Aldeyra Therapeutics ALDX Institutional Ownership

NASDAQ ALDX

$1.23 -0.09 (-6.82%)

At close: Sep 30, 2026 · 4:00 PM EDT

Institutions by Trading Activity

107 Institutions

Increased 52 48.6%

Unchanged 14 13.1%

Reduced 41 38.3%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

60.54%

▼-1.32 pp QoQ

Shares Held by Institutions

36.52Mn

of 60.32Mn outstanding

▲+4.39% QoQ

Shares Outstanding

60.32Mn

23.80Mn held outside 13F filers

Institutional Investors

107

filed 13F for Jun 2026

▼-20 vs prior quarter

Net Shares Added (QoQ)

+1.54Mn

accumulated since last quarter

Value of Holdings

$44.92Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Aldeyra Therapeutics, Inc. (NASDAQ:ALDX) has 107 institutional investors that have filed 13F reports for the period ending June 2026.

They owned 60.5% of outstanding stock in June 2026, down from 61.9% the prior quarter.
Their total shares held in ALDX increased 4.39% from the prior quarter, while the number of investors in Aldeyra Therapeutics decreased 12.3% year over year.
Of these 107 holders, 52 added to their stakes in Aldeyra Therapeutics, 41 trimmed positions, and 14 made no changes.
Combined, these investors held 36.52Mn shares in ALDX for June 2026, up by 1.54Mn shares quarter on quarter, and up 3.0Mn shares year over year.
Knoll Capital Management, LLC is the top holder of Aldeyra Therapeutics as of June 30, 2026, with 5.48Mn shares representing 9.08% of outstanding stock.
Leading buyers of Aldeyra Therapeutics shares for the quarter ending June 2026 were MARSHALL WACE, LLP (1.38Mn), Qube Research & Technologies Ltd (1.04Mn), AQR CAPITAL MANAGEMENT LLC (921.68K), D. E. Shaw & Co., Inc. (536.35K), KINGDON CAPITAL MANAGEMENT, L.L.C. (500.0K).
Top sellers of ALDX stock for the quarter ending June 2026 included BlackRock, Inc. (2.51Mn), State Street Corp (890.94K), GEODE CAPITAL MANAGEMENT, LLC (655.62K), MILLENNIUM MANAGEMENT LLC (634.89K), Northern Trust Corp (265.92K).
Per Business Quant data, the top 10 holders of Aldeyra Therapeutics for the quarter ending June 2026 are Knoll Capital Management, LLC (5.48Mn), AQR CAPITAL MANAGEMENT LLC (3.75Mn), KINGDON CAPITAL MANAGEMENT, L.L.C. (2.65Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.36Mn), D. E. Shaw & Co., Inc. (1.94Mn), MARSHALL WACE, LLP (1.51Mn), 683 Capital Management, LLC (1.45Mn), JANE STREET GROUP, LLC (1.38Mn), BlackRock, Inc. (1.26Mn), Qube Research & Technologies Ltd (1.13Mn).

Form 13F Holdings

107 Institutional Holders

Report period 30 Jun, 2026

Total shares held 36.52Mn

Of outstanding 60.54%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	Knoll Capital Management, LLC	0001325083	5,475,516	9.08%	0	0.00%	$11.66Mn
2	AQR CAPITAL MANAGEMENT LLC	0001167557	3,751,558	6.22%	▲921,683	+32.57%	$7.99Mn
3	KINGDON CAPITAL MANAGEMENT, L.L.C.	0001000097	2,652,315	4.40%	▲500,000	+23.23%	$5.65Mn
4	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	2,361,796	3.92%	▼1,946	-0.08%	$5.03Mn
5	D. E. Shaw & Co., Inc.	0001009207	1,940,338	3.22%	▲536,348	+38.20%	$4.13Mn
6	MARSHALL WACE, LLP	0001318757	1,506,974	2.50%	▲1,377,281	+1,061.95%	$3.21Mn
7	683 Capital Management, LLC	0001404574	1,450,000	2.40%	▼50,000	-3.33%	$3.09Mn
8	JANE STREET GROUP, LLC	0001595888	1,375,115	2.28%	▲406,224	+41.93%	$2.93Mn
9	BlackRock, Inc.	0002012383	1,257,243	2.08%	▼2,506,644	-66.60%	$2.68Mn
10	Qube Research & Technologies Ltd	0001729829	1,128,803	1.87%	▲1,041,725	+1,196.31%	$2.40Mn
11	ACADIAN ASSET MANAGEMENT LLC	0000916542	1,063,793	1.76%	▲205,505	+23.94%	$2.26K
12	ARDSLEY ADVISORY PARTNERS LP	0000900529	975,000	1.62%	▲25,000	+2.63%	$2.08Mn
13	RENAISSANCE TECHNOLOGIES LLC	0001037389	882,000	1.46%	▲18,813	+2.18%	$1.88Mn
14	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	794,863	1.32%	▼12,915	-1.60%	$1.69Mn
15	Goldman Sachs Group Inc	0000886982	725,444	1.20%	▲182,298	+33.56%	$1.55Mn
16	JACOBS LEVY EQUITY MANAGEMENT, INC	0000884414	646,840	1.07%	▼149,976	-18.82%	$1.38Mn
17	Morgan Stanley	0000895421	608,321	1.01%	▲89,679	+17.29%	$1.30Mn
18	GEODE CAPITAL MANAGEMENT, LLC	0001214717	596,029	0.99%	▼655,623	-52.38%	$1.27Mn
19	DIMENSIONAL FUND ADVISORS LP	0000354204	529,083	0.88%	▼95,087	-15.23%	$1.13Mn
20	GSA CAPITAL PARTNERS LLP	0001362033	472,564	0.78%	▲225,370	+91.17%	$1.01K

Showing 1 to 20 of 107 holders