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
2021 Q2	–	Sell	-100,000	Closed	-$4.5M	–	6771
2021 Q1	$4.5M	Buy	+100,000	New	+$5.58M	﹤0.01%	2693
2020 Q1	–	Sell	-100,000	Closed	-$6.04M	–	4162
2019 Q4	$6.04M	Sell	100,000 -50,000	-33%	-$2.98M	0.01%	1765
2019 Q3	$8.99M	Buy	+150,000	New	+$9.78M	0.01%	1350
2017 Q2	–	Sell	-565,900	Closed	-$22.7M	–	3633
2017 Q1	$22.7M	Buy	+565,900	New	+$25.4M	0.04%	609
2015 Q2	–	Sell	-11,700	Closed	-$745K	–	3573
2015 Q1	$745K	Buy	+11,700	New	+$794K	﹤0.01%	2496
2014 Q1	–	Sell	-9,300	Closed	-$371K	–	3676
2013 Q4	$371K	Buy	+9,300	New	+$331K	﹤0.01%	2911

Other funds holding IONS

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

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

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

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

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

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

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

Millennium Management's IONS Position: Q1 2026 in Review

Millennium Management increased its Ionis Pharmaceuticals (IONS) stake by 1,027% in Q1 2026, buying an estimated $75.6M and bringing the position to 1,051,506 shares worth $79M. The position accounts for 0.03% of the portfolio, ranked #563.

Millennium Management first reported a position in IONS in Q2 2013 and has held it in 48 quarters since. The position peaked at $105M in Q2 2025. 493 funds tracked by Wall St. Rank hold IONS as of Q1 2026.

Millennium Management held 1,051,506 shares of Ionis Pharmaceuticals worth $79M as of Q1 2026.
Millennium Management bought 958,244 Ionis Pharmaceuticals shares in Q1 2026, an estimated $75.6M.
Ionis Pharmaceuticals made up 0.03% of Millennium Management's portfolio in Q1 2026, its #563 holding.
Millennium Management first reported a position in Ionis Pharmaceuticals in Q2 2013 and has held it in 48 quarters since.
Millennium Management's Ionis Pharmaceuticals position peaked at $105M in Q2 2025.
493 funds tracked by Wall St. Rank held Ionis Pharmaceuticals as of Q1 2026.

Based on Millennium Management's 13F filing for Q1 2026, filed 15 May 2026.