Position in ALDX
as of Jun 30, 2026
· filed Jul 13, 2026
Position Value
$2,076,750
+$471,250 QoQ
Shares Held
975,000
+2.6% QoQ
Ownership
1.62%
of shares outstanding
% of Portfolio
0.23%
of 13F equity value
Holder Rank
#12
of 108 holders
Holding Since
Mar 2020
11 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in ALDX Over Time
Shares Held
Position Value (USD)
Derivatives in ALDX
reported options exposure · as of Jun 30, 2026CallValue
$639,000
CallShares
300,000
PutValue
$0
PutShares
0
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Biotechnology
Healthcare · as of Jun 30, 2026ARDSLEY ADVISORY PARTNERS LP holds $24,823,800 across 5 Biotechnology names. ALDX ranks #5 (8.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
15,000 | $7,450,950 | |
| 2 | JAZZ |
Jazz Pharmaceuticals plc
|
30,000 | $7,229,100 | |
| 3 | ADMA |
Adma Biologics, Inc.
|
600,000 | $5,022,000 | |
| 4 | FTRE |
Fortrea Holdings Inc.
|
175,000 | $3,045,000 | |
| 5 | ALDX |
Aldeyra Therapeutics, Inc.
This page
|
975,000 | $2,076,750 |
All Filings in ALDX
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16 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $639,000 | 300,000 | Call | Sole | 2026-07-13 | |
| 2026-06-30 | $2,076,750 | 975,000 | Shares | Sole | 2026-07-13 | |
| 2026-03-31 | $1,605,500 | 950,000 | Shares | Sole | 2026-05-15 | |
| 2026-03-31 | $507,000 | 300,000 | Call | Sole | 2026-05-15 | |
| 2025-12-31 | $7,511,000 | 1,450,000 | Shares | Sole | 2026-02-17 | |
| 2025-12-31 | $259,000 | 50,000 | Call | Sole | 2026-02-17 | |
| 2025-09-30 | $9,918,000 | 1,900,000 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $7,851,500 | 2,050,000 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $10,062,500 | 1,750,000 | Shares | Sole | 2025-05-15 | |
| 2025-03-31 | $2,300,000 | 400,000 | Call | Sole | 2025-05-15 | |
| 2024-12-31 | $2,994,000 | 600,000 | Call | Sole | 2025-02-14 | |
| 2024-12-31 | $5,738,500 | 1,150,000 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $2,695,000 | 500,000 | Shares | Sole | 2024-11-14 | |
| 2020-09-30 | $460,161 | 62,100 | Shares | Sole | 2020-11-13 | |
| 2020-06-30 | $258,957 | 62,100 | Shares | Sole | 2020-08-14 | |
| 2020-03-31 | $91,637 | 37,100 | Shares | Sole | 2020-05-15 | |
| No filing history on record for this holder in this stock. | ||||||