MKS Inc. (MKSI) is down 9.1% today. Here is some analysis on what might have caused this price movement.
Analysis: The selloff appears to be driven mainly by broad weakness in semiconductor and semiconductor-equipment stocks rather than a new company-specific setback today. MKS had just disclosed a $650 million all-cash agreement to sell its Ophir Optics business, a move framed as balance-sheet strengthening, so the market’s reaction looks more like sector pressure and risk-off trading than a direct response to negative operating news. ([sec.gov](https://www.sec.gov/Archives/edgar/data/1049502/000119312526424709/mksi-20261019.htm))
Details:
Sources:
SEC, MKS Inc., AP News
Disclaimer: This price movement analysis was generated with the help of AI. Please double-check the information provided for mistakes.
$MKSI Insider Trading Activity
$MKSI insiders have traded $MKSI stock on the open market 24 times in the past 6 months. Of those trades, 0 have been purchases and 24 have been sales.
Here’s a breakdown of recent trading of $MKSI stock by insiders over the last 6 months:
- GERALD G COLELLA has made 0 purchases and 7 sales selling 20,000 shares for an estimated $6,668,075.
- JOHN TSENG-CHUNG LEE (President & CEO) has made 0 purchases and 2 sales selling 20,000 shares for an estimated $6,174,900.
- RAMAKUMAR MAYAMPURATH (EVP & CFO) sold 8,810 shares for an estimated $2,779,378
- DAVID PHILIP HENRY (EVP, Global Str Mktg & GM, MSD) has made 0 purchases and 2 sales selling 8,500 shares for an estimated $2,712,833.
- JAMES ALAN SCHREINER (EVP & COO) has made 0 purchases and 4 sales selling 4,281 shares for an estimated $1,458,275.
- MICHELLE M MCCARTHY (SVP & Chief Accounting Officer) sold 2,434 shares for an estimated $767,269
- JACQUELINE F MOLONEY has made 0 purchases and 2 sales selling 2,400 shares for an estimated $758,782.
- JOSEPH B DONAHUE sold 2,100 shares for an estimated $688,703
- PETER III CANNONE sold 1,350 shares for an estimated $409,590
- ELIZABETH MORA has made 0 purchases and 2 sales selling 600 shares for an estimated $170,694.
- JOHN EDWARD WILLIAMS (EVP & GM, PSD) sold 457 shares for an estimated $131,757
To track insider transactions, check out Quiver Quantitative's insider trading dashboard. You can access data on insider stock transactions through the Quiver Quantitative API insider transaction endpoint.
$MKSI Hedge Fund Activity
We have seen 421 institutional investors add shares of $MKSI stock to their portfolio, and 315 decrease their positions in their most recent quarter.
Here are some of the largest recent moves:
- JPMORGAN CHASE & CO added 3,373,844 shares (+inf%) to their portfolio in Q2 2026, for an estimated $1,500,685,811
- VICTORY CAPITAL MANAGEMENT INC removed 1,953,372 shares (-76.2%) from their portfolio in Q2 2026, for an estimated $868,859,865
- ALKEON CAPITAL MANAGEMENT LLC added 1,072,040 shares (+inf%) to their portfolio in Q2 2026, for an estimated $476,843,392
- INVESCO LTD. added 940,205 shares (+25.3%) to their portfolio in Q2 2026, for an estimated $418,203,184
- SACHEM HEAD CAPITAL MANAGEMENT LP added 812,700 shares (+inf%) to their portfolio in Q2 2026, for an estimated $361,488,960
- SIXTH STREET PARTNERS MANAGEMENT COMPANY, L.P. added 808,198 shares (+inf%) to their portfolio in Q2 2026, for an estimated $359,486,470
- QUBE RESEARCH & TECHNOLOGIES LTD added 531,708 shares (+715.0%) to their portfolio in Q2 2026, for an estimated $236,503,718
To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard. You can access data on hedge funds moves and 13F filings through the Quiver Quantitative API 13F endpoint.
$MKSI Analyst Ratings
Wall Street analysts have issued reports on $MKSI in the last several months. We have seen 1 firms issue buy ratings on the stock, and 0 firms issue sell ratings.
Here are some recent analyst ratings:
- Needham issued a "Buy" rating on 05/07/2026
To track analyst ratings and price targets for $MKSI, check out Quiver Quantitative's $MKSI forecast page.
$MKSI Price Targets
Multiple analysts have issued price targets for $MKSI recently. We have seen 10 analysts offer price targets for $MKSI in the last 6 months, with a median target of $428.5.
Here are some recent targets:
- Vijay Rakesh from Mizuho set a target price of $415.0 on 07/09/2026
- Joseph Moore from Morgan Stanley set a target price of $442.0 on 07/06/2026
- Bhavesh Lodaya from BMO Capital set a target price of $453.0 on 06/30/2026
- Steve Barger from Keybanc set a target price of $475.0 on 06/29/2026
- C.J. Muse from Cantor Fitzgerald set a target price of $600.0 on 06/29/2026
- Vivek Arya from B of A Securities set a target price of $500.0 on 06/23/2026
- Joseph Quatrochi from Wells Fargo set a target price of $300.0 on 05/08/2026
This article is not financial advice. See Quiver Quantitative's disclaimers for more information. Note that there may be inaccuracies due to mistakes in ticker-mapping, and other anomalies.
