Sera Prognostics Inc. Class ASERA
13F holders, Q2 2026 (June 30)At the end of Q2 2026, 47 institutions reported holding Sera Prognostics Inc. Class A (SERA) in their 13F filings, down 9 from Q1 2026. 0 opened new positions and 9 sold out. The largest holders were Baker Bros. Advisors LP ($10.0M), Whetstone Capital Advisors, LLC ($6.0M) and Aberdeen Group plc ($5.0M). 2 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Sera Prognostics Inc. Class A
- CUSIP
- 81749D107
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 0 | $0 |
| Exits | 9 | $5.9M |
All 13F filers, Q1 2026 → Q2 2026: 403,570 shares bought and 3,291,749 shares sold, net −2,888,179 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 47 holders
| Baker Bros. Advisors LP | 0.05% | No change | 5,498,170 | $10.0M |
| Whetstone Capital Advisors, LLC | 1.59% | No change | 3,306,889 | $6.0M |
| Aberdeen Group plc | 0.01% | Add +8.0% | 2,753,525 | $5.0M |
| Vivo Capital, LLC | 0.27% | No change | 1,650,440 | $3.0M |
| Vanguard Capital Management LLC | 0.00% | Add +7.8% | 1,297,792 | $2.4M |
| Captrust Financial Advisors | 0.00% | Reduce -0.2% | 535,755 | $975K |
| Geode Capital Management, LLC | 0.00% | Reduce -4.0% | 348,967 | $635K |
| BlackRock, Inc. | 0.00% | Add +12.9% | 221,369 | $403K |
| AWM Investment Company, Inc. | 0.03% | No change | 207,382 | $377K |
| Vanguard Fiduciary Trust Co. | 0.00% | Add +0.7% | 170,908 | $311K |
| State Street Corp. | 0.00% | No change | 124,792 | $227K |
| Millennium Management | 0.00% | Reduce -19.1% | 73,986 | $135K |
| Perigon Wealth Management, LLC | 0.00% | No change | 72,685 | $132K |
| Northern Trust Corp. | 0.00% | Reduce -28.9% | 68,595 | $125K |
| Bank of New York Mellon Corp | 0.00% | No change | 60,927 | $111K |
| Bridgeway Capital Management, LLC | 0.00% | Add +21.9% | 55,705 | $101K |
| Requisite Capital Management, LLC | 0.02% | No change | 55,648 | $101K |
| Morgan Stanley | 0.00% | Reduce -51.5% | 50,972 | $93K |
| Qube Research & Technologies Ltd | 0.00% | Add +155.4% | 50,871 | $93K |
| Ballentine Partners, LLC | 0.00% | No change | 49,664 | $90K |
| Twelve Points Wealth Management LLC | 0.02% | No change | 43,388 | $79K |
| HighTower Advisors, LLC | 0.00% | No change | 42,234 | $77K |
| Citadel Advisors | 0.00% | Reduce -83.4% | 41,411 | $75K |
| Catalyst Funds Management Pty Ltd | 0.00% | Add +65.0% | 38,890 | $71K |
| Goldman Sachs Group Inc. | 0.00% | Add +76.2% | 32,541 | $59K |
| Dimensional Fund Advisors LP | 0.00% | Add +51.0% | 29,499 | $54K |
| Birch Hill Investment Advisors LLC | 0.00% | No change | 27,293 | $50K |
| Cetera Investment Advisers | 0.00% | No change | 25,000 | $46K |
| XTX Topco Ltd | 0.00% | Add +1.9% | 16,808 | $31K |
| Two Sigma Investments, LP | 0.00% | Reduce -26.1% | 16,221 | $30K |
| Riverview Capital Advisers, LLC | 0.01% | No change | 12,669 | $23K |
| Wagner Wealth Management, LLC | 0.00% | No change | 12,400 | $23K |
| Focus Partners Wealth | 0.00% | No change | 12,156 | $22K |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Reduce -0.5% | 10,504 | $21K |
| UBS Group AG | 0.00% | Reduce -23.9% | 11,309 | $21K |
| Vanguard Global Advisers, LLC | 0.00% | No change | 11,169 | $20K |
| Geneos Wealth Management Inc. | 0.00% | No change | 10,800 | $20K |
| Barclays PLC | 0.00% | Reduce -90.1% | 3,179 | $6K |
| FMR LLC | 0.00% | Reduce -61.4% | 2,539 | $5K |
| Global Retirement Partners, LLC | 0.00% | — | 1,000 | $2K |
| JPMorgan Chase & Co. | 0.00% | No change | 222 | $402 |
| BNP Paribas Financial Markets | 0.00% | Reduce -21.2% | 186 | $339 |
| Nisa Investment Advisors, LLC | 0.00% | No change | 129 | $235 |
| Silicon Valley Capital Partners | 0.00% | No change | 57 | $104 |
| SBI Securities Co., Ltd. | 0.00% | Reduce -42.9% | 4 | $7 |
| Caitong International Asset Management Co., Ltd | 0.00% | No change | 4 | $7 |
| Royal Bank of Canada | 0.00% | Add +4.7% | 45 | $0 |
"% of holder's portfolio" is SERA's weight in each manager's 13F, not the share of Sera Prognostics Inc. Class A the manager owns.