Ramakumar Mayampurath, the EVP & CFO of $MKSI, sold 8,810 shares of the company on 05-22-2026 for an estimated $2,779,378. We received data on the trade from a recent SEC filing. This was a sale of approximately 100.0% of their shares of this class of stock. Following this trade, they now own 1 shares of this class of $MKSI stock.
$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:
- JOHN TSENG-CHUNG LEE (President & CEO) has made 0 purchases and 5 sales selling 40,000 shares for an estimated $10,858,042.
- GERALD G COLELLA has made 0 purchases and 2 sales selling 20,000 shares for an estimated $5,068,674.
- RAMAKUMAR MAYAMPURATH (EVP & CFO) sold 8,810 shares for an estimated $2,779,378
- ERIC ROBERT TARANTO (EVP & GM, VSD) has made 0 purchases and 2 sales selling 6,020 shares for an estimated $1,366,941.
- KATHLEEN FLAHERTY BURKE (EVP, GC & Secretary) sold 4,254 shares for an estimated $1,063,500
- JAMES ALAN SCHREINER (EVP & COO) sold 4,100 shares for an estimated $1,045,500
- JACQUELINE F MOLONEY has made 0 purchases and 4 sales selling 3,569 shares for an estimated $1,036,707.
- PETER III CANNONE has made 0 purchases and 2 sales selling 2,600 shares for an estimated $732,164.
- JOHN EDWARD WILLIAMS (EVP & GM, PSD) sold 2,042 shares for an estimated $523,744
- DAVID PHILIP HENRY (EVP, Global Str Mktg & GM, MSD) sold 2,000 shares for an estimated $523,120
- MICHELLE M MCCARTHY (VP & Chief Accounting Officer) has made 0 purchases and 2 sales selling 1,466 shares for an estimated $366,502.
- ELIZABETH MORA has made 0 purchases and 2 sales selling 600 shares for an estimated $119,475.
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 348 institutional investors add shares of $MKSI stock to their portfolio, and 266 decrease their positions in their most recent quarter.
Here are some of the largest recent moves:
- ASPEX MANAGEMENT (HK) LTD added 1,538,789 shares (+inf%) to their portfolio in Q1 2026, for an estimated $353,629,100
- INVESCO LTD. added 1,472,145 shares (+61.8%) to their portfolio in Q4 2025, for an estimated $235,248,771
- WHALE ROCK CAPITAL MANAGEMENT LLC added 1,306,724 shares (+inf%) to their portfolio in Q1 2026, for an estimated $300,298,242
- CAPITAL WORLD INVESTORS added 1,277,200 shares (+inf%) to their portfolio in Q1 2026, for an estimated $293,513,332
- CAPITAL INTERNATIONAL INVESTORS removed 1,270,460 shares (-39.2%) from their portfolio in Q1 2026, for an estimated $291,964,412
- FMR LLC removed 1,264,492 shares (-39.5%) from their portfolio in Q1 2026, for an estimated $290,592,906
- PRICE T ROWE ASSOCIATES INC /MD/ removed 1,053,702 shares (-38.3%) from their portfolio in Q1 2026, for an estimated $242,151,256
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 Revenue
$MKSI had revenues of $1.1B in Q1 2026. This is an increase of 15.17% from the same period in the prior year.
You can track MKSI financials on Quiver Quantitative's MKSI stock page.
You can access data on MKSI stock through the Quiver Quantitative API.
$MKSI Analyst Ratings
Wall Street analysts have issued reports on $MKSI in the last several months. We have seen 4 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
- TD Cowen issued a "Buy" rating on 01/22/2026
- Morgan Stanley issued a "Overweight" rating on 01/22/2026
- Mizuho issued a "Outperform" rating on 12/17/2025
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 13 analysts offer price targets for $MKSI in the last 6 months, with a median target of $305.0.
Here are some recent targets:
- Joseph Moore from Morgan Stanley set a target price of $374.0 on 05/18/2026
- Joseph Quatrochi from Wells Fargo set a target price of $300.0 on 05/08/2026
- Peter Peng from JP Morgan set a target price of $365.0 on 05/08/2026
- Elizabeth Sun from Citigroup set a target price of $355.0 on 05/08/2026
- Steve Barger from Keybanc set a target price of $360.0 on 05/08/2026
- James Ricchiuti from Needham set a target price of $360.0 on 05/07/2026
- Matthew Prisco from Cantor Fitzgerald set a target price of $400.0 on 04/22/2026
This article is not financial advice. See Quiver Quantitative's disclaimers for more information.
