Aldeyra Therapeutics

ALDX • NASDAQ

Aldeyra Therapeutics is a biotechnology company in the healthcare sector on NASDAQ, led by Todd C. Brady, M.D., Ph.D., with a market cap of $273.1M. As of Q3 2025, 65% of shares are held by 131 institutional investors, with Knoll Capital Management, LP as the largest holder at 9.12%.

Chief Executive OfficerTodd C. Brady, M.D., Ph.D.

Market Cap$273.1M

Biotechnology

Healthcare

Employees10.0

Websitealdeyra.com

Country

United States of America

Overview

Overview of institutional ownership in ALDX as of Q3 2025 with a market cap of $313.4M

All Institutions

Institutions: 131
Value Held: $204.8M
Shares Held: 39.2M
Avg Position: $1.6M
Median Position: $179.9K

Hedge Funds

Hedge Funds: 16
Value Held: $68.6M
Shares Held: 13.1M
Avg Position: $4.3M
Median Position: $1.1M

Ownership Breakdown

Institutional (non-HF)

43.46%

$136.2M

Hedge Funds

21.89%

$68.6M

Retail & Other

34.65%

$108.6M

Based on market cap of $313.4M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in ALDX as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
K Knoll Capital Management, LP Institution	-	$28.6M 15.32% of portfolio	9.12% 5.5M shares	Q1 2015 Held for 10y 8m	$186.6M
PERCEPTIVE ADVISORS LLC Hedge Fund•Long/Short	Joseph Eric Edelman CEO	$27.3M 0.79% of portfolio	8.70% 5.2M shares	Q1 2015 Held for 10y 8m	$3.5B
B BlackRock, Inc. Institution	-	$19.9M 0.00% of portfolio	6.34% 3.8M shares	Q1 2017 Held for 8y 8m	$5.67T
VANGUARD GROUP INC Institution	Salim Ramji CEO	$18.7M 0.00% of portfolio	5.98% 3.6M shares	Q2 2015 Held for 10y 5m	$6.69T
ARDSLEY ADVISORY PARTNERS Hedge Fund•Long/Short	Steven Nicholas Napoli CFO	$9.9M 1.55% of portfolio	3.16% 1.9M shares	Q3 2024 Held for 1y 2m	$641.4M
AQR CAPITAL MANAGEMENT LLC Hedge Fund•Multi-Strategy	David Gary Kabiller Founder	$7.9M 0.01% of portfolio	2.51% 1.5M shares	Q2 2023 Held for 2y 5m	$156.17B
D D. E. Shaw & Co., Inc. Institution	-	$7.2M 0.01% of portfolio	2.30% 1.4M shares	Q1 2021 Held for 4y 8m	$115.81B
K KINGDON CAPITAL MANAGEMENT, L.L.C. Hedge Fund•Long/Short	Mark Elliot Kingdon CEO	$7.0M 1.09% of portfolio	2.22% 1.3M shares	Q1 2025 Held for 8 months	$638.2M
GEODE CAPITAL MANAGEMENT LLC ETF Provider	David Kenneth Lane CEO	$6.1M 0.00% of portfolio	1.96% 1.2M shares	Q3 2014 Held for 11y 2m	$1.57T
KENNEDY CAPITAL MANAGEMENT, INC. Long Only Manager	Donald M Cobin CEO	$5.8M 0.13% of portfolio	1.85% 1.1M shares	Q4 2023 Held for 1y 11m	$4.5B

Net Capital Flow

Institutional buying and selling activity for ALDX in Q3 2025

Traded: +$27.3M
Buyers: 83
Sellers: 39
Total Bought: +$34.7M
Total Sold: −$7.5M
Avg Position: $1.4M

Biggest Buyers

Institution	Net Bought	Current Position
PERCEPTIVE ADVISORS LLC Hedge Fund•Long/Short	+$6.1M +1.2M shares	$27.3M 5.2M shares
D D. E. Shaw & Co., Inc. Institution	+$4.7M +892.2K shares	$7.2M 1.4M shares
ACADIAN ASSET MANAGEMENT LLC Long Only Manager	+$3.4M +643.4K shares	$4.4M 835.8K shares
KENNEDY CAPITAL MANAGEMENT, INC. Long Only Manager	+$2.2M +425.2K shares	$5.8M 1.1M shares
BANK OF AMERICA CORP /DE/ Institution	+$1.7M +333.6K shares	$2.0M 390.1K shares
JACOBS LEVY EQUITY MANAGEMENT, INC Hedge Fund•Quant	+$1.6M +313.4K shares	$4.9M 947.6K shares
MORGAN STANLEY RIA/Wealth	+$1.6M +308.3K shares	$5.7M 1.1M shares
TWO SIGMA INVESTMENTS LLC Hedge Fund•Multi-Strategy	+$1.1M +217.3K shares	$1.4M 273.1K shares
WELLINGTON MANAGEMENT CO LLP Long Only Manager	+$990.9K +189.8K shares	$990.9K 189.8K shares
Marshall Wace LLP Institution	+$836.3K +160.2K shares	$836.3K 160.2K shares

Biggest Sellers

Institution	Net Sold	Current Position
6 683 Capital Management, LLC Hedge Fund•Long/Short	−$1.4M −260.0K shares	$4.3M 820.0K shares
P PFG Investments, LLC Institution	−$998.6K −191.3K shares	$344.5K 66.0K shares
A ADAR1 Capital Management, LLC Hedge Fund•Long/Short	−$957.2K −249.9K shares	Sold Off 0 shares
ARDSLEY ADVISORY PARTNERS Hedge Fund•Long/Short	−$783.0K −150.0K shares	$9.9M 1.9M shares
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	−$596.0K −155.6K shares	Sold Off 0 shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	−$383.1K −73.4K shares	$826.8K 158.4K shares
DIMENSIONAL FUND ADVISORS LP Long Only Manager	−$367.2K −70.3K shares	$3.4M 648.4K shares
R ROYAL BANK OF CANADA Institution	−$343.6K −65.8K shares	$283.6K 54.3K shares
PANAGORA ASSET MANAGEMENT INC Hedge Fund•Quant	−$276.0K −72.1K shares	Sold Off 0 shares
B BlackRock, Inc. Institution	−$246.3K −47.2K shares	$19.9M 3.8M shares

Entry and Exit Activity

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

New Positions: 12
New Value: $663.9K
Exited Positions: 15
Exited Value: $2.5M

New Positions

Institution	Position Value
Quantinno Capital Management LP Hedge Fund•Market Neutral	$267.9K 51.3K shares
Q Quadrature Capital Ltd Institution	$100.5K 19.3K shares
Buckingham Strategic Partners RIA/Wealth	$75.2K 14.6K shares
MERCER GLOBAL ADVISORS INC /ADV RIA/Wealth	$75.1K 14.4K shares
I Inscription Capital, LLC RIA/Wealth	$65.9K 12.6K shares
Krilogy Financial LLC RIA/Wealth	$51.3K 10.4K shares
New Millennium Group LLC RIA/Wealth	$12.8K 2.5K shares
O Optiver Holding B.V. Institution	$5.1K 980.0 shares
Point72 Europe LLP Digital Asset Manager	$4.8K 915.0 shares
P Pineridge Advisors LLC Institution	$3.1K 600.0 shares

Exited Positions

Institution	Previous Position
A ADAR1 Capital Management, LLC Hedge Fund•Long/Short	$957.2K 249.9K shares
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	$596.0K 155.6K shares
PANAGORA ASSET MANAGEMENT INC Hedge Fund•Quant	$276.0K 72.1K shares
Kennondale Capital Management LLC RIA/Wealth	$217.3K 56.7K shares
Ballast, Inc. RIA/Wealth	$121.1K 31.6K shares
LOS ANGELES CAPITAL MANAGEMENT & EQUITY RESEARCH INC Long Only Manager	$62.5K 16.3K shares
C Corton Capital Inc. Institution	$57.2K 14.9K shares
Caption Management, LLC Hedge Fund•Long/Short	$48.5K 12.7K shares
P ProShare Advisors LLC Institution	$42.6K 11.1K shares
T TWO SIGMA SECURITIES, LLC Institution	$42.1K 11.0K shares

Options Activity

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

Call Positions: 6
Call Value: $1.8M
Put Positions: 3
Put Value: $191.6K

Call Positions

Institution	Position Value
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$927.6K 1.8K contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$422.8K 810.0 contracts
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	$264.1K 506.0 contracts
J JANE STREET GROUP, LLC Institution	$178.5K 342.0 contracts
W WOLVERINE TRADING, LLC Institution	- - contracts
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	- - contracts

Put Positions

Institution	Position Value
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	$110.7K 212.0 contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$80.9K 155.0 contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	- - contracts

Most Committed Institutions

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

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
K Knoll Capital Management, LP Institution	-	15.32% $28.6M	9.12% 5.5M shares	Q1 2015 Held for 10y 8m	$186.6M
ARDSLEY ADVISORY PARTNERS Hedge Fund•Long/Short	Steven Nicholas Napoli CFO	1.55% $9.9M	3.16% 1.9M shares	Q3 2024 Held for 1y 2m	$641.4M
K KINGDON CAPITAL MANAGEMENT, L.L.C. Hedge Fund•Long/Short	Mark Elliot Kingdon CEO	1.09% $7.0M	2.22% 1.3M shares	Q1 2025 Held for 8 months	$638.2M
PERCEPTIVE ADVISORS LLC Hedge Fund•Long/Short	Joseph Eric Edelman CEO	0.79% $27.3M	8.70% 5.2M shares	Q1 2015 Held for 10y 8m	$3.5B
6 683 Capital Management, LLC Hedge Fund•Long/Short	Ari Jonathan Zweiman Managing Partner	0.40% $4.3M	1.37% 820.0K shares	Q4 2024 Held for 11 months	$1.1B
P Palo Alto Investors, LLC Hedge Fund•Long/Short	Angela Elizabeth Nguyen-Dinh CCO	0.22% $1.2M	0.38% 225.5K shares	Q2 2019 Held for 6y 5m	$540.4M
KENNEDY CAPITAL MANAGEMENT, INC. Long Only Manager	Donald M Cobin CEO	0.13% $5.8M	1.85% 1.1M shares	Q4 2023 Held for 1y 11m	$4.5B
WOODSTOCK CORP RIA/Wealth	William Henry Darling CEO	0.12% $1.4M	0.44% 266.8K shares	Q3 2017 Held for 8y 2m	$1.2B
Providence Wealth Advisors, LLC RIA/Wealth	Paul Warren Cochran Managing Partner	0.08% $128.5K	0.04% 25.0K shares	Q4 2023 Held for 1y 11m	$158.5M
J Joseph P. Lucia & Associates, LLC RIA/Wealth	Joseph Paul Lucia Managing Partner	0.06% $164.9K	0.05% 31.6K shares	Q4 2022 Held for 2y 11m	$264.0M

Hedge Fund Spotlight

Discover hedge funds investing in ALDX

ExodusPoint Capital Management, LP

Hedge Fund • Multi-Strategy

Portfolio ManagerMichael Robert Gelband

Portfolio Value: $7.1B
Positions: 1,351
Last Reported: Q3 2025

Sector Allocation

Position in Aldeyra Therapeutics

Market Value: $78.0K
Shares Held: 15.0K
Portfolio Weight: 0.00%
Owned Since: 2025-Q3

Top Holding	Sector	Market Value	Weight
1 Apple AAPL	Consumer Electronics Technology	$306.1M	4.29%
2 Ameren AEE	Regulated Electric Utilities	$103.0M	1.44%
3 Nvidia NVDA	Semiconductors Technology	$79.9M	1.12%