Cornerstone Investment Partners’s Amphastar Pharmaceuticals AMPH Stock Holding History

Cornerstone Investment Partners’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 Q2	–	Sell	-8,028	Closed	-$233K	–	211
2025 Q1	$233K	Sell	8,028 -702	-8%	-$22.4K	0.01%	114
2024 Q4	$324K	Buy	8,730 +5	+0.1%	+$229	0.02%	99
2024 Q3	$423K	Buy	8,725 +270	+3%	+$11.8K	0.02%	75
2024 Q2	$338K	Sell	8,455 -690	-8%	-$28.6K	0.02%	107
2024 Q1	$402K	Hold	9,145	–	–	0.02%	95
2023 Q4	$566K	Hold	9,145	–	–	0.03%	70
2023 Q3	$421K	Sell	9,145 -668	-7%	-$36.4K	0.03%	82
2023 Q2	$564K	Hold	9,813	–	–	0.03%	64
2023 Q1	$368K	Sell	9,813 -1,487	-13%	-$48.7K	0.02%	88
2022 Q4	$317K	Sell	11,300 -600	-5%	-$17.4K	0.02%	101
2022 Q3	$334K	Hold	11,900	–	–	0.02%	90
2022 Q2	$414K	Sell	11,900 -145	-1%	-$5.17K	0.03%	74
2022 Q1	$432K	Buy	12,045 +16	+0.1%	+$454	0.02%	83
2021 Q4	$280K	Buy	+12,029	New	+$246K	0.02%	149

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 $3.37T AUM 44.26% 1-Year Est. Return

Fuller & Thaler Asset Management San Mateo, California $36.7B AUM 74.15% 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

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

Cornerstone Investment Partners's AMPH Position: Q2 2025 in Review

Cornerstone Investment Partners sold out of Amphastar Pharmaceuticals (AMPH) in Q2 2025, closing a stake of 8,028 shares — an estimated $233K sold.

Cornerstone Investment Partners first reported a position in AMPH in Q4 2021 and held it in 14 quarters. The position peaked at $566K in Q4 2023. 245 funds tracked by Wall St. Rank hold AMPH as of Q2 2025.

Cornerstone Investment Partners reported no remaining Amphastar Pharmaceuticals position as of Q2 2025 after selling out during the quarter.
Cornerstone Investment Partners sold 8,028 Amphastar Pharmaceuticals shares in Q2 2025, an estimated $233K.
Cornerstone Investment Partners first reported a position in Amphastar Pharmaceuticals in Q4 2021 and held it in 14 quarters.
Cornerstone Investment Partners's Amphastar Pharmaceuticals position peaked at $566K in Q4 2023.
245 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q2 2025.

Based on Cornerstone Investment Partners's 13F filing for Q2 2025, filed 6 Aug 2025.