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 ($18.9m this quarter). Holder counts are more reliable. Shares outstanding: 66.9m as of 2023-07-31, 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 ≈ $107.98. Options: 11 managers hold calls ($22.3m notional), 9 hold puts ($11.9m).
Trends to Q2 2023
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 357 |
| Q4 2022 | 316 |
| Q1 2023 | 325 |
| Q2 2023 | 321 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2022 | 155 | 177 |
| Q1 2023 | 140 | 155 |
| Q2 2023 | 161 | 156 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2022 | $16.0m | $20.5m | 1.28 |
| Q4 2022 | $10.2m | $17.7m | 1.74 |
| Q1 2023 | $13.9m | $8.9m | 0.64 |
| Q2 2023 | $22.3m | $11.9m | 0.53 |
Biggest buyers
| PRICE T ROWE ASSOCIATES INC /MD/ | Added | +1.7m |
| WELLINGTON MANAGEMENT GROUP LLP | Added | +1.0m |
| Invesco Ltd. | Added | +681.0k |
| NORGES BANK | Added | +578.5k |
| Capital Research Global Investors | New | +314.8k |
| Bank of New York Mellon Corp | Added | +306.0k |
| VICTORY CAPITAL MANAGEMENT INC | Added | +299.7k |
| BlackRock Inc. | Added | +234.5k |
| FRONTIER CAPITAL MANAGEMENT CO LLC | Added | +166.1k |
| Harvey Partners, LLC | New | +155.0k |
Biggest sellers
| Carlyle Group Inc. | Reduced | -5.0m |
| FMR LLC | Reduced | -2.4m |
| DIMENSIONAL FUND ADVISORS LP | Reduced | -287.1k |
| JPMORGAN CHASE & CO | Reduced | -272.1k |
| RENAISSANCE TECHNOLOGIES LLC | Sold out | -229.2k |
| COOKE & BIELER LP | Reduced | -209.6k |
| BANK OF AMERICA CORP /DE/ | Reduced | -186.5k |
| STRS OHIO | Reduced | -156.9k |
| Amundi | Reduced | -133.7k |
| TWO SIGMA INVESTMENTS, LP | Reduced | -107.7k |
Biggest calls
| CITADEL ADVISORS LLC | Reduced | $6.6m61.3k shares |
| Walleye Trading LLC | Added | $4.9m45.3k shares |
| JANE STREET GROUP, LLC | Added | $3.8m35.6k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $3.2m29.4k shares |
| Cubist Systematic Strategies, LLC | Added | $1.4m12.7k shares |
| TWO SIGMA SECURITIES, LLC | Added | $1.0m9.3k shares |
| PEAK6 Investments LLC | Reduced | $627.0k5.8k shares |
| SIMPLEX TRADING, LLC | Added | $454.0k4.2k shares |
| Walleye Capital LLC | Reduced | $313.5k2.9k shares |
| GROUP ONE TRADING LLC | New | $21.6k200 shares |
Biggest puts
| CITADEL ADVISORS LLC | Added | $5.5m51.3k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $2.8m26.0k shares |
| Cubist Systematic Strategies, LLC | Added | $1.3m11.9k shares |
| Walleye Capital LLC | Added | $940.5k8.7k shares |
| Walleye Trading LLC | Added | $637.8k5.9k shares |
| TWO SIGMA SECURITIES, LLC | Reduced | $400.0k3.7k shares |
| SIMPLEX TRADING, LLC | Reduced | $162.0k1.5k shares |
| PEAK6 Investments LLC | Reduced | $129.7k1.2k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 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 Q2 2023
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 |
|---|---|---|---|---|---|
| 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 | — |
| Q4 2022 | 0 | — | 2 | $54.6k | — |
| Q1 2023 | 0 | — | 2 | $36.8k | — |
| Q2 2023 | 0 | — | 2 | $41.3k | $41.3k |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2023-06-01 | Moloney Jacqueline F Director | Sold plan | $21.9k225 shares |
| 2023-06-01 | Mora Elizabeth Director | Sold plan | $19.4k200 shares |
| 2023-05-08 | TC Group Cayman Investment Holdings, L.P. +7 10% owner · See footnotes | Sold | $172.3m2.0m shares |
| 2023-05-08 | Carlyle Asia Partners IV, L.P. +7 10% owner · See footnotes | Sold | $172.3m2.0m 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, Q2 2023
| Manager | Shares | Change |
|---|---|---|
| Capital International Investors 0.18% of their portfolio | 6.9m $750.3m | Added +50.4k |
| VANGUARD GROUP INC 0.02% of their portfolio | 6.7m $720.6m | Added +152.2k |
| BlackRock Inc. 0.02% of their portfolio | 5.7m $618.1m | Added +234.5k |
| VICTORY CAPITAL MANAGEMENT INC 0.48% of their portfolio | 4.1m $440.7m | Added +299.7k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.05% of their portfolio | 3.6m $387.8m | Added +1.7m |
| Carlyle Group Inc. 13.41% of their portfolio | 3.5m $376.5m | Reduced -5.0m |
| FMR LLC 0.03% of their portfolio | 3.1m $338.0m | Reduced -2.4m |
| WELLINGTON MANAGEMENT GROUP LLP 0.06% of their portfolio | 2.7m $295.9m | Added +1.0m |
| Invesco Ltd. 0.06% of their portfolio | 2.2m $237.9m | Added +681.0k |
| STATE STREET CORP 0.01% of their portfolio | 1.6m $176.6m | Added +23.9k |
| NEUBERGER BERMAN GROUP LLC 0.16% of their portfolio | 1.6m $173.8m | Reduced -87.8k |
| NORGES BANK 0.03% of their portfolio | 1.4m $152.0m | Added +578.5k |
| JPMORGAN CHASE & CO 0.02% of their portfolio | 1.4m $151.1m | Reduced -272.1k |
| COOKE & BIELER LP 1.20% of their portfolio | 1.2m $129.1m | Reduced -209.6k |
| Bank of New York Mellon Corp 0.03% of their portfolio | 1.2m $126.5m | Added +306.0k |
| GOLDMAN SACHS GROUP INC 0.03% of their portfolio | 1.1m $118.1m | Added +68.9k |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.36% of their portfolio | 1.0m $111.2m | Added +131.9k |
| ROYCE & ASSOCIATES LP 1.06% of their portfolio | 1.0m $109.1m | Added +122.8k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 932.5k $100.8m | Added +76.8k |
| PRINCIPAL FINANCIAL GROUP INC 0.07% of their portfolio | 931.1k $100.6m | Added +890 |
| Polaris Capital Management, LLC 2.62% of their portfolio | 645.7k $69.8m | Reduced -5.1k |
| Channing Capital Management, LLC 1.93% of their portfolio | 580.0k $62.7m | Added +35.8k |
| Madison Asset Management, LLC 0.90% of their portfolio | 571.4k $61.8m | Added +3.5k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.02% of their portfolio | 521.3k $56.4m | Added +7.1k |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.54% of their portfolio | 519.7k $56.2m | Added +166.1k |
| Fisher Asset Management, LLC 0.03% of their portfolio | 502.0k $54.3m | Reduced -4.4k |
| MORGAN STANLEY 0.01% of their portfolio | 497.8k $53.8m | Added +1.4k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 471.5k $51.0m | Added +17.6k |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. 0.47% of their portfolio | 394.5k $42.6m | Added +21.0k |
| Amundi 0.02% of their portfolio | 374.9k $40.9m | Reduced -133.7k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.02% of their portfolio | 371.8k $33.0m | Unchanged |
| AMERICAN CENTURY COMPANIES INC 0.03% of their portfolio | 371.8k $40.2m | Reduced -87.7k |
| Rafferty Asset Management, LLC 0.21% of their portfolio | 352.2k $38.1m | Added +91.4k |
| Capital Research Global Investors 0.01% of their portfolio | 314.8k $34.0m | New |
| VALUE HOLDINGS MANAGEMENT CO. LLC 7.18% of their portfolio | 297.7k $32.2m | Unchanged |
| ROYAL BANK OF CANADA 0.01% of their portfolio | 295.5k $31.9m | Added +19.9k |
| DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio | 288.5k $31.2m | Reduced -287.1k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.04% of their portfolio | 259.8k $28.1m | Added +17.1k |
| DEUTSCHE BANK AG\ 0.01% of their portfolio | 257.3k $27.8m | Reduced -40.0k |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.19% of their portfolio | 249.4k $27.0m | Added +105.1k |
| Thrivent Financial for Lutherans 0.06% of their portfolio | 238.5k $25.8m | Added +73.9k |
| FIRST TRUST ADVISORS LP 0.03% of their portfolio | 229.1k $24.8m | Reduced -12.6k |
| BARCLAYS PLC 0.01% of their portfolio | 211.8k $22.9m | Added +145.0k |
| LAZARD ASSET MANAGEMENT LLC 0.03% of their portfolio | 194.5k $21.0m | Added +46.2k |
| RHUMBLINE ADVISERS 0.02% of their portfolio | 191.4k $20.7m | Added +14.7k |
| AMERIPRISE FINANCIAL INC 0.01% of their portfolio | 180.6k $19.5m | Reduced -69.1k |
| FEDERATED HERMES, INC. 0.05% of their portfolio | 177.9k $19.2m | Reduced -467 |
| SYSTEMATIC FINANCIAL MANAGEMENT LP 0.60% of their portfolio | 177.2k $19.2m | Reduced -1.5k |
| WELLS FARGO & COMPANY/MN 0.01% of their portfolio | 172.2k $18.6m | Reduced -7.8k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 164.8k $17.8m | Reduced -186.5k |
| RAYMOND JAMES & ASSOCIATES 0.01% of their portfolio | 156.2k $16.9m | Added +7.8k |
| Harvey Partners, LLC 2.07% of their portfolio | 155.0k $16.8m | New |
| Retirement Systems of Alabama 0.07% of their portfolio | 150.1k $16.2m | Reduced -737 |
| Nuveen Asset Management, LLC 0.01% of their portfolio | 147.0k $15.9m | Added +19.7k |
| TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY 0.14% of their portfolio | 132.0k $14.3m | Added +68.1k |
| Swiss National Bank 0.01% of their portfolio | 130.6k $14.1m | Added +1.4k |
| Polar Capital Holdings Plc 0.09% of their portfolio | 127.3k $13.8m | Added +16.2k |
| BNP PARIBAS FINANCIAL MARKETS 0.03% of their portfolio | 122.1k $13.2m | Added +42.9k |
| NEEDHAM INVESTMENT MANAGEMENT LLC 2.16% of their portfolio | 121.0k $13.1m | Reduced -500 |
| CITIGROUP INC 0.02% of their portfolio | 121.0k $13.1m | Added +37.2k |
| UBS Group AG 0.00% of their portfolio | 104.6k $11.3m | Added +7.2k |
| CREDIT SUISSE AG/ 0.01% of their portfolio | 103.4k $11.2m | Added +45.4k |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 99.1k $10.7m | Added +45.5k |
| California Public Employees Retirement System 0.01% of their portfolio | 98.5k $10.7m | Reduced -18.1k |
| Mesirow Institutional Investment Management, Inc. 1.07% of their portfolio | 95.8k $10.4m | Reduced -8.3k |
| First Eagle Investment Management, LLC 0.03% of their portfolio | 95.5k $10.3m | Added +19.0k |
| FIRST NATIONAL BANK OF OMAHA 0.57% of their portfolio | 92.4k $10.0m | Reduced -208 |
| Legal & General Group Plc 0.00% of their portfolio | 89.3k $9.7m | Reduced -26.7k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 88.3k $9.5m | Added +2.8k |
| AMERICAN INTERNATIONAL GROUP, INC. 0.06% of their portfolio | 86.7k $9.4m | Reduced -1.6k |
| Walleye Capital LLC 0.15% of their portfolio | 78.0k $8.4m | Added +71.9k |
| Leith Wheeler Investment Counsel Ltd. 1.09% of their portfolio | 77.2k $8.4m | Added +4.7k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 75.4k $8.2m | Added +1.1k |
| STRS OHIO 0.03% of their portfolio | 72.3k $7.8m | Reduced -156.9k |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.02% of their portfolio | 71.1k $7.7m | Reduced -1.0k |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.27% of their portfolio | 69.3k $7.5m | Reduced -3.5k |
| NATIXIS ADVISORS, LLC 0.02% of their portfolio | 68.7k $7.4m | Added +2.6k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.02% of their portfolio | 68.1k $7.4m | Reduced -6.1k |
| Squarepoint Ops LLC 0.04% of their portfolio | 62.8k $6.8m | Added +49.9k |
| Granite Investment Partners, LLC 0.26% of their portfolio | 60.5k $6.5m | Added +29.0k |
| Rokos Capital Management LLP 0.13% of their portfolio | 60.0k $6.4m | New |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.01% of their portfolio | 58.7k $6.3m | Added +3.8k |
| STIFEL FINANCIAL CORP 0.01% of their portfolio | 55.1k $6.0m | Reduced -3.2k |
| BESSEMER GROUP INC 0.01% of their portfolio | 54.7k $5.9m | Reduced -55.6k |
| SEI INVESTMENTS CO 0.01% of their portfolio | 52.9k $5.7m | Reduced -5.4k |
| GIRARD ADVISORY SERVICES, LLC 0.60% of their portfolio | 52.9k $5.7m | Added +6.7k |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC 0.06% of their portfolio | 52.6k $5.7m | Reduced -3.7k |
| TEXAS PERMANENT SCHOOL FUND CORP 0.05% of their portfolio | 50.5k $5.5m | Reduced -758 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 48.0k $5.2m | Added +3.6k |
| Holocene Advisors, LP 0.02% of their portfolio | 47.9k $5.2m | Added +10.5k |
| GHP Investment Advisors, Inc. 0.26% of their portfolio | 47.8k $4.5m | Added +1.9k |
| WCM INVESTMENT MANAGEMENT, LLC 0.01% of their portfolio | 43.8k $4.7m | Reduced -792 |
| Crestline Management, L.P. 0.49% of their portfolio | 42.0k $4.5m | New |
| UNIVEST FINANCIAL Corp 1.37% of their portfolio | 42.0k $4.5m | Added +6.1k |
| CANADA LIFE ASSURANCE Co 0.01% of their portfolio | 42.0k $4.5m | Reduced -4.4k |
| CASTLEARK MANAGEMENT LLC 0.20% of their portfolio | 41.5k $4.5m | New |
| Monashee Investment Management LLC 1.03% of their portfolio | 40.0k $4.3m | New |
| NORDEA INVESTMENT MANAGEMENT AB 0.01% of their portfolio | 39.1k $4.2m | Added +3.9k |
| SIT INVESTMENT ASSOCIATES INC 0.11% of their portfolio | 38.4k $4.2m | Unchanged |
| AMALGAMATED BANK 0.03% of their portfolio | 38.2k $4.1m | Reduced -1.2k |