As of November 6, 2026, Avantor, Inc. is a publicly traded company (NYSE: AVTR); its largest reported holder is Dodge & Cox, with 17.2% on Schedule 13G/A of August 13, 2025, then BlackRock (8.7%). The largest insider holding is Michael Stubblefield, the chief executive and president, with 1,917,522 shares (0.28% of shares outstanding), per Form 4 of May 21, 2025 (Schedule 13G/A, August 13, 2025).
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Is Avantor, Inc. a real, registered company?
- Avantor Inc files with the SEC under CIK 1722482 (its SEC filings).
- Its shares are listed under the ticker AVTR on NYSE (SEC company record).
- business address in Radnor, Pennsylvania, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under Avantor Inc in our court records and SEC 8-K records (as of 2026-11-06).
- Leadership changes: the latest reported is Todd Garner (Form 8-K filed 2026-09-21). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Vanguard (filed 2026-04-29).
Who are Avantor, Inc.'s owners and officers?
Avantor, Inc.: business address in Radnor, Pennsylvania; industry Laboratory Analytical Instruments (Form D, 2026-09-21).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G, 2026-04-29 | Vanguard Capital Management | 5.29% |
| Schedule 13G/A, 2026-03-26 | The Vanguard Group | 0% |
| Schedule 13G/A, 2025-11-14 | T. Rowe Price Investment Management, Inc. | 4.8% |
| Schedule 13G/A, 2025-10-17 | Blackrock, Inc. | 8.7% |
| Schedule 13G/A, 2025-08-14 | T. Rowe Price Investment Management, Inc. | 8.3% |
| Schedule 13G/A, 2025-08-13 | Dodge & Cox | 17.2% |
Questions about who owns Avantor, Inc.
Who owns Avantor, Inc.?
On this page, 3 holders' latest ownership filings report 5% or more of Avantor, Inc.: Dodge & Cox (17.2%, Schedule 13G/A, filed 2025-08-13), Blackrock, Inc. (8.7%, Schedule 13G/A, filed 2025-10-17) and Vanguard Capital Management (5.29%, Schedule 13G, filed 2026-04-29).
Who are the largest shareholders of Avantor, Inc.?
By the share each holder's latest filing reports, the largest holders of Avantor, Inc. on this page are Dodge & Cox (17.2%), Blackrock, Inc. (8.7%) and Vanguard Capital Management (5.29%).
When did Dodge & Cox buy into Avantor, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Dodge & Cox on this page is the Schedule 13G/A, filed 2025-08-13, reporting 17.2%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 6 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-09-21 | Todd Garner | appointed | ||
| Form 8-K, 2026-09-21 | Todd Garner | appointed | ||
| Form 8-K, 2026-04-01 | R. Brent Jones | Chief Financial Officer | departed |
Which insiders own Avantor, Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the chief executive and president: 1,917,522 shares (0.28% of shares outstanding), 1,219,013 held directly and 698,509 indirectly (Form 4, 2025-05-21).
- , the chief executive and president: 737,334 shares (0.11% of shares outstanding) (Form 4, 2026-08-20).
- , a director: 508,376 shares (0.08% of shares outstanding), 33,376 held directly and 475,000 indirectly (Form 4, 2026-05-11).
- , a director: 483,381 shares (0.07% of shares outstanding), 83,381 held directly and 400,000 indirectly (Form 4, 2026-05-11).
- , the chief financial officer and executive vice president: 419,782 shares (0.06% of shares outstanding) (Form 4, 2026-02-25).
Shares outstanding: 677,615,769 as of 2026-10-23, from the company's latest SEC cover page.
How much has Avantor, Inc. raised?
No fundraising or offering filing from Avantor, Inc. is on file with us.
Keep reading
More on Avantor, Inc. and the records around it.
Avantor, Inc. elsewhere on the record
- Leadership changes Sep 2026
Companies that share a holder
- Dodge & Cox also filed stake reports on 36 other companies: Charter Communications, Inc. (Aug 2026), SUN COMMUNITIES, INC (Aug 2026), TransUnion (Jun 2026)
- T. Rowe Price Investment Management, Inc. also filed stake reports on 167 other companies: CABALETTA BIO INC (Nov 2026), MADISON SQUARE GARDEN SPORTS CORP (Nov 2026), MSG RANGERS CORP (Nov 2026)
- Vanguard Capital Management also filed stake reports on 1495 other companies: A10 Networks Inc (Oct 2026), Altisource Portfolio Solutions SA (Oct 2026), Alto Neuroscience Inc (Oct 2026)
Related pages
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