Sera Prognostics Inc. Class ASERA
13F holders, Q1 2026 (March 31)56holders −1
8new positions
11sold out
2famous investors
$2.03avg. 13F price*
At the end of Q1 2026, 56 institutions reported holding Sera Prognostics Inc. Class A (SERA) in their 13F filings, down 1 from Q4 2025. 8 opened new positions and 11 sold out. The largest holders were Baker Bros. Advisors LP ($11.2M), Whetstone Capital Advisors, LLC ($6.7M) and Aberdeen Group plc ($5.2M). 2 famous investors held it, including Ken Griffin (0.0% of Citadel Advisors's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Sera Prognostics Inc. Class A
- CUSIP
- 81749D107
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 8 | $5.6M |
| Exits | 11 | $662K |
All 13F filers, Q4 2025 → Q1 2026: 3,100,630 shares bought and 941,765 shares sold, net +2,158,865 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 56 holders
| Baker Bros. Advisors LP | 0.06% | No change | 5,498,170 | $11.2M |
| Whetstone Capital Advisors, LLC | 2.53% | Reduce -4.4% | 3,306,889 | $6.7M |
| Aberdeen Group plc | 0.01% | Add +11.9% | 2,550,775 | $5.2M |
| PSP Research LLC | 3.44% | New | 2,396,685 | $4.9M |
| Vivo Capital, LLC | 0.28% | No change | 1,650,440 | $3.4M |
| Vanguard Capital Management LLC | 0.00% | — | 1,204,115 | $2.4M |
| Captrust Financial Advisors | 0.00% | Reduce 0.0% | 536,761 | $1.1M |
| Geode Capital Management, LLC | 0.00% | Add +8.7% | 363,617 | $739K |
| Sanders Morris Harris LLC | 0.10% | New | 314,950 | $639K |
| Citadel Advisors | 0.00% | Reduce -64.8% | 248,909 | $505K |
| AWM Investment Company, Inc. | 0.05% | No change | 207,382 | $421K |
| BlackRock, Inc. | 0.00% | Add +5.0% | 196,105 | $398K |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 169,661 | $344K |
| State Street Corp. | 0.00% | No change | 124,792 | $253K |
| Morgan Stanley | 0.00% | Add +29.7% | 105,017 | $213K |
| Gsa Capital Partners LLP | 0.01% | Reduce -2.1% | 104,973 | $213K |
| Northern Trust Corp. | 0.00% | No change | 96,535 | $196K |
| Millennium Management | 0.00% | Reduce -19.1% | 91,504 | $186K |
| Perigon Wealth Management, LLC | 0.00% | No change | 72,685 | $148K |
| Bank of New York Mellon Corp | 0.00% | Reduce -19.1% | 60,927 | $124K |
| Requisite Capital Management, LLC | 0.02% | No change | 55,648 | $113K |
| Jane Street Group, LLC | 0.00% | Reduce -21.7% | 53,908 | $109K |
| Ballentine Partners, LLC | 0.00% | No change | 49,664 | $101K |
| Bridgeway Capital Management, LLC | 0.00% | No change | 45,705 | $93K |
| Twelve Points Wealth Management LLC | 0.02% | No change | 43,388 | $88K |
| HighTower Advisors, LLC | 0.00% | No change | 42,234 | $86K |
| Barclays PLC | 0.00% | Reduce -12.9% | 31,967 | $65K |
| Squarepoint Ops LLC | 0.00% | Reduce -13.5% | 31,428 | $64K |
| Birch Hill Investment Advisors LLC | 0.00% | No change | 27,293 | $55K |
| Cetera Investment Advisers | 0.00% | No change | 25,000 | $51K |
| Catalyst Funds Management Pty Ltd | 0.01% | New | 23,564 | $48K |
| Two Sigma Investments, LP | 0.00% | No change | 21,964 | $45K |
| Qube Research & Technologies Ltd | 0.00% | Reduce -31.3% | 19,917 | $40K |
| Dimensional Fund Advisors LP | 0.00% | Reduce -14.8% | 19,535 | $39K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -35.4% | 18,472 | $37K |
| XTX Topco Ltd | 0.00% | New | 16,491 | $33K |
| UBS Group AG | 0.00% | Reduce -41.0% | 14,869 | $30K |
| Riverview Capital Advisers, LLC | 0.01% | No change | 12,669 | $26K |
| Wagner Wealth Management, LLC | 0.01% | Reduce -2.3% | 12,400 | $25K |
| Arkadios Wealth Advisors | 0.00% | New | 12,400 | $25K |
| Focus Partners Wealth | 0.00% | No change | 12,156 | $25K |
| Charles Schwab Investment Management Inc. | 0.00% | No change | 12,085 | $25K |
| Vanguard Global Advisers, LLC | 0.00% | — | 11,169 | $23K |
| Geneos Wealth Management Inc. | 0.00% | Add +38.5% | 10,800 | $22K |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Reduce -0.8% | 10,558 | $21K |
| FMR LLC | 0.00% | Reduce -55.7% | 6,573 | $13K |
| Cwm, LLC | 0.00% | Reduce -0.3% | 1,003 | $2K |
| Optiver Holding B.V. | 0.00% | No change | 412 | $836 |
| BNP Paribas Financial Markets | 0.00% | No change | 236 | $479 |
| JPMorgan Chase & Co. | 0.00% | No change | 222 | $426 |
| Nisa Investment Advisors, LLC | 0.00% | No change | 129 | $262 |
| Silicon Valley Capital Partners | 0.00% | New | 57 | $116 |
| Advisory Services Network, LLC | 0.00% | New | 19 | $39 |
| SBI Securities Co., Ltd. | 0.00% | No change | 7 | $14 |
| Caitong International Asset Management Co., Ltd | 0.00% | New | 4 | $8 |
| Royal Bank of Canada | 0.00% | Add +7.5% | 43 | $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.