ALDX · Aldeyra Therapeutics, Inc.

$1.49 -0.06 (-3.57%) At close · Aug 28

Market Cap

$89.58M

60.33M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Quarter:

Holders: 108

Total Value: $79,239,937

Total Shares: 37,201,878

Showing 1–100 of 114 holdings by value · page 1 of 2

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 108 13F filers · Δ vs Mar 31, 2026

Top Holder

14.7%

+0.4 pts

Top 5

43.5%

+0.2 pts

Top 10

62.0%

+1.6 pts

HHI

559

Broadly held+18

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: -20

Institutional value: +22.4%

Shares held: -2.9%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Large MARSHALL WACE, LLP	+1,377,281	1,506,974
Mega Qube Research & Technologies Ltd	+1,041,725	1,128,803
Mega AQR CAPITAL MANAGEMENT LLC	+921,683	3,751,558
Mega D. E. Shaw & Co., Inc.	+536,348	1,940,338
Small KINGDON CAPITAL MANAGEMENT, L.L.C.	+500,000	2,652,315

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mega BlackRock, Inc.	−2,506,644	1,257,243
Mega STATE STREET CORP	−890,936	233,774
Mega GEODE CAPITAL MANAGEMENT, LLC	−655,623	596,029
Mega MILLENNIUM MANAGEMENT LLC	−634,893	360,350
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP	−380,244	242,098

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	421,178	$897,109
Mid CANTOR FITZGERALD, L. P.	200,000	$426,000
Large Point72 Asset Management, L.P.	154,408	$328,889
Large Connor, Clark & Lunn Investment Management Ltd.	154,292	$328,641
Large Man Group plc	152,713	$325,278

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Small Propel Bio Management, LLC	730,606	$1,234,724
Large HRT FINANCIAL LP	286,444	$484,090
Large ExodusPoint Capital Management, LP	167,604	$283,250
Mega WELLINGTON MANAGEMENT GROUP LLP	148,962	$251,744
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC	139,029	$234,959

Filter: New 19 Increased 31 Reduced 44 Sold out 39 Unchanged 14

Showing 100 of 114

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

Knoll Capital Management, LLC

$11,662,849

14.72%

5,475,516

AQR CAPITAL MANAGEMENT LLC

$7,990,816

10.08%

3,751,558

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Prism Planning Partners LLC	356	$758	0.0%	Other
Arax Advisory Partners	8,675	$18,477	0.2%	Other
HALBERT HARGROVE GLOBAL ADVISORS, LLC	5,300	$11,289	0.1%	Other
Stokes Family Office, LLC	5,206	$11,088	0.1%	Other
Held directly	3,732,021	$7,949,204	99.5%	Defined

KINGDON CAPITAL MANAGEMENT, L.L.C.

$5,649,430

7.13%

2,652,315

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Manager 1 joint	2,652,315	$5,649,430	100.0%	Defined

VANGUARD CAPITAL MANAGEMENT LLC

$5,030,625

6.35%

2,361,796

D. E. Shaw & Co., Inc.

$4,132,919

5.22%

1,940,338

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
D. E. SHAW & CO, L.P.	1,940,338	$4,132,919	100.0%	Defined

MARSHALL WACE, LLP

$3,209,853

4.05%

1,506,974

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	1,506,974	$3,209,853	100.0%	Other

683 Capital Management, LLC

$3,088,500

3.90%

1,450,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
683 Capital Partners, LP	1,450,000	$3,088,500	100.0%	Defined

JANE STREET GROUP, LLC

$2,928,994

3.70%

1,375,115

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	862,006	$1,836,072	62.7%	Defined
Jane Street Global Trading, LLC	513,109	$1,092,922	37.3%	Defined

BlackRock, Inc.

$2,677,925

3.38%

1,257,243

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BLACKROCK FINANCIAL MANAGEMENT INC/DE	122,246	$260,383	9.7%	Sole
BlackRock Investment Management, LLC	12,997	$27,683	1.0%	Sole
BlackRock Fund Advisors	281,108	$598,760	22.4%	Sole
BlackRock Institutional Trust Company, N.A.	840,673	$1,790,633	66.9%	Sole
Aperio Group, LLC	219	$466	0.0%	Sole

Qube Research & Technologies Ltd

$2,404,350

3.03%

1,128,803

ACADIAN ASSET MANAGEMENT LLC

$2,265,879

2.86%

1,063,793

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	1,063,793	$2,265,879	100.0%	Defined

ARDSLEY ADVISORY PARTNERS LP

$2,076,750

2.62%

975,000

RENAISSANCE TECHNOLOGIES LLC

$1,878,660

2.37%

882,000

VANGUARD PORTFOLIO MANAGEMENT LLC

$1,693,058

2.14%

794,863

GOLDMAN SACHS GROUP INC

$1,545,195

1.95%

725,444

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	688,062	$1,465,572	94.8%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	37,382	$79,623	5.2%	Defined

JACOBS LEVY EQUITY MANAGEMENT, INC

$1,377,769

1.74%

646,840

MORGAN STANLEY

$1,295,721

1.64%

608,321

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	5,117	$10,899	0.8%	Defined
MORGAN STANLEY & CO. LLC	1,217	$2,592	0.2%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	79,262	$168,828	13.0%	Defined
MORGAN STANLEY SMITH BARNEY LLC	262,292	$558,681	43.1%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	260,433	$554,721	42.8%	Defined

GEODE CAPITAL MANAGEMENT, LLC

$1,269,540

1.60%

596,029

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	104,907	$223,451	17.6%	Defined
Held directly	491,122	$1,046,089	82.4%	Defined

DIMENSIONAL FUND ADVISORS LP

$1,126,945

1.42%

529,083

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Fund Advisors Ltd.	3,537	$7,533	0.7%	Defined
Dimensional Ireland Ltd	26,185	$55,774	4.9%	Defined
Held directly	499,361	$1,063,638	94.4%	Sole

GSA CAPITAL PARTNERS LLP

$1,006,561

1.27%

472,564

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

$897,109

1.13%

421,178

CITADEL ADVISORS LLC

$807,576

1.02%

379,144

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	358,596	$763,809	94.6%	Defined
Held directly	20,548	$43,767	5.4%	Defined

MILLENNIUM MANAGEMENT LLC

$767,545

0.97%

360,350

UBS Group AG

$643,131

0.81%

301,940

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	232,858	$495,987	77.1%	Defined
UBS Europe SE	69,042	$147,059	22.9%	Defined
UBS Securities LLC	40	$85	0.0%	Defined

ARDSLEY ADVISORY PARTNERS LP

$639,000

0.81%

300,000

VANGUARD FIDUCIARY TRUST CO

$635,255

0.80%

298,242

XTX Topco Ltd

$542,675

0.68%

254,777

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	254,777	$542,675	100.0%	Defined

WOODSTOCK CORP

$517,070

0.65%

242,756

STATE STREET CORP

$497,938

0.63%

233,774

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SSGA FUNDS MANAGEMENT, INC. joint	233,774	$497,938	100.0%	Defined

IEQ CAPITAL, LLC

$440,043

0.56%

206,593

CANTOR FITZGERALD, L. P.

$426,000

0.54%

200,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Cantor Fitzgerald & Co.	200,000	$426,000	100.0%	Defined

Caption Management, LLC

$351,450

0.44%

165,000

CITADEL ADVISORS LLC

$348,468

0.44%

163,600

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	163,600	$348,468	100.0%	Defined

WELLS FARGO & COMPANY/MN

$345,775

0.44%

162,336

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO ADVISORS FINANCIAL NETWORK, LLC	154,886	$329,907	95.4%	Defined
WELLS FARGO CLEARING SERVICES, LLC	7,450	$15,868	4.6%	Defined

Invesco Ltd.

$339,820

0.43%

159,540

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Capital Management LLC	159,540	$339,820	100.0%	Defined

BNP PARIBAS ARBITRAGE, SA

$334,938

0.42%

157,248

Palo Alto Investors LP

$331,660

0.42%

155,709

Point72 Asset Management, L.P.

$328,889

0.42%

154,408

Connor, Clark & Lunn Investment Management Ltd.

$328,641

0.41%

154,292

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Manager 1	154,292	$328,641	100.0%	Sole

Man Group plc

$325,278

0.41%

152,713

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Numeric Investors LLC	152,713	$325,278	100.0%	Defined

Jain Global LLC

$280,099

0.35%

131,502

TWO SIGMA INVESTMENTS, LP

$272,318

0.34%

127,849

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$250,488

0.32%

117,600

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	117,600	$250,488	100.0%	Other

JPMORGAN CHASE & CO

$233,400

0.29%

109,578

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	4,283	$9,122	3.9%	Defined
J.P. Morgan Securities LLC	104,501	$222,587	95.4%	Defined
J.P. Morgan Securities plc	794	$1,691	0.7%	Defined

NORTHERN TRUST CORP

$231,930

0.29%

108,888

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	108,888	$231,930	100.0%	Defined

KENNEDY CAPITAL MANAGEMENT LLC

$208,156

0.26%

97,726

CANADA PENSION PLAN INVESTMENT BOARD

$200,859

0.25%

94,300

Squarepoint Ops LLC

$200,322

0.25%

94,048

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	94,048	$200,322	100.0%	Defined

Russell Investments Group, Ltd.

$192,450

0.24%

90,353

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Russell Investment Management, LLC joint	41,317	$88,005	45.7%	Defined
Russell Investments Capital, LLC joint	12,891	$27,457	14.3%	Other
Russell Investments France SAS	12,616	$26,872	14.0%	Defined
Russell Investments Trust Company joint	23,529	$50,116	26.0%	Other

Mariner, LLC

$192,422

0.24%

90,339

Chicago Partners Investment Group LLC

$178,885

0.23%

83,984

ROYAL BANK OF CANADA

$169,936

0.21%

79,783

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC CMA LTD.	29	$61	0.0%	Defined
RBC Capital Markets, LLC	79,668	$169,692	99.9%	Defined
Held directly	86	$183	0.1%	Sole

Cerity Partners LLC

$154,876

0.20%

72,712

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$140,793

0.18%

66,100

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	66,100	$140,793	100.0%	Other

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$124,387

0.16%

58,398

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	58,398	$124,387	100.0%	Other

CAPTRUST FINANCIAL ADVISORS

$110,287

0.14%

51,778

WEALTH ENHANCEMENT ADVISORY SERVICES, LLC

$101,213

0.13%

47,518

Quadrature Capital Ltd

$98,073

0.12%

46,044

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Quadrature US Inc.	46,044	$98,073	100.0%	Other

Graham Capital Management, L.P.

$92,774

0.12%

43,556

Creative Planning

$81,366

0.10%

38,200

AlphaCentric Advisors LLC

$80,207

0.10%

37,656

MERCER GLOBAL ADVISORS INC /ADV

$78,599

0.10%

36,901

INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC

$78,277

0.10%

36,750

PRICE T ROWE ASSOCIATES INC /MD/

$74,743

0.09%

35,091

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
T. Rowe Price International Ltd	35,091	$74,743	100.0%	Defined

BANK OF AMERICA CORP /DE/

$72,260

0.09%

33,925

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BOFA SECURITIES, INC.	33,925	$72,260	100.0%	Defined

TWO SIGMA SECURITIES, LLC

$69,902

0.09%

32,818

SIMPLEX TRADING, LLC

$61,678

0.08%

28,957

Arax Advisory Partners

$60,990

0.08%

28,634

STATE OF WISCONSIN INVESTMENT BOARD

$60,492

0.08%

28,400

RHUMBLINE ADVISERS

$56,768

0.07%

26,652

Providence Wealth Advisors, LLC

$53,250

0.07%

25,000

Schonfeld Strategic Advisors LLC

$44,559

0.06%

20,920

SEI INVESTMENTS CO

$44,173

0.06%

20,739

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SEI INVESTMENTS MANAGEMENT CORP	718	$1,529	3.5%	Sole
SEI TRUST CO	20,021	$42,644	96.5%	Sole

Hikari Power Ltd

$42,642

0.05%

20,020

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Yasumitsu Shigeta	20,020	$42,642	100.0%	Defined

StoneX Group Inc.

$41,100

0.05%

19,296

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STONEX FINANCIAL INC.	19,296	$41,100	100.0%	Defined

Federation des caisses Desjardins du Quebec

$38,565

0.05%

18,106

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Desjardins Securities inc.	18,106	$38,565	100.0%	Defined

FMR LLC

$38,103

0.05%

17,889

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	17,688	$37,675	98.9%	Defined
STRATEGIC ADVISERS LLC	201	$428	1.1%	Defined

Vanguard Global Advisers, LLC

$37,673

0.05%

17,687

LETKO, BROSSEAU & ASSOCIATES INC

$36,849

0.05%

17,300

Y-Intercept (Hong Kong) Ltd

$36,388

0.05%

17,084

Merit Financial Group, LLC

$35,493

0.04%

16,664

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
AQR Capital Management	15,860	$33,781	95.2%	Other
Held directly	804	$1,712	4.8%	Sole

BRIGHTON JONES LLC

$34,386

0.04%

16,144

Virtu Financial LLC

$33,709

0.04%

15,826

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Virtu Americas LLC	15,826	$33,709	100.0%	Defined

Activest Wealth Management

$31,950

0.04%

15,000

Cetera Investment Advisers

$31,308

0.04%

14,699

Focus Partners Wealth

$29,528

0.04%

13,863

LPL Financial LLC

$28,363

0.04%

13,316

King Wealth Management Group

$27,051

0.03%

12,700

JANE STREET GROUP, LLC

$23,217

0.03%

10,900

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	10,900	$23,217	100.0%	Defined

Caitong International Asset Management Co., Ltd

$23,138

0.03%

10,863

JANE STREET GROUP, LLC

$22,152

0.03%

10,400

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	10,400	$22,152	100.0%	Defined

INSPIRION WEALTH ADVISORS, LLC

$21,300

0.03%

10,000

Global Retirement Partners, LLC

$21,300

0.03%

10,000

Integrated Wealth Concepts LLC

$18,669

0.02%

8,765

BARCLAYS PLC

$12,287

0.02%

5,769

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS CAPITAL INC.	5,769	$12,287	100.0%	Defined

UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC

$10,277

0.01%

4,825

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Group AG	4,825	$10,277	100.0%	Defined

Farther Finance Advisors, LLC

$9,578

0.01%

4,497

EverSource Wealth Advisors, LLC

$8,576

0.01%

4,027

Optiver Holding B.V.

$8,566

0.01%

4,022

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Optiver VOF	4,022	$8,566	100.0%	Defined

Essential Partners LLC

$4,409

0.01%

2,070

Key facts CIK 1341235 CUSIP 01438T106 13F (30d) 90 filings 88 filers Visit website Investor relations