IONS — ISIS PHARMACEUTICALS INC

Ownership history in CSS LLC/IL  ·  48 quarters on record

This page tracks every 13F SEC filing in which CSS LLC/IL reported a position in ISIS PHARMACEUTICALS INC (IONS). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price — sourced directly from SEC EDGAR 13F filings.

Peak position
0.43% (2019 Q4)
Avg. % of fund
0.05%
First filed
2014 Q1
Last filed
2025 Q3
Quarters held
48
Quarter Action Shares Change Chg % % of Fund Mkt Value Price (EOQ)
2025 Q3 REDUCED 4,000 -11,100 -73.5% 0.01% $262K $65.42
2024 Q4 UNCHANGED 15,100 — 0% 0.02% $528K $34.96
2024 Q3 UNCHANGED 15,100 — 0% 0.03% $605K $40.06
2024 Q2 ADDED 15,100 +10,100 +202.0% 0.04% $720K $47.66
44 older quarters hidden  —  Sign in free or upgrade to Premium to see full history
% of Fund (quarterly)    IONS price (monthly, adj. close)

Other funds also holding IONS

As of 2025 Q4 — sorted by position size

Tweedy, Browne Co LLC 3Y 7Y 15.74% BOONE CAPITAL MANAGEMENT LLC 3Y 10.37% Bellevue Group AG 3Y 7Y 7.2% Tri Locum Partners LP 3Y 5.72% Orion Investment Co 5.43% Exome Asset Management LLC 4.41% Privium Fund Management B.V. 3Y 3.51% Sicart Associates LLC 3Y 7Y 3.43% SECTOR GAMMA AS 3Y 7Y 3.34% SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC 3Y 7Y 2.41%
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