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

As of 2026-Q2, AMERICAN CENTURY COMPANIES INC holds 1.9M shares of ALNY (ALNYLAM PHARMACEUTICALS INC).

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

As of 2026-Q2, AMERICAN CENTURY COMPANIES INC's ALNY position is worth $558.1M.

Is AMERICAN CENTURY COMPANIES INC buying or selling ALNY?

In 2026-Q2, AMERICAN CENTURY COMPANIES INC increased their ALNY position (+2.9% change in shares).

When did AMERICAN CENTURY COMPANIES INC first buy ALNY?

Based on available 13F filings, AMERICAN CENTURY COMPANIES INC first reported a position in ALNY in 2018-Q4. They have held the position across 31 quarters.

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AMERICAN CENTURY COMPANIES INC

ALNY
31 quarters

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

Current Value

$558.1M

Current Shares

1.9M

Total Value Change

+$507.6M

Total Shares Change

+1.2M

Quarter-by-Quarter History

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Increased	1.9M	+2.9%	$558.1M	0.2%	$301.03	39
2026-Q1	Increased	1.8M	+21.4%	$596.3M	0.3%	$330.87	45
2025-Q4	Decreased	1.5M	-9.5%	$590.6M	0.3%	$397.65	0
2025-Q3	Decreased	1.6M	-8.5%	$748.5M	0.4%	$456.00	0
2025-Q2	Increased	1.8M	+1.9%	$585M	0.3%	$326.09	38
2025-Q1	Increased	1.8M	+9.8%	$475.4M	0.3%	$270.02	41
2024-Q4	Increased	1.6M	+0.7%	$377.4M	0.2%	$235.31	37
2024-Q3	Increased	1.6M	+17.6%	$438M	0.3%	$275.03	44
2024-Q2	Decreased	1.4M	-1.4%	$329.1M	0.2%	$243.00	0
2024-Q1	Increased	1.4M	+231.1%	$205.3M	0.1%	$149.45	59
2023-Q4	Decreased	414,944	-6.3%	$79.4M	0.1%	$191.41	0
2023-Q3	Increased	442,743	+0.9%	$78.4M	0.1%	$177.10	30
2023-Q2	Decreased	438,871	-1.3%	$83.4M	0.1%	$189.94	0
2023-Q1	Decreased	444,608	-36.5%	$85.1M	0.1%	$200.32	0
2022-Q4	Increased	699,795	+1.0%	$166.3M	0.1%	$237.65	37
2022-Q3	Increased	693,007	+20.5%	$138.7M	0.1%	$200.16	43
2022-Q2	Decreased	574,941	-49.2%	$83.9M	0.1%	$145.85	0
2022-Q1	Increased	1.1M	+12.9%	$184.8M	0.1%	$163.29	41
2021-Q4	Decreased	1M	-6.4%	$170M	0.1%	$169.58	0
2021-Q3	Increased	1.1M	+2.4%	$202.3M	0.1%	$188.81	37
2021-Q2	Decreased	1M	-4.4%	$177.4M	0.1%	$169.52	0
2021-Q1	Increased	1.1M	+1.4%	$154.5M	0.1%	$141.19	37
2020-Q4	Increased	1.1M	+9.1%	$140.3M	0.1%	$129.97	40
2020-Q3	Decreased	989,312	-0.8%	$144M	0.1%	$145.60	0
2020-Q2	Increased	997,186	+145.2%	$147.7M	0.1%	$148.11	58
2020-Q1	Increased	406,628	+47.6%	$44.3M	0.1%	$108.85	40
2019-Q4	Decreased	275,480	-6.2%	$31.7M	0.0%	$115.17	0
2019-Q3	Decreased	293,567	-11.8%	$23.6M	0.0%	$80.42	0
2019-Q2	Decreased	332,687	-53.2%	$24.1M	0.0%	$72.56	0
2019-Q1	Increased	710,850	+2.5%	$66.4M	0.1%	$93.45	30
2018-Q4	New	693,163	-	$50.5M	0.1%	$72.91	41

Other major holders of ALNY: BNP PARIBAS FINANCIAL MARKETS, FMR LLC, Capital World Investors

ALNY31 quarters

ALNY
31 quarters