908 Devices Inc.
MASS- Exchange
- Nasdaq
- Industry
- Laboratory Analytical Instruments
- SEC CIK
- 0001555279
In the last 90 days, 908 Devices Inc. insiders filed 0 open-market purchases and 13 sales; 111 institutions reported holding it in 13F filings for Q2 2026, worth $244.1M in total; ARK Invest is the only superinvestor holding it.
Holders of 5% or more of MASS
Holders whose latest Schedule 13D or 13G filing reports 5% or more of 908 Devices Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| First Light Asset Management, LLC | 13G/A | 17.09%6.18M shares | +4.16 ppfrom 12.93% | Nov 14, 20253 filings | Feb 17, 2026 | SEC |
| AWM Investment Company, Inc. | 13G | 14.70%5.20M shares | New | Apr 7, 20251 filing | Apr 7, 2025 | SEC |
| ARK Investment Management LLCSuperinvestorARK Invest | 13G/A | 5.41%1.95M shares | −2.60 ppfrom 8.01% | Jan 10, 20253 filings | Nov 4, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
12 Schedule 13D and 13G filings on 908 Devices Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Feb 17, 20264:35 PM ET | First Light Asset Management, LLCand 1 other | 13G/A | 17.09%6.18M shares | +4.16 ppfrom 12.93% | Dec 31, 2025 | SEC |
| Feb 9, 20266:14 AM ET | State Street Corpand 1 other | 13G | 1.60%596.3K shares | −4.80 ppfrom 6.40%Below 5% | Dec 31, 2025 | SEC |
| Dec 5, 20254:32 PM ET | First Light Asset Management, LLCand 1 other | 13G/A | 12.93%4.68M shares | +3.09 ppfrom 9.84% | Nov 30, 2025 | SEC |
| Nov 14, 20254:37 PM ET | First Light Asset Management, LLCand 1 other | 13G | 9.84%3.56M shares | New | Sep 30, 2025 | SEC |
| Nov 4, 20254:46 PM ET | ARK Investment Management LLCand 1 otherSuperinvestorARK Invest | 13G/A | 5.41%1.95M shares | −2.60 ppfrom 8.01% | Sep 30, 2025 | SEC |
| Aug 11, 20256:39 AM ET | State Street Corpand 1 other | 13G | 6.40%2.29M shares | New | Jun 30, 2025 | SEC |
| May 15, 202510:52 AM ET | Ameriprise Financial Incand 1 other | 13G/A | 0.00%316 shares | –Below 5% | Mar 31, 2025 | SEC |
| Apr 25, 20254:03 PM ET | BlackRock, Inc. | 13G/A | 4.60%1.61M shares | –Below 5% | Mar 31, 2025 | SEC |
| Apr 7, 20254:18 PM ET | AWM Investment Company, Inc. | 13G | 14.70%5.20M shares | New | Mar 31, 2025 | SEC |
| Feb 14, 202511:23 AM ET | ARK Investment Management LLCSuperinvestorARK Invest | 13G/A | 8.01%2.79M shares | −1.28 ppfrom 9.29% | Dec 31, 2024 | SEC |
| Jan 30, 20258:09 PM ET | Vanguard Group Inc | 13G/A | 3.80%1.32M shares | –Below 5% | Dec 31, 2024 | SEC |
| Jan 10, 20259:23 PM ET | ARK Investment Management LLCSuperinvestorARK Invest | 13G/A | 9.29%3.22M shares | – | Sep 30, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell 908 Devices Inc. shares.
No Form 144 notices for 908 Devices Inc. are on file.