1. MKS Instruments, Inc.
  2. MKS Instruments, Inc. Ownership

Historical shareholding details of Rafferty Asset Management, LLC holdings in MKS Instruments, Inc. (MKSI)

Monthly changes of Rafferty Asset Management, LLC shareholding in MKS Instruments, Inc. over the previous months

Month Name Total no. shares held Percent Holding
Jul 31, 2025 Rafferty Asset Management, Llc 827,064 1.23%
Jun 30, 2025 Rafferty Asset Management, Llc 878,114 1.31%
May 31, 2025 Rafferty Asset Management, Llc 756,203 1.13%
Apr 30, 2025 Rafferty Asset Management, Llc 650,389 0.97%
Mar 31, 2025 Rafferty Asset Management, Llc 537,469 0.80%
Mar 31, 2025 Rafferty Asset Management, Llc 537,469 0.80%
Feb 28, 2025 Rafferty Asset Management, Llc 490,545 0.73%
Jan 31, 2025 Rafferty Asset Management, Llc 539,000 0.80%
Dec 31, 2024 Rafferty Asset Management, Llc 576,566 0.86%
Dec 31, 2024 Rafferty Asset Management, Llc 569,606 0.85%
Nov 30, 2024 Rafferty Asset Management, Llc 540,823 0.80%
Oct 31, 2024 Rafferty Asset Management, Llc 511,948 0.76%
Sep 30, 2024 Rafferty Asset Management, Llc 589,378 0.88%
Sep 30, 2024 Rafferty Asset Management, Llc 589,378 0.88%
Aug 31, 2024 Rafferty Asset Management, Llc 601,265 0.89%
Jul 31, 2024 Rafferty Asset Management, Llc 600,414 0.89%
Jun 30, 2024 Rafferty Asset Management, Llc 543,937 0.81%
Jun 30, 2024 Rafferty Asset Management, Llc 542,441 0.81%
May 31, 2024 Rafferty Asset Management, Llc 528,963 0.79%
Apr 30, 2024 Rafferty Asset Management, Llc 538,361 0.80%
Mar 31, 2024 Rafferty Asset Management, Llc 595,894 0.89%
Mar 31, 2024 Rafferty Asset Management, Llc 610,904 0.91%
Feb 29, 2024 Rafferty Asset Management, Llc 410,273 0.61%
Jan 31, 2024 Rafferty Asset Management, Llc 401,305 0.60%
Dec 31, 2023 Rafferty Asset Management, Llc 399,500 0.60%
Dec 31, 2023 Rafferty Asset Management, Llc 406,271 0.61%
Nov 30, 2023 Rafferty Asset Management, Llc 387,614 0.58%
Oct 31, 2023 Rafferty Asset Management, Llc 342,347 0.51%
Sep 30, 2023 Rafferty Asset Management, Llc 347,007 0.52%
Sep 30, 2023 Rafferty Asset Management, Llc 352,389 0.53%
Aug 31, 2023 Rafferty Asset Management, Llc 335,261 0.50%
Jul 31, 2023 Rafferty Asset Management, Llc 363,893 0.55%
Jun 30, 2023 Rafferty Asset Management, Llc 352,218 0.53%
Jun 30, 2023 Rafferty Asset Management, Llc 356,042 0.53%
May 31, 2023 Rafferty Asset Management, Llc 280,643 0.42%
Mar 31, 2023 Rafferty Asset Management, Llc 260,839 0.39%

View all ownership details of MKS Instruments, Inc.