Mks's top three insider shareholders as of September 09, 2026 are Partners Vi Cayman Holdings, L.P. Carlyle (TenPercentOwner, 6.48Mn shares), Partners Vi Cayman Holdings, L.P. Carlyle (TenPercentOwner, 6.48Mn shares), Partners Vi Cayman Holdings, L.P. Carlyle (TenPercentOwner, 6.48Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Group Inc. Carlyle | TenPercentOwner | 0 | 6,482,732 | 6,482,732 | 48.7% | 10 May, 2023 |
| 2 | Partners Vi Cayman Holdings, L.P. Carlyle | TenPercentOwner | 0 | 6,482,732 | 6,482,732 | 48.7% | 10 May, 2023 |
| 3 | John Tseng-Chung Lee | President Ceo | 134,776 | 0 | 134,776 | 1.0% | 17 Aug, 2026 |
| 4 | Kathleen Flaherty Burke | Evp, Gc Secretary | 49,439 | 0 | 49,439 | 0.4% | 12 May, 2026 |
| 5 | Gerald G Colella | Director | 0 | 20,017 | 20,017 | 0.2% | 28 May, 2026 |
| 6 | James Alan Schreiner | Evp Coo | 19,201 | 0 | 19,201 | 0.1% | 16 Jun, 2026 |
| 7 | Elizabeth Mora | Director | 18,845 | 0 | 18,845 | 0.1% | 02 Sep, 2026 |
| 8 | Raj Batra | Director | 16,227 | 0 | 16,227 | 0.1% | 12 May, 2026 |
| 9 | Mark Milton Gitin | Evp Gm, Psd | 16,134 | 0 | 16,134 | 0.1% | 16 Feb, 2024 |
| 10 | Eric Robert Taranto | Evp Gm, Vsd | 12,596 | 0 | 12,596 | 0.1% | 12 May, 2026 |
| 11 | Michelle M Warner | Director | 10,852 | 0 | 10,852 | 0.1% | 08 May, 2024 |
| 12 | David Philip Henry | Evp, Global Str Mktg Gm, Msd | 10,422 | 0 | 10,422 | 0.1% | 02 Jun, 2026 |
| 13 | Joseph B Donahue | Director | 10,033 | 0 | 10,033 | 0.1% | 28 May, 2026 |
| 14 | Jacqueline F Moloney | Director | 8,775 | 0 | 8,775 | 0.1% | 15 May, 2026 |
| 15 | Peter Iii Cannone | Director | 7,794 | 0 | 7,794 | 0.1% | 19 May, 2026 |
| 16 | Wissam G Jabre | Director | 5,270 | 0 | 5,270 | 0.0% | 12 May, 2026 |
| 17 | John Edward Williams | Evp Gm, Psd | 4,098 | 0 | 4,098 | 0.0% | 04 Aug, 2026 |
| 18 | Geoffrey Wild | Director | 1,813 | 0 | 1,813 | 0.0% | 18 Aug, 2022 |
| 19 | Michelle M Mccarthy | Svp Chief Accounting Officer | 2 | 0 | 2 | 0.0% | 08 Jun, 2026 |
| 20 | Ramakumar Mayampurath | Evp Cfo | 1 | 0 | 1 | 0.0% | 26 May, 2026 |
| 21 | Seth H Bagshaw | Evp, Cfo Treasurer | 1 | 0 | 1 | 0.0% | 26 Feb, 2024 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 17 Aug, 2026 | Renee Martel Donlan | Evp, Gc Cco | Acquired A | 954 | — | — | 4,781 | Direct |
| 03 Aug, 2026 | John Edward Williams | Evp Gm, Psd | Disposed S | 457 | $288.31 | $131.76K | 4,098 | Direct |
| 10 Jun, 2026 | James Alan Schreiner | Evp Coo | Disposed S | 781 | $317.42 | $247.91K | 22,701 | Direct |
| 05 Jun, 2026 | Michelle M Mccarthy | Svp Chief Accounting Officer | Disposed S | 2,434 | $315.23 | $767.27K | 2 | Direct |
| 01 Jun, 2026 | David Philip Henry | Evp, Global Str Mktg Gm, Msd | Disposed S | 6,000 | $314.43 | $1.89Mn | 10,422 | Direct |
| 27 May, 2026 | Joseph B Donahue | Director | Disposed S | 2,100 | $327.95 | $688.70K | 10,033 | Direct |
| 27 May, 2026 | Gerald G Colella | Director | Disposed S | 464 | $330.38 | $153.30K | 39,553 | Indirect |
| 27 May, 2026 | Gerald G Colella | Director | Disposed S | 8,210 | $331.45 | $2.72Mn | 31,343 | Indirect |
| 27 May, 2026 | Gerald G Colella | Director | Disposed S | 4,876 | $332.04 | $1.62Mn | 26,467 | Indirect |
| 27 May, 2026 | Gerald G Colella | Director | Disposed S | 1,811 | $335.46 | $607.51K | 24,656 | Indirect |
| 27 May, 2026 | Gerald G Colella | Director | Disposed S | 1,626 | $336.54 | $547.22K | 23,030 | Indirect |
| 27 May, 2026 | Gerald G Colella | Director | Disposed S | 213 | $337.05 | $71.79K | 22,817 | Indirect |
| 27 May, 2026 | Gerald G Colella | Director | Disposed S | 2,800 | $338.58 | $948.02K | 20,017 | Indirect |
| 26 May, 2026 | David Philip Henry | Evp, Global Str Mktg Gm, Msd | Disposed S | 2,500 | $330.50 | $826.25K | 16,341 | Direct |
| 22 May, 2026 | Ramakumar Mayampurath | Evp Cfo | Disposed S | 8,810 | $315.48 | $2.78Mn | 1 | Direct |
| 18 May, 2026 | Peter Iii Cannone | Director | Disposed S | 1,350 | $303.40 | $409.59K | 7,794 | Direct |
| 14 May, 2026 | Jacqueline F Moloney | Director | Disposed S | 1,000 | $312.20 | $312.20K | 8,775 | Direct |
| 13 May, 2026 | Jacqueline F Moloney | Director | Disposed S | 1,400 | $318.99 | $446.59K | 9,775 | Direct |
| 11 May, 2026 | Eric Robert Taranto | Evp Gm, Vsd | Disposed S | 2,849 | $319.93 | $911.33K | 12,596 | Direct |
| 11 May, 2026 | Gerald G Colella | Director | Acquired A | 782 | — | — | 8,999 | Direct |