Portolan Capital Management’s Amphastar Pharmaceuticals AMPH Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q1	–	Sell	-131,123	Closed	-$4.87M	–	113
2024 Q4	$4.87M	Sell	131,123 -196,641	-60%	-$8.99M	0.33%	92
2024 Q3	$15.9M	Buy	327,764 +218,901	+201%	+$9.61M	1.15%	23
2024 Q2	$4.35M	Buy	108,863 +17,858	+20%	+$740K	0.36%	92
2024 Q1	$4M	Sell	91,005 -57,411	-39%	-$2.97M	0.3%	94
2023 Q4	$9.18M	Buy	148,416 +15,566	+12%	+$818K	0.8%	44
2023 Q3	$6.11M	Sell	132,850 -49,393	-27%	-$2.69M	0.57%	58
2023 Q2	$10.5M	Sell	182,243 -158,350	-46%	-$7.02M	0.93%	31
2023 Q1	$12.8M	Buy	340,593 +69,802	+26%	+$2.29M	1.22%	23
2022 Q4	$7.59M	Sell	270,791 -11,396	-4%	-$331K	0.75%	47
2022 Q3	$7.93M	Buy	282,187 +7,298	+3%	+$238K	0.84%	40
2022 Q2	$9.56M	Buy	+274,889	New	+$9.81M	0.96%	39