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 June 30, 2026. The institutional investors covered on this page collectively reported approximately $29.06B 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 $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 $2.22B, representing an estimated loss of -27.89% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 47% 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
758
Total Reported Value
$29.06B
Largest Holder
Blackrock, Inc.
Largest Position
$3.08B
Insider Transactions (90d)
20
Latest Filing Quarter
Q2 2026
New Institutional Positions
117
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 | $2,222,737,822 | -$859,739,608 | -27.89% | |
| Invesco Ltd. | 0.16% | 4,661,664 | $2,073,508,050 | $1,495,182,111 | -$578,325,939 | -27.89% | |
| Vanguard Portfolio Management Llc | 0.07% | 3,707,327 | $1,649,019,050 | $1,189,088,062 | -$459,930,988 | -27.89% | |
| Jpmorgan Chase & Co | 0.08% | 3,373,844 | $1,404,811,557 | $1,082,126,725 | -$322,684,832 | -22.97% | |
| Vanguard Capital Management Llc | 0.03% | 3,049,560 | $1,356,444,288 | $978,115,874 | -$378,328,414 | -27.89% | |
| State Street Corp | 0.03% | 2,134,663 | $949,439,264 | $684,671,811 | -$264,767,453 | -27.89% | |
| Point72 Asset Management, L.P. | 1.36% | 1,996,843 | $888,195,766 | $640,467,424 | -$247,728,342 | -27.89% | |
| Capital International Investors | 0.18% | 1,915,187 | $851,875,178 | $614,277,078 | -$237,598,100 | -27.89% | |
| Geode Capital Management, Llc | 0.04% | 1,539,072 | $686,574,757 | $493,641,953 | -$192,932,804 | -28.10% | |
| Fmr Llc | 0.03% | 1,499,498 | $666,976,512 | $480,948,989 | -$186,027,523 | -27.89% | |
| Wellington Management Group Llp | 0.11% | 1,416,034 | $629,851,923 | $454,178,745 | -$175,673,178 | -27.89% | |
| Capital World Investors | 0.07% | 1,366,290 | $607,725,792 | $438,223,855 | -$169,501,937 | -27.89% | |
| Whale Rock Capital Management Llc | 4.54% | 1,271,373 | $565,506,710 | $407,780,176 | -$157,726,534 | -27.89% | |
| Neuberger Berman Group Llc | 0.35% | 1,165,068 | $518,222,089 | $373,683,910 | -$144,538,179 | -27.89% | |
| Alkeon Capital Management Llc | 1.84% | 1,072,040 | $476,843,392 | $343,846,110 | -$132,997,282 | -27.89% | |
| Norges Bank | 0.04% | 954,667 | $424,635,882 | $306,199,894 | -$118,435,988 | -27.89% | |
| Westfield Capital Management Co Lp | 1.35% | 928,617 | $413,048,645 | $297,844,617 | -$115,204,028 | -27.89% | |
| Sachem Head Capital Management Lp | 7.50% | 812,700 | $361,488,960 | $260,665,398 | -$100,823,562 | -27.89% | |
| Charles Schwab Investment Management Inc | 0.05% | 808,198 | $359,486,470 | $259,221,427 | -$100,265,043 | -27.89% | |
| Sixth Street Partners Management Company, L.P. | 0.05% | 808,198 | $359,486,470 | $259,221,427 | -$100,265,043 | -27.89% | |
| Citadel Advisors Llc | 0.18% | 697,670 | $310,323,616 | $223,770,676 | -$86,552,940 | -27.89% | |
| Morgan Stanley | 0.02% | 681,576 | $303,166,053 | $218,608,686 | -$84,557,367 | -27.89% | |
| Bank Of New York Mellon Corp | 0.05% | 658,544 | $292,920,852 | $211,221,403 | -$81,699,449 | -27.89% | |
| Millennium Management Llc | 0.19% | 645,071 | $286,927,581 | $206,900,073 | -$80,027,508 | -27.89% | |
| Aqr Capital Management Llc | 0.10% | 638,333 | $280,240,931 | $204,738,926 | -$75,502,005 | -26.94% | |
| Victory Capital Management Inc | 0.15% | 609,027 | $270,895,210 | $195,339,320 | -$75,555,890 | -27.89% | |
| Qube Research & Technologies Ltd | 0.30% | 606,068 | $269,579,046 | $194,390,250 | -$75,188,796 | -27.89% | |
| Fenghe Fund Management Pte. Ltd. | 24.54% | 581,687 | $258,734,378 | $186,570,288 | -$72,164,090 | -27.89% | |
| Northern Trust Corp | 0.03% | 577,866 | $257,034,798 | $185,344,741 | -$71,690,057 | -27.89% | |
| Dimensional Fund Advisors Lp | 0.04% | 533,145 | $236,974,157 | $171,000,927 | -$65,973,230 | -27.84% | |
| Bank Of America Corp | 0.01% | 520,847 | $231,672,747 | $167,056,467 | -$64,616,280 | -27.89% | |
| Principal Financial Group Inc | 0.10% | 474,686 | $211,093,806 | $152,250,788 | -$58,843,018 | -27.88% | |
| Vanguard Fiduciary Trust Co | 0.04% | 428,157 | $190,444,234 | $137,327,076 | -$53,117,158 | -27.89% | |
| Goldman Sachs Group Inc | 0.02% | 361,721 | $160,893,536 | $116,018,394 | -$44,875,142 | -27.89% | |
| Nuveen, Llc | 0.04% | 361,411 | $160,755,348 | $115,918,964 | -$44,836,384 | -27.89% | |
| Raymond James Financial Inc | 0.04% | 327,432 | $145,642,116 | $105,020,540 | -$40,621,576 | -27.89% | |
| Ubs Group Ag | 0.02% | 321,728 | $143,104,615 | $103,191,039 | -$39,913,576 | -27.89% | |
| Summit Partners Public Asset Management, Llc | 3.70% | 319,833 | $142,261,718 | $102,583,236 | -$39,678,482 | -27.89% | |
| Madison Asset Management, Llc | 1.68% | 316,694 | $140,865,611 | $101,576,434 | -$39,289,177 | -27.89% | |
| Tremblant Capital Group | 3.77% | 295,385 | $131,387,248 | $94,741,785 | -$36,645,463 | -27.89% | |
| Toms Capital Investment Management Lp | 6.88% | 293,000 | $130,326,400 | $93,976,820 | -$36,349,580 | -27.89% | |
| Timessquare Capital Management, Llc | 1.89% | 288,450 | $128,302,560 | $92,517,453 | -$35,785,107 | -27.89% | |
| Samlyn Capital, Llc | 2.08% | 281,893 | $125,386,007 | $90,414,361 | -$34,971,646 | -27.89% | |
| Manufacturers Life Insurance Company, The | 0.09% | 265,549 | $118,116,195 | $85,172,186 | -$32,944,009 | -27.89% | |
| Royce & Associates Lp | 0.94% | 261,567 | $116,345,002 | $83,895,000 | -$32,450,002 | -27.89% | |
| Polar Capital Holdings Plc | 0.33% | 260,442 | $115,844,602 | $83,534,167 | -$32,310,435 | -27.89% | |
| Balyasny Asset Management L.P. | 0.21% | 260,178 | $115,727,174 | $83,449,492 | -$32,277,682 | -27.89% | |
| Amundi | 0.03% | 241,670 | $107,494,802 | $77,513,236 | -$29,981,566 | -27.89% | |
| Nordea Investment Management Ab | 0.08% | 232,107 | $102,535,588 | $74,445,999 | -$28,089,589 | -27.39% | |
| Marshall Wace, Llp | 0.08% | 225,115 | $100,131,152 | $72,203,385 | -$27,927,767 | -27.89% |
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.