$ALDX

$0.64 -$0.01 (1.23%) Close

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

Ownership

13F as of Q2 2026 · 60.3M shares outstanding

Who owns ALDX?

By type of holder

Institutions 60.5% Insiders 17.6% Everyone else 22.0%

Concentration Top 10 holders own 39.0%

Knoll Capital Management, LLC 9.1% · BlackRock, Inc. 2.1%

Institutional ownership

60.5%

-1.4 pts vs last qtr

Institutional holders

106

-22 vs last qtr

Net shares bought

−871.7K

by institutions in Q2 2026

New / sold out

19 / 41

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Marshall Wace, LLP +1.4M
Qube Research & Technologies Ltd +1.0M

Biggest sellers in Q2 2026

BlackRock, Inc. −2.5M
State Street Corp −890.9K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Aldeyra Therapeutics Inc in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2013–FY2025

+6920.0%

+83.55% a year

Each share's claim on the business

−98.6%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $41.1M

over 8 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+ years44% 3–5 years4% 1–3 years37% Under 1 year15%

Quarterly turnover

22.2%

of institutional shares changed hands

Top 10 managers, median time held

1.5 years

Super Investors

Investment managers reporting ALDX on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
KC Knoll Capital Management, LLC	5.5M	9.08%	Unchanged	≤2021	5.4%
Shares held by quarter Peak holding5.5M (Q3'24) Change over 8 quarters0 Share of the company9.080% Knoll Capital Management, LLC's full portfolio →
B BlackRock, Inc.	1.3M	2.08%	−2.5M (−66.6%)	≤2021	0.0%
Shares held by quarter Peak holding3.9M (Q2'25) Change over 8 quarters−2.5M Share of the company2.080% BlackRock, Inc.'s full portfolio →

Knoll Capital Management, LLC

5.5M

% of company

9.08%

Change vs last qtr

Unchanged

Held since

≤2021

BlackRock, Inc.

1.3M

% of company

2.08%

Change vs last qtr

−2.5M (−66.6%)

Held since

≤2021

28 more super investors behind a free account

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

Institutional Funds

Mutual funds and ETFs reporting ALDX on Form N-PORT; together they hold 13.6% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$3.8M	1.8M	2.96%	0.00%	June 30, 2026
IR iShares Russell 2000 ETF iShares Trust	$2.32M	1.4M	2.28%	0.00%	March 31, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$3.8M

% of company

2.96%

% of the fund

0.00%

As of

June 30, 2026

iShares Russell 2000 ETF

iShares Trust

Position value

$2.32M

% of company

2.28%

% of the fund

0.00%

As of

March 31, 2026

23 more funds behind a free account

See every fund holding Aldeyra Therapeutics 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
BT Brady Todd C Insider	1.7M	2.85%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company2.850% Brady Todd C's insider activity →
MS Machatha Stephen Insider	222.2K	0.37%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.370% Machatha Stephen's insider activity →

Brady Todd C

Insider

1.7M

% of company

2.85%

Change vs last qtr

—

Held since

—

Machatha Stephen

Insider

222.2K

% of company

0.37%

Change vs last qtr

—

Held since

—

2 more holders behind a free account

See every insider and 5%+ holder of Aldeyra Therapeutics Inc.

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