STEM Stem, Inc.
Stem, Inc. (STEM) Institutional Ownership
What the institutions did with STEM 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.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| MARSHALL WACE, LLP | 405.6K | 18.4% |
| VANGUARD CAPITAL MANAGEMENT LLC | 361.2K | 16.4% |
| BlackRock, Inc. | 164.5K | 7.5% |
| Trexquant Investment LP | 110.6K | 5.0% |
| TWO SIGMA INVESTMENTS, LP | 103.2K | 4.7% |
| GSA CAPITAL PARTNERS LLP | 102.3K | 4.6% |
| BNP PARIBAS FINANCIAL MARKETS | 93.1K | 4.2% |
| GEODE CAPITAL MANAGEMENT, LLC | 93.0K | 4.2% |
| ACADIAN ASSET MANAGEMENT LLC | 74.6K | 3.4% |
| RENAISSANCE TECHNOLOGIES LLC | 66.5K | 3.0% |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 59.6K | 2.7% |
| VANGUARD FIDUCIARY TRUST CO | 56.9K | 2.6% |
| Longaeva Partners L.P. | 48.2K | 2.2% |
| STATE STREET CORP | 38.3K | 1.7% |
| MORGAN STANLEY | 37.7K | 1.7% |
| COHEN & STEERS, INC. | 31.9K | 1.4% |
| ROYAL BANK OF CANADA | 29.6K | 1.3% |
| XTX Topco Ltd | 29.5K | 1.3% |
| CITIGROUP INC | 28.5K | 1.3% |
| HSBC HOLDINGS PLC | 28.4K | 1.3% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 26.7K | 1.2% |
| Keyframe Capital Partners, L.P. | 25.9K | 1.2% |
| UBS Group AG | 25.1K | 1.1% |
| CITADEL ADVISORS LLC | 23.7K | 1.1% |
| NOMURA HOLDINGS INC | 23.7K | 1.1% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| MARSHALL WACE, LLP | Increased | 291.3K | 405.6K | +114.3K |
| TWO SIGMA INVESTMENTS, LP | Reduced | 175.4K | 103.2K | -72.2K |
| ACADIAN ASSET MANAGEMENT LLC | Increased | 10.6K | 74.6K | +64.1K |
| Longaeva Partners L.P. | New | 0 | 48.2K | +48.2K |
| BNP PARIBAS FINANCIAL MARKETS | Increased | 53.1K | 93.1K | +40.0K |
| BlackRock, Inc. | Increased | 134.7K | 164.5K | +29.8K |
| UBS Group AG | Reduced | 53.2K | 25.1K | -28.1K |
| CITADEL ADVISORS LLC | New | 0 | 23.7K | +23.7K |
| CANADA PENSION PLAN INVESTMENT BOARD | Sold Out | 21.3K | 0 | -21.3K |
| XTX Topco Ltd | Increased | 10.2K | 29.5K | +19.3K |
| Trexquant Investment LP | Increased | 91.7K | 110.6K | +19.0K |
| Virtu Financial LLC | Sold Out | 18.8K | 0 | -18.8K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 343.8K | 361.2K | +17.4K |
| Centiva Capital, LP | Sold Out | 15.0K | 0 | -15.0K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 13.9K | 26.7K | +12.7K |
| Engineers Gate Manager LP | New | 0 | 12.7K | +12.7K |
| Susquehanna Portfolio Strategies, LLC | Sold Out | 12.0K | 0 | -12.0K |
| GOLDMAN SACHS GROUP INC | New | 0 | 11.3K | +11.3K |
| MORGAN STANLEY | Reduced | 48.0K | 37.7K | -10.4K |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | Reduced | 69.6K | 59.6K | -10.0K |
| Balyasny Asset Management L.P. | New | 0 | 9.7K | +9.7K |
| CITIGROUP INC | Reduced | 37.2K | 28.5K | -8.7K |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 58.6K | 66.5K | +7.9K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 49.7K | 56.9K | +7.2K |
| GSA CAPITAL PARTNERS LLP | Reduced | 108.5K | 102.3K | -6.2K |
| NORTHERN TRUST CORP | Increased | 18.6K | 21.2K | +2.6K |
| IFP Advisors, Inc | Reduced | 1.5K | 5 | -1.5K |
| ROYAL BANK OF CANADA | Increased | 28.2K | 29.6K | +1.4K |
| Tower Research Capital LLC (TRC) | Sold Out | 1.2K | 0 | -1.2K |
| WELLS FARGO & COMPANY/MN | Increased | 3.6K | 4.6K | +1.1K |
| Steward Partners Investment Advisory, LLC | Increased | 2.5K | 3.5K | +1.0K |
| GROUP ONE TRADING LLC | Reduced | 5.0K | 4.1K | -994 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 92.1K | 93.0K | +962 |
| SIMPLEX TRADING, LLC | New | 0 | 840 | +840 |
| JPMORGAN CHASE & CO | New | 0 | 712 | +712 |
| NATIONAL BANK OF CANADA /FI/ | Reduced | 984 | 514 | -470 |
| FMR LLC | Reduced | 838 | 648 | -190 |
| BARCLAYS PLC | New | 0 | 167 | +167 |
| OSAIC HOLDINGS, INC. | Reduced | 823 | 703 | -120 |
| FEDERATED HERMES, INC. | Sold Out | 98 | 0 | -98 |
| TopTier Wealth Management, LLC | Sold Out | 91 | 0 | -91 |
| Optiver Holding B.V. | Sold Out | 87 | 0 | -87 |
| GAMMA Investing LLC | Reduced | 202 | 120 | -82 |
| JONES FINANCIAL COMPANIES LLLP | Reduced | 96 | 36 | -60 |
| Advisory Services Network, LLC | Sold Out | 43 | 0 | -43 |
| Allworth Financial LP | Reduced | 52 | 12 | -40 |
| MAI Capital Management | Sold Out | 37 | 0 | -37 |
| BANK OF AMERICA CORP /DE/ | Reduced | 11.4K | 11.4K | -32 |
| INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC | Reduced | 1.9K | 1.9K | -30 |
| American Capital Advisory, LLC | New | 0 | 24 | +24 |
| Rockefeller Capital Management L.P. | Reduced | 402 | 392 | -10 |
| US BANCORP \DE\ | Reduced | 66 | 60 | -6 |
| Sound Income Strategies, LLC | Sold Out | 5 | 0 | -5 |
| STATE STREET CORP | Reduced | 38.3K | 38.3K | -1 |
| SBI Securities Co., Ltd. | Increased | 148 | 149 | +1 |
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.