SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC
Position in IONS — Ionis Pharmaceuticals Inc
CIK 1638555
Boston, MA
Position in IONS
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$62,422,083
-$43,006,754 QoQ
Shares Held
787,263
-43.9% QoQ
Ownership
0.474%
of shares outstanding
% of Portfolio
1.62%
of 13F equity value
Holder Rank
#38
of 513 holders
Holding Since
Sep 2025
4 quarters on record
Voting authority
Sole 78%
Shared 0%
None 22%
Common Shares in IONS Over Time
Shares Held
Position Value (USD)
Derivatives in IONS
reported options exposure · as of Mar 31, 2026CallValue
$0
CallShares
0
PutValue
$33,790,500
PutShares
450,000
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, 2026SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC holds $293,644,011 across 5 Biotechnology names. IONS ranks #3 (21.3% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ARWR |
Arrowhead Pharmaceuticals, Inc.
|
830,247 | $67,673,432 | |
| 2 | ORKA |
Oruka Therapeutics, Inc.
|
658,301 | $62,650,506 | |
| 3 | IONS |
Ionis Pharmaceuticals Inc
This page
|
787,263 | $62,422,083 | |
| 4 | ABVX |
Abivax S.A.
|
410,000 | $54,636,600 | |
| 5 | BBIO |
BridgeBio Pharma, Inc.
|
621,125 | $46,261,390 |
All Filings in IONS
Export CSV
7 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $62,422,083 | 787,263 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $33,790,500 | 450,000 | Put | Sole | 2026-05-15 | |
| 2026-03-31 | $105,428,837 | 1,404,033 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $23,733,000 | 300,000 | Put | Sole | 2026-02-17 | |
| 2025-12-31 | $115,714,671 | 1,462,706 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $39,193,122 | 599,100 | Call | Sole | 2025-11-14 | |
| 2025-09-30 | $49,065,000 | 750,000 | Shares | Sole | 2025-11-14 | |
| No filing history on record for this holder in this stock. | ||||||