§ SEMICONDUCTORS
USD · SemiconductorsMKSI
MKS INC
USDSector · SemiconductorsBeta · 1.95
§ 01 · PRICE
Price action
1D5D1M6MYTD1YMAX
OPEN 265.57HIGH 275.48LOW 262.7752W 54.84 — 269.91
§ 03 · SIGNAL STACK · WHAT THE INPUTS SAY
13F FLOW
470 increased/new, 256 decreased/exited (13F)
AC 13F Analysis
§ 04 · FUNDAMENTALS · THE BOOKS
| P/E | 53.5 | P/B | 3.95 |
| EPS (TTM) | 4.36 | Dividend | 0.45% |
§ 05 · WHO OWNS IT
Top institutional holders
| Fund | Shares | % port | Δ Q/Q |
|---|---|---|---|
| BlackRock, Inc. | 6.6M | 0.0% | +8% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 3.7M | n/a | n/a |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.0M | n/a | n/a |
| State Street | 2.1M | 0.0% | +2% |
| Capital International Investors | 2.0M | 0.1% | −39% |
| Fidelity Management | 1.9M | 0.0% | −40% |
◇ AC INTELLIGENCE
Top institutional owners for MKSI as of the most recent 13F reporting period (Q1 2026 · Period ended Mar 31). Δ Q/Q reflects share-count change vs. the prior filing — positive green means adding, negative red means trimming. Cross-reference with the ownership-mix bars below to see which strategy cohort is driving the flow.
§ 06 · WHO OWNS IT · BY STRATEGY
OTHER51.4% · 484 holders
PASSIVE / INDEX19.9% · 12 holders
QUALITY / COMPOUNDER16.4% · 26 holders
DEALER / BANK14.7% · 44 holders
TACTICAL / MACRO3.7% · 5 holders
INCOME / DEFENSIVE2.9% · 28 holders
SYSTEMATIC / QUANT1.7% · 16 holders
ACTIVIST0.2% · 1 holder
DEEP VALUE0.0% · 1 holder
GROWTH / MOMENTUM0.0% · 1 holder
◇ AC INTELLIGENCE
Ownership mix by behavioral cohort. Top bars indicate which style of capital dominates the float — passive indexing, quality compounders, dealer/bank, systematic quant, etc. Big quality-compounder share means concentrated active conviction; heavy passive share means flows are dictated by index rebalances, not fundamentals.
§ 07 · INSIDER ACTIVITY · LAST 180 DAYS
NO INSIDER FILINGS
◇ AC INTELLIGENCE
No Form 4 filings on record for MKSI in the last 180 days.
§ 08 · COVERAGE · OUR RECENT NOTES
No notes mention MKSI yet.