DaveManuel.com · Institutional Ownership · Who Owns It
MKS INC. (MKSI)
Institutional ownership reported to the SEC as of Q2 2026, across 32 quarters.
782
Reporting holders
$33.9B
Reported value
104.9%
Of shares outstanding
6.6%
Calls
1.0%
Puts
+155
Holder change
Institutions report 70,946,347 shares against 67,617,558 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. Over 100% because an adviser and a sub-adviser can both report the same shares, and both are counted.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $3.1B | 6,930,030 | 0.05% | 8q | +4.3%+$128.2M |
| Invesco Ltd. | $2.1B | 4,661,664 | 0.16% | 31q | +25.3%+$418.2M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $1.6B | 3,707,327 | 0.07% | 2q | +0.6%+$9.7M |
| JPMORGAN CHASE & CO | $1.4B | 3,373,844 | 0.08% | 31q | +60.9%+$531.9M |
| VANGUARD CAPITAL MANAGEMENT LLC | $1.4B | 3,049,560 | 0.03% | 2q | +1.2%+$15.7M |
| STATE STREET CORP | $949.4M | 2,134,663 | 0.03% | 31q | +3.7%+$34.2M |
| Point72 Asset Management, L.P. | $890.2M incl. $2.0M options CALL+PUT | 1,996,843 | 0.98% | 4q | +24.0%+$172.3M |
| Capital International Investors | $851.9M | 1,915,187 | 0.18% | 30q | -2.7%-$23.8M |
| PRICE T ROWE ASSOCIATES INC /MD/ | $840.6M | 1,889,901 | 0.08% | 31q | +11.2%+$84.4M |
| JANE STREET GROUP, LLC | $821.5M incl. $819.6M options CALL+PUT | 4,370 | 0.07% | 29q | -98.2%-$44.9B |
| Aspex Management (HK) Ltd | $809.7M | 1,820,441 | 9.11% | 2q | +18.3%+$125.3M |
| GEODE CAPITAL MANAGEMENT, LLC | $686.6M | 1,539,072 | 0.04% | 31q | HELD |
| FMR LLC | $667.0M | 1,499,498 | 0.03% | 31q | -22.5%-$193.2M |
| UBS Group AG | $648.4M incl. $505.3M options CALL | 321,728 | 0.08% | 31q | -25.5%-$222.5M |
| WELLINGTON MANAGEMENT GROUP LLP | $629.9M | 1,416,034 | 0.11% | 31q | -22.8%-$185.5M |
| Capital World Investors | $607.7M | 1,366,290 | 0.07% | 2q | +7.0%+$39.6M |
| Whale Rock Capital Management LLC | $565.5M | 1,271,373 | 4.54% | 2q | -2.7%-$15.7M |
| NEUBERGER BERMAN GROUP LLC | $518.2M | 1,165,068 | 0.34% | 31q | -18.7%-$119.4M |
| NOMURA HOLDINGS INC | $511.9M incl. $468.8M options CALL+PUT | 96,831 | 0.60% | 10q | -64.1%-$912.0M |
| ALKEON CAPITAL MANAGEMENT LLC | $476.8M | 1,072,040 | 0.64% | new | NEW |
| NORGES BANK | $424.6M | 954,667 | 0.04% | 32q | +3.5%+$14.2M |
| WESTFIELD CAPITAL MANAGEMENT CO LP | $413.0M | 928,617 | 1.35% | 4q | -11.3%-$52.6M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $382.7M incl. $368.1M options CALL+PUT | 32,824 | 0.03% | 31q | -10.3%-$43.8M |
| CITADEL ADVISORS LLC | $378.2M incl. $67.9M options CALL+PUT | 697,670 | 0.04% | 31q | -26.3%-$135.2M |
| Sachem Head Capital Management LP | $361.5M | 812,700 | 7.50% | new | NEW |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $359.5M | 808,198 | 0.05% | 31q | -6.7%-$26.0M |
| MORGAN STANLEY | $303.2M | 681,576 | 0.02% | 35q | +32.3%+$74.1M |
| Bank of New York Mellon Corp | $292.9M | 658,544 | 0.05% | 31q | -20.9%-$77.2M |
| MILLENNIUM MANAGEMENT LLC | $287.3M incl. $400.3K options CALL | 645,071 | 0.10% | 12q | -27.9%-$111.0M |
| AQR CAPITAL MANAGEMENT LLC | $280.2M | 638,333 | 0.10% | 12q | +3.5%+$9.6M |
| VICTORY CAPITAL MANAGEMENT INC | $270.9M | 609,027 | 0.15% | 31q | -30.7%-$120.0M |
| Qube Research & Technologies Ltd | $269.6M | 606,068 | 0.25% | 3q | +715.0%+$236.5M |
| FengHe Fund Management Pte. Ltd. | $258.7M | 581,687 | 24.54% | 2q | +27.5%+$55.8M |
| NORTHERN TRUST CORP | $257.0M | 577,866 | 0.03% | 31q | +1.5%+$3.8M |
| DIMENSIONAL FUND ADVISORS LP | $237.0M | 533,145 | 0.04% | 31q | -36.2%-$134.3M |
| BANK OF AMERICA CORP /DE/ | $231.7M | 520,847 | 0.01% | 31q | +12.3%+$25.4M |
| PRINCIPAL FINANCIAL GROUP INC | $211.1M | 474,686 | 0.10% | 31q | -22.7%-$62.1M |
| VANGUARD FIDUCIARY TRUST CO | $190.4M | 428,157 | 0.04% | 2q | +2.6%+$4.9M |
| GOLDMAN SACHS GROUP INC | $160.9M | 361,721 | 0.01% | 31q | +47.3%+$51.6M |
| Nuveen, LLC | $160.8M | 361,411 | 0.04% | 6q | -4.4%-$7.4M |
| RAYMOND JAMES FINANCIAL INC | $145.6M | 327,432 | 0.04% | 7q | -3.1%-$4.7M |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | $142.3M | 319,833 | 2.50% | 5q | +13.3%+$16.7M |
| Madison Asset Management, LLC | $140.9M | 316,694 | 1.68% | 19q | -6.4%-$9.6M |
| TREMBLANT CAPITAL GROUP | $131.4M | 295,385 | 3.77% | 2q | -10.4%-$15.3M |
| TOMS Capital Investment Management LP | $130.3M | 293,000 | 2.79% | new | NEW |
| TimesSquare Capital Management, LLC | $128.3M | 288,450 | 1.89% | 2q | HELD |
| PEAK6 LLC | $127.7M incl. $127.7M options CALL+PUT | 1 | 0.26% | 7q | HELD |
| SAMLYN CAPITAL, LLC | $125.4M | 281,893 | 2.04% | 2q | -43.2%-$95.5M |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $118.1M | 265,549 | 0.09% | 31q | -33.7%-$59.9M |
| ROYCE & ASSOCIATES LP | $116.3M | 261,567 | 0.94% | 31q | -35.2%-$63.2M |
| Polar Capital Holdings Plc | $115.8M | 260,442 | 0.27% | 20q | +260.7%+$83.7M |
| Balyasny Asset Management L.P. | $115.7M | 260,178 | 0.14% | 15q | -36.1%-$65.5M |
| NATIXIS ADVISORS, LLC | $115.7M | 260,170 | 0.13% | 10q | +12.1%+$12.5M |
| SG Americas Securities, LLC | $114.2M incl. $79.3M options CALL+PUT | 78,658 | 0.06% | new | NEW |
| Amundi | $107.5M | 241,670 | 0.03% | 21q | -5.1%-$5.8M |
| NORDEA INVESTMENT MANAGEMENT AB | $102.5M | 232,107 | 0.08% | 16q | -28.9%-$41.6M |
| MARSHALL WACE, LLP | $100.1M | 225,115 | 0.08% | 2q | +128.1%+$56.2M |
| Quantinno Capital Management LP | $99.3M | 223,165 | 0.12% | 10q | -14.1%-$16.3M |
| JONES FINANCIAL COMPANIES LLLP | $97.4M | 250,579 | 0.04% | 10q | +12.0%+$10.4M |
| WELLS FARGO & COMPANY/MN | $96.3M | 216,565 | 0.02% | 31q | -10.9%-$11.8M |
| Penserra Capital Management LLC | $93.8M | 210,802 | 0.72% | 31q | -15.9%-$17.7M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $92.4M | 207,760 | 0.02% | 31q | +1.9%+$1.7M |
| Defiance ETFs, LLC | $86.5M | 210,440 | 1.17% | 3q | -16.0%-$16.5M |
| SYSTEMATIC FINANCIAL MANAGEMENT LP | $85.4M | 192,042 | 1.70% | 31q | -20.7%-$22.2M |
| RHUMBLINE ADVISERS | $80.0M | 179,890 | 0.06% | 31q | HELD |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | $77.0M | 173,207 | 0.04% | 5q | +76880.9%+$76.9M |
| Gotham Asset Management, LLC | $75.7M | 170,226 | 0.18% | 31q | -12.9%-$11.2M |
| COOKE & BIELER LP | $73.5M | 165,227 | 0.85% | 29q | -21.3%-$19.9M |
| Handelsbanken Fonder AB | $73.2M | 164,490 | 0.21% | 9q | -14.6%-$12.5M |
| Evergreen Quality Fund GP, Ltd. | $73.0M | 164,200 | 1.18% | new | NEW |
| VALUE HOLDINGS MANAGEMENT CO. LLC | $70.9M | 159,452 | 11.85% | 31q | -34.9%-$38.1M |
| FIRST TRUST ADVISORS LP | $69.9M | 157,249 | 0.04% | 6q | +202.1%+$46.8M |
| LPL Financial LLC | $69.8M | 156,987 | 0.02% | 31q | -10.3%-$8.0M |
| Caption Management, LLC | $68.9M incl. $64.5M options CALL | 10,000 | 0.32% | 9q | +11.1%+$6.9M |
| FEDERATED HERMES, INC. | $66.6M | 149,659 | 0.10% | 31q | +49.5%+$22.0M |
| Blue Grotto Capital, LLC | $66.5M | 149,422 | 5.55% | 10q | -60.2%-$100.3M |
| TWO SIGMA INVESTMENTS, LP | $65.3M incl. $1.5M options CALL+PUT | 143,365 | 0.05% | 5q | -48.6%-$61.6M |
| Retirement Systems of Alabama | $64.9M | 145,960 | 0.20% | 31q | -7.9%-$5.6M |
| ALLIANCEBERNSTEIN L.P. | $63.4M | 275,713 | 0.02% | 31q | -13.8%-$10.2M |
| Artemis Investment Management LLP | $63.2M | 141,986 | 0.56% | new | NEW |
| Harvey Partners, LLC | $62.7M | 141,066 | 4.30% | 13q | -42.0%-$45.5M |
| Park West Asset Management LLC | $61.7M | 138,740 | 4.20% | 4q | -44.3%-$49.2M |
| Swiss National Bank | $60.7M | 136,400 | 0.03% | 31q | +2.6%+$1.6M |
| Rockefeller Capital Management L.P. | $60.2M | 135,386 | 0.09% | 4q | +10756.9%+$59.7M |
| TORONTO DOMINION BANK | $60.0M | 134,904 | 0.07% | 3q | +248.7%+$42.8M |
| SummitTX Capital, L.P. | $58.7M | 132,009 | 1.51% | 6q | -18.0%-$12.9M |
| CRAMER ROSENTHAL MCGLYNN LLC | $58.4M | 131,194 | 2.95% | 3q | -11.6%-$7.6M |
| California Public Employees Retirement System | $57.4M | 128,961 | 0.03% | 31q | +4.6%+$2.5M |
| DENDUR CAPITAL LP | $55.2M | 124,000 | 2.90% | 2q | -42.2%-$40.3M |
| ROYAL BANK OF CANADA | $54.7M | 122,876 | 0.01% | 31q | -19.7%-$13.4M |
| FRONTIER CAPITAL MANAGEMENT CO LLC | $53.7M | 120,625 | 0.50% | 30q | -25.2%-$18.1M |
| Spyglass Capital Management LLC | $52.7M | 118,526 | 2.85% | new | NEW |
| BARCLAYS PLC | $52.5M incl. $533.8K options PUT | 116,845 | 0.01% | 31q | -27.6%-$20.1M |
| BANK OF MONTREAL /CAN/ | $52.4M | 117,782 | 0.02% | 31q | +0.6%+$289.1K |
| Legal & General Group Plc | $51.8M | 117,817 | 0.01% | 31q | +30.9%+$12.2M |
| Thrivent Financial for Lutherans | $50.7M | 113,938 | 0.09% | 31q | -20.7%-$13.2M |
| Mizuho Markets Cayman LP | $50.3M | 113,090 | 1.89% | 3q | -35.4%-$27.5M |
| NEEDHAM INVESTMENT MANAGEMENT LLC | $49.9M | 112,250 | 1.50% | 31q | -6.5%-$3.4M |
| SORA INVESTORS LLC | $47.8M | 107,496 | 3.67% | 2q | -34.0%-$24.6M |
| LIGHT STREET CAPITAL MANAGEMENT, LLC | $46.2M | 103,800 | 5.11% | 3q | -15.1%-$8.2M |
Showing the largest 100 of 782 reported holders.
What the insiders did
Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.
Officers and directors
| Date | Insider | Role | Side | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-27 | COLELLA GERALD G | Director | Sold | 20,000 | $6.7M ×7 |
| 2026-05-22 | Lee John Tseng-Chung | President & CEO | Sold | 10,000 | $3.2M |
| 2026-08-14 | Lee John Tseng-Chung | President & CEO | Sold | 10,000 | $3.0M |
| 2026-05-22 | Mayampurath Ramakumar | EVP & CFO | Sold | 8,810 | $2.8M |
| 2026-06-01 | Henry David Philip | EVP, Global Str Mktg & GM, MSD | Sold | 6,000 | $1.9M |
| 2026-05-11 | Burke Kathleen Flaherty | EVP, GC & Secretary | Sold | 4,355 | $1.4M |
| 2026-06-12 | Schreiner James Alan | EVP & COO | Sold | 3,500 | $1.2M ×3 |
| 2026-05-11 | Taranto Eric Robert | EVP & GM, VSD | Sold | 2,849 | $911.3K |
| 2026-05-26 | Henry David Philip | EVP, Global Str Mktg & GM, MSD | Sold | 2,500 | $826.2K |
| 2026-06-05 | McCarthy Michelle M | SVP & Chief Accounting Officer | Sold | 2,434 | $767.3K |
| 2026-05-27 | Donahue Joseph B | Director | Sold | 2,100 | $688.7K |
| 2026-05-13 | Moloney Jacqueline F | Director | Sold | 1,400 | $446.6K |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q3 2026 | 179 | $507.6M | 1,914,776 | 26 | 62 | 49 | 0.0% |
| Q2 2026 | 782 | $33.9B | 70,946,347 | 210 | 240 | 249 | 7.5% |
| Q1 2026 | 627 | $16.3B | 69,017,223 | 154 | 196 | 189 | 3.3% |
| Q4 2025 | 521 | $11.7B | 70,691,159 | 109 | 165 | 137 | 3.4% |
| Q3 2025 | 444 | $9.3B | 72,705,886 | 78 | 137 | 136 | 3.3% |
| Q2 2025 | 404 | $7.7B | 75,419,380 | 74 | 145 | 133 | 2.9% |
| Q1 2025 | 403 | $5.9B | 71,581,399 | 58 | 162 | 114 | 2.9% |
| Q4 2024 | 425 | $7.6B | 70,475,825 | 45 | 159 | 124 | 2.8% |
| Q3 2024 | 411 | $7.7B | 68,629,925 | 66 | 172 | 105 | 3.0% |
| Q2 2024 | 399 | $9.5B | 70,651,537 | 80 | 135 | 117 | 2.8% |
| Q1 2024 | 351 | $9.6B | 71,574,433 | 53 | 111 | 107 | 0.8% |
| Q4 2023 | 332 | $7.1B | 68,600,947 | 46 | 105 | 112 | 0.5% |
| Q3 2023 | 325 | $5.8B | 67,022,569 | 47 | 113 | 92 | 0.4% |
| Q2 2023 | 324 | $7.4B | 67,794,846 | 42 | 117 | 100 | 0.5% |
| Q1 2023 | 326 | $6.2B | 70,013,052 | 37 | 93 | 119 | 0.4% |
| Q4 2022 | 322 | $5.8B | 67,483,164 | 32 | 114 | 117 | 0.5% |
| Q3 2022 | 349 | $5.6B | 67,500,297 | 41 | 147 | 108 | 0.6% |
| Q2 2022 | 369 | $7.3B | 70,600,438 | 47 | 138 | 112 | 0.3% |
| Q1 2022 | 390 | $9.1B | 60,493,607 | 41 | 143 | 113 | 0.5% |
| Q4 2021 | 402 | $14.5B | 82,990,145 | 58 | 135 | 113 | 0.3% |
| Q3 2021 | 369 | $14.4B | 95,065,050 | 59 | 111 | 110 | 0.3% |
| Q2 2021 | 374 | $12.4B | 69,598,132 | 57 | 112 | 117 | 0.4% |
| Q1 2021 | 348 | $13.9B | 74,638,327 | 48 | 108 | 129 | 0.5% |
| Q4 2020 | 350 | $10.9B | 71,750,332 | 49 | 106 | 125 | 1.1% |
| Q3 2020 | 336 | $7.7B | 70,573,942 | 55 | 99 | 119 | 0.2% |
| Q2 2020 | 316 | $8.4B | 74,204,979 | 51 | 91 | 121 | 0.3% |
| Q1 2020 | 305 | $8.4B | 102,897,194 | 33 | 96 | 116 | 0.2% |
| Q4 2019 | 347 | $7.8B | 70,714,312 | 59 | 101 | 109 | 0.2% |
| Q3 2019 | 300 | $6.7B | 72,265,601 | 38 | 79 | 125 | 0.3% |
| Q2 2019 | 306 | $5.7B | 73,108,117 | 36 | 87 | 123 | 0.4% |
| Q1 2019 | 331 | $13.7B | 147,441,224 | 48 | 96 | 127 | 0.2% |
| Q4 2018 | 348 | $15.8B | 243,414,875 | 5 | 6 | 7 | 0.2% |