SERA PROGNOSTICS, INC. - Class A Common Stock $0.0001 par value per share (SERA)

Q: What does CUSIP 81749D107 represent in this 13F holders report?

CUSIP 81749D107 is the security identifier for SERA - SERA PROGNOSTICS, INC. - Class A Common Stock $0.0001 par value per share used to aggregate holder disclosures.

Q: How many institutions held SERA - SERA PROGNOSTICS, INC. - Class A Common Stock $0.0001 par value per share in Q2 2026?

46 institutional investors reported SERA - SERA PROGNOSTICS, INC. - Class A Common Stock $0.0001 par value per share for Q2 2026. Use the holders table for investor-level position and value details.

CUSIP: 81749D107

Q2 2026 13F Holders as of 30 Jun 2026

Security type / class: Equity / Class A Common Stock $0.0001 par value per share
Total 13F shares: 17,056,654
Total 13F value: $31,045,002
Share change: -2,887,131
SEC-reported price per share: $1.82
Number of holders: 46
Value change: -$5,869,162
Number of buys: 11
Number of sells: 21
Shares outstanding: 38,190,361

Security key

81749D107

Report period

Q2 2026

Institutions

Top holders

SERA full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2026 Previous quarter: Q4 2025 SERA PROGNOSTICS, INC. SEC filings SERA PROGNOSTICS, INC. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 81749D107

Newer quarter: Q3 2026 Previous quarter: Q4 2025

Recent filing periods:

Q3 2026 Q4 2025

Ownership snapshot

Top reported holders of SERA - SERA PROGNOSTICS, INC. - Class A Common Stock $0.0001 par value per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

BAKER BROS. ADVISORS LP

Disclosed value leader

BAKER BROS. ADVISORS LP

Comparable rows

5/15

Latest evidence

30 Jun 2026

13D/G 3/4/5 13F Lead comparable stake: 16% 10 rows are not safely comparable across share classes. 13D/G row: BAKER BROS. ADVISORS LP Showing 1-6 of 15 holder rows.

Quick read

BAKER BROS. ADVISORS LP leads the comparable SEC ownership view at 16%.

5 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens BAKER BROS. ADVISORS LP's linked filing trail.

Comparable ownership Top 5

BAKER BROS. ADVISORS LP 16%

Whetstone Capital Advisors, LLC 8.6%

Chione Ltd 7.6%

Aberdeen Group plc 7.2%

Vivo Capital IX, LLC 4.5%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
BAKER BROS. ADVISORS LP	13D/G 3/4/5 13F 10%+ Owner · Company 13D/G 3/4/5 13F	16% Reported 13D/G · 12 Feb 2025	$18,418,870 5,498,170 shares	$0	12 Feb 2025
Whetstone Capital Advisors, LLC	13D/G 13F Company 13D/G 13F	8.6% Reported 13D/G · 31 Mar 2026	$7,341,294 3,306,889 shares	-$339,269	31 Mar 2026
Chione Ltd	13D/G 13D/G	7.6% Reported 13D/G · 11 Feb 2025	$8,727,926 2,605,351 shares	$0	11 Feb 2025
Aberdeen Group plc	13D/G 13F Company 13D/G 13F	7.2% Reported 13D/G · 30 Jun 2026	$5,507,050 2,753,525 shares	+$1,052,316	30 Jun 2026
Vivo Capital IX, LLC	13D/G 13D/G	4.5% Reported 13D/G · 31 Mar 2025	$5,528,974 1,650,440 shares	$0	31 Mar 2025
Blue Ox Healthcare Partners, LLC	3/4/5 10%+ Owner 3/4/5	— denominator unverified	$1,339,791 256,665 shares	—	18 Jul 2022

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q2 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

17,056,654

Rows available

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q2 2026 vs Q4 2025 Across Filers

Q4 2025 holders

Q2 2026 holders

Holder diff

-10

Investor	Q4 2025 Shares	Q2 2026 Shares	Share Diff	Share Chg %	Q4 2025 value	Q2 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend