Picton Mahoney Asset Management’s Amphastar Pharmaceuticals AMPH Stock Holding History

Picton Mahoney Asset Management’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	$470	Hold	24	–	–	﹤0.01%	1231
2025 Q4	$643	Hold	24	–	–	﹤0.01%	1181
2025 Q3	$1K	Hold	24	–	–	﹤0.01%	861
2025 Q2	$1K	Sell	24 -1,584	-99%	-$39.3K	﹤0.01%	734
2025 Q1	$46K	Buy	1,608 +1,584	+6,600%	+$50.6K	﹤0.01%	460
2024 Q4	$1K	Hold	24	–	–	﹤0.01%	605
2024 Q3	$1K	Buy	+24	New	+$1.05K	﹤0.01%	597

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

Picton Mahoney Asset Management's AMPH Position: Q1 2026 in Review

Picton Mahoney Asset Management held its Amphastar Pharmaceuticals (AMPH) position steady in Q1 2026 at 24 shares worth $470. The position accounts for ﹤0.01% of the portfolio, ranked #1231.

Picton Mahoney Asset Management first reported a position in AMPH in Q3 2024 and has held it in 7 quarters since. The position peaked at $46K in Q1 2025. 215 funds tracked by Wall St. Rank hold AMPH as of Q1 2026.

Picton Mahoney Asset Management held 24 shares of Amphastar Pharmaceuticals worth $470 as of Q1 2026.
Picton Mahoney Asset Management left its Amphastar Pharmaceuticals share count unchanged in Q1 2026.
Amphastar Pharmaceuticals made up ﹤0.01% of Picton Mahoney Asset Management's portfolio in Q1 2026, its #1231 holding.
Picton Mahoney Asset Management first reported a position in Amphastar Pharmaceuticals in Q3 2024 and has held it in 7 quarters since.
Picton Mahoney Asset Management's Amphastar Pharmaceuticals position peaked at $46K in Q1 2025.
215 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q1 2026.

Based on Picton Mahoney Asset Management's 13F filing for Q1 2026, filed 13 May 2026.