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Equibles

CSS LLC/IL

Position in IONS — Ionis Pharmaceuticals Inc

CIK 1103646 CHICAGO, IL
Back to IONS Full portfolio

Position in IONS

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$12,074,994
+$6,135,901 QoQ
Shares Held
152,289
+92.5% QoQ
Ownership
0.092%
of shares outstanding
% of Portfolio
1.67%
of 13F equity value
Holder Rank
#104
of 514 holders
Holding Since
Mar 2020
9 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in IONS Over Time

Shares Held

Position Value (USD)

Derivatives in IONS

reported options exposure · as of Mar 31, 2026
CallValue
$0
CallShares
0
PutValue
$150,180
PutShares
2,000

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, 2026

CSS LLC/IL holds $23,787,576 across 16 Biotechnology names. IONS ranks #1 (50.8% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 IONS
Ionis Pharmaceuticals Inc
This page 		152,289 $12,074,994
2 JAZZ
Jazz Pharmaceuticals plc
 29,041 $6,998,009
3 BMRN
Biomarin Pharmaceutical Inc
 22,580 $1,292,027
4 REGN
Regeneron Pharmaceuticals, Inc.
 1,820 $1,134,842
5 HALO
Halozyme Therapeutics, Inc.
 6,520 $510,320
6 TVTX
Travere Therapeutics, Inc.
 8,470 $481,180
7 EXEL
Exelixis, Inc.
 8,709 $473,856
8 INCY
Incyte Corp
 3,856 $437,116

All Filings in IONS

Export CSV
10 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $12,074,994 152,289
2026-03-31 $150,180 2,000
2026-03-31 $5,939,093 79,093
2025-09-30 $261,680 4,000
2024-12-31 $527,896 15,100
2024-09-30 $604,906 15,100
2024-06-30 $719,666 15,100
2024-03-31 $216,750 5,000
2021-03-31 $431,840 9,605
2020-03-31 $241,128 5,100