MKS Inc. (MKSI) shares rose 4.7% to $304.99 at the August 7, 2026 close, a moderate gain from the prior close of $291.31. That close is the latest confirmed price for MKSI; a live quote was not available. BestStocks flagged the session as a major change for MKSI. Below, we break down what changed for MKSI, why it matters for investors, how the stock reacted, and the catalysts on the calendar.
What happened
MKSI climbed 4.7% to $304.99
MKSI rose 4.7% in its latest session, moving from $291.31 to $304.99.
ValuationLow confidence
Rel. volume
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Calculating
Vs peers
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No comparable peers
Market cap
—
Earnings in
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Price chart
Aug 10
Not enough price data.
E earnings
F filing
A analyst
V/N other
click a marker to highlight
Change events — click to jump to details
What it means for MKS Inc. investors
For MKS Inc. investors, the recent signals are mixed, leaving the near-term picture neutral / mixed. On the constructive side: Material positive event; Positive 4.7% session move. Weighing against that: MKS Inc. (MKSI) moved -6.16% from $353.80 to $332.00 on 2026-07-16; MKS Inc. (MKSI) moved -4.49% from $368.58 to $352.03 on 2026-07-13. BestStocks rates the overall signal quality low (48/100).
MKSI price reaction
MKSI last traded at $304.99, up $13.68 (+4.70%) from the previous close of $291.31.
The bull and bear case for MKSI stock
Weighing the constructive signals against the risks, here is how the bull and bear case for MKS Inc. (MKSI) lines up on the latest data.
▲ The bullish case
+Material positive event.
+Positive 4.7% session move.
+MKS Inc. (MKSI) moved +4.26% from $330.74 to $344.84 on 2026-07-22.
▼ The bearish case
−MKS Inc. (MKSI) moved -6.16% from $353.80 to $332.00 on 2026-07-16.
Bull vs bear balanceNeutral / Mixed
BearishNeutralBullish
Weighing both sides, BestStocks' composite read of recent signals is roughly balanced, as the bull-versus-bear meter above shows. This is an educational summary of the bull and bear case, not investment advice.
Analyst expectations
No analyst data available
SEC filings watch
No recent filings
Peer context
MKSI+4.7%
Previous notable changes for MKSI
Material / Earnings2026-08-03
MKS Inc. (MKSI) moved +7.52% from $288.31 to $309.98 on 2026-08-03. We checked news, earnings announcements, analyst updates, filings, and corporate actions — no company-specific catalyst was found ahead of the move. Volume remained near its 5-day average.
Material / Earnings2026-07-31
MKS Inc. (MKSI) moved -3.21% from $307.32 to $297.45 on 2026-07-31. We checked news, earnings announcements, analyst updates, filings, and corporate actions — no company-specific catalyst was found. Volume was near its 5-day average, suggesting no unusual trading activity.
Material / Earnings2026-07-30
MKS Inc. (MKSI) moved +1.56% from $288.80 to $293.30 on 2026-07-30. We checked news, earnings announcements, analyst updates, filings, and corporate actions — no company-specific catalyst was found. The move was accompanied by volume 2.0x the 5-day average, suggesting elevated trader interest ahead of the earnings announcement scheduled for 2026-08-05.
Material / Earnings2026-07-29
MKS Inc. (MKSI) moved -8.00% from $280.01 to $257.61 on 2026-07-29. We checked news, earnings announcements, analyst updates, SEC filings, and corporate actions — no company-specific catalyst was found. The move coincided with volume 2.0x the 5-day average and marked a new 30-day low.
Material / Earnings2026-07-28
MKS Inc. (MKSI) moved -3.71% from $296.31 to $285.31 on 2026-07-28. We checked news, earnings announcements, analyst updates, filings, and corporate actions — no company-specific catalyst was found. The move coincided with volume 2.0x the 5-day average and brought the stock to a new 30-day low.
Material / Earnings2026-07-27
MKS Inc. (MKSI) moved -4.32% from $329.95 to $315.70 on 2026-07-27, reaching a new 30-day low. We checked news, earnings announcements, analyst updates, filings, and corporate actions — no company-specific catalyst was found. Volume was 1.6x the 5-day average, modestly elevated.
Material / Earnings2026-07-24
MKSI moved -4.10% from its $343.25 open to a $329.18 close on 2026-07-24.
Activity2026-07-22
MKS Inc. (MKSI) moved +4.26% from $330.74 to $344.84 on 2026-07-22. We checked news, earnings, analyst updates, SEC filings, and corporate actions — no company-specific catalyst was found. Volume remained near its 5-day average at 0.6x, suggesting the move occurred without unusual trading interest.
Upcoming catalysts & outlook
Next earnings
Unknown
Thesis shift
Neutral / Mixed
bullish signal
Risk level
High
from change events
Frequently asked questions about MKSI
Why did MKS Inc. (MKSI) stock move?
MKSI rose 4.7% to $304.99. No single company-specific catalyst was confirmed during the move window, and it looks technical.
How much did MKSI stock rise?
MKSI gained 4.70% ($13.68) versus the prior close of $291.31, last trading at $304.99.
How BestStocks tracks MKSI
This page is generated automatically by BestStocks' change-detection system after its price and volume cleared MKSI-specific materiality thresholds, triggering an evidence check. It draws on 19 tracked change events for MKSI, cross-checked against the data sources listed below. A live intraday quote was not available, so price and volume figures are the confirmed end-of-day close from August 7, 2026 — not the current price — and the percentage move is that session's. They refresh once live quotes resume. For companies with multiple share classes, market-cap figures can differ by data source. Analyst price targets and ratings are FMP consensus. This is an educational summary of what changed and why — not personalized investment advice.
