• Sep 15, 2026

  $231.50-3.25%

  Comparable industrial instrumentation companies moved only -0.01% on average, with results split between gainers and decliners [1]. MKSI's 3.25% decline was not shared by this cohort [1].

  • 1Peer group

• Sep 14, 2026

  $239.27-10.49%

  MKSI shares fell 10.49%, a far steeper decline than the -2.66% average move among comparable industrial instrumentation companies that day, though most of that group also fell [1].

  • 1Peer group

• Sep 11, 2026

  $267.31+2.09%

  MKSI shares rose 2.09%, in line with a broader move among comparable industrial instruments companies, which gained 2.51% on average, with 5 of 6 peers advancing [1].

  • 1Peer group

• Sep 10, 2026

  $261.84-2.32%

  Shares fell 2.32%, a larger decline than the comparable industrial instrument companies, which averaged a 1.17% drop that day [1].

  • 1Peer group

• Sep 9, 2026

  $268.05+0.96%

• Sep 8, 2026

  $265.50+1.99%

  MKSI rose 1.99% on a day when comparable industrial instrumentation companies moved -0.50% on average, with four of six falling [1]. The move was not shared by that peer group [1].

  • 1Peer group

• Sep 4, 2026

  $260.31+4.27%

  MKSI rose 4.27%, a move not shared by comparable industrial instrumentation companies, which averaged a 0.47% gain with a mixed split of 2 decliners and 4 advancers [1].

  • 1Peer group

Closing prices for MKSI. Summaries describe past sessions only and are not advice, a forecast or a recommendation.

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