Mks Inc (MKSI) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

54,995,434Shares Outstanding

284,326Shares held by institutions

$74,760,678Value of institutional holdings

94.35%Institutional ownership %

0.04%Shares Changed QoQ

310No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

According to SEC filings for the period ending December 2025, Mks Inc (NASDAQ:MKSI) is held by 482 institutional firms.

Mks saw its institutional ownership percentage fell to 95.5% in December 2025 from 107.5% in September 2025.
On a quarter-over-quarter basis, institutional holdings shifted by -0.33%, with a year-over-year an increase of 16.43% in the count of filers.
Among the 482 institutional holders of Mks, 289 added to their stakes while 138 trimmed their positions and 55 held steady.
The aggregate institutional position in Mks now stands at 64.52Mn shares as of December 2025, after investors decreased their holdings (down by 215.62K shares quarter on quarter which is down 7.50Mn shares year over year).
As of December 31, 2025, VANGUARD GROUP INC held Mks's largest shareholding position with over 7.49Mn shares, representing 11.08% of total outstanding shares.
Among the most significant buyers of Mks during December 2025 were NORGES BANK (922.74K), JPMORGAN CHASE & CO (886.85K), Southpoint Capital Advisors LP (600.00K), UBS Group AG (577.07K), WESTFIELD CAPITAL MANAGEMENT CO LP (516.41K).
Leading sellers of Mks stock in December 2025 included VICTORY CAPITAL MANAGEMENT INC (1.02Mn), NORDEA INVESTMENT MANAGEMENT AB (996.60K), FRONTIER CAPITAL MANAGEMENT CO LLC (530.03K), WELLINGTON MANAGEMENT GROUP LLP (461.77K), Point72 Asset Management, L.P. (387.75K).
The top 10 institutional holders of Mks for the quarter ending December 2025 included VANGUARD GROUP INC (7.49Mn), BlackRock, Inc. (6.14Mn), Capital International Investors (3.24Mn), FMR LLC (3.20Mn), VICTORY CAPITAL MANAGEMENT INC (2.56Mn), WELLINGTON MANAGEMENT GROUP LLP (2.55Mn), STATE STREET CORP (2.02Mn), JPMORGAN CHASE & CO (1.55Mn), Neuberger Berman Group LLC (1.46Mn), GEODE CAPITAL MANAGEMENT, LLC (1.25Mn).

482 Institutional Holders

284,326 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
VANGUARD GROUP INC	31 Dec, 2025	7,487,305	-264,792	-3.42%	$1,196,471,339.00
BlackRock, Inc.	31 Dec, 2025	6,138,839	15,510	0.25%	$980,986,438.00
Capital International Investors	31 Dec, 2025	3,239,230	-15,433	-0.47%	$517,628,954.00
FMR LLC	31 Dec, 2025	3,198,335	-244,929	-7.11%	$511,094,010.00
VICTORY CAPITAL MANAGEMENT INC	31 Dec, 2025	2,562,399	-1,019,817	-28.47%	$409,471,360.00
WELLINGTON MANAGEMENT GROUP LLP	31 Dec, 2025	2,552,021	-461,774	-15.32%	$407,812,955.00
STATE STREET CORP	31 Dec, 2025	2,017,590	-26,367	-1.29%	$322,410,882.00
JPMORGAN CHASE & CO	31 Dec, 2025	1,551,443	886,847	133.44%	$247,920,742.00
Neuberger Berman Group LLC	31 Dec, 2025	1,461,189	-173,607	-10.62%	$233,497,989.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	1,254,049	5,551	0.44%	$200,437,891.00
UBS Group AG	31 Dec, 2025	1,230,913	577,070	88.26%	$196,699,897.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	1,117,487	-147,878	-11.69%	$178,581,199.00
FRANKLIN RESOURCES INC	31 Dec, 2025	1,041,725	-367,228	-26.06%	$166,467,655.00
COOKE & BIELER LP	31 Dec, 2025	966,703	-355,174	-26.87%	$154,479,139.00
JANE STREET GROUP, LLC	31 Dec, 2025	935,415	254,673	37.41%	$149,479,316.00
NORGES BANK	31 Dec, 2025	922,737	922,737	0.00%	$147,453,373.00
Madison Asset Management, LLC	31 Dec, 2025	921,450	-54,641	-5.60%	$147,247,760.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	870,654	24,349	2.88%	$139,130,509.00
WESTFIELD CAPITAL MANAGEMENT CO LP	31 Dec, 2025	839,773	516,409	159.70%	$134,195,725.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	817,251	371,003	83.14%	$130,596,710.00

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