Security key
01438T106
Aldeyra Therapeutics, Inc. - Common Stock, par value $0.001 per share (ALDX)
CUSIP: 01438T106
Q2 2026 13F Holders as of 30 Jun 2026
- Security type / class
- Equity / Common Stock, par value $0.001 per share
- Total 13F shares
- 10,320
- Total 13F value
- $24,982
- Share change
- -936
- SEC-reported price per share
- $2.28
- Number of holders
- 2
- Value change
- -$1,934
- Number of sells
- 2
- Shares outstanding
- 59,794,743
Holder snapshot
5 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
2
Top holders
2
ALDX full security history
Ownership snapshot
Full 13F holder table
Previous quarter: Q1 2026
Aldeyra Therapeutics, Inc. SEC filings
Aldeyra Therapeutics, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 01438T106
Recent filing periods:
Ownership snapshot
Top reported holders of ALDX - Aldeyra Therapeutics, Inc. - Common Stock, par value $0.001 per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Michael Alfieri
Disclosed value leader
Knoll Capital Management,...
Comparable rows
15/15
Latest evidence
31 Mar 2026
3/4/5
13F
Lead comparable stake: 0.01%
Showing 1-6 of 15 holder rows.
Quick read
Michael Alfieri leads the comparable SEC ownership view at 0.01%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Michael Alfieri's linked filing trail.
Comparable ownership
Top 5
Michael Alfieri
0.01%
Knoll Capital Management, LLC
9.2%
BlackRock, Inc.
6.3%
AQR CAPITAL MANAGEMENT LLC
4.7%
VANGUARD CAPITAL MANAGEMENT LLC
4%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Michael Alfieri |
3/4/5
Principal Financial Officer
|
0.01%
|
$10,650
7,500 shares
|
+$20,350 | 18 Mar 2026 |
| Knoll Capital Management, LLC |
13F
Company
|
9.2%
|
$9,253,622
5,475,516 shares
|
— | 31 Mar 2026 |
| BlackRock, Inc. |
13F
Company
|
6.3%
|
$6,360,969
3,763,887 shares
|
— | 31 Mar 2026 |
| AQR CAPITAL MANAGEMENT LLC |
13F
Company
|
4.7%
|
$4,782,489
2,829,875 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
4%
|
$3,994,724
2,363,742 shares
|
— | 31 Mar 2026 |
| KINGDON CAPITAL MANAGEMENT, L.L.C. |
13F
Company
|
3.6%
|
$3,637,412
2,152,315 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
2
Shares
10,320
Rows available
2
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
125
Q2 2026 holders
2
Holder diff
-123
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend