Who owns 908 Devices Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from SEC filings.
Institutional ownership of MASS from SEC Form 13F filings across 85 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 85 institutions disclosed 13.6M shares of 908 Devices Inc. worth $117.9M — about 36.2% of shares outstanding; the largest disclosed holder is ARK Investment Management LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
85
13F holders
$117.9M
value, 2026 filers
36.2%
of shares outstanding (13.6M sh)
12
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of MASS's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | ARK Investment Management LLC | 2.0M | $17.6M | 0.1% | 5.4% | +4.2% |
| 2 | BlackRock, Inc. | 1.9M | $16.9M | 0.0% | 5.2% | +10.0% |
| 3 | NEEDHAM INVESTMENT MANAGEMENT LLC | 1.8M | $15.8M | 0.5% | 4.8% | +46.8% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 1.3M | $11.2M | 0.0% | 3.4% | -42.3% |
| 5 | First Eagle Investment Management, LLC | 929,985 | $8.1M | 0.0% | 2.5% | -42.1% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 761,797 | $6.6M | 0.0% | 2% | +9.5% |
| 7 | MORGAN STANLEY | 404,078 | $3.5M | 0.0% | 1.1% | +8.3% |
| 8 | AMERICAN CENTURY COMPANIES INC | 359,848 | $3.1M | 0.0% | 1% | +543.8% |
| 9 | HighMark Wealth Management LLC | 339,783 | $3.0M | 1.0% | 0.9% | +6.4% |
| 10 | NORTHERN TRUST CORP | 266,417 | $2.3M | 0.0% | 0.7% | +10.4% |
| 11 | BANK OF AMERICA CORP /DE/ | 251,027 | $2.2M | 0.0% | 0.7% | +901.0% |
| 12 | Sixth Street Partners Management Company, L.P.NEW | 233,892 | $2.0M | 0.4% | 0.6% | new |
| 13 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 233,892 | $2.0M | 0.0% | 0.6% | +1.9% |
| 14 | Sumitomo Mitsui Trust Group, Inc. | 228,681 | $2.0M | 0.0% | 0.6% | -15.3% |
| 15 | Amova Asset Management Americas, Inc. | 228,681 | $2.0M | 0.0% | 0.6% | -15.3% |
| 16 | VANGUARD PORTFOLIO MANAGEMENT LLC | 194,858 | $1.7M | 0.0% | 0.5% | +19.0% |
| 17 | VANGUARD FIDUCIARY TRUST CO | 186,056 | $1.6M | 0.0% | 0.5% | +3.2% |
| 18 | RAYMOND JAMES FINANCIAL INC | 167,348 | $1.5M | 0.0% | 0.4% | -5.2% |
| 19 | Russell Investments Group, Ltd. | 149,655 | $1.3M | 0.0% | 0.4% | +3.0% |
| 20 | Nuveen, LLC | 141,727 | $1.2M | 0.0% | 0.4% | +40.2% |
| 21 | Mitsubishi UFJ Asset Management Co., Ltd. | 110,557 | $961,846 | 0.0% | 0.3% | -16.5% |
| 22 | IQ EQ FUND MANAGEMENT (IRELAND) Ltd | 98,689 | $858,594 | 0.1% | 0.3% | +9.9% |
| 23 | BANK OF MONTREAL /CAN/ | 87,346 | $759,911 | 0.0% | 0.2% | 0.0% |
| 24 | SEI INVESTMENTS CO | 77,719 | $676,155 | 0.0% | 0.2% | -52.9% |
| 25 | UBS Group AG | 77,416 | $673,519 | 0.0% | 0.2% | -17.2% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.