ALDX: Aldeyra Therapeutics, Inc. insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 0 sales totaling - in the last 180 days.
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-08-12 | New 13G stake | AQR Capital Management, LLC | 6.22% | SEC | |
| 2026-07-27 | Fell below 5% | BlackRock, Inc. | 1.70% | SEC |
Institutional ownership (Q2 2026)
107 institutions reported holding $74.73M of Aldeyra Therapeutics, Inc. on Form 13F (128 the quarter before). 18 opened a new position and 38 sold out. Shares held by institutions: -2%.
| Largest holders | Shares | Value |
|---|---|---|
| Knoll Capital Management, LLC | 5,475,516 | $11.66M |
| AQR CAPITAL MANAGEMENT LLC | 3,751,558 | $7.99M |
| KINGDON CAPITAL MANAGEMENT, L.L.C. | 2,652,315 | $5.65M |
| VANGUARD CAPITAL MANAGEMENT LLC | 2,361,796 | $5.03M |
| D. E. Shaw & Co., Inc. | 1,940,338 | $4.13M |
| MARSHALL WACE, LLP | 1,506,974 | $3.21M |
| 683 Capital Management, LLC | 1,450,000 | $3.09M |
| JANE STREET GROUP, LLC | 1,375,115 | $2.93M |
| BlackRock, Inc. | 1,257,243 | $2.68M |
| Qube Research & Technologies Ltd | 1,128,803 | $2.40M |
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