Sera Prognostics

SERA • NASDAQ

Sera Prognostics is a medical - diagnostics & research company in the healthcare sector on NASDAQ, led by Zhenya Lindgardt, with a market cap of $135.5M. As of Q3 2025, 48% of shares are held by 61 institutional investors, with BAKER BROS. ADVISORS LP as the largest holder at 14.45%.

Interim Chief Executive OfficerZhenya Lindgardt

Market Cap$135.5M

Medical - Diagnostics & Research

Healthcare

Employees57.0

Websiteseraprognostics.com

Country

United States of America

Overview

Overview of institutional ownership in SERA as of Q3 2025 with a market cap of $116.5M

All Institutions

Institutions: 61
Value Held: $55.6M
Shares Held: 18.2M
Avg Position: $910.9K
Median Position: $83.5K

Hedge Funds

Hedge Funds: 8
Value Held: $31.5M
Shares Held: 10.3M
Avg Position: $3.9M
Median Position: $512.0K

Ownership Breakdown

Institutional (non-HF)

20.62%

$24.0M

Hedge Funds

27.08%

$31.5M

Retail & Other

52.29%

$60.9M

Based on market cap of $116.5M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in SERA as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
B BAKER BROS. ADVISORS LP Hedge Fund•Sector	Scott Lawrence Lessing President	$16.8M 0.16% of portfolio	14.45% 5.5M shares	Q3 2021 Held for 4y 2m	$10.8B
Whetstone Capital Advisors, LLC Hedge Fund•Long/Short	David Alan Atterbury President	$11.1M 3.08% of portfolio	9.54% 3.6M shares	Q2 2025 Held for 5 months	$361.1M
S Standard Life Aberdeen plc Institution	-	$7.0M 0.01% of portfolio	5.99% 2.3M shares	Q1 2025 Held for 8 months	$63.2B
Vivo Capital, LLC Venture Capital	Jack Bech Nielsen Managing Partner	$5.1M 0.41% of portfolio	4.34% 1.7M shares	Q3 2021 Held for 4y 2m	$1.2B
VANGUARD GROUP INC Institution	Salim Ramji CEO	$3.7M 0.00% of portfolio	3.20% 1.2M shares	Q3 2021 Held for 4y 2m	$6.69T
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	Kenneth Cordele Griffin CEO	$2.0M 0.00% of portfolio	1.72% 653.7K shares	Q2 2024 Held for 1y 5m	$122.08B
CAPTRUST FINANCIAL ADVISORS RIA/Wealth	James Fielding Miller CEO	$1.8M 0.00% of portfolio	1.58% 602.3K shares	Q3 2022 Held for 3y 2m	$48.9B
GEODE CAPITAL MANAGEMENT LLC ETF Provider	David Kenneth Lane CEO	$1.0M 0.00% of portfolio	0.87% 331.1K shares	Q3 2021 Held for 4y 2m	$1.57T
SANDERS MORRIS HARRIS INC. Long Only Manager	Anthony Paul Coniaris Chairman	$806.6K 0.11% of portfolio	0.69% 263.6K shares	Q3 2021 Held for 4y 2m	$750.1M
A AWM Investment Company, Inc. Hedge Fund•Event Driven	David Michael Greenhouse President	$634.6K 0.06% of portfolio	0.54% 207.4K shares	Q4 2023 Held for 1y 11m	$1.1B

Net Capital Flow

Institutional buying and selling activity for SERA in Q3 2025

Traded: −$1.4M
Buyers: 27
Sellers: 20
Total Bought: +$1.3M
Total Sold: −$2.7M
Avg Position: $782.6K

Biggest Buyers

Institution	Net Bought	Current Position
Balentine LLC RIA/Wealth	+$258.5K +84.5K shares	$258.5K 84.5K shares
VANGUARD GROUP INC Institution	+$165.3K +54.0K shares	$3.7M 1.2M shares
S Standard Life Aberdeen plc Institution	+$160.1K +52.3K shares	$7.0M 2.3M shares
B BlackRock, Inc. Institution	+$103.1K +33.7K shares	$547.7K 179.0K shares
TWO SIGMA INVESTMENTS LLC Hedge Fund•Multi-Strategy	+$97.1K +31.7K shares	$97.1K 31.7K shares
GEODE CAPITAL MANAGEMENT LLC ETF Provider	+$87.9K +28.7K shares	$1.0M 331.1K shares
B Birch Hill Investment Advisors LLC RIA/Wealth	+$83.5K +27.3K shares	$83.5K 27.3K shares
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	+$75.7K +24.7K shares	$2.0M 653.7K shares
UBS Group AG Institution	+$71.9K +23.5K shares	$75.0K 24.5K shares
Lido Advisors, LLC RIA/Wealth	+$67.8K +22.2K shares	$67.8K 22.2K shares

Biggest Sellers

Institution	Net Sold	Current Position
A AWM Investment Company, Inc. Hedge Fund•Event Driven	−$1.4M −473.5K shares	$634.6K 207.4K shares
PERKINS CAPITAL MANAGEMENT INC RIA/Wealth	−$362.9K −131.0K shares	Sold Off 0 shares
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC RIA/Wealth	−$246.9K −99.2K shares	Sold Off 0 shares
Y Y-Intercept Ltd Institution	−$187.5K −67.7K shares	Sold Off 0 shares
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	−$175.3K −57.3K shares	$389.5K 127.3K shares
ACADIAN ASSET MANAGEMENT LLC Long Only Manager	−$103.6K −37.4K shares	Sold Off 0 shares
T Tower Research Capital LLC Institution	−$28.9K −10.4K shares	Sold Off 0 shares
Q Qube Research & Technologies Ltd Institution	−$28.5K −9.3K shares	$73.7K 24.1K shares
Equitable Holdings, Inc. Institution	−$27.7K −10.0K shares	Sold Off 0 shares
D Dauntless Investment Group, LLC Institution	−$27.7K −10.0K shares	Sold Off 0 shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited SERA in Q3 2025

New Positions: 11
New Value: $568.5K
Exited Positions: 9
Exited Value: $988.4K

New Positions

Institution	Position Value
Balentine LLC RIA/Wealth	$258.5K 84.5K shares
TWO SIGMA INVESTMENTS LLC Hedge Fund•Multi-Strategy	$97.1K 31.7K shares
B Birch Hill Investment Advisors LLC RIA/Wealth	$83.5K 27.3K shares
Lido Advisors, LLC RIA/Wealth	$67.8K 22.2K shares
JustInvest LLC Long Only Manager	$38.4K 12.6K shares
Geneos Wealth Management Inc. RIA/Wealth	$13.8K 4.5K shares
C Cubist Systematic Strategies, LLC Institution	$7.1K 2.3K shares
O Optiver Holding B.V. Institution	$1.3K 412.0 shares
Fortitude Family Office, LLC Family Office	$921.0 301.0 shares
A Advisory Services Network, LLC RIA/Wealth	$58.0 19.0 shares

Exited Positions

Institution	Previous Position
PERKINS CAPITAL MANAGEMENT INC RIA/Wealth	$362.9K 131.0K shares
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC RIA/Wealth	$246.9K 99.2K shares
Y Y-Intercept Ltd Institution	$187.5K 67.7K shares
ACADIAN ASSET MANAGEMENT LLC Long Only Manager	$103.6K 37.4K shares
T Tower Research Capital LLC Institution	$28.9K 10.4K shares
Equitable Holdings, Inc. Institution	$27.7K 10.0K shares
D Dauntless Investment Group, LLC Institution	$27.7K 10.0K shares
RAYMOND JAMES FINANCIAL INC RIA/Wealth	$2.8K 1.0K shares
Rise Advisors, LLC RIA/Wealth	$476.0 172.0 shares

Options Activity

Institutions with the largest Call and Put options positions in SERA as of Q3 2025

Call Positions: 1
Call Value: -
Put Positions: 0
Put Value: -

Call Positions

Institution	Position Value
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	- - contracts

Put Positions

Institution	Position Value
No put positions found

Most Committed Institutions

Institutions with SERA as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
Whetstone Capital Advisors, LLC Hedge Fund•Long/Short	David Alan Atterbury President	3.08% $11.1M	9.54% 3.6M shares	Q2 2025 Held for 5 months	$361.1M
Vivo Capital, LLC Venture Capital	Jack Bech Nielsen Managing Partner	0.41% $5.1M	4.34% 1.7M shares	Q3 2021 Held for 4y 2m	$1.2B
B BAKER BROS. ADVISORS LP Hedge Fund•Sector	Scott Lawrence Lessing President	0.16% $16.8M	14.45% 5.5M shares	Q3 2021 Held for 4y 2m	$10.8B
SANDERS MORRIS HARRIS INC. Long Only Manager	Anthony Paul Coniaris Chairman	0.11% $806.6K	0.69% 263.6K shares	Q3 2021 Held for 4y 2m	$750.1M
A AWM Investment Company, Inc. Hedge Fund•Event Driven	David Michael Greenhouse President	0.06% $634.6K	0.54% 207.4K shares	Q4 2023 Held for 1y 11m	$1.1B
Twelve Points Wealth Management LLC RIA/Wealth	David Matthew Clayman CEO	0.03% $132.8K	0.11% 43.4K shares	Q2 2024 Held for 1y 5m	$399.1M
Requisite Capital Management, LLC RIA/Wealth	Douglas Geoffrey John Managing Partner	0.03% $170.3K	0.15% 55.6K shares	Q3 2022 Held for 3y 2m	$595.2M
GSA CAPITAL PARTNERS LLP Hedge Fund•Quant	David Khabie-Zeitoune CEO	0.02% $199.5K	0.17% 65.2K shares	Q1 2025 Held for 8 months	$1.1B
A Abel Hall, LLC RIA/Wealth	Leo Gregory Abel Managing Partner	0.01% $33.8K	0.03% 11.0K shares	Q2 2025 Held for 5 months	$246.5M
Riverview Capital Advisers, LLC RIA/Wealth	Paula J Pienkowska Managing Partner	0.01% $39.0K	0.03% 12.7K shares	Q2 2025 Held for 5 months	$333.3M

Hedge Fund Spotlight

Discover hedge funds investing in SERA

Whetstone Capital Advisors, LLC

Hedge Fund • Long/Short

Portfolio ManagerDavid Alan Atterbury

Portfolio Value: $361.1M
Positions: 56
Last Reported: Q3 2025

Sector Allocation

Position in Sera Prognostics

Market Value: $11.1M
Shares Held: 3.6M
Portfolio Weight: 3.08%
Owned Since: 2025-Q2

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