SERA Sera Prognostics, Inc.
Sera Prognostics, Inc. (SERA) Institutional Ownership
What the institutions did with SERA 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.
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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 |
|---|---|---|
| BAKER BROS. ADVISORS LP | 5.5M | 32.2% |
| Whetstone Capital Advisors, LLC | 3.3M | 19.4% |
| Aberdeen Group plc | 2.8M | 16.1% |
| Vivo Capital, LLC | 1.7M | 9.7% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.3M | 7.6% |
| CAPTRUST FINANCIAL ADVISORS | 535.8K | 3.1% |
| GEODE CAPITAL MANAGEMENT, LLC | 349.0K | 2.0% |
| BlackRock, Inc. | 221.4K | 1.3% |
| AWM Investment Company, Inc. | 207.4K | 1.2% |
| VANGUARD FIDUCIARY TRUST CO | 170.9K | 1.0% |
| STATE STREET CORP | 124.8K | 0.7% |
| MILLENNIUM MANAGEMENT LLC | 74.0K | 0.4% |
| Perigon Wealth Management, LLC | 72.7K | 0.4% |
| NORTHERN TRUST CORP | 68.6K | 0.4% |
| Bank of New York Mellon Corp | 60.9K | 0.4% |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 55.7K | 0.3% |
| Requisite Capital Management, LLC | 55.6K | 0.3% |
| MORGAN STANLEY | 51.0K | 0.3% |
| Qube Research & Technologies Ltd | 50.9K | 0.3% |
| Ballentine Partners, LLC | 49.7K | 0.3% |
| Twelve Points Wealth Management LLC | 43.4K | 0.3% |
| HighTower Advisors, LLC | 42.2K | 0.2% |
| CITADEL ADVISORS LLC | 41.4K | 0.2% |
| Catalyst Funds Management Pty Ltd | 38.9K | 0.2% |
| GOLDMAN SACHS GROUP INC | 32.5K | 0.2% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| PSP Research LLC | Sold Out | 2.4M | 0 | -2.4M |
| SANDERS MORRIS HARRIS LLC | Sold Out | 315.0K | 0 | -315.0K |
| CITADEL ADVISORS LLC | Reduced | 248.9K | 41.4K | -207.5K |
| Aberdeen Group plc | Increased | 2.6M | 2.8M | +202.8K |
| GSA CAPITAL PARTNERS LLP | Sold Out | 105.0K | 0 | -105.0K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 1.2M | 1.3M | +93.7K |
| MORGAN STANLEY | Reduced | 105.0K | 51.0K | -54.0K |
| JANE STREET GROUP, LLC | Sold Out | 53.9K | 0 | -53.9K |
| Squarepoint Ops LLC | Sold Out | 31.4K | 0 | -31.4K |
| Qube Research & Technologies Ltd | Increased | 19.9K | 50.9K | +31.0K |
| BARCLAYS PLC | Reduced | 32.0K | 3.2K | -28.8K |
| NORTHERN TRUST CORP | Reduced | 96.5K | 68.6K | -27.9K |
| BlackRock, Inc. | Increased | 196.1K | 221.4K | +25.3K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 91.5K | 74.0K | -17.5K |
| Catalyst Funds Management Pty Ltd | Increased | 23.6K | 38.9K | +15.3K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 363.6K | 349.0K | -14.7K |
| GOLDMAN SACHS GROUP INC | Increased | 18.5K | 32.5K | +14.1K |
| Arkadios Wealth Advisors | Sold Out | 12.4K | 0 | -12.4K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Sold Out | 12.1K | 0 | -12.1K |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | Increased | 45.7K | 55.7K | +10.0K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 19.5K | 29.5K | +10.0K |
| TWO SIGMA INVESTMENTS, LP | Reduced | 22.0K | 16.2K | -5.7K |
| FMR LLC | Reduced | 6.6K | 2.5K | -4.0K |
| UBS Group AG | Reduced | 14.9K | 11.3K | -3.6K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 169.7K | 170.9K | +1.2K |
| CAPTRUST FINANCIAL ADVISORS | Reduced | 536.8K | 535.8K | -1.0K |
| Optiver Holding B.V. | Sold Out | 412 | 0 | -412 |
| XTX Topco Ltd | Increased | 16.5K | 16.8K | +317 |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | Reduced | 10.6K | 10.5K | -54 |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 236 | 186 | -50 |
| Advisory Services Network, LLC | Sold Out | 19 | 0 | -19 |
| SBI Securities Co., Ltd. | Reduced | 7 | 4 | -3 |
| ROYAL BANK OF CANADA | Increased | 43 | 45 | +2 |
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.