Avantor, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| MEHRA SANJEEV K | — | Purchase | 350,000 | $11.09 | $3,881,500 | 350,000 | Dec 5, 2025 |
| Ligner Emmanuel | President and CEO | Purchase | 87,500 | $11.35 | $993,125 | 283,424 | Nov 17, 2025 |
| Blenn Mary | EVP, Chief Operating Officer | Award / Grant | 17,391 | — | — | 17,391 | Nov 10, 2025 |
| SUMME GREGORY L | — | Purchase | 100,000 | $11.25 | $1,125,000 | 300,000 | Oct 30, 2025 |
| LUCIER GREGORY T | — | Award / Grant | 8,736 | — | — | 8,736 | Oct 3, 2025 |
| Gourdier Benoit | EVP, Bioscience Production | Tax Withholding | 1,264 | $13.77 | $17,405 | 235,684 | Oct 2, 2025 |
| SUMME GREGORY L | — | Purchase | 100,000 | $12.56 | $1,256,000 | 200,000 | Aug 21, 2025 |
| Ligner Emmanuel | President and CEO | Award / Grant | 195,924 | — | — | 195,924 | Aug 18, 2025 |
| Hankamer Brittany | EVP, Chief HR Officer | Tax Withholding | 181 | $12.98 | $2,349 | 171,563 | Aug 14, 2025 |
| Couturier Christophe | EVP, AMEA | Award / Grant | 65,217 | — | — | 211,271 | Aug 8, 2025 |
| Eck Steven W | SVP & Chief Accounting Officer | Sale | 3,476 | $11.39 | $39,592 | 55,068 | Aug 5, 2025 |
| Eck Steven W | SVP & Chief Accounting Officer | Tax Withholding | 1,385 | $13.44 | $18,614 | 58,544 | Jul 31, 2025 |
| Sokenu Claudius | EVP, Chief Legal & Compliance | Tax Withholding | 3,123 | $14.01 | $43,753 | 177,106 | Jul 24, 2025 |
| Walker Corey | President Laboratory Solutions | Tax Withholding | 2,730 | $13.57 | $37,046 | 231,271 | Jun 21, 2025 |
| SUMME GREGORY L | — | Purchase | 30,000 | $12.50 | $375,000 | 100,000 | May 23, 2025 |
| SUMME GREGORY L | — | Purchase | 20,000 | $12.65 | $253,000 | 70,000 | May 22, 2025 |
| Stubblefield Michael | President & CEO | Gift | 76,000 | — | — | 545,500 | May 21, 2025 |
| Walker Corey | President Laboratory Solutions | Award / Grant | 162,866 | — | — | 234,001 | May 9, 2025 |
| Eck Steven W | SVP & Chief Accounting Officer | Award / Grant | 20,358 | — | — | 59,929 | May 9, 2025 |
| Sokenu Claudius | EVP, Chief Legal & Compliance | Award / Grant | 122,149 | — | — | 180,229 | May 9, 2025 |
| Hankamer Brittany | EVP, Chief HR Officer | Award / Grant | 122,149 | — | — | 171,744 | May 9, 2025 |
| Couturier Christophe | EVP, AMEA | Award / Grant | 61,074 | — | — | 144,914 | May 9, 2025 |
| Jones R. Brent | EVP, Chief Financial Officer | Award / Grant | 162,866 | — | — | 269,676 | May 9, 2025 |
| Gourdier Benoit | EVP, Bioscience Production | Award / Grant | 162,866 | — | — | 236,948 | May 9, 2025 |
| Carethers John | — | Award / Grant | 17,100 | — | — | 45,858 | May 8, 2025 |
| SUMME GREGORY L | — | Award / Grant | 17,100 | — | — | 58,111 | May 8, 2025 |
| Massaro Joseph R | — | Award / Grant | 17,100 | — | — | 52,138 | May 8, 2025 |
| Peacock Jonathan M | — | Award / Grant | 17,100 | — | — | 219,815 | May 8, 2025 |
| Kang Lan | — | Award / Grant | 17,100 | — | — | 52,315 | May 8, 2025 |
| Murthy Mala | — | Award / Grant | 17,100 | — | — | 44,209 | May 8, 2025 |
| Andres Juan | — | Award / Grant | 17,100 | — | — | 65,480 | May 8, 2025 |
| Makin Louise | — | Award / Grant | 17,100 | — | — | 21,870 | May 8, 2025 |
| SEVERINO MICHAEL | — | Award / Grant | 17,100 | — | — | 60,551 | May 8, 2025 |
| SUMME GREGORY L | — | Purchase | 25,000 | $12.00 | $300,000 | 50,000 | May 7, 2025 |
| Massaro Joseph R | — | Purchase | 8,100 | $12.30 | $99,630 | 35,038 | Apr 29, 2025 |
| SUMME GREGORY L | — | Purchase | 25,000 | $12.50 | $312,500 | 25,000 | Apr 28, 2025 |
| Kang Lan | — | Purchase | 5,000 | $12.57 | $62,850 | 35,215 | Apr 28, 2025 |
| Peacock Jonathan M | — | Purchase | 8,091 | $12.81 | $103,646 | 202,715 | Apr 28, 2025 |
| Couturier Christophe | EVP, AMEA | Tax Withholding | 569 | $15.13 | $8,609 | 83,840 | Apr 5, 2025 |
| Eck Steven W | SVP & Chief Accounting Officer | Sale | 4,907 | $17.53 | $86,020 | 40,604 | Feb 27, 2025 |
| Bramwell James | EVP Sales, Customer Excellence | Sale | 774 | $17.00 | $13,158 | 86,605 | Feb 26, 2025 |
| Couturier Christophe | EVP, AMEA | Tax Withholding | 750 | $17.47 | $13,103 | 84,965 | Feb 25, 2025 |
| Eck Steven W | SVP & Chief Accounting Officer | Tax Withholding | 439 | $17.47 | $7,669 | 46,016 | Feb 25, 2025 |
| Bramwell James | EVP Sales, Customer Excellence | Tax Withholding | 2,181 | $17.47 | $38,102 | 91,720 | Feb 25, 2025 |
| Stubblefield Michael | President & CEO | Tax Withholding | 4,969 | $17.56 | $87,256 | 1,448,022 | Feb 24, 2025 |
| Hankamer Brittany | EVP, Chief HR Officer | Tax Withholding | 369 | $17.56 | $6,480 | 49,595 | Feb 24, 2025 |
| Bramwell James | EVP Sales, Customer Excellence | Tax Withholding | 3,443 | $17.30 | $59,564 | 93,901 | Feb 23, 2025 |
| Couturier Christophe | EVP, AMEA | Award / Grant | 12,864 | — | — | 87,221 | Feb 23, 2025 |
| Gourdier Benoit | EVP, Bioscience Production | Tax Withholding | 2,842 | $17.30 | $49,167 | 74,082 | Feb 20, 2025 |
| Eck Steven W | SVP & Chief Accounting Officer | Tax Withholding | 1,956 | $17.30 | $33,839 | 46,455 | Feb 20, 2025 |