ALDEYRA THERAPEUTICS INC (ALDX) Institutional Ownership Changes & 13F Activity

ALDEYRA THERAPEUTICS INC (ALDX). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q4 2025). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Knoll Capital Management, Llc, Perceptive Advisors Llc, Kingdon Capital Management, L.L.C., D. E. Shaw & Co., Inc., and 683 Capital Management, Llc.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Mercer Global Advisors IncBuy+10,571—10,571$54.76KQ4 2025Feb 18, 2026
Knoll Capital Management, LlcBuy+5,475,516—5,475,516$28.36MQ4 2025Feb 17, 2026
Perceptive Advisors LlcBuy+4,185,632—4,185,632$21.68MQ4 2025Feb 17, 2026
Kingdon Capital Management, L.L.C.Buy+1,850,000—1,850,000$9.58MQ4 2025Feb 17, 2026
D. E. Shaw & Co., Inc.Buy+1,601,324—1,601,324$8.29MQ4 2025Feb 17, 2026
683 Capital Management, LlcBuy+1,530,000—1,530,000$7.93MQ4 2025Feb 17, 2026
Ardsley Advisory Partners LpBuy+1,450,000—1,450,000$7.51MQ4 2025Feb 17, 2026
Aqr Capital Management LlcBuy+1,226,922—1,226,922$6.36MQ4 2025Feb 17, 2026
Bank Of America CorpBuy+410,028—410,028$2.12MQ4 2025Feb 17, 2026
Northern Trust CorpBuy+379,405—379,405$1.97MQ4 2025Feb 17, 2026
Two Sigma Investments, LpBuy+287,364—287,364$1.49MQ4 2025Feb 17, 2026
Palo Alto Investors LpBuy+225,465—225,465$1.17MQ4 2025Feb 17, 2026
Wellington Management Group LlpBuy+178,851—178,851$926.45KQ4 2025Feb 17, 2026
Two Sigma Advisers, LpBuy+121,900—121,900$631.44KQ4 2025Feb 17, 2026
Russell Investments Group, Ltd.Buy+114,126—114,126$591.18KQ4 2025Feb 17, 2026
Point72 Asset Management, L.P.Buy+94,094—94,094$487.41KQ4 2025Feb 17, 2026
Exoduspoint Capital Management, LpBuy+92,390—92,390$478.58KQ4 2025Feb 17, 2026
Qube Research & Technologies LtdBuy+84,928—84,928$439.93KQ4 2025Feb 17, 2026
State Of Wisconsin Investment BoardBuy+81,366—81,366$421.48KQ4 2025Feb 17, 2026
Graham Capital Management, L.P.Buy+76,365—76,365$395.57KQ4 2025Feb 17, 2026
Alliancebernstein L.P.Buy+75,550—75,550$391.35KQ4 2025Feb 17, 2026
Price T Rowe Associates IncBuy+64,262—64,262$333.00KQ4 2025Feb 17, 2026
Susquehanna International Group, LlpBuy+62,907—62,907$325.86KQ4 2025Feb 17, 2026
Captrust Financial AdvisorsBuy+51,995—51,995$269.33KQ4 2025Feb 17, 2026
Quantinno Capital Management LpBuy+45,988—45,988$238.22KQ4 2025Feb 17, 2026
Millennium Management LlcBuy+44,059—44,059$228.23KQ4 2025Feb 17, 2026
Xtx Topco LtdBuy+42,227—42,227$218.74KQ4 2025Feb 17, 2026
Act Capital Management, LlcBuy+41,000—41,000$212.38KQ4 2025Feb 17, 2026
Canada Pension Plan Investment BoardBuy+35,500—35,500$183.89KQ4 2025Feb 17, 2026
Ameriprise Financial IncBuy+35,304—35,304$182.88KQ4 2025Feb 17, 2026
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Frequently asked questions about ALDX activity

  • Which institutional owners are buying ALDX?

    Institutional owners buying ALDX include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in ALDX activity?

    "Buy" means an investor increased their reported position in ALDX compared to the prior reporting period. This reflects growing exposure to ALDEYRA THERAPEUTICS INC (ALDX) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in ALDX increasing?

    Institutional interest in ALDX can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.