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 Q2	–	Sell	-24	Closed	-$470	–	1393
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 $6.73T AUM 46.02% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return

Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Fuller & Thaler Asset Management San Mateo, California $36.7B AUM 74.15% 1-Year Est. Return

D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Picton Mahoney Asset Management's AMPH Position: Q2 2026 in Review

Picton Mahoney Asset Management sold out of Amphastar Pharmaceuticals (AMPH) in Q2 2026, closing a stake of 24 shares — an estimated $470 sold.

Picton Mahoney Asset Management first reported a position in AMPH in Q3 2024 and held it in 7 quarters. The position peaked at $46K in Q1 2025. 211 funds tracked by Wall St. Rank hold AMPH as of Q2 2026.

Picton Mahoney Asset Management reported no remaining Amphastar Pharmaceuticals position as of Q2 2026 after selling out during the quarter.
Picton Mahoney Asset Management sold 24 Amphastar Pharmaceuticals shares in Q2 2026, an estimated $470.
Picton Mahoney Asset Management first reported a position in Amphastar Pharmaceuticals in Q3 2024 and held it in 7 quarters.
Picton Mahoney Asset Management's Amphastar Pharmaceuticals position peaked at $46K in Q1 2025.
211 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q2 2026.

Based on Picton Mahoney Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.