6-K
Nyxoah SA (NYXH)
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form6-K
REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TORULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934
For the month of December 2025
Commission File Number: 001-40552
NYXOAH SA
(Translation of registrant’s name into English)
RueEdouard Belin 12, 1435 Mont-Saint-Guibert, Belgium
(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 ¨
Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨
Note: Regulation S-T Rule 101(b)(1) only permits the submission in paper of a Form 6-K if submitted solely to provide an attached annual report to security holders.
Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ¨
Note: Regulation S-T Rule 101(b)(7) only permits the submission in paper of a Form 6-K if submitted to furnish a report or other document that the registrant foreign private issuer must furnish and make public under the laws of the jurisdiction in which the registrant is incorporated, domiciled or legally organized (the registrant’s “home country”), or under the rules of the home country exchange on which the registrant’s securities are traded, as long as the report or other document is not a press release, is not required to be and has not been distributed to the registrant’s security holders, and, if discussing a material event, has already been the subject of a Form 6-K submission or other Commission filing on EDGAR.
Nyxoah SA
NotesOffering
As previously disclosed, on November 13, 2025, the Company entered into a Subscription Agreement (the “Notes Subscription Agreement”) with a certain institutional investor (the “Notes Investor”), pursuant to which the Company agreed to sell, and the Notes Investor agreed to purchase, up to €45.0 million in aggregate principal amount of amortizing senior unsecured convertible notes at an 8.0% original issue discount (the “Notes Offering”), consisting of an initial tranche of €22.5 million amortizing senior unsecured convertible notes (the “First Tranche Notes”) and a second tranche of €22.5 million amortizing senior unsecured convertible notes (the “Second Tranche Notes,” and together with the First Tranche Notes, the “Notes”).
On December 16, 2025, the Company entered into an Amended and Restated Subscription Agreement (the “Amended and Restated Notes Subscription Agreement”) with the Notes Investor, pursuant to which the Company agreed to, among other things, pay to the Notes Investor, in lieu of an original issue discount, a subscription fee equal to 8.0% of the principal amount of the First Tranche Notes and the Second Tranche Notes, as applicable, at issuance.
In connection with the execution of the Amended and Restated Notes Subscription Agreement, on December 18, 2025, the Company issued the First Tranche Notes to the Notes Investor, and paid a subscription fee to the Notes Investor of approximately €1.8 million.
As previously disclosed, the issuance of the Second Tranche Notes is subject to additional customary closing conditions and will take place upon satisfaction of such closing conditions.
Assuming the successful issuance of the Second Tranche Notes, the gross amount of proceeds to us from the Notes Offering will be approximately €41.4 million. The Company expects to use the proceeds from the Notes Offering for working capital and other general corporate purposes.
The above is intended to provide a summary of the terms of the Amended and Restated Notes Subscription Agreement and the Notes. This summary is qualified in its entirety by reference to the full text of the Amended and Restated Notes Subscription Agreement and the Notes, which will be attached as exhibits to a future filing.
This Report on Form 6-K shall not constitute an offer to sell or the solicitation to buy nor shall there be any sale of the Company’s 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 Notes, and any ordinary shares issuable upon the conversion or settlement thereof, including in connection with the amortization of such Notes, are not being registered under the Securities Act of 1933, as amended. The ordinary shares are being offered to non-U.S. Persons (as such term is defined under Rule 902 of Regulation S) in a transaction outside the United States pursuant to Regulation S.
Theinformation included under the heading “Note Offering” of this report on Form 6-K shall be deemed to be incorporatedby reference into the registration statements on Form S-8 (Registration Numbers 333-285960,333-261233 and 333-269410)and Form F-3 (Registration Numbers 333-285982 and 333-268955)of the Company (including any prospectuses forming a part of such registration statements) and to be a part thereof from the date onwhich this report is filed, to the extent not superseded by documents or reports subsequently filed or furnished.
Press Releases
On December 17, 2025, the Company issued a press release announcing the commercial launch of its Genio system in the Netherlands. A copy of the Company’s press release is attached hereto as Exhibit 99.1.
On December 19, 2025, the Company issued a press release announcing the issuance of the First Tranche Notes and providing an update regarding the Company’s cash runway. A copy of the Company’s press release is attached hereto as Exhibit 99.2.
The information in the attached Exhibit 99.1is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934,as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporatedby reference in any filing made by the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as otherwiseset forth herein or as shall be expressly set forth by specific reference in such a filing.
Theinformation under the headings “Closing of the first tranche of the convertible bonds’ issuance” and“Second tranche convertible bonds” in the attached Exhibit 99.2 shall be deemed to be incorporated by reference intothe registration statements on Form S-8 (Registration Numbers 333-285960,333-261233 and 333-269410)and Form F-3 (Registration Numbers 333-285982 and 333-268955)of the Company (including any prospectuses forming a part of such registration statements) and to be a part thereof from the date onwhich this report is filed, to the extent not superseded by documents or reports subsequently filed or furnished.
Exhibits
| 99.1 | Press Release,<br> dated December 17, 2025. |
|---|---|
| 99.2 | Press Release, dated December<br> 19, 2025. |
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.
| NYXOAH SA | ||
|---|---|---|
| Date: December 19, 2025 | By: | /s/ John Landry |
| Name: | John Landry | |
| Title: | Chief Financial Officer |
Exhibit 99.1
Nyxoah Announces Commercial Launch of Genio® BreakthroughTherapy in the Netherlands
December 17, 2025
Nyxoah Announces Commercial Launch of Genio® BreakthroughTherapy in the Netherlands
First Genio implants successfully performed at OLVG Westand Zuyderland hospitals
Mont-Saint-Guibert, Belgium – December 17, 2025,7:05am CET / 1:05am ET – Nyxoah SA (Euronext Brussels/Nasdaq: NYXH) (“Nyxoah” or the “Company”), a medical technology company that develops breakthrough treatment alternatives for Obstructive Sleep Apnea (OSA) through neuromodulation, today announced the commercial launch of its Genio® system in the Netherlands, marked by the first successful Genio implants performed at OLVG West in Amsterdam and Zuyderland Hospital in Heerlen.
Commenting on the introduction of Genio in Amsterdam, Dr. Peter van Maanen, ENT surgeon at OLVG West, stated: “Dr. Mayke Hentschel, our sleep department and I are pleased to offer our patients an additional treatment option for OSA when CPAP is not tolerated. With Genio, patients finally have a real choice. The system stimulates both branches of the nerve, has no internal battery, is full body 1.5 and 3T MRI-compatible, and can be easily upgraded via the external activation chip. These features make it a promising long-term solution for both patients and healthcare providers.”
At Zuyderland Hospital, Dr. Jos Straetmans, ENT surgeon in Heerlen and Sittard, added: “Introducing the Genio bilateral neurostimulation system expands our ability to tailor therapy to the needs of each individual patient. Its advantages: no implanted battery, and reliable performance in the supine position make it a valuable addition to our treatment arsenal. We are excited to bring this innovative, European developed technology to patients in our community.”
“The commercial launch of Genio in the Netherlands marks another important step in our European rollout and reflects growing adoption of our bilateral, externally powered Genio therapy,” commented Olivier Taelman, Nyxoah's Chief Executive Officer. “We are proud to partner with leading Dutch centers to bring Genio to patients seeking an effective and patient-centric alternative to CPAP. As we continue to expand our commercial footprint, these early implants further validate Genio’s role as a long-term solution for OSA.”
About Nyxoah
Nyxoah is a medical technology company focused on the development and commercialization of innovative solutions to treat OSA. Nyxoah’s lead solution is the Genio system, a patient-centric, leadless and battery-free hypoglossal neurostimulation therapy for OSA, the world’s most common sleep disordered breathing condition that is associated with increased mortality risk and cardiovascular comorbidities. Nyxoah is driven by the vision that OSA patients should enjoy restful nights and feel enabled to live their life to its fullest.
Following the successful completion of the BLAST OSA study, the Genio system received its European CE Mark in 2019. Nyxoah completed two successful IPOs: on Euronext Brussels in September 2020 and NASDAQ in July 2021. Following the positive outcomes of the BETTER SLEEP study, Nyxoah received CE mark approval for the expansion of its therapeutic indications to Complete Concentric Collapse (CCC) patients, currently contraindicated in competitors’ therapy. Additionally, the Company announced positive outcomes from the DREAM IDE pivotal study and receipt of approval from the FDA for a subset of adult patients with moderate to severe OSA with an AHI of greater than or equal to 15 and less than or equal to 65.
For more information, please visit http://www.nyxoah.com/.
Caution – CE marked since 2019. FDA approved in August 2025 as prescription-only device.
Forward-looking statements
Certain statements, beliefs and opinions in this press release are forward-looking, which reflect the Company’s or, as appropriate, the Company directors’ or managements’ current expectations regarding the Genio system; the potential advantages of the Genio system; Nyxoah’s goals with respect to the potential use of the Genio system; the Company's commercialization strategy and entrance to the U.S. market; and the Company' results of operations, financial condition, liquidity, performance, prospects, growth and strategies. By their nature, forward-looking statements involve a number of risks, uncertainties, assumptions and other factors that could cause actual results or events to differ materially from those expressed or implied by the forward-looking statements. These risks, uncertainties, assumptions and factors could adversely affect the outcome and financial effects of the plans and events described herein. These risks and uncertainties include, but are not limited to, the risks and uncertainties set forth in the “Risk Factors” section of the Company’s Annual Report on Form 20-F for the year ended December 31, 2024, filed with the Securities and Exchange Commission (“SEC”) on March 20, 2025 and subsequent reports that the Company files with the SEC. A multitude of factors including, but not limited to, changes in demand, competition and technology, can cause actual events, performance or results to differ significantly from any anticipated development. Forward-looking statements contained in this press release regarding past trends or activities are not guarantees of future performance and should not be taken as a representation that such trends or activities will continue in the future. In addition, even if actual results or developments are consistent with the forward-looking statements contained in this press release, those results or developments may not be indicative of results or developments in future periods. No representations and warranties are made as to the accuracy or fairness of such forward-looking statements. As a result, the Company expressly disclaims any obligation or undertaking to release any updates or revisions to any forward-looking statements in this press release as a result of any change in expectations or any change in events, conditions, assumptions or circumstances on which these forward-looking statements are based, except if specifically required to do so by law or regulation. Neither the Company nor its advisers or representatives nor any of its subsidiary undertakings or any such person's officers or employees guarantees that the assumptions underlying such forward-looking statements are free from errors nor does either accept any responsibility for the future accuracy of the forward-looking statements contained in this press release or the actual occurrence of the forecasted developments. You should not place undue reliance on forward-looking statements, which speak only as of the date of this press release.
Contacts:
Nyxoah
John Landry, CFO
IR@nyxoah.com
Rémi Renard
Chief Investor Relations & Corporate Communication Officer
IR@nyxoah.com
Attachment
· ENGLISH_Nyxoah Announces Commercial Launch of Genio Breakthrough Therapy in the Netherlands
Exhibit 99.2
Nyxoah Announces Issuance of FirstTranche of Convertible Bonds
Mont-Saint-Guibert, Belgium – December19, 2025, 10:05pm CET / 4:05pm ET – Nyxoah SA (Euronext Brussels/Nasdaq: NYXH) (“Nyxoah” or the “Company”), a medical technology company focused on the development and commercialization of innovative solutions to treat Obstructive Sleep Apnea (OSA) through neuromodulation, today announced the issuance of the first tranche of the convertible bond financing entered into with an entity managed by Heights Capital Management (“HCM”) of up to €45 million, as previously announced by the Company on November 13, 2025.
Closing of the first tranche of the convertiblebonds’ issuance
On December 18, 2025, the Company issued the first tranche of convertible bonds for a nominal amount of €22.5 million under the subscription agreement entered into with HCM on November 13, 2025, as amended and restated on December 16, 2025. The first tranche consisted of the issuance of 225 convertible bonds (the “FirstTranche Bonds”) with a nominal amount of €100,000 each, which were fully subscribed to and paid-up by HCM. Pursuant to the subscription agreement, the Company has paid a subscription fee to HCM equal to 8.0 per cent of the principal amount of the First Tranche Bonds (i.e., €1.8 million), which has been satisfied by set-off against the respective portion of the subscription price of the First Tranche Bonds due by HCM.
The First Tranche Bonds carry an interest rate of 6.5 per cent per annum and have a three-year maturity from issuance with quarterly amortization payments (each a “ScheduledAmortisation Payment Date”) of principal (equal to an amount of €8.500 per First Tranche Bond, except for the final amortization payment which will be equal to €6.500 per First Tranche Bond, each an “Amortised Payment Amount”) and interest. The first Scheduled Amortisation Payment Date will be on February 18, 2026.
In addition to the scheduled amortisation payments, HCM (or any future holders of the majority of the First Tranche Bonds) may, at any time between two Scheduled Amortisation Payment Dates (a “Regular Amortisation Period”), exercise its right to bring forward the payment of up to two Amortised Payment Amounts to a date specified in a notice sent to the Company which shall not be earlier than three business days following the date on which the relevant notice is given. Additionally, HCM (or any future holders of the majority of the First Tranche Bonds) will also have the right to defer the payment of any upcoming Amortised Payment Amount to any subsequent Scheduled Amortisation Payment Date specified in the notice sent to the Company.
HCM may elect to convert the outstanding principal amount under the First Tranche Bonds or any Amortized Payment Amount at any time during the term of the bonds. The initial conversion price for the First Tranche Bonds, which can be modified on a downward basis, shall be equal to €5.00, which represents 125 per cent of the placement price of the shares that have been issued pursuant to the previously announced private placement and registered direct offering (the “Capital Increases”).
Each payment of the Amortised Payment Amounts shall in principle be done in cash at an amount equal to 103 per cent of the principal amount of such Amortised Payment Amount. However, the Company may elect to satisfy its obligation to repay the relevant Amortised Payment Amount by issuing new ordinary shares in the Company to HCM (the “Share Settlement Option”). In case the Company exercises its Share Settlement Option, the issue price for the newly to be issued ordinary shares will be the lower of (a) the conversion price in effect at the time, and (b) 90% of the lower of (i) the VWAP of an ordinary share on the relevant Scheduled Amortisation Payment Date, and (ii) the lowest of the VWAPs of an ordinary share on each of the five consecutive dealing days ending on (and including) such Scheduled Amortisation Payment Date.
More information on the First Tranche Bonds is available in the special report of the board of directors of the Company drawn up in accordance with articles 7:180, 7:191 and 7:193 of the Belgian Code on companies and associations located at https://investors.nyxoah.com/financials.
Second tranche convertible bonds
Pursuant to the subscription agreement, the Company has the option to issue a second tranche of convertible bonds (the “Second Tranche Bonds”) to HCM for an aggregate principal amount of up to €22.5 million if so requested by the Company in the period between July 18, 2026 and August 18, 2026.
The Company and HCM can agree in writing to a lesser aggregate principal amount than €22.5 million for the Second Tranche Bonds issuance.
The obligation for HCM to subscribe to the Second Tranche Bonds on the closing date for the Second Tranche Bonds (the “Second Tranche Closing Date”) shall be subject to certain customary conditions precedent being satisfied (or waived by HCM) prior to or on the Second Tranche Closing Date. More specifically, it is, among others, required that:
| · | the arithmetic mean (rounded to the nearest whole multiple of U.S.$1.00 (with U.S.$0.50 being rounded<br>upwards)) of the daily traded values of the ordinary shares of the Company on each dealing day comprised in the period of sixty qualifying<br>stock exchange days ending on the qualifying stock exchange date immediately preceding the date of the Company’s request to issue<br>the Second Tranche Bonds is greater than U.S.$1 million (or its equivalent in any other currency); and |
|---|---|
| · | the Company has a last market capitalisation immediately preceding the Second Tranche Closing Date, and<br>an average market capitalisation on each of the 30 consecutive dealing days ending on (and including) the dealing day immediately preceding<br>the Second Tranche Closing Date that are each greater than €240,000,000. |
| --- | --- |
As of December 16, 2025, the conditions precedent relating to the daily traded values, the last market capitalisation and the average market capitalisation were not met. More precisely, as of December 16, 2025, the arithmetic mean of the daily traded values amounted to U.S.$ 772,176, the last market capitalisation amounted to €177,053,883 and the 30-day average market capitalisation amounted to €175,959,735.
The Second Tranche Bonds shall, to the extent applicable, be issued on substantially the same terms as the First Tranche Bonds. The initial conversion price of the Second Tranche Bonds shall be equal to the lowest of the five VWAPs of the ordinary shares of the Company on Euronext Brussels on each of the five dealing days ending on the Second Tranche Closing Date.
Cash runway
The issuance of the First Tranche Bonds and closing of the Capital Increases, together with the second tranche under the Company’s existing credit facility with the European Investment Bank (for which the possibility to draw depends on a revenue milestone that the Company expects to meet in the first half of 2026), will extend the Company’s cash runway into the third quarter of 2026. If, in addition to the foregoing, the Second Tranche Bonds are issued, the Company’s cash runway will be extended by two (2) quarters, into the first quarter of 2027.
The net proceeds from the First Tranche Bonds together with the net proceeds of the Capital Increases will be used (i) to support commercialization activities in the United States and advance the commercialization of the Genio system in the Company’s initial target markets outside the United States; (ii) to continue gathering clinical data and to support physician-initiated clinical research projects related to OSA patient treatments; (iii) to further finance research and development activities related to Genio system upgrades, re-designing the Company’s products for manufacturability and cost reduction initiatives; (iv) to continue to build a pipeline of new technologies and explore potential collaboration opportunities in the field of monitoring and diagnostics for OSA; and (v) for other general corporate purposes, including, but not limited to, working capital, capital expenditures, investments, acquisitions, should the Company choose to pursue any, and collaborations.
This press release does not constitute an offer to sell or the solicitation of an offer to buy the securities, nor shall there be any sale of the securities in any state in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of such state.
About Nyxoah
Nyxoah is a medical technology company focused on the development and commercialization of innovative solutions to treat OSA. Nyxoah’s lead solution is the Genio system, a patient-centered, leadless and battery-free hypoglossal neurostimulation therapy for OSA, the world’s most common sleep disordered breathing condition that is associated with increased mortality risk and cardiovascular comorbidities. Nyxoah is driven by the vision that OSA patients should enjoy restful nights and feel enabled to live their life to its fullest.
Following the successful completion of the BLAST OSA study, the Genio system received its European CE Mark in 2019. Nyxoah completed two successful IPOs: on Euronext Brussels in September 2020 and NASDAQ in July 2021. Following the positive outcomes of the BETTER SLEEP study, Nyxoah received CE mark approval for the expansion of its therapeutic indications to Complete Concentric Collapse (CCC) patients, currently contraindicated in competitors’ therapy. Additionally, the Company announced positive outcomes from the DREAM IDE pivotal study and receipt of approval from the FDA for a subset of adult patients with moderate to severe OSA with an AHI of greater than or equal to 15 and less than or equal to 65.
Caution – CE marked since 2019. FDA approved in August 2025 as prescription-only device.
IMPORTANT INFORMATION
THIS ANNOUNCEMENT IS NOT FOR DISTRIBUTION, DIRECTLY OR INDIRECTLY, IN ANY JURISDICTION WHERE TO DO SO WOULD BE PROHIBITED BY APPLICABLE LAW. THIS ANNOUNCEMENT IS FOR GENERAL INFORMATION ONLY AND DOES NOT FORM PART OF ANY OFFER TO SELL OR PURCHASE, OR THE SOLICITATION OF ANY OFFER TO SELL OR PURCHASE, ANY SECURITIES. THE DISTRIBUTION OF THIS ANNOUNCEMENT AND THE OFFER, SUBSCRIPTION, SALE AND PURCHASE OF SECURITIES DESCRIBED IN THIS ANNOUNCEMENT IN CERTAIN JURISDICTIONS MAY BE RESTRICTED BY LAW. ANY PERSONS READING THIS ANNOUNCEMENT SHOULD INFORM THEMSELVES OF AND OBSERVE ANY SUCH RESTRICTIONS.
Forward-looking statements
Certain statements, beliefs and opinions in this press release are forward-looking, which reflect the Company’s or, as appropriate, the Company directors’ or managements’ current expectations regarding the convertible bond financing; the Genio system; the potential advantages of the Genio system; Nyxoah’s goals with respect to the potential use of the Genio system; the Company's commercialization strategy and entrance to the U.S. market; and the Company's results of operations, financial condition, liquidity, performance, prospects, growth and strategies. By their nature, forward-looking statements involve a number of risks, uncertainties, assumptions and other factors that could cause actual results or events to differ materially from those expressed or implied by the forward-looking statements. These risks, uncertainties, assumptions and factors could adversely affect the outcome and financial effects of the plans and events described herein. These risks and uncertainties include, but are not limited to, the satisfaction of the closing conditions required for the Second Tranche Bonds and the corresponding closing, the use of net proceeds from the First Tranche Bonds, the expected sufficiency of the Company’s cash resources and runway, which may not be accurate resulting in the need for additional financing sooner than anticipated, the risks and uncertainties set forth in the “Risk Factors” section of the Company’s Annual Report on Form 20-F for the year ended December 31, 2024, filed with the SEC on March 20, 2025 and subsequent reports that the Company files with the SEC. A multitude of factors including, but not limited to, changes in demand, competition and technology, can cause actual events, performance or results to differ significantly from any anticipated development. Forward-looking statements contained in this press release regarding past trends or activities are not guarantees of future performance and should not be taken as a representation that such trends or activities will continue in the future. In addition, even if actual results or developments are consistent with the forward-looking statements contained in this press release, those results or developments may not be indicative of results or developments in future periods. No representations and warranties are made as to the accuracy or fairness of such forward-looking statements. As a result, the Company expressly disclaims any obligation or undertaking to release any updates or revisions to any forward-looking statements in this press release as a result of any change in expectations or any change in events, conditions, assumptions or circumstances on which these forward- looking statements are based, except if specifically required to do so by law or regulation. Neither the Company nor its advisers or representatives nor any of its subsidiary undertakings or any such person's officers or employees guarantees that the assumptions underlying such forward-looking statements are free from errors nor does either accept any responsibility for the future accuracy of the forward-looking statements contained in this press release or the actual occurrence of the forecasted developments. You should not place undue reliance on forward-looking statements, which speak only as of the date of this press release.
Contacts:
Nyxoah
John Landry, CFO
IR@nyxoah.com