Sera Prognostics

SERA · NASDAQ

$2.03+$0.00 (+0.00%)TodayMarket closed · Oct 20, 4:00 PM ET

Prev close $2.03

Who owns SERA

Largest institutional holders, from their latest 13F filings

The 10 largest institutions hold 53.4% of SERA’s shares.

Baker Bros. Advisors LP14.0%
Whetstone Capital Advisors, LLC8.4%
abrdn Inc.7.0%
Chione, Ltd.6.1%
Next 6 largest institutions17.8%
All other shareholders46.6%

Top institutional holders of SERA
Holder	Shares	% of shares	Change, last filing	Filed
Baker Bros. Advisors LP	5.50M	14.04%	+0	Jun 30, 2026
Whetstone Capital Advisors, LLC	3.31M	8.44%	+0	Jun 30, 2026
abrdn Inc.	2.75M	7.03%	+202.75K	Jun 30, 2026
Chione, Ltd.	2.40M	6.12%	+625.00K	Feb 11, 2025
Anthem, Inc.	2.20M	5.62%	+0	Apr 13, 2026
Vivo Capital, LLC	1.65M	4.21%	+0	Jun 30, 2026
Vanguard Capital Management, LLC	1.30M	3.31%	+93.68K	Jun 30, 2026
Critchfield (Gregory C)	846.89K	2.16%	+24.02K	Jul 10, 2026
CAPTRUST Financial Advisors	535.75K	1.37%	−1.01K	Jun 30, 2026
Lindgardt (Zhenya)	432.96K	1.11%	−27.75K	Jun 11, 2026

Largest mutual fund holders

Top mutual fund holders of SERA
Holder	Shares	% of shares	Change, last filing	Filed
abrdn Healthcare Investors Fund (US)	1.30M	3.31%	+150.07K	Mar 31, 2026
abrdn Healthcare Opportunities Fund	1.25M	3.20%	+121.00K	Mar 31, 2026
Vanguard Total Stock Market Index Fund	887.02K	2.27%	+0	Jul 31, 2026
Vanguard Extended Market Index Fund	380.21K	0.97%	+0	Jul 31, 2026
Fidelity Extended Market Index Fund	162.23K	0.41%	−303	Jul 31, 2026

Insider trades

Form 4 filings by officers, directors and large holders

Over the last 6 months, insiders sold $170.18K (14 trades) of SERA on the open market, with no buys.

Latest SERA insider transactions
Insider	Date	Type	Shares	Price	Value
Inglis Tiffany Eul Davis	Oct 12, 2026	Sale	8.02K	$2.03	$16.29K
Inglis Tiffany Eul Davis	Sep 10, 2026	Sale	486	$2.00	$972
Anderson Dyaarl Lee Jr.	Sep 10, 2026	Sale	1.80K	$2.00	$3.60K
Lindgardt Zhenya	Sep 10, 2026	Sale	7.02K	$2.00	$14.04K
Jackson Benjamin	Sep 10, 2026	Sale	2.19K	$2.00	$4.38K
Lindgardt Zhenya	Sep 8, 2026	Sale	20.14K	$2.00	$40.28K
Gleason Scott	Aug 31, 2026	Award	169.62K	—	—
Gleason Scott	Aug 31, 2026	Award	117.92K	—	—
Phillips Joshua	Jul 10, 2026	Award	3.48K	—	—
Phillips Joshua	Jul 10, 2026	Award	34.49K	—	—

Short interest

Settled Sep 30, 2026

Shares short: 229.72K
Days to cover: 13.42
% of shares outstanding: 0.59%
Average daily volume: 17.12K
Change since last report: +7.4%

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