Historical shareholding details of Oberweis Micro-Cap Growth holdings in Amphastar Pharmaceuticals Inc (AMPH)

Monthly changes of Oberweis Micro-Cap Growth shareholding in Amphastar Pharmaceuticals Inc over the previous months

Month	Name	Total no. shares held	Percent Holding
Month	Name	Total no. shares held	Percent Holding
Mar 31, 2025	Oberweis Micro-Cap Growth	0	0.00%

Dec 31, 2024	Oberweis Micro-Cap Growth	152,500	0.32%

Sep 30, 2024	Oberweis Micro-Cap Growth	120,000	0.25%

Jun 30, 2024	Oberweis Micro-Cap Growth	91,100	0.19%

Mar 31, 2024	Oberweis Micro-Cap Growth	129,100	0.26%

Dec 31, 2023	Oberweis Micro-Cap Growth	136,400	0.28%

Sep 30, 2023	Oberweis Micro-Cap Growth	91,300	0.19%

Jun 30, 2023	Oberweis Micro-Cap Growth	87,100	0.18%

Mar 31, 2023	Oberweis Micro-Cap Growth	97,300	0.20%

Dec 31, 2022	Oberweis Micro-Cap Growth	77,100	0.16%