How many shares of IONS does AMERICAN CENTURY COMPANIES INC own?

As of 2026-Q1, AMERICAN CENTURY COMPANIES INC holds 1.7M shares of IONS (IONIS PHARMACEUTICALS INC).

What is AMERICAN CENTURY COMPANIES INC's IONS position worth?

As of 2026-Q1, AMERICAN CENTURY COMPANIES INC's IONS position is worth $124.9M.

Is AMERICAN CENTURY COMPANIES INC buying or selling IONS?

In 2026-Q1, AMERICAN CENTURY COMPANIES INC increased their IONS position (+2.9% change in shares).

When did AMERICAN CENTURY COMPANIES INC first buy IONS?

Based on available 13F filings, AMERICAN CENTURY COMPANIES INC first reported a position in IONS in 2018-Q4. They have held the position across 30 quarters.

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AMERICAN CENTURY COMPANIES INC

IONS
30 quarters

Position history for AMERICAN CENTURY COMPANIES INC's holdings in IONIS PHARMACEUTICALS INC

Current Value

$124.9M

Current Shares

1.7M

Total Value Change

+$38.2M

Total Shares Change

+58,829

Quarter-by-Quarter History

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q1 Latest	Increased	1.7M	+2.9%	$124.9M	0.1%	$78.66	31
2025-Q4	Increased	1.6M	+17.9%	$127.9M	0.1%	$78.97	35
2025-Q3	Increased	1.4M	+190.3%	$89.8M	0.0%	$64.15	48
2025-Q2	Increased	472,749	+304.9%	$18.7M	0.0%	$39.80	46
2025-Q1	New	116,768	-	$3.5M	0.0%	$31.15	37
2024-Q4	Exited	0	-100.0%	$0	0.0%	$34.92	0
2024-Q3	Decreased	6,293	-53.2%	$252,098	0.0%	$40.85	0
2024-Q2	Increased	13,441	+0.5%	$640,598	0.0%	$47.66	24
2024-Q1	Increased	13,378	+1.2%	$579,936	0.0%	$43.35	25
2023-Q4	Increased	13,216	+1.8%	$668,597	0.0%	$50.59	25
2023-Q3	Increased	12,982	+3.0%	$588,864	0.0%	$45.36	25
2023-Q2	Decreased	12,607	-4.2%	$517,265	0.0%	$41.11	0
2023-Q1	Decreased	13,163	-57.4%	$470,446	0.0%	$34.89	0
2022-Q4	Increased	30,872	+206.3%	$1.2M	0.0%	$37.77	41
2022-Q3	Increased	10,079	+37.0%	$446,000	0.0%	$44.28	31
2022-Q2	Increased	7,355	+31.5%	$272,000	0.0%	$37.56	30
2022-Q1	New	5,594	-	$207,000	0.0%	$35.69	32
2021-Q4	Exited	0	-100.0%	$0	0.0%	$30.54	0
2021-Q3	Decreased	199,346	-11.9%	$6.7M	0.0%	$33.58	0
2021-Q2	Decreased	226,180	-76.0%	$9M	0.0%	$39.55	0
2021-Q1	Decreased	942,678	-24.3%	$42.4M	0.0%	$44.71	0
2020-Q4	Decreased	1.2M	-6.8%	$70.4M	0.1%	$57.20	0
2020-Q3	Decreased	1.3M	-7.8%	$63.4M	0.1%	$48.48	0
2020-Q2	Increased	1.4M	+2.9%	$85.4M	0.1%	$59.40	31
2020-Q1	Decreased	1.4M	-0.6%	$66.6M	0.1%	$48.21	0
2019-Q4	Increased	1.4M	+3.2%	$85.6M	0.1%	$60.28	31
2019-Q3	Increased	1.4M	+0.2%	$82.2M	0.1%	$59.06	30
2019-Q2	Increased	1.4M	+5.3%	$88M	0.1%	$64.27	31
2019-Q1	Decreased	1.3M	-19.0%	$105.6M	0.1%	$81.17	0
2018-Q4	New	1.6M	-	$86.8M	0.1%	$51.36	41

Other major holders of IONS: FMR LLC, Capital World Investors

IONS30 quarters

IONS
30 quarters