Stock Ownership/MKSI

MKS INC. (MKSI): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in MKSI · Information Technology. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
36
13F filers
Aggregate Value
$4.4B
Across holders
Last Price
$269.06
2026-08-24
Sector
Information Technology
GICS
Quarterly fund activity17 increased19 reduced3 exited
Full exits: Verition Fund Management LLC, MOORE CAPITAL MANAGEMENT, LP, TUDOR INVESTMENT CORP ET AL
Institutional Holders of MKSI
↗
36 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
Point72 Asset Management, L.P.
CIK 0001603466
Hedge Fund2.00M$888.2M20.0%1.0%Added+$887.7MQ2 2026
Aspex Management (HK) Ltd
CIK 0001768375
Hedge Fund1.82M$809.7M18.2%9.1%Added+$125.3MQ2 2026
Whale Rock Capital Management LLC
CIK 0001387322
Hedge Fund1.27M$565.5M12.7%4.5%Reduced$-15.7MQ2 2026
Sachem Head Capital Management LP
CIK 0001582090
Hedge Fund813K$361.5M8.1%7.5%Added—Q2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund698K$310.3M7.0%0.0%Reduced+$260.8MQ2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund645K$286.9M6.5%0.1%Reduced$-110.9MQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund638K$280.2M6.3%0.1%Added+$280.0MQ2 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund606K$269.6M6.1%0.3%Added+$236.5MQ2 2026
BALYASNY ASSET MANAGEMENT LLC
CIK 0001218710
Hedge Fund260K$115.7M2.6%0.1%Reduced+$115.7MQ2 2026
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund225K$100.1M2.3%0.1%Added$-31.6MQ2 2026
Point72 Asset Management, L.P.Added
Hedge Fund
$888.2M· 20.0% of total· 1.0% port· 2.00M sh· +$887.7M QoQ· Q2 2026
Aspex Management (HK) LtdAdded
Hedge Fund
$809.7M· 18.2% of total· 9.1% port· 1.82M sh· +$125.3M QoQ· Q2 2026
Whale Rock Capital Management LLCReduced
Hedge Fund
$565.5M· 12.7% of total· 4.5% port· 1.27M sh· $-15.7M QoQ· Q2 2026
Sachem Head Capital Management LPAdded
Hedge Fund
$361.5M· 8.1% of total· 7.5% port· 813K sh· — QoQ· Q2 2026
CITADEL ADVISORS LLCReduced
Hedge Fund
$310.3M· 7.0% of total· 0.0% port· 698K sh· +$260.8M QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCReduced
Hedge Fund
$286.9M· 6.5% of total· 0.1% port· 645K sh· $-110.9M QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$280.2M· 6.3% of total· 0.1% port· 638K sh· +$280.0M QoQ· Q2 2026
Qube Research & Technologies LtdAdded
Hedge Fund
$269.6M· 6.1% of total· 0.3% port· 606K sh· +$236.5M QoQ· Q2 2026
BALYASNY ASSET MANAGEMENT LLCReduced
Hedge Fund
$115.7M· 2.6% of total· 0.1% port· 260K sh· +$115.7M QoQ· Q2 2026
MARSHALL WACE, LLPAdded
Hedge Fund
$100.1M· 2.3% of total· 0.1% port· 225K sh· $-31.6M QoQ· Q2 2026
Gotham Asset Management, LLCReduced
Hedge Fund
$75.7M· 1.7% of total· 0.2% port· 170K sh· $-11.2M QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPReduced
Hedge Fund
$63.8M· 1.4% of total· 0.0% port· 143K sh· $-60.2M QoQ· Q2 2026
Rockefeller Capital Management L.P.Added
Hedge Fund
$60.2M· 1.4% of total· 0.1% port· 135K sh· +$58.5M QoQ· Q2 2026
LIGHT STREET CAPITAL MANAGEMENT, LLCReduced
Hedge Fund
$46.2M· 1.0% of total· 5.1% port· 104K sh· $-8.2M QoQ· Q2 2026
GLENVIEW CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$43.8M· 1.0% of total· 0.8% port· 99K sh· — QoQ· Q2 2026
Squarepoint Ops LLCAdded
Hedge Fund
$30.2M· 0.7% of total· 0.0% port· 68K sh· +$28.3M QoQ· Q2 2026
ExodusPoint Capital Management, LPAdded
Hedge Fund
$29.2M· 0.7% of total· 0.2% port· 66K sh· — QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$25.9M· 0.6% of total· 0.2% port· 58K sh· +$18.6M QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCReduced
Hedge Fund
$18.0M· 0.4% of total· 0.0% port· 40K sh· $-28.1M QoQ· Q2 2026
Walleye Capital LLCReduced
Hedge Fund
$12.3M· 0.3% of total· 0.0% port· 28K sh· +$11.6M QoQ· Q2 2026
Bridgewater Associates, LPReduced
Hedge Fund
$12.1M· 0.3% of total· 0.0% port· 27K sh· $-4.9M QoQ· Q2 2026
Schonfeld Strategic Advisors LLCAdded
Hedge Fund
$11.8M· 0.3% of total· 0.0% port· 26K sh· — QoQ· Q2 2026
VOLORIDGE INVESTMENT MANAGEMENT, LLCReduced
Hedge Fund
$5.8M· 0.1% of total· 0.0% port· 13K sh· $-68.1M QoQ· Q2 2026
Holocene Advisors, LPAdded
Hedge Fund
$3.2M· 0.1% of total· 0.0% port· 7K sh· — QoQ· Q2 2026
Man Group plcReduced
Hedge Fund
$3.2M· 0.1% of total· 0.0% port· 7K sh· $-6.9M QoQ· Q2 2026
CAXTON ASSOCIATES LLPReduced
Hedge Fund
$2.7M· 0.1% of total· 0.1% port· 6K sh· $-860K QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$1.9M· 0.0% of total· 0.0% port· 4K sh· +$29K QoQ· Q2 2026
Hudson Bay Capital Management LPAdded
Hedge Fund
$1.9M· 0.0% of total· 0.0% port· 4K sh· — QoQ· Q2 2026
Lighthouse Investment Partners, LLCReduced
Hedge Fund
$1.2M· 0.0% of total· 0.0% port· 3K sh· $-9.7M QoQ· Q2 2026
MAVERICK CAPITAL LTDReduced
Hedge Fund
$912K· 0.0% of total· 0.0% port· 2K sh· $-2.3M QoQ· Q2 2026
Woodline Partners LPAdded
Hedge Fund
$749K· 0.0% of total· 0.0% port· 2K sh· — QoQ· Q2 2026
Fulcrum Asset Management LLPAdded
Hedge Fund
$490K· 0.0% of total· 0.0% port· 1K sh· — QoQ· Q2 2026
JUPITER ASSET MANAGEMENT LTDAdded
Hedge Fund
$362K· 0.0% of total· 0.0% port· 813 sh· — QoQ· Q2 2026
GAMCO INVESTORS, INC. ET ALReduced
Institutional Manager
$318K· 0.0% of total· 0.0% port· 715 sh· $-1.4M QoQ· Q2 2026
CAPSTONE INVESTMENT ADVISORS, LLCReduced
Hedge Fund
$279K· 0.0% of total· 0.0% port· 628 sh· $-5.5M QoQ· Q2 2026
Ancora Advisors, LLCReduced
Hedge Fund
$36K· 0.0% of total· 0.0% port· 82 sh· $-8K QoQ· Q2 2026
1–10 of 36
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