On August 6, MKS Instruments fell 7.67% in regular trading, trading at approximately $297.64/share, with turnover of $62.35 million.

On the news front, the company released its Q2 earnings after market close, reporting adjusted EPS of $3.30, beating the consensus estimate of $2.96 by 11.5% and representing an 86.44% year-over-year increase. Revenue came in at $1.248 billion, surpassing the $1.206 billion estimate, up 28.4% year-over-year. The company also guided Q3 adjusted EPS of $3.58 (plus or minus $0.31) on revenue of $1.35 billion, both well above analyst projections of $3.21 EPS and $1.25 billion revenue.

Despite the double beat on results and guidance, shares had rallied aggressively ahead of the report, with a single-day gain exceeding 5% on August 4 driven by Morgan Stanley raising its price target from $374 to $442. The substantial short-term cumulative gains triggered concentrated profit-taking. Meanwhile, the broader semiconductor equipment sector was under pressure, with Applied Materials down 1.47%, Lam Research down 1.26%, and KLA Corporation down 1.0%, amplifying selling momentum.

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