Brandywine Global Investment Management’s Amphastar Pharmaceuticals AMPH Stock Holding History

Brandywine Global Investment 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
2025 Q4	$2.82M	Buy	+105,417	New	+$2.72M	0.02%	441
2024 Q4	–	Sell	-75,053	Closed	-$3.7M	–	562
2024 Q3	$3.7M	Buy	75,053 +938	+1%	+$41.2K	0.02%	454
2024 Q2	$2.96M	Buy	+74,115	New	+$3.07M	0.02%	501
2018 Q4	–	Sell	-12,800	Closed	-$247K	–	831
2018 Q3	$247K	Hold	12,800	–	–	﹤0.01%	637
2018 Q2	$196K	Hold	12,800	–	–	﹤0.01%	684
2018 Q1	$240K	Buy	+12,800	New	+$241K	﹤0.01%	648
2016 Q3	–	Sell	-23,900	Closed	-$386K	–	938
2016 Q2	$386K	Sell	23,900 -325	-1%	-$4.59K	﹤0.01%	632
2016 Q1	$291K	Hold	24,225	–	–	﹤0.01%	646
2015 Q4	$345K	Buy	24,225 +16,345	+207%	+$216K	﹤0.01%	639
2015 Q3	$93K	Hold	7,880	–	–	﹤0.01%	799
2015 Q2	$139K	Buy	+7,880	New	+$123K	﹤0.01%	768

Other funds holding AMPH

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

TD Asset Management Toronto, Ontario, Canada $115B AUM 41.58% 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

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

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

EIP

Epoch Investment Partners New York $17.6B AUM 34.17% 1-Year Est. Return

BTW

Boston Trust Walden Boston, Massachusetts $13.1B AUM 24.63% 1-Year Est. Return

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

Brandywine Global Investment Management's AMPH Position: Q4 2025 in Review

Brandywine Global Investment Management opened a new position in Amphastar Pharmaceuticals (AMPH) in Q4 2025: 105,417 shares worth $2.82M. The stake represents 0.02% of the portfolio and ranks #441 among its holdings. This is a return to the name: Brandywine Global Investment Management previously reported a position in AMPH as recently as Q3 2024.

Brandywine Global Investment Management first reported a position in AMPH in Q2 2015 and has held it in 11 quarters since. The position peaked at $3.7M in Q3 2024. 235 funds tracked by Wall St. Rank hold AMPH as of Q4 2025.

Brandywine Global Investment Management held 105,417 shares of Amphastar Pharmaceuticals worth $2.82M as of Q4 2025.
Amphastar Pharmaceuticals was a new Brandywine Global Investment Management position in Q4 2025.
Amphastar Pharmaceuticals made up 0.02% of Brandywine Global Investment Management's portfolio in Q4 2025, its #441 holding.
Brandywine Global Investment Management first reported a position in Amphastar Pharmaceuticals in Q2 2015 and has held it in 11 quarters since.
Brandywine Global Investment Management's Amphastar Pharmaceuticals position peaked at $3.7M in Q3 2024.
235 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q4 2025.

Based on Brandywine Global Investment Management's 13F filing for Q4 2025, filed 11 Feb 2026.