Sera Prognostics Inc
Ownership
Ownership Structure
Who owns Sera Prognostics Inc (SERA)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 72.0% of the shares are freely tradable; institutional investors hold 63.1%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Baker Bros Advisors LP | 13.94 | 5,498,170 | +0.0 | 03/31/2026 |
| Whetstone Capital Advisors, LLC | 8.38 | 3,306,889 | +0.0 | 06/30/2026 |
| Aberdeen Group PLC | 6.98 | 2,753,525 | +7.9 | 06/30/2026 |
| Vivo Capital, LLC | 4.18 | 1,650,440 | +0.0 | 06/30/2026 |
| Vanguard Capital Management, LLC | 3.05 | 1,204,115 | +0.0 | 03/31/2026 |
| CapTrust Financial Advisors | 1.36 | 536,761 | +0.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| abrdn Healthcare Investors | 3.55 | 1,400,105 | +1.0 | 07/31/2026 |
| abrdn Healthcare Opportunities | 3.52 | 1,387,426 | +2.3 | 07/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 2.25 | 887,016 | +0.0 | 07/31/2026 |
| Vanguard Institutional Extnd Mkt Idx Tr | 0.96 | 380,212 | +0.0 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Critchfield Gregory C | Director | 846,886 | 1,778,461 $ | Jul 10, 2026 | direct |
| Lindgardt Zhenya | Chief Executive Officer | 837,848 | 1,759,481 $ | Sep 10, 2026 | direct |
| Jackson Benjamin | General Counsel | 159,566 | 335,089 $ | Sep 10, 2026 | direct |
| Gleason Scott | Chief Financial Officer | 117,924 | 247,640 $ | Aug 31, 2026 | direct |
| Inglis Tiffany Eul Davis | Chief Medical Officer | 91,589 | 192,337 $ | Sep 10, 2026 | direct |
| Mirza Mansoor Raza | Director | 81,937 | 172,068 $ | Jul 10, 2026 | direct |
| Phillips Joshua | Director | 81,691 | 171,551 $ | Jul 10, 2026 | direct |
| Anderson Dyaarl Lee Jr. | Chief Commercial Officer | 76,198 | 160,016 $ | Sep 10, 2026 | direct |
| Kamdar Kim P. | Director | 58,420 | 122,682 $ | Jul 10, 2026 | direct |
| Barlow Jane F | Director | 47,088 | 98,885 $ | Jul 10, 2026 | direct |
| Capone Mark Christopher | Director | 44,379 | 93,196 $ | Jul 10, 2026 | direct |
| Lawrence Sandra AJ | Director | 41,175 | 86,468 $ | Jul 10, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 10, 2026 | Inglis Tiffany Eul Davis | Chief Medical Officer | Sell | 486 | 2.00 | 972 |
| Sep 10, 2026 | Anderson Dyaarl Lee Jr. | Chief Commercial Officer | Sell | 1,800 | 2.00 | 3,600 |
| Sep 10, 2026 | Lindgardt Zhenya | Chief Executive Officer | Sell | 7,022 | 2.00 | 14,044 |
| Sep 10, 2026 | Jackson Benjamin | General Counsel | Sell | 2,190 | 2.00 | 4,380 |
| Sep 8, 2026 | Lindgardt Zhenya | Chief Executive Officer | Sell | 20,139 | 2.00 | 40,278 |
| Aug 31, 2026 | Gleason Scott | Chief Financial Officer | Other | 117,924 | 0.00 | – |
| Jul 10, 2026 | Phillips Joshua | Director | Other | 2,260 | 0.00 | – |
| Jul 10, 2026 | Phillips Joshua | Director | Other | 22,426 | 0.00 | – |
| Jul 10, 2026 | Barlow Jane F | Director | Other | 1,949 | 0.00 | – |
| Jul 10, 2026 | Barlow Jane F | Director | Other | 22,426 | 0.00 | – |
| Jul 10, 2026 | Mirza Mansoor Raza | Director | Other | 1,771 | 0.00 | – |
| Jul 10, 2026 | Mirza Mansoor Raza | Director | Other | 22,426 | 0.00 | – |
| Jul 10, 2026 | Kamdar Kim P. | Director | Other | 3,421 | 0.00 | – |
| Jul 10, 2026 | Kamdar Kim P. | Director | Other | 22,426 | 0.00 | – |
| Jul 10, 2026 | Capone Mark Christopher | Director | Other | 1,975 | 0.00 | – |
| Jul 10, 2026 | Capone Mark Christopher | Director | Other | 42,404 | 0.00 | – |
| Jul 10, 2026 | Lawrence Sandra AJ | Director | Other | 2,276 | 0.00 | – |
| Jul 10, 2026 | Lawrence Sandra AJ | Director | Other | 22,426 | 0.00 | – |
| Jul 10, 2026 | Critchfield Gregory C | Director | Other | 1,594 | 0.00 | – |
| Jul 10, 2026 | Critchfield Gregory C | Director | Other | 22,426 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.