MKSI Institutional Ownership & Shareholders
MKS INSTRUMENTS INC (MKSI) is currently held by 742 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $30.50B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of MKSI tracked by InsiderSet, reporting ownership valued at approximately $3.08B in its June 30, 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 $1.40B, representing an estimated loss of -54.58% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 46% 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
742
Total Reported Value
$30.50B
Largest Holder
Blackrock, Inc.
Largest Position
$3.08B
Insider Transactions (90d)
3
Latest Filing Quarter
Q2 2026
New Institutional Positions
64
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.05% | 6,930,030 | $3,082,477,430 | $1,400,143,261 | -$1,682,334,169 | -54.58% | |
| Invesco Ltd. | 0.16% | 4,661,664 | $2,073,508,050 | $941,842,595 | -$1,131,665,455 | -54.58% | |
| Vanguard Portfolio Management Llc | 0.07% | 3,707,327 | $1,649,019,050 | $749,028,347 | -$899,990,703 | -54.58% | |
| Jpmorgan Chase & Co | 0.08% | 3,373,844 | $1,404,811,557 | $681,651,442 | -$723,160,115 | -51.48% | |
| Vanguard Capital Management Llc | 0.03% | 3,049,560 | $1,356,444,288 | $616,133,102 | -$740,311,186 | -54.58% | |
| State Street Corp | 0.03% | 2,134,663 | $949,439,264 | $431,287,313 | -$518,151,951 | -54.57% | |
| Point72 Asset Management, L.P. | 1.36% | 1,996,843 | $888,195,766 | $403,442,160 | -$484,753,606 | -54.58% | |
| Capital International Investors | 0.18% | 1,915,187 | $851,875,178 | $386,944,381 | -$464,930,797 | -54.58% | |
| Price T Rowe Associates Inc | 0.08% | 1,889,901 | $840,629,000 | $381,835,598 | -$458,793,402 | -54.58% | |
| Aspex Management (Hk) Ltd | 9.13% | 1,820,441 | $809,732,000 | $367,801,900 | -$441,930,100 | -54.58% | |
| Geode Capital Management, Llc | 0.04% | 1,539,072 | $686,574,757 | $310,954,107 | -$375,620,650 | -54.71% | |
| Fmr Llc | 0.03% | 1,499,498 | $666,976,512 | $302,958,576 | -$364,017,936 | -54.58% | |
| Wellington Management Group Llp | 0.11% | 1,416,034 | $629,851,923 | $286,095,509 | -$343,756,414 | -54.58% | |
| Capital World Investors | 0.07% | 1,366,290 | $607,725,792 | $276,045,232 | -$331,680,560 | -54.58% | |
| Whale Rock Capital Management | Alex Sacerdote | 4.54% | 1,271,373 | $565,506,710 | $256,868,201 | -$308,638,509 | -54.58% |
| Alkeon Capital Management Llc | 1.84% | 1,072,040 | $476,843,392 | $216,594,962 | -$260,248,430 | -54.58% | |
| Norges Bank | 0.04% | 954,667 | $424,635,882 | $192,880,921 | -$231,754,961 | -54.58% | |
| Westfield Capital Management Co Lp | 1.35% | 928,617 | $413,048,645 | $187,617,779 | -$225,430,866 | -54.58% | |
| Sachem Head Capital Management Lp | 7.50% | 812,700 | $361,488,960 | $164,197,908 | -$197,291,052 | -54.58% | |
| Charles Schwab Investment Management Inc | 0.05% | 808,198 | $359,486,470 | $163,288,324 | -$196,198,146 | -54.58% | |
| Citadel Advisors Llc | 0.18% | 697,670 | $310,323,616 | $140,957,247 | -$169,366,369 | -54.58% | |
| Morgan Stanley | 0.02% | 681,576 | $303,166,053 | $137,705,615 | -$165,460,438 | -54.58% | |
| Bank Of New York Mellon Corp | 0.05% | 658,544 | $292,920,852 | $133,052,230 | -$159,868,622 | -54.58% | |
| Millennium Management Llc | 0.19% | 645,071 | $286,927,581 | $130,330,145 | -$156,597,436 | -54.58% | |
| Aqr Capital Management Llc | 0.10% | 638,333 | $280,240,931 | $128,968,799 | -$151,272,132 | -53.98% | |
| Victory Capital Management Inc | 0.15% | 609,027 | $270,895,210 | $123,047,815 | -$147,847,395 | -54.58% | |
| Qube Research & Technologies Ltd | 0.30% | 606,068 | $269,579,046 | $122,449,979 | -$147,129,067 | -54.58% | |
| Northern Trust Corp | 0.03% | 577,866 | $257,034,798 | $116,752,047 | -$140,282,751 | -54.58% | |
| Dimensional Fund Advisors Lp | 0.04% | 533,145 | $236,974,157 | $107,716,616 | -$129,257,541 | -54.54% | |
| Neuberger Berman Group Llc | 0.17% | 1,461,189 | $233,497,989 | $295,218,626 | +$61,720,637 | +26.43% | |
| Bank Of America Corp | 0.01% | 520,847 | $231,672,747 | $105,231,928 | -$126,440,819 | -54.58% | |
| Fenghe Fund Management Pte. Ltd. | 9.92% | 771,263 | $204,662,350 | $155,825,977 | -$48,836,373 | -23.86% | |
| Vanguard Fiduciary Trust Co | 0.04% | 428,157 | $190,444,234 | $86,504,840 | -$103,939,394 | -54.58% | |
| Goldman Sachs Group Inc | 0.02% | 361,721 | $160,893,536 | $73,082,111 | -$87,811,425 | -54.58% | |
| Nuveen, Llc | 0.04% | 361,411 | $160,755,348 | $73,019,478 | -$87,735,870 | -54.58% | |
| Raymond James Financial Inc | 0.04% | 327,432 | $145,642,116 | $66,154,361 | -$79,487,755 | -54.58% | |
| Ubs Group Ag | 0.02% | 321,728 | $143,104,615 | $65,001,925 | -$78,102,690 | -54.58% | |
| Summit Partners Public Asset Management, Llc | 3.70% | 319,833 | $142,261,718 | $64,619,059 | -$77,642,659 | -54.58% | |
| Madison Asset Management, Llc | 1.68% | 316,694 | $140,865,611 | $63,984,856 | -$76,880,755 | -54.58% | |
| Tremblant Capital Group | 3.77% | 295,385 | $131,387,248 | $59,679,585 | -$71,707,663 | -54.58% | |
| Toms Capital Investment Management Lp | 6.88% | 293,000 | $130,326,400 | $59,197,720 | -$71,128,680 | -54.58% | |
| Timessquare Capital Management, Llc | 1.89% | 288,450 | $128,302,560 | $58,278,438 | -$70,024,122 | -54.58% | |
| Samlyn Capital, Llc | 2.08% | 281,893 | $125,386,007 | $56,953,662 | -$68,432,345 | -54.58% | |
| Principal Financial Group Inc | 0.06% | 458,256 | $121,614,030 | $92,586,042 | -$29,027,988 | -23.87% | |
| Manufacturers Life Insurance Company, The | 0.09% | 265,549 | $118,116,195 | $53,651,520 | -$64,464,675 | -54.58% | |
| Assenagon Asset Management S.A. | 0.12% | 442,273 | $117,361,563 | $89,356,837 | -$28,004,726 | -23.86% | |
| Royce & Associates Lp | 0.94% | 261,567 | $116,345,002 | $52,846,997 | -$63,498,005 | -54.58% | |
| Polar Capital Holdings Plc | 0.33% | 260,442 | $115,844,602 | $52,619,702 | -$63,224,900 | -54.58% | |
| Balyasny Asset Management L.P. | 0.21% | 260,178 | $115,727,174 | $52,566,363 | -$63,160,811 | -54.58% | |
| Natixis Advisors, Llc | 0.13% | 260,170 | $115,723,000 | $52,564,747 | -$63,158,253 | -54.58% |
Frequently asked questions about MKSI
Who are the largest institutional holders of MKSI?
The largest institutional holders of MKSI reported in the latest SEC Form 13F filings include Blackrock, Inc., Invesco Ltd., Vanguard Portfolio Management Llc, Jpmorgan Chase & Co, and Vanguard Capital Management Llc. InsiderSet ranks institutional holders by their latest reported MKSI position.
What is MKSI institutional ownership?
This page tracks MKSI positions reported by institutional investment managers through SEC Form 13F. MKS INSTRUMENTS INC (MKSI) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own MKSI?
InsiderSet currently tracks 742 institutional managers reporting MKSI holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of MKSI shareholders.
How much MKSI stock do institutions own?
Institutional investment managers disclosed approximately $30.50B in MKSI holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was MKSI institutional ownership last updated?
The latest MKSI institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional MKSI holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its MKSI position after the reporting date.
Are institutions buying or selling MKSI?
Institutional buying and selling can be analyzed by comparing MKSI positions across consecutive 13F reporting periods. InsiderSet's MKSI Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View MKSI ownership changes.
How has MKSI institutional ownership changed over time?
InsiderSet tracks MKSI institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.