Aldeyra Therapeutics, Inc.
ALDX- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001341235
No open-market purchases or sales by Aldeyra Therapeutics, Inc. insiders were filed in the last 90 days; 107 institutions reported holding it in 13F filings for Q2 2026, worth $77.7M in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Aldeyra Therapeutics, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 128
- −5 vs. Q4 2025
- Shares held
- 37.3M
- +2.09M (+5.9%) vs. Q4 2025
- Total value
- $63.3M
- −$119.2M (−65.3%) vs. Q4 2025
- New holders
- 24
- 50 more added
- Sold out
- 29
- 37 more reduced
3 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ALDX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 107 | $77.7M |
| Q1 2026 | 128 | $63.3M |
| Q4 2025 | 136 | $201.8M |
| Q3 2025 | 131 | $204.2M |
| Q2 2025 | 122 | $130.8M |
| Q1 2025 | 126 | $215.5M |
| Q4 2024 | 119 | $185.6M |
| Q3 2024 | 112 | $196.4M |
| Q2 2024 | 103 | $116.9M |
| Q1 2024 | 101 | $115.8M |
| Q4 2023 | 105 | $123.3M |
| Q3 2023 | 120 | $252.3M |
| Q2 2023 | 119 | $327.5M |
| Q1 2023 | 109 | $353.4M |
| Q4 2022 | 96 | $237.9M |
| Q3 2022 | 89 | $197.4M |
| Q2 2022 | 95 | $147.5M |
| Q1 2022 | 111 | $171.8M |
| Q4 2021 | 115 | $146.7M |
| Q3 2021 | 117 | $348.9M |
| Q2 2021 | 136 | $512.8M |
| Q1 2021 | 108 | $376.7M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Aldeyra Therapeutics, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Citadel Advisors LLC | 266,340 | $450.1K | 0.00% | +266,340 | New |
| Ieq Capital, LLC | 266,518 | $450.4K | 0.00% | +122,319+84.8% | Added |
| Woodstock Corp | 266,756 | $450.8K | 0.04% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 278,442 | $470.6K | 0.00% | +215,535+342.6% | Added |
| HRT Financial LP | 286,444 | $484.0K | 0.00% | +286,444 | New |
| Vanguard Fiduciary Trust Co | 338,621 | $572.3K | 0.00% | +338,621 | New |
| Northern Trust Corp | 374,812 | $633.4K | 0.00% | −4,593−1.2% | Reduced |
| Morgan Stanley | 518,642 | $876.5K | 0.00% | −138,390−21.1% | Reduced |
| UBS Group AG | 537,569 | $908.5K | 0.00% | +441,892+461.9% | Added |
| Goldman Sachs Group Inc | 543,146 | $917.9K | 0.00% | +237,440+77.7% | Added |
| Dimensional Fund Advisors LP | 624,170 | $1.05M | 0.00% | +11,912+1.9% | Added |
| Propel Bio Management, LLC | 730,606 | $1.23M | 0.78% | +730,606 | New |
| Jacobs Levy Equity Management, Inc | 796,816 | $1.35M | 0.01% | −171,935−17.7% | Reduced |
| Vanguard Portfolio Management LLC | 807,778 | $1.37M | 0.00% | +807,778 | New |
| Acadian Asset Management LLC | 858,288 | $1.45M | 0.00% | −121,233−12.4% | Reduced |
| Renaissance Technologies LLC | 863,187 | $1.46M | 0.00% | +513,187+146.6% | Added |
| Ardsley Advisory Partners LP | 950,000 | $1.61M | 0.24% | −500,000−34.5% | Reduced |
| Jane Street Group, LLC | 968,891 | $1.64M | 0.00% | +665,039+218.9% | Added |
| Millennium Management LLC | 995,243 | $1.68M | 0.00% | +951,184+2,158.9% | Added |
| State Street Corp | 1,124,710 | $1.90M | 0.00% | +26,110+2.4% | Added |
| Geode Capital Management, LLC | 1,251,652 | $2.12M | 0.00% | +81,115+6.9% | Added |
| D. E. Shaw & Co., Inc. | 1,403,990 | $2.37M | 0.00% | −197,334−12.3% | Reduced |
| 683 Capital Management, LLC | 1,500,000 | $2.53M | 0.24% | −30,000−2.0% | Reduced |
| Kingdon Capital Management, L.L.C. | 2,152,315 | $3.64M | 0.61% | +302,315+16.3% | Added |
| Vanguard Capital Management LLC | 2,363,742 | $3.99M | 0.00% | +2,363,742 | New |
| AQR Capital Management LLC | 2,829,875 | $4.78M | 0.00% | +1,602,953+130.6% | Added |
| BlackRock, Inc. | 3,763,887 | $6.36M | 0.00% | −86,216−2.2% | Reduced |
| Knoll Capital Management, LLC | 5,475,516 | $9.25M | 5.14% | 00.0% | Unchanged |
| Perceptive Advisors LLC | 0 | $0 | 0.00% | −4,185,632−100.0% | Sold out |
| 1492 Capital Management LLC | 0 | $0 | 0.00% | −223,317−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −121,900−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −94,094−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −83,449−100.0% | Sold out |
| State of Wisconsin Investment Board | 0 | $0 | 0.00% | −81,366−100.0% | Sold out |
| Quantinno Capital Management LP | 0 | $0 | 0.00% | −45,988−100.0% | Sold out |
| ACT Capital Management, LLC | 0 | $0 | 0.00% | −41,000−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −39,755−100.0% | Sold out |
| Ameriprise Financial Inc | 0 | $0 | 0.00% | −35,304−100.0% | Sold out |
| SEI Investments Co | 0 | $0 | 0.00% | −33,287−100.0% | Sold out |
| American Century Companies Inc | 0 | $0 | 0.00% | −32,460−100.0% | Sold out |
| MetLife Investment Management | 0 | $0 | 0.00% | −29,531−100.0% | Sold out |
| Axq Capital, LP | 0 | $0 | 0.00% | −26,810−100.0% | Sold out |
| Joseph P. Lucia & Associates, LLC | 0 | $0 | 0.00% | −26,732−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −24,480−100.0% | Sold out |
| Connor, Clark & Lunn Investment Management Ltd. | 0 | $0 | 0.00% | −23,858−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −18,595−100.0% | Sold out |
| Pallas Capital Advisors LLC | 0 | $0 | 0.00% | −17,338−100.0% | Sold out |
| PFG Investments, LLC | 0 | $0 | 0.00% | −15,500−100.0% | Sold out |
| Jones Financial Companies LLLP | 0 | $0 | 0.00% | −15,000−100.0% | Sold out |
| Regal Investment Advisors LLC | 0 | $0 | 0.00% | −13,565−100.0% | Sold out |
| Public Employees Retirement System of Ohio | 0 | $0 | 0.00% | −13,388−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −12,000−100.0% | Sold out |
| Voya Investment Management LLC | 0 | $0 | 0.00% | −10,066−100.0% | Sold out |
| Clearstead Advisors, LLC | 0 | $0 | 0.00% | −10,007−100.0% | Sold out |
| Washington Trust Advisors, Inc. | 0 | $0 | 0.00% | −2,800−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −1,705−100.0% | Sold out |
| Advisor Group Holdings, Inc. | 0 | $0 | 0.00% | −40−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| CIBC Private Wealth Group, LLC | – | – | – | – | Not filed |
| Global Retirement Partners, LLC | – | – | – | – | Not filed |