Sera (SERA)
Develops blood tests and predictive analytics for earlier assessment of spontaneous preterm-birth risk.
$2.13
After hours−0.01 (−0.47%)
At close$2.14(+0.94%)
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13F · 13D/G · Form 4
| Institutions | 43.24% | 17.06M shares | |
|---|---|---|---|
| 46 holders · as of Jun 30, 2026 | |||
| Insiders | 8.05% | 3.17M shares | |
| 17 holders · as of Sep 11, 2026 | |||
| Strategic holders | 6.98% | 2.75M shares | |
| 1 holder · as of Jul 15, 2026 | |||
| Other | 41.73% | 16.47M shares | |
| remainder | |||
39.45M company shares as of Sep 22, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
This company has 2 share classes; every stake here is a share of the whole company.
13F, as of Jun 30, 2026
46 holders · 17.06M shares · 2 new positions · 13 increased · 12 reduced · 12 closed
| Holder | Shares | % of company | Chg q/q | Filed |
|---|---|---|---|---|
| Baker Bros. Advisors LP | 5.50M | 13.94% | 0 | Aug 14, 2026 |
| Whetstone Capital Advisors, LLC | 3.31M | 8.38% | 0 | Aug 14, 2026 |
| Abrdn PLC | 2.75M | 6.98% | +202.8K | Jul 31, 2026 |
| Vivo Capital, LLC | 1.65M | 4.18% | 0 | Aug 14, 2026 |
| Vanguard Capital Management LLC | 1.30M | 3.29% | +93.7K | Aug 13, 2026 |
| Captrust Financial Advisors | 535.8K | 1.36% | −1.0K | Aug 13, 2026 |
| Geode Capital Management, LLC | 349.0K | 0.88% | −14.7K | Aug 12, 2026 |
| BlackRock, Inc. | 221.4K | 0.56% | +25.3K | Aug 7, 2026 |
13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Baker Bros. Advisors (GP) LLCincl. Baker Bros. Advisors LP, Felix J. Baker +1 more | 16.10% | 5.50M | 13D | Feb 14, 2025 |
| Whetstone Capital Advisors, LLC | 8.60% | 3.31M | 13G | May 1, 2026 |
| Chione Ltd.incl. Anastasis Nikolaou, Andreas Hadjimichael +2 more | 7.60% | 2.61M | 13D | Feb 14, 2025 |
| Aberdeen Group plc | 7.21% | 2.75M | 13G | Jul 15, 2026 |
Form 4
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Sep 10, 2026 | Benjamin Jacksonofficer: General Counsel | Sale | 2,190 | $2.00 | 159,566 |
| Sep 10, 2026 | Tiffany Eul Davis Inglisofficer: Chief Medical Officer | Sale | 486 | $2.00 | 91,589 |
| Sep 10, 2026 | Zhenya Lindgardtdirector, officer: Chief Executive Officer | Sale | 7,022 | $2.00 | 837,848 |
| Sep 10, 2026 | Dyaarl Lee Jr. Andersonofficer: Chief Commercial Officer | Sale | 1,800 | $2.00 | 76,198 |
| Sep 8, 2026 | Zhenya Lindgardtdirector, officer: Chief Executive Officer | Sale | 20,139 | $2.00 | 844,870 |
| Jun 11, 2026 | Benjamin Jacksonofficer: General Counsel | Sale | 2,179 | $2.01 | 161,756 |
| Jun 11, 2026 | Tiffany Eul Davis Inglisofficer: Chief Medical Officer | Sale | 362 | $2.01 | 92,075 |
| Jun 11, 2026 | Zhenya Lindgardtdirector, officer: Chief Executive Officer | Sale | 6,990 | $2.01 | 865,009 |
| Jun 11, 2026 | Austin Aertsofficer: Chief Financial Officer | Sale | 2,037 | $2.01 | 301,190 |
| Jun 11, 2026 | Dyaarl Lee Jr. Andersonofficer: Chief Commercial Officer | Sale | 4,739 | $2.01 | 77,998 |
House and Senate disclosures
Not reported.