Millennium Management’s Ionis Pharmaceuticals IONS Stock Holding History

Millennium Management’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
2019 Q3	–	Sell	-200,000	Closed	-$12.9M	–	4357
2019 Q2	$12.9M	Hold	200,000	–	–	0.02%	1076
2019 Q1	$16.2M	Buy	+200,000	New	+$12.9M	0.02%	934
2017 Q2	–	Sell	-200,000	Closed	-$8.04M	–	3634
2017 Q1	$8.04M	Buy	+200,000	New	+$8.98M	0.01%	1153
2015 Q2	–	Sell	-11,000	Closed	-$700K	–	3574
2015 Q1	$700K	Buy	+11,000	New	+$746K	﹤0.01%	2533
2014 Q1	–	Sell	-8,200	Closed	-$327K	–	3677
2013 Q4	$327K	Buy	+8,200	New	+$292K	﹤0.01%	2986

Other funds holding IONS

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return

Royal Bank of Canada Toronto, Ontario, Canada $672B AUM 33.48% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return

Millennium Management's IONS Position: Q2 2026 in Review

Millennium Management reduced its Ionis Pharmaceuticals (IONS) stake by 73% in Q2 2026, selling an estimated $57.4M and leaving 288,872 shares worth $22.9M. The position accounts for 0.01% of the portfolio, ranked #1507.

Millennium Management first reported a position in IONS in Q2 2013 and has held it in 49 quarters since. The position peaked at $105M in Q2 2025. 514 funds tracked by Wall St. Rank hold IONS as of Q2 2026.

Millennium Management held 288,872 shares of Ionis Pharmaceuticals worth $22.9M as of Q2 2026.
Millennium Management sold 762,634 Ionis Pharmaceuticals shares in Q2 2026, an estimated $57.4M.
Ionis Pharmaceuticals made up 0.01% of Millennium Management's portfolio in Q2 2026, its #1507 holding.
Millennium Management first reported a position in Ionis Pharmaceuticals in Q2 2013 and has held it in 49 quarters since.
Millennium Management's Ionis Pharmaceuticals position peaked at $105M in Q2 2025.
514 funds tracked by Wall St. Rank held Ionis Pharmaceuticals as of Q2 2026.

Based on Millennium Management's 13F filing for Q2 2026, filed 14 Aug 2026.