SEC Form 4 · accession 0001836876-26-000011
908 Devices Inc. · MASS
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
John Kenneweg
Officer — SVP, Sales & Product Marketing
Period of report
Sep 15, 2026
Accepted (ET)
Sep 17, 2026 · 5:27 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001555279
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Stock | Sep 15, 2026 | M | 1,000 | $0.96 | A | 58,784 | D | |
| Common Stock | Sep 15, 2026 | S | 1,000 | $10.00 | D | 57,784 | D | |
| Common Stock | Sep 16, 2026 | M | 21,399 | $0.96 | A | 79,183 | D | |
| Common StockF2 | Sep 16, 2026 | S | 21,399 | $10.11 | D | 57,784 | D | |
| Common Stock | Sep 17, 2026 | M | 5,257 | $0.96 | A | 63,041 | D | |
| Common StockF3 | Sep 17, 2026 | S | 5,257 | $10.22 | D | 57,784 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock Option (right to buy)F4 | $0.96 | Sep 15, 2026 | M | 1,000 | D | — | Dec 2, 2026 | Common Stock | 1,000 | 26,656 | D |
| Stock Option (right to buy)F4 | $0.96 | Sep 16, 2026 | M | 21,399 | D | — | Dec 2, 2026 | Common Stock | 21,399 | 5,257 | D |
| Stock Option (right to buy)F4 | $0.96 | Sep 17, 2026 | M | 5,257 | D | — | Dec 2, 2026 | Common Stock | 5,257 | 0 | D |
Explanation of responses
- F1This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 12, 2026.
- F2The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.00 to $10.32 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
- F3The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.13 to $10.29 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
- F4The shares underlying the option are fully vested and immediately exercisable.