MASS 908 Devices Inc.
908 Devices Inc. (MASS) Institutional Ownership
What the institutions did with MASS last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| First Light Asset Management, LLC | 6.3M | 22.4% |
| AWM Investment Company, Inc. | 4.9M | 17.4% |
| ARK Investment Management LLC | 2.0M | 7.2% |
| BlackRock, Inc. | 1.9M | 6.9% |
| NEEDHAM INVESTMENT MANAGEMENT LLC | 1.8M | 6.5% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.3M | 4.6% |
| First Eagle Investment Management, LLC | 930.0K | 3.3% |
| GEODE CAPITAL MANAGEMENT, LLC | 761.8K | 2.7% |
| Granahan Investment Management, LLC | 692.1K | 2.5% |
| STATE STREET CORP | 606.6K | 2.2% |
| ESSEX INVESTMENT MANAGEMENT CO LLC | 470.2K | 1.7% |
| MORGAN STANLEY | 404.1K | 1.4% |
| Prescott Group Capital Management, L.L.C. | 361.6K | 1.3% |
| Meros Investment Management, LP | 361.4K | 1.3% |
| AMERICAN CENTURY COMPANIES INC | 359.8K | 1.3% |
| HighMark Wealth Management LLC | 339.8K | 1.2% |
| NORTHERN TRUST CORP | 266.4K | 0.9% |
| BANK OF AMERICA CORP /DE/ | 251.0K | 0.9% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 233.9K | 0.8% |
| Sumitomo Mitsui Trust Group, Inc. | 228.7K | 0.8% |
| Amova Asset Management Americas, Inc. | 228.7K | 0.8% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 194.9K | 0.7% |
| RENAISSANCE TECHNOLOGIES LLC | 191.9K | 0.7% |
| VANGUARD FIDUCIARY TRUST CO | 186.1K | 0.7% |
| RAYMOND JAMES FINANCIAL INC | 167.3K | 0.6% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| NEEDHAM INVESTMENT MANAGEMENT LLC | Increased | 1.2M | 1.8M | +580.6K |
| Tao Capital Management LP | Sold Out | 569.0K | 0 | -569.0K |
| AWM Investment Company, Inc. | Reduced | 5.2M | 4.9M | -320.2K |
| AMERICAN CENTURY COMPANIES INC | Increased | 55.9K | 359.8K | +304.0K |
| BANK OF AMERICA CORP /DE/ | Increased | 25.1K | 251.0K | +225.9K |
| First Light Asset Management, LLC | Increased | 6.1M | 6.3M | +210.2K |
| GSA CAPITAL PARTNERS LLP | Reduced | 251.0K | 49.2K | -201.9K |
| BlackRock, Inc. | Increased | 1.8M | 1.9M | +176.9K |
| Squarepoint Ops LLC | Reduced | 213.2K | 37.7K | -175.5K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 1.1M | 1.3M | +172.3K |
| MILLENNIUM MANAGEMENT LLC | Sold Out | 142.4K | 0 | -142.4K |
| First Eagle Investment Management, LLC | Increased | 803.6K | 930.0K | +126.4K |
| SEI INVESTMENTS CO | Reduced | 164.9K | 77.7K | -87.2K |
| CITADEL ADVISORS LLC | Reduced | 144.5K | 62.7K | -81.8K |
| Campbell & CO Investment Adviser LLC | Increased | 29.7K | 111.2K | +81.5K |
| ARK Investment Management LLC | Increased | 1.9M | 2.0M | +81.2K |
| D. E. Shaw & Co., Inc. | New | 0 | 75.4K | +75.4K |
| Trexquant Investment LP | Sold Out | 73.2K | 0 | -73.2K |
| Cassaday & Co Wealth Management LLC | Sold Out | 71.6K | 0 | -71.6K |
| ACADIAN ASSET MANAGEMENT LLC | New | 0 | 70.4K | +70.4K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 695.5K | 761.8K | +66.3K |
| TWO SIGMA INVESTMENTS, LP | Sold Out | 44.1K | 0 | -44.1K |
| XTX Topco Ltd | Sold Out | 41.4K | 0 | -41.4K |
| Sumitomo Mitsui Trust Group, Inc. | Reduced | 269.9K | 228.7K | -41.2K |
| Amova Asset Management Americas, Inc. | Reduced | 269.9K | 228.7K | -41.2K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.