ALDX — Aldeyra Therapeutics, Inc.
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2016-01-04.
Performance
Technicals
Others in Healthcare
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-06-03 | Brady Todd C President and CEO | Open-market purchase | 250.0K | 1.67 | 418.4K |
| 2026-03-19 | DOUGLAS RICHARD Director | Open-market purchase | 70.0K | 1.40 | 98.0K |
| 2026-03-18 | Alfieri Michael Principal Financial Officer | Open-market purchase | 5.0K | 1.42 | 7.1K |
| 2025-08-13 | Alfieri Michael Principal Financial Officer | Open-market purchase | 2.5K | 5.30 | 13.2K |
| 2025-08-11 | Machatha Stephen Chief Development Officer | Open-market sale | 22.1K | 5.15 | 113.7K |
| 2025-04-03 | PERCEPTIVE ADVISORS LLC | Open-market sale | 3.4M | 1.42 | 4.8M |
| 2025-04-03 | EDELMAN JOSEPH | Open-market sale | 3.4M | 1.42 | 4.8M |
| 2025-04-03 | PERCEPTIVE LIFE SCIENCES MASTER FUND LTD | Open-market sale | 3.4M | 1.42 | 4.8M |
| 2024-08-12 | Machatha Stephen Chief Development Officer | Open-market sale | 16.0K | 4.74 | 76.0K |
| 2024-08-12 | Greenberg Bruce See Remarks | Open-market sale | 10.8K | 4.74 | 51.4K |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| Knoll Capital Management, LLC | 9.3M | 5.5M |
| BlackRock, Inc. | 6.4M | 3.8M |
| AQR CAPITAL MANAGEMENT LLC | 4.8M | 2.8M |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.0M | 2.4M |
| KINGDON CAPITAL MANAGEMENT, L.L.C. | 3.6M | 2.2M |
| 683 Capital Management, LLC | 2.5M | 1.5M |
| D. E. Shaw & Co., Inc. | 2.4M | 1.4M |
| GEODE CAPITAL MANAGEMENT, LLC | 2.1M | 1.3M |
| STATE STREET CORP | 1.9M | 1.1M |
| MILLENNIUM MANAGEMENT LLC | 1.7M | 995.2K |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
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