# Sera Prognostics, Inc. CLASS A COM

Sera Prognostics, Inc. CLASS A COM is a security (CUSIP 81749D107) tracked across SEC portfolio filings. 56 institutional managers reported $35.5M on Form 13F as of 2026-06-30; 5 registered fund positions totaling $5.8M via N-PORT as of 2026-03-31.

## Summary

- Issuer: Sera Prognostics, Inc.
- Class: CLASS A COM
- CUSIP: 81749D107
- Asset category: EC
- 13F holders: 56
- 13F value: $35.5M
- 13F period: 2026-06-30
- N-PORT fund positions: 5
- N-PORT value: $5.8M
- N-PORT report: 2026-03-31

## Top institutional holders (Form 13F)

_Showing 15 of 56 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| [BAKER BROS. ADVISORS LP](https://search.stillhousedata.com/firm/158149) | NEW YORK, NY | $11.2M | 5,498,170 |
| [Whetstone Capital Advisors, LLC](https://search.stillhousedata.com/firm/155414) | SHAWNEE MISSION, KS | $6.7M | 3,306,889 |
| Aberdeen Group plc | EDINBURGH, X0 | $5.0M | 2,753,525 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $3.7M | 1,239,449 |
| [Vivo Capital, LLC](https://search.stillhousedata.com/firm/159868) | Palo Alto, CA | $3.4M | 1,650,440 |
| [CAPTRUST FINANCIAL ADVISORS](https://search.stillhousedata.com/firm/175112) | RALEIGH, NC | $1.1M | 536,761 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $739K | 363,617 |
| [CITADEL ADVISORS LLC](https://search.stillhousedata.com/firm/148826) | MIAMI, FL | $535K | 248,909 |
| AWM Investment Company, Inc. | NEW YORK, NY | $421K | 207,382 |
| BlackRock, Inc. | New York, NY | $398K | 196,105 |
| STATE STREET CORP | BOSTON, MA | $253K | 124,792 |
| MORGAN STANLEY | NEW YORK, NY | $213K | 105,017 |
| NORTHERN TRUST CORP | CHICAGO, IL | $196K | 96,535 |
| MILLENNIUM MANAGEMENT LLC | NEW YORK, NY | $186K | 91,504 |
| [Perigon Wealth Management, LLC](https://search.stillhousedata.com/firm/131037) | SAN FRANCISCO, CA | $148K | 72,685 |

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| abrdn Healthcare Investors | abrdn Healthcare Investors | $2.6M | 23.14% |
| abrdn Healthcare Opportunities Fund | abrdn Healthcare Opportunities Fund | $2.5M | 35.31% |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $618K | 0.08% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $24K | 0.00% |
| [Blackstone Alternative Multi-Strategy Fund](https://search.stillhousedata.com/fund/S000045538) | Blackstone Alternative Investment Funds | $-1K | -0.00% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/81749D107.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.