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 10 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 |
| ARCH Venture Fund VII, L.P. | 13G/A | 14.10%5.82M shares | −1.20 ppfrom 15.30% | Feb 4, 20217 filings | Aug 14, 2026 | SEC |
| AWM Investment Company, Inc. | 13G/A | 11.80%4.88M shares | −2.90 ppfrom 14.70% | Apr 7, 20252 filings | Aug 14, 2026 | SEC |
| ARK Investment Management LLCSuperinvestorARK Invest | 13G/A | 5.32%2.03M shares | +0.38 ppfrom 4.94% | Sep 10, 202110 filings | Aug 14, 2026 | 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
49 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 |
|---|---|---|---|---|---|---|
| Oct 27, 20265:25 PM ET | BlackRock, Inc. | 13G/A | 4.90%2.04M shares | −0.20 ppfrom 5.10%Below 5% | Sep 30, 2026 | SEC |
| Aug 14, 20264:05 PM ET | ARCH Venture Fund VII, L.P.and 5 others | 13G/A | 14.10%5.82M shares | −1.20 ppfrom 15.30% | Jun 30, 2026 | SEC |
| Aug 14, 20262:59 PM ET | ARK Investment Management LLCand 1 otherSuperinvestorARK Invest | 13G/A | 5.32%2.03M shares | +0.38 ppfrom 4.94% | Jun 30, 2026 | SEC |
| Aug 14, 20262:58 PM ET | AWM Investment Company, Inc. | 13G/A | 11.80%4.88M shares | −2.90 ppfrom 14.70% | Jun 30, 2026 | SEC |
| Jul 27, 20264:25 PM ET | BlackRock, Inc. | 13G | 5.10%1.94M shares | +0.50 ppfrom 4.60% | Jun 30, 2026 | SEC |
| Jun 5, 20263:39 PM ET | ARK Investment Management LLCand 1 otherSuperinvestorARK Invest | 13G/A | 4.94%1.88M shares | −0.47 ppfrom 5.41%Below 5% | May 31, 2026 | SEC |
| May 15, 20264:05 PM ET | ARCH Venture Fund VII, L.P.and 5 others | 13G/A | 15.30%5.81M shares | – | Mar 31, 2026 | SEC |
| 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 |
| Nov 14, 2024 | Granahan Investment Management Inc | 13G/AOld format | – | – | – | SEC |
| Nov 14, 2024 | ARCH Venture Fund VII, L.P. | 13G/AOld format | – | – | – | SEC |
| Nov 8, 2024 | BlackRock, Inc. | 13GOld format | – | – | – | SEC |
| Oct 24, 2024 | BlackRock, Inc. | 13GOld format | – | New | – | SEC |
| Jul 8, 20244:32 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2024 | Eventide Asset Management, LLC | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2024 | Granahan Investment Management Inc | 13GOld format | – | New | – | SEC |
| Feb 14, 2024 | Ameriprise Financial Inc | 13GOld format | – | New | – | SEC |
| Feb 13, 2024 | Vanguard Group Inc | 13GOld format | – | New | – | SEC |
| Feb 9, 2024 | ARCH Venture Fund VII, L.P. | 13G/AOld format | – | – | – | SEC |
| Jan 31, 20242:08 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 29, 2024 | ARK Investment Management LLCSuperinvestorARK Invest | 13G/AOld format | – | – | – | SEC |
| Nov 13, 2023 | Alger Associates Inc | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2023 | Eventide Asset Management, LLC | 13GOld format | – | New | – | SEC |
| Feb 14, 2023 | Alger Associates Inc | 13G/AOld format | – | – | – | SEC |
| Feb 13, 2023 | ARCH Venture Fund VII, L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2023 | ARK Investment Management LLCSuperinvestorARK Invest | 13G/AOld format | – | – | – | SEC |
| Feb 1, 20234:54 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Oct 11, 2022 | Alger Associates Inc | 13GOld format | – | New | – | SEC |
| Jul 8, 20224:56 PM ET | BlackRock Inc. | 13GOld format | – | – | – | SEC |
| Feb 10, 2022 | Razor's Edge Fund, LP | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2022 | ARK Investment Management LLCSuperinvestorARK Invest | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2022 | ARK Investment Management LLCSuperinvestorARK Invest | 13G/AOld format | – | – | – | SEC |
| Feb 8, 2022 | ARCH Venture Fund VII, L.P. | 13G/AOld format | – | – | – | SEC |
| Jan 27, 20225:13 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 26, 20229:16 AM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Sep 10, 2021 | ARK Investment Management LLCSuperinvestorARK Invest | 13GOld format | – | New | – | SEC |
| Sep 9, 20214:20 PM ET | BlackRock Inc. | 13GOld format | – | New | – | SEC |
| Feb 16, 2021 | Razor's Edge Fund, LP | 13GOld format | – | New | – | SEC |
| Feb 4, 2021 | ARCH Venture Fund VII, L.P. | 13GOld format | – | New | – | SEC |
Form 144: proposed insider sales
21 notices from officers, directors and other affiliates planning to sell 908 Devices Inc. shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| Oct 6, 20264:25 PM ET | Joseph GriffithOfficer | 5.00K | $64.0K | Oct 6, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Sep 15, 20264:35 PM ET | John KennewegOfficer | 27.7K | $269.1K | Sep 15, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Aug 25, 20264:29 PM ET | Joseph GriffithOfficer | 11.5K | $125.1K | Aug 25, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Aug 17, 20262:18 PM ET | Kevin KnoppOfficer | 20.0K | $205.0K | Aug 17, 202610b5-1 | Merrill Lynch | SEC |
| Aug 11, 20263:13 PM ET | Kevin KnoppOfficer | 140.0K | $1.35M | Aug 11, 202610b5-1 | Merrill Lynch | SEC |
| Aug 10, 20264:37 PM ET | Christopher BrownDirector | 100.0K | $888.0K | Aug 10, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jun 23, 202612:46 PM ET | Kevin KnoppOfficer | 80.0K | $724.0K | Jun 23, 202610b5-1 | Merrill Lynch | SEC |
| Jun 3, 20264:31 PM ET | Christopher BrownOfficer | 70.0K | $619.5K | Jun 3, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| May 28, 20264:34 PM ET | Joseph GriffithOfficer | 6.94K | $56.6K | May 28, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| May 8, 20264:35 PM ET | John Wesley KennewegOfficer · Director | 18.3K | $148.1K | May 8, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Apr 8, 20264:31 PM ET | Kevin McCallionOfficer | 27.0K | $182.5K | Apr 8, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Apr 8, 20264:31 PM ET | Christopher BrownDirector | 100.0K | $676.0K | Apr 8, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Oct 2, 20254:24 PM ET | Joseph H Griffith IVOfficer | 5.00K | $45.0K | Oct 2, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Sep 19, 20254:26 PM ET | Joseph H Griffith IVOfficer | 5.00K | $34.1K | Sep 19, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jun 16, 20254:24 PM ET | Michael S TurnerOfficer | 24.6K | $179.8K | Jun 16, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jun 4, 20254:26 PM ET | Joseph H Griffith IVOfficer | 6.94K | $45.9K | Jun 4, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Feb 2, 20244:20 PM ET | Joseph H Griffith IVOfficer | 9.71K | $70.0K | Feb 2, 202410b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 28, 20234:19 PM ET | Joseph H Griffith IVOfficer | 6.00K | $60.5K | Dec 28, 202310b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 19, 20234:19 PM ET | Christopher D BrownOfficer | 20.0K | $153.0K | Dec 19, 202310b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 19, 20234:19 PM ET | Joseph H Griffith IVOfficer | 5.58K | $42.7K | Dec 19, 202310b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| May 23, 20235:01 PM ET | Christopher D BrownOfficer | 20.0K | $171.8K | May 23, 202310b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |