ALDX Institutional Ownership
Who owns Aldeyra Therapeutics, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 108 funds reported holding ALDX at Jun 30, 2026, together owning 60.9% of the company.
- ▼49 buying vs 80 selling
- ▼Held by funds -1.0 pts
- ▼Funds holding -20
- ▲Superinvestors: 3 added, 1 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 108 | 128 | −15.6% |
| In funds' top 10 | 1 | 1 | 0.0% |
| 13F shares | 36.7M | 37.3M | −1.6% |
| Held by funds | 60.9% | 61.9% | −1.0 pts |
| New positions | 18 | 19 | −5.3% |
| Increased | 31 | 50 | −38.0% |
| Reduced | 43 | 36 | +19.4% |
| Sold out | 37 | 29 | +27.6% |
| Calls (shares) | 300K | 300K | 0.0% |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | 0.00 | 0.00 | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in ALDX
All superinvestors →
Who owns ALDX
share of fund held shares- Index and passive funds17.3%
- Active managers and hedge funds72.4%
- Banks and brokers10.0%
- Pensions, insurers and other0.4%
The top 10 holders own 62.3% of all ALDX shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
19 funds changed their position- Chicago Partners Investment Group LLCSold out−84K sh
- Mackenzie Financial CorpNew+38K sh
- Y-Intercept (Hong Kong) LtdSold out−17K sh
- Creative PlanningTrimmed−28K sh
- Inspirion Wealth Advisors, LLCSold out−10K sh
🔒 Free account: see all 19.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | Knoll Capital Management, LLC | 9.08% | 5.5M | $11.7M | 0 |
| 2 | AQR Capital Management LLC | 6.22% | 3.8M | $8M | +922K |
| 3 | Kingdon Capital Management, L.l.c. | 4.40% | 2.7M | $5.6M | +500K |
| 4 | Vanguard Capital Management LLC | 3.92% | 2.4M | $5M | −1,946 |
| 5 | D. E. Shaw & Co., Inc. | 3.22% | 1.9M | $4.1M | +536K |
| 6 | Marshall Wace, LLP | 2.50% | 1.5M | $3.2M | +1.4M |
| 7 | 683 Capital Management, LLC | 2.40% | 1.4M | $3.1M | −50K |
| 8 | Jane Street Group, LLC | 2.28% | 1.4M | $2.9M | +406K |
| 9 | BlackRock, Inc. | 2.08% | 1.3M | $2.7M | −2.5M |
| 10 | Qube Research & Technologies Ltd | 1.87% | 1.1M | $2.4M | +1M |
- Marshall Wace, LLP+1.4M sh+$2.9M
- Qube Research & Technologies Ltd+1M sh+$2.2M
- AQR Capital Management LLC+922K sh+$2M
- D. E. Shaw & Co., Inc.+536K sh+$1.1M
- Kingdon Capital Management, L.l.c.+500K sh+$1.1M
- Arrowstreet Capital, Limited Partnership+421K sh+$897K
- Jane Street Group, LLC+406K sh+$865K
- Cantor Fitzgerald, L. P.+400K sh+$852K
- BlackRock, Inc.−2.5M sh−$5.3M
- State Street Corp−891K sh−$1.9M
- Geode Capital Management, LLC−656K sh−$1.4M
- Millennium Management LLC−635K sh−$1.4M
- Propel Bio Management, LLC−731K sh−$1.2M
- Northern Trust Corp−266K sh−$566K
- UBS Group AG−236K sh−$502K
- Hrt Financial LP−286K sh−$484K
ALDX institutional ownership FAQ
Who owns the most ALDX stock?
In Q2 2026 13F filings the largest holder of ALDX was Knoll Capital Management, LLC, followed by AQR Capital Management LLC and Kingdon Capital Management, L.l.c.. Index fund managers are usually the biggest holders of large companies.
What percentage of ALDX is owned by institutions?
Funds that file 13F reports held 60.9% of ALDX's shares at Jun 30, 2026, compared with 61.9% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying ALDX?
In Q2 2026, 49 funds bought ALDX (18 of them new positions) and 80 sold (37 sold out completely). Among well known investors, 3 added and 1 cut. Our fund sentiment for ALDX is bearish.
What is ALDX's institutional put/call ratio?
Funds reported $0 of ALDX puts against $639K of calls, a put/call ratio of 0.00 (0.00 the quarter before). Market makers and bank trading desks are left out, since their options are mostly hedges.
How current is this ALDX ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.