Avantor (AVTR)Director bought ~$3.88M

~$3.88M

Approx. value · 350K sh @ $11.09

350K

Holds after · shares reported

Traded

Dec 5, 2025

Filed

Dec 9, 2025

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Oct 9, 2025Company filing · Form 8-K · Material agreement, Agreement endedSigned an important agreement, and ended an important agreement (and 2 more items)
2. Oct 10, 2025Company filing · Form 8-K · Executive change, Reg FDChanged a top executive or board member, and shared information with investors“On October 10, 2025, Jonathan Peacock informed Avantor, Inc. (the “Company”) that he will step down as the Company’s chairman, member of the Board of Directors (the “Board”) and member of the Nominating and Governance Committee on December 31, 2025.”
3. Oct 26, 2025Company filing · Form 8-K · Executive change, Reg FDChanged a top executive or board member, and shared information with investors“On November 10, 2025, the Company, announced the appointment Mary Blenn as Executive Vice President and Chief Operating Officer. Ms. Blenn is a member of the Company’s Executive Leadership Team.”
4. Oct 29, 2025Company filing · Form 8-K · ResultsReported its results
5. Oct 30, 2025InsiderDirector purchased ~$1.13M of AVTR shares in the open market
6. Nov 17, 2025Insider · Their first buy on recordCEO purchased ~$993K of AVTR shares in the open market
7. Dec 4, 2025Company filing · Form 8-K · Executive change, Reg FDChanged a top executive or board member, and shared information with investors“On December 4, 2025, the Board of Directors (the “Board”) of Avantor, Inc. (the “Company”), upon the recommendation of its Nominating and Governance Committee, elected Sanjeev Mehra as a director with an initial term expiring on the date of the Company’s 2026 Annual Meeting of Stockholders.”
8. Dec 4, 2025Company filing · Form 8-K · Executive changeChanged a top executive or board member“On December 4, 2025, Avantor, Inc. (the “Company”) filed a Current Report on Form 8-K announcing the election of Sanjeev Mehra as a director of the Company effective December 4, 2025.”
9. Dec 5, 2025 · this disclosureInsider · Largest insider buy since 2019Director purchased ~$3.88M of AVTR shares in the open market

What came next

1. Dec 17, 2025Company filing · Form 8-K · Executive change, Reg FDChanged a top executive or board member, and shared information with investors“On December 17, 2025, the Board of Directors (the “Board”) of Avantor, Inc. (the “Company”), upon the recommendation of its Nominating and Governance Committee, elected Simon Dingemans as a director, effective January 2, 2026, with an initial term expiring on the date of the Company’s 2026 Annual Meeting of Stockholders.”
2. Dec 17, 2025Company filing · Form 8-K · Executive changeChanged a top executive or board member“On December 17, 2025, Avantor, Inc. (the “Company”) filed a Current Report on Form 8-K announcing the election of Simon Dingemans as a director of the Company effective January 2, 2026.”
3. Feb 11, 2026Company filing · Form 8-K · Results, Reg FDReported its results, and shared information with investors
4. Feb 12, 2026InsiderDirector purchased ~$940K of AVTR shares in the open market
5. Feb 19, 2026Insider · Their first buy on recordDirector purchased ~$458K of AVTR shares in the open market
6. Mar 10, 2026InsiderDirector purchased ~$1M of AVTR shares in the open market
7. Mar 26, 2026Company filing · Form 8-K · Executive change, Reg FDChanged a top executive or board member, and shared information with investors“On March 26, 2026, Mr. R. Brent Jones notified Avantor, Inc. (the “Company”) of his decision to resign as the Company’s Executive Vice President and Chief Financial Officer (“CFO”) to join a company outside the life sciences industry.”

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for Avantor

For Avantor, OQRO holds 13 fund holdings reports (13F) and 1 federal contract award dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its AVTR page.

Other recent filings by Sanjeev K Mehra, Director

• SEC Form 4 at Avantor (AVTR)Mar 11, 2026

The full history of Sanjeev K Mehra, Director is on the profile page.

How this filing works

• SEC Form 4
• Open-market purchase
• Rule 10b5-1 trading plans

Other disclosures at Avantor

• USAspending.gov award recordAug 31, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026

Everything OQRO holds on this company is on its AVTR page.