Rubico to begin quarterly earnings updates in 2026

Rhea-AI Filing Summary

Rubico Inc. (RUBI), a Marshall Islands–incorporated shipowner based in Athens, will shift from semi-annual to quarterly earnings reporting, starting with results for the third quarter and nine months ended September 30, 2026, expected to be released in the fourth quarter of 2026. Each quarterly release will provide unaudited condensed statements of operations, balance sheet and summarized cash flows, plus selected operating data, but will not include notes. As a foreign private issuer, Rubico will continue furnishing unaudited interim condensed consolidated financial statements with notes on a semi-annual basis and filing audited annual consolidated financials on Form 20-F. Rubico operates two 157,000 dwt Suezmax tankers, owns two 47,499 dwt MR tanker newbuildings for 2029 delivery and a 60-meter megayacht newbuilding scheduled for second quarter 2027, which it intends to divest, and has agreed to acquire a shipowning company with one 47,499 dwt MR tanker newbuilding due in second quarter 2029.

Key Figures

Quarterly reporting start period: Third quarter and nine months ended September 30, 2026 Suezmax tankers owned: 2 vessels Suezmax tanker size: 157,000 dwt +4 more

7 metrics

Quarterly reporting start period Third quarter and nine months ended September 30, 2026 First period for which Rubico will issue quarterly earnings releases

Suezmax tankers owned 2 vessels Modern, fuel efficient, eco 157,000 dwt Suezmax tankers owned by Rubico

Suezmax tanker size 157,000 dwt Deadweight tonnage of each Suezmax tanker owned by Rubico

MR tanker newbuildings owned 2 vessels 47,499 dwt MR tanker newbuildings scheduled for 2029 delivery

MR tanker newbuilding size 47,499 dwt Deadweight tonnage of each MR tanker newbuilding referenced

Megayacht length 60 meters Length of megayacht newbuilding Rubico intends to divest, delivering in Q2 2027

Expected acquisition closing date By September 30, 2026 Target closing for share purchase agreement for a shipowning company with one MR tanker newbuilding

Key Terms

foreign private issuer, unaudited interim condensed consolidated financial statements, Form 20-F, Nasdaq Capital Market, +1 more

5 terms

foreign private issuer regulatory

"As a foreign private issuer, the Company will continue to furnish"

A foreign private issuer is a company organized outside the United States that meets tests showing it is primarily foreign-controlled and therefore qualifies for a different set of U.S. reporting rules. For investors, that means the company files less frequent or differently formatted disclosures with U.S. regulators and may follow home-country accounting and governance practices, so buying its stock is like dining at a well-reviewed restaurant that follows its home kitchen’s rules instead of the local menu — you get access but should check what standards apply.

unaudited interim condensed consolidated financial statements financial

"continue to furnish to the U.S. Securities and Exchange Commission unaudited interim condensed"

Form 20-F regulatory

"and to file audited annual consolidated financial statements with its annual report on Form 20-F"

Form 20-F is the standardized annual disclosure that non-U.S. companies must file with the U.S. securities regulator when their shares are traded in the U.S.; it contains audited financial statements, a plain-language description of the business, management discussion, governance details and key risk factors. It matters to investors because it provides a consistent, comparable company “report card” and rulebook, helping buyers assess financial health, governance and risks before investing.

Nasdaq Capital Market financial

"The Company’s common shares trade on the Nasdaq Capital Market under the symbol"

The Nasdaq Capital Market is a platform where smaller, emerging companies can list their shares for trading by investors. It provides these companies with access to funding and visibility, helping them grow, much like a local marketplace where new vendors can introduce their products to potential customers. For investors, it offers opportunities to discover early-stage companies with growth potential.

Suezmax tankers technical

"operator of two modern, fuel efficient, eco 157,000 dwt Suezmax tankers"

Suezmax tankers are a class of crude oil ships sized to be the largest vessels that can pass through the Suez Canal when fully loaded. Think of them like the biggest truck that can still fit under a low bridge—large enough to carry a lot of oil but constrained by a key route. Investors watch them because their availability and operating costs help set shipping capacity and freight rates, which influence oil prices, energy company margins, and shipping company cash flow.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What reporting change did Rubico Inc. (RUBI) announce in this Form 6-K?

Rubico Inc. announced it will move from semi-annual to quarterly earnings reporting, beginning with results for the third quarter and nine months ended September 30, 2026, which it expects to release during the fourth quarter of 2026.

Will Rubico Inc. (RUBI) still file semi-annual and annual financial statements with the SEC?

Yes. As a foreign private issuer, Rubico will continue to furnish unaudited interim condensed consolidated financial statements with notes on a semi-annual basis and file audited annual consolidated financial statements with its annual report on Form 20-F.

What will be included in Rubico Inc.’s new quarterly earnings releases?

Each quarterly earnings release will include unaudited condensed financial statements: a statement of operations for the quarterly and year-to-date periods, a balance sheet as of period end, a summarized cash flow statement, and selected operating data and operational updates, but no accompanying notes to the financial statements.

What vessels does Rubico Inc. (RUBI) currently own and have on order?

Rubico owns two 157,000 dwt Suezmax tankers, two 47,499 dwt MR tanker newbuildings scheduled for delivery in the third and fourth quarters of 2029, and a 60-meter megayacht newbuilding scheduled for delivery in the second quarter of 2027, which it intends to divest.

What acquisition agreement did Rubico Inc. (RUBI) disclose?

Rubico has entered into a share purchase agreement to acquire a shipowning company that owns one 47,499 dwt MR tanker newbuilding scheduled for delivery in the second quarter of 2029, with closing expected to occur by September 30, 2026.

On which market are Rubico Inc. (RUBI) shares traded and where is the company based?

Rubico’s common shares trade on the Nasdaq Capital Market under the symbol “RUBI”. The company is incorporated in the Republic of the Marshall Islands and has executive offices in Athens, Greece.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/21/2026 - 04:11 PM Accepted by SEC EDGAR 09/21/2026 - 04:10 PM Learn about SEC filing dates

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of September 2026

Commission File Number: 001-42684

Rubico Inc.
(Translation of registrant's name into English)

20 Iouliou Kaisara Str
19002, Paiania
Athens - Greece
(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.
Form 20-F [ X ]      Form 40-F [   ]

On September 21, 2026, the Registrant issued a press release, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Exhibit 99.1. Press release dated September 21, 2026.

The information contained in this Report is hereby incorporated by reference into the Registrant’s registration statement on Form F-3 (File No. 333-297207).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		Rubico Inc.
		(Registrant)
Date: September 21, 2026		/s/ Nikolaos Papastratis
		Nikolaos Papastratis
		Chief Financial Officer

EXHIBIT 99.1

Rubico Announces Transition to Quarterly Reporting of Financial Results

ATHENS, Greece, Sept. 21, 2026 (GLOBE NEWSWIRE) -- Rubico Inc. (Nasdaq: RUBI) (the “Company” or “Rubico”), a global provider of shipping transportation services specializing in the ownership of vessels, announced today that it will transition from semi-annual to quarterly reporting of its financial results, beginning with the announcement of its results for the third quarter and nine months ended September 30, 2026, which the Company expects to release during the fourth quarter of 2026.

Each quarterly earnings release will include unaudited condensed financial statements, comprising a statement of operations for the relevant quarterly and year-to-date periods, a balance sheet as of the end of the relevant period and a summarized statement of cash flows for the relevant quarterly and year-to-date periods, together with selected operating data and operational updates. The quarterly earnings releases will not include accompanying notes to the financial statements. As a foreign private issuer, the Company will continue to furnish to the U.S. Securities and Exchange Commission unaudited interim condensed consolidated financial statements with accompanying notes on a semi-annual basis, and to file audited annual consolidated financial statements with its annual report on Form 20-F.

The transition to quarterly earnings reporting reflects the Company’s commitment to enhanced transparency and more frequent communication with the investment community, and aligns the frequency of the Company’s reporting with that of many of its listed peers.

About the Company

Rubico Inc. is a global provider of shipping transportation services specializing in the ownership of vessels. The Company is an international owner and operator of two modern, fuel efficient, eco 157,000 dwt Suezmax tankers. Furthermore, the Company owns two 47,499 dwt MR tanker newbuildings scheduled for delivery in the third and fourth quarters of 2029 and a 60-meter newbuilding megayacht scheduled for delivery in the second quarter of 2027, which the Company intends to divest. In addition, the Company has entered into a share purchase agreement to acquire a shipowning company that owns one high-specification 47,499 dwt MR tanker newbuilding scheduled for delivery in the second quarter of 2029, with closing of this share purchase agreement to occur by September 30, 2026.

The Company is incorporated under the laws of the Republic of the Marshall Islands and has executive offices in Athens, Greece. The Company’s common shares trade on the Nasdaq Capital Market under the symbol “RUBI”.

Please visit the Company’s website at: https://rubicoinc.com/

For further information please contact:

Nikolaos Papastratis
Chief Financial Officer
Rubico Inc.
Tel: +30 210 812 8107
Email: npapastratis@rubicoinc.com

Forward-Looking Statements

Matters discussed in this press release may constitute forward-looking statements. The Private Securities Litigation Reform Act of 1995 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 other than statements of historical facts, including statements regarding the timing, frequency and content of the Company’s future financial reporting and earnings releases.

The Company desires to take advantage of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 and is including this cautionary statement in connection with this safe harbor legislation. The words “believe,” “anticipate,” “intends,” “estimate,” “forecast,” “project,” “plan,” “potential,” “may,” “should,” “expect,” “pending” and similar expressions identify forward-looking statements. The forward-looking statements in this press release are based upon various assumptions, many of which are based, in turn, upon further assumptions, including without limitation, our 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 expectations, beliefs or projections. Please see the Company’s filings with the Securities and Exchange Commission for a more complete discussion of these and other risks and uncertainties. The information set forth herein speaks only as of the date hereof, and the Company disclaims any intention or obligation to update any forward-looking statements as a result of developments occurring after the date of this communication.

Filing Exhibits & Attachments

1 document

Press Releases

• EX-99.1 PRESS RELEASE 6.0 KB