Quick Takeaways
- ARCH Venture Fund VII, L.P. filed SCHEDULE 13G/A for 908 Devices Inc. Common Stock par value $0.001 per share (MASS).
- Disclosed ownership: 15%.
- Date of event: 31 Mar 2026.
ARCH Venture Fund VII, L.P. - 31 Mar 2026 SCHEDULE 13G/A Report for 908 Devices Inc. Common Stock par value $0.001 per share (MASS)
- Filing Manager
- ARCH Venture Fund VII, L.P.
- Reporting Manager
- Keith Crandell
- Symbol
- MASS
- Shares outstanding
- 37,968,732 shares
- Disclosed Ownership
- 5,809,216 shares
- Ownership
- 15%
- Form type
- SCHEDULE 13G/A
- Filing time
- 15 May 2026, 16:05:03 UTC
- Date of event
- 31 Mar 2026
- SEC
- View on sec.gov
Quoteable Key Fact
"ARCH Venture Fund VII, L.P. disclosed 15% ownership in 908 Devices Inc. Common Stock par value $0.001 per share (MASS) on 31 Mar 2026."
What Changed
- No earlier schedule filing is available for direct comparison.
- Current filing was accepted on 15 May 2026, 16:05.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (6)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| ARCH Venture Fund VII, L.P. | 15% | 5,725,045 | 0 | 5,725,045 | /s/ ARCH Venture Partners VII, L.P. | its General Partner | |
| ARCH Venture Partners VII, L.P. | 15% | 5,725,045 | 0 | 5,725,045 | /s/ ARCH Venture Parnters VII, LLC | its General Partner | |
| ARCH Venture Partners VII, LLC | 15% | 5,725,045 | 0 | 5,725,045 | /s/ Mark McDonnell* | Mark McDonnell, as Attorney-in-Fact for Keith Crandell, Managing Director | |
| Keith Crandell | 15% | 5,809,216 | 84,171 | 5,725,045 | /s/ Mark McDonnell* | Mark McDonnell, as Attorney-in-Fact for Keith Crandell | |
| Clinton Bybee | 15% | 5,725,045 | 0 | 5,725,045 | /s/ Mark McDonnell* | Mark McDonnell, as Attorney-in-Fact for Clinton Bybee | |
| Robert Nelsen | 15% | 5,725,045 | 0 | 5,725,045 | /s/ Mark McDonnell* | Mark McDonnell, as Attorney-in-Fact for Robert Nelsen |