MKS INC. MKSI
COM · Common Stock · CUSIP 55306N104 · ISIN US55306N1046
Company in Andover, United States
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($5.9m this quarter). Holder counts are more reliable. Shares outstanding: 66.5m as of 2022-11-01, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $82.68. Options: 13 managers hold calls ($16.0m notional), 13 hold puts ($20.5m).
Biggest calls
| GROUP ONE TRADING LLC | — | $4.1m5.0k shares |
| CITADEL ADVISORS LLC | — | $4.0m48.3k shares |
| PEAK6 Investments LLC | — | $1.9m23.1k shares |
| TUDOR INVESTMENT CORP ET AL | — | $1.2m14.9k shares |
| Walleye Trading LLC | — | $1.2m14.9k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | — | $1.0m12.3k shares |
| JANE STREET GROUP, LLC | — | $603.0k7.3k shares |
| SIMPLEX TRADING, LLC | — | $561.0k6.8k shares |
| TWO SIGMA SECURITIES, LLC | — | $496.0k6.0k shares |
| WOLVERINE TRADING, LLC | — | $434.0k5.1k shares |
Biggest puts
| Twin Tree Management, LP | — | $6.5m78.4k shares |
| PEAK6 Investments LLC | — | $4.2m50.4k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | — | $3.3m40.4k shares |
| CITADEL ADVISORS LLC | — | $2.5m30.8k shares |
| JANE STREET GROUP, LLC | — | $1.1m13.9k shares |
| TUDOR INVESTMENT CORP ET AL | — | $869.0k10.5k shares |
| WOLVERINE TRADING, LLC | — | $842.0k9.9k shares |
| SIMPLEX TRADING, LLC | — | $537.0k6.5k shares |
| TWO SIGMA SECURITIES, LLC | — | $207.0k2.5k shares |
| Walleye Trading LLC | — | $190.0k2.3k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution filed 2025-10-17 | 8.8% |
| Invesco Ltd. 13G · institution new · filed 2026-02-12 | 6.5% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.5% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-30 | 5.2% |
Fell to 5% or below in the last year: JPMORGAN CHASE & CO (2.9%, 2026-09-03), VICTORY CAPITAL MANAGEMENT INC (90.0%, 2026-07-24), FMR LLC (3.3%, 2026-05-06), VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC), PRICE T ROWE ASSOCIATES INC /MD/ (4.1%, 2026-02-17)
Insider purchases and sales in Q3 2022
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2020 | 0 | — | 0 | — | — |
| Q1 2021 | 0 | — | 0 | — | — |
| Q2 2021 | 0 | — | 0 | — | — |
| Q3 2021 | 0 | — | 0 | — | — |
| Q4 2021 | 0 | — | 2 | $512.3k | — |
| Q1 2022 | 0 | — | 1 | $45.0k | — |
| Q2 2022 | 0 | — | 0 | — | — |
| Q3 2022 | 2 | $147.5k | 1 | $19.3k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2022-09-01 | Mora Elizabeth Director | Sold | $19.3k200 shares |
| 2022-08-01 | COLELLA GERARD G Director · By The Gerald G. Colella Living Trust | Bought | $117.5k1.0k shares |
| 2022-08-01 | CANNONE PETER III Director | Bought | $30.0k250 shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q3 2022
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.01% of their portfolio | 6.1m $506.6m | — |
| BlackRock Inc. 0.02% of their portfolio | 5.4m $446.2m | — |
| Capital International Investors 0.13% of their portfolio | 5.3m $440.7m | — |
| VICTORY CAPITAL MANAGEMENT INC 0.33% of their portfolio | 3.4m $282.7m | — |
| Carlyle Group Inc. 8.90% of their portfolio | 3.4m $280.4m | — |
| WELLINGTON MANAGEMENT GROUP LLP 0.04% of their portfolio | 2.5m $205.4m | — |
| JPMORGAN CHASE & CO 0.03% of their portfolio | 2.0m $166.3m | — |
| NEUBERGER BERMAN GROUP LLC 0.15% of their portfolio | 1.7m $142.3m | — |
| STATE STREET CORP 0.01% of their portfolio | 1.5m $126.5m | — |
| COOKE & BIELER LP 1.34% of their portfolio | 1.5m $124.9m | — |
| GOLDMAN SACHS GROUP INC 0.03% of their portfolio | 1.4m $112.0m | — |
| Amundi 0.07% of their portfolio | 1.3m $116.0m | — |
| FMR LLC 0.01% of their portfolio | 1.2m $99.2m | — |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.31% of their portfolio | 951.7k $78.7m | — |
| PRINCIPAL FINANCIAL GROUP INC 0.06% of their portfolio | 863.0k $71.3m | — |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 812.8k $67.2m | — |
| ROYCE & ASSOCIATES LP 0.75% of their portfolio | 802.4k $66.3m | — |
| NORGES BANK 0.02% of their portfolio | 794.2k $65.6m | — |
| Invesco Ltd. 0.02% of their portfolio | 788.9k $65.2m | — |
| WESTFIELD CAPITAL MANAGEMENT CO LP 0.50% of their portfolio | 768.4k $63.5m | — |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 735.2k $60.8m | — |
| Bank of New York Mellon Corp 0.01% of their portfolio | 580.6k $48.0m | — |
| Madison Asset Management, LLC 0.75% of their portfolio | 541.0k $44.7m | — |
| Fisher Asset Management, LLC 0.03% of their portfolio | 505.4k $41.8m | — |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 488.6k $40.4m | — |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 439.8k $36.3m | — |
| NORTHERN TRUST CORP 0.01% of their portfolio | 429.8k $35.5m | — |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. 0.46% of their portfolio | 385.4k $31.9m | — |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.25% of their portfolio | 368.3k $30.4m | — |
| Artemis Investment Management LLP 0.35% of their portfolio | 367.5k $30.3m | — |
| ALLIANCEBERNSTEIN L.P. 0.01% of their portfolio | 351.1k $29.0m | — |
| RENAISSANCE TECHNOLOGIES LLC 0.04% of their portfolio | 335.0k $27.7m | — |
| ROYAL BANK OF CANADA 0.01% of their portfolio | 312.1k $25.8m | — |
| DEUTSCHE BANK AG\ 0.02% of their portfolio | 309.9k $25.6m | — |
| VALUE HOLDINGS MANAGEMENT CO. LLC 6.28% of their portfolio | 305.7k $25.3m | — |
| LAZARD ASSET MANAGEMENT LLC 0.03% of their portfolio | 275.3k $22.7m | — |
| LORD, ABBETT & CO. LLC 0.08% of their portfolio | 264.4k $21.8m | — |
| MORGAN STANLEY 0.00% of their portfolio | 263.8k $21.8m | — |
| AMERIPRISE FINANCIAL INC 0.01% of their portfolio | 255.7k $21.0m | — |
| AQR CAPITAL MANAGEMENT LLC 0.05% of their portfolio | 243.7k $20.1m | — |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 218.8k $18.1m | — |
| UBS Group AG 0.01% of their portfolio | 215.4k $17.8m | — |
| WELLS FARGO & COMPANY/MN 0.01% of their portfolio | 213.5k $17.6m | — |
| LOOMIS SAYLES & CO L P 0.04% of their portfolio | 211.6k $17.5m | — |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.20% of their portfolio | 208.0k $17.2m | — |
| SYSTEMATIC FINANCIAL MANAGEMENT LP 0.59% of their portfolio | 195.4k $16.1m | — |
| Rafferty Asset Management, LLC 0.17% of their portfolio | 193.9k $16.0m | — |
| FIRST TRUST ADVISORS LP 0.02% of their portfolio | 187.4k $15.5m | — |
| Nuveen Asset Management, LLC 0.01% of their portfolio | 180.2k $14.9m | — |
| RHUMBLINE ADVISERS 0.02% of their portfolio | 169.4k $14.0m | — |
| Ceredex Value Advisors LLC 0.23% of their portfolio | 169.4k $14.0m | — |
| Retirement Systems of Alabama 0.06% of their portfolio | 166.4k $13.7m | — |
| PRUDENTIAL FINANCIAL INC 0.02% of their portfolio | 145.6k $12.4m | — |
| Swiss National Bank 0.01% of their portfolio | 141.7k $11.7m | — |
| California Public Employees Retirement System 0.01% of their portfolio | 127.8k $10.6m | — |
| Assenagon Asset Management S.A. 0.04% of their portfolio | 124.2k $10.3m | — |
| RAYMOND JAMES & ASSOCIATES 0.01% of their portfolio | 120.9k $10.0m | — |
| NEEDHAM INVESTMENT MANAGEMENT LLC 1.87% of their portfolio | 115.5k $9.5m | — |
| Legal & General Group Plc 0.00% of their portfolio | 113.7k $9.4m | — |
| Verition Fund Management LLC 0.06% of their portfolio | 111.1k $9.2m | — |
| Polar Capital Holdings Plc 0.06% of their portfolio | 110.4k $9.1m | — |
| Channing Capital Management, LLC 0.30% of their portfolio | 104.9k $8.7m | — |
| CITIGROUP INC 0.01% of their portfolio | 103.6k $8.6m | — |
| Edgestream Partners, L.P. 0.65% of their portfolio | 101.1k $8.4m | — |
| BESSEMER GROUP INC 0.02% of their portfolio | 101.0k $8.3m | — |
| COMERICA BANK 0.07% of their portfolio | 99.2k $7.8m | — |
| AMERICAN INTERNATIONAL GROUP, INC. 0.05% of their portfolio | 90.2k $7.5m | — |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 87.3k $7.2m | — |
| STATE OF WISCONSIN INVESTMENT BOARD 0.02% of their portfolio | 86.8k $7.2m | — |
| FIRST NATIONAL BANK OF OMAHA 0.45% of their portfolio | 82.7k $6.8m | — |
| STIFEL FINANCIAL CORP 0.01% of their portfolio | 79.6k $6.6m | — |
| BNP PARIBAS FINANCIAL MARKETS 0.02% of their portfolio | 76.3k $6.3m | — |
| TimesSquare Capital Management, LLC 0.09% of their portfolio | 74.6k $6.2m | — |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 74.4k $6.1m | — |
| Janney Montgomery Scott LLC 0.03% of their portfolio | 73.8k $6.1m | — |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.02% of their portfolio | 72.0k $5.9m | — |
| JANUS HENDERSON GROUP PLC 0.00% of their portfolio | 69.1k $5.7m | — |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio | 68.7k $5.7m | — |
| CFS Investment Advisory Services, LLC 0.00% of their portfolio | 62.2k $1.0k | — |
| PARADIGM CAPITAL MANAGEMENT INC/NY 0.36% of their portfolio | 60.2k $5.0m | — |
| Capital Group Private Client Services, Inc. 0.07% of their portfolio | 58.0k $4.8m | — |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC 0.06% of their portfolio | 56.6k $4.7m | — |
| NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio | 55.3k $4.6m | — |
| Leith Wheeler Investment Counsel Ltd. 0.77% of their portfolio | 55.2k $4.6m | — |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.01% of their portfolio | 54.9k $4.5m | — |
| Holocene Advisors, LP 0.03% of their portfolio | 54.3k $4.5m | — |
| Curi Capital, LLC 0.17% of their portfolio | 54.1k $4.5m | — |
| CREDIT SUISSE AG/ 0.00% of their portfolio | 51.5k $4.3m | — |
| TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY 0.05% of their portfolio | 49.8k $4.1m | — |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 49.6k $4.1m | — |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 48.3k $4.0m | — |
| NFJ INVESTMENT GROUP, LLC 0.09% of their portfolio | 48.1k $3.5m | — |
| GHP Investment Advisors, Inc. 0.30% of their portfolio | 46.8k $3.9m | — |
| Cubist Systematic Strategies, LLC 0.03% of their portfolio | 41.9k $3.5m | — |
| NATIXIS ADVISORS, LLC 0.01% of their portfolio | 41.5k $3.4m | — |
| Banco Santander, S.A. 0.05% of their portfolio | 41.1k $3.4m | — |
| TEXAS PERMANENT SCHOOL FUND CORP 0.05% of their portfolio | 41.1k $3.4m | — |
| State of Tennessee, Department of Treasury 0.02% of their portfolio | 40.9k $3.4m | — |
| AMALGAMATED BANK 0.03% of their portfolio | 40.9k $3.4m | — |
| PEAK6 Investments LLC 0.12% of their portfolio | 39.8k $3.3m | — |