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 ($14.3m this quarter). Holder counts are more reliable. Shares outstanding: 66.7m as of 2023-03-06, 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 ≈ $88.61. Options: 11 managers hold calls ($13.9m notional), 10 hold puts ($8.9m).
Trends to Q1 2023
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 357 |
| Q4 2022 | 316 |
| Q1 2023 | 325 |
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 |
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 |
Biggest buyers
| FMR LLC | Added | +4.0m |
| PRICE T ROWE ASSOCIATES INC /MD/ | Added | +383.7k |
| Capital International Investors | Added | +351.9k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Added | +276.5k |
| Invesco Ltd. | Added | +227.3k |
| STRS OHIO | Added | +219.2k |
| VANGUARD GROUP INC | Added | +169.4k |
| BANK OF AMERICA CORP /DE/ | Added | +150.6k |
| MORGAN STANLEY | Added | +109.2k |
| AMERICAN CENTURY COMPANIES INC | Added | +85.1k |
Biggest sellers
| Amundi | Reduced | -1.0m |
| Thrivent Financial for Lutherans | Reduced | -383.5k |
| GOLDMAN SACHS GROUP INC | Reduced | -350.1k |
| COOKE & BIELER LP | Reduced | -259.0k |
| JPMORGAN CHASE & CO | Reduced | -242.9k |
| Channing Capital Management, LLC | Reduced | -221.3k |
| Pacer Advisors, Inc. | Reduced | -218.1k |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | -197.5k |
| Artemis Investment Management LLP | Sold out | -183.9k |
| Balyasny Asset Management L.P. | Reduced | -158.1k |
Biggest calls
| CITADEL ADVISORS LLC | Added | $6.6m74.2k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $2.5m28.2k shares |
| PEAK6 Investments LLC | Reduced | $1.1m11.9k shares |
| Cubist Systematic Strategies, LLC | Added | $912.8k10.3k shares |
| JANE STREET GROUP, LLC | Added | $797.6k9.0k shares |
| Walleye Trading LLC | Reduced | $549.4k6.2k shares |
| Walleye Capital LLC | New | $522.9k5.9k shares |
| TWO SIGMA SECURITIES, LLC | Added | $389.9k4.4k shares |
| SIMPLEX TRADING, LLC | Reduced | $292.0k3.3k shares |
| Twin Tree Management, LP | Unchanged | $283.6k3.2k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $2.9m32.3k shares |
| CITADEL ADVISORS LLC | Reduced | $2.8m31.6k shares |
| Twin Tree Management, LP | Reduced | $779.9k8.8k shares |
| Cubist Systematic Strategies, LLC | Added | $549.4k6.2k shares |
| Walleye Capital LLC | New | $522.9k5.9k shares |
| Walleye Trading LLC | Added | $496.3k5.6k shares |
| TWO SIGMA SECURITIES, LLC | Reduced | $372.2k4.2k shares |
| SIMPLEX TRADING, LLC | Added | $363.0k4.1k shares |
| PEAK6 Investments LLC | Reduced | $159.5k1.8k 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 Q1 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 |
|---|---|---|---|---|---|
| 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 | — |
| Q4 2022 | 0 | — | 2 | $54.6k | — |
| Q1 2023 | 0 | — | 2 | $36.8k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2023-03-15 | Moloney Jacqueline F Director | Sold | $19.5k225 shares |
| 2023-03-15 | Mora Elizabeth Director | Sold | $17.3k200 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, Q1 2023
| Manager | Shares | Change |
|---|---|---|
| Carlyle Group Inc. 22.43% of their portfolio | 8.5m $751.7m | Unchanged |
| Capital International Investors 0.16% of their portfolio | 6.9m $610.7m | Added +351.9k |
| VANGUARD GROUP INC 0.01% of their portfolio | 6.5m $577.3m | Added +169.4k |
| FMR LLC 0.02% of their portfolio | 5.5m $490.3m | Added +4.0m |
| BlackRock Inc. 0.01% of their portfolio | 5.5m $486.0m | Reduced -6.5k |
| VICTORY CAPITAL MANAGEMENT INC 0.38% of their portfolio | 3.8m $334.7m | Reduced -64.0k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.02% of their portfolio | 1.9m $166.8m | Added +383.7k |
| WELLINGTON MANAGEMENT GROUP LLP 0.03% of their portfolio | 1.7m $150.7m | Reduced -197.5k |
| NEUBERGER BERMAN GROUP LLC 0.14% of their portfolio | 1.7m $150.3m | Reduced -27.9k |
| JPMORGAN CHASE & CO 0.02% of their portfolio | 1.7m $148.0m | Reduced -242.9k |
| STATE STREET CORP 0.01% of their portfolio | 1.6m $142.7m | Added +26.6k |
| Invesco Ltd. 0.04% of their portfolio | 1.5m $134.7m | Added +227.3k |
| COOKE & BIELER LP 1.21% of their portfolio | 1.4m $124.4m | Reduced -259.0k |
| GOLDMAN SACHS GROUP INC 0.02% of their portfolio | 1.0m $90.7m | Reduced -350.1k |
| PRINCIPAL FINANCIAL GROUP INC 0.06% of their portfolio | 930.2k $82.4m | Added +68.7k |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.28% of their portfolio | 897.0k $79.5m | Added +8.8k |
| ROYCE & ASSOCIATES LP 0.79% of their portfolio | 886.2k $78.5m | Added +38.4k |
| Bank of New York Mellon Corp 0.02% of their portfolio | 864.4k $76.6m | Added +72.7k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 855.7k $75.8m | Added +11.7k |
| NORGES BANK 0.02% of their portfolio | 827.7k $73.3m | Reduced -49.9k |
| Polaris Capital Management, LLC 2.15% of their portfolio | 650.8k $57.7m | Added +69.2k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 575.6k $51.0m | Reduced -9.1k |
| Madison Asset Management, LLC 0.76% of their portfolio | 567.9k $50.3m | Added +23.4k |
| Channing Capital Management, LLC 1.55% of their portfolio | 544.2k $48.2m | Reduced -221.3k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 514.2k $45.6m | Added +3.6k |
| Amundi 0.02% of their portfolio | 508.7k $42.8m | Reduced -1.0m |
| Fisher Asset Management, LLC 0.03% of their portfolio | 506.4k $44.9m | Reduced -3.8k |
| MORGAN STANLEY 0.00% of their portfolio | 496.4k $44.0m | Added +109.2k |
| AMERICAN CENTURY COMPANIES INC 0.03% of their portfolio | 459.5k $40.7m | Added +85.1k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 454.0k $40.2m | Reduced -45 |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. 0.41% of their portfolio | 373.5k $33.1m | Reduced -9.4k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.02% of their portfolio | 371.8k $33.0m | Added +276.5k |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.32% of their portfolio | 353.6k $31.3m | Reduced -83.3k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 351.3k $31.1m | Added +150.6k |
| VALUE HOLDINGS MANAGEMENT CO. LLC 6.27% of their portfolio | 297.7k $26.4m | Reduced -8.0k |
| DEUTSCHE BANK AG\ 0.01% of their portfolio | 297.3k $26.4m | Reduced -18.8k |
| ROYAL BANK OF CANADA 0.01% of their portfolio | 275.6k $24.4m | Added +30.7k |
| Rafferty Asset Management, LLC 0.16% of their portfolio | 260.8k $23.1m | Added +17.2k |
| AMERIPRISE FINANCIAL INC 0.01% of their portfolio | 249.7k $22.2m | Reduced -28.3k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.03% of their portfolio | 242.7k $21.5m | Reduced -30.6k |
| FIRST TRUST ADVISORS LP 0.02% of their portfolio | 241.7k $21.4m | Reduced -23.9k |
| STRS OHIO 0.03% of their portfolio | 229.3k $20.3m | Added +219.2k |
| RENAISSANCE TECHNOLOGIES LLC 0.03% of their portfolio | 229.2k $20.3m | Reduced -109.3k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 180.0k $16.0m | Added +14.3k |
| SYSTEMATIC FINANCIAL MANAGEMENT LP 0.52% of their portfolio | 178.7k $15.8m | Reduced -15.5k |
| FEDERATED HERMES, INC. 0.04% of their portfolio | 178.4k $15.8m | Reduced -179 |
| RHUMBLINE ADVISERS 0.02% of their portfolio | 176.8k $15.7m | Reduced -2.0k |
| Thrivent Financial for Lutherans 0.04% of their portfolio | 164.6k $14.6m | Reduced -383.5k |
| Retirement Systems of Alabama 0.06% of their portfolio | 150.8k $13.4m | Reduced -16.1k |
| RAYMOND JAMES & ASSOCIATES 0.01% of their portfolio | 148.4k $13.2m | Added +18.3k |
| LAZARD ASSET MANAGEMENT LLC 0.02% of their portfolio | 148.2k $13.1m | Reduced -47.1k |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.10% of their portfolio | 144.3k $12.8m | Reduced -9.8k |
| Swiss National Bank 0.01% of their portfolio | 129.2k $11.4m | Reduced -15.3k |
| Nuveen Asset Management, LLC 0.00% of their portfolio | 127.2k $11.3m | Reduced -3.1k |
| TWO SIGMA INVESTMENTS, LP 0.03% of their portfolio | 123.5k $10.9m | Reduced -36.6k |
| NEEDHAM INVESTMENT MANAGEMENT LLC 1.86% of their portfolio | 121.5k $10.8m | Reduced -18.0k |
| California Public Employees Retirement System 0.01% of their portfolio | 116.6k $10.3m | Reduced -15.3k |
| Legal & General Group Plc 0.00% of their portfolio | 116.0k $10.3m | Added +6.0k |
| Polar Capital Holdings Plc 0.07% of their portfolio | 111.1k $9.8m | Reduced -1.4k |
| BESSEMER GROUP INC 0.02% of their portfolio | 110.4k $9.8m | Added +804 |
| Mesirow Institutional Investment Management, Inc. 1.00% of their portfolio | 104.1k $9.2m | Reduced -13.3k |
| UBS Group AG 0.00% of their portfolio | 97.4k $8.6m | Added +60.9k |
| FIRST NATIONAL BANK OF OMAHA 0.50% of their portfolio | 92.6k $8.2m | Reduced -500 |
| AMERICAN INTERNATIONAL GROUP, INC. 0.05% of their portfolio | 88.3k $7.8m | Reduced -827 |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 85.5k $7.6m | Reduced -130.8k |
| CITIGROUP INC 0.01% of their portfolio | 83.7k $7.4m | Added +15.7k |
| BNP PARIBAS FINANCIAL MARKETS 0.02% of their portfolio | 79.2k $7.0m | Added +53.6k |
| First Eagle Investment Management, LLC 0.02% of their portfolio | 76.5k $6.8m | Added +9.7k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 74.3k $6.6m | Reduced -1.0k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.02% of their portfolio | 74.2k $6.6m | Reduced -6.7k |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.15% of their portfolio | 72.8k $6.4m | Reduced -6.4k |
| Leith Wheeler Investment Counsel Ltd. 0.94% of their portfolio | 72.5k $6.4m | Added +480 |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 72.1k $6.4m | Unchanged |
| HRT FINANCIAL LP 0.08% of their portfolio | 70.2k $6.2m | New |
| BARCLAYS PLC 0.01% of their portfolio | 66.8k $5.9m | Added +18.8k |
| NATIXIS ADVISORS, LLC 0.02% of their portfolio | 66.1k $5.9m | Added +5.9k |
| TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY 0.06% of their portfolio | 63.9k $5.7m | Added +41.9k |
| SEI INVESTMENTS CO 0.01% of their portfolio | 58.3k $5.2m | Reduced -1.6k |
| STIFEL FINANCIAL CORP 0.01% of their portfolio | 58.3k $5.2m | Reduced -10.4k |
| CREDIT SUISSE AG/ 0.01% of their portfolio | 58.1k $5.1m | Added +1.2k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio | 57.9k $5.1m | New |
| Qube Research & Technologies Ltd 0.03% of their portfolio | 56.9k $5.0m | New |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC 0.06% of their portfolio | 56.3k $5.0m | Reduced -1.1k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 55.0k $4.9m | Added +4.3k |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.01% of their portfolio | 54.9k $4.9m | Reduced -380 |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 53.6k $4.7m | Added +52.3k |
| TEXAS PERMANENT SCHOOL FUND CORP 0.05% of their portfolio | 51.2k $4.5m | Added +12.8k |
| CANADA LIFE ASSURANCE Co 0.01% of their portfolio | 46.4k $4.1m | Reduced -315 |
| GIRARD ADVISORY SERVICES, LLC 0.45% of their portfolio | 46.2k $4.1m | Added +16.1k |
| GHP Investment Advisors, Inc. 0.26% of their portfolio | 45.9k $4.1m | Added +146 |
| TWO SIGMA ADVISERS, LP 0.01% of their portfolio | 45.6k $4.0m | Added +18.0k |
| WCM INVESTMENT MANAGEMENT, LLC 0.01% of their portfolio | 44.5k $3.9m | Added +274 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 44.4k $3.9m | Reduced -1.9k |
| NFJ INVESTMENT GROUP, LLC 0.10% of their portfolio | 43.9k $3.9m | Reduced -1.4k |
| Curi Capital, LLC 0.12% of their portfolio | 40.1k $3.5m | Reduced -586 |
| AMALGAMATED BANK 0.03% of their portfolio | 39.4k $3.5m | Reduced -9.0k |
| State of Tennessee, Department of Treasury 0.02% of their portfolio | 38.4k $3.4m | Reduced -2.5k |
| SIT INVESTMENT ASSOCIATES INC 0.09% of their portfolio | 38.4k $3.4m | Unchanged |
| JANE STREET GROUP, LLC 0.01% of their portfolio | 38.3k $3.4m | Added +20.8k |
| Holocene Advisors, LP 0.02% of their portfolio | 37.4k $3.3m | Reduced -2.9k |