ARDSLEY ADVISORY PARTNERS LP
Position in AAOI — Applied Optoelectronics, Inc.
CIK 900529
Norwalk, CT
Position in AAOI
as of Jun 30, 2026
· filed Jul 13, 2026
Position Value
$5,185,600
+$4,314,100 QoQ
Shares Held
35,000
+40.0% QoQ
Ownership
0.041%
of shares outstanding
% of Portfolio
0.58%
of 13F equity value
Holder Rank
#114
of 480 holders
Holding Since
Jun 2023
5 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in AAOI Over Time
Shares Held
Position Value (USD)
Derivatives in AAOI
reported options exposure · as of Sep 30, 2025CallValue
$4,278,450
CallShares
165,000
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 Communication Equipment
Technology · as of Jun 30, 2026ARDSLEY ADVISORY PARTNERS LP holds $32,388,700 across 3 Communication Equipment names. AAOI ranks #3 (16.0% of the industry book) .
All Filings in AAOI
Export CSV
7 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $5,185,600 | 35,000 | Shares | Sole | 2026-07-13 | |
| 2025-12-31 | $871,500 | 25,000 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $9,451,485 | 364,500 | Shares | Sole | 2025-11-14 | |
| 2025-09-30 | $4,278,450 | 165,000 | Call | Sole | 2025-11-14 | |
| 2025-03-31 | $460,500 | 30,000 | Call | Sole | 2025-05-15 | |
| 2023-06-30 | $685,400 | 115,000 | Shares | Sole | 2023-08-14 | |
| 2023-06-30 | $597,788 | 100,300 | Call | Sole | 2023-08-14 | |
| No filing history on record for this holder in this stock. | ||||||