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MKS Instruments Inc (MKSI) — chart, structure and Closelook read

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Company snapshot — MKS Instruments Inc

MKSI in five paragraphs: what it makes and sells, where it sits in the Closelook stack, who it is priced against, why we track it, what we watch. Research diary, not advice.

What it does
MKS Instruments builds the subsystems that keep semiconductor fabs running: vacuum, pressure and flow control, gas delivery and gas-composition analysis in its Vacuum Solutions division; lasers, optics and precision motion control in its Photonics division; and surface finishing and plating chemistry in its Material Solutions division. Customers are chip makers, equipment builders and packaging houses. It is based in Andover, Massachusetts, and recently renamed itself MKS Inc.
Where it sits in the stack
In our Rubin Build-Out 100 index, MKS sits in Layer 6, Manufacturing Support, within the Fab Subsystems & Process Infra sleeve — vacuum, gas-delivery and ultra-high-purity fluid systems that the headline lithography and etch tools depend on to function. It is a supplier those tools cannot run without, rather than a maker of a finished tool itself.
Who it is priced against
Closelook's peer group for this sleeve places it with Axcelis Technologies, Advanced Energy Industries, Ebara and Horiba; the market also names Entegris as a comparable supplier of fab-critical materials and delivery systems.
Why Closelook tracks it
MKS is a Rubin constituent and carries a Closelook score, where cash quality reads strongest and momentum weakest. The diary has flagged it twice: the Morning 10 grouped it among amber-flagged support tests, and the Daily Pulse named it as a selective add in the equipment and process-control layer even while trimming larger names.
What the diary watches
The diary watches whether orders for vacuum and gas-delivery subsystems track the pace of new fab tool installs, since this layer moves with tool capex rather than chip volume alone.

MKS Instruments Inc (MKSI) trades on US exchanges, classified under Technology, and sits in Layer 6 of the build-out stack. Constituent of Rubin Build-Out 100.

The Closelook company score reads 46/100 composite (momentum 32, quality 50, valuation 42) across 7 modules — the full breakdown, chart structure and analog history load live above.

Written from the company’s public profile and Closelook’s own readings, 2026-09-17. Descriptive, refreshed with the registry; corrections welcome via the imprint. closelook.net is an investment research diary — market structure, index membership and scores are our own readings, not investment advice. Related: index compare · sector dispersion · scanner.

Signals for this name

Every Closelook reading that exists for MKSI, from the same nightly bakes the boards use. Research diary readings, not advice.

The Street on this name 2 analyst actions on the wire · latest: price target by Morgan Stanley, 2026-09-17

The Street on this name

Analyst actions and the latest print for MKSI from the Closelook wires — third-party opinions on the record, not our readings.

  • Price target Morgan Stanley — target 345 from 439 Target cut to $345 from $439 (+46.6% to spot) 2026-09-17
  • Price target Mizuho — target 330 from 360 Target cut to $330 from $360 (+22.6% to spot) 2026-08-25

2 actions on the analyst wire since 2026-08-13: 2 target changes. Analyst wire → · Earnings wire →

Who it is priced against Rubin Build-Out 100 · Fab Subsystems & Process Infra · 4 names with week and year-to-date

Peer group

Rubin Build-Out 100 · Fab Subsystems & Process Infra

Vacuum, gas-delivery, and ultra-high-purity fluids. The fab plumbing without which the headline tools are paperweights.

Compared against MKSI on the nightly bakes; the Peers tab ranks the cohort on the Closelook scores where it exists.

Versus its index Rubin Build-Out 100 — the name, its sleeve and the index over day, week and month

Versus its index

The name against its Closelook index and its own sleeve — equal-weight, nightly closes.

Rubin Build-Out 100 · as of 2026-09-17

DayWeekMonth3 months
MKSI+2.1%−8.3%−20.0%−35.3%
Fab Subsystems & Process Infra+0.7%−5.7%−11.9%—
Rubin Build-Out 100+1.5%−2.2%−2.9%—

Against the index: 6.1 pts behind on the week, 17.1 pts behind on the month; against its Fab Subsystems & Process Infra sleeve 8.1 pts behind on the month.

Returns from the index workers’ nightly closes; equal-weight sleeves. A relative reading from the research diary, not advice.

Weather around the name 4 macro readings: Money Temperature, Factor regime, Sector × region …

The weather around this name

Macro readings that apply by membership — the regime, the factor tape, the sector cell, the funding backdrop.

  • Money Temperature Composite 55/100 · S&P 500 fund at 58, above its 50- and 200-day averagesEight instruments scored on position, momentum, volume, volatility and fragility — the regime every name trades inside. Temperature lab → 2026-09-17
  • Factor regime Momentum leading — risk appetite buildingMomentum against low volatility (SPMO / SPLV): above its 50-day trend, 94th percentile of the window, +2.7% over 20 sessions. Factor regime → 2026-09-17
  • Sector × region Technology in US: −2.1% week · −3.4% month · −1.2% quarter · +32.1% yearThe Sector Engine cell this name lives in, from XLK.US; the 11 × 4 matrix shows where its sector is being bought and where it is being sold. Sector Engine → 2026-09-16
  • Sovereign pressure Index 0.00 · down 0.41 over 21 sessionsG7 long-end yields, 10s30s and the slope — the funding weather for every balance sheet on this site. Sovereign pressure → 2026-09-17

FAQ · from the current data · as of 2026-09-18

Quick answers

What is MKS Instruments Inc (MKSI)?

MKS Instruments Inc trades as MKSI on the US exchange (US) and is classified under Technology in the Closelook research universe, as of the registry build of 2026-09-18.

Is MKSI in a Closelook index?

Yes — MKS Instruments Inc is a constituent of Rubin Build-Out 100, as of 2026-09-18.

What is MKS Instruments Inc's Closelook composite score?

46 out of 100, with momentum 32, quality 50 and valuation 42 sub-scores, as of 2026-09-18. Scores are Closelook's own research readings, not ratings or investment advice.

Where does MKSI trade against its moving averages?

Stochastic turned up: Its stochastic crossed up out of oversold (%K 15.5 over %D 15.3) today — a short-term momentum-turn signal. As of 2026-09-17 — a technical state from the nightly Closelook bake, not advice. The Technical tab carries the full row.

How is MKSI doing against its Closelook index?

Over the past month MKS Instruments Inc is −20.0% against −2.9% for the Rubin Build-Out 100 — 17.1 points behind its index, as of 2026-09-17. Its Fab Subsystems & Process Infra sleeve is −11.9% over the same month. The “Versus its index” table on this page carries the day, the week and the month for the name, its sleeve and the index.

What does MKS Instruments Inc do?

MKS Instruments builds the subsystems that keep semiconductor fabs running: vacuum, pressure and flow control, gas delivery and gas-composition analysis in its Vacuum Solutions division; lasers, optics and precision motion control in its Photonics division; and surface finishing and plating chemistry in its Material Solutions division. Customers are chip makers, equipment builders and packaging houses. It is based in Andover, Massachusetts, and recently renamed itself MKS Inc. Closelook's peer group for this sleeve places it with Axcelis Technologies, Advanced Energy Industries, Ebara and Horiba; the market also names Entegris as a comparable supplier of fab-critical materials and delivery systems.

Where does MKS Instruments Inc sit in the AI build-out?

In our Rubin Build-Out 100 index, MKS sits in Layer 6, Manufacturing Support, within the Fab Subsystems & Process Infra sleeve — vacuum, gas-delivery and ultra-high-purity fluid systems that the headline lithography and etch tools depend on to function. It is a supplier those tools cannot run without, rather than a maker of a finished tool itself. MKS is a Rubin constituent and carries a Closelook score, where cash quality reads strongest and momentum weakest. The diary has flagged it twice: the Morning 10 grouped it among amber-flagged support tests, and the Daily Pulse named it as a selective add in the equipment and process-control layer even while trimming larger names.

What has Wall Street done on MKS Instruments Inc recently?

The most recent analyst action on MKS Instruments Inc on the Closelook wire is a price target by Morgan Stanley on 2026-09-17 (target 345 from 439). 2 actions on the analyst wire since 2026-08-13: 2 target changes. Analyst actions are third-party opinions recorded by the wire, not Closelook readings. The “The Street on this name” block on this page lists the moves; the full feeds are the analyst wire and the earnings wire.

Where has Closelook written about MKS Instruments Inc?

MKS Instruments Inc appears in 2 Closelook pieces, most recently Morning 10: The counter-test gets paid — CoreWeave +16% overnight as Seoul melts up into CPI (2026-08-12); Daily Pulse: Step One: Trimming the Infra-AI Side (2026-06-27). What Closelook said most recently: The scanner's clustered support tests (Horiba 6856 and Teradyne green-flagged; FMX, MKSI, Lasertec 6920 amber) resolve on the same whistle. (Morning 10, 2026-08-12). The "Mentioned on Closelook" block on this page lists the long reads, the reference entries and the dailies that name it.

What does this page show?

A live price chart with SMA overlays and drawing tools for MKSI, performance metrics, index-membership context and the Closelook structure read — an investment research diary view, not investment advice.

Mentioned on Closelook 2 pieces · newest: Morning 10, “The counter-test gets paid — CoreWeave +16% overnight as Seoul melts up into CPI” (2026-08-12)

Mentioned on Closelook

Where MKSI appears in the diary — 2 pieces, newest first. Every link is our own writing.

Dailies

Related in the Closelook universe