VOLORIDGE INVESTMENT MANAGEMENT, LLC

Position in AMPH — Amphastar Pharmaceuticals, Inc.

CIK 1556921 JUPITER, FL

Back to AMPH Full portfolio

Position in AMPH

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$1,027,404

-$2,326,168 QoQ

Shares Held

50,912

-70.3% QoQ

Ownership

0.120%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#64

of 208 holders

Holding Since

Sep 2020

19 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in AMPH Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - Specialty & Generic

Healthcare · as of Jun 30, 2026

VOLORIDGE INVESTMENT MANAGEMENT, LLC holds $223,181,502 across 5 Drug Manufacturers - Specialty & Generic names. AMPH ranks #4 (0.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ZTS	Zoetis Inc.	2,416,056	$173,617,784
2	HLN	Haleon plc	4,783,989	$44,634,617
3	COLL	Collegium Pharmaceutical, Inc	83,854	$3,035,514
4	AMPH	Amphastar Pharmaceuticals, Inc. This page	50,912	$1,027,404
5	BIOA	BioAge Labs, Inc.	35,340	$866,183

All Filings in AMPH

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19 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$1,027,404	50,912	-70.3%	Shares	Sole	2026-08-14
2026-03-31	$3,353,572	171,188	-26.0%	Shares	Sole	2026-05-15
2025-12-31	$6,194,347	231,305	-20.9%	Shares	Sole	2026-02-17
2025-09-30	$7,793,605	292,443	-10.2%	Shares	Sole	2025-11-14
2025-06-30	$7,473,755	325,512	+50.7%	Shares	Sole	2025-08-14
2025-03-31	$6,261,897	216,002	+50.6%	Shares	Sole	2025-05-15
2024-12-31	$5,325,778	143,436	+16.2%	Shares	Sole	2025-02-14
2024-09-30	$5,990,785	123,445	-38.7%	Shares	Sole	2024-11-14
2024-06-30	$8,058,920	201,473	-9.2%	Shares	Sole	2024-08-14
2024-03-31	$9,739,238	221,800	-3.0%	Shares	Sole	2024-05-15
2023-12-31	$14,143,177	228,669	-38.4%	Shares	Sole	2024-02-14
2023-09-30	$17,076,546	371,310	+97.6%	Shares	Sole	2023-11-14
2023-06-30	$10,800,854	187,939	+157.6%	Shares	Sole	2023-08-14
2023-03-31	$2,735,400	72,944	-22.9%	Shares	Sole	2023-05-15
2022-12-31	$2,651,280	94,621	-41.7%	Shares	Sole	2023-02-14
2022-09-30	$4,559,449	162,258	-8.3%	Shares	Sole	2022-11-14
2022-06-30	$6,157,203	176,982	+88.1%	Shares	Sole	2022-08-15
2022-03-31	$3,377,113	94,070	+106.6%	Shares	Sole	2022-05-16
2020-09-30	$853,893	45,541	—	Shares	Sole	2020-11-16
No filing history on record for this holder in this stock.