Latest Period
Q1 2026
Security Snapshot
SERA PROGNOSTICS, INC. - Class A Common Stock, par value $0.0001 per share (SERA) Institutional Ownership
CUSIP: 81749D107
13F Institutional Holders and Ownership History from Q3 2021 to Q1 2026
Institutions Reporting
55
Shares (Excl. Options)
19,944,838
Price
$2.03
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- Security type / class
- Equity / Class A Common Stock, par value $0.0001 per share
- Symbol
- SERA on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 19,944,838
- Total 13F value
- $40,487,661
- Portfolio coverage rank
- 0%
- Share change
- +2,158,862
- Value change
- +$4,178,612
- Number of holders
- 55
- Shares outstanding
- 38,452,198
- SEC-reported price per share
- $2.15
- Insider filing price
- $2.15
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- SERA - SERA PROGNOSTICS, INC. - Class A Common Stock, par value $0.0001 per share is tracked under CUSIP 81749D107.
- 55 institutions reported positions in Q1 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 56 to 55 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $52,067,649 to $40,487,661.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 55 institutions filings for Q1 2026.
Security key
81749D107
Latest holder period
Q1 2026
13F holders
55
13D/G owners
5
CIK / CUSIP context first
Open Q1 2026 holders
SERA full holder history
SERA PROGNOSTICS, INC. SEC filings
SERA PROGNOSTICS, INC. company facts
SERA PROGNOSTICS, INC. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 81749D107:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
SERA
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BAKER BROS. ADVISORS LP | 16% | $18,418,870 | 5,498,170 | Baker Bros. Advisors LP | 12 Feb 2025 | |||
| Whetstone Capital Advisors, LLC | 8.6% | -6.7% | $7,341,294 | -$339,269 | 3,306,889 | -4.4% | Whetstone Capital Advisors, LLC | 31 Mar 2026 |
| Chione Ltd | 7.6% | $8,727,926 | 2,605,351 | Chione Ltd. | 11 Feb 2025 | |||
| Aberdeen Group plc | 6.1% | $6,325,722 | 2,227,367 | Aberdeen Group plc | 30 Jun 2025 | |||
| Vivo Capital IX, LLC | 4.5% | $5,528,974 | 1,650,440 | Vivo Capital IX, LLC | 31 Mar 2025 |
As of 31 Mar 2026, 55 institutional investors reported holding 19,944,838 shares of SERA PROGNOSTICS, INC. - Class A Common Stock, par value $0.0001 per share (SERA). This represents 52% of the company’s total 38,452,198 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
51%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BAKER BROS. ADVISORS LP | 14% | 5,498,170 | 0% | 0.06% | $11,161,285 |
| Whetstone Capital Advisors, LLC | 8.6% | 3,306,889 | -4.4% | 2.5% | $6,712,985 |
| Aberdeen Group plc | 6.6% | 2,550,775 | +12% | 0.01% | $5,178,073 |
| PSP Research LLC | 6.2% | 2,396,685 | 3.4% | $4,865,271 | |
| Vivo Capital, LLC | 4.3% | 1,650,440 | 0% | 0.28% | $3,350,393 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.1% | 1,204,115 | 0% | 0% | $2,444,353 |
| CAPTRUST FINANCIAL ADVISORS | 1.4% | 536,761 | -0% | 0% | $1,089,625 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.95% | 363,617 | +8.7% | 0% | $738,511 |
| SANDERS MORRIS HARRIS LLC | 0.82% | 314,950 | 0.1% | $639,349 | |
| CITADEL ADVISORS LLC | 0.65% | 248,909 | -65% | 0% | $505,285 |
| AWM Investment Company, Inc. | 0.54% | 207,382 | 0% | 0.05% | $420,985 |
| BlackRock, Inc. | 0.51% | 196,105 | +5% | 0% | $398,093 |
| VANGUARD FIDUCIARY TRUST CO | 0.44% | 169,661 | 0% | 0% | $344,412 |
| STATE STREET CORP | 0.32% | 124,792 | 0% | 0% | $253,328 |
| MORGAN STANLEY | 0.27% | 105,017 | +30% | 0% | $213,184 |
| GSA CAPITAL PARTNERS LLP | 0.27% | 104,973 | -2.1% | 0.01% | $213,000 |
| NORTHERN TRUST CORP | 0.25% | 96,535 | 0% | 0% | $195,966 |
| MILLENNIUM MANAGEMENT LLC | 0.24% | 91,504 | -19% | 0% | $185,753 |
| Perigon Wealth Management, LLC | 0.19% | 72,685 | 0% | 0% | $147,551 |
| Bank of New York Mellon Corp | 0.16% | 60,927 | -19% | 0% | $123,682 |
| Requisite Capital Management, LLC | 0.14% | 55,648 | 0% | 0.02% | $112,965 |
| JANE STREET GROUP, LLC | 0.14% | 53,908 | -22% | 0% | $109,433 |
| Ballentine Partners, LLC | 0.13% | 49,664 | 0% | 0% | $100,818 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 0.12% | 45,705 | 0% | 0% | $92,781 |
| Twelve Points Wealth Management LLC | 0.11% | 43,388 | 0% | 0.02% | $88,078 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
19
Latest
Q1 2026
Rows shown
1-19 of 19
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 19,944,838 | $40,487,661 | +$4,178,612 | $2.03 | 55 |
| 2025 Q4 | 17,640,480 | $52,067,649 | -$1,545,175 | $2.95 | 56 |
| 2025 Q3 | 18,156,273 | $55,563,958 | -$1,352,156 | $3.06 | 61 |
| 2025 Q2 | 18,609,445 | $51,523,609 | -$7,499,389 | $2.77 | 57 |
| 2025 Q1 | 20,231,342 | $74,421,380 | +$7,360,509 | $3.68 | 70 |
| 2024 Q4 | 18,080,486 | $147,052,539 | +$674,056 | $8.14 | 71 |
| 2024 Q3 | 17,992,458 | $140,341,925 | +$11,126,226 | $7.80 | 59 |
| 2024 Q2 | 16,578,359 | $98,177,558 | +$11,498,661 | $5.92 | 65 |
| 2024 Q1 | 14,410,216 | $131,132,861 | +$33,173,495 | $9.10 | 51 |
| 2023 Q4 | 10,917,569 | $65,287,321 | +$31,973,805 | $5.98 | 45 |
| 2023 Q3 | 8,863,155 | $16,485,265 | -$2,039,479 | $1.86 | 27 |
| 2023 Q2 | 9,516,701 | $31,357,944 | -$107,402 | $3.30 | 32 |
| 2023 Q1 | 9,529,218 | $36,496,581 | +$11,033,423 | $3.83 | 35 |
| 2022 Q4 | 7,042,648 | $8,861,320 | -$2,401,722 | $1.26 | 29 |
| 2022 Q3 | 8,696,925 | $13,914,096 | +$64,785 | $1.60 | 31 |
| 2022 Q2 | 8,655,188 | $14,197,000 | -$4,569,945 | $1.64 | 27 |
| 2022 Q1 | 9,651,032 | $36,596,601 | +$1,338,975 | $3.79 | 41 |
| 2021 Q4 | 9,279,441 | $63,795,000 | -$353,446 | $6.87 | 36 |
| 2021 Q3 | 8,651,053 | $96,148,000 | +$96,147,999 | $11.11 | 35 |