Horizon Kinetics Asset Management’s Ionis Pharmaceuticals IONS Stock Holding History

Horizon Kinetics Asset 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
2026 Q2	$865K	Sell	10,904 -524	-5%	-$39.4K	0.01%	174
2026 Q1	$858K	Sell	11,428 -524	-4%	-$41.4K	0.01%	176
2025 Q4	$946K	Sell	11,952 -524	-4%	-$39.5K	0.01%	169
2025 Q3	$816K	Buy	12,476 +524	+4%	+$25.6K	0.01%	187
2025 Q2	$472K	Sell	11,952 -524	-4%	-$17.1K	0.01%	247
2025 Q1	$376K	Hold	12,476	–	–	﹤0.01%	257
2024 Q4	$436K	Buy	12,476 +524	+4%	+$19.6K	0.01%	246
2024 Q3	$479K	Sell	11,952 -524	-4%	-$24.4K	0.01%	239
2024 Q2	$595K	Hold	12,476	–	–	0.01%	204
2024 Q1	$541K	Hold	12,476	–	–	0.01%	209
2023 Q4	$631K	Sell	12,476 -524	-4%	-$25.1K	0.01%	195
2023 Q3	$590K	Hold	13,000	–	–	0.01%	200
2023 Q2	$533K	Hold	13,000	–	–	0.01%	214
2023 Q1	$465K	Buy	13,000 +5,000	+63%	+$188K	0.01%	222
2022 Q4	$302K	Hold	8,000	–	–	0.01%	255
2022 Q3	$354K	Hold	8,000	–	–	0.01%	243
2022 Q2	$296K	Hold	8,000	–	–	0.01%	275
2022 Q1	$296K	Hold	8,000	–	–	0.01%	285
2021 Q4	$243K	Hold	8,000	–	–	0.01%	311
2021 Q3	$268K	Hold	8,000	–	–	0.01%	299
2021 Q2	$319K	Hold	8,000	–	–	0.01%	290
2021 Q1	$360K	Sell	8,000 -1,000	-11%	-$55.8K	0.01%	266
2020 Q4	$509K	Sell	9,000 -4,000	-31%	-$199K	0.02%	235
2020 Q3	$617K	Hold	13,000	–	–	0.02%	218
2020 Q2	$766K	Buy	13,000 +1,000	+8%	+$55.6K	0.03%	184
2020 Q1	$567K	Sell	12,000 -200	-2%	-$11.1K	0.03%	200
2019 Q4	$737K	Hold	12,200	–	–	0.02%	203
2019 Q3	$731K	Hold	12,200	–	–	0.02%	209
2019 Q2	$784K	Hold	12,200	–	–	0.02%	207
2019 Q1	$990K	Buy	+12,200	New	+$787K	0.03%	174

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

Horizon Kinetics Asset Management's IONS Position: Q2 2026 in Review

Horizon Kinetics Asset Management reduced its Ionis Pharmaceuticals (IONS) stake by 4.6% in Q2 2026, selling an estimated $39.4K and leaving 10,904 shares worth $865K. The position accounts for 0.01% of the portfolio, ranked #174.

Horizon Kinetics Asset Management first reported a position in IONS in Q1 2019 and has held it in 30 quarters since. The position peaked at $990K in Q1 2019. 513 funds tracked by Wall St. Rank hold IONS as of Q2 2026.

Horizon Kinetics Asset Management held 10,904 shares of Ionis Pharmaceuticals worth $865K as of Q2 2026.
Horizon Kinetics Asset Management sold 524 Ionis Pharmaceuticals shares in Q2 2026, an estimated $39.4K.
Ionis Pharmaceuticals made up 0.01% of Horizon Kinetics Asset Management's portfolio in Q2 2026, its #174 holding.
Horizon Kinetics Asset Management first reported a position in Ionis Pharmaceuticals in Q1 2019 and has held it in 30 quarters since.
Horizon Kinetics Asset Management's Ionis Pharmaceuticals position peaked at $990K in Q1 2019.
513 funds tracked by Wall St. Rank held Ionis Pharmaceuticals as of Q2 2026.

Based on Horizon Kinetics Asset Management's 13F filing for Q2 2026, filed 11 Aug 2026.