As of April 28, 2026, Avantor's top three insider holders are Michael Stubblefield (President Ceo, 1.76Mn shares), Michael Stubblefield (President Ceo, 1.76Mn shares), Emmanuel Ligner (President And Ceo, 767.14K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Michael Stubblefield | President Ceo | 1,219,013 | 545,500 | 21 May, 2025 |
| Michael Stubblefield | President Ceo | 1,219,013 | 545,500 | 21 May, 2025 |
| Emmanuel Ligner | President And Ceo | 767,137 | 0 | 23 Feb, 2026 |
| Emmanuel Ligner | President And Ceo | 767,137 | 0 | 23 Feb, 2026 |
| Jo Natauri | - | 0 | 557,656 | 13 Aug, 2021 |
| Jo Natauri | - | 0 | 557,656 | 13 Aug, 2021 |
| Sanjeev K Mehra | - | 0 | 475,000 | 11 Mar, 2026 |
| R. Brent Jones | Evp, Chief Financial Officer | 419,782 | 0 | 25 Feb, 2026 |
| R. Brent Jones | Evp, Chief Financial Officer | 419,782 | 0 | 25 Feb, 2026 |
| Gregory L Summe | - | 0 | 400,000 | 12 Feb, 2026 |
| Gregory L Summe | - | 0 | 400,000 | 12 Feb, 2026 |
| Corey Walker | President, Vwr Dist. Servs. | 387,545 | 0 | 23 Feb, 2026 |
| Corey Walker | President, Vwr Dist. Servs. | 387,545 | 0 | 23 Feb, 2026 |
| Benoit Gourdier | Evp, Bioscience Medtech | 362,859 | 0 | 25 Feb, 2026 |
| Benoit Gourdier | Evp, Bioscience Medtech | 362,859 | 0 | 25 Feb, 2026 |
| Mary Blenn | Evp, Chief Operating Officer | 253,384 | 0 | 23 Feb, 2026 |
| Mary Blenn | Evp, Chief Operating Officer | 253,384 | 0 | 23 Feb, 2026 |
| Claudius Sokenu | Evp, Chief Legal Compliance | 252,429 | 0 | 25 Feb, 2026 |
| Claudius Sokenu | Evp, Chief Legal Compliance | 252,429 | 0 | 25 Feb, 2026 |
| Brittany Hankamer | Evp, Chief Hr Officer | 249,045 | 0 | 25 Feb, 2026 |
| Brittany Hankamer | Evp, Chief Hr Officer | 249,045 | 0 | 25 Feb, 2026 |
| Jonathan M Peacock | - | 219,815 | 0 | 12 May, 2025 |
| Jonathan M Peacock | - | 219,815 | 0 | 12 May, 2025 |
| Christophe Couturier | Evp, Amea | 211,271 | 0 | 12 Aug, 2025 |
| Christophe Couturier | Evp, Amea | 211,271 | 0 | 12 Aug, 2025 |
| Frederic Vanderhaegen | Evp, Americas And Europe | 160,735 | 0 | 28 Aug, 2023 |
| Frederic Vanderhaegen | Evp, Americas And Europe | 160,735 | 0 | 28 Aug, 2023 |
| Steven W Eck | Svp Chief Accounting Officer | 130,978 | 0 | 06 Apr, 2026 |
| Michael Wondrasch | Evp Cio | 96,072 | 0 | 22 Feb, 2023 |
| Michael Wondrasch | Evp Cio | 96,072 | 0 | 22 Feb, 2023 |
| Justin Miller | Evp General Counsel | 93,336 | 0 | 19 May, 2023 |
| Justin Miller | Evp General Counsel | 93,336 | 0 | 19 May, 2023 |
| Gerard Brophy | Evp, Biopharma Production | 89,032 | 0 | 19 May, 2023 |
| Gerard Brophy | Evp, Biopharma Production | 89,032 | 0 | 19 May, 2023 |
| James Bramwell | Evp Sales, Customer Excellence | 86,605 | 0 | 28 Feb, 2025 |
| James Bramwell | Evp Sales, Customer Excellence | 86,605 | 0 | 28 Feb, 2025 |
| Thomas A Szlosek | Evp Cfo | 77,489 | 0 | 19 May, 2023 |
| Thomas A Szlosek | Evp Cfo | 77,489 | 0 | 19 May, 2023 |
| Randy Lee Stone | Evp, Laboratory Solutions | 68,105 | 0 | 18 Apr, 2024 |
| Randy Lee Stone | Evp, Laboratory Solutions | 68,105 | 0 | 18 Apr, 2024 |
| Juan Andres | - | 65,480 | 0 | 12 May, 2025 |
| Gregory L Summe | - | 58,111 | 0 | 12 May, 2025 |
| Gregory L Summe | - | 58,111 | 0 | 12 May, 2025 |
| Lan Kang | - | 52,315 | 0 | 12 May, 2025 |
| Lan Kang | - | 52,315 | 0 | 12 May, 2025 |
| Joseph R Massaro | - | 52,138 | 0 | 12 May, 2025 |
| Joseph R Massaro | - | 52,138 | 0 | 12 May, 2025 |
| Gregory T Lucier | - | 0 | 50,000 | 23 Feb, 2026 |
| John Carethers | - | 45,858 | 0 | 12 May, 2025 |
| John Carethers | - | 45,858 | 0 | 12 May, 2025 |
| Mala Murthy | - | 44,209 | 0 | 12 May, 2025 |
| Kitty Sahin | Evp, Strategycorp Development | 42,274 | 0 | 22 Jul, 2024 |
| Kitty Sahin | Evp, Strategycorp Development | 42,274 | 0 | 22 Jul, 2024 |
| Christi Shaw | - | 36,271 | 0 | 15 May, 2023 |
| Christi Shaw | - | 36,271 | 0 | 15 May, 2023 |
| Thomas A Szlosek | Evp Cfo | 0 | 35,668 | 17 Nov, 2022 |
| Thomas A Szlosek | Evp Cfo | 0 | 35,668 | 17 Nov, 2022 |
| Louise Makin | - | 21,870 | 0 | 12 May, 2025 |
| Louise Makin | - | 21,870 | 0 | 12 May, 2025 |
| Mark Christopher Murray | Evp, Biomaterials At | 18,680 | 0 | 18 Jan, 2022 |
| Mark Christopher Murray | Evp, Biomaterials At | 18,680 | 0 | 18 Jan, 2022 |
| Gregory T Lucier | - | 8,736 | 0 | 07 Oct, 2025 |
| Sanjeev K Mehra | - | 8,106 | 0 | 09 Dec, 2025 |
| Matthew S. Holt | - | 7,908 | 0 | 16 May, 2022 |
| Matthew S. Holt | - | 7,908 | 0 | 16 May, 2022 |
| Simon Dingemans | - | 6,225 | 0 | 12 Jan, 2026 |
| Simon Dingemans | - | 6,225 | 0 | 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 |
|---|---|---|---|---|---|---|---|---|
| 03 Apr, 2026 | Steven W Eck | Common Stock | A | 31,645 | $0.00 | 130,978 | D | A |
| 10 Mar, 2026 | Sanjeev K Mehra | Common Stock | A | 125,000 | $8.01 | 475,000 | I | P |
| 23 Feb, 2026 | R. Brent Jones | Common Stock | D | 2,805 | $8.89 | 419,782 | D | F |
| 23 Feb, 2026 | Benoit Gourdier | Common Stock | D | 3,029 | $8.89 | 362,859 | D | F |
| 23 Feb, 2026 | Brittany Hankamer | Common Stock | D | 1,324 | $8.89 | 249,404 | D | F |
| 23 Feb, 2026 | Claudius Sokenu | Common Stock | D | 2,376 | $8.89 | 252,429 | D | F |
| 23 Feb, 2026 | R. Brent Jones | Common Stock | D | 2,805 | $8.89 | 419,782 | D | F |
| 23 Feb, 2026 | Benoit Gourdier | Common Stock | D | 3,029 | $8.89 | 362,859 | D | F |
| 23 Feb, 2026 | Steven W Eck | Common Stock | D | 2,017 | $8.89 | 99,785 | D | F |
| 23 Feb, 2026 | Claudius Sokenu | Common Stock | D | 2,376 | $8.89 | 252,429 | D | F |
| 23 Feb, 2026 | Brittany Hankamer | Common Stock | D | 1,324 | $8.89 | 249,404 | D | F |
| 24 Feb, 2026 | Brittany Hankamer | Common Stock | D | 359 | $9.11 | 249,045 | D | F |
| 24 Feb, 2026 | Brittany Hankamer | Common Stock | D | 359 | $9.11 | 249,045 | D | F |
| 24 Feb, 2026 | Steven W Eck | Common Stock | D | 452 | $9.11 | 99,333 | D | F |
| 19 Feb, 2026 | Corey Walker | Common Stock | A | 161,237 | $0.00 | 392,508 | D | A |
| 19 Feb, 2026 | Claudius Sokenu | Common Stock | A | 80,618 | $0.00 | 257,724 | D | A |
| 19 Feb, 2026 | Brittany Hankamer | Common Stock | A | 80,618 | $0.00 | 252,181 | D | A |
| 19 Feb, 2026 | Mary Blenn | Common Stock | A | 235,993 | $0.00 | 253,384 | D | A |
| 19 Feb, 2026 | Emmanuel Ligner | Common Stock | A | 483,713 | $0.00 | 767,137 | D | A |
| 19 Feb, 2026 | R. Brent Jones | Common Stock | A | 161,237 | $0.00 | 432,093 | D | A |