$SERA

$2.05 +$0.01 (0.49%) Close

$SERA Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 50.5M shares outstanding

Who owns SERA?

By type of holder

Institutions 33.8% Insiders 10.1% Everyone else 56.1%

Concentration Top 10 holders own 67.6%

Baker Bros. Advisors LP 10.9% · Baker Bros. Advisors (GP) LLC 10.9%

Institutional ownership

33.8%

-5.7 pts vs last qtr

Institutional holders

-9 vs last qtr

Net shares bought

−2.9M

by institutions in Q2 2026

New / sold out

1 / 10

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Aberdeen Group plc +202.8K
Vanguard Capital Management LLC +93.7K

Biggest sellers in Q2 2026

PSP Research LLC SOLD OUT −2.4M
Sanders Morris Harris LLC SOLD OUT −315.0K

Who is planning to sell?

Notices of proposed sale, last 12 months

$821K

57 notices from 13 people

Shares covered

328.1K

0.65% of the company

Arranged in advance

20%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Lindgardt Zhenya Officer $291K
Paul Kearney Officer $222K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2022–FY2025

+54.0%

+15.49% a year

Each share's claim on the business

−35.1%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $22.5M

over 4 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years60% 1–3 years39% Under 1 year1%

Quarterly turnover

9.3%

of institutional shares changed hands

Top 10 managers, median time held

4.8 years

Super Investors

Investment managers reporting SERA on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
BB Baker Bros. Advisors LP 13D · 16.1%	5.5M	10.89%	Unchanged	2021	0.1%
Shares held by quarter Peak holding5.5M (Q1'25) Change over 8 quarters+63.8K Share of the company10.890% Disclosed stake13D · 16.1% Baker Bros. Advisors LP's full portfolio →
WC Whetstone Capital Advisors, LLC	3.3M	6.55%	Unchanged	2025	1.6%
Shares held by quarter Peak holding3.6M (Q2'25) Change over 8 quarters+3.3M Share of the company6.550% Whetstone Capital Advisors, LLC's full portfolio →

Baker Bros. Advisors LP

13D · 16.1%

5.5M

% of company

10.89%

Change vs last qtr

Unchanged

Held since

2021

Whetstone Capital Advisors, LLC

3.3M

% of company

6.55%

Change vs last qtr

Unchanged

Held since

2025

28 more super investors behind a free account

See every manager holding Sera Prognostics, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting SERA on Form N-PORT; together they hold 9.0% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
AH abrdn Healthcare Investors abrdn Healthcare Investors	$2.51M	1.4M	2.73%	0.18%	June 30, 2026
AH abrdn Healthcare Opportunities Fund abrdn Healthcare Opportunities Fund	$2.47M	1.4M	2.69%	0.30%	June 30, 2026

abrdn Healthcare Investors

Position value

$2.51M

% of company

2.73%

% of the fund

0.18%

As of

June 30, 2026

abrdn Healthcare Opportunities Fund

Position value

$2.47M

% of company

2.69%

% of the fund

0.30%

As of

June 30, 2026

21 more funds behind a free account

See every fund holding Sera Prognostics, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
BB Baker Bros. Advisors (GP) LLC 5%+ holder 13D · 16.1%	5.5M	10.89%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company10.890% Disclosed stake13D · 16.1% View the 13D/G filing →
FJ Felix J. Baker 5%+ holder 13D · 16.1%	5.5M	10.89%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company10.890% Disclosed stake13D · 16.1% View the 13D/G filing →

Baker Bros. Advisors (GP) LLC

5%+ holder13D · 16.1%

5.5M

% of company

10.89%

Change vs last qtr

—

Held since

—

Felix J. Baker

5%+ holder13D · 16.1%

5.5M

% of company

10.89%

Change vs last qtr

—

Held since

—

3 more holders behind a free account

See every insider and 5%+ holder of Sera Prognostics, Inc..

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