CSS LLC

SEC CIK: 0001103646
Latest filing: Aug 14, 2026

SEC filings (opens in a new tab)

IONS holding history

Ionis Pharmaceuticals Inc in every 13F filed by CSS LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

IONS overview All 13F holders of IONS Full Q2 2026 holdings

Shares (Q2 2026): 152,289
Value: $12.1M
% of portfolio: 0.5%
Quarters held: 3; Since Q1 2021

Holdings of IONS by CSS LLC, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	152,289	$12.1M	0.5%	+73,196+92.5%	Added	Holders
Q1 2026	79,093	$5.94M	0.3%	+79,093	New	Holders
Q2 2021	0	$0	0.0%	−9,605−100.0%	Sold out	Holders
Q1 2021	9,605	$432.0K	<0.1%	–	–	Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.