MKSI MKS Inc.
MKS Inc. (MKSI) Institutional Ownership
What the institutions did with MKSI last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 6.9M | 9.8% |
| Invesco Ltd. | 4.7M | 6.6% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 3.7M | 5.2% |
| JPMORGAN CHASE & CO | 3.4M | 4.8% |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.0M | 4.3% |
| STATE STREET CORP | 2.1M | 3.0% |
| Point72 Asset Management, L.P. | 2.0M | 2.8% |
| Capital International Investors | 1.9M | 2.7% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.9M | 2.7% |
| Aspex Management (HK) Ltd | 1.8M | 2.6% |
| GEODE CAPITAL MANAGEMENT, LLC | 1.5M | 2.2% |
| FMR LLC | 1.5M | 2.1% |
| WELLINGTON MANAGEMENT GROUP LLP | 1.4M | 2.0% |
| Capital World Investors | 1.4M | 1.9% |
| Whale Rock Capital Management LLC | 1.3M | 1.8% |
| NEUBERGER BERMAN GROUP LLC | 1.2M | 1.6% |
| ALKEON CAPITAL MANAGEMENT LLC | 1.1M | 1.5% |
| NORGES BANK | 954.7K | 1.3% |
| WESTFIELD CAPITAL MANAGEMENT CO LP | 928.6K | 1.3% |
| Sachem Head Capital Management LP | 812.7K | 1.1% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 808.2K | 1.1% |
| CITADEL ADVISORS LLC | 697.7K | 1.0% |
| MORGAN STANLEY | 681.6K | 1.0% |
| Bank of New York Mellon Corp | 658.5K | 0.9% |
| MILLENNIUM MANAGEMENT LLC | 645.1K | 0.9% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| JPMORGAN CHASE & CO | Increased | 2.1M | 3.4M | +1.3M |
| ALKEON CAPITAL MANAGEMENT LLC | New | 0 | 1.1M | +1.1M |
| Invesco Ltd. | Increased | 3.7M | 4.7M | +940.2K |
| Sachem Head Capital Management LP | New | 0 | 812.7K | +812.7K |
| Qube Research & Technologies Ltd | Increased | 74.4K | 606.1K | +531.7K |
| FMR LLC | Reduced | 1.9M | 1.5M | -434.3K |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | 1.8M | 1.4M | -417.1K |
| FRANKLIN RESOURCES INC | Reduced | 475.9K | 85.7K | -390.2K |
| Point72 Asset Management, L.P. | Increased | 1.6M | 2.0M | +386.5K |
| Contour Asset Management LLC | Sold Out | 374.9K | 0 | -374.9K |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 835.3K | 533.1K | -302.2K |
| TOMS Capital Investment Management LP | New | 0 | 293.0K | +293.0K |
| BlackRock, Inc. | Increased | 6.6M | 6.9M | +288.3K |
| Aspex Management (HK) Ltd | Increased | 1.5M | 1.8M | +281.7K |
| AMERICAN CENTURY COMPANIES INC | Reduced | 281.0K | 5.6K | -275.4K |
| VICTORY CAPITAL MANAGEMENT INC | Reduced | 878.8K | 609.0K | -269.7K |
| NEUBERGER BERMAN GROUP LLC | Reduced | 1.4M | 1.2M | -268.5K |
| CITADEL ADVISORS LLC | Reduced | 947.0K | 697.7K | -249.4K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 894.4K | 645.1K | -249.3K |
| JANE STREET GROUP, LLC | Reduced | 243.3K | 4.4K | -238.9K |
| Blue Grotto Capital, LLC | Reduced | 375.0K | 149.4K | -225.6K |
| SAMLYN CAPITAL, LLC | Reduced | 496.7K | 281.9K | -214.8K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 1.7M | 1.9M | +189.8K |
| Polar Capital Holdings Plc | Increased | 72.2K | 260.4K | +188.2K |
| Bank of New York Mellon Corp | Reduced | 832.2K | 658.5K | -173.6K |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | Increased | 225 | 173.2K | +173.0K |
| NOMURA HOLDINGS INC | Reduced | 269.4K | 96.8K | -172.5K |
| MORGAN STANLEY | Increased | 515.1K | 681.6K | +166.5K |
| Evergreen Quality Fund GP, Ltd. | New | 0 | 164.2K | +164.2K |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Reduced | 166.1K | 13.0K | -153.0K |
| Balyasny Asset Management L.P. | Reduced | 407.4K | 260.2K | -147.2K |
| ROYCE & ASSOCIATES LP | Reduced | 403.7K | 261.6K | -142.1K |
| Artemis Investment Management LLP | New | 0 | 142.0K | +142.0K |
| PRINCIPAL FINANCIAL GROUP INC | Reduced | 614.2K | 474.7K | -139.5K |
| TWO SIGMA INVESTMENTS, LP | Reduced | 278.7K | 143.4K | -135.3K |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | Reduced | 400.3K | 265.5K | -134.8K |
| Polaris Capital Management, LLC | Sold Out | 134.7K | 0 | -134.7K |
| Rockefeller Capital Management L.P. | Increased | 1.2K | 135.4K | +134.1K |
| MARSHALL WACE, LLP | Increased | 98.7K | 225.1K | +126.4K |
| FengHe Fund Management Pte. Ltd. | Increased | 456.3K | 581.7K | +125.4K |
| Spyglass Capital Management LLC | New | 0 | 118.5K | +118.5K |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | Reduced | 186.0K | 67.6K | -118.4K |
| WESTFIELD CAPITAL MANAGEMENT CO LP | Reduced | 1.0M | 928.6K | -118.1K |
| GOLDMAN SACHS GROUP INC | Increased | 245.6K | 361.7K | +116.1K |
| D. E. Shaw & Co., Inc. | Reduced | 120.2K | 4.3K | -115.8K |
| Ceredex Value Advisors LLC | Reduced | 169.5K | 56.7K | -112.8K |
| Park West Asset Management LLC | Reduced | 249.2K | 138.7K | -110.5K |
| UBS Group AG | Reduced | 432.1K | 321.7K | -110.4K |
| FIRST TRUST ADVISORS LP | Increased | 52.1K | 157.2K | +105.2K |
| Harvey Partners, LLC | Reduced | 243.4K | 141.1K | -102.3K |
| GLENVIEW CAPITAL MANAGEMENT, LLC | New | 0 | 98.5K | +98.5K |
| TORONTO DOMINION BANK | Increased | 38.7K | 134.9K | +96.2K |
| NORDEA INVESTMENT MANAGEMENT AB | Reduced | 326.3K | 232.1K | -94.2K |
| DENDUR CAPITAL LP | Reduced | 214.5K | 124.0K | -90.5K |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 148.7K | 59.3K | -89.4K |
| Capital World Investors | Increased | 1.3M | 1.4M | +89.1K |
| MARSICO CAPITAL MANAGEMENT LLC | New | 0 | 88.2K | +88.2K |
| Rivermont Capital Management LP | Sold Out | 87.5K | 0 | -87.5K |
| VALUE HOLDINGS MANAGEMENT CO. LLC | Reduced | 245.1K | 159.5K | -85.6K |
| BESSEMER GROUP INC | Reduced | 117.9K | 33.6K | -84.3K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.