MKS INSTRUMENTS INC (MKSI) Institutional Shareholders
MKS INSTRUMENTS INC (MKSI) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $14.46B in MKSI holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of MKSI tracked by InsiderSet, reporting ownership valued at approximately $1.53B in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $2.06B, representing an estimated gain of +34.89% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 45% of the total disclosed MKSI value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Invesco Ltd., Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in MKS INSTRUMENTS INC (MKSI).
This page ranks the largest institutional MKSI shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
665
Total Reported Value
$14.46B
Largest Holder
Blackrock, Inc.
Largest Position
$1.53B
Insider Transactions (90d)
18
Latest Filing Quarter
Q2 2026
New Institutional Positions
102
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.03% | 6,641,730 | $1,526,335,861 | $2,058,803,465 | +$532,467,604 | +34.89% | |
| Invesco Ltd. | 0.13% | 3,721,459 | $855,228,394 | $1,153,577,861 | +$298,349,467 | +34.89% | |
| Vanguard Portfolio Management Llc | 0.04% | 3,685,493 | $846,963,146 | $1,142,429,120 | +$295,465,974 | +34.89% | |
| Vanguard Capital Management Llc | 0.02% | 3,014,201 | $692,693,532 | $934,342,026 | +$241,648,494 | +34.89% | |
| State Street Corp | 0.02% | 2,057,732 | $472,887,391 | $637,855,765 | +$164,968,374 | +34.89% | |
| Capital International Investors | 0.11% | 1,968,770 | $452,443,034 | $610,279,325 | +$157,836,291 | +34.89% | |
| Fmr Llc | 0.02% | 1,933,843 | $444,416,544 | $599,452,653 | +$155,036,109 | +34.89% | |
| Wellington Management Group Llp | 0.08% | 1,833,137 | $421,273,215 | $568,235,807 | +$146,962,592 | +34.89% | |
| Point72 Asset Management, L.P. | 0.64% | 1,610,331 | $370,070,167 | $499,170,403 | +$129,100,236 | +34.89% | |
| Geode Capital Management, Llc | 0.02% | 1,539,319 | $353,818,861 | $477,158,104 | +$123,339,243 | +34.86% | |
| Neuberger Berman Group Llc | 0.25% | 1,433,529 | $329,439,399 | $444,365,319 | +$114,925,920 | +34.89% | |
| Whale Rock Capital Management Llc | 3.88% | 1,306,724 | $300,298,242 | $405,058,306 | +$104,760,064 | +34.89% | |
| Capital World Investors | 0.04% | 1,277,200 | $293,513,332 | $395,906,456 | +$102,393,124 | +34.89% | |
| Westfield Capital Management Co Lp | 1.01% | 1,046,763 | $240,556,578 | $324,475,595 | +$83,919,017 | +34.89% | |
| Citadel Advisors Llc | 0.15% | 947,032 | $217,637,424 | $293,560,979 | +$75,923,555 | +34.89% | |
| Millennium Management Llc | 0.15% | 894,369 | $205,534,940 | $277,236,503 | +$71,701,563 | +34.89% | |
| Victory Capital Management Inc | 0.13% | 878,758 | $201,947,376 | $272,397,405 | +$70,450,029 | +34.89% | |
| Charles Schwab Investment Management Inc | 0.03% | 866,647 | $199,164,147 | $268,643,237 | +$69,479,090 | +34.89% | |
| Dimensional Fund Advisors Lp | 0.04% | 835,345 | $191,879,336 | $258,940,243 | +$67,060,907 | +34.95% | |
| Bank Of New York Mellon Corp | 0.04% | 832,150 | $191,236,622 | $257,949,857 | +$66,713,235 | +34.89% | |
| Principal Financial Group Inc | 0.08% | 614,230 | $141,162,055 | $190,399,015 | +$49,236,960 | +34.88% | |
| Aqr Capital Management Llc | 0.06% | 616,497 | $136,862,293 | $191,101,740 | +$54,239,447 | +39.63% | |
| Northern Trust Corp | 0.02% | 569,224 | $130,813,368 | $176,448,056 | +$45,634,688 | +34.89% | |
| Morgan Stanley | 0.01% | 515,063 | $118,366,809 | $159,659,229 | +$41,292,420 | +34.89% | |
| Samlyn Capital, Llc | 1.96% | 496,685 | $114,143,180 | $153,962,416 | +$39,819,236 | +34.89% | |
| Franklin Resources Inc | 0.03% | 475,893 | $109,364,969 | $147,517,312 | +$38,152,343 | +34.89% | |
| Bank Of America Corp | 0.01% | 463,709 | $106,564,965 | $143,740,516 | +$37,175,551 | +34.89% | |
| Fenghe Fund Management Pte. Ltd. | 14.49% | 456,329 | $104,868,967 | $141,452,863 | +$36,583,896 | +34.89% | |
| Ubs Group Ag | 0.02% | 432,130 | $99,307,795 | $133,951,657 | +$34,643,862 | +34.89% | |
| Vanguard Fiduciary Trust Co | 0.02% | 417,114 | $95,856,968 | $129,296,998 | +$33,440,030 | +34.89% | |
| Balyasny Asset Management L.P. | 0.18% | 407,395 | $93,623,445 | $126,284,302 | +$32,660,857 | +34.89% | |
| Royce & Associates Lp | 0.92% | 403,670 | $92,767,403 | $125,129,627 | +$32,362,224 | +34.89% | |
| Manufacturers Life Insurance Company, The | 0.08% | 400,319 | $91,956,927 | $124,090,884 | +$32,133,957 | +34.94% | |
| Nuveen, Llc | 0.02% | 378,158 | $86,904,490 | $117,221,417 | +$30,316,927 | +34.89% | |
| Contour Asset Management Llc | 2.80% | 374,868 | $86,148,415 | $116,201,583 | +$30,053,168 | +34.89% | |
| Madison Asset Management, Llc | 0.96% | 338,336 | $77,753,102 | $104,877,393 | +$27,124,291 | +34.89% | |
| Raymond James Financial Inc | 0.02% | 337,962 | $75,834,166 | $104,761,461 | +$28,927,295 | +38.15% | |
| Tremblant Capital Group | 2.44% | 329,786 | $75,788,121 | $102,227,064 | +$26,438,943 | +34.89% | |
| Cooke & Bieler Lp | 0.85% | 165,227 | $73,492,970 | $51,217,065 | -$22,275,905 | -30.31% | |
| Nordea Investment Management Ab | 0.07% | 326,308 | $71,477,768 | $101,148,954 | +$29,671,186 | +41.51% | |
| Blue Grotto Capital, Llc | 5.55% | 149,422 | $66,462,906 | $46,317,832 | -$20,145,074 | -30.31% | |
| Timessquare Capital Management, Llc | 1.12% | 288,165 | $66,223,199 | $89,325,387 | +$23,102,188 | +34.89% | |
| Retirement Systems Of Alabama | 0.20% | 145,960 | $64,923,008 | $45,244,681 | -$19,678,327 | -30.31% | |
| Summit Partners Public Asset Management, Llc | 3.07% | 282,206 | $64,853,761 | $87,478,216 | +$22,624,455 | +34.89% | |
| American Century Companies Inc | 0.03% | 280,965 | $64,569,141 | $87,093,531 | +$22,524,390 | +34.88% | |
| Two Sigma Investments, Lp | 0.05% | 278,687 | $64,045,059 | $86,387,396 | +$22,342,337 | +34.89% | |
| Artemis Investment Management Llp | 0.56% | 141,986 | $63,155,373 | $44,012,820 | -$19,142,553 | -30.31% | |
| Nomura Holdings Inc | 0.52% | 269,356 | $61,900,702 | $83,494,973 | +$21,594,271 | +34.89% | |
| Quantinno Capital Management Lp | 0.10% | 259,749 | $59,693,042 | $80,516,995 | +$20,823,953 | +34.89% | |
| Amundi | 0.02% | 254,748 | $58,543,667 | $78,966,785 | +$20,423,118 | +34.89% |
Frequently asked questions about MKSI
Who owns the most MKSI stock?
The largest holders of MKSI are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for MKS INSTRUMENTS INC (MKSI).
Is MKSI widely held by superinvestors?
Many widely followed stocks like MKSI appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly MKSI is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.