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

CUSIP: 01438T106

Q1 2026 13F Holders as of 31 Mar 2026

Security identity
Security type / class
Equity / Common Stock, par value $0.001 per share
Shares outstanding
59,794,743
Holder snapshot
Total 13F shares
37,234,054
Share change
-1,230,339
Total reported value
$62,921,272
Put/Call ratio
51%
Reported price per share
$1.69
Number of holders
123
Value change
-$20,501,323
Number of buys
67
Number of sells
64

Security key

01438T106

Report period

Q1 2026

Institutions

123

Top holders

10

ALDX full security history Ownership snapshot Full 13F holder table Previous quarter: Q4 2025 Aldeyra Therapeutics, Inc. SEC filings Aldeyra Therapeutics, Inc. company facts

Broader feeds

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

Ownership snapshot

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

Lead holder
Michael Alfieri
13D/G signal
—
Evidence rows
15
Latest as of
18 Mar 2026
3/4/5 13F Lead comparable stake: 0.01% Showing 1-6 of 15 holder rows.
Holder Evidence Ownership % Position 12M Net Δ As of
Michael Alfieri
3/4/5
Principal Financial Officer
3/4/5
0.01%
$10,650
7,500 shares
 +$20,350 18 Mar 2026
Knoll Capital Management, LLC
13F
Company
13F
9.2%
$28,363,172
5,475,516 shares
 — 31 Dec 2025
PERCEPTIVE ADVISORS LLC
3/4/5 13F
10%+ Owner · Company
3/4/5 13F
7%
from 13F
$27,829,793
5,875,851 shares
 — 03 Apr 2025
BlackRock, Inc.
13F
Company
13F
6.4%
$19,943,533
3,850,103 shares
 — 31 Dec 2025
VANGUARD GROUP INC
13F
Company
13F
6.2%
$19,159,173
3,698,682 shares
 — 31 Dec 2025
KINGDON CAPITAL MANAGEMENT, L.L.C.
13F
Company
13F
3.1%
$9,583,000
1,850,000 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
123
Shares
37,234,054
Rows available
123
Investor Option Weight % Change % Reported value * Price Shares Share Change Activity Report Period

* 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 failed the local validity check.

Compare Q1 2026 vs Q4 2025 Across Filers

Q4 2025 holders
135
Q1 2026 holders
123
Holder diff
-12
Investor Q4 2025 Shares Q1 2026 Shares Share Diff Share Chg % Q4 2025 value Q1 2026 value Value change Value Chg %

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

Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
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