Aldeyra Therapeutics, Inc.
Ownership
Ownership Structure
Who owns Aldeyra Therapeutics, Inc. (ALDX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 81.1% of the shares are freely tradable; institutional investors hold 62.8%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Knoll Capital Management LP | 9.08 | 5,475,516 | +0.0 | 06/30/2026 |
| AQR Capital Management LLC | 6.22 | 3,751,558 | +32.6 | 06/30/2026 |
| Kingdon Capital Management LLC | 4.40 | 2,652,315 | +23.2 | 06/30/2026 |
| Vanguard Capital Management, LLC | 3.92 | 2,361,796 | -0.1 | 06/30/2026 |
| D. E. Shaw & Co LP | 3.22 | 1,940,338 | +38.2 | 06/30/2026 |
| Marshall Wace Asset Management Ltd | 2.50 | 1,506,974 | +1,062.0 | 06/30/2026 |
| 683 Capital Management LLC | 2.49 | 1,500,000 | -2.0 | 03/31/2026 |
| Jane Street Group LLC | 2.28 | 1,375,115 | +41.9 | 06/30/2026 |
| BlackRock Inc | 2.08 | 1,257,243 | -66.6 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.96 | 1,784,433 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.