SUMME GREGORY L - Insider Non-Derivative Transactions at Avantor, Inc. (AVTR) - (SEC)

Updated on January 3, 2026.

According to recent SEC insider information filed on Oct 30, 2025, SUMME GREGORY L's relationship to Avantor, Inc. (AVTR) is Director, and currently has 300,000 shares of Common Stock.

The chart below shows the number of shares owned, and the table shows the recent insider transactions.

You can see similar information for other AVTR insiders.

Related Topics: SEC Topic List.

Data Source: SEC.

SUMME GREGORY L - Insider Non-Derivative Transactions of AVTR Common Stock

SUMME GREGORY L - Insider Non-Derivative Transactions at AVTR

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Date	Transaction	No. of Shares	Price Per Share	Shares Owned After Transactions
Oct 31, 2025	P -- (Common Stock)	100000	11.25	300000
Aug 22, 2025	P -- (Common Stock)	100000	12.56	200000
May 24, 2025	P -- (Common Stock)	30000	12.5	100000
May 23, 2025	P -- (Common Stock)	20000	12.65	70000
May 9, 2025	Acquisition -- (Common Stock)	17100	0	58111
May 8, 2025	P -- (Common Stock)	25000	12	50000
Apr 29, 2025	P -- (Common Stock)	25000	12.5	25000
May 10, 2024	Acquisition -- (Common Stock)	8477	0	41011
May 12, 2023	Acquisition -- (Common Stock)	9808	0	32534