908 Devices Inc (MASS)
Healthcare
Medical Devices
—
8.00 $
+4.8%
vs. previous close
Closing price · As of: 31. Jul 2026
Who owns 908 Devices Inc (MASS)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 64.0% of the shares are freely tradable; institutional investors hold 90.0%.
Ownership Structure
Institutional ownership
Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings.
90.0%
Insiders
Share of the stock held by the executives, founders and major shareholders of the company itself.
9.0%
Float
Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders.
64.0%
Short % of float
Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices.
18.1%
Shares Outstanding
Total number of shares issued. Price times share count gives market cap.
38Mio.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| First Light Asset Management, LLC | 16.06 | 6,072,563 | +25.6 | 03/31/2026 |
| Awm Investment Company Inc | 13.75 | 5,199,924 | +0.0 | 03/31/2026 |
| ARK Investment Management LLC | 5.15 | 1,946,685 | -2.0 | 03/31/2026 |
| BlackRock Inc | 4.67 | 1,767,316 | -1.9 | 03/31/2026 |
| Vanguard Group Inc | 3.89 | 1,470,864 | +3.5 | 12/31/2025 |
| Needham Investment Management, LLC | 3.28 | 1,240,000 | +61.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 2.96 | 1,119,236 | +0.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| ARK Genomic Revolution | 4.87 | 1,841,585 | -3.0 | 03/31/2026 |
| ARK Genomic Revolution ETF | 4.71 | 1,782,560 | -0.3 | 05/31/2026 |
| Needham Aggressive Growth Retail | 2.51 | 950,000 | +90.0 | 03/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.