Aldeyra Therapeutics, Inc. - Common Stock, $0.001 par value per share (ALDX)

Q: What does CUSIP 01438T106 represent in this 13F holders report?

CUSIP 01438T106 is the security identifier for ALDX - Aldeyra Therapeutics, Inc. - Common Stock, $0.001 par value per share used to aggregate holder disclosures.

Q: How many institutions held ALDX - Aldeyra Therapeutics, Inc. - Common Stock, $0.001 par value per share in Q1 2026?

127 institutional investors reported ALDX - Aldeyra Therapeutics, Inc. - Common Stock, $0.001 par value per share for Q1 2026. Use the holders table for investor-level position and value details.

CUSIP: 01438T106

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / Common Stock, $0.001 par value per share
Total 13F shares: 37,269,714
Total 13F value: $62,981,538
Share change: -1,196,576
Put/Call ratio: 51%
SEC-reported price per share: $1.69
Number of holders: 127
Value change: -$20,444,263
Number of buys: 70
Number of sells: 64
Shares outstanding: 60,596,036

Security key

01438T106

Report period

Q1 2026

Institutions

127

Top holders

ALDX full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2026 Aldeyra Therapeutics, Inc. SEC filings Aldeyra Therapeutics, Inc. company facts

Broader feeds

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

Reporting periods

Holder history for CUSIP 01438T106

Newer quarter: Q3 2026

Recent filing periods:

Q3 2026

Ownership snapshot

Top reported holders of ALDX - Aldeyra Therapeutics, Inc. - Common Stock, $0.001 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

PERCEPTIVE ADVISORS LLC

Disclosed value leader

Knoll Capital Management,...

Comparable rows

0/15

Latest evidence

31 Dec 2025

3/4/5 13F Highest disclosed value: $28,363,172 15 rows are not safely comparable across share classes. Showing 1-6 of 15 holder rows.

Quick read

Knoll Capital Management, LLC has the largest disclosed position value at $28.36M.

0 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 Knoll Capital Management, LLC's linked filing trail.

Disclosed position value Top 5

PERCEPTIVE ADVISORS LLC $27.83M

Knoll Capital Management, LLC $28.36M

BlackRock, Inc. $19.94M

VANGUARD GROUP INC $19.16M

KINGDON CAPITAL MANAGEMENT, L.L.C. $9.58M

Value bars compare disclosed positions; verify each figure against the linked filing evidence.

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

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
PERCEPTIVE ADVISORS LLC	3/4/5 13F 10%+ Owner · Company 3/4/5 13F	— denominator unverified	$27,829,793 5,875,851 shares	—	03 Apr 2025
Knoll Capital Management, LLC	13F Company 13F	— denominator unverified	$28,363,172 5,475,516 shares	—	31 Dec 2025
BlackRock, Inc.	13F Company 13F	— denominator unverified	$19,943,533 3,850,103 shares	—	31 Dec 2025
VANGUARD GROUP INC	13F Company 13F	— denominator unverified	$19,159,173 3,698,682 shares	—	31 Dec 2025
KINGDON CAPITAL MANAGEMENT, L.L.C.	13F Company 13F	— denominator unverified	$9,583,000 1,850,000 shares	—	31 Dec 2025
D. E. Shaw & Co., Inc.	13F Company 13F	— denominator unverified	$8,294,858 1,601,324 shares	—	31 Dec 2025

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 Q1 2026

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

Institutions

127

37,269,714

Rows available

127

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 Q1 2026 vs Q1 2026 Across Filers

Q1 2026 holders

127

Q1 2026 holders

127

Holder diff

Investor	Q1 2026 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q1 2026 value	Q1 2026 value	Value change	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend