Avantor, Inc.
AVTR- Exchange
- NYSE
- Industry
- Laboratory Analytical Instruments
- SEC CIK
- 0001722482
No open-market purchases or sales by Avantor, Inc. insiders were filed in the last 90 days; 460 institutions reported holding it in 13F filings for Q2 2026, worth $6.92B in total; superinvestors Greenhaven Associates and Southeastern Asset Management (Longleaf) hold it.
Holders of 5% or more of AVTR
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Avantor, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Dodge & Cox | 13G/A | 17.20%117.4M shares | +2.60 ppfrom 14.60% | Feb 13, 20252 filings | Aug 13, 2025 | SEC |
| BlackRock, Inc. | 13G/A | 8.70%59.0M shares | – | Oct 17, 20251 filing | Oct 17, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
7 Schedule 13D and 13G filings on Avantor, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 26, 20264:11 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Nov 14, 202512:18 PM ET | T. Rowe Price Investment Management, Inc. | 13G/A | 4.80%32.9M shares | −3.50 ppfrom 8.30%Below 5% | Sep 30, 2025 | SEC |
| Oct 17, 20256:05 PM ET | BlackRock, Inc. | 13G/A | 8.70%59.0M shares | – | Sep 30, 2025 | SEC |
| Aug 14, 202512:12 PM ET | T. Rowe Price Investment Management, Inc. | 13G/A | 8.30%56.5M shares | +2.20 ppfrom 6.10% | Jun 30, 2025 | SEC |
| Aug 13, 20254:58 PM ET | Dodge & Cox | 13G/A | 17.20%117.4M shares | +2.60 ppfrom 14.60% | Jun 30, 2025 | SEC |
| Feb 14, 20259:45 AM ET | T. Rowe Price Investment Management, Inc. | 13G/A | 6.10%41.4M shares | – | Dec 31, 2024 | SEC |
| Feb 13, 20253:54 PM ET | Dodge & Cox | 13G/A | 14.60%99.1M shares | – | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Avantor, Inc. shares.
No Form 144 notices for Avantor, Inc. are on file.