of this Current Report on Form 8-K is being furnished and shall not be deemed to be “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 and shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended (the “ Securities Act ”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing. ​

Completion of Acquisition or Disposition of Assets. The information set forth in

Pursuant to the terms of the Purchase Agreement and as set forth in Item 1.01, the Company issued or may issue Company Shares as Option Share Payment, Stock Consideration and Earn-Out Consideration (subject to the achievement of certain milestones set forth in the Purchase Agreement) (such Company Shares, the “Transaction Shares”). The Transaction Shares were or will be issued without registration under the Securities Act of 1933, as amended (the “Securities Act”), in reliance upon the exempt…

and Exhibit 99.1 attached hereto is intended to be furnished and shall not be deemed “filed” for 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 incorporated by reference in any filing under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Entry into a Material Definitive Agreement. Share Purchase Agreement On May 4, 2026 (the “Closing Date”), 908 Devices Inc. (the “Company”) completed its acquisition of NIRLAB SA, a corporation organized under the laws of Switzerland (“NIRLAB”), and its wholly owned subsidiary, NIRLAB Forensics Sàrl, a limited liability company organized under the laws of Switzerland (the “Subsidiary” and, together with NIRLAB, the “NIRLAB Group”), pursuant to a Share Purchase Agreement (the “Purchase Agreemen…

Regulation FD Disclosure. On May 6 , 2026, the Company issued a press release announcing that it had entered into the Purchase Agreement. A copy of the press release is attached as Exhibit 99.2 to this Current Report on Form 8-K. Additionally, on May 6, 2026, 908 Devices posted an investor presentation regarding the acquisition of NIRLAB under the “Events & Presentations” section of its website. The information contained on or that can be accessed through the 908 Devices website is not incorp…

of this Current Report on Form 8-K is being furnished and shall not be deemed to be “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 and shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended (the “ Securities Act ”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing. ​

of this Current Report on Form 8-K is being furnished and shall not be deemed to be “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 and shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended (the “ Securities Act ”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing. ​

of this Current Report on Form 8-K is being furnished and shall not be deemed to be “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 and shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended (the “ Securities Act ”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

of this Current Report on Form 8-K is being furnished and shall not be deemed to be “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 and shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended (the “ Securities Act ”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Director — Jeff George: Jeff George resigned from the Board of Directors and was succeeded by Brandi C. Vann, Ph.D.

Director — Marcia Eisenberg: Ms. Eisenberg resigned from the Board of Directors and was replaced by Dr. Christopher D. Brown.

of this Current Report on Form 8-K is being furnished and shall not be deemed to be “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 and shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended (the “ Securities Act ”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Completion of Acquisition or Disposition of Assets As described in

Entry into a Material Definitive Agreement. On March 4, 2025, 908 Devices Inc. (the “ Company ”) completed the sale of all issued and outstanding equity interests of its wholly-owned subsidiary, 908 Devices GmbH (the “ Transferred Company ” and such equity interests, the “ Transferred Equity Interests ”), and certain liabilities and specified assets of the Company (the “ Purchased Assets ”), which together constitute the entirety of the Company’s portfolio of desktop devices used in the field…

of this Current Report on Form 8-K is being furnished and shall not be deemed to be “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 and shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended (the “ Securities Act ”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

of this Form 8-K is being furnished and shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act, or otherwise subject to the liabilities of that section and shall not be incorporated by reference in any filing under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such filing. The estimates of the charges and cash expenditures that the Company expects to incur in connection with the workforce reduct…

of this Form 8-K is being furnished and shall not be deemed to be “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 and shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended (the “ Securities Act ”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

of this Current Report on Form 8-K is being furnished and shall not be deemed to be “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 and shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended (the “ Securities Act ”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Furthermore, subject to the achievement of the Earnout Milestone, the Company may issue up to 4,000,000 unregistered shares of its Common Stock as Earnout Shares, based on the level of achievement of the Earnout Milestone pursuant to the terms of the Purchase Agreement and as set forth in

Completion of Acquisition or Disposition of Assets. The information set forth in

of this Current Report on Form 8-K is being furnished and shall not be deemed to be “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 and shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended (the “ Securities Act ”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Entry into a Material Definitive Agreement. Equity Purchase Agreement On April 29, 2024, 908 Devices Inc. (the “Company”), entered into an Equity Purchase Agreement (the “Purchase Agreement”) with CAM2 Technologies, LLC, a Connecticut limited liability company (d/b/a RedWave Technology) (“RedWave”), CAM3 HoldCo, LLC, a Connecticut limited liability company (“Seller Entity”), each of the holders of outstanding equity interests of Seller Entity (the “Beneficial Sellers”, together with the Selle…

of this Current Report on Form 8-K is being furnished and shall not be deemed to be “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 and shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended (the “ Securities Act ”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

of this Current Report on Form 8-K is being furnished and shall not be deemed to be “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 and shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended (the “ Securities Act ”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.