Welcome to our dedicated page for 908 Devices SEC filings (Ticker: MASS), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
908 Devices Inc. filings document an operating company that sells common stock under MASS on the Nasdaq Global Market and reports on handheld chemical analysis tools used in health, safety and defense technology markets. Form 8-K reports furnish operating and financial results, revenue outlook materials, material-event disclosures, material agreements, capital-structure matters and related exhibits.
Proxy materials cover annual meeting voting matters, including director elections, auditor ratification, executive compensation votes and the frequency of future advisory compensation votes. The filing record also includes governance disclosures tied to board composition, annual meeting procedures, shareholder voting mechanics and emerging growth company status.
AWM Investment Company, Inc., as investment adviser to several funds, reported open-market sales of 908 Devices Inc. common stock held indirectly through limited partnerships. The transactions covered 39,782 shares at a weighted-average price of $8.9703 on June 4, 2026 and 2,500 shares at $8.95 on June 2, 2026. After these sales, entities advised by AWM reported holding 4,887,491 shares indirectly. AWM and its principals disclaim beneficial ownership of these shares except to the extent of their pecuniary interest.
908 Devices Inc. director Christopher D. Brown sold shares of company stock. On this Form 4, he reported an open-market sale of 20,000 shares of common stock at a weighted average price of $8.73 per share. After the transaction, he directly holds 875,559 shares. The sale was executed under a pre-arranged Rule 10b5-1 trading plan adopted on November 24, 2025.
MASS filed a Form 144 to sell 70,000 shares of Common Stock.
The notice lists multiple 10b5-1 sales by Christopher Brown: 30,000 shares on 05/28/2026 for $270,000, 20,000 shares on 05/06/2026 for $144,668, and earlier April sales totaling additional shares and proceeds.
AWM Investment Company, Inc., a 10% owner of 908 Devices Inc., reported open-market sales totaling 186,942 shares of common stock through a limited partnership on May 27–28, 2026. Sale prices ranged from about $8.25 to $8.66 per share, leaving 4,929,773 shares indirectly held afterward. AWM reports these holdings as investment adviser to several funds and disclaims beneficial ownership beyond its pecuniary interest.
908 Devices Inc. Chief Financial Officer Joseph H. Griffith IV sold 6,940 shares of Common Stock in an open-market transaction at a price of $9.03 per share on May 28, 2026.
After this sale, he continues to hold 132,956 shares directly. The filing notes that the transaction was carried out under a pre-arranged Rule 10b5-1 trading plan, indicating the sale was scheduled in advance rather than timed discretionarily.
908 Devices Inc. director Christopher D. Brown sold 30,000 shares of Common Stock in an open-market transaction at $9.00 per share. After the sale on May 28, 2026, he directly held 895,559 shares of the company’s stock. The trade was executed under a pre-arranged Rule 10b5-1 trading plan adopted on November 24, 2025, indicating the sale was scheduled in advance rather than timed discretionarily.
ARCH Venture Fund VII and affiliated reporting persons amend a Schedule 13G/A to report beneficial ownership of 5,725,045 shares of Common Stock of 908 Devices Inc. The filing states the Record Shares are held by ARCH Venture Fund VII as of March 31, 2026. The percentage on the cover pages is 15.1% for the reporting entities and 15.3% for Keith Crandell, with the latter reflecting vested options, 57,794 vested option shares, 25,291 RSUs and 1,086 options vesting within sixty days. The percentage figures are calculated using 37,813,621 shares outstanding as of May 4, 2026, per the issuer’s Form 10-Q.
AWM Investment Company, Inc., a 10% owner of 908 Devices Inc., reported an indirect open-market sale of 5,000 shares of Common Stock at a weighted average price of $8.2514 per share on May 11, 2026.
The shares are held through a limited partnership, and AWM reports indirect ownership. After this transaction, entities advised by AWM collectively held 5,116,715 shares of 908 Devices Common Stock. AWM and its principals disclaim beneficial ownership beyond their pecuniary interest.
908 Devices Inc. senior vice president of sales and product marketing John Kenneweg sold 18,255 shares of Common Stock in an open-market transaction on May 8, 2026 at a weighted average price of $8.11 per share. The sales occurred at prices ranging from $7.99 to $8.20. After these transactions, he directly owns 57,784 shares of 908 Devices Common Stock.