Mason Hawkins's AVTR Position Overview
Mason Hawkins (via Southeastern Asset Management Inc/Tn/) currently holds 3.52 M shares of Avantor, Inc. (AVTR) worth $27.6 M, representing 1.36% of the portfolio. First purchased in 2025-Q3, this short-term holding has been held for 3 quarters.
Based on 13F filings, Mason Hawkins has maintained this position in AVTR for several quarters, showing initial confidence in the investment. Largest reduction occurred in Q4 2025, reducing 1.6 M shares.
Analysis based on 13F filings available since 2013 Q2
Mason Hawkins's Avantor (AVTR) Holding Value Over Time
Track share changes against reported price movement
Quarterly Avantor (AVTR) Trades by Mason Hawkins
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q1 2026 | -28,306 | Reduce 0.80% | 3.52 M | $7.84 |
| Q4 2025 | -1.6 M | Reduce 31.09% | 3.55 M | $11.46 |
| Q3 2025 | +5.15 M | New Buy | 5.15 M | $12.48 |
Mason Hawkins's Avantor Investment FAQs
Mason Hawkins first purchased Avantor, Inc. (AVTR) in Q3 2025, acquiring 5,149,420 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Mason Hawkins has held Avantor, Inc. (AVTR) for 3 quarters since Q3 2025.
Mason Hawkins's largest addition to Avantor, Inc. (AVTR) was in Q3 2025, adding 5,149,420 shares worth $64.26 M.
According to the latest 13F filing for Q1 2026, Mason Hawkins's firm, Southeastern Asset Management Inc/Tn/, owns 3,520,212 shares of Avantor, Inc. (AVTR), valued at approximately $27.6 M.
As of the Q1 2026 filing, Avantor, Inc. (AVTR) represents approximately 1.36% of Mason Hawkins's publicly disclosed stock portfolio, making it one of their key holdings.
Mason Hawkins's peak holding in Avantor, Inc. (AVTR) was 5,149,420 shares, as reported at the end of Q3 2025.