Quantedge Capital’s Amphastar Pharmaceuticals AMPH Stock Holding History

Quantedge Capital’s Portfolio AMPH Stock Details AMPH Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$264K	Sell	13,500 -78,200	-85%	-$1.91M	0.14%	45
2025 Q4	$2.46M	Buy	91,700 +46,600	+103%	+$1.2M	1.17%	22
2025 Q3	$1.2M	Buy	+45,100	New	+$1.16M	0.66%	29
2023 Q4	–	Sell	-36,389	Closed	-$1.67M	–	110
2023 Q3	$1.67M	Buy	36,389 +5,300	+17%	+$289K	0.91%	36
2023 Q2	$1.79M	Buy	31,089 +24,700	+387%	+$1.09M	0.8%	40
2023 Q1	$240K	Sell	6,389 -28,764	-82%	-$943K	0.09%	116
2022 Q4	$985K	Sell	35,153 -71,047	-67%	-$2.06M	0.33%	81
2022 Q3	$2.98M	Sell	106,200 -15,300	-13%	-$500K	0.92%	37
2022 Q2	$4.23M	Buy	121,500 +90,400	+291%	+$3.23M	0.85%	39
2022 Q1	$1.12M	Buy	+31,100	New	+$882K	0.33%	83

Other funds holding AMPH

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

TD Asset Management Toronto, Ontario, Canada $123B AUM 34.51% 1-Year Est. Return

Fuller & Thaler Asset Management San Mateo, California $29.7B AUM 43.33% 1-Year Est. Return

Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return

American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

BTW

Boston Trust Walden Boston, Massachusetts $12.2B AUM 12.45% 1-Year Est. Return

Quantedge Capital's AMPH Position: Q1 2026 in Review

Quantedge Capital reduced its Amphastar Pharmaceuticals (AMPH) stake by 85% in Q1 2026, selling an estimated $1.91M and leaving 13,500 shares worth $264K. The position accounts for 0.14% of the portfolio, ranked #45.

Quantedge Capital first reported a position in AMPH in Q1 2022 and has held it in 10 quarters since. The position peaked at $4.23M in Q2 2022. 215 funds tracked by Wall St. Rank hold AMPH as of Q1 2026.

Quantedge Capital held 13,500 shares of Amphastar Pharmaceuticals worth $264K as of Q1 2026.
Quantedge Capital sold 78,200 Amphastar Pharmaceuticals shares in Q1 2026, an estimated $1.91M.
Amphastar Pharmaceuticals made up 0.14% of Quantedge Capital's portfolio in Q1 2026, its #45 holding.
Quantedge Capital first reported a position in Amphastar Pharmaceuticals in Q1 2022 and has held it in 10 quarters since.
Quantedge Capital's Amphastar Pharmaceuticals position peaked at $4.23M in Q2 2022.
215 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q1 2026.

Based on Quantedge Capital's 13F filing for Q1 2026, filed 12 May 2026.