Michael Stubblefield

Companies

• AvantorBoard member May 16, 2019 to now¹
• AvantorChief executive officer May 16, 2019 to Aug 21, 2025¹
• AvantorPresident May 16, 2019 to Jun 25, 2024¹
• Ingersoll RandBoard member Aug 8, 2022 to Aug 8, 2023²

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• AAvantor AVTR1,372,022 shares³$22.4M at $16.31May 21, 2025
• IRIngersoll Rand IR1,857 shares⁴$144.9K at $78.03Aug 5, 2023

As of each latest filing. The line shows shares held over time.

Recent filings

• May 21, 2025Gift 76,000 shares of Avantor³
• May 21, 2025Gift 76,000 shares of Avantor³
• Feb 25, 2025Shares withheld for tax 4,969 shares at $17.56 of Avantor⁵
• Feb 24, 2025Shares withheld for tax 6,800 shares at $17.47 of Avantor⁵
• Feb 23, 2025Shares withheld for tax 14,674 shares at $17.30 of Avantor⁶
• Feb 20, 2025Granted 157,232 shares of Avantor⁶
• Feb 25, 2024Shares withheld for tax 7,685 shares at $24.35 of Avantor⁷
• Feb 24, 2024Shares withheld for tax 9,595 shares at $24.35 of Avantor⁷
• Feb 23, 2024Shares withheld for tax 7,422 shares at $24.35 of Avantor⁷
• Feb 23, 2024Granted 107,802 shares of Avantor⁸
• Feb 22, 2024Shares withheld for tax 41,177 shares at $24.59 of Avantor⁷
• Feb 22, 2024Granted 99,075 shares of Avantor⁷
• Feb 20, 2024Shares withheld for tax 9,711 shares at $24.05 of Avantor⁹
• Aug 5, 2023Exercised options 1,857 shares of Ingersoll Rand⁴
• May 26, 2023Gift 40,000 shares of Avantor¹⁰
• May 26, 2023Gift 40,000 shares of Avantor¹⁰
• May 17, 2023Shares withheld for tax 106,200 shares at $20.28 of Avantor¹¹
• Feb 25, 2023Shares withheld for tax 7,685 shares at $24.62 of Avantor¹²
• Feb 24, 2023Granted 99,004 shares of Avantor¹²
• Feb 23, 2023Shares withheld for tax 7,422 shares at $24.59 of Avantor¹²
• Feb 20, 2023Shares withheld for tax 15,026 shares at $24.54 of Avantor¹³
• Jan 31, 2023Shares withheld for tax 91,140 shares at $23.90 of Avantor¹⁴
• Jan 31, 2023Granted 223,482 shares of Avantor¹⁴
• Nov 16, 2022Bought 15,000 shares at $20.95 of Avantor¹⁵
• May 17, 2022Shares withheld for tax 108,700 shares at $31.33 of Avantor¹⁶