CSS LLC’s Ionis Pharmaceuticals IONS Stock Holding History

CSS LLC’s Portfolio IONS Stock Details IONS Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-4,000	Closed	-$262K	–	1129
2025 Q3	$262K	Buy	+4,000	New	+$195K	0.01%	705
2020 Q1	–	Sell	-15,000	Closed	-$906K	–	694
2019 Q4	$906K	Hold	15,000	–	–	0.05%	267
2019 Q3	$899K	Buy	15,000 +9,000	+150%	+$587K	0.06%	236
2019 Q2	$386K	Sell	6,000 -1,200	-17%	-$84.8K	0.02%	347
2019 Q1	$585K	Sell	7,200 -2,100	-23%	-$135K	0.04%	284
2018 Q4	$503K	Buy	9,300 +1,200	+15%	+$61.2K	0.03%	284
2018 Q3	$418K	Buy	+8,100	New	+$381K	0.02%	326
2018 Q2	–	Sell	-8,000	Closed	-$352K	–	551
2018 Q1	$352K	Sell	8,000 -14,000	-64%	-$711K	0.02%	350
2017 Q4	$1.11M	Buy	22,000 +10,000	+83%	+$548K	0.05%	220
2017 Q3	$608K	Buy	+12,000	New	+$629K	0.03%	320
2016 Q1	–	Sell	-5,000	Closed	-$310K	–	699
2015 Q4	$310K	Buy	+5,000	New	+$270K	0.02%	464
2014 Q3	–	Sell	-10,000	Closed	-$344K	–	772
2014 Q2	$344K	Buy	+10,000	New	+$315K	0.01%	542

Other funds holding IONS

Fidelity Investments

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Capital World Investors

Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Wellington Management Group

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

T. Rowe Price Investment Management

T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return

Two Sigma Investments

Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return

Geode Capital Management

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return