Aldeyra Therapeutics Ownership | Who Owns Aldeyra Therapeutics?
Aldeyra Therapeutics Ownership Summary
Aldeyra Therapeutics is owned by 7.52% institutional investors, 3.09% insiders, and 89.39% retail investors. Knoll capital management is the largest institutional shareholder, holding 9.12% of ALDX shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 2.96% of its assets in Aldeyra Therapeutics shares.
ALDX Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Aldeyra Therapeutics | 7.52% | 3.09% | 89.39% |
| Sector | Healthcare Stocks | 232.64% | 10.66% | -143.30% |
| Industry | Biotech Stocks | 382.13% | 10.41% | -292.54% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Knoll capital management | 5.48M | 9.12% | $28.58M |
| Perceptive advisors | 5.22M | 8.70% | $27.26M |
| Blackrock funding, inc. /de | 3.85M | 6.40% | $19.94M |
| Vanguard group | 3.70M | 6.15% | $19.16M |
| Blackrock | 3.62M | 6.10% | $11.99M |
| Ardsley advisory partners lp | 1.90M | 3.16% | $9.92M |
| Kingdon capital management | 1.33M | 2.22% | $6.95M |
| Geode capital management | 1.17M | 1.95% | $6.06M |
| Kennedy capital management | 1.11M | 1.85% | $5.81M |
| State street | 1.10M | 1.83% | $5.69B |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Knoll capital management | 5.48M | 15.32% | $28.58M |
| Ardsley advisory partners lp | 1.90M | 1.23% | $9.92M |
| Kingdon capital management | 1.33M | 0.86% | $6.95M |
| Perceptive advisors | 5.22M | 0.79% | $27.26M |
| 1492 capital management | 223.32K | 0.44% | $1.16M |
| 683 capital management | 820.00K | 0.22% | $4.28M |
| Palo alto investors lp | 225.47K | 0.22% | $1.18M |
| Alphacentric advisors | 34.91K | 0.18% | $180.84K |
| Kennedy capital management | 1.11M | 0.13% | $5.81M |
| Providence wealth advisors | 25.00K | 0.07% | $104.13K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Perceptive advisors | 5.22M | 0.79% | 1.17M |
| Kennedy capital management | 1.11M | 0.13% | 425.25K |
| Blackrock | 3.62M | 0.00% | 311.16K |
| Bnp paribas arbitrage, snc | 263.41K | 0.00% | 252.80K |
| 1492 capital management | 223.32K | 0.44% | 223.32K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Federated hermes | - | - | -551.09K |
| Morgan stanley | 657.03K | 0.00% | -426.29K |
| Johnson & johnson | - | - | -299.67K |
| 683 capital management | 820.00K | 0.22% | -260.00K |
| Adar1 capital management | - | - | -249.92K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| 1492 capital management | 223.32K | 0.44% | 223.32K | $1.16M |
| State of wisconsin investment board | 60.89K | 0.00% | 60.89K | $317.87K |
| Quantinno capital management lp | 51.32K | 0.00% | 51.32K | $267.91K |
| Graham capital management | 45.92K | 0.00% | 45.92K | $239.71K |
| Alphacentric advisors | 34.91K | 0.18% | 34.91K | $180.84K |
Sold Out
| Holder | Change |
|---|---|
| Nelson, van denburg & campbell wealth management group | -9.00 |
| Capital performance advisors llp | -17.00 |
| Parallel advisors | -30.00 |
| Innealta capital | -46.00 |
| Wolff wiese magana | -113.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Dec 31, 2025 | 30 | -78.26% | 4,523,979 | -88.49% | 7 | 0.18% | 10 | -88.10% | 13 | -48.00% |
| Sep 30, 2025 | 46 | -61.67% | 5,222,346 | -83.31% | 8 | 0.32% | 22 | -63.93% | 10 | -70.59% |
| Jun 30, 2025 | 128 | -4.48% | 34,265,682 | -9.56% | 57 | 1.43% | 66 | 26.92% | 35 | -25.53% |
| Mar 31, 2025 | 12 | -90.32% | 15,581,741 | -57.99% | 26 | 0.67% | 5 | -91.94% | 3 | -88.00% |
| Dec 31, 2024 | 123 | 5.13% | 31,618,255 | -13.84% | 53 | 1.40% | 62 | 3.33% | 25 | 4.17% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard Total Stock Mkt Idx Inv | 1.78M | 2.96% | - |
| Vanguard US Total Market Shares ETF | 1.76M | 2.95% | - |
| iShares Russell 2000 ETF | 1.36M | 2.27% | -11.14K |
| Kennedy Small Cap Select | 692.53K | 1.15% | 57.43K |
| Fidelity Small Cap Index | 526.67K | 0.88% | -7.41K |
| Vanguard Institutional Extnd Mkt Idx Tr | 508.30K | 0.84% | - |
| iShares Russell 2000 Value ETF | 412.16K | 0.69% | - |
| Invesco Dorsey Wright SmallCap Momt ETF | 406.98K | 0.68% | - |
| AZ Fd 1 - AZ Eq - Amer Opps A-EUR Acc | 378.72K | 0.63% | -13.46K |
| iShares Russell 2000 Growth ETF | 363.42K | 0.60% | - |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Mar 19, 2026 | DOUGLAS RICHARD | - | Buy | $98.00K |
| Mar 18, 2026 | Alfieri Michael | Principal Financial Officer | Buy | $7.10K |
| Aug 13, 2025 | Alfieri Michael | Principal Financial Officer | Buy | $13.25K |
| Aug 11, 2025 | Machatha Stephen | Chief Development Officer | Sell | $113.71K |
| Apr 03, 2025 | PERCEPTIVE ADVISORS LLC | - | Sell | $4.83M |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q1 | 2 | - |
| 2025 Q3 | 1 | 1 |
| 2025 Q2 | - | 1 |
| 2025 Q1 | - | - |
| 2024 Q3 | - | 2 |
ALDX Ownership FAQ
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