RHUMBLINE ADVISERS

Position in AMPH — Amphastar Pharmaceuticals, Inc.

CIK 1115418 BOSTON, MA

Position in AMPH

as of Mar 31, 2026 · filed May 12, 2026 Compact

Position Value

$1,640,094

-$566,310 QoQ

Shares Held

83,721

+1.6% QoQ

Ownership

0.190%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 48.22565425639923.ToString("F0")% Shared 0.ToString("F0")% None 51.77434574360077.ToString("F0")%

Healthcare · as of Mar 31, 2026

RHUMBLINE ADVISERS holds $438,094,582 across 50 Drug Manufacturers - Specialty & Generic names. AMPH ranks #23 (0.4% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ZTS	Zoetis Inc.	1,229,009	$145,281,153
2	UTHR	UNITED THERAPEUTICS Corp	122,486	$72,631,748
3	NBIX	Neurocrine Biosciences Inc	303,820	$40,025,246
4	ELAN	Elanco Animal Health Inc	1,268,203	$30,348,097
5	VTRS	Viatris Inc	1,941,082	$26,224,017
6	ALKS	Alkermes plc.	449,531	$15,895,416
7	LNTH	Lantheus Holdings, Inc.	194,563	$14,757,603
8	HIMS	Hims & Hers Health, Inc.	643,856	$13,366,450

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$1,640,094	83,721	+1.6%	Shares	Sole	2026-05-12
2025-12-31	$2,206,404	82,390	-8.6%	Shares	Sole	2026-02-13
2025-09-30	$2,401,937	90,129	-5.4%	Shares	Sole	2025-11-06
2025-06-30	$2,187,789	95,287	+7.1%	Shares	Sole	2025-08-12
2025-03-31	$2,578,892	88,958	+1.9%	Shares	Sole	2025-05-29
2024-12-31	$3,242,451	87,327	+1.4%	Shares	Sole	2025-05-29
2024-09-30	$4,179,112	86,114	-4.9%	Shares	Sole	2024-11-12
2024-06-30	$3,623,480	90,587	+1.6%	Shares	Sole	2024-08-01
2024-03-31	$3,916,464	89,193	-4.9%	Shares	Sole	2024-05-09
2023-12-31	$5,797,819	93,740	+0.2%	Shares	Sole	2024-02-08
2023-09-30	$4,300,616	93,512	+2.8%	Shares	Sole	2023-11-09
2023-06-30	$5,227,068	90,953	-0.0%	Shares	Sole	2023-08-08
2023-03-31	$3,411,262	90,967	+7.8%	Shares	Sole	2023-05-11
2022-12-31	$2,363,711	84,358	-0.3%	Shares	Sole	2023-02-14
2022-09-30	$2,376,866	84,586	+6.8%	Shares	Sole	2022-11-10
2022-06-30	$2,754,915	79,187	-1.0%	Shares	Sole	2022-08-11
2022-03-31	$2,871,820	79,995	+2.6%	Shares	Sole	2022-05-12
2021-12-31	$1,816,061	77,976	-0.6%	Shares	Sole	2022-02-10
2021-09-30	$1,490,878	78,426	-14.1%	Shares	Sole	2021-11-12
2021-06-30	$1,841,132	91,326	+8.4%	Shares	Sole	2021-08-05
2021-03-31	$1,543,569	84,256	+2.0%	Shares	Sole	2021-05-06
2020-12-31	$1,660,703	82,581	-0.0%	Shares	Sole	2021-02-10
2020-09-30	$1,548,412	82,582	-5.8%	Shares	Sole	2020-11-12
2020-06-30	$1,968,214	87,632	-6.1%	Shares	Sole	2020-08-13
2020-03-31	$1,385,447	93,359	—	Shares	Sole	2020-05-06
No filing history on record for this holder in this stock.