Aldeyra Therapeutics, Inc. (ALDX) Insider Trading
Over the last 3 months, ALDX insiders made 3 open-market buys and 0 sales, a net purchase of $524K (SEC Form 4). Multiple insiders bought within days of each other (cluster buying). Over the last 6 months, 98 institutions increased and 89 reduced their position (13F).
Insider Activity
Sentiment
100/100
Buys (3m)
3
Sells (3m)
0
Net (3m)
$523.5K
Insiders buyingCluster buying
Insider trades by month Buys Sells
Aug
Oct
Apr
Aug
Mar
Jun
Context3-month price -66%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 5, 2026 | Brady Todd Cdirector, officer: President and CEO | Buy | 250,000 | $1.67 |
| Mar 31, 2026 | Brady Todd Cdirector, officer: President and CEO | Grant | 1,880,510 | $1.77 |
| Mar 31, 2026 | Brady Todd Cdirector, officer: President and CEO | Grant | 632,318 | — |
| Mar 20, 2026 | DOUGLAS RICHARDdirector | Buy | 70,000 | $1.40 |
| Mar 19, 2026 | Alfieri Michaelofficer: Principal Financial Officer | Buy | 5,000 | $1.42 |
| Aug 15, 2025 | Alfieri Michaelofficer: Principal Financial Officer | Buy | 2,500 | $5.30 |
| Aug 13, 2025 | Machatha Stephenofficer: Chief Development Officer | Sell | 22,073 | $5.15 |
| Jun 12, 2025 | Walker Nealdirector | Grant | 62,728 | $2.69 |
| Jun 12, 2025 | DOUGLAS RICHARDdirector | Grant | 14,476 | $2.69 |
| Jun 12, 2025 | DOUGLAS RICHARDdirector | Grant | 1,689 | $2.69 |
| Jun 12, 2025 | Phillips Gary M.director | Grant | 62,728 | $2.69 |
| Jun 12, 2025 | Phillips Gary M.director | Grant | 4,825 | $2.69 |
| Jun 12, 2025 | JOYCE MARTIN JOSEPHdirector | Grant | 1,689 | $2.69 |
| Jun 12, 2025 | JOYCE MARTIN JOSEPHdirector | Grant | 7,238 | $2.69 |
| Jun 12, 2025 | JOYCE MARTIN JOSEPHdirector | Grant | 62,728 | $2.69 |
| Jun 12, 2025 | Bronstein Bendirector | Grant | 3,619 | $2.69 |
| Jun 12, 2025 | Bronstein Bendirector | Grant | 3,860 | $2.69 |
| Jun 12, 2025 | Phillips Gary M.director | Grant | 3,619 | $2.69 |
| Jun 12, 2025 | Miller-Rich Nancydirector | Grant | 2,413 | $2.69 |
| Jun 12, 2025 | Bronstein Bendirector | Grant | 62,728 | $2.69 |
| Jun 12, 2025 | Miller-Rich Nancydirector | Grant | 62,728 | $2.69 |
| Jun 12, 2025 | Walker Nealdirector | Grant | 2,413 | $2.69 |
| Jun 12, 2025 | DOUGLAS RICHARDdirector | Grant | 62,728 | $2.69 |
| Apr 18, 2025 | Clark William Ddirector | Grant | 76,760 | $2.19 |
| Apr 7, 2025 | PERCEPTIVE ADVISORS LLC10 percent owner | Sell | 3,400,000 | $1.42 |
| Mar 6, 2025 | Machatha Stephenofficer: Chief Development Officer | Grant | 202,427 | $6.17 |
| Oct 21, 2024 | Miller-Rich Nancydirector | Buy | 509 | $10.13 |
| Oct 21, 2024 | Miller-Rich Nancydirector | Buy | 413 | $12.81 |
| Aug 14, 2024 | Machatha Stephenofficer: Chief Development Officer | Sell | 16,041 | $4.74 |
| Aug 14, 2024 | Greenberg Bruceofficer: See Remarks | Sell | 10,834 | $4.74 |
Source: ALDX SEC Form 4 filings, latest Jun 5, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their ALDX positions over the last 6 months (SEC Form 13F).
Increased
98
New positions
37
Reduced
89
Sold out
41
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| KNOLL CAPITAL MANAGEMENT, LLC | Unchanged | 5.5M | May 15, 2026 |
| KNOLL CAPITAL MANAGEMENT, LLC | Unchanged | 5.5M | Feb 17, 2026 |
| PERCEPTIVE ADVISORS LLC | Reduced | 4.2M | Feb 17, 2026 |
| BLACKROCK, INC. | Increased | 3.9M | Feb 12, 2026 |
| BLACKROCK, INC. | Reduced | 3.8M | May 13, 2026 |
| VANGUARD GROUP INC | Increased | 3.7M | Jan 29, 2026 |
| AQR CAPITAL MANAGEMENT LLC | Increased | 2.8M | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 2.4M | May 15, 2026 |
| KINGDON CAPITAL MANAGEMENT, L.L.C. | Increased | 2.2M | May 15, 2026 |
| KINGDON CAPITAL MANAGEMENT, L.L.C. | Increased | 1.9M | Feb 17, 2026 |
| D. E. SHAW & CO., INC. | Increased | 1.6M | Feb 17, 2026 |
| 683 CAPITAL MANAGEMENT, LLC | Increased | 1.5M | Feb 17, 2026 |
| 683 CAPITAL MANAGEMENT, LLC | Reduced | 1.5M | May 15, 2026 |
| ARDSLEY ADVISORY PARTNERS LP | Reduced | 1.4M | Feb 17, 2026 |
| D. E. SHAW & CO., INC. | Reduced | 1.4M | May 15, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.