Aldeyra Therapeutics, Inc.: which funds bought and sold

Institutions that bought and sold Aldeyra Therapeutics shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 49 institutions that filed 13F reports for both quarters added to or opened positions in Aldeyra Therapeutics, and 81 cut or closed them. Together they sold a net 507K shares, −1.4% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 3.8M shares (+35.9%); index fund managers were net sellers of 4.6M shares (−44.5%). 18 opened a new position and 37 sold out entirely.

Bought, Q2 2026 49 institutions, 18 of them new holders Sold, Q2 2026 81 institutions, 37 of them sold out

Net change, all compared −507K shares (−1.4%)

Net change, active managers +3.8M shares (+35.9%), 16 bought, 13 sold

Buyers versus sellers

institutions compared, 144

49 bought 14 81 sold

Active managers and hedge funds 16 bought · 13 sold · +3.8M

Index fund managers 0 bought · 9 sold · −4.6M

Other institutions 33 bought · 59 sold · +229K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Marshall Wace, LLP Hedge fund	+1.4M +1062.0%	1.5M	$3.2M
Qube Research & Technologies Ltd Hedge fund	+1.0M +1196.3%	1.1M	$2.4M
AQR Capital Management LLC Hedge fund	+922K +32.6%	3.8M	$8M
D. E. Shaw & Co., Inc. Hedge fund	+536K +38.2%	1.9M	$4.1M
Kingdon Capital Management, L.L.C.	+500K +23.2%	2.7M	$5.6M
Arrowstreet Capital, Limited Partnership Hedge fund	+421K New position	421K	$897,109
Jane Street Group, LLC	+406K +41.9%	1.4M	$2.9M
Cantor Fitzgerald, L. P.	+400K New position	400K	$852,000
Gsa Capital Partners LLP	+225K +91.2%	473K	$1M
Acadian Asset Management LLC Active manager	+206K +23.9%	1.1M	$2.3M
Goldman Sachs Group Inc	+182K +33.6%	725K	$1.5M
Xtx Topco Ltd	+180K +239.0%	255K	$542,675
Point72 Asset Management, L.P. Hedge fund	+154K New position	154K	$328,889
Connor, Clark & Lunn Investment Management Ltd.	+154K New position	154K	$328,642
Man Group PLC Hedge fund	+153K New position	153K	$325,279
Jain Global LLC Hedge fund	+132K New position	132K	$280,099
BNP Paribas Financial Markets	+127K +427.4%	157K	$334,938
Citadel Advisors LLC Hedge fund	+113K +42.4%	379K	$807,576
Squarepoint Ops LLC Hedge fund	+94K New position	94K	$200,322
Morgan Stanley	+90K +17.3%	608K	$1.3M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Marshall Wace, LLP Hedge fund	+1.4M +1062.0%	1.5M	$3.2M
Qube Research & Technologies Ltd Hedge fund	+1.0M +1196.3%	1.1M	$2.4M
AQR Capital Management LLC Hedge fund	+922K +32.6%	3.8M	$8M
D. E. Shaw & Co., Inc. Hedge fund	+536K +38.2%	1.9M	$4.1M
Arrowstreet Capital, Limited Partnership Hedge fund	+421K New position	421K	$897,109
Acadian Asset Management LLC Active manager	+206K +23.9%	1.1M	$2.3M
Point72 Asset Management, L.P. Hedge fund	+154K New position	154K	$328,889
Man Group PLC Hedge fund	+153K New position	153K	$325,279
Jain Global LLC Hedge fund	+132K New position	132K	$280,099
Citadel Advisors LLC Hedge fund	+113K +42.4%	379K	$807,576

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Blackrock, Inc. Index funds	−2.5M −66.6%	1.3M	$2.7M
State Street Corp Index funds	−891K −79.2%	234K	$497,939
Propel Bio Management, LLC	−731K Sold out	0	—
Geode Capital Management, LLC Index funds	−656K −52.4%	596K	$1.3M
Millennium Management LLC Hedge fund	−635K −63.8%	360K	$767,546
HRT Financial LP	−286K Sold out	0	—
Northern Trust Corp Index funds	−266K −70.9%	109K	$231,932
UBS Group AG	−236K −43.8%	302K	$643,132
Susquehanna International Group, LLP	−220K −79.0%	58K	$124,388
Bank Of America Corp	−181K −84.2%	34K	$72,260
Exoduspoint Capital Management, LP Hedge fund	−168K Sold out	0	—
Jacobs Levy Equity Management, Inc Active manager	−150K −18.8%	647K	$1.4M
Wellington Management Group LLP Active manager	−149K Sold out	0	—
Charles Schwab Investment Management Inc Index funds	−139K Sold out	0	—
Bank Of New York Mellon Corp	−137K Sold out	0	—
Two Sigma Investments, LP Hedge fund	−96K −42.8%	128K	$272,318
Dimensional Fund Advisors LP	−95K −15.2%	529K	$1.1M
Fox Run Management, L.L.C.	−91K Sold out	0	—
Strs Ohio	−68K Sold out	0	—
Alliancebernstein L.P. Active manager	−68K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	−635K −63.8%	360K	$767,546
Exoduspoint Capital Management, LP Hedge fund	−168K Sold out	0	—
Jacobs Levy Equity Management, Inc Active manager	−150K −18.8%	647K	$1.4M
Wellington Management Group LLP Active manager	−149K Sold out	0	—
Two Sigma Investments, LP Hedge fund	−96K −42.8%	128K	$272,318
Alliancebernstein L.P. Active manager	−68K Sold out	0	—
683 Capital Management, LLC Hedge fund	−50K −3.3%	1.4M	$3.1M
Price T Rowe Associates Inc Active manager	−39K −52.4%	35K	$75,000
First Manhattan Co. Llc. Active manager	−35K Sold out	0	—
Intech Investment Management LLC Active manager	−15K Sold out	0	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
Arrowstreet Capital, Limited PartnershipHedge fund	421K	$897,109
Cantor Fitzgerald, L. P.	400K	$852,000
Point72 Asset Management, L.P.Hedge fund	154K	$328,889
Connor, Clark & Lunn Investment Management Ltd.	154K	$328,642
Man Group PLCHedge fund	153K	$325,279
Jain Global LLCHedge fund	132K	$280,099
Squarepoint Ops LLCHedge fund	94K	$200,322
Quadrature Capital LtdHedge fund	46K	$98,074
Two Sigma Securities, LLC	33K	$69,902
Simplex Trading, LLC	29K	$61,678

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Propel Bio Management, LLC	731K	$1.2M
HRT Financial LP	286K	$484,000
Alliancebernstein L.P.Active manager	68K	$352,965
Exoduspoint Capital Management, LPHedge fund	168K	$283,251
Wellington Management Group LLPActive manager	149K	$251,746
Charles Schwab Investment Management IncIndex funds	139K	$234,959
Bank Of New York Mellon Corp	137K	$231,101
Fox Run Management, L.L.C.	91K	$152,820
Strs Ohio	68K	$115,258
Flow Traders U.S. LLC	56K	$94,000

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 108
Ten largest holders: 62.3%
Index fund managers: 15.5%
Active managers and hedge funds: 39.4%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	16	13	7	7	+3.8M	+35.9%
Index fund managers	0	9	0	1	−4.6M	−44.5%
Other institutions	33	59	11	29	+229K	+1.4%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Aldeyra Therapeutics.

Only managers that filed a holdings report for both quarters are compared (144 here). 3 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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