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.
On October 7, 2026, 908 Devices Inc. director Christopher D. Brown exercised options to acquire 60,000 common shares at $1.75 per share. He sold 30,000 common shares at a weighted average price of $11.89 per share, with reported sale prices ranging from $11.75 to $12.12. The option transaction reports 54,318 shares following the exercise; the options were fully vested and immediately exercisable, and expire June 22, 2027.
908 Devices Inc. Chief Financial Officer Joseph H. Griffith IV sold 5,000 shares of common stock at $13.03 per share on October 6, 2026. The sale was made under a Rule 10b5-1 trading plan adopted May 26, 2026. Griffith directly held 116,497 shares following the transaction.
908 Devices Inc. (MASS) officer Joseph Griffith reported a proposed sale of 5,000 common shares, with an aggregate market value of $64,000 and an approximate sale date of October 6, 2026, on NASDAQ. The shares are listed as acquired from the issuer as restricted stock units on February 1, 2025. The notice also lists 11,459 common shares sold on August 25, 2026, for $125,434.95 under “10b5-1 Sales.”
908 Devices Inc. (MASS) ten-percent owner AWM Investment Company, Inc. reported an indirect sale of 18,000 common shares held by a limited partnership on September 29, 2026, at a weighted average price of $11.5179 per share. The reported position following the sale was 4,736,773 shares. AWM is identified as investment adviser to several funds, with sole voting and investment power over fund-held shares. David M. Greenhouse and Adam C. Stettner are identified as AWM's controlling principals.
AWM Investment Company, Inc., a ten-percent owner of 908 Devices Inc., reported two indirect sales of Common Stock through limited partnerships: 1,000 shares on September 23, 2026, at a weighted-average price of $11.25 per share, and 24,000 shares on September 24, 2026, at a weighted-average price of $11.3594 per share. Reported holdings following the September 23 sale were 4,755,773 shares; following the September 24 sale, they were 4,754,773 shares.
908 Devices Inc. executive John Kenneweg, Senior Vice President of Sales & Product Marketing, reported option exercises and related sales of company stock. On September 15–17, 2026, he exercised stock options to acquire a total of 27,656 shares of common stock at an exercise price of $0.96 per share and sold the same number of shares in open-market or private transactions at weighted average prices of $10.00, $10.11, and $10.22 per share, respectively.
The trades were made pursuant to a Rule 10b5-1 trading plan adopted on June 12, 2026, and the options exercised were fully vested and immediately exercisable.
908 Devices Inc. (MASS) received a notice under Rule 144 that officer John Kenneweg plans to sell 27,656 shares of common stock, to be obtained through the exercise of stock options for cash around September 15, 2026 and over the following three months.
The planned sale is to be executed through Morgan Stanley Smith Barney LLC Executive Financial Services, with an indicated aggregate market value of about $269,092.88 and trading on NASDAQ.
908 Devices Inc. (MASS) director Christopher D. Brown reported selling 30,000 shares of common stock on September 2, 2026, at a weighted average price of $10.58 per share in open-market or private transactions. The sales were made pursuant to a Rule 10b5-1 trading plan adopted on November 24, 2025, and Brown now holds 775,559 shares directly.
908 Devices Inc. (MASS) reported that Chief Financial Officer Joseph H. Griffith IV sold 11,459 shares of common stock on August 25, 2026 in an open-market or private transaction. The weighted-average sale price was approximately $10.95 per share, with execution prices ranging from $10.65 to $11.03. Following this sale, Griffith directly holds 121,497 shares of 908 Devices Inc. common stock. The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 26, 2026.
908 Devices Inc. (MASS) executive Joseph Griffith, an officer of the company, filed a Rule 144 notice to sell up to 11,459 shares of common stock through Morgan Stanley Smith Barney LLC. The shares were acquired upon vesting of restricted stock units between February 1, 2025 and February 1, 2026. The filing also lists a prior 10b5-1 sale of 6,940 shares of common stock on May 28, 2026.