Amphastar Pharma

AMPH

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AMPH

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Major Shareholders Latest
Shareholder
Applied Physics & Chemistry Laboratories, Inc.	15.48%	6.83M	0.53%	+0	03/15/2026
BlackRock, Inc.	12.30%	5.42M	0.33%	-40.67K	03/31/2026
Yongfeng ZhangCo-founder, President, CEO, Chief Scientific Officer & Director	6.06%	2.67M	0.31%	+46.60K	03/15/2026
Dimensional Fund Advisors LP	5.23%	2.31M	0.68%	+277.16K	06/30/2026
State Street Global Advisors, Inc.	3.65%	1.61M	0.29%	+75.73K	03/31/2026
Vanguard Capital Management, LLC	3.50%	1.54M	--	+1.54M	03/31/2026
TD Asset Management, Inc.	3.49%	1.54M	0.81%	-422.01K	03/31/2026
Fuller & Thaler Asset Management, Inc.	3.16%	1.40M	0.11%	+676.00	03/31/2026
Ziping LuoChairman of the Board, Chief Scientist & COO	2.53%	1.11M	0.14%	+22.89K	03/15/2026
Marshall Wace LLP	2.33%	1.03M	0.38%	-211.64K	03/31/2026
American Century Investment Management Inc	2.31%	1.02M	0.85%	+352.20K	03/31/2026
Geode Capital Management, LLC	2.21%	976.65K	0.27%	+89.83K	03/31/2026
Boston Trust Walden National Association	2.14%	944.79K	0.24%	-142.48K	03/31/2026
The Toronto-Dominion Bank	2.04%	898.90K	0.43%	-227.69K	03/31/2026
Vanguard Portfolio Management, LLC	1.79%	787.82K	--	+787.82K	03/31/2026
D. E. Shaw & Co., L.P.	1.51%	665.54K	0.29%	+108.48K	03/31/2026
LSV Asset Management	1.48%	651.71K	1.24%	+541.41K	03/31/2026
Invesco Capital Management LLC	1.30%	571.41K	0.27%	+104.52K	03/31/2026
Renaissance Technologies LLC	1.26%	553.90K	0.06%	+9.20K	03/31/2026
Bridgeway Capital Management, LLC	1.14%	504.77K	0.07%	+15.32K	03/31/2026

All Shareholders