908 Devices Inc. (MASS) ownership: Top institutional holder: First Light Asset Management, LLC ($37.16M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| First Light Asset Management, LLC | 6072563.00 | $37.16M | 2026-03-31 |
| AWM Investment Company, Inc. | 5199924.00 | $31.82M | 2026-03-31 |
| ARK Investment Management LLC | 1946685.00 | $11.91M | 2026-03-31 |
| BlackRock, Inc. | 1767316.00 | $10.82M | 2026-03-31 |
| VANGUARD GROUP INC | 1470864.00 | $7.72M | 2025-12-31 |
| NEEDHAM INVESTMENT MANAGEMENT LLC | 1240000.00 | $7.59M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 1119236.00 | $6.85M | 2026-03-31 |
| First Eagle Investment Management, LLC | 803606.00 | $4.92M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-11 | |
| Sell | null | 2026-06-11 | |
| Sell | null | 2026-06-10 | |
| Sell | null | 2026-06-10 | |
| Sell | null | 2026-06-10 | |
| Sell | null | 2026-06-10 | |
| Sell | null | 2026-06-10 | |
| Sell | null | 2026-06-10 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.