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Equibles

MKSI

Mks Inc

Company with tickers: MKSI

CIK
1049502
CUSIP
55306N104
Shares Outstanding
67,544,129
13F Activity (30d)
348 filings 345 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 617
Total Value: $16,384,810,451
Total Shares: 71,297,206
Showing 1–100 of 636 holdings by value · page 1 of 7

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 617 13F filers · Δ vs Dec 31, 2025
Top Holder
9.3%
Jun 2023 → Mar 2026 · range 9.3% – 12.0%
−1.0 pts
Top 5
26.9%
Jun 2023 → Mar 2026 · range 26.9% – 44.2%
−6.0 pts
Top 10
40.2%
Jun 2023 → Mar 2026 · range 40.2% – 61.8%
−8.4 pts
HHI
257
Jun 2023 → Mar 2026 · range 257 – 516
Broadly held −79

Quarterly Activity

vs Dec 31, 2025
New
164
Increased
201
Decreased
193
Sold Out
61
Unchanged
59
Holder count: +103
Institutional value: +40.8%
Shares held: -2.1%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Large Point72 Asset Management, L.P. +985,632 1,611,431
Mega JPMORGAN CHASE & CO +544,899 2,096,342
Mega BlackRock, Inc. +502,891 6,641,730
Mega CITADEL ADVISORS LLC +487,359 1,033,832
Mega AQR CAPITAL MANAGEMENT LLC +419,835 616,497

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega VICTORY CAPITAL MANAGEMENT INC −1,683,641 878,758
Mega Capital International Investors −1,270,460 1,968,770
Mega FMR LLC −1,264,492 1,933,843
Mega PRICE T ROWE ASSOCIATES INC /MD/ −1,053,702 1,700,148
Mid COOKE & BIELER LP −756,655 210,048

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 3,685,493 $846,963,146
Mega VANGUARD CAPITAL MANAGEMENT LLC 3,014,201 $692,693,531
Mid Aspex Management (HK) Ltd 1,538,789 $353,629,100
Mid Whale Rock Capital Management LLC 1,306,724 $300,298,242
Mega Capital World Investors 1,277,200 $293,513,332

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 7,487,305 $1,196,471,337
Mega NORGES BANK 922,737 $147,453,372
Mid Southpoint Capital Advisors LP 600,000 $95,880,000
Mid GLENVIEW CAPITAL MANAGEMENT, LLC 74,200 $11,857,160
Large BANK OF NOVA SCOTIA 72,250 $11,545,550
Filter: New 164 Increased 201 Reduced 193 Sold out 61 Unchanged 59
Showing 100 of 636
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $1,526,335,963 9.32% 6,641,730
Mega Invesco Ltd. $855,228,485 5.22% 3,721,459
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $846,963,146 5.17% 3,685,493
Mega VANGUARD CAPITAL MANAGEMENT LLC $692,693,531 4.23% 3,014,201
Mega JPMORGAN CHASE & CO $481,760,350 2.94% 2,096,342
Mega STATE STREET CORP $472,887,390 2.89% 2,057,732
Mega Capital International Investors $452,443,033 2.76% 1,968,770
Mega FMR LLC $444,416,458 2.71% 1,933,843
Mega WELLINGTON MANAGEMENT GROUP LLP $421,273,210 2.57% 1,833,137
Mega PRICE T ROWE ASSOCIATES INC /MD/ $390,711,011 2.38% 1,700,148
Large Point72 Asset Management, L.P. $370,070,167 2.26% 1,610,331
Mega GEODE CAPITAL MANAGEMENT, LLC $353,750,898 2.16% 1,539,319
Mid Aspex Management (HK) Ltd $353,629,100 2.16% 1,538,789
Mega NEUBERGER BERMAN GROUP LLC $329,439,299 2.01% 1,433,529
Mid Whale Rock Capital Management LLC $300,298,242 1.83% 1,306,724
Mega Capital World Investors $293,513,332 1.79% 1,277,200
Large WESTFIELD CAPITAL MANAGEMENT CO LP $240,556,605 1.47% 1,046,763
Mega CITADEL ADVISORS LLC $217,637,423 1.33% 947,032
Mega UBS Group AG $208,502,016 1.27% 907,280
Mega MILLENNIUM MANAGEMENT LLC $205,534,939 1.25% 894,369
Mega VICTORY CAPITAL MANAGEMENT INC $201,947,375 1.23% 878,758
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $199,164,147 1.22% 866,647
Mega DIMENSIONAL FUND ADVISORS LP $191,970,632 1.17% 835,345
Mega Bank of New York Mellon Corp Bank $191,236,380 1.17% 832,150
Mega AQR CAPITAL MANAGEMENT LLC $141,677,169 0.86% 616,497
Mega PRINCIPAL FINANCIAL GROUP INC $141,156,195 0.86% 614,230
Mega NORTHERN TRUST CORP Bank $130,813,364 0.80% 569,224
Mega JANE STREET GROUP, LLC $124,143,362 0.76% 540,200
Mega MORGAN STANLEY $118,366,618 0.72% 515,063
Mid SAMLYN CAPITAL, LLC $114,143,178 0.70% 496,685
Mega FRANKLIN RESOURCES INC $109,364,968 0.67% 475,893
Mega BANK OF AMERICA CORP /DE/ Bank $106,564,963 0.65% 463,709
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $105,781,543 0.65% 460,300
Small FengHe Fund Management Pte. Ltd. $104,868,967 0.64% 456,329
Mega UBS Group AG $99,307,793 0.61% 432,130
Mega VANGUARD FIDUCIARY TRUST CO Bank $95,856,968 0.59% 417,114
Large Balyasny Asset Management L.P. $93,623,444 0.57% 407,395
Mid ROYCE & ASSOCIATES LP $92,767,402 0.57% 403,670
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $91,997,309 0.56% 400,319
Mega Nuveen, LLC $86,904,488 0.53% 378,158
Small Blue Grotto Capital, LLC $86,178,750 0.53% 375,000
Mid Contour Asset Management LLC $86,148,414 0.53% 374,868
Mid Madison Asset Management, LLC $77,752,996 0.47% 338,336
Mega RAYMOND JAMES FINANCIAL INC $77,667,043 0.47% 337,962
Mid TREMBLANT CAPITAL GROUP $75,788,120 0.46% 329,786
Mega NORDEA INVESTMENT MANAGEMENT AB $74,988,839 0.46% 326,308
Mega ALLIANCEBERNSTEIN L.P. $73,521,045 0.45% 319,921
Mid TimesSquare Capital Management, LLC $66,223,198 0.40% 288,165
Mid SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC $64,853,760 0.40% 282,206
Mega AMERICAN CENTURY COMPANIES INC $64,568,566 0.39% 280,965
Mega TWO SIGMA INVESTMENTS, LP $64,045,059 0.39% 278,687
Large NOMURA HOLDINGS INC $61,900,702 0.38% 269,356
Large Quantinno Capital Management LP $59,692,917 0.36% 259,749
Mega Amundi $58,543,636 0.36% 254,748
Mid Defiance ETFs, LLC Mutual Fund $57,594,062 0.35% 250,616
Mid Penserra Capital Management LLC $57,594,062 0.35% 250,616
Mid Park West Asset Management LLC $57,277,844 0.35% 249,240
Mega GOLDMAN SACHS GROUP INC $56,447,309 0.34% 245,626
Small VALUE HOLDINGS MANAGEMENT CO. LLC $56,314,940 0.34% 245,050
Mid Harvey Partners, LLC $55,934,834 0.34% 243,396
Mega JANE STREET GROUP, LLC $55,901,971 0.34% 243,253
Mega WELLS FARGO & COMPANY/MN $55,852,560 0.34% 243,038
Mid SYSTEMATIC FINANCIAL MANAGEMENT LP $55,628,497 0.34% 242,063
Large NATIXIS ADVISORS, LLC $53,317,298 0.33% 232,006
Large JONES FINANCIAL COMPANIES LLLP $51,427,340 0.31% 223,782
Mid DENDUR CAPITAL LP $49,294,245 0.30% 214,500
Mid COOKE & BIELER LP $48,271,130 0.29% 210,048
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $46,862,852 0.29% 203,920
Large Gotham Asset Management, LLC $44,905,563 0.27% 195,403
Large Handelsbanken Fonder AB $44,238,425 0.27% 192,500
Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. $42,745,809 0.26% 186,005
Mega RHUMBLINE ADVISERS $41,356,607 0.25% 179,960
Mid Mizuho Markets Cayman LP $40,216,750 0.25% 175,000
Mega LPL Financial LLC $40,211,004 0.25% 174,975
Mid Ceredex Value Advisors LLC $38,947,049 0.24% 169,475
Large VOLORIDGE INVESTMENT MANAGEMENT, LLC $38,163,627 0.23% 166,066
Mid SORA INVESTORS LLC $37,404,335 0.23% 162,762
Mega BARCLAYS PLC $37,114,084 0.23% 161,499
Mid FRONTIER CAPITAL MANAGEMENT CO LLC $37,056,862 0.23% 161,250
Mid SummitTX Capital, L.P. $36,978,497 0.23% 160,909
Large Retirement Systems of Alabama Pension $36,412,475 0.22% 158,446
Mega ROYAL BANK OF CANADA Bank $35,161,616 0.21% 153,003
Mid Delta Global Management LP $34,728,197 0.21% 151,117
Mega BNP PARIBAS ARBITRAGE, SA $34,172,057 0.21% 148,697
Mid CRAMER ROSENTHAL MCGLYNN LLC $34,100,356 0.21% 148,385
Large Thrivent Financial for Lutherans $33,018,410 0.20% 143,677
Mid Polaris Capital Management, LLC $30,955,407 0.19% 134,700
Mega DEUTSCHE BANK AG\ Bank $30,576,219 0.19% 133,050
Mega Swiss National Bank Bank $30,541,749 0.19% 132,900
Large LOOMIS SAYLES & CO L P $29,215,975 0.18% 127,131
Mega California Public Employees Retirement System Pension $28,332,815 0.17% 123,288
Small LIGHT STREET CAPITAL MANAGEMENT, LLC $28,097,489 0.17% 122,264
Mega D. E. Shaw & Co., Inc. $27,616,956 0.17% 120,173
Mid NEEDHAM INVESTMENT MANAGEMENT LLC $27,577,199 0.17% 120,000
Large BESSEMER GROUP INC $27,083,332 0.17% 117,851
Mega BANK OF MONTREAL /CAN/ Bank $26,918,101 0.16% 117,132
Small Talos Eurisko Asset Management LP $26,200,867 0.16% 114,011
Large SG Americas Securities, LLC Broker-Dealer $25,357,924 0.15% 110,343
Large Daiwa Securities Group Inc. Broker-Dealer $24,659,532 0.15% 107,304
Large RENAISSANCE TECHNOLOGIES LLC $23,809,005 0.15% 103,603

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