As of November 7, 2026, 908 Devices Inc. is a publicly traded company (Nasdaq: MASS); its largest reported holder is Mathew P. Arens, with 17.09% on Schedule 13G/A of February 17, 2026, then First Light Asset Management, LLC (12.93%). The largest insider holding is Keith Crandell, a director, with 5,764,419 shares (13.9% of shares outstanding), per Form 4 of June 12, 2026 (Schedule 13G/A, February 17, 2026).
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Is 908 Devices Inc. a real, registered company?
- 908 Devices Inc. files with the SEC under CIK 1555279 (its SEC filings).
- Its shares are listed under the ticker MASS on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Burlington, Massachusetts, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under 908 Devices Inc. in our court records and SEC 8-K records (as of 2026-11-07).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Keith Crandell (filed 2026-08-14).
Who are 908 Devices Inc.'s owners and officers?
908 Devices Inc.: incorporated in Delaware; business address in Burlington, Massachusetts; industry Laboratory Analytical Instruments (Schedule 13G/A, 2026-10-27).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-10-27 | Blackrock, Inc. | 4.9% |
| Schedule 13G/A, 2026-08-14 | Keith Crandell | 14.1% |
| Schedule 13G/A, 2026-08-14 | Awm Investment Company, Inc. | 11.8% |
| Schedule 13G/A, 2026-08-14 | Ark Investment Management LLC | 5.32% |
| Schedule 13G, 2026-07-27 | Blackrock, Inc. | 5.1% |
| Schedule 13G/A, 2026-06-05 | Ark Investment Management LLC | 4.94% |
| Schedule 13G/A, 2026-05-15 | Keith Crandell | 15.3% |
| Schedule 13G/A, 2026-02-17 | Mathew P. Arens | 17.09% |
| Schedule 13G, 2026-02-09 | State Street Corporation | 1.6% |
| Schedule 13G/A, 2025-12-05 | First Light Asset Management, LLC | 12.93% |
| Schedule 13G, 2025-11-14 | First Light Asset Management, LLC | 9.84% |
| Schedule 13G/A, 2025-11-04 | Ark Investment Management LLC | 5.41% |
Questions about who owns 908 Devices Inc.
Who owns 908 Devices Inc.?
On this page, 5 holders' latest ownership filings report 5% or more of 908 Devices Inc.: Mathew P. Arens (17.09%, Schedule 13G/A, filed 2026-02-17), Keith Crandell (14.1%, Schedule 13G/A, filed 2026-08-14), First Light Asset Management, LLC (12.93%, Schedule 13G/A, filed 2025-12-05), Awm Investment Company, Inc. (11.8%, Schedule 13G/A, filed 2026-08-14) and Ark Investment Management LLC (5.32%, Schedule 13G/A, filed 2026-08-14).
Who are the largest shareholders of 908 Devices Inc.?
By the share each holder's latest filing reports, the largest holders of 908 Devices Inc. on this page are Mathew P. Arens (17.09%), Keith Crandell (14.1%) and First Light Asset Management, LLC (12.93%).
When did Mathew P. Arens buy into 908 Devices Inc.?
The filings give report dates, not purchase dates. The earliest filing from Mathew P. Arens on this page is the Schedule 13G/A, filed 2026-02-17, reporting 17.09%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 12 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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What the Full Report on 908 Devices Inc. covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
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Which insiders own 908 Devices Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , a director: 5,764,419 shares (13.9% of shares outstanding), 39,374 held directly and 5,725,045 indirectly (Form 4, 2026-06-12).
- AWM Investment Company, Inc., a 10% owner: 4,736,773 shares (11.5% of shares outstanding), held indirectly through By Limited Partnership (Form 4, 2026-10-01).
- , the chief executive and president: 1,097,191 shares (2.7% of shares outstanding), 555,968 held directly and 541,223 indirectly (Form 4, 2026-08-17).
- , a director: 775,559 shares (1.9% of shares outstanding) (Form 4, 2026-11-06).
- , a director: 495,065 shares (1.2% of shares outstanding), 165,390 held directly and 329,675 indirectly (Form 4, 2026-06-12).
Shares outstanding: 41,333,705 as of 2026-08-07, from the company's latest SEC cover page.
How much has 908 Devices Inc. raised?
Acquisitions reported on Form 8-K, Item 2.01: acquired NIRLAB SA (2026-05-06).
Keep reading
More on 908 Devices Inc. and the records around it.
908 Devices Inc. elsewhere on the record
- 5%+ stake filings Oct 2026
- Acquisition May 2026
Companies that share a holder
- First Light Asset Management, LLC also filed stake reports on 12 other companies: NeuroPace Inc (Sep 2026), Neogenomics, Inc. (Aug 2026), PALVELLA THERAPEUTICS, INC. (Aug 2026)
- ARK Investment Management LLC also filed stake reports on 20 other companies: Tempus AI, Inc. (Nov 2026), 10x Genomics, Inc. (Oct 2026), Twist Bioscience Corp (Sep 2026)
- AWM Investment Company, Inc. also filed stake reports on 32 other companies: Brazil Potash Corp. (Aug 2026), EVERSPIN TECHNOLOGIES INC. (Aug 2026), LIBERTY DEFENSE HOLDINGS, LTD. (Aug 2026)
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