MKSI
MKS INCData as of 2026 Q1 (03-31) · 13F snapshot
Summary
MKS INC (MKSI) is held by 8 tracked hedge-fund managers, a combined reported value of ~$905.96M; the largest are Steven Cohen, Ken Griffin, Izzy Englander. This quarter: 2 new, 3 added, 1 trimmed. 8 members of Congress have disclosed STOCK Act trades. Data as of 2026 Q1, from public SEC 13F filings, delayed up to ~45 days.
Attention · HighThis quarter · Heating up
Gurus holding8
Congress trades8
Price$324.69vs quarter-end+41.29%
Sectors0
This quarter's moves
Top holderSteven CohenNew2
Added3
Trimmed / sold1
Steven CohenAdd
Value $370.07M0.7% of portfolio1,610,3312026 Q1
George SorosAdd
Value $14.65M0.4% of portfolio134,7702024 Q3
Value $12.80M— of portfolio55,7002026 Q1
Value $7.15M— of portfolio31,1002026 Q1
Value $252.8K— of portfolio1,1002026 Q1
| Investor | Value | % of portfolio | Action |
|---|---|---|---|
| Steven Cohen | $370.07M | 0.7% | Add |
| George Soros | $14.65M | 0.4% | Add |
| Ken GriffinPUT | $12.80M | — | — |
| Ken GriffinCALL | $7.15M | — | — |
| Steven CohenPUT | $252.8K | — | — |
Data from public SEC 13F & STOCK Act filings, delayed up to ~45 days, partial holdings only — for research, not investment advice.