Historical shareholding details of Portolan Capital Management, LLC holdings in Amphastar Pharmaceuticals Inc (AMPH)

Monthly changes of Portolan Capital Management, LLC 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
Dec 31, 2024	Portolan Capital Management, Llc	131,123	0.28%

Sep 30, 2024	Portolan Capital Management, Llc	327,764	0.68%

Jun 30, 2024	Portolan Capital Management, Llc	108,863	0.23%

Mar 31, 2024	Portolan Capital Management, Llc	91,005	0.19%
Mar 31, 2024	Portolan Capital Management, Llc	270,791	0.55%

Feb 29, 2024	Portolan Capital Management, Llc	270,791	0.56%

Jan 31, 2024	Portolan Capital Management, Llc	270,791	0.57%

Dec 31, 2023	Portolan Capital Management, Llc	148,416	0.30%
Dec 31, 2023	Portolan Capital Management, Llc	270,791	0.57%

Nov 30, 2023	Portolan Capital Management, Llc	270,791	0.57%

Oct 31, 2023	Portolan Capital Management, Llc	270,791	0.55%

Sep 30, 2023	Portolan Capital Management, Llc	132,850	0.28%
Sep 30, 2023	Portolan Capital Management, Llc	270,791	0.55%

Aug 31, 2023	Portolan Capital Management, Llc	270,791	0.55%

Jul 31, 2023	Portolan Capital Management, Llc	270,791	0.56%

Jun 30, 2023	Portolan Capital Management, Llc	182,243	0.37%
Jun 30, 2023	Portolan Capital Management, Llc	270,791	0.56%

May 31, 2023	Portolan Capital Management, Llc	270,791	0.56%

Mar 31, 2023	Portolan Capital Management, Llc	340,593	0.71%