Mks's three largest insider shareholders as of March 23, 2026 are Partners Vi Cayman Holdings, L.P. Carlyle (TenPercentOwner, 6.48Mn shares), Group Inc. Carlyle (TenPercentOwner, 6.48Mn shares), John Tseng-Chung Lee (President Ceo, 154.70K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Group Inc. Carlyle | 0 | 6,482,732 | 10 May, 2023 | |
| James Alan Schreiner | Evp Coo | 23,402 | 0 | 25 Feb, 2026 |
| Elizabeth Mora | 18,663 | 0 | 03 Mar, 2026 | |
| Eric Robert Taranto | Evp Gm, Vsd | 15,445 | 0 | 09 Mar, 2026 |
| Michelle M Warner | 10,852 | 0 | 08 May, 2024 | |
| Jacqueline F Moloney | 10,393 | 0 | 13 Mar, 2026 | |
| Ramakumar Mayampurath | Evp Cfo | 8,811 | 0 | 18 Feb, 2026 |
| John Edward Williams | Evp Gm, Psd | 3,640 | 0 | 23 Feb, 2026 |
| Geoffrey Wild | 1,813 | 0 | 18 Aug, 2022 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 12 Mar, 2026 | Jacqueline F Moloney | Common Stock | D | 340 | $213.77 | 10,393 | D | S |
| 06 Mar, 2026 | Eric Robert Taranto | Common Stock | D | 4,568 | $220.52 | 15,445 | D | S |
| 02 Mar, 2026 | Elizabeth Mora | Common Stock | D | 300 | $239.44 | 18,663 | D | S |
| 24 Feb, 2026 | James Alan Schreiner | Common Stock | D | 4,100 | $255.00 | 23,402 | D | S |
| 20 Feb, 2026 | Eric Robert Taranto | Common Stock | D | 1,453 | $247.55 | 20,013 | D | S |
| 20 Feb, 2026 | John Edward Williams | Common Stock | D | 2,043 | $256.41 | 3,640 | D | S |
| 20 Feb, 2026 | Jacqueline F Moloney | Common Stock | D | 829 | $247.55 | 10,733 | D | S |
| 20 Feb, 2026 | Michelle M Mccarthy | Common Stock | D | 650 | $249.57 | 816 | D | S |
| 20 Feb, 2026 | Michelle M Mccarthy | Common Stock | D | 816 | $250.35 | 0 | D | S |
| 17 Feb, 2026 | John Edward Williams | Common Stock | A | 300 | - | 3,940 | D | M |
| 17 Feb, 2026 | James Alan Schreiner | Common Stock | A | 2,567 | - | 25,187 | D | M |
| 17 Feb, 2026 | Eric Robert Taranto | Common Stock | A | 1,764 | - | 19,468 | D | M |
| 17 Feb, 2026 | Ramakumar Mayampurath | Common Stock | A | 2,958 | - | 8,625 | D | M |
| 17 Feb, 2026 | Ramakumar Mayampurath | Common Stock | A | 2,702 | - | 11,327 | D | M |
| 17 Feb, 2026 | Eric Robert Taranto | Common Stock | A | 914 | - | 20,382 | D | M |
| 17 Feb, 2026 | James Alan Schreiner | Common Stock | A | 1,330 | - | 26,517 | D | M |
| 17 Feb, 2026 | John Edward Williams | Common Stock | A | 841 | - | 4,781 | D | M |
| 17 Feb, 2026 | James Alan Schreiner | Common Stock | A | 432 | - | 26,950 | D | M |
| 17 Feb, 2026 | Ramakumar Mayampurath | Common Stock | D | 2,516 | $260.74 | 8,811 | D | F |
| 17 Feb, 2026 | Eric Robert Taranto | Common Stock | A | 348 | - | 20,731 | D | M |