Latest Period
Q2 2026
Security Snapshot
Aldeyra Therapeutics, Inc. - Common Stock, $0.001 par value per share (ALDX) Institutional Ownership
CUSIP: 01438T106
13F Institutional Holders and Ownership History from Q2 2014 to Q2 2026
Institutions Reporting
64
Shares (Excl. Options)
10,511,348
Price
$2.13
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- Security type / class
- Equity / Common Stock, $0.001 par value per share
- Symbol
- ALDX on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 10,511,348
- Total 13F value
- $22,337,629
- Portfolio coverage rank
- 0%
- Share change
- -2,467,759
- Value change
- -$5,092,073
- Number of holders
- 64
- Shares outstanding
- 60,314,437
- SEC-reported price per share
- $1.93
- Insider filing price
- $1.93
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- ALDX - Aldeyra Therapeutics, Inc. - Common Stock, $0.001 par value per share is tracked under CUSIP 01438T106.
- 64 institutions reported positions in Q2 2026.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 127 to 64 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $62,981,538 to $22,337,629.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 64 institutions filings for Q2 2026.
Security key
01438T106
Latest holder period
Q2 2026
13F holders
64
13D/G owners
2
CIK / CUSIP context first
Open Q2 2026 holders
ALDX full holder history
Aldeyra Therapeutics, Inc. SEC filings
Aldeyra Therapeutics, Inc. company facts
Aldeyra Therapeutics, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 01438T106:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
2
Security
ALDX
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| AQR CAPITAL MANAGEMENT LLC | 6.2% | $7,240,507 | 3,751,558 | AQR Capital Management, LLC | 30 Jun 2026 | |||
| BlackRock, Inc. | 1.7% | $2,227,477 | 1,045,764 | BlackRock, Inc. | 30 Jun 2026 |
As of 30 Jun 2026, 64 institutional investors reported holding 10,511,348 shares of Aldeyra Therapeutics, Inc. - Common Stock, $0.001 par value per share (ALDX). This represents 17% of the company’s total 60,314,437 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
53%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Knoll Capital Management, LLC | 9.1% | 5,475,516 | 0% | 6.7% | $11,662,849 |
| AQR CAPITAL MANAGEMENT LLC | 6.2% | 3,751,558 | +33% | 0% | $7,990,819 |
| KINGDON CAPITAL MANAGEMENT, L.L.C. | 4.4% | 2,652,315 | +23% | 0.76% | $5,649,431 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.9% | 2,361,796 | -0.08% | 0% | $5,030,625 |
| D. E. Shaw & Co., Inc. | 3.2% | 1,940,338 | +38% | 0% | $4,132,920 |
| MARSHALL WACE, LLP | 2.5% | 1,506,974 | +1062% | 0% | $3,209,855 |
| 683 Capital Management, LLC | 2.4% | 1,450,000 | -3.3% | 0.28% | $3,088,500 |
| JANE STREET GROUP, LLC | 2.3% | 1,375,115 | +42% | 0% | $2,928,995 |
| BlackRock, Inc. | 2.1% | 1,257,243 | -67% | 0% | $2,677,927 |
| Qube Research & Technologies Ltd | 1.9% | 1,128,803 | +1196% | 0% | $2,404,350 |
| ACADIAN ASSET MANAGEMENT LLC | 1.8% | 1,063,793 | +24% | 0% | $2,262,000 |
| ARDSLEY ADVISORY PARTNERS LP | 1.6% | 975,000 | +2.6% | 0.23% | $2,076,750 |
| RENAISSANCE TECHNOLOGIES LLC | 1.5% | 882,000 | +2.2% | 0% | $1,878,660 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.3% | 794,863 | -1.6% | 0% | $1,693,058 |
| GOLDMAN SACHS GROUP INC | 1.2% | 725,444 | +34% | 0% | $1,545,196 |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 1.1% | 646,840 | -19% | 0% | $1,377,769 |
| MORGAN STANLEY | 1% | 608,321 | +17% | 0% | $1,295,723 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.99% | 596,029 | -52% | 0% | $1,270,111 |
| DIMENSIONAL FUND ADVISORS LP | 0.88% | 529,083 | -15% | 0% | $1,126,664 |
| GSA CAPITAL PARTNERS LLP | 0.78% | 472,564 | +91% | 0.06% | $1,007,000 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 0.7% | 421,178 | 0% | $897,109 | |
| CITADEL ADVISORS LLC | 0.63% | 379,144 | +42% | 0% | $807,576 |
| MILLENNIUM MANAGEMENT LLC | 0.6% | 360,350 | -64% | 0% | $767,546 |
| UBS Group AG | 0.5% | 301,940 | -44% | 0% | $643,132 |
| VANGUARD FIDUCIARY TRUST CO | 0.49% | 298,242 | -12% | 0% | $635,255 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q2 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 10,511,348 | $22,337,629 | -$5,092,073 | $2.13 | 64 |
| 2026 Q1 | 37,269,714 | $62,981,538 | -$20,444,263 | $1.69 | 127 |
| 2025 Q4 | 38,964,894 | $201,775,126 | -$2,038,386 | $5.18 | 135 |
| 2025 Q3 | 39,091,752 | $204,002,195 | +$26,942,734 | $5.22 | 129 |
| 2025 Q2 | 34,234,495 | $131,165,420 | -$14,803,182 | $3.83 | 121 |
| 2025 Q1 | 37,522,553 | $215,581,662 | +$3,357,660 | $5.75 | 124 |
| 2024 Q4 | 37,181,780 | $185,566,183 | +$2,534,433 | $4.99 | 117 |
| 2024 Q3 | 36,411,204 | $196,355,871 | +$6,362,230 | $5.39 | 111 |
| 2024 Q2 | 35,332,656 | $116,899,840 | -$329,270 | $3.31 | 103 |
| 2024 Q1 | 35,411,236 | $115,798,928 | +$808,753 | $3.27 | 101 |
| 2023 Q4 | 35,121,957 | $123,276,317 | -$16,780,776 | $3.51 | 103 |
| 2023 Q3 | 37,775,090 | $252,308,601 | -$9,900,512 | $6.68 | 120 |
| 2023 Q2 | 39,037,773 | $327,514,881 | +$24,184,461 | $8.39 | 119 |
| 2023 Q1 | 35,585,837 | $353,348,951 | +$15,344,761 | $9.93 | 107 |
| 2022 Q4 | 34,171,691 | $237,833,495 | -$18,830,170 | $6.96 | 93 |
| 2022 Q3 | 36,966,565 | $197,399,795 | +$1,459,079 | $5.34 | 85 |
| 2022 Q2 | 36,943,694 | $147,408,805 | -$7,357,330 | $3.99 | 88 |
| 2022 Q1 | 38,636,557 | $171,807,935 | +$10,287,580 | $4.44 | 102 |
| 2021 Q4 | 36,272,402 | $145,130,796 | -$44,887,818 | $4.00 | 110 |
| 2021 Q3 | 39,720,964 | $348,695,759 | -$60,891,971 | $8.78 | 114 |
| 2021 Q2 | 45,258,901 | $512,794,552 | +$153,473,538 | $11.33 | 130 |
| 2021 Q1 | 31,692,851 | $376,513,639 | +$122,609,589 | $11.88 | 107 |
| 2020 Q4 | 22,091,649 | $151,541,784 | -$10,169,396 | $6.86 | 95 |
| 2020 Q3 | 23,807,765 | $176,308,405 | +$68,333,848 | $7.41 | 84 |
| 2020 Q2 | 14,645,367 | $61,066,116 | -$6,590,170 | $4.17 | 79 |