Avantor (AVTR) Held by Superinvestors
AVANTOR INC (AVTR) is currently held by 5 superinvestors tracked by InsiderSet, with a combined reported market value of approximately $1.53B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Dodge & Cox Stock Fund is currently the largest disclosed institutional shareholder of AVTR tracked by InsiderSet, reporting ownership valued at approximately $1.19B in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $1.84B, representing an estimated gain of +55.05% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 100% of the total disclosed AVTR value among the investors covered in this analysis. Major shareholders include Dodge & Cox Stock Fund, Greenhaven Associates, Yacktman Asset Management, and several other long-term asset managers with concentrated positions in AVANTOR INC (AVTR).
This page ranks the largest institutional AVTR shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Dodge & Cox Stock Fund | V. D. Dodge, E. M. Cox | 0.62% | 120,020,974 | $1,188,207,643 | $1,842,321,951 | +$654,114,308 | +55.05% |
| Greenhaven Associates | Edgar Wachenheim III | 2.82% | 24,637,310 | $243,909,369 | $378,182,709 | +$134,273,340 | +55.05% |
| Yacktman Asset Management | Donald Yacktman | 0.58% | 4,770,000 | $47,223,000 | $73,219,500 | +$25,996,500 | +55.05% |
| Longleaf Partners | Mason Hawkins | 2.44% | 4,725,478 | $46,782,232 | $72,536,087 | +$25,753,855 | +55.05% |
| Sequoia Financial Advisors | 0.00% | 22,739 | $225,120 | $349,044 | +$123,924 | +55.05% |
Frequently asked questions about AVTR
Who are the largest superinvestors holding AVTR?
The largest superinvestors holding AVTR in the latest SEC Form 13F filings include Dodge & Cox Stock Fund, Greenhaven Associates, Yacktman Asset Management, Longleaf Partners, and Sequoia Financial Advisors. InsiderSet ranks these superinvestors by their latest reported AVTR position.
What does the AVTR superinvestors page include?
This page tracks AVTR positions reported by a curated group of notable institutional investors and fund managers through SEC Form 13F. AVANTOR INC (AVTR) on this page reflects disclosed 13F holdings among those superinvestors, not every institutional shareholder of the stock.
How many superinvestors hold AVTR?
InsiderSet currently tracks 5 superinvestors reporting AVTR holdings in the latest available 13F data. This is the curated set on this page, not the total number of institutions that own AVTR.
How much AVTR stock do superinvestors hold?
Superinvestors tracked by InsiderSet disclosed approximately $1.53B in AVTR holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value, and it covers the curated superinvestors on this page rather than every institutional filer.
When were AVTR superinvestor holdings last updated?
The latest AVTR superinvestor holdings on InsiderSet are based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time holdings.
Are superinvestor AVTR holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by these superinvestors as of the end of the reporting quarter. A superinvestor may have changed its AVTR position after the reporting date.
Are superinvestors buying or selling AVTR?
Buying and selling can be analyzed by comparing AVTR positions across consecutive 13F reporting periods. InsiderSet's AVTR Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View AVTR ownership changes.
How have superinvestor AVTR holdings changed over time?
InsiderSet tracks AVTR holdings among these superinvestors across multiple 13F reporting periods, so holder counts, reported value, and reported shares can be compared over time.