Who owns Aldeyra Therapeutics, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of ALDX from SEC Form 13F filings across 107 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 107 institutions disclosed 36.5M shares of Aldeyra Therapeutics, Inc. worth $77.7M — about 60.6% of shares outstanding; the largest disclosed holder is Knoll Capital Management, LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
107
13F holders
$77.7M
value, 2026 filers
60.6%
of shares outstanding (36.5M sh)
21
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of ALDX's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | Knoll Capital Management, LLC | 5.5M | $11.7M | 5.4% | 9.1% | 0.0% |
| 2 | AQR CAPITAL MANAGEMENT LLC | 3.8M | $8.0M | 0.0% | 6.2% | +32.6% |
| 3 | KINGDON CAPITAL MANAGEMENT, L.L.C. | 2.7M | $5.6M | 0.6% | 4.4% | +23.2% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 2.4M | $5.0M | 0.0% | 3.9% | -0.1% |
| 5 | D. E. Shaw & Co., Inc. | 1.9M | $4.1M | 0.0% | 3.2% | +38.2% |
| 6 | MARSHALL WACE, LLP | 1.5M | $3.2M | 0.0% | 2.5% | +1062.0% |
| 7 | 683 Capital Management, LLC | 1.4M | $3.1M | 0.2% | 2.4% | -3.3% |
| 8 | JANE STREET GROUP, LLC | 1.4M | $2.9M | 0.0% | 2.3% | +41.9% |
| 9 | BlackRock, Inc. | 1.3M | $2.7M | 0.0% | 2.1% | -66.6% |
| 10 | Qube Research & Technologies Ltd | 1.1M | $2.4M | 0.0% | 1.9% | +1196.3% |
| 11 | ACADIAN ASSET MANAGEMENT LLC | 1.1M | $2.3M | 0.0% | 1.8% | +23.9% |
| 12 | ARDSLEY ADVISORY PARTNERS LP | 975,000 | $2.1M | 0.2% | 1.6% | +2.6% |
| 13 | RENAISSANCE TECHNOLOGIES LLC | 882,000 | $1.9M | 0.0% | 1.5% | +2.2% |
| 14 | VANGUARD PORTFOLIO MANAGEMENT LLC | 794,863 | $1.7M | 0.0% | 1.3% | -1.6% |
| 15 | GOLDMAN SACHS GROUP INC | 725,444 | $1.5M | 0.0% | 1.2% | +33.6% |
| 16 | JACOBS LEVY EQUITY MANAGEMENT, INC | 646,840 | $1.4M | 0.0% | 1.1% | -18.8% |
| 17 | MORGAN STANLEY | 608,321 | $1.3M | 0.0% | 1% | +17.3% |
| 18 | GEODE CAPITAL MANAGEMENT, LLC | 596,029 | $1.3M | 0.0% | 1% | -52.4% |
| 19 | DIMENSIONAL FUND ADVISORS LP | 529,083 | $1.1M | 0.0% | 0.9% | -15.2% |
| 20 | GSA CAPITAL PARTNERS LLP | 472,564 | $1.0M | 0.1% | 0.8% | +91.2% |
| 21 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIPNEW | 421,178 | $897,109 | 0.0% | 0.7% | new |
| 22 | CITADEL ADVISORS LLC | 379,144 | $807,576 | 0.0% | 0.6% | +42.4% |
| 23 | MILLENNIUM MANAGEMENT LLC | 360,350 | $767,546 | 0.0% | 0.6% | -63.8% |
| 24 | UBS Group AG | 301,940 | $643,132 | 0.0% | 0.5% | -43.8% |
| 25 | VANGUARD FIDUCIARY TRUST CO | 298,242 | $635,255 | 0.0% | 0.5% | -11.9% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.