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 $6.93B in total; superinvestors Greenhaven Associates and Southeastern Asset Management (Longleaf) hold it.
Key figures
- Insider buysOpen market, last 90 days
- 0
- Insider sellsOpen market, last 90 days
- 0
- 13F holdersQ2 2026, +33 vs. previous quarter
- 460
- 13F valueReported value at the end of Q2 2026
- $6.93B
- Superinvestors holdingAt the end of Q2 2026
- 2
Price chart
Superinvestors holding AVTR, Q2 2026
2 superinvestors report holding Avantor, Inc. on Form 13F. Percentages are the stock's share of each portfolio.
Greenhaven Associates
Edgar Wachenheim III
2.8%
Avantor, Inc.'s share of the portfolio
- Shares
- 24,637,310
- Value
- $243.9M
Southeastern Asset Management (Longleaf)
Mason Hawkins
2.4%
Avantor, Inc.'s share of the portfolio
- Shares
- 4,725,478
- Value
- $46.8M
Latest insider trades
Open-market purchases and sales by Avantor, Inc. insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| May 11, 2026 (view filing) | May 8 | 3 days | Lucier Gregory TDirector | PPurchase | +10.0K | $8.32 | +$83.2K | +20.0%60.0K after | |
| May 5, 2026 (view filing) | May 1 | 4 days | Dingemans SimonDirector | PPurchase | +25.0K | $8.14 | +$203.5K | New position25.0K after | |
| Mar 11, 2026 (view filing) | Mar 10 | 1 day | Mehra Sanjeev KDirector | PPurchase | +125.0K | $8.01 | +$1.00M | +35.7%475.0K after | |
| Feb 23, 2026 (view filing) | Feb 19 | 4 days | Lucier Gregory TDirector | PPurchase | +50.0K | $9.16 | +$458.0K | New position50.0K after | |
| Feb 12, 2026 (view filing) | Feb 12 | Same day | Summe Gregory LDirector | PPurchase | +100.0K | $9.40 | +$940.0K | +33.3%400.0K after | |
| Dec 9, 2025 (view filing) | Dec 5 | 4 days | Mehra Sanjeev KDirector | PPurchase | +350.0K | $11.09 | +$3.88M | New position350.0K after | |
| Nov 17, 2025 (view filing) | Nov 17 | Same day | Ligner EmmanuelPresident and CEO | PPurchase | +87.5K | $11.35 | +$993.1K | +44.7%283.4K after | |
| Oct 31, 2025 (view filing) | Oct 30 | 1 day | Summe Gregory LDirector | PPurchase | +100.0K | $11.25 | +$1.13M | +50.0%300.0K after | |
| Aug 22, 2025 (view filing) | Aug 21 | 1 day | Summe Gregory LDirector | PPurchase | +100.0K | $12.56 | +$1.26M | +100.0%200.0K after | |
| Aug 6, 2025 (view filing) | Aug 5 | 1 day | Eck Steven WSVP & Chief Accounting Officer | SSale | −3.48K | $11.39 | −$39.6K | −5.9%55.1K after | 10b5-1 |
Top 10 13F holders, Q2 2026
The largest institutional positions in Avantor, Inc. at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Dodge & Cox | 120,020,974 | $1.19B | 0.62% | +372,645+0.3% | Added |
| BlackRock, Inc. | 70,281,231 | $695.8M | 0.01% | +4,577,677+7.0% | Added |
| Vanguard Portfolio Management LLC | 31,343,250 | $310.3M | 0.01% | +67,403+0.2% | Added |
| Vanguard Capital Management LLC | 30,802,835 | $304.9M | 0.01% | +196,723+0.6% | Added |
| Greenhaven Associates IncSuperinvestorGreenhaven Associates | 24,637,310 | $243.9M | 2.82% | +2,043,472+9.0% | Added |
| State Street Corp | 21,572,974 | $213.6M | 0.01% | +851,895+4.1% | Added |
| Dimensional Fund Advisors LP | 20,412,181 | $202.1M | 0.04% | +3,517,532+20.8% | Added |
| Engine Capital Management, LP | 19,860,830 | $196.6M | 19.13% | +80,000+0.4% | Added |
| Barrow Hanley Mewhinney & Strauss LLC | 19,735,968 | $195.4M | 0.59% | −2,622,431−11.7% | Reduced |
| New Mountain Capital, L.L.C. | 14,000,000 | $138.6M | 100.00% | 00.0% | Unchanged |