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Nanobiotix (NASDAQ: NBTX) raises $100M, extending funding runway into 2029

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
6-K

Rhea-AI Filing Summary

Nanobiotix has closed a global equity offering raising aggregate gross proceeds of about $100 million (approximately €86.1 million). The financing comprised 2,218,467 new ordinary shares, including ADSs and Additional ADSs, and 345,099 pre-funded warrants.

The subscription price was €33.60 per ordinary share, equal to an ADS offering price of $38.98, reflecting a 14.92% discount to the recent volume-weighted average share price. Net proceeds are earmarked mainly to advance Nanoprimer and other platforms, support JNJ-1900 (NBTXR3), and for general corporate purposes, and are expected to fund operations into 2029.

Positive

  • Raised approximately $100 million in gross proceeds, providing substantial new capital to support clinical and platform development.
  • Runway extended into 2029, as the company believes proceeds from the Global Offering plus existing cash will cover working capital needs into that timeframe.

Negative

  • None.

Insights

$100M raise strengthens Nanobiotix’s cash runway into 2029.

Nanobiotix completed a global equity offering totaling 2,218,467 ordinary shares and 345,099 pre-funded warrants, generating gross proceeds of about $100 million. Pricing at €33.60 per share ($38.98 per ADS) came at a 14.92% discount to the recent VWAP.

The company plans to allocate between 50-60% of net proceeds to its Nanoprimer and other platforms, less than 10% to JNJ-1900 (NBTXR3), and 30-40% to general corporate purposes. Management indicates this capital, combined with existing cash, should support operations into 2029.

This is a sizable financing for a late-stage oncology biotech and materially extends liquidity. Actual impact will depend on execution of clinical programs funded by the raise and on how efficiently the new capital is deployed across platforms.

Gross proceeds $100 million (≈€86.1 million) Aggregate gross proceeds from Global Offering
Ordinary shares issued 2,218,467 shares Total new ordinary shares in Global Offering
Pre-funded warrants issued 345,099 PFW Pre-funded warrants, each for one ordinary share
Share subscription price €33.60 per ordinary share Subscription price in Global Offering
ADS offering price $38.98 per ADS ADS price based on €1.00 = $1.16 exchange rate
Discount to VWAP 14.92% Discount vs 3-day volume-weighted average price
Use for Nanoprimer and platforms 50-60% of net proceeds Allocation of net proceeds
Runway horizon Into 2029 Expected funding of operations with proceeds and cash
pre-funded warrants financial
"and pre-funded warrants to subscribe for one Ordinary Share each (the “PFW”) issued in the Global Offering"
Pre-funded warrants are financial instruments that give investors the right to purchase a company's stock at a set price, but with most or all of the purchase price paid upfront. They function like a coupon or gift card for stock, allowing investors to buy shares later at a fixed price, which can be beneficial if they want to avoid future price increases. This makes them important for investors seeking flexibility and certainty in their investment plans.
Global Offering financial
"announces the closing today (the “Closing”) of its global offering (the “Global Offering”)"
A global offering is when a company sells its shares or other securities to investors in multiple countries at the same time, combining new shares and sometimes existing ones. It matters to investors because it can change how many shares are available, affect the stock’s price and liquidity, and bring in capital or let insiders cash out—much like a concert releasing tickets worldwide at once, expanding the buyer pool and influencing demand and resale value.
American Depositary Shares financial
"Ordinary Shares in the form of American Depositary Shares (“ADSs”) and 33,805 Ordinary Shares in the form of Additional ADSs"
American depositary shares (ADSs) are a way for investors in the United States to buy shares of foreign companies without dealing with international markets directly. They represent ownership in a foreign company's stock and are traded on U.S. stock exchanges, making it easier for American investors to buy, sell, and own parts of companies from around the world.
Prospectus Regulation regulatory
"pursuant to the Regulation (EU) 2017/1129, as amended (the “Prospectus Regulation”)"
A set of laws and rules that require companies to prepare and publish a prospectus — a detailed document about an offering of stocks, bonds or other securities — so potential buyers can see key facts like business plans, risks and financial numbers. Think of it as a product label for an investment: it helps investors compare offers, avoid surprises and make informed choices, and it also affects how and when companies can raise money.
MiFID II regulatory
"each as defined in Directive 2014/65/EU, as amended (“MiFID II”)"
MiFID II is a set of rules in Europe that aims to make financial markets more transparent and fair. It requires banks and investment firms to clearly explain their services and costs to clients, helping people make better-informed decisions when investing their money.
qualified investors financial
"reserved to “qualified investors”, as that term is defined in Article 2(e) of the Prospectus Regulation"
Qualified investors are individuals or institutions that meet regulatory standards—such as a minimum income, net worth, or professional expertise—allowing them access to investment opportunities not open to the general public. Think of them as a financial "VIP" group: they can buy private deals, complex products, or early-stage securities that may offer higher returns but also carry greater risk and less public information, so their status matters because it changes what investments are available and what protections apply.
Offering Type shelf
Use of Proceeds Advance Nanoprimer and other platforms, support JNJ-1900 (NBTXR3), and general corporate purposes
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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 May 2026

Commission File Number: 001-39777

Nanobiotix S.A.
(Translation of registrant's name into English)

60 Rue de Wattignies 75012 Paris, France
(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 May 26, 2026, the Registrant issued a press release, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

(c) Exhibit 99.1. Press release dated May 26, 2026


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.

      Nanobiotix S.A.    
  (Registrant)
   
  
Date: May 26, 2026     /s/ Bart Van Rhijn    
  Bart Van Rhijn
  Chief Financial Officer
  

EXHIBIT 99.1

NANOBIOTIX Announces Closing of Global Offering

PARIS and CAMBRIDGE, Mass., May 26, 2026 (GLOBE NEWSWIRE) -- NANOBIOTIX (Euronext: NANO – NASDAQ: NBTX – “Nanobiotix” or the “Company”), a late-clinical stage biotechnology company pioneering physics-based approaches to expand treatment possibilities for patients with cancer and other major diseases, announces the closing today (the “Closing”) of its global offering (the “Global Offering”), including in respect of the earlier total exercise by the underwriters of their option (the “Option”) to purchase additional new ordinary shares in the form of additional American Depositary Shares (the “Additional ADSs”).

Following the full exercise of the Option, the total number of ordinary shares (each an “Ordinary Share”), of the Company and pre-funded warrants to subscribe for one Ordinary Share each (the “PFW”) issued in the Global Offering amounts to 2,218,467 Ordinary Shares, including 225,373 Ordinary Shares in the form of American Depositary Shares (“ADSs”) and 33,805 Ordinary Shares in the form of Additional ADSs, and 345,099 PFW, resulting in aggregate gross proceeds for the Company of approximately $100 million (corresponding to approximately €86.1 million), before deducting underwriting commissions in respect of the Global Offering and estimated expenses related to the Global Offering.

The subscription price of €33.60 per Ordinary Share, corresponding to the offering price of $38.98 per ADS based on an exchange rate of €1.00 = $1.16 as published by the European Central Bank on May 20, 2026, is equal to the volume weighted average price of the Ordinary Shares on the regulated market of Euronext in Paris over the last three trading sessions preceding the pricing of the Global Offering (i.e. May 18, May 19 and May 20, 2026), less a discount of 14.92% and has been determined by the Company pursuant to the 29th resolution of the Company’s combined shareholders’ meeting held on May 19, 2025. The subscription price of each PFW is equal to the subscription price per Ordinary Share issued in the Global Offering minus their nominal value of €0.03 per Ordinary Share.

The Company intends to use the net proceeds from the Global Offering, including the net proceeds from the sale of the Additional ADSs, as follows:

  • less than 10% to support the development and advancement of JNJ-1900 (NBTXR3);
  • between 50-60% to advance our Nanoprimer and other platforms; and
  • between 30-40% for general corporate purposes.

The expected use of proceeds represents the Company’s intentions based upon its current plans and business conditions. The Company cannot predict with certainty all of the particular uses for the net proceeds to be received upon the completion of Global Offering (including the Additional ADSs) or the amounts that the Company will actually spend on the uses set forth above. The amounts and timing of the Company’s actual expenditures and the extent of clinical development may vary significantly depending on numerous factors, including the progress of the development efforts, the status of and results from preclinical studies and any ongoing clinical trials or clinical trials the Company may commence in the future, as well as any collaborations that the Company may enter into with third parties for its product candidates and any unforeseen cash needs. As a result, the Company’s management will retain broad discretion over the allocation of the net proceeds.

The Company believes that the net proceeds from the Global Offering (including the Additional ADSs), together with its cash and cash equivalents, will be sufficient to meet its working capital requirements for operations into 2029, consistent with the Company’s currently contemplated cash burn rate.

Jefferies, TD Cowen and Stifel acted as global coordinators and joint bookrunners for the Global Offering.

Jefferies LLC, acting as the stabilizing agent on its own behalf and on behalf of the other Underwriters, reported that no stabilization activities had been carried out and the stabilization period is now closed.

The ADSs are listed on the Nasdaq Global Select Market under the symbol “NBTX” and the Company’s Ordinary Shares are listed on Euronext Paris under the symbol “NANO”.

The ADSs (including the Additional ADSs) and Ordinary Shares issued in the Global Offering were offered pursuant to an effective shelf registration statement on Form F-3 (Registration No. 333-285604), which was filed with the Securities and Exchange Commission (the “SEC”) on March 6, 2025 and subsequently declared effective on March 14, 2025. The Global Offering was made only by means of a prospectus and prospectus supplement that form a part of the registration statement. A final prospectus supplement relating to and describing the terms of the Global Offering has been filed with the SEC on May 22, 2026 and is available on the SEC’s website at www.sec.gov. The final prospectus supplement relating to the Global Offering (and accompanying prospectus) relating to the Global Offering may be obtained from Jefferies LLC, Attention: Equity Syndicate Prospectus Department, 520 Madison Avenue, New York, NY 10022, or by telephone at (877) 821-7388 or by email at Prospectus_Department@Jefferies.com; from Stifel, Nicolaus & Company, Incorporated, Attention: Syndicate, One Montgomery Street, Suite 3700, San Francisco, CA 94104, by telephone at (415) 364-2720 or by email at syndprospectus@stifel.com; or from TD Securities (USA) LLC, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, or by email at TDManualrequest@broadridge.com.

The Global Offering is not subject to the preparation of a prospectus requiring an approval by the French Financial Markets Authority (Autorité des marchés financiers – the “AMF”) pursuant to the Regulation (EU) 2017/1129, as amended (the “Prospectus Regulation”), nor to the filing with the AMF of a document containing the information set out in Annex IX of the Prospectus Regulation.

About NANOBIOTIX

Nanobiotix is a late-stage clinical biotechnology company pioneering disruptive, physics-based therapeutic approaches to revolutionize treatment outcomes for millions of patients; supported by people committed to making a difference for humanity. The Company’s philosophy is rooted in the concept of pushing past the boundaries of what is known to expand possibilities for human life.

Incorporated in 2003, Nanobiotix is headquartered in Paris, France and is listed on Euronext since 2012 and on the Nasdaq Global Select Market in New York City since December 2020. The Company has subsidiaries in Cambridge, Massachusetts (United States), amongst other locations.

Nanobiotix is the owner of more than 25 patent families associated with three (3) nanotechnology platforms with applications in 1) oncology; 2) bioavailability and biodistribution; and 3) disorders of the central nervous system.

Contacts

Nanobiotix 


Communications Department
Brandon Owens
VP, Communications
+1 (617) 852-4835
contact@nanobiotix.com



Investor Relations Department
Joanne Choi
VP, Investor Relations (US)
+1 (713) 609-3150

Ricky Bhajun
Director, Investor Relations (EU)

investors@nanobiotix.com 

 
Media Relations 

France – HARDY
Caroline Hardy
+ 33 06 70 33 49 50
carolinehardy@outlook.fr

Global – uncapped Communications
Becky Lauer
+1 (646) 286-0057
uncappednanobiotix@uncappedcommunications.com
 
   

Special Note Regarding Forward-Looking Statements

This press release contains “forward-looking” statements within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995, including, but not limited to, statements regarding the expected closing of the Global Offering, the use of proceed therefrom, and the period of time through which the Company’s anticipates its financial resources will be adequate to support operations. Words such as “expects,” “intends,” “can,” “could,”, “may,” “might,” “plan,” “potential,” “should,” and “will,” or the negative of these and similar expressions are intended to identify forward-looking statements. These forward-looking statements, which are based on our management’s current expectations and assumptions and on information currently available to management. These forward-looking statements involve known and unknown risks, uncertainties and other factors that could cause actual results to differ materially from those implied by the forward-looking statements, including market conditions, statements regarding the expected closing of the Global Offering, the anticipated use of net proceeds therefrom, any announcement of the exercise of the Over-Allotment Option, the period of time through which the Company anticipates its financial resources will be adequate to support its operations, risks related to the satisfaction of closing conditions in the underwriting agreement related to the Global Offering, and risks related to Nanobiotix’s business and financial performance, which include the risk that assumptions underlying the Company’s cash runway projections are not realized. Further information on the risk factors that may affect Company business and financial performance is included in Nanobiotix’s Annual Report on Form 20-F filed with the SEC on March 31, 2026 under “Item 3.D. Risk Factors”, in Nanobiotix’s 2025 universal registration document filed with the AMF) on March 31, 2026, and subsequent filings Nanobiotix makes with the SEC and AMF from time to time, which are available on the SEC’s website at www.sec.gov and on the AMF’s website at www.amf.org. The forward-looking statements included in this press release speak only as of the date of this press release, and except as required by law, Nanobiotix assumes no obligation to update these forward-looking statements publicly.

Disclaimers

This press release does not constitute an offer to sell or the solicitation of an offer to buy any securities of the Company, nor shall there be any sale of such securities, in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

The distribution of this press release may be subject to legal or regulatory restrictions in certain jurisdictions. Any person who comes into possession of this press release must inform him or herself of and comply with any such restrictions.

This document does not constitute an offer to the public in France and the securities referred to in this document can only be offered or sold in France pursuant to article L. 411-2 of the French Monetary and Financial Code to qualified investors (investisseurs qualifiés) acting for their own account as defined in the Prospectus Regulation.

This announcement is an advertisement and not a prospectus within the meaning of the Prospectus Regulation.

The International Offering is reserved to “qualified investors”, as that term is defined in Article 2(e) of the Prospectus Regulation.

In relation to each member state of the European Economic Area other than France (each, a “Relevant Member State”), an offer of the securities referred to herein is not being made and will not be made to the public in that Relevant Member State, other than (i) to any legal entity which is a qualified investor as defined in the Prospectus Regulation, (ii) to fewer than 150 natural or legal persons per Relevant Member State, or (iii) in any other circumstances falling within Article 1(4) of the Prospectus Regulation; provided that no such offer of the securities referred to herein shall require the Company to publish a prospectus pursuant to Article 3 of the Prospectus Regulation. For the purposes of the above, the expression an “offer to the public” in any Relevant Member State shall have the meaning ascribed to it in article 2(d) of the Prospectus Regulation.

This communication is being distributed only to, and is directed only at (a) persons outside the United Kingdom, (b) “qualified investors” (as defined in paragraph 15 of Schedule 1 to the Public Offers and Admissions to Trading Regulations 2024 (the “POAT Regulations”)) who have professional experience in matters relating to investments falling within Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 (the “Order”), and (c) high net worth entities, and other persons to whom it may otherwise lawfully be communicated, falling within Article 49(2) of the Order (all such persons together being referred to as “relevant persons”). In the United Kingdom, any offering of securities described herein will be made pursuant to an exemption under the POAT Regulations from the requirement to publish a prospectus. Any investment or investment activity to which this communication relates is available only to relevant persons and will be engaged in only with relevant persons. Any person who is not a relevant person should not act or rely on this communication or any of its contents.

Solely for the purposes of each manufacturer’s product approval process, the target market assessment in respect of the securities offered in the International Offering has led to the conclusion in relation to the type of clients criteria only that: (i) the type of clients to whom the securities are targeted is eligible counterparties and professional clients only, each as defined in Directive 2014/65/EU, as amended (“MiFID II”); and (ii) all channels for distribution of the securities offered in the International Offering to eligible counterparties and professional clients are appropriate. Any person subsequently offering, selling or recommending the securities (a “distributor”) should take into consideration the manufacturers’ type of clients assessment; however, a distributor subject to MiFID II is responsible for undertaking its own target market assessment in respect of the securities offered in the International Offering (by either adopting or refining the manufacturers’ type of clients assessment) and determining appropriate distribution channels.

This press release has been prepared in both French and English. In the event of any discrepancies between the two versions of the press release, the French language version shall prevail.

Attachment

  • 2026-05-26 -- NBTX -- Closes on Public Offering -- AMF FIling (https://ml.globenewswire.com/Resource/Download/309d93f2-47a1-4219-a76c-18fecfc1a301)

FAQ

What did Nanobiotix (NBTX) announce in its latest Form 6-K?

Nanobiotix announced the closing of a global equity offering, raising about $100 million in gross proceeds. The deal combined new ordinary shares, American Depositary Shares, and pre-funded warrants to strengthen funding for its oncology platforms and general corporate purposes.

How much capital did Nanobiotix (NBTX) raise in the global offering?

The company raised aggregate gross proceeds of approximately $100 million, corresponding to about €86.1 million. This came from issuing 2,218,467 new ordinary shares and 345,099 pre-funded warrants, including portions represented as ADSs and Additional ADSs on Nasdaq.

What securities did Nanobiotix (NBTX) issue in this financing?

Nanobiotix issued 2,218,467 new ordinary shares, including 225,373 in ADS form and 33,805 as Additional ADSs, plus 345,099 pre-funded warrants. Each pre-funded warrant is exercisable for one ordinary share, providing additional potential future capital to the company.

At what price were Nanobiotix (NBTX) shares and ADSs sold?

The subscription price was set at €33.60 per ordinary share, equal to an offering price of $38.98 per ADS. This price matched the recent volume-weighted average share price minus a 14.92% discount determined under a prior shareholder resolution.

How will Nanobiotix (NBTX) use the net proceeds from the offering?

Net proceeds are intended to be used mainly to advance Nanoprimer and other platforms (50-60%), general corporate purposes (30-40%), and to support JNJ-1900 (NBTXR3) with less than 10%. Management also cites flexibility based on evolving development needs.

How long does Nanobiotix (NBTX) expect its cash to last after this raise?

The company believes that net proceeds from the Global Offering, combined with existing cash and cash equivalents, will be sufficient to meet working capital requirements for operations into 2029, based on its currently contemplated cash burn rate and development plans.

Under what registration did Nanobiotix (NBTX) conduct the offering?

The ADSs, Additional ADSs, and ordinary shares were issued under an effective shelf registration statement on Form F-3, number 333-285604. That registration became effective in March 2025, enabling the company to conduct this global offering via prospectus and prospectus supplement.

Filing Exhibits & Attachments

1 document