AMERICAN CENTURY COMPANIES INC

Position in AMPH — Amphastar Pharmaceuticals, Inc.

CIK 748054 KANSAS CITY, MO

Back to AMPH Full portfolio

Position in AMPH

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$19,933,569

+$2,115,871 QoQ

Shares Held

1,017,538

+52.9% QoQ

Ownership

2.31%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Jun 2021

19 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in AMPH Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - Specialty & Generic

Healthcare · as of Mar 31, 2026

AMERICAN CENTURY COMPANIES INC holds $762,972,194 across 32 Drug Manufacturers - Specialty & Generic names. AMPH ranks #8 (2.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ALKS	Alkermes plc.	6,072,103	$214,709,562
2	LNTH	Lantheus Holdings, Inc.	1,781,106	$135,096,890
3	ZTS	Zoetis Inc.	834,384	$98,632,532
4	VTRS	Viatris Inc	4,629,065	$62,538,668
5	UTHR	UNITED THERAPEUTICS Corp	69,368	$41,133,836
6	RDY	Dr Reddys Laboratories Ltd	1,661,333	$23,009,462
7	EBS	Emergent BioSolutions Inc.	2,425,722	$20,133,492
8	AMPH	Amphastar Pharmaceuticals, Inc. This page	1,017,538	$19,933,569

All Filings in AMPH

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19 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$19,933,569	1,017,538	+52.9%	Shares	Defined	2026-05-15
2025-12-31	$17,817,698	665,336	+130.6%	Shares	Defined	2026-02-13
2025-09-30	$7,690,790	288,585	+23.8%	Shares	Defined	2025-11-12
2025-06-30	$5,353,376	233,161	-24.3%	Shares	Defined	2025-08-12
2025-03-31	$8,928,717	307,993	-34.7%	Shares	Defined	2025-05-13
2024-12-31	$17,525,991	472,017	-26.2%	Shares	Defined	2025-02-11
2024-09-30	$31,039,399	639,592	-13.6%	Shares	Defined	2024-11-12
2024-06-30	$29,616,320	740,408	+19.7%	Shares	Defined	2024-08-07
2024-03-31	$27,164,658	618,644	+83.2%	Shares	Defined	2024-05-14
2023-12-31	$20,886,126	337,690	+156.6%	Shares	Defined	2024-02-13
2023-06-30	$7,563,569	131,609	+8.9%	Shares	Defined	2023-08-14
2023-03-31	$4,530,787	120,821	+211.4%	Shares	Defined	2023-05-11
2022-12-31	$1,087,176	38,800	-30.7%	Shares	Defined	2023-02-13
2022-09-30	$1,573,038	55,980	+23.6%	Shares	Defined	2022-11-14
2022-06-30	$1,575,743	45,293	-42.1%	Shares	Defined	2022-08-12
2022-03-31	$2,808,457	78,230	-16.3%	Shares	Defined	2022-05-11
2021-12-31	$2,177,894	93,512	+11.0%	Shares	Defined	2022-02-07
2021-09-30	$1,601,041	84,221	-9.7%	Shares	Defined	2021-11-10
2021-06-30	$1,880,686	93,288	—	Shares	Defined	2021-08-05
No filing history on record for this holder in this stock.