Historical shareholding details of Keeley-Teton Advisors, LLC holdings in MKS Instruments, Inc. (MKSI)

Monthly changes of Keeley-Teton Advisors, LLC shareholding in MKS Instruments, Inc. over the previous months

Month	Name	Total no. shares held	Percent Holding
Month	Name	Total no. shares held	Percent Holding
Mar 31, 2025	Keeley-Teton Advisors, Llc	8,712	0.01%

Dec 31, 2024	Keeley-Teton Advisors, Llc	6,388	0.01%

Sep 30, 2024	Keeley-Teton Advisors, Llc	7,400	0.01%

Jun 30, 2024	Keeley-Teton Advisors, Llc	7,400	0.01%

Mar 31, 2024	Keeley-Teton Advisors, Llc	7,400	0.01%

Dec 31, 2023	Keeley-Teton Advisors, Llc	7,400	0.01%

Sep 30, 2023	Keeley-Teton Advisors, Llc	7,400	0.01%

Jun 30, 2023	Keeley-Teton Advisors, Llc	7,400	0.01%

Mar 31, 2023	Keeley-Teton Advisors, Llc	7,400	0.01%