During the 12 calendar months prior to and including the date of this prospectus, we have sold $13,587,000 in securities pursuant to General Instruction I.B.5 of Form F-3.

Investing in our common shares involves a high degree of risk and uncertainty. See “Risk Factors” beginning on page S-7 of this prospectus supplement, and page 8 of the accompanying base prospectus, and in our annual report on Form 20-F for the fiscal year ended on December 31, 2024, filed with the U.S. Securities and Exchange Commission, or the Commission, on April 15, 2025, or our “Annual Report” which is incorporated by reference herein, to read about the risks you should consider before purchasing our common shares.

We have retained Maxim Group LLC (whom we refer to herein as the Placement Agent) as our exclusive Placement Agent to use its reasonable best efforts to solicit offers to purchase our common shares in this offering. The Placement Agent is not selling any of our common shares pursuant to this prospectus supplement or the accompanying base prospectus. We expect that delivery of our common shares being offered pursuant to this prospectus supplement will be made to the Investors in the offering on or about June 25, 2025, subject to customary closing conditions.

			Per Share			Total
Public offering price			$3.50			$3,570,000.00
Placement agent fees(1)			$0.245			$​249,900.00
Proceeds to the Company before expenses			$3.255			$3,320,100.00

(1)
We have agreed to pay the Placement Agent a cash fee of 7.0%. See “Plan of Distribution” beginning on page S-14 of this prospectus supplement for additional disclosure regarding Placement Agent fees and estimated offering expenses.

None of the Commission, any state securities commission, or any other regulatory body has approved or disapproved of these securities or passed on the adequacy or accuracy of this prospectus supplement or the accompanying base prospectus. Any representation to the contrary is a criminal offense.

Sole Placement Agent

Maxim Group LLC

The date of this prospectus supplement is June 24, 2025.

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PROSPECTUS SUMMARY

			Page
ABOUT THIS PROSPECTUS SUPPLEMENT			S-1
CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS			S-2
ENFORCEABILITY OF CIVIL LIABILITIES			S-4
PROSPECTUS SUPPLEMENT SUMMARY			S-5
THE OFFERING			S-6
RISK FACTORS			S-7
USE OF PROCEEDS			S-10
CAPITALIZATION			S-11
DILUTION			S-12
DESCRIPTION OF SECURITIES WE ARE OFFERING			S-13
PLAN OF DISTRIBUTION			S-14
LEGAL MATTERS			S-16
WHERE YOU CAN FIND ADDITIONAL INFORMATION			S-16
INFORMATION INCORPORATED BY REFERENCE			S-17

BASE PROSPECTUS

ABOUT THIS PROSPECTUS			1
CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS			2
ROBIN ENERGY LTD.			5
WHERE YOU CAN FIND MORE INFORMATION			6
INCORPORATION BY REFERENCE			7
RISK FACTORS			8
USE OF PROCEEDS			9
CAPITALIZATION			10
DESCRIPTION OF CAPITAL STOCK			11
DESCRIPTION OF DEBT SECURITIES			12
DESCRIPTION OF WARRANTS			14
DESCRIPTION OF PURCHASE CONTRACTS			15
DESCRIPTION OF RIGHTS			16
DESCRIPTION OF UNITS			17
PLAN OF DISTRIBUTION			18
TAX CONSIDERATIONS			20
EXPENSES			21
VALIDITY OF SECURITIES			22
EXPERTS			22
ENFORCEABILITY OF CERTAIN CIVIL LIABILITIES			23

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ABOUT THIS PROSPECTUS SUPPLEMENT

This prospectus supplement and the accompanying base prospectus are part of a registration statement that we filed with the Commission, utilizing a “shelf” registration process.

This document is in two parts. The first part is this prospectus supplement, which describes the specific terms of this offering described herein and the securities offered hereby, and also adds to and updates information contained in the accompanying base prospectus and the documents incorporated by reference into this prospectus supplement and the accompanying base prospectus.

The second part, the base prospectus, gives more general information about securities we may offer from time to time, some of which do not apply to this offering. Generally, when we refer only to the prospectus, we are referring to both parts combined, and when we refer to the accompanying base prospectus, we are referring to the base prospectus.

If the description of this offering varies between this prospectus supplement and the accompanying base prospectus, you should rely on the information contained in this prospectus supplement. This prospectus supplement, the accompanying base prospectus and the documents incorporated into each by reference include important information about us, our common shares being offered and other information you should know before investing. You should read this prospectus supplement and the accompanying base prospectus together with the additional information described under the heading “Where You Can Find Additional Information” before investing in our common shares.

We have authorized only the information contained or incorporated by reference in this prospectus supplement, the accompanying base prospectus, and any free writing prospectus prepared by or on behalf of us or to which we have referred you. We have not, and the Placement Agent has not, authorized anyone to provide you with information that is different. We and the Placement Agent take no responsibility for, and can provide no assurance as to the reliability of, any information that others may give you. If anyone provides you with different or inconsistent information, you should not rely on it. We are offering to sell our common shares only in jurisdictions where offers and sales are permitted. The information contained in or incorporated by reference in the prospectus is accurate only as of the date such information was issued, regardless of the time of delivery of the prospectus or the date of any sale of our common shares.

Unless otherwise indicated, all references to “dollars” and “$” in this prospectus supplement are to, and amounts presented in, United States dollars and financial information presented in this prospectus supplement that is derived from financial statements incorporated by reference is prepared in accordance with accounting principles generally accepted in the United States, or U.S. GAAP.

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

Matters discussed in this prospectus supplement may constitute forward-looking statements. The Private Securities Litigation Reform Act of 1995, or the PSLRA, provides safe harbor protections for forward-looking statements in order to encourage companies to provide prospective information about their business. Forward-looking statements include statements concerning plans, objectives, goals, strategies, future events or performance, and underlying assumptions and other statements, which are statements other than statements of historical facts.

Robin Energy Ltd. desires to take advantage of the safe harbor provisions of the PSLRA and is including this cautionary statement in connection with this safe harbor legislation. This prospectus supplement and any other written or oral statements made by us or on our behalf may include forward-looking statements, which reflect our current views with respect to future events and financial performance, and are not intended to give any assurance as to future results. When used in this prospectus supplement, statements that are predictive in nature, that depend upon or refer to future events or conditions, or that include words such as “anticipate”, “believe”, “expect”, “intend”, “estimate”, “target”, “forecast”, “project”, “plan”, “potential”, “continue”, “possible”, “likely”, “may”, “could”, “should”, and similar expressions, terms, or phrases may identify forward-looking statements.

The forward-looking statements in this prospectus supplement are based upon various assumptions, many of which are based, in turn, upon further assumptions, including without limitation, management’s examination of historical operating trends, data contained in our records and other data available from third parties. Although we believe that these assumptions were reasonable when made, because these assumptions are inherently subject to significant uncertainties and contingencies that are difficult or impossible to predict and are beyond our control, we cannot assure you that we will achieve or accomplish these expectations, beliefs or projections. We undertake no obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise.

In addition to these assumptions and matters discussed elsewhere herein and in the documents incorporated by reference herein, important factors that, in our view, could cause actual results to differ materially from those discussed in the forward-looking statements include the following:

• the effects of our spin off from Toro Corp, or the Spin Off.;

• our business strategy, expected capital spending and other plans and objectives for future operations, including our ability to expand our business as a new entrant to the product tanker shipping industry;

• market conditions and trends, including volatility and cyclicality in charter rates, factors affecting supply and demand for vessels such as fluctuations in demand for and the price of the products we transport, fluctuating vessel values, changes in worldwide fleet capacity, opportunities for the profitable operations of vessels in the segment of the shipping industry in which we operate and global economic and financial conditions, including interest rates, inflation and the growth rates of world economies;

• our ability to realize the expected benefits of any vessel acquisitions or sales, and the effects of any change in our fleet’s size or composition, increased transaction costs and other adverse effects (such as lost profit) due to any failure to consummate any sale of our vessel, on our future financial condition, operating results, future revenues and expenses, future liquidity and the adequacy of cash flows from our operations;

• our relationships with our current and future service providers and customers, including the ongoing performance of their obligations, dependence on their expertise, compliance with applicable laws, and any impacts on our reputation due to our association with them;

• the availability of debt or equity financing on acceptable terms and our ability to comply with the covenants in agreements relating thereto, in particular due to economic, financial or operational reasons;

• our continued ability to enter into time charters, voyage charters or pool arrangements with existing and new customers and pool operators, and to re-charter our vessel upon the expiry of the existing pool agreement;

• any failure by our contractual counterparties to meet their contractual obligations;

• changes in our operating and capitalized expenses, including bunker prices, dry-docking, insurance costs, costs associated with regulatory compliance and costs associated with climate change;

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• our ability to fund future capital expenditures and investments in the refurbishment of our vessel (including the amount and nature thereof and the timing of completion thereof, the delivery and commencement of operations dates, expected downtime and lost revenue);

• instances of off-hire;

• fluctuations in interest rates and currencies, including the value of the U.S. dollar relative to other currencies

• any malfunction or disruption of information technology systems and networks that our operations rely on or any impact of a possible cybersecurity breach;

• existing or future disputes, proceedings or litigation;

• future sales of our securities in the public market, and our ability to maintain compliance with applicable listing standards or the delisting of our Common Shares;

• volatility in our share price;

• potential conflicts of interest involving members of our board of directors, including our chief executive officer, senior management and certain of our service providers that are related parties;

• general domestic and international geopolitical conditions, such as political instability, events or conflicts (including armed conflicts, such as the war in Ukraine and the conflicts in the Middle East), acts of piracy or maritime aggression, such as recent maritime incidents involving vessels in and around the Red Sea, sanctions, “trade wars” (including as a result of tariffs imposed by the United States or other countries), and potential governmental requisitions of our vessel during a period of war or emergency;

• global public health threats and major outbreaks of disease;

• any material cybersecurity incident;

• changes in seaborne and other transportation, including due to the maritime incidents in and around the Red Sea, fluctuating demand for product tankers and/or disruption of shipping routes due to accidents, political events, international sanctions, international hostilities and instability, piracy, smuggling or acts of terrorism;

• changes in governmental rules and regulations or actions taken by regulatory authorities, including changes to environmental regulations applicable to the shipping industry and to vessel rules and regulations, as well as changes in inspection procedures and import and export controls;

• inadequacies in our insurance coverage;

• developments in tax laws, treaties or regulations or their interpretation in any country in which we operate and changes in our tax treatment or classification;

• the impact of climate change, adverse weather and natural disasters;

• accidents or the occurrence of other unexpected events, including in relation to the operational risks associated with transporting refined petroleum products; and

• other factors listed from time to time in registration statements, reports or other materials that we have filed with or furnished to the Commission, including our most recent Annual Report, which is incorporated by reference into this prospectus.

You should not place undue reliance on forward-looking statements contained in this prospectus supplement because they are statements about events that are not certain to occur as described or at all. All forward-looking statements in this prospectus supplement are qualified in their entirety by the cautionary statements contained in this prospectus supplement.

Any forward-looking statements contained herein are made only as of the date of this prospectus supplement, and except to the extent required by applicable law or regulation we undertake no obligation to update any forward-looking statement or statements to reflect events or circumstances after the date on which such statement is made or to reflect the occurrence of unanticipated events. New factors emerge from time to time, and it is not possible for us to predict all or any of these factors. Further, we cannot assess the impact of each such factor on our business or the extent to which any factor, or combination of factors, may cause actual results to be materially different from those contained in any forward-looking statement.

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ENFORCEABILITY OF CIVIL LIABILITIES

We are a Republic of the Marshall Islands corporation and our principal executive offices are located outside the United States. All of the directors, officers and our independent registered public accounting firm reside outside the United States. In addition, substantially all of our assets and the assets of certain of our directors, officers and our independent registered public accounting firm are located outside the United States. As a result, it may not be possible for you to serve legal process within the United States upon us or any of these persons. It may also not be possible for you to enforce, both in and outside the United States, judgments you may obtain in United States courts against us or these persons in any action, including actions based upon the civil liability provisions of U.S. federal or state securities laws.

Furthermore, there is substantial doubt that courts of such jurisdictions would enforce judgments of U.S. courts obtained in actions against us, our directors or officers and such experts based upon the civil liability provisions of applicable U.S federal and state securities laws or would enforce, in original actions, liabilities against us, our directors or officers and such experts based on those laws.

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PROSPECTUS SUPPLEMENT SUMMARY

This summary highlights information that appears elsewhere in this prospectus or in the documents incorporated by reference herein and is qualified in its entirety by the more detailed information, including the financial statements that appear in the documents incorporated by reference. This summary may not contain all of the information that may be important to you. As an investor or prospective investor, you should review carefully the entire prospectus supplement, including the risk factors, and the more detailed information that is included herein and in the documents incorporated by reference herein.

Unless the context otherwise requires, as used in this prospectus supplement, the terms “Company”, “we”, “us”, and “our” refer to Robin Energy Ltd. and all of its subsidiaries. We use the term deadweight ton, or dwt, in describing the size of vessels. Dwt, expressed in metric tons each of which is equivalent to 1,000 kilograms, refers to the maximum weight of cargo and supplies that a vessel can carry. Our reporting currency is the U.S. dollar and all references in this prospectus supplement to “$” or “dollars” are to U.S. dollars.

Our Company

We are an independent, growth-oriented shipping company that acquires, owns, charters and operates oceangoing Handysize tanker vessels and provides worldwide seaborne transportation services for refined petroleum products. As of the date of this prospectus, we maintain a fleet of one Handysize product tanker vessel with a cargo carrying capacity of 0.03 million dwt and an age of 19.3 years.

Under pre-existing agreements between various parties and our shipowning subsidiary, our vessel is currently contracted to operate in a pool, with such arrangement to be reevaluated by management on a periodic basis.

Chartering of our Fleet

We intend to actively market our vessel predominantly in the spot voyage market and/or enter into pool arrangements but may also enter into time charter contracts in order to secure optimal employment in the product tanker shipping market. As of June 16, 2025, our product tanker vessel was participating in a pool arrangement. Our existing pooling agreement does not have a specified termination date. We are, however, entitled to withdraw our product tanker from the pool arrangement and terminate this agreement by giving sixty days written notice, plus or minus thirty days in the pool manager’s option. For further information, please see “Item 4. Business-Chartering of our Fleet” in our Annual Report on Form 20-F for the year ended December 31, 2024 (the “Annual Report”) filed with the Securities and Exchange Commission on April 15, 2025 and incorporated by reference herein.

Management of our Company and our Fleet

Our vessel is commercially and technically managed by Castor Ships S.A. (“Castor Ships”), a company controlled by our Chairman and Chief Executive Officer, Petros Panagiotidis. Pursuant to a Master Management Agreement between us and Castor Ships entered into on April 14, 2025, Castor Ships manages our business overall and provides us with crew management, technical management, operational employment management, insurance management, provisioning, bunkering, commercial, chartering and administrative services, including, but not limited to, securing employment for our vessel, arranging and supervising the vessel’s commercial operations, handling all of the Company’s vessel sale and purchase transactions, undertaking related shipping projects, management advisory and support services, accounting and audit support services, as well as other associated services requested from time to time by us. Castor Ships may choose to subcontract these services to other parties at its discretion.

For further information, please see “Certain Relationships and Related Party Transactions—Management, Commercial and Administrative Services” in the Annual Report.

Corporate Information

Our principal executive office is at 223 Christodoulou Chatzipavlou Street, Hawaii Royal Gardens, 3036 Limassol, Cyprus. Our telephone number at that address is +357 25 357 769. Our website is www.robinenergy.com. This web address is provided as an inactive textual reference only. The SEC maintains an Internet site that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC. The address of the SEC’s Internet site is www.sec.gov. None of the information contained on, or that can be accessed through, these websites is incorporated into or forms a part of this prospectus.

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THE OFFERING

Common shares outstanding as of June 23, 2025

4,974,731 common shares

Common Shares offered by us

1,020,000 common shares

Common shares outstanding immediately after the offering⁽¹⁾

5,994,731 common shares

Use of proceeds

We intend to use the net proceeds from the sale of the securities offered by this prospectus supplement for working capital and general corporate purposes. We expect that the net proceeds of this offering will be approximately $[3.2] million, net of the Placement Agent’s fees and other estimated offering expenses. See “Use of Proceeds”.

Risk factors

Investing in our common shares is highly speculative and involves a high degree of risk. See “Risk Factors” beginning on page S-7 of this prospectus supplement and page 8 of the accompanying base prospectus and in our Annual Report, starting on page 3 thereof, which is incorporated by reference herein, to read about the risks you should consider before purchasing our common shares.

Listing

Our common shares currently trade on the Nasdaq under the symbol “RBNE”.

(1)
The number of Common Shares to be outstanding after this offering is based on 4,974,731 Common Shares outstanding as of June 23, 2025 and excludes as of such date Common Shares issuable upon conversion of our 1.00% Series A Fixed Rate Cumulative Perpetual Convertible Preferred Shares (the “Series A Preferred Shares”), with a cumulative preferred distribution accruing initially at a rate of 1.00% per annum on the stated amount of $25.00 per share, which are convertible, in whole or in part but not in an amount of less than 40,000 Series A Preferred Shares, at their holder’s option, to Common Shares from and after the second anniversary of their issue date at the lower of (i) 200% of the volume weighted average price (“VWAP”) of our Common Shares over the five consecutive trading day period commencing on and including the Spin Off distribution date (the “Distribution Date”), and (ii) the VWAP of our Common Shares over the five consecutive trading day period expiring on the trading day immediately prior to the date of delivery of written notice of the conversion. See “Description of Capital Stock—Series A Convertible Preferred Shares.”

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RISK FACTORS

An investment in our common shares involves a high degree of risk and uncertainty. We have identified a number of risk factors which you should consider before investing in our common shares. You should consider carefully the risks set forth below, those risk factors set forth under the heading “Risk Factors” in our Annual Report incorporated by reference in this prospectus supplement, and in any other documents we have incorporated by reference in this prospectus supplement, as well as those under the heading “Risk Factors” in the accompanying base prospectus before investing in our common shares. The occurrence of one or more of these risk factors could adversely affect our results of operations or financial condition.

Our share price may be highly volatile and, as a result, investors in our Common Shares could incur substantial losses.

Our stock price has recently been volatile and may continue to be volatile in the future. The stock market in general, and the market for shipping companies in particular, have experienced extreme volatility that has often been unrelated or disproportionate to the operating performance of particular companies. As a result of this volatility, investors may experience rapid and substantial losses on their investment in our Common Shares that are unrelated to our operating performance. Our stock price may exhibit similar volatility, which may cause our Common Shares to trade above or below what we believe to be their fundamental value. Furthermore, significant historical fluctuations in the market price of Toro’s Common Shares have been accompanied by reports of strong and atypical retail investor interest, including on social media and online forums, and, as Toro distributed our Common Shares to its common shareholders in connection with the Spin Off, we may experience similar patterns of investment.

Market volatility and trading patterns may create several risks for investors, including but not limited to the following:

• the market price of our Common Shares may experience rapid and substantial increases or decreases unrelated to our operating performance or prospects, or macro or industry fundamentals;

• to the extent volatility in our Common Shares is caused by a “short squeeze” in which coordinated trading activity causes a spike in the market price of our Common Shares as traders with a short position make market purchases to avoid or to mitigate potential losses, investors may purchase Common Shares at inflated prices unrelated to our financial performance or prospects, and may thereafter suffer substantial losses as prices decline once the level of short-covering purchases has abated; and

• if the market price of our Common Shares declines, you may be unable to resell your shares at or above the price at which you acquired them. We cannot assure you that the price of our Common Shares will not fluctuate, increase or decline significantly in the future, in which case you could incur substantial losses.

We may incur rapid and substantial increases or decreases in our stock price in the foreseeable future that may not coincide in timing with the disclosure of news or developments by or affecting us. Accordingly, the market price of our Common Shares may decline or fluctuate rapidly, regardless of any developments in our business. Overall, there are various factors, many of which are beyond our control, that could negatively affect the market price of our Common Shares or result in fluctuations in the price or trading volume of our Common Shares, which include but are not limited to:

• investor reaction to our business strategy;

• the sentiment of the significant number of retail investors whom we believe, will hold our Common Shares, in part due to direct access by retail investors to broadly available trading platforms, and whose investment thesis may be influenced by views expressed on financial trading and other social media sites and online forums;

• the amount and status of short interest in our Common Shares, access to margin debt, trading in options and other derivatives on our Common Shares and any related hedging and other trading factors;

• our continued compliance with the listing standards of the Nasdaq Capital Market and any action we may take to maintain such compliance, such as a reverse stock split;

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• regulatory or legal developments in the United States and other countries, especially changes in laws or regulations applicable to our industry;

• variations in our financial results or those of companies that are perceived to be similar to us;

• our ability or inability to raise additional capital and the terms on which we raise it;

• our dividend strategy;

• our continued compliance with any debt covenants;

• variations in the value of our fleet;

• declines in the market prices of stocks generally;

• trading volume of our Common Shares;

• sales of our Common Shares by us or our shareholders;

• speculation in the press or investment community about our Company, our industry or our securities;

• general economic, industry and market conditions; and

• other events or factors, including those resulting from such events, or the prospect of such events, including war, terrorism and other international conflicts, public health issues including health epidemics or pandemics, and natural disasters such as fire, hurricanes, earthquakes, tornados or other adverse weather and climate conditions, whether occurring in the United States or elsewhere, could disrupt our operations or result in political or economic instability.

Some companies that have experienced volatility in the market price of their common shares have been subject to securities class-action litigation. If instituted against us, such litigation could result in substantial costs and diversion of management’s attention and resources, which could materially and adversely affect our business, financial condition, operating results and growth prospects. There can be no guarantee that the price of our Common Shares will remain at or rise above its post-Distribution level or that future sales of our Common Shares will not be at prices lower than those initially distributed or sold to investors.

We have broad discretion in the use of the net proceeds from this offering and may use the net proceeds in ways with which you disagree.

Our management will have broad discretion in the application of the net proceeds from this offering and could spend the proceeds in ways that do not improve our results of operations or enhance the value of our securities. You will be relying on the judgment of our management with regard to the use of these net proceeds, and you will not have the opportunity, as part of your investment decision, to assess whether the net proceeds are being used appropriately. The failure by our management to apply these funds effectively could result in financial losses that could have a material adverse effect on our business, results of operations and cash flows, and cause the price of our securities to decline. Pending the application of these funds, we may invest the net proceeds from this offering in a manner that does not produce income or that loses value.

Future issuances of additional Common Shares, including as a result of an optional conversion of Series A Preferred Shares, or the potential for such issuances, may adversely impact the price of our Common Shares and could impair our ability to raise capital through equity offerings. Shareholders may experience significant dilution as a result of any such issuances.

Robin has an authorized share capital of 3,900,000,000 Common Shares that it may issue without further shareholder approval. In order to raise additional capital and as part of our business strategy, including funding the expansion of our fleet and supporting our further growth plans, or in connection with equity awards, strategic transactions or otherwise, we may in the future offer additional Common Shares, preferred shares, or other securities convertible into or exchangeable for our Common Shares, including convertible debt or warrants. As part of our business strategy, we may rely in part on issuances of equity or preferred securities, which may carry voting rights and may be convertible into Common Shares. We may issue such securities in private placements, including to related parties, or in registered offerings. In addition, our Series A Convertible Preferred Stock is convertible at a conversion price equal to the lower of (i) $200% of the VWAP of our Common Shares over the five consecutive trading day period commencing on and including April 14, 2025 and (ii) the VWAP of our

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common stock over the five consecutive trading day period expiring on the trading day immediately prior to the date of delivery of written notice of the conversion, which may result in the issuance of common stock upon conversion of such preferred stock at an effective price lower than the price per share paid by other investors. The issuance of additional common stock, preferred stock or other securities could adversely impact the trading price of our Common Shares.

We cannot assure you at what price the offering of our shares in the future, if any, will be made but they may be offered and sold at a price significantly below the current trading price of our Common Shares or the acquisition price of Common Shares by shareholders and may be at a discount to the trading price of our Common Shares at the time of such sale. Purchasers of the Common Shares we sell, as well as our existing shareholders, will experience significant dilution if we sell shares at prices significantly below the price at which they invested, and investors purchasing shares or other securities in the future could have rights that are superior to existing shareholders.

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USE OF PROCEEDS

We intend to use the net proceeds from the sale of the securities offered by this prospectus supplement for working capital and general corporate purposes. We expect that the net proceeds of this offering will be approximately $[3.2] million, net of the Placement Agent’s fees and other estimated offering expenses.

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CAPITALIZATION

The following table sets forth our capitalization as of December 31, 2024. The table presents information:

• on an actual basis;

• on an as adjusted basis to give effect to the (1) issuance of (i) 2,386,731 Common Shares, par value $0.001 per share, (ii) 2,000,000 Series A Preferred Shares, par value $0.001 per share, and (iii) 40,000 Series B Preferred Shares, par value $0.001 per share, and the contribution to us by Toro Corp. of $10,356,450 in cash, each in connection with our spin off from Toro on April 14, 2025; (2) the issuance and sale of 965,000 common shares to certain institutional investors on June 17, 2025 at an offering price of $5.25 per share resulting in net proceeds of approximately $4.2 million, net of estimated fees and expenses of approximately $833,833; (3) the issuance and sale of 860,000 common shares to certain institutional investors on June 18, 2025 at an offering price of $5.25 per share resulting in net proceeds of approximately $4.1 million, net of estimated fees and expenses of approximately $462,765; and (4) the issuance and sale of 763,000 common shares to certain institutional investors on June 20, 2025 at an offering price of $5.25 per share resulting in net proceeds of approximately $3.6 million, net of estimated fees and expenses of approximately $422,025;

• on an as further adjusted basis to give effect to the issuance and sale of 1,020,000 common shares in this offering at an offering price of $3.50 per share resulting in net proceeds of approximately $[3.2] million, net of estimated fees and expenses of approximately $[ ].

(All figures in U.S. dollars)			Actual As of December 31, 2024			As Adjusted As of December 31, 2024			As Further Adjusted For This Offering
Debt:			$—			$—			$—
Mezzanine equity:									—
Series A Preferred Shares(1)			$—			$20,000,000			$20,000,000
Parent company equity/ Shareholders Equity:
Net parent investment			$21,111,822			$—			$—
Capital Stock			—			4,975			[ ]
Series B Preferred Shares			—			40			40
Additional paid-in capital			—			23,331,634			[ ]
Retained earnings			—			—			—
Total parent company equity/ Shareholders Equity			$21,111,822			$23,336,649			$​[ ]
Total Capitalization			$21,111,822			$43,336,649			$​[ ]

(1)
Series A Preferred shares are presented at fair value as determined by management in consideration of a number of data points, including a valuation performed by an independent third-party consulting firm. The valuation methodology applied comprised the bifurcation of the value of the Series A Preferred Shares in two components namely, the “straight” preferred stock component and the option component. The mean of the sum of the two components was used to estimate the value for the Series A Preferred Shares at $20 million. The valuation methodology and the significant unobservable inputs used for each component are set out below:

				Valuation Technique			Unobservable Input			Range (Weighted average)
	“Straight” Preferred stock component			Discounted Cash Flow model			•  Weighted average cost of Capital			10.55%
	Option Component			Black Scholes			•  Volatility •  Risk free rate •  Weighted average cost of Capital •  Strike price			114.48% 4.30% 10.55% $10

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DILUTION

Dilution or accretion is the amount by which the offering price paid by the purchasers of our common shares in this offering will differ from the net tangible book value per common share after the offering. The net tangible book value per common share is equal to the amount of our total tangible assets (total assets less intangible assets) less total liabilities and mezzanine equity divided by the number of common shares outstanding. The historical net tangible book value as of December 31, 2024 was $21.1 million in total and $8.85 per share for the number of shares of the existing shareholders that were outstanding at that date.

The as adjusted (1) net tangible book value as of December 31, 2024 was $11.5 million in total and $4.81 per common share for the as adjusted number of shares of the existing shareholders that were outstanding at that date, after giving effect to the (1) issuance of (i) 2,386,731 Common Shares, par value $0.001 per share, (ii) 2,000,000 Series A Preferred Shares, par value $0.001 per share, and (iii) 40,000 Series B Preferred Shares, par value $0.001 per share, and the contribution to us by Toro Corp. of $10,356,450 in cash, each in connection with our spin off from Toro Corp on April 14, 2025; (2) net tangible book value as of December 31, 2024 would have been $15.7 million, or $4.68 per common share after the issuance and sale by us of 965,000 common shares at $5.25 per share to certain institutional investors on June 17, 2025, after deducting estimated expenses related to such offering; (3) net tangible book value as of December 31, 2024 would have been $19.8 million, or $4.690 per common share after the issuance and sale by us of 860,000 common shares at $5.25 per share to certain institutional investors on June 18, 2025, after deducting estimated expenses related to such offering; and (4) net tangible book value as of December 31, 2024 would have been $23.3 million, or $4.691 per common share after the issuance and sale by us of 763,000 common shares at $5.25 per share to certain institutional investors on June 20, 2025, after deducting estimated expenses related to such offering.

The as further adjusted (2) net tangible book value as of December 31, 2024 would have been $[ ] million, or $[ ] per common share after the issuance and sale by us of 1,020,000 common shares at $3.50 per share in this offering, after deducting estimated expenses related to this offering. This represents an immediate increase in net tangible book value of $[ ] per share to the existing shareholders and an immediate dilution in net tangible book value of $[ ] per share to new investors.

The following table illustrates the pro forma per share dilution and increase in net tangible book value as of December 31, 2024:

Offering price per common share			$3.50
As adjusted(1) net tangible book value per common share before this offering			$4.691
Increase in as adjusted net tangible book value attributable to this offering			$[ ]
As further adjusted(2) net tangible book value per common share after giving effect to this offering			$[ ]
Dilution per common share to new investors			$[ ]

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DESCRIPTION OF THE SECURITIES WE ARE OFFERING

We are offering 1,020,000 shares of our common stock pursuant to this prospectus supplement and the accompanying prospectus. The material terms and provisions of our common stock are described below and under the caption “Description of the Capital Stock” beginning on page 11 of the accompanying prospectus.

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PLAN OF DISTRIBUTION

Pursuant to a placement agency agreement, dated June 24, 2025, or the “Placement Agency Agreement”, between us and the Placement Agent, we have engaged the Placement Agent to act as the exclusive placement agent in connection with this offering. The Placement Agent is not purchasing or selling any of the securities we are offering by this prospectus supplement, and is not required to arrange the purchase or sale of any specific number of shares or dollar amount, but the Placement Agent has agreed to use “reasonable best efforts” to arrange for the sale of the securities offered hereby.

Our agreement with the Placement Agent provides that the obligations of the Placement Agent are subject to certain conditions precedent, including, among other things, the absence of any material adverse change in our business and the receipt of customary opinions and closing certificates.

The Placement Agent shall arrange for the sale of the securities we are offering pursuant to this prospectus supplement to one or more Investors through a Securities Purchase Agreement directly between the Investors (acting severally and not jointly) and us (the “Securities Purchase Agreement”). All of the securities offered hereby will be sold at the same price and, we expect, at a single closing. We established the price following negotiations with prospective Investors and with reference to the prevailing market price of our securities, recent trends in such price and other factors. It is possible that not all of the securities we are offering pursuant to this prospectus supplement will be sold at the closing, in which case our net proceeds would be reduced. We expect that the sale of the securities will be completed on or around the date indicated on the cover page of this prospectus supplement.

Under the Securities Purchase Agreement, we have agreed not to contract to issue or announce the issuance or proposed issuance of any securities or common share equivalents for 15 days following the closing of this offering with certain exceptions.

Fees and Expenses

We will pay the Placement Agent a placement agent fee equal to 7.0% of the aggregate purchase price of our securities sold in this offering. The following table shows the per share and total cash Placement Agent’s fees we will pay to the Placement Agent in connection with the sale of the securities offered hereby, assuming the purchase of all of the securities we are offering.

			Per Share			Total
Public offering price			$3.50			$3,570,000.00
Placement agent fees			$0.245			$​249,900.00
Proceeds to the Company before expenses			$3.255			$3,320,100.00

The Placement Agent may be deemed to be an underwriter within the meaning of Section 2(a)(11) of the Securities Act, and any commissions received by it and any profit realized on the resale of the shares sold by it while acting as principal might be deemed to be underwriting discounts or commissions under the Securities Act. As underwriter, the Placement Agent would be required to comply with the requirements of the Securities Act and the Securities Exchange Act of 1934, as amended, or the Exchange Act, including, without limitation, Rule 415(a)(4) under the Securities Act and Rule 10b-5 and Regulation M under the Exchange Act. These rules and regulations may limit the timing of purchases and sales of shares by the placement agent acting as principal. Under these rules and regulations, the placement agent:

• may not engage in any stabilization activity in connection with our securities; and

• may not bid for or purchase any of our securities or attempt to induce any person to purchase any of our securities, other than as permitted under the Exchange Act, until it has completed its participation in the distribution.

We estimate that the total expenses of the offering payable by us, excluding the Placement Agent’s fees, will be approximately $[ ], which include up to $50,000 of legal fees and expenses that we have agreed to reimburse the Placement Agent in connection with this offering.

Tail Fee

We have also agreed to pay the placement agent a tail fee equal to the cash compensation in this offering, if any investor, who was contacted or introduced to us by the placement agent in connection with this offering or

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during the term of its engagement, provides us with capital in any public or private offering or other financing or capital raising transaction during the twelve-month period following closing of this offering or expiration or termination of our engagement with the placement agent other than termination for cause.

This prospectus supplement and the accompanying base prospectus may be made available in electronic format on websites or through other online services maintained by the Placement Agent or by an affiliate. Other than this prospectus supplement and the accompanying base prospectus, the information on the placement agent’s website and any information contained in any other website maintained by the Placement Agent is not part of this prospectus supplement and the accompanying base prospectus or the registration statement of which this prospectus supplement and the accompanying base prospectus form a part, has not been approved and/or endorsed by us or the Placement Agent, and should not be relied upon by Investors.

The foregoing does not purport to be a complete statement of the terms and conditions of the Placement Agency Agreement and the Securities Purchase Agreement. A copy of the Placement Agency Agreement with the Placement Agent and Securities Purchase Agreement with the purchasers will be included as exhibits to our Current Report on Form 6-K filed or to be filed with the SEC and incorporated by reference into the registration statement of which this prospectus supplement and the accompanying base prospectus form a part. See “Information Incorporated by Reference” and “Where You Can Find More Information”.

No action has been or will be taken in any jurisdiction (except in the United States) that would permit a public offering of the securities offered by this prospectus supplement and accompanying base prospectus, or the possession, circulation or distribution of this prospectus supplement and accompanying base prospectus or any other material relating to us or the securities offered hereby in any jurisdiction where action for that purpose is required. Accordingly, the securities offered hereby may not be offered or sold, directly or indirectly, and neither of this prospectus supplement and accompanying base prospectus nor any other offering material or advertisements in connection with the securities offered hereby may be distributed or published, in or from any country or jurisdiction except in compliance with any applicable rules and regulations of any such country or jurisdiction. The Placement Agent may arrange to sell securities offered by this prospectus supplement and accompanying base prospectus in certain jurisdictions outside the United States, either directly or through affiliates, where they are permitted to do so.

Relationships

The Placement Agent and its affiliates may provide from time to time in the future certain commercial banking, financial advisory, investment banking and other services for us in the ordinary course of their business, for which they may receive customary fees and commissions. In addition, from time to time, the Placement Agent and its affiliates may effect transactions for their own account or the account of customers, and hold on behalf of themselves or their customers, long or short positions in our debt or equity securities or loans, and may do so in the future. However, except as disclosed in this prospectus supplement and the accompanying base prospectus, we have no present arrangements with the Placement Agent for any further services.

Transfer Agent and Registrar

The registrar and transfer agent for our securities is Broadridge Corporate Issuer Solutions, LLC.

Listing

Our Common Shares are listed on the Nasdaq Capital Market under the symbol “RBNE.”

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LEGAL MATTERS

The validity of the securities offered by this prospectus will be passed upon for us by Goodwin Procter LLP with respect to matters of New York law, and by Seward & Kissel LLP with respect to matters of Marshall Islands law. Ellenoff Grossman & Schole LLP, New York, New York, is representing the Placement Agent in this offering.

EXPERTS

The combined carve-out financial statements of Robin Energy Ltd. Predecessor as of December 31, 2023 and 2024, and for each of the three years in the period ended December 31, 2024, incorporated by reference in this Prospectus by reference to Robin Energy Ltd. annual report on Form 20-F for the year ended December 31, 2024 have been audited by Deloitte Certified Public Accountants, S.A., an independent registered public accounting firm, as stated in their report. Such financial statements are incorporated by reference in reliance upon the report of such firm given upon their authority as experts in accounting and auditing.

The consolidated financial statements of Robin Energy Ltd., as of December 31, 2024, and for the period September 24, 2024 to December 31, 2024, incorporated by reference in this Prospectus by reference to Robin Energy Ltd. annual report on Form 20-F for the period September 24, 2024 to December 31, 2024 have been audited by Deloitte Certified Public Accountants, S.A., an independent registered public accounting firm, as stated in their report. Such financial statements are incorporated by reference in reliance upon the report of such firm given upon their authority as experts in accounting and auditing.

The office of Deloitte Certified Public Accountants, S.A. is located at Fragoklissias 3a & Granikou Street, Maroussi, Athens 151 25, Greece.

WHERE YOU CAN FIND ADDITIONAL INFORMATION

As required by the Securities Act, we filed a registration statement relating to the securities offered by this prospectus supplement with the Commission. This prospectus supplement and the accompanying base prospectus are a part of that registration statement, which includes additional information.

We file annual and special reports within the Commission. The Commission maintains a website (http://www.sec.gov) that contains reports, proxy and information statements and other information regarding registrants that file electronically with the Commission. Our filings are also available on our website at http:// www.robinenergy.com. The information on our website, however, is not, and should not be deemed to be, a part of this prospectus supplement. Further, other than as described below, the information contained in or accessible from the Commission’s website is not part of this prospectus supplement and the accompanying base prospectus.

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-INFORMATION INCORPORATED BY REFERENCE

The SEC allows us to “incorporate by reference” the information we file with the SEC. This means that we can disclose important information to you by referring you to another document filed separately with the SEC. The information incorporated by reference is considered to be part of this prospectus.

This prospectus incorporates by reference the following documents:

• our Annual Report on Form 20-F for the year ended December 31, 2024, filed with the SEC on April 15, 2025;

• Our Reports on Form 6-K filed with the SEC on June 17, 2025, June 18, 2025 and June 20, 2025;

• The description of the Common Shares contained in Exhibit 2.1 to the Annual Report, including any amendment or report filed for the purpose of updating such description.

We will provide, free of charge upon written or oral request, to each person to whom this prospectus is delivered, including any beneficial owner of the securities, a copy of any or all of the information that has been incorporated by reference into this prospectus supplement, but which has not been delivered with the prospectus. Copies of these documents also may be obtained on the “Investors” section of our website at www.robinenergy.com. The information contained on or linked to or from our website is not incorporated by reference into this prospectus supplement and should not be considered part of this prospectus supplement. Requests for such information should be made to us at the following address:

Robin Energy Ltd.

223 Christodoulou Chatzipavlou Street

Hawaii Royal Gardens

3036 Limassol

Cyprus

You should assume that the information appearing in this prospectus supplement and the accompanying base prospectus, as well as the information we previously filed with the SEC and incorporated by reference, is accurate as of the dates on the front cover of those documents only. Our business, financial condition and results of operations and prospects may have changed since those dates.

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$250,000,000

ROBIN ENERGY LTD.

Common Shares (including associated Preferred Share Purchase Rights), Preferred Shares, Debt Securities, Warrants, Purchase Contracts, Rights and

Units

We may use this prospectus to offer, from time to time in one or more offerings, of up to an aggregate amount of $250,000,000 common shares, par value $0.001 per share (including associated Preferred Share Purchase Rights under our Shareholder Protection Rights Agreement), preferred shares, debt securities, warrants, purchase contracts, rights or units. Such securities will be offered in amounts, at prices and on terms to be determined at the time of their offering and will be described in a supplement to this prospectus.

The securities described in this prospectus may be sold directly, on a continuous or delayed basis, through dealers or agents designated from time to time, to or through underwriters or through a combination of these methods. See “Plan of Distribution.” We may also describe the plan of distribution for any particular offering of the securities in any applicable prospectus supplement. The names of any underwriters, agents or dealers will be included in a supplement to this prospectus.

Our common shares are listed on the Nasdaq Capital Market (the “Nasdaq”) under the symbol “RBNE”. On April 15, 2025, the closing price for our common shares as reported on the Nasdaq was $4.60 per share. The aggregate market value of our outstanding common shares held by non-affiliates on April 15, 2025 was $5,015,504.20 based on 1,090,327 common shares issued and outstanding held by non-affiliates and a per share price of $4.60 based on the closing sale price of our common shares on April 15, 2025 as reported by Nasdaq. Pursuant to General Instruction I.B.5 of Form F-3, in no event will we sell our securities in a public primary offering with a value exceeding more than one-third of our public float in any 12-month period so long as our public float remains below $75 million. During the 12 calendar months prior to and including the date of this prospectus, we have not offered or sold any securities pursuant to General Instruction I.B.5 of Form F-3.

You should read this prospectus and any applicable prospectus supplement, as well as any documents incorporated by reference into this prospectus or any prospectus supplement, carefully before you invest. This prospectus may not be used to sell securities unless accompanied by a prospectus supplement.

Investing in these securities involves certain risks. See “Risk Factors” beginning on page 8.

Neither the Securities and Exchange Commission nor any other regulatory body has approved or disapproved of these securities, or passed upon the accuracy or adequacy of this prospectus. Any representation to the contrary is a criminal offense.

Prospectus dated April 28, 2025

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ABOUT THIS PROSPECTUS			1
CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS			2
ROBIN ENERGY LTD.			5
WHERE YOU CAN FIND MORE INFORMATION			6
INCORPORATION BY REFERENCE			7
RISK FACTORS			8
USE OF PROCEEDS			9
CAPITALIZATION			10
DESCRIPTION OF CAPITAL STOCK			11
DESCRIPTION OF DEBT SECURITIES			12
DESCRIPTION OF WARRANTS			14
DESCRIPTION OF PURCHASE CONTRACTS			15
DESCRIPTION OF RIGHTS			16
DESCRIPTION OF UNITS			17
PLAN OF DISTRIBUTION			18
TAX CONSIDERATIONS			20
EXPENSES			21
VALIDITY OF SECURITIES			22
EXPERTS			22
ENFORCEABILITY OF CERTAIN CIVIL LIABILITIES			23

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ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement that we filed with the U.S. Securities and Exchange Commission (the “SEC”) utilizing a shelf registration process. Under this shelf process, we may sell from time to time any combination of the securities described in this prospectus in one or more offerings. This prospectus provides you with a general description of the securities we may offer. Each time we offer securities, we will provide a prospectus supplement that will contain specific information about the terms of those securities and their offering. The prospectus supplement may also add, update or change information contained in this prospectus and we may add, update or change information contained in this prospectus by incorporating by reference information that we file or furnish to the SEC. The particular terms of any security will be described in the related prospectus supplement. If there is any inconsistency between the information in this prospectus and any prospectus supplement, you should rely on the information in the prospectus supplement. You should read both this prospectus and any prospectus supplement together with the additional information described under the heading “Where You Can Find Additional Information.”

This prospectus and any prospectus supplement do not contain all of the information in the registration statement. Documents establishing the terms of the offered securities are filed as exhibits to the registration statement or will be filed with documents that we file or furnish to the SEC and incorporate by reference in this prospectus. Statements in this prospectus or any prospectus supplement about these documents are summaries and each statement is qualified in all respects by reference to the document to which it refers. You should refer to the actual documents for a more complete description of the relevant matters. For further information about us or the securities offered hereby, you should refer to the registration statement, which you can obtain as described below under “Where You Can Find Additional Information.”

We have not authorized anyone to provide any information or to make any representations other than as contained or incorporated by reference in this prospectus, any accompanying prospectus supplement or any free writing prospectus prepared by or on behalf of us. We take no responsibility for and can provide no assurance as to the reliability of, any information that others may give you. The information contained or incorporated by reference in this prospectus and any prospectus supplement is accurate as of the dates of the applicable documents. Our business, financial condition, results of operations and prospects may have changed since the applicable dates. When this prospectus or a prospectus supplement are delivered or a sale pursuant to this prospectus or a prospectus supplement is made, we are not implying that the information is current as of the date of the delivery or sale. You should not consider any information in this prospectus, any prospectus supplement or in the documents incorporated by reference herein to be investment, financial, legal or tax advice. We encourage you to consult your own counsel, accountant and other advisors for legal, tax, business, financial and related advice regarding an investment in our securities.

We are offering to sell, and seeking offers to buy, securities only in jurisdictions where offers and sales are permitted. The distribution of this prospectus and the offering of securities in certain jurisdictions may be restricted by law. Persons outside the United States who come into possession of this prospectus must inform themselves about, and observe any restrictions relating to, the offering of the securities and the distribution of this prospectus outside the United States. This prospectus does not constitute, and may not be used in connection with, an offer to sell, or a solicitation of an offer to buy, any securities offered by this prospectus by any person in any jurisdiction in which it is unlawful for such person to make such an offer or solicitation.

Unless the context otherwise requires, as used in this prospectus, the terms “Company”, “we”, “us” and “our” refer to Robin Energy Ltd. and all of its subsidiaries, and “Robin” refers only to Robin Energy Ltd. and not to its subsidiaries. The common shares, par value $0.001 per share (including associated Preferred Share Purchase Rights under our Shareholder Protection Rights Agreement), preferred shares, debt securities, warrants, purchase contracts, rights and units that may be offered using this prospectus are referred to collectively as the “securities”. We use the term deadweight ton, or dwt, in describing the size of vessels. Dwt, expressed in metric tons each of which is equivalent to 1,000 kilograms, refers to the maximum weight of cargo and supplies that a vessel can carry. Unless otherwise indicated, all references to “dollars” and “$” in this prospectus are to, and amounts presented in this prospectus are in, United States dollars and financial information presented in this prospectus that is derived from financial statements incorporated by reference is prepared in accordance with accounting principles generally accepted in the United States.

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CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

The forward-looking information in this prospectus may not accurately predict future results.

The disclosure and analysis set forth in this prospectus includes assumptions, expectations, projections, intentions and beliefs about future events in a number of places, particularly in relation to our operations, cash flows, financial position, plans, strategies, business prospects, changes and trends in our business and the markets in which we operate. We intend such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in Section 27A of the Securities Act of 1933, as amended (the “Securities Act”) and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Forward-looking statements include all matters that are not historical facts or matters of fact at the date of this prospectus and reflect our current views with respect to future events and financial performance. These forward-looking statements may generally, but not always, be identified by the use of works such as “anticipate”, “believe”, “targets”, “likely”, “will”, “would”, “could”, “should”, “seeks”, “continue”, “contemplate”, “possible”, “might”, “expect”, “intend”, “estimate”, “forecast”, “project”, “plan”, “objective”, “potential”, “may”, “anticipates” or similar expressions or phrases.

The forward-looking statements in this prospectus are based upon various assumptions, many of which are based, in turn, upon further assumptions, including without limitation, management’s examination of historical operating trends, data contained in our records and other data available from third parties. Although we believe that these assumptions were reasonable when made, because these assumptions are inherently subject to significant uncertainties and contingencies which are difficult or impossible to predict and are beyond our control, we cannot assure you that we will achieve or accomplish these forward-looking statements, including these expectations, beliefs or projections.

In addition to these assumptions, important factors that, in our view, could cause actual results to differ materially from those discussed in the forward-looking statements include generally:

• the effects of our spin-off from Toro Corp.

• our business strategy, expected capital spending and other plans and objectives for future operations, including our ability to expand our business as a new entrant to the handysize tanker shipping industry;

• shipping market conditions and trends, including volatility and cyclicality in charter rates of the shipping segments we operate, factors affecting supply and demand for vessels such as fluctuations in demand for and the price of the products we transport, fluctuating vessel values, changes in worldwide fleet capacity, opportunities for the profitable operations of vessels in the segment of the shipping industry in which we operate and global economic and financial conditions, including interest rates, inflation, trade developments and the growth rates of world economies;

• our ability to realize the expected benefits of any vessel acquisitions or sales, and the effects of any change in our fleet’s size or composition, increased transaction costs and other adverse effects (such as lost profit) due to any failure to consummate any sale of our vessel, on our future financial condition, operating results, future revenues and expenses, future liquidity and the adequacy of cash flows from our operations;

• our relationships with our current and future service providers and customers, including the ongoing performance of their contractual obligations, dependence on their expertise, compliance with applicable laws, and any impacts on our reputation due to our association with them;

• the availability of debt or equity financing on standard market terms and our ability to comply with the covenants in agreements relating thereto, in particular due to economic, financial or operational reasons;

• our continued ability to enter into time charters, voyage charters or pool arrangements with existing and new customers and pool operators, and to re-charter our vessel upon the expiry of the existing pool agreement;

• the successful operations of our vessel in the competitive spot charter market and our pool operator’s financial performance, including its ability to obtain profitable sport charters;

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• any failure by our contractual counterparties to meet their contractual obligations under the existing agreements we have entered into with them;

• changes in our operating and capitalized expenses, including bunker prices, dry-docking, insurance costs, costs associated with regulatory compliance and costs associated with climate change;

• our ability to fund future capital expenditures and investments in the refurbishment of our vessel (including the amount and nature thereof and the timing of completion thereof, the delivery and commencement of operations dates, expected downtime and lost revenue);

• instances of off-hire;

• fluctuations in interest rates and currencies, including the value of the U.S. dollar relative to other currencies;

• any malfunction or disruption of information technology systems and networks that our operations rely on or any impact of a possible cybersecurity breach;

• existing or future claims, disputes, proceedings or litigation;

• future sales of our securities in the public market, and our ability to maintain compliance with applicable listing standards or the delisting of our common shares;

• volatility in our share price;

• potential conflicts of interest involving members of our board of directors, senior management and certain of our service providers that are related parties;

• general domestic and international geopolitical conditions, such as political instability, events or conflicts (including armed conflicts, such as the war in Ukraine and the conflict in the Middle East), acts of piracy or maritime aggression, such as recent maritime incidents involving vessels in and around the Red Sea, sanctions, potential governmental requisitions of our vessel during a period of war or emergency;

• global public health threats and major outbreaks of disease;

• any material cybersecurity incident;

• changes in seaborne and other transportation, including due to the maritime incidents in and around the Red Sea, fluctuating demand for product tankers and/or disruption of shipping routes due to accidents, political events, international sanctions, international hostilities and instability, piracy, smuggling or acts of terrorism;

• changes in governmental rules and regulations or actions taken by regulatory authorities, including changes to environmental regulations applicable to the shipping industry and to vessel rules and regulations, as well as changes in inspection procedures and import and export controls;

• inadequacies in our insurance coverage;

• developments in tax laws, treaties or regulations or their interpretation in any country in which we operate and changes in our tax treatment or classification;

• “trade wars”, including as a result of tariffs recently imposed by the United States and retaliatory tariffs imposed or threatened by other countries, and the impact of trade barriers and developments in rules and regulations regarding the global trade of commodities we transport in our vessel;

• the impact of climate change, adverse weather and natural disasters;

• accidents or the occurrence of other unexpected events, including in relation to the operational risks associated with transporting refined petroleum products; and

• any other factor described in this prospectus, or in our filings with the SEC incorporated by reference herein, including Robin’s Annual Report on Form 20-F for the year ended December 31, 2024 (the “Annual Report”) filed with the SEC on April 15, 2025, incorporated by reference herein.

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The information set forth in this prospectus or the documents incorporated by reference into this prospectus speaks only as of the dates stated in these documents, and we disclaim any intention or obligation to update any forward-looking statements as a result of developments occurring after the date of this communication, except to the extent required by applicable law. New factors emerge from time to time, and it is not possible for us to predict all or any of these factors. Further, we cannot assess the impact of each such factor on our business or the extent to which any factor, or combination of factors, may cause actual results to be materially different from those contained in any forward-looking statement. Please see our filings with the SEC for a more complete discussion of these foregoing and other risks and uncertainties. These factors and the other risk factors described in this prospectus and the documents incorporated by reference into this prospectus are not necessarily all of the important factors that could cause actual results or developments to differ materially from those expressed in any of our forward-looking statements. Given these uncertainties, prospective investors are cautioned not to place undue reliance on such forward-looking statements.

You should carefully consider the cautionary statements contained or referred to in this section in connection with the forward looking statements contained in this prospectus or the documents incorporated by reference into this prospectus and any subsequent written or oral forward-looking statements that may be issued by us or persons acting on our behalf.

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ROBIN ENERGY LTD.

We are a growth-oriented shipping company that acquires, owns, charters and operates a handysize product tanker vessel and provides worldwide seaborne energy transportation services. As of April 15, 2025, we maintain a fleet of one handysize product tanker vessel, with a capacity of 0.03 million dwt.

Our common shares trade on the Nasdaq Capital Market under the symbol “RBNE”.

Robin Energy Ltd. is incorporated in the Marshall Islands and has its principal executive offices at 223 Christodoulou Chatzipavlou Street, Hawaii Royal Gardens, 3036 Limassol, Cyprus, Tel: +357 25 357 769. Our website is www.robinenergy.com. Information contained on our website or connected thereto is provided for textual reference only and does not constitute part of, and is not incorporated by reference into, this prospectus or the registration statement of which it forms a part.

Upon the completion of our spin-off from Toro Corp. on April 14, 2025, we began operating as a separate company from Toro Corp, the Nasdaq-listed ship-owning company of which we were previously a part and of which our business comprised a reporting segment.

You can find a more detailed description of Robin’s business in the Annual Report and other documents incorporated by reference into this prospectus.

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WHERE YOU CAN FIND MORE INFORMATION

We have filed with the SEC a registration statement on Form F-3 under the Securities Act. Under the registration statement, we may sell from time to time up to $250,000,000 of the securities described in this prospectus in one or more offerings. This prospectus, which is part of the registration statement, does not contain all of the information set forth in the registration statement and the exhibits and schedules to the registration statement. For further information, we refer you to the registration statement and the exhibits and schedules filed as part of the registration statement. If a document has been filed as an exhibit to the registration statement, we refer you to the copy of the document that has been filed. Each statement in this prospectus relating to a document filed as an exhibit is qualified in all respects by the filed exhibit. You may review a copy of the registration statement through the SEC’s website.

We are subject to the informational requirements of the Exchange Act. In accordance with these requirements we file reports and other information with the SEC, including annual reports on Form 20-F and periodic reports on Form 6-K. The SEC maintains an Internet website that contains reports and other information about issuers, like us, that file electronically with the SEC. The address of that website is www.sec.gov. Our filings are also available on our website at www.robinenergy.com. This web address is provided as an inactive textual reference only. Information contained on, or that can be accessed through, these websites, does not constitute part of, and is not incorporated into, this prospectus.

As a foreign private issuer, we are exempt under the Exchange Act from, among other things, the rules prescribing the furnishing and content of proxy statements, and our executive officers, directors and principal shareholders are exempt from the reporting and short-swing profit recovery provisions contained in Section 16 of the Exchange Act. In addition, we are not required under the Exchange Act to file periodic reports and financial statements with the SEC as frequently or as promptly as U.S. companies whose securities are registered under the Exchange Act. However, we furnish or make available to our shareholders annual reports containing our financial statements prepared in accordance with U.S. GAAP.

You may also request a copy of our filings at no cost, excluding the exhibits to such filings, by writing or telephoning us at the following address:

Robin Energy Ltd.

223 Christodoulou Chatzipavlou Street

Hawaii Royal Gardens

3036 Limassol, Cyprus

Tel: + 357 25 357 769

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INCORPORATION BY REFERENCE

The SEC allows us to incorporate by reference in this prospectus information contained in documents that we file with it. This means that we can disclose important information to you by referring to these documents. The information that we incorporate by reference is an important part of this prospectus. We incorporate by reference in this prospectus the following documents and any future filings that we make with the SEC under Sections 13(a), 13(c) and 15(d) of the Exchange Act until we complete the offerings using this prospectus:

• Annual Report of Robin Energy Ltd. on Form 20-F for the year ended December 31, 2024, filed on April 15, 2025; and

• The description of the Common Shares contained in Exhibit 2.1 to the Annual Report, including any amendment or report filed for the purpose of updating such description.

In addition, all reports and other documents subsequently filed (but not furnished) by us pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act (i) after the date of the initial registration statement on Form F-3 of which this prospectus forms a part and prior to the effectiveness of such registration statement and (ii) after the date of this prospectus and until the filing of a post-effective amendment to the registration statement of which this prospectus forms a part which indicates that all securities offered have been sold or which deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference in this prospectus and to be a part hereof from their respective dates of filing. In addition, we will incorporate by reference certain future materials furnished to the SEC on Form 6-K after the filing date of the initial registration statement on Form F-3, but only to the extent specifically indicated in those submissions or in a future prospectus supplement.

The information that Robin files with the SEC, including future filings, automatically updates and supersedes information in documents filed at earlier dates. All information appearing in this prospectus is qualified in its entirety by the information and financial statements, including the notes, contained in the documents that we incorporate by reference in this prospectus.

The Annual Report contains a summary description of our business and audited consolidated financial statements with a report by our independent registered public accounting firm. These financial statements are prepared in accordance with U.S. GAAP.

We have not authorized anyone to provide any information or to make any representations other than as contained or incorporated by reference in this prospectus, any accompanying prospectus supplement or any free writing prospectus prepared by or on behalf of us. We take no responsibility for, and can provide no assurance as to the reliability of, any information that others may give you. We are not making an offer of these securities in any jurisdiction where the offer is not permitted. You should not assume that the information in this prospectus or any prospectus supplement is accurate as of any date other than the date on the front of those documents.

You may obtain any of the documents incorporated by reference in this prospectus as specified in the section of this prospectus captioned “Where You Can Find More Information”.

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RISK FACTORS

Investing in the securities involves a high degree of risk. Before investing in our securities, you should carefully consider all of the information included or incorporated by reference into this prospectus and any prospectus supplement, including the risks described under the heading “Risk Factors” in the Annual Report, as updated by annual and other reports and documents we file with or furnish to the SEC that are incorporated by reference herein. If any of these risks actually occur, our business, financial condition and results of operations could suffer, the trading price and liquidity of our securities could decline and you may lose all or part of your investment in such securities.

Additional risks, if any, specific to particular securities issued under this prospectus will be detailed in the applicable prospectus supplements.

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USE OF PROCEEDS

Unless we specify otherwise in any prospectus supplement, we intend to use the net proceeds from the sale of the securities offered by this prospectus for capital expenditures, working capital, to make vessel, other asset or share acquisitions, to fund the construction of newbuild vessels or for other general corporate purposes, or a combination thereof. Vessel acquisitions may be structured as individual assets purchases, the acquisition of the equity interests of vessel owning entities or the acquisition of the equity interests of the direct or indirect owner of one or more vessels or shipping assets or the acquisition, in whole or in part, of private or listed entities that are engaged in maritime transportation services.

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CAPITALIZATION

The following table sets forth our capitalization as of December 31, 2024. The table presents information:

• on an actual basis; and

• on an as adjusted basis to give effect to the (1) issuance of (i) 2,386,731 common shares, par value $0.001 per share, (ii) 2,000,000 Series A Preferred Shares, par value $0.001 per share, and (iii) 40,000 Series B Preferred Shares, par value $0.001 per share and (2) the contribution to us by Toro Corp. of $10,356,450 in cash, each in connection with our spin off from Toro Corp on April 14, 2025.

(All figures in U.S. dollars)			Actual As of December 31, 2024			As Adjusted As of December 31, 2024
Mezzanine equity:
Series A Preferred Shares(1)			$—			$20,000,000
Parent company equity/ Shareholders Equity:
Net parent investment			$21,111,822			$—
Capital Stock			—			2,387
Series B Preferred Shares			—			40
Additional paid-in capital			—			11,465,845
Retained earnings			—			—
Total parent company equity/ Shareholders Equity			$21,111,822			$11,468,272
Total Capitalization			$21,111,822			$31,468,272

(1)
Series A Preferred shares are presented at fair value as determined by management in consideration of a number of data points, including a valuation performed by an independent third-party consulting firm. The valuation methodology applied comprised the bifurcation of the value of the Series A Preferred Shares in two components namely, the “straight” preferred stock component and the option component. The mean of the sum of the two components was used to estimate the value for the Series A Preferred Shares at $20 million. The valuation methodology and the significant unobservable inputs used for each component are set out below:

				Valuation Technique			Unobservable Input			Range (Weighted average)
	“Straight” Preferred stock component			Discounted Cash Flow model			•  Weighted average cost of Capital			10.55%
	Option Component			Black Scholes			• Volatility • Risk free rate •  Weighted average cost of Capital •  Strike price			114.48% 4.30% 10.55% $10

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DESCRIPTION OF CAPITAL STOCK

A description of our common shares (including the associated Preferred Share Purchase Rights under our Shareholder Protection Rights Agreement) can be found under the heading “Additional Information” in our Annual Report and in Exhibit 2.1 to our Annual Report under the heading “Description of Securities Registered Under Section 12 of the Securities Exchange Act of 1934 - Description of our Common Shares” and “Description of Securities Registered Under Section 12 of the Securities Exchange Act of 1934 - Description of the Rights under the Stockholders Rights Agreement”, which descriptions are incorporated by reference herein. A description of our 1.00% Series A Fixed Rate Cumulative Perpetual Convertible Preferred Shares, Series B Preferred Shares and Series C Participating Preferred Shares can be found under the heading “Additional Information” in our Annual Report, which descriptions are incorporated by reference herein.

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DESCRIPTION OF DEBT SECURITIES

We may offer and issue debt securities from time to time in one or more series, under an indenture, to be entered into between us and the trustee (to be named in a prospectus supplement), the form of which is filed as an exhibit to the registration statement of which this prospectus forms a part.

The following describes the general terms that will apply to any debt securities that we may offer pursuant to this prospectus. The terms and provisions of any debt securities that we offer may differ from the terms described below, and may not be subject to or contain any or all of the terms described below. The specific terms and provisions of the debt securities, and the extent to which the general terms of the debt securities described in this prospectus apply to those debt securities, will be set forth in the applicable prospectus supplement. This description will include, where applicable:

• the designation, aggregate principal amount and authorized denominations of such debt securities;

• the issue price, expressed as a percentage of the aggregate principal amount of such debt securities;

• the maturity date or dates of such debt securities;

• the interest rate per annum, if any of such debt securities;

• if the debt securities provide for interest payments, the date from which interest will accrue, the dates on which interest will be payable, the date on which payment of interest will commence and the regular record dates for interest payment dates;

• any optional or mandatory sinking fund provisions or exchangeability provisions;

• the terms and conditions upon which conversion of any convertible debt securities may be effected, including the conversion price, the conversion period and other conversion provisions;

• whether the debt securities will be our senior or subordinated securities;

• whether the debt securities will be our secured or unsecured obligations;

• the applicability and terms of any guarantees;

• the date, if any, after which and the price or prices at which the debt securities may be optionally redeemed or must be mandatorily redeemed and any other terms and provisions of optional or mandatory redemptions;

• the denominations in which the debt securities of the series will be issuable;

• the portion of the principal amount of the debt securities of the series which will be payable upon acceleration or provable in bankruptcy;

• any events of default;

• the currency or currencies, including composite currencies, in which principal, premium and interest will be payable, if other than the currency of the United States of America;

• if principal, premium or interest is payable, at our election or at the election of any holder, in a currency other than that in which the debt securities of the series are stated to be payable, the period or periods within which, and the terms and conditions upon which, the election may be made;

• whether interest will be payable in cash or additional securities at our or the holder’s option and the terms and conditions upon which the election may be made;

• if denominated in a currency or currencies other than the currency of the United States of America, the equivalent price in the currency of the United States of America for purposes of determining the voting rights of holders of those debt securities under the applicable indenture;

• if the amount of payments of principal, premium or interest may be determined with reference to an index, formula or other method based on a coin or currency other than that in which the debt securities of the series are stated to be payable, the manner in which the amounts will be determined;

• any restrictive covenants or other material terms relating to the debt securities;

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• whether the debt securities will be issued in the form of global securities or certificates in registered form;

• any listing on any securities exchange or quotation system;

• any agents for the debt securities, including trustees, depositaries, authenticating or paying agents, transfer agents or registrars;

• any applicable selling restrictions;

• additional provisions, if any, related to defeasance and discharge of the debt securities; and

• any other special features of the debt securities.

Each series of debt securities may be issued at various times with different maturity dates, may bear interest at different rates and may otherwise vary. We will provide you with information on any material Marshall Islands and U.S. federal income tax considerations and other special considerations applicable to any debt securities in the applicable prospectus supplement.

The description in the applicable prospectus supplement of any debt securities the Company offers will not necessarily be complete and will be qualified in its entirety by reference to the indenture and any applicable supplemental indenture, which will be filed with the SEC if we offer any debt securities. You should read the indenture, any applicable supplemental indenture and any applicable prospectus supplement in their entirety.

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DESCRIPTION OF WARRANTS

We may offer and issue warrants to purchase any of our debt or equity securities, which will be specified in the applicable prospectus supplement. Warrants may be issued independently or together with any other securities and may be attached to, or separate from, such securities. The terms of any warrants to be issued and a description of the material provisions of any applicable warrant agreement will be set forth in the applicable prospectus supplement. We expect that such terms will include, among others:

• the title of such warrants;

• the aggregate number of such warrants;

• the price or prices at which such warrants will be issued;

• the number and type of our securities purchasable upon exercise of such warrants;

• the price at which our securities purchasable upon exercise of such warrants may be purchased;

• the date on which the right to exercise such warrants shall commence and the date on which such right shall expire;

• if applicable, the minimum or maximum amount of such warrants which may be exercised at any one time;

• if applicable, the designation and terms of the securities with which such warrants are issued and the number of such warrants issued with each such security;

• if applicable, the date on and after which such warrants and the related securities will be separately transferable;

• information with respect to book-entry procedures, if any;

• the currency or currencies, in which the price of such warrants will be payable;

• if applicable, a discussion of any material Marshall Islands and U.S. federal income tax considerations; and

• any other terms of such warrants, including terms, procedures and limitations relating to the exchange and exercise of such warrants.

The description in the applicable prospectus supplement of any warrants we offer will not necessarily be complete and will be qualified in its entirety by reference to the applicable warrant agreement, which will be filed with the SEC if we offer warrants. You should read the applicable warrant agreement and any applicable prospectus supplement in their entirety.

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DESCRIPTION OF PURCHASE CONTRACTS

We may offer and issue purchase contracts for the purchase or sale of any of our debt or equity securities issued by us, which will be specified in the applicable prospectus supplement.

Each purchase contract will entitle the holder thereof to purchase or sell, and obligate us to sell or purchase, on specified dates, such securities at a specified purchase price, which may be based on a formula, all as set forth in the applicable prospectus supplement. The applicable prospectus supplement will also specify the methods by which the holders may purchase or sell such securities and any acceleration, cancellation or termination provisions, provisions relating to material Marshall Islands and U.S. federal income tax considerations, if any, or other provisions relating to the settlement of a purchase contract.

The purchase contracts may require us to make periodic payments to the holders thereof or vice versa, which payments may be deferred to the extent set forth in the applicable prospectus supplement, and those payments may be unsecured or pre-funded on some basis. The purchase contracts may require the holders thereof to secure their obligations in a specified manner to be described in the applicable prospectus supplement. Alternatively, purchase contracts may require holders to satisfy their obligations thereunder when the purchase contracts are issued. Our obligation to settle such pre-paid purchase contracts on the relevant settlement date may constitute indebtedness. Accordingly, pre-paid purchase contracts will be issued under either the senior indenture or the subordinated indenture.

The applicable prospectus supplement relating to any purchase contracts we offer will specify the material terms of the purchase contracts and whether they will be issued separately or as part of units. The description in the applicable prospectus supplement of any purchase contracts we offer will not necessarily be complete and will be qualified in its entirety by reference to the applicable purchase contract agreement, a form of which will be filed with the SEC if we offer purchase contracts. You should read the applicable purchase contract agreement and any applicable prospectus supplement in their entirety.

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DESCRIPTION OF RIGHTS

We may issue rights to purchase our equity securities, which will be specified in the applicable prospectus supplement. These rights may be issued independently or together with any other security offered by this prospectus and may or may not be transferable by the shareholder receiving the rights in the rights offering. In connection with any rights offering, we may enter into a standby purchase or underwriting agreement with one or more purchasers or underwriters pursuant to which such persons will purchase any securities that remain unsubscribed for upon completion of the rights offering.

The applicable prospectus supplement relating to any rights will describe the terms of the offered rights, including, where applicable, the following:

• the exercise price for the rights;

• the number of rights issued to each shareholder;

• the extent to which the rights are transferable;

• any other terms of the rights, including terms, procedures and limitations relating to the exchange and exercise of the rights;

• the date on which the right to exercise the rights will commence and the date on which the right will expire;

• the amount of rights outstanding;

• the extent to which the rights include an over-subscription privilege with respect to unsubscribed securities; and

• the material terms of any standby underwriting arrangement entered into by us in connection with the rights offering.

The description in the applicable prospectus supplement of any rights we offer will not necessarily be complete and will be qualified in its entirety by reference to the applicable rights certificate or rights agreement, which will be filed with the SEC if we offer rights. You should read the applicable rights certificate, the applicable rights agreement and any applicable prospectus supplement in their entirety.

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DESCRIPTION OF UNITS

We may issue units consisting of one or more rights, purchase contracts, warrants, debt securities, preferred shares, common shares or any combination of such securities, which will be specified in the applicable prospectus supplement. The applicable prospectus supplement will describe the terms of the offered units. We expect that such terms will include, among others:

• the terms of the units and of the rights, purchase contracts, warrants, debt securities, preferred shares and common shares comprising the units, including whether and under what circumstances the securities comprising the units may be traded separately;

• a description of the terms of any unit agreement governing the units;

• if applicable, a discussion of any material Marshall Islands and U.S. federal income tax considerations; and

• a description of the provisions for the payment, settlement, transfer or exchange of the units.

The description in the applicable prospectus supplement of any units we offer will not necessarily be complete and will be qualified in its entirety by reference to the applicable unit agreement, a form of which will be filed with the SEC if we offer units. You should read the applicable unit agreement and any applicable prospectus supplement in their entirety.

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PLAN OF DISTRIBUTION

We may sell or distribute the securities included in this prospectus through underwriters, whether individually or through an underwriting syndicate led by one or more managing underwriters, through agents, to dealers and/or directly to one or more purchasers. We may sell the securities from time to time at fixed prices, market prices prevailing at the time of sale, prices related to the prevailing market prices, varying prices determined at the time of sale or negotiated prices.

In addition, we may sell some or all of the securities included in this prospectus, in one or more transactions, through:

• a block trade in which a broker-dealer may resell a portion of the block, as principal, in order to facilitate the transaction;

• purchases by a broker-dealer, as principal, and resale by the broker-dealer for its account;

• ordinary brokerage transactions and transactions in which a broker solicits purchasers; or

• trading plans entered into by us pursuant to Rule 10b5-1 under the Exchange Act that are in place at the time of an offering pursuant to this prospectus and any applicable prospectus supplement that provide for periodic sales of our securities on the basis of parameters described in such trading plans.

• In addition, we may enter into options or other types of transactions that require us to deliver our securities to a broker-dealer, who will then resell or transfer the securities under this prospectus.

• We may enter into hedging transactions with respect to our securities. For example, we may:

• enter into transactions involving short sales of our common shares by broker-dealers;

• sell common shares short and deliver the shares to close out short positions; or

• loan or pledge the common shares to a broker-dealer, who may sell the loaned shares or, in the event of default, sell the pledged shares.

We may enter into derivative transactions with third parties, or sell securities not covered by this prospectus to third parties in privately negotiated transactions. If the applicable prospectus supplement indicates, in connection with those derivatives, the third parties may sell securities covered by this prospectus and the applicable prospectus supplement, including in short sale transactions. If so, the third party may use securities pledged by us, or borrowed from us to settle those sales or to close out any related open borrowings of stock and may use securities received from us in settlement of those derivatives to close out any related open borrowings of stock.

Offers to purchase the securities being offered by this prospectus may be solicited directly. Agents may also be designated to solicit offers to purchase the securities from time to time. Any agent involved in the offer or sale of our securities will be identified in a prospectus supplement. We reserve the right to accept and, from time to time, to reject, in whole or in part, any proposed purchase of securities to be made directly or through agents.

Underwriters or agents could make sales in privately negotiated transactions and/or any other method permitted by law, including sales deemed to be an at-the-market offering as defined in Rule 415 promulgated under the Securities Act, which includes sales made directly on or through the Nasdaq, the existing trading market for our common shares, or sales made to or through a market maker other than on an exchange. Each time that we sell securities covered by this prospectus, we will provide a prospectus supplement or supplements that will describe the method of distribution and set forth the terms and conditions of the offering of such securities, including the offering price of the securities, the proceeds to us, any underwriting discounts or commissions and other items constituting underwriters’ compensation. Unless otherwise set forth in an applicable prospectus supplement, the obligations of underwriters or dealers to purchase the securities will be subject to certain conditions precedent and the underwriters or dealers will be obligated to purchase all the securities if any are purchased.

Any initial public offering price and any discounts or concessions allowed or re-allowed or paid to dealers may be changed from time to time. We may grant to the underwriters options to purchase additional offered securities to cover over-allotments, if any, at the public offering price, with additional underwriting discounts or commissions and on terms as may be set forth in the applicable prospectus supplement. Underwriters, dealers

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and agents that participate in the distribution of the securities may be underwriters as defined in the Securities Act, and any discounts or commissions received by them from us and any profit on the resale of the securities by them may be treated as underwriting discounts and commissions under the Securities Act.

We may have agreements with underwriters, dealers and agents to indemnify them against some civil liabilities, including liabilities under the Securities Act, to contribute to payments which the underwriters, dealers or agents may be required to make or to reimburse those persons for certain expenses. The specific terms of any lock-up provisions in respect of any given offering will be described in the applicable prospectus supplement.

Underwriters, dealers and agents may engage in transactions with, or perform services for, us or our subsidiaries in the ordinary course of their businesses.

Any underwriters to whom securities are sold by us for public offering and sale may make a market in such securities, but such underwriters will not be obligated to do so and may discontinue any market making at any time without notice. No assurance can be given as to the liquidity of the trading market for any securities.

Certain persons participating in any offering of securities may engage in transactions that stabilize, maintain or otherwise affect the price of the securities offered. In connection with any such offering, the underwriters or agents, as the case may be, may purchase and sell securities in the open market. These transactions may include over-allotment and stabilizing transactions and purchases to cover syndicate short positions created in connection with the offering. Stabilizing transactions consist of certain bids or purchases for the purpose of preventing or retarding a decline in the market price of the securities and syndicate short positions involve the sale by the underwriters or agents, as the case may be, of a greater number of securities than they are required to purchase from us in the offering. The underwriters may also impose a penalty bid, whereby selling concessions allowed to syndicate members or other broker-dealers for the securities sold for their account may be reclaimed by the syndicate if such securities are repurchased by the syndicate in stabilizing or covering transactions. These activities may stabilize, maintain or otherwise affect the market price of the securities, which may be higher than the price that might otherwise prevail in the open market, and if commenced, may be discontinued at any time. These transactions may be effected on the Nasdaq, in the over-the-counter market or otherwise. These activities will be described in more detail in the applicable prospectus supplement.

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TAX CONSIDERATIONS

You should carefully read the discussion of the material Marshall Islands and U.S. federal income tax considerations associated with our operations and the acquisition, ownership and disposition of our common shares set forth in the section entitled “Item 10. Additional Information E. Taxation” of our Annual Report, incorporated by reference herein, as updated by annual and other reports and documents we file with the SEC after the date of this prospectus and that are incorporated by reference herein.

We will provide you with information on any material Marshall Islands and U.S. federal income tax considerations applicable to any other securities in the applicable prospectus supplement.

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EXPENSES

The following are the estimated expenses, other than any underwriting discounts and commissions and expenses reimbursed by us, of the issuance and distribution of the securities being registered under the registration statement of which this prospectus forms a part, all of which have been or will be paid by us.

SEC registration fee			$38,275
FINRA filing fee			$*
Legal fees and expenses			$*
Accounting fees and expenses			$*
Miscellaneous			$*
Total			$*

*
To be provided in a prospectus supplement or as an exhibit to a report on Form 6-K that is incorporated by reference.

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VALIDITY OF SECURITIES

The validity of the securities offered by this prospectus will be passed upon for us by Goodwin Procter LLP with respect to matters of New York law, and by Seward & Kissel LLP with respect to matters of Marshall Islands law.

EXPERTS

The combined carve-out financial statements of Robin Energy Ltd. Predecessor as of December 31, 2023 and 2024, and for each of the years ended December 31, 2022, 2023 and 2024, incorporated by reference in this prospectus by reference to Robin Energy Ltd.’s annual report on Form 20-F for the year ended December 31, 2024 have been audited by Deloitte Certified Public Accountants, S.A., an independent registered public accounting firm, as stated in their report. Such financial statements are incorporated by reference in reliance upon the report of such firm given upon their authority as experts in accounting and auditing.

The consolidated financial statements of Robin Energy Ltd., as of December 31, 2024, and for the period September 24, 2024 to December 31, 2024, incorporated by reference in this prospectus by reference to Robin Energy Ltd.’s annual report on Form 20-F for the year ended December 31, 2024 have been audited by Deloitte Certified Public Accountants, S.A., an independent registered public accounting firm, as stated in their report. Such financial statements are incorporated by reference in reliance upon the report of such firm given upon their authority as experts in accounting and auditing.

The office of Deloitte Certified Public Accountants, S.A. is located at Fragoklissias 3a & Granikou Street, Maroussi, Athens 151 25, Greece.

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ENFORCEABILITY OF CERTAIN CIVIL LIABILITIES

We are incorporated under the laws of the Republic of the Marshall Islands, and substantially all of our assets are located outside of the United States. Our principal executive office is located in Cyprus. In addition, the majority of our directors and officers are non-residents of the United States, and substantially all of their assets are located outside the United States. As a result, it may be difficult or impossible for you to effect service of process within the United States upon such persons or to bring an action against us or against these individuals in the United States if you believe that your rights have been infringed under securities laws or otherwise. Even if you are successful in bringing an action of this kind, the laws of the Republic of the Marshall Islands and of other jurisdictions may prevent or restrict you from enforcing a judgment against our assets or our directors and officers. Although you may bring an original action against us or our affiliates in the courts of the Marshall Islands, and the courts of the Marshall Islands may impose civil liability, including monetary damages, against us or our affiliates for a cause of action arising under Marshall Islands law, it may be impracticable for you to do so.

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1,020,000 Common Shares

Robin Energy Ltd.

PROSPECTUS

Maxim Group LLC

June 24, 2025

FAQ

What is the size and price of RBNE's new share offering in June 2025?

RBNE is offering 1,020,000 common shares at $3.50 per share to institutional investors, for a total offering value of $3,570,000. The placement agent Maxim Group LLC will receive a 7.0% fee, resulting in net proceeds to the company of approximately $3,320,100 before expenses.

What was RBNE's stock price and market value as of June 2025?

As of June 24, 2025, RBNE's closing price on Nasdaq was $4.85 per share. The aggregate market value of outstanding common shares held by non-affiliates was $51,496,564, based on 3,678,326 shares and a price of $14.00 per share as of June 13, 2025.

How much has RBNE raised in the past 12 months through securities offerings?

During the 12 calendar months prior to June 2025, RBNE has sold $13,587,000 in securities pursuant to General Instruction I.B.5 of Form F-3. The company is limited to selling securities valued at no more than one-third of their public float in any 12-month period while their public float remains below $75 million.

When will RBNE's new shares be delivered to investors?

RBNE expects to deliver the newly offered common shares to investors on or about June 25, 2025, subject to customary closing conditions. The shares are being placed through Maxim Group LLC as the exclusive Placement Agent.

What are the key risk factors mentioned in RBNE's offering?

Key risks mentioned include effects of the spin-off from Toro Corp, challenges as a new entrant to product tanker shipping, market volatility in charter rates, vessel values, and global economic conditions, potential difficulties in securing financing, and geopolitical risks including conflicts in Ukraine and maritime incidents in the Red Sea.