SERANasdaqServices-Medical LaboratoriesFiscal year ends December 31
SERA PROGNOSTICS, INC.
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 12, 2026
$2.03−0.03 (-1.46%)
Close on Oct 19, 2026
- Market cap
- $102.47M
- P/E (TTM)
- –
- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
43.2%
17M of 39M shares
Institutional holders
46
1 new, 9 sold out
Net institutional buying
-3M
In Q2 2026
Insider trades, 12 months
0 buys · 51 sales
Net sold $642.88K
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| Julian C. Baker | 5,498,170 | 16.10% | 13D (active) | Feb 12, 2025 |
| David Atterbury | 3,632,371 | 9.90% | 13G (passive) | Jun 30, 2025 |
| Whetstone Capital Advisors, LLC | 3,306,889 | 8.60% | 13G (passive) amendment | Mar 31, 2026 |
| Aberdeen Group plc | 2,753,525 | 7.21% | 13G (passive) amendment | Jun 30, 2026 |
| Andreas Hadjimichael | 2,605,351 | 7.60% | 13D (active) amendment | Feb 11, 2025 |
| abrdn Inc. | 2,227,367 | 6.07% | 13G (passive) | Jun 30, 2025 |
| Dr. Yair C. Schindel | 1,911,332 | 5.73% | 13G (passive) amendment | Sep 30, 2024 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of SERA | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| Baker Bros. Advisors LP | 5,498,170 | 13.94% | $10.01M | – | 0.05% |
| Whetstone Capital Advisors, LLC | 3,306,889 | 8.38% | $6.02M | – | 1.58% |
| abrdn plc | 2,753,525 | 6.98% | $5.01M | +202,750 | 0.01% |
| Vivo Capital, LLC | 1,650,440 | 4.18% | $3.00M | – | 0.27% |
| Vanguard Capital Management LLC | 1,297,792 | 3.29% | $2.36M | +93,677 | 0.00% |
| Captrust Financial Advisors | 535,755 | 1.36% | $975.07K | −1,006 | 0.00% |
| Geode Capital Management, LLC | 348,967 | 0.88% | $635.47K | −14,650 | 0.00% |
| BlackRock, Inc. | 221,369 | 0.56% | $402.89K | +25,264 | 0.00% |
| AWM Investment Company, Inc. | 207,382 | 0.53% | $377.44K | – | 0.03% |
| Vanguard Fiduciary Trust Co | 170,908 | 0.43% | $311.05K | +1,247 | 0.00% |
| State Street Corp | 124,792 | 0.32% | $227.12K | – | 0.00% |
| Millennium Management LLC | 73,986 | 0.19% | $134.66K | −17,518 | 0.00% |
| Perigon Wealth Management, LLC | 72,685 | 0.18% | $132.29K | – | 0.00% |
| Northern Trust Corp | 68,595 | 0.17% | $124.84K | −27,940 | 0.00% |
| Bank of New York Mellon Corp | 60,927 | 0.15% | $110.89K | – | 0.00% |
| Bridgeway Capital Management, LLC | 55,705 | 0.14% | $101.38K | +10,000 | 0.00% |
| Requisite Capital Management, LLC | 55,648 | 0.14% | $101.28K | – | 0.02% |
| Morgan Stanley | 50,972 | 0.13% | $92.77K | −54,045 | 0.00% |
| Qube Research & Technologies Ltd | 50,871 | 0.13% | $92.59K | +30,954 | 0.00% |
| Ballentine Partners, LLC | 49,664 | 0.13% | $90.39K | – | 0.00% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 46 | 17M | 43.2% | 1 / 11 | 13 / 9 | 0M | 3M |
| Q1 2026 | 56 | 20M | 50.6% | 11 / 6 | 17 / 11 | 4M | 1M |
| Q4 2025 | 57 | 18M | 45.0% | 6 / 15 | 15 / 8 | 0M | 1M |
| Q3 2025 | 62 | 18M | 46.0% | 12 / 17 | 11 / 9 | 0M | 1M |
| Q2 2025 | 59 | 19M | 47.2% | 13 / 14 | 26 / 24 | 5M | 7M |
| Q1 2025 | 71 | 20M | 51.3% | 9 / 24 | 21 / 10 | 3M | 1M |
| Q4 2024 | 73 | 18M | 45.9% | 18 / 28 | 12 / 6 | 1M | 2M |
| Q3 2024 | 61 | 19M | 47.9% | 14 / 18 | 12 / 17 | 4M | 1M |
| Q2 2024 | 65 | 17M | 42.1% | 25 / 18 | 15 / 12 | 4M | 2M |
| Q1 2024 | 52 | 15M | 37.5% | 17 / 18 | 8 / 11 | 5M | 1M |
| Q4 2023 | 47 | 11M | 28.2% | 23 / 13 | 7 / 3 | 6M | 1M |
| Q3 2023 | 28 | 9M | 22.5% | 1 / 7 | 6 / 6 | 0M | 1M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of SERA | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index Fund | 887,016 | 2.25% | $1.61M | 0.00% | Jun 30, 2026 |
| Vanguard Extended Market Index Fund | 380,212 | 0.96% | $691.99K | 0.00% | Jun 30, 2026 |
| Fidelity Extended Market Index Fund | 172,649 | 0.44% | $372.92K | 0.00% | May 31, 2026 |
| iShares Micro-Cap ETF | 102,359 | 0.26% | $186.29K | 0.01% | Jun 30, 2026 |
| Ultra-Small Company Market Fund | 51,105 | 0.13% | $93.01K | 0.06% | Jun 30, 2026 |
| Fidelity Total Market Index Fund | 50,639 | 0.13% | $109.38K | 0.00% | May 31, 2026 |
| Fidelity Series Total Market Index Fund | 43,469 | 0.11% | $93.89K | 0.00% | May 31, 2026 |
| Fidelity Nasdaq Composite Index Fund | 23,191 | 0.06% | $50.09K | 0.00% | May 31, 2026 |
| Goldman Sachs Absolute Return Tracker Fund | 21,836 | 0.06% | $39.74K | 0.00% | Jun 30, 2026 |
| Vanguard Institutional Total Stock Market Index Fund | 18,716 | 0.05% | $34.06K | 0.00% | Jun 30, 2026 |
| Vanguard Balanced Index Fund | 11,848 | 0.03% | $21.56K | 0.00% | Jun 30, 2026 |
| 1290 VT Micro Cap Portfolio | 6,968 | 0.02% | $12.68K | 0.01% | Jun 30, 2026 |
| Avantis U.S. Small Cap Equity ETF | 5,403 | 0.01% | $11.67K | 0.00% | May 31, 2026 |
| Dimensional US Core Equity 1 ETF | 5,101 | 0.01% | $10.41K | 0.00% | Jul 31, 2026 |
| JNL/DFA U.S. Small Cap Fund | 3,288 | 0.01% | $5.98K | 0.00% | Jun 30, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Zhenya Lindgardt | Chief Executive Officer, Director | 837,848 | 2.12% | Sep 11, 2026 |
| Benjamin Jackson | General Counsel | 159,566 | 0.40% | Sep 11, 2026 |
| Dyaarl Lee Anderson Jr. | Chief Commercial Officer | 76,198 | 0.19% | Sep 11, 2026 |
| Tiffany Eul Davis Inglis | Chief Medical Officer | 91,589 | 0.23% | Sep 11, 2026 |
| Austin Aerts | Chief Financial Officer | 301,190 | 0.76% | Sep 2, 2026 |
| Scott Gleason | Chief Financial Officer | 117,924 | 0.30% | Sep 1, 2026 |
| John J. Boniface | Chief Scientific Officer | 145,842 | 0.37% | May 6, 2026 |
| Robert Gardner Harrison | Chief Information Officer | 76,712 | 0.19% | May 6, 2026 |
| Paul Kearney | Chief Data Officer | 163,961 | 0.42% | May 6, 2026 |
| Kim P. Kamdar | Director | 92,547 | 0.23% | Jul 14, 2026 |
| Mark Christopher Capone | Director | 42,404 | 0.11% | Jul 14, 2026 |
| Gregory C. Critchfield | Director | 1,477,718 | 3.75% | Jul 14, 2026 |
| Sandra AJ Lawrence | Director | 38,899 | 0.10% | Jul 14, 2026 |
| Joshua Phillips | Director | 81,691 | 0.21% | Jul 14, 2026 |
| Jane F. Barlow | Director | 45,139 | 0.11% | Jul 14, 2026 |
| Mansoor Raza Mirza | Director | 80,166 | 0.20% | Jul 14, 2026 |
| Jeffrey Thomas Elliott | Director | 30,534 | 0.08% | Jun 4, 2026 |
| Ryan Trimble | Director | 74,557 | 0.19% | Jun 30, 2025 |
| Marcus Dean Wilson | Director | 7,117 | 0.02% | Jun 6, 2025 |
| Bros. Advisors (GP) LLC Baker | 10% owner | – | – | Feb 14, 2025 |
| Bros. Advisors Lp Baker | 10% owner | – | – | Feb 14, 2025 |
| Felix Baker | 10% owner | 5,065,736 | 12.84% | Feb 14, 2025 |
| Julian Baker | 10% owner | – | – | Feb 14, 2025 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Dyaarl Lee Anderson Jr. Chief Commercial Officer | Sep 10, 2026 | Sale | −1,800 | $2.00 | $3.60K | 76,198 |
| Benjamin Jackson General Counsel | Sep 10, 2026 | Sale | −2,190 | $2.00 | $4.38K | 159,566 |
| Zhenya Lindgardt Chief Executive Officer, Director | Sep 10, 2026 | Sale | −7,022 | $2.00 | $14.04K | 837,848 |
| Tiffany Eul Davis Inglis Chief Medical Officer | Sep 10, 2026 | Sale | −486 | $2.00 | $972 | 91,589 |
| Zhenya Lindgardt Chief Executive Officer, Director | Sep 8, 2026 | Sale | −20,139 | $2.00 | $40.28K | 844,870 |
| Scott Gleason Chief Financial Officer | Aug 31, 2026 | Award | +117,924 | – | – | 117,924 |
| Kim P. Kamdar Director | Jul 10, 2026 | Award | +22,426 | – | – | 54,999 |
| Kim P. Kamdar Director | Jul 10, 2026 | Award | +3,421 | – | – | 58,420 |
| Mansoor Raza Mirza Director | Jul 10, 2026 | Award | +22,426 | – | – | 80,166 |
| Mansoor Raza Mirza Director | Jul 10, 2026 | Award | +1,771 | – | – | 81,937 |
| Jane F. Barlow Director | Jul 10, 2026 | Award | +22,426 | – | – | 45,139 |
| Jane F. Barlow Director | Jul 10, 2026 | Award | +1,949 | – | – | 47,088 |
| Joshua Phillips Director | Jul 10, 2026 | Award | +2,260 | – | – | 81,691 |
| Joshua Phillips Director | Jul 10, 2026 | Award | +22,426 | – | – | 79,431 |
| Sandra AJ Lawrence Director | Jul 10, 2026 | Award | +22,426 | – | – | 38,899 |
| Sandra AJ Lawrence Director | Jul 10, 2026 | Award | +2,276 | – | – | 41,175 |
| Mark Christopher Capone Director | Jul 10, 2026 | Award | +42,404 | – | – | 42,404 |
| Mark Christopher Capone Director | Jul 10, 2026 | Award | +1,975 | – | – | 44,379 |
| Gregory C. Critchfield Director | Jul 10, 2026 | Award | +1,594 | – | – | 846,886 |
| Gregory C. Critchfield Director | Jul 10, 2026 | Award | +22,426 | – | – | 845,292 |
| Benjamin Jackson General Counsel | Jun 11, 2026 | Sale | −2,179 | $2.01 | $4.38K | 161,756 |
| Zhenya Lindgardt Chief Executive Officer, Director | Jun 11, 2026 | Sale | −6,990 | $2.01 | $14.05K | 865,009 |
| Dyaarl Lee Anderson Jr. Chief Commercial Officer | Jun 11, 2026 | Sale | −4,739 | $2.01 | $9.53K | 77,998 |
| Austin Aerts Chief Financial Officer | Jun 11, 2026 | Sale | −2,037 | $2.01 | $4.09K | 301,190 |
| Tiffany Eul Davis Inglis Chief Medical Officer | Jun 11, 2026 | Sale | −362 | $2.01 | $728 | 92,075 |
| Austin Aerts Chief Financial Officer | Jun 9, 2026 | Sale | −5,440 | $2.08 | $11.32K | 303,227 |
| Zhenya Lindgardt Chief Executive Officer, Director | Jun 9, 2026 | Sale | −20,755 | $2.08 | $43.17K | 871,999 |
| Sandra AJ Lawrence Director | Jun 8, 2026 | Sale(10b5-1 plan) | −1,560 | $2.15 | $3.35K | 16,473 |
| Dyaarl Lee Anderson Jr. Chief Commercial Officer | May 29, 2026 | Award | +3,168 | $1.84 | $5.83K | 82,737 |
| Benjamin Jackson General Counsel | May 29, 2026 | Award | +5,000 | $1.84 | $9.20K | 163,935 |
| Zhenya Lindgardt Chief Executive Officer, Director | Mar 12, 2026 | Award | +154,440 | – | – | 892,754 |
| Austin Aerts Chief Financial Officer | Mar 12, 2026 | Award | +44,215 | – | – | 308,667 |
| Dyaarl Lee Anderson Jr. Chief Commercial Officer | Mar 12, 2026 | Award | +12,455 | – | – | 79,569 |
| Benjamin Jackson General Counsel | Mar 12, 2026 | Award | +44,215 | – | – | 158,935 |
| Tiffany Eul Davis Inglis Chief Medical Officer | Mar 12, 2026 | Award | +17,437 | – | – | 92,437 |
| Zhenya Lindgardt Chief Executive Officer, Director | Mar 11, 2026 | Sale | −2,973 | $2.04 | $6.06K | 738,314 |
| Benjamin Jackson General Counsel | Mar 11, 2026 | Sale | −1,027 | $2.04 | $2.10K | 114,720 |
| John J. Boniface Chief Scientific Officer | Mar 11, 2026 | Sale | −1,517 | $2.04 | $3.09K | 145,842 |
| Paul Kearney Chief Data Officer | Mar 11, 2026 | Sale | −1,396 | $2.04 | $2.85K | 163,961 |
| Robert Gardner Harrison Chief Information Officer | Mar 11, 2026 | Sale | −716 | $2.04 | $1.46K | 76,712 |
| Austin Aerts Chief Financial Officer | Mar 11, 2026 | Sale | −1,019 | $2.04 | $2.08K | 264,452 |
| Zhenya Lindgardt Chief Executive Officer, Director | Mar 10, 2026 | Sale | −22,639 | $1.90 | $43.01K | 741,287 |
| Austin Aerts Chief Financial Officer | Mar 10, 2026 | Sale | −6,069 | $1.90 | $11.53K | 265,471 |
| Austin Aerts Chief Financial Officer | Mar 9, 2026 | Sale | −674 | $1.96 | $1.32K | 271,540 |
| Paul Kearney Chief Data Officer | Mar 9, 2026 | Sale | −2,026 | $1.96 | $3.97K | 165,357 |
| Benjamin Jackson General Counsel | Mar 9, 2026 | Sale | −3,119 | $1.96 | $6.11K | 115,747 |
| John J. Boniface Chief Scientific Officer | Mar 9, 2026 | Sale | −3,038 | $1.96 | $5.95K | 147,359 |
| Robert Gardner Harrison Chief Information Officer | Mar 9, 2026 | Sale | −3,360 | $1.96 | $6.59K | 77,428 |
| Sandra AJ Lawrence Director | Mar 6, 2026 | Sale(10b5-1 plan) | −1,560 | $1.95 | $3.04K | 18,033 |
| Robert Gardner Harrison Chief Information Officer | Feb 24, 2026 | Sale(10b5-1 plan) | −2,000 | $2.34 | $4.68K | 80,788 |
| Kim P. Kamdar Director | Feb 4, 2026 | Other | +3,231 | – | – | 32,573 |
| Kim P. Kamdar Director | Feb 4, 2026 | Other | −30,920 | – | – | 0 |
| Robert Gardner Harrison Chief Information Officer | Jan 27, 2026 | Sale(10b5-1 plan) | −2,000 | $2.97 | $5.94K | 82,788 |
| Robert Gardner Harrison Chief Information Officer | Dec 30, 2025 | Sale(10b5-1 plan) | −2,000 | $3.00 | $6.00K | 84,788 |
| Austin Aerts Chief Financial Officer | Dec 10, 2025 | Sale | −873 | $3.31 | $2.89K | 272,214 |
| Zhenya Lindgardt Chief Executive Officer, Director | Dec 10, 2025 | Sale | −4,155 | $3.31 | $13.75K | 763,926 |
| Robert Gardner Harrison Chief Information Officer | Dec 10, 2025 | Sale | −616 | $3.31 | $2.04K | 86,788 |
| Paul Kearney Chief Data Officer | Dec 10, 2025 | Sale | −1,213 | $3.31 | $4.02K | 167,383 |
| John J. Boniface Chief Scientific Officer | Dec 10, 2025 | Sale | −1,332 | $3.31 | $4.41K | 150,397 |
| Benjamin Jackson General Counsel | Dec 10, 2025 | Sale | −892 | $3.31 | $2.95K | 118,866 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Tiffany Eul Davis Inglis Officer | Oct 13, 2026 | 8,024 | $16.29K | Oct 12, 2026 | Restricted Stock Unit Vesting |
| Tiffany Eul Davis Inglis Officer | Sep 11, 2026 | 486 | $972 | Sep 10, 2026 | Restricted Stock Unit Vesting |
| Dyaarl Lee Anderson Jr. Officer | Sep 11, 2026 | 1,800 | $3.60K | Sep 10, 2026 | Restricted Stock Unit Vesting |
| Austin Aerts Officer | Sep 11, 2026 | 1,509 | $3.02K | Sep 10, 2026 | Restricted Stock Unit Vesting |
| Zhenya Lindgardt Officer, Director | Sep 11, 2026 | 7,022 | $14.05K | Sep 10, 2026 | Restricted Stock Unit Vesting |
| Benjamin Jackson Officer | Sep 11, 2026 | 2,190 | $4.38K | Sep 10, 2026 | Restricted Stock Unit Vesting |
| Austin Aerts Officer | Sep 9, 2026 | 13,591 | $27.20K | Sep 8, 2026 | Restricted Stock Unit Vesting |
| Zhenya Lindgardt Officer, Director | Sep 9, 2026 | 20,139 | $40.29K | Sep 8, 2026 | Restricted Stock Unit Vesting |
| Tiffany Eul Davis Inglis Officer | Jun 15, 2026 | 362 | $726 | Jun 11, 2026 | Restricted Stock Unit Vesting |
| Dyaarl Lee Anderson Jr. Officer | Jun 15, 2026 | 4,739 | $9.50K | Jun 11, 2026 | Restricted Stock Unit Vesting |
| Austin Aerts Officer | Jun 15, 2026 | 2,037 | $4.09K | Jun 11, 2026 | Restricted Stock Unit Vesting |
| Zhenya Lindgardt Officer, Director | Jun 15, 2026 | 6,990 | $14.02K | Jun 11, 2026 | Restricted Stock Unit Vesting |
| Benjamin Jackson Officer | Jun 15, 2026 | 2,179 | $4.37K | Jun 11, 2026 | Restricted Stock Unit Vesting |
| Zhenya Lindgardt Officer, Director | Jun 10, 2026 | 20,755 | $43.20K | Jun 9, 2026 | Restricted Stock Unit Vesting |
| Austin Aerts Officer | Jun 10, 2026 | 5,440 | $11.32K | Jun 9, 2026 | Restricted Stock Unit Vesting |