Sera Prognostics
SERA on Nasdaq. Market value $83m.
Should I look at this?
We have not checked this company yet
This is not advice.
Who owns it
None of the long-term investors we follow own it. 46 funds in all.
Largest holders overall
- Baker Bros. Advisors LP$10m
- Whetstone Capital Advisors$6m
- Aberdeen Group$5mAdded
- Vivo Capital$3m
- Vanguard Capital Management$2mAdded
- Captrust Financial Advisors$975,074
- Geode Capital Management$635,473Cut
- BlackRock$402,891Added
- AWM Investment Company$377,435
- Vanguard Fiduciary Trust$311,053
From 13F filings for the quarter ended 30 June 2026.
Big holders and activists
4 investors own more than 5%.
- Baker Bros. Advisors LPPassive investorat least 16.1%(filed with 3 related holders)Since 12 February 2025
What they said
The disclosure in Item 3, Item 5 and Item 6 below are incorporated herein by reference. On February 10, 2025, the Issuer entered into an underwriting agreement (the "Underwriting Agreement") with Jefferies LLC, TD Securities (USA) LLC and William Blair & Company, L.L.C., as…
Read the filing - Whetstone Capital Advisors, LLCPassive investorat least 8.6%−0.6 pts(filed with 1 related holder)Since 31 March 2026
- Chione Ltd.Passive investorat least 7.6%(filed with 4 related holders)Since 11 February 2025
- Aberdeen Group plcPassive investorat least 7.2%+1.1 pts(filed with 1 related holder)Since 30 June 2026
- Vivo Capital IX, LLCPassive investorSold down below 5%Since 31 March 2025
- RA Capital Management, L.P.Passive investorSold down below 5%Since 30 June 2025
| Holder | Stake | Since | |
|---|---|---|---|
Baker Bros. Advisors LP Passive investor | at least 16.1% (filed with 3 related holders) | 12 February 2025 | What they saidThe disclosure in Item 3, Item 5 and Item 6 below are incorporated herein by reference. On February 10, 2025, the Issuer entered into an underwriting agreement (the "Underwriting Agreement") with Jefferies LLC, TD Securities (USA) LLC and William Blair & Company, L.L.C., as… Read the filing |
Whetstone Capital Advisors, LLC Passive investor | at least 8.6%−0.6 pts (filed with 1 related holder) | 31 March 2026 | |
Chione Ltd. Passive investor | at least 7.6% (filed with 4 related holders) | 11 February 2025 | |
Aberdeen Group plc Passive investor | at least 7.2%+1.1 pts (filed with 1 related holder) | 30 June 2026 | |
Vivo Capital IX, LLC Passive investor | Sold down below 5% | 31 March 2025 | |
RA Capital Management, L.P. Passive investor | Sold down below 5% | 30 June 2025 |
From Schedule 13D and 13G filings: anyone owning more than 5% must file one.
What insiders did
No insider bought shares on the open market in the last 12 months. 10 sold $649,962, $53,105 of it under preset trading plans.
- Inglis Tiffany Eul DavisChief Medical OfficerSold
- Date
- 10 September 2026
- Shares
- 486
- Price
- $2.00
- Value
- $972
- Anderson Dyaarl Lee Jr.Chief Commercial OfficerSold
- Date
- 10 September 2026
- Shares
- 1,800
- Price
- $2.00
- Value
- $3,600
- Lindgardt ZhenyaChief Executive Officer, DirectorSold
- Date
- 10 September 2026
- Shares
- 7,022
- Price
- $2.00
- Value
- $14,044
- Jackson BenjaminGeneral CounselSold
- Date
- 10 September 2026
- Shares
- 2,190
- Price
- $2.00
- Value
- $4,380
- Lindgardt ZhenyaChief Executive Officer, DirectorSold
- Date
- 8 September 2026
- Shares
- 20,139
- Price
- $2.00
- Value
- $40,278
- Inglis Tiffany Eul DavisChief Medical OfficerSold
- Date
- 11 June 2026
- Shares
- 362
- Price
- $2.01
- Value
- $728
- Anderson Dyaarl Lee Jr.Chief Commercial OfficerSold
- Date
- 11 June 2026
- Shares
- 4,739
- Price
- $2.01
- Value
- $9,525
- Aerts AustinChief Financial OfficerSold
- Date
- 11 June 2026
- Shares
- 2,037
- Price
- $2.01
- Value
- $4,094
- Lindgardt ZhenyaChief Executive Officer, DirectorSold
- Date
- 11 June 2026
- Shares
- 6,990
- Price
- $2.01
- Value
- $14,050
- Jackson BenjaminGeneral CounselSold
- Date
- 11 June 2026
- Shares
- 2,179
- Price
- $2.01
- Value
- $4,380
| Date | Who | Did | Shares | Price | Value |
|---|---|---|---|---|---|
| 10 September 2026 | Inglis Tiffany Eul Davis Chief Medical Officer | Sold | 486 | $2.00 | $972 |
| 10 September 2026 | Anderson Dyaarl Lee Jr. Chief Commercial Officer | Sold | 1,800 | $2.00 | $3,600 |
| 10 September 2026 | Lindgardt Zhenya Chief Executive Officer, Director | Sold | 7,022 | $2.00 | $14,044 |
| 10 September 2026 | Jackson Benjamin General Counsel | Sold | 2,190 | $2.00 | $4,380 |
| 8 September 2026 | Lindgardt Zhenya Chief Executive Officer, Director | Sold | 20,139 | $2.00 | $40,278 |
| 11 June 2026 | Inglis Tiffany Eul Davis Chief Medical Officer | Sold | 362 | $2.01 | $728 |
| 11 June 2026 | Anderson Dyaarl Lee Jr. Chief Commercial Officer | Sold | 4,739 | $2.01 | $9,525 |
| 11 June 2026 | Aerts Austin Chief Financial Officer | Sold | 2,037 | $2.01 | $4,094 |
| 11 June 2026 | Lindgardt Zhenya Chief Executive Officer, Director | Sold | 6,990 | $2.01 | $14,050 |
| 11 June 2026 | Jackson Benjamin General Counsel | Sold | 2,179 | $2.01 | $4,380 |
From Form 4 filings: insiders must report trades in their own company's shares within two days.
The deep dive
Everything above is arithmetic on public filings. The deep dive reads the last ten years of annual reports, the proxy statements, and the earnings calls, then argues the case the way Buffett, Klarman, and Hohn would, and checks every claim against the source.
- What the business is worth, as a range, and the margin of safety at today’s price
- Prices to start buying, buy, and buy hard
- The three things that would make this a mistake
- Every number footnoted to the filing it came from
Your first deep dive is free.
Not advice. Numbers on this page come from SEC filings and are updated each night; prices are updated again after the US market closes. The five-year figures are rounded.