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 ($2.9m this quarter). Holder counts are more reliable. Shares outstanding: 66.9m as of 2023-11-06, 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 ≈ $102.87. Options: 9 managers hold calls ($20.9m notional), 13 hold puts ($11.6m).
Trends to Q4 2023
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 357 |
| Q4 2022 | 316 |
| Q1 2023 | 325 |
| Q2 2023 | 321 |
| Q3 2023 | 324 |
| Q4 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 |
| Q2 2023 | 161 | 156 |
| Q3 2023 | 168 | 135 |
| Q4 2023 | 153 | 164 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q1 2023 | $13.9m | $8.9m | 0.64 |
| Q2 2023 | $22.3m | $11.9m | 0.53 |
| Q3 2023 | $13.1m | $12.9m | 0.99 |
| Q4 2023 | $20.9m | $11.6m | 0.56 |
Biggest buyers
| PRICE T ROWE ASSOCIATES INC /MD/ | Added | +3.3m |
| JPMORGAN CHASE & CO | Added | +1.5m |
| NORDEA INVESTMENT MANAGEMENT AB | Added | +840.3k |
| WESTFIELD CAPITAL MANAGEMENT CO LP | New | +589.7k |
| FMR LLC | Added | +586.6k |
| VICTORY CAPITAL MANAGEMENT INC | Added | +581.5k |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | New | +239.9k |
| Invesco Ltd. | Added | +226.4k |
| Aperture Investors, LLC | New | +217.3k |
| Ceredex Value Advisors LLC | New | +204.7k |
Biggest sellers
| Carlyle Group Inc. | Sold out | -3.5m |
| Capital International Investors | Reduced | -1.7m |
| NEUBERGER BERMAN GROUP LLC | Reduced | -654.5k |
| Channing Capital Management, LLC | Sold out | -639.9k |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. | Sold out | -399.4k |
| GOLDMAN SACHS GROUP INC | Reduced | -360.1k |
| AMERICAN CENTURY COMPANIES INC | Reduced | -146.3k |
| Walleye Capital LLC | Sold out | -141.8k |
| RENAISSANCE TECHNOLOGIES LLC | Sold out | -140.7k |
| Mesirow Institutional Investment Management, Inc. | Sold out | -132.8k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $6.8m66.5k shares |
| CITADEL ADVISORS LLC | Added | $5.7m55.8k shares |
| Cubist Systematic Strategies, LLC | Added | $2.9m27.8k shares |
| Walleye Trading LLC | Reduced | $1.5m14.2k shares |
| SIMPLEX TRADING, LLC | Added | $1.4m13.5k shares |
| PEAK6 Investments LLC | New | $1.3m12.5k shares |
| Walleye Capital LLC | Added | $997.8k9.7k shares |
| JANE STREET GROUP, LLC | Reduced | $298.3k2.9k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| Parallax Volatility Advisers, L.P. | New | $2.9m27.8k shares |
| CITADEL ADVISORS LLC | Reduced | $1.8m17.3k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $1.7m17.0k shares |
| Walleye Capital LLC | Added | $1.7m16.4k shares |
| Walleye Trading LLC | Added | $1.1m11.1k shares |
| Cubist Systematic Strategies, LLC | Reduced | $895.0k8.7k shares |
| SIMPLEX TRADING, LLC | Added | $524.0k5.1k shares |
| PEAK6 Investments LLC | New | $267.5k2.6k shares |
| JANE STREET GROUP, LLC | Reduced | $246.9k2.4k shares |
| TWO SIGMA SECURITIES, LLC | New | $216.0k2.1k 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 Q4 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 |
|---|---|---|---|---|---|
| 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 |
| Q3 2023 | 0 | — | 5 | $4.7m | $1.0m |
| Q4 2023 | 1 | $170.8k | 2 | $42.3k | $42.3k |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2023-12-01 | Moloney Jacqueline F Director | Sold plan | $20.6k250 shares |
| 2023-11-07 | Henry David Philip EVP, Operations & Corp Mktg | Bought | $170.8k2.5k shares |
| 2023-10-02 | Mora Elizabeth Director | Sold plan | $21.8k250 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, Q4 2023
| Manager | Shares | Change |
|---|---|---|
| PRICE T ROWE ASSOCIATES INC /MD/ 0.11% of their portfolio | 8.1m $831.6m | Added +3.3m |
| VANGUARD GROUP INC 0.02% of their portfolio | 6.9m $709.1m | Added +39.0k |
| BlackRock Inc. 0.02% of their portfolio | 6.2m $635.6m | Added +80.9k |
| VICTORY CAPITAL MANAGEMENT INC 0.49% of their portfolio | 4.5m $462.0m | Added +581.5k |
| FMR LLC 0.03% of their portfolio | 4.1m $416.7m | Added +586.6k |
| Capital International Investors 0.08% of their portfolio | 3.7m $377.5m | Reduced -1.7m |
| JPMORGAN CHASE & CO 0.01% of their portfolio | 2.8m $288.0m | Added +1.5m |
| WELLINGTON MANAGEMENT GROUP LLP 0.05% of their portfolio | 2.6m $265.1m | Reduced -125.0k |
| Invesco Ltd. 0.06% of their portfolio | 2.3m $241.3m | Added +226.4k |
| STATE STREET CORP 0.01% of their portfolio | 1.8m $188.1m | Added +61.8k |
| Bank of New York Mellon Corp 0.02% of their portfolio | 1.2m $122.4m | Reduced -25.5k |
| COOKE & BIELER LP 1.05% of their portfolio | 1.2m $119.1m | Added +27.6k |
| NORGES BANK 0.02% of their portfolio | 1.1m $117.7m | Reduced -13.8k |
| ROYCE & ASSOCIATES LP 1.06% of their portfolio | 1.1m $115.2m | Added +159.7k |
| GOLDMAN SACHS GROUP INC 0.02% of their portfolio | 1.1m $108.3m | Reduced -360.1k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 1.0m $106.8m | Added +31.9k |
| NEUBERGER BERMAN GROUP LLC 0.09% of their portfolio | 1.0m $104.1m | Reduced -654.5k |
| PRINCIPAL FINANCIAL GROUP INC 0.06% of their portfolio | 901.2k $92.7m | Reduced -32.6k |
| NORDEA INVESTMENT MANAGEMENT AB 0.11% of their portfolio | 880.9k $90.4m | Added +840.3k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.02% of their portfolio | 597.3k $61.4m | Added +10.5k |
| WESTFIELD CAPITAL MANAGEMENT CO LP 0.35% of their portfolio | 589.7k $60.7m | New |
| Madison Asset Management, LLC 0.81% of their portfolio | 578.6k $59.5m | Added +4.1k |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.57% of their portfolio | 545.5k $56.1m | Added +91.0k |
| Polaris Capital Management, LLC 2.65% of their portfolio | 534.0k $54.9m | Added +72.7k |
| MORGAN STANLEY 0.00% of their portfolio | 533.4k $54.9m | Added +194.1k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 483.9k $49.8m | Added +3.2k |
| Fisher Asset Management, LLC 0.02% of their portfolio | 456.0k $46.9m | Reduced -28.5k |
| Rafferty Asset Management, LLC 0.17% of their portfolio | 399.5k $41.1m | Added +52.5k |
| Capital Research Global Investors 0.01% of their portfolio | 387.2k $39.8m | Unchanged |
| Amundi 0.02% of their portfolio | 362.1k $37.4m | Added +39.3k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 324.9k $33.4m | Added +103.8k |
| BARCLAYS PLC 0.02% of their portfolio | 318.3k $32.7m | Added +130.4k |
| Thrivent Financial for Lutherans 0.07% of their portfolio | 301.5k $31.0m | Added +15.2k |
| VALUE HOLDINGS MANAGEMENT CO. LLC 6.19% of their portfolio | 297.7k $30.6m | Unchanged |
| ROYAL BANK OF CANADA 0.01% of their portfolio | 284.6k $29.3m | Added +63.9k |
| DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio | 246.8k $25.4m | Reduced -16.9k |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC 1.34% of their portfolio | 239.9k $24.7m | New |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.17% of their portfolio | 235.6k $24.2m | Reduced -19.9k |
| DEUTSCHE BANK AG\ 0.01% of their portfolio | 229.6k $23.6m | Reduced -4.8k |
| UBS Group AG 0.01% of their portfolio | 229.4k $23.6m | Added +110.4k |
| AMERIPRISE FINANCIAL INC 0.01% of their portfolio | 227.7k $23.4m | Added +53.5k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.01% of their portfolio | 219.9k $22.6m | Added +30.5k |
| Aperture Investors, LLC 3.94% of their portfolio | 217.3k $22.4m | New |
| AMERICAN CENTURY COMPANIES INC 0.02% of their portfolio | 215.7k $22.2m | Reduced -146.3k |
| Ceredex Value Advisors LLC 0.36% of their portfolio | 204.7k $21.1m | New |
| Balyasny Asset Management L.P. 0.06% of their portfolio | 195.2k $20.1m | Added +149.6k |
| RHUMBLINE ADVISERS 0.02% of their portfolio | 190.2k $19.6m | Reduced -9.2k |
| NEEDHAM INVESTMENT MANAGEMENT LLC 2.43% of their portfolio | 187.0k $19.2m | Added +30.0k |
| WELLS FARGO & COMPANY/MN 0.01% of their portfolio | 180.3k $18.5m | Added +10.0k |
| BNP PARIBAS FINANCIAL MARKETS 0.03% of their portfolio | 174.8k $18.0m | Added +47.7k |
| SYSTEMATIC FINANCIAL MANAGEMENT LP 0.52% of their portfolio | 171.1k $17.6m | Reduced -4.7k |
| RAYMOND JAMES & ASSOCIATES 0.01% of their portfolio | 158.0k $16.3m | Added +3.2k |
| Retirement Systems of Alabama 0.07% of their portfolio | 154.8k $15.9m | Added +260 |
| Harvey Partners, LLC 1.80% of their portfolio | 149.5k $15.4m | Reduced -15.0k |
| Polar Capital Holdings Plc 0.09% of their portfolio | 149.4k $15.4m | Added +26.4k |
| Nuveen Asset Management, LLC 0.00% of their portfolio | 147.4k $15.2m | Reduced -1.8k |
| First Eagle Investment Management, LLC 0.04% of their portfolio | 144.1k $14.8m | Added +9.4k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.02% of their portfolio | 141.0k $14.5m | Reduced -119.3k |
| LAZARD ASSET MANAGEMENT LLC 0.02% of their portfolio | 136.4k $14.0m | Reduced -2.4k |
| JANE STREET GROUP, LLC 0.02% of their portfolio | 125.5k $12.9m | Added +88.4k |
| Swiss National Bank 0.01% of their portfolio | 125.2k $12.9m | Reduced -6.9k |
| Squarepoint Ops LLC 0.05% of their portfolio | 124.4k $12.8m | Added +113.8k |
| LOOMIS SAYLES & CO L P 0.02% of their portfolio | 122.8k $12.6m | New |
| California Public Employees Retirement System 0.01% of their portfolio | 113.8k $11.7m | Reduced -109 |
| CREDIT SUISSE AG/ 0.01% of their portfolio | 109.6k $11.3m | Added +8.0k |
| PointState Capital LP 0.36% of their portfolio | 98.5k $10.1m | New |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 96.8k $10.0m | Reduced -38.0k |
| Legal & General Group Plc 0.00% of their portfolio | 95.5k $9.8m | Added +3.0k |
| CITIGROUP INC 0.01% of their portfolio | 93.2k $9.6m | Reduced -37.5k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 92.6k $9.5m | Added +1.1k |
| FIRST NATIONAL BANK OF OMAHA 0.56% of their portfolio | 87.0k $9.0m | Added +2.5k |
| EAGLE ASSET MANAGEMENT INC 0.05% of their portfolio | 86.6k $8.9m | Added +74.1k |
| COMERICA BANK 0.04% of their portfolio | 86.4k $8.9m | Added +58.0k |
| AMERICAN INTERNATIONAL GROUP, INC. 0.04% of their portfolio | 84.9k $8.7m | Reduced -3.6k |
| STRS OHIO 0.04% of their portfolio | 82.5k $8.5m | Reduced -12.9k |
| MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio | 78.5k $8.1m | Reduced -52.5k |
| Leith Wheeler Investment Counsel Ltd. 0.87% of their portfolio | 77.2k $7.9m | Reduced -1.0k |
| BESSEMER GROUP INC 0.01% of their portfolio | 72.9k $7.5m | Added +15.8k |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.02% of their portfolio | 71.1k $7.3m | Added +100 |
| Granite Investment Partners, LLC 0.28% of their portfolio | 69.7k $7.2m | Added +12.5k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 68.1k $7.0m | Reduced -132 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.01% of their portfolio | 65.3k $6.7m | Added +8.9k |
| JANUS HENDERSON GROUP PLC 0.00% of their portfolio | 61.4k $6.3m | Added +34.5k |
| Holocene Advisors, LP 0.02% of their portfolio | 59.3k $6.1m | Reduced -20.7k |
| BANK OF MONTREAL /CAN/ 0.00% of their portfolio | 59.3k $6.2m | Added +49.5k |
| GIRARD ADVISORY SERVICES, LLC 0.58% of their portfolio | 55.3k $5.7m | Added +848 |
| STIFEL FINANCIAL CORP 0.01% of their portfolio | 55.2k $5.7m | Reduced -142 |
| Roubaix Capital, LLC 3.91% of their portfolio | 54.3k $5.6m | Added +30.3k |
| TEXAS PERMANENT SCHOOL FUND CORP 0.05% of their portfolio | 54.2k $5.6m | Added +880 |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC 0.06% of their portfolio | 53.3k $5.5m | Added +1.6k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 51.6k $5.3m | Reduced -1.4k |
| Allianz Asset Management GmbH 0.01% of their portfolio | 50.6k $5.2m | New |
| WCM INVESTMENT MANAGEMENT, LLC 0.01% of their portfolio | 49.6k $5.2m | Added +5.8k |
| GREAT LAKES ADVISORS, LLC 0.05% of their portfolio | 49.3k $5.1m | New |
| SEI INVESTMENTS CO 0.01% of their portfolio | 48.4k $5.0m | Reduced -5.4k |
| NFJ INVESTMENT GROUP, LLC 0.14% of their portfolio | 48.2k $5.0m | Added +10.2k |
| GHP Investment Advisors, Inc. 0.26% of their portfolio | 47.5k $4.9m | Reduced -1.1k |
| CANADA LIFE ASSURANCE Co 0.01% of their portfolio | 46.2k $4.7m | Reduced -1.3k |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 40.7k $4.2m | Added +9.5k |
| VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 40.7k $4.2m | Added +32.3k |