Over the 90-day window ending January 10, 2026, Avantor's three dominant insider ownership positions are held by President & Ceo Michael Stubblefield (1.76Mn shares), Director Rajiv Gupta (1.14Mn shares), Director Jo Natauri (650.32K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Michael Stubblefield | President & Ceo | 1,764,513 | 21 May, 2025 |
| Rajiv Gupta | 1,136,780 | 05 Apr, 2022 | |
| Jo Natauri | 650,317 | 13 May, 2021 | |
| Gregory L Summe | 358,111 | 12 May, 2025 | |
| Sanjeev K Mehra | 358,106 | 09 Dec, 2025 | |
| Emmanuel Ligner | President And Ceo | 283,424 | 17 Nov, 2025 |
| R. Brent Jones | Evp And Chief Financial Officer | 269,676 | 12 May, 2025 |
| Benoit Gourdier | Evp And Bioscience Production | 235,684 | 03 Oct, 2025 |
| Corey Walker | President Laboratory Solutions | 231,271 | 24 Jun, 2025 |
| Jonathan M Peacock | 219,815 | 12 May, 2025 | |
| Christophe Couturier | Evp And Amea | 211,271 | 12 Aug, 2025 |
| Claudius Sokenu | Evp And Chief Legal & Compliance | 177,106 | 25 Jul, 2025 |
| Brittany Hankamer | Evp And Chief Hr Officer | 171,563 | 15 Aug, 2025 |
| Frederic Vanderhaegen | Evp And Americas And Europe | 160,735 | 28 Aug, 2023 |
| Devashish Ohri | Evp And Imea | 139,095 | 28 May, 2021 |
| Thomas A Szlosek | Evp & Cfo | 113,157 | 19 May, 2023 |
| Michael Wondrasch | Evp & Cio | 96,072 | 22 Feb, 2023 |
| Justin Miller | Evp & General Counsel | 93,336 | 19 May, 2023 |
| Gerard Brophy | Evp And Biopharma Production | 89,032 | 19 May, 2023 |
| James Bramwell | Evp Sales And Customer Excellence | 86,605 | 28 Feb, 2025 |
| Sheri Lewis | Evp And Global Ops & Supply Chain | 70,692 | 03 Jan, 2024 |
| Randy Lee Stone | Evp And Laboratory Solutions | 68,105 | 18 Apr, 2024 |
| Juan Andres | 65,480 | 12 May, 2025 | |
| Michael Severino | 60,551 | 12 May, 2025 | |
| Steven W Eck | Svp & Chief Accounting Officer | 55,068 | 06 Aug, 2025 |
| Lan Kang | 52,315 | 12 May, 2025 | |
| Joseph R Massaro | 52,138 | 12 May, 2025 | |
| John Carethers | 45,858 | 12 May, 2025 | |
| Mala Murthy | 44,209 | 12 May, 2025 | |
| Kitty Sahin | Evp And Strategy&Corp Development | 42,274 | 22 Jul, 2024 |
| Meghan Henson | Evp And Chief Hr Officer | 40,184 | 27 Feb, 2023 |
| Christi Shaw | 36,271 | 15 May, 2023 | |
| Louise Makin | 21,870 | 12 May, 2025 | |
| Mark Christopher Murray | Evp And Biomaterials & At | 18,680 | 18 Jan, 2022 |
| Mary Blenn | Evp And Chief Operating Officer | 17,391 | 12 Nov, 2025 |
| Gregory T Lucier | 8,736 | 07 Oct, 2025 | |
| Matthew S. Holt | 7,908 | 16 May, 2022 | |
| Simon Dingemans | 6,225 | 12 Jan, 2026 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 02 Jan, 2026 | Simon Dingemans | Common Stock | A | 6,225 | $0.00 | 6,225 | D | A |
| 05 Dec, 2025 | Sanjeev K Mehra | - | - | 8,106 | D | |||
| 05 Dec, 2025 | Sanjeev K Mehra | Common Stock | A | 350,000 | $11.09 | 350,000 | I | P |
| 05 Dec, 2025 | Sanjeev K Mehra | Common Stock | A | 8,106 | $0.00 | 8,106 | D | A |
| 05 Dec, 2025 | Sanjeev K Mehra | - | - | 350,000 | I | |||
| 17 Nov, 2025 | Emmanuel Ligner | Common Stock | A | 87,500 | $11.35 | 283,424 | D | P |
| 17 Nov, 2025 | Emmanuel Ligner | - | - | 283,424 | D | |||
| 10 Nov, 2025 | Mary Blenn | - | - | 17,391 | D | |||
| 10 Nov, 2025 | Mary Blenn | Common Stock | A | 17,391 | $0.00 | 17,391 | D | A |
| 30 Oct, 2025 | Gregory L Summe | Common Stock | A | 100,000 | $11.25 | 300,000 | I | P |
| 30 Oct, 2025 | Gregory L Summe | - | - | 300,000 | I | |||
| 03 Oct, 2025 | Gregory T Lucier | Common Stock | A | 8,736 | $0.00 | 8,736 | D | A |
| 03 Oct, 2025 | Gregory T Lucier | - | - | 8,736 | D | |||
| 02 Oct, 2025 | Benoit Gourdier | - | - | 235,684 | D | |||
| 02 Oct, 2025 | Benoit Gourdier | Common Stock | D | 1,264 | $13.77 | 235,684 | D | F |
| 21 Aug, 2025 | Gregory L Summe | Common Stock | A | 100,000 | $12.56 | 200,000 | I | P |
| 18 Aug, 2025 | Emmanuel Ligner | Common Stock | A | 195,924 | $0.00 | 195,924 | D | A |
| 14 Aug, 2025 | Brittany Hankamer | - | - | 171,563 | D | |||
| 14 Aug, 2025 | Brittany Hankamer | Common Stock | D | 181 | $12.98 | 171,563 | D | F |
| 08 Aug, 2025 | Christophe Couturier | Common Stock | A | 65,217 | $0.00 | 211,271 | D | A |