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Who owns MKS (MKSI) stock

707 funds reported MKS (MKSI) shares in their latest 13F filings, worth $29.2B in all. The largest holder is BlackRock ($3.1B). Last quarter 401 funds added to their stakes and 276 cut them. Members of Congress and other officials disclosed 1 trade (0 buys, 1 sales).

Largest holders of MKSI (13F)Largest holders of MKSI (13F)BlackRock$3.1BInvesco$2.1BVanguard Portfolio Management LLC$1.6BVanguard Capital Management LLC$1.4BVanguard Group$1.2BState Street$949MPoint72 Asset Management, L.P.$888MCapital International Investors$852MPrice T Rowe Associates$841MGeode Capital Management, LLC$687M

Largest holders (13F)

FundSharesValueChangeQuarter
BlackRock6,930,030$3.1Bincrease2026-06-30
Invesco4,661,664$2.1Bincrease2026-06-30
Vanguard Portfolio Management LLC3,707,327$1.6Bincrease2026-06-30
Vanguard Capital Management LLC3,049,560$1.4Bincrease2026-06-30
Vanguard Group7,487,305$1.2Bdecrease2025-12-31
State Street2,134,663$949Mincrease2026-06-30
Point72 Asset Management, L.P.1,996,843$888Mincrease2026-06-30
Capital International Investors1,915,187$852Mdecrease2026-06-30
Price T Rowe Associates1,889,901$841Mincrease2026-06-30
Geode Capital Management, LLC1,539,072$687Mdecrease2026-06-30
FMR LLC1,499,498$667Mdecrease2026-06-30
Wellington Management Group LLP1,416,034$630Mdecrease2026-06-30
Capital World Investors1,366,290$608Mincrease2026-06-30
Whale Rock Capital Management LLC1,271,373$566Mdecrease2026-06-30
Neuberger Berman Group LLC1,165,068$518Mdecrease2026-06-30

Trades by Congress and other officials

DateWhoTradeAmount
2025-10-31Lisa McClainsale$1K–$15K

MKS' latest quarter

MKS, Q3 2026: revenue $1.4B (+43% year over year), operating margin 23.1%, net earnings $237M, operating cash flow $292M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most MKSI stock?

By the latest 13F filings: BlackRock ($3.1B); Invesco ($2.1B); Vanguard Portfolio Management LLC ($1.6B); Vanguard Capital Management LLC ($1.4B); Vanguard Group ($1.2B).

Has Congress traded MKSI stock?

Officials disclosed 1 trade on file: 0 buys and 1 sales. The latest: Lisa McClain, sale on 2025-10-31.

What is the short interest in MKSI?

4,910,795 shares were sold short at the 2026-10-15 settlement, -3.45% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.