Avantor, Inc. (AVTR) Shareholders & Insider Trades
Avantor shareholders at a glance
The largest holder of Avantor stock is Dodge & Cox, with 120.0 million shares (17.61% of the company), worth about $1.75 billion as of September 25, 2026. The 10 largest holders together own 53.8%.
In Q2 2026, 476 institutional holdings reports listed 707.0 million shares worth $7.70 billion, up 4.6% in shares from Q1 2026.
Insiders reported 65 transactions in the last two years: 3 sales worth $222,209 and 16 purchases. The newest one on file is from May 8, 2026 (Lucier Gregory T, Director).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through May 8, 2026.
Avantor, Inc.
Shareholders Summary
2026Q2
Ownership by Type
Geographic Distribution
Largest Avantor shareholders
| Holder | Shares | % of company | Value |
|---|---|---|---|
| Dodge & Cox | 120.0 million | 17.61% | $1.7B |
| BlackRock Advisors LLC | 65.5 million | 9.61% | $953.0M |
| Vanguard Portfolio Management LLC | 31.3 million | 4.60% | $456.0M |
| Vanguard Capital Management LLC | 30.8 million | 4.52% | $448.0M |
| Greenhaven Associates, Inc. | 24.6 million | 3.61% | $358.0M |
| State Street Corporation | 21.6 million | 3.16% | $314.0M |
| Engine Capital Management LP | 19.9 million | 2.91% | $289.0M |
| Barrow, Hanley, Mewhinney & Strauss LLC | 19.7 million | 2.90% | $287.0M |
| DFA Australia Ltd. | 19.3 million | 2.83% | $280.0M |
| New Mountain Capital LLC | 14.0 million | 2.05% | $204.0M |
As of September 25, 2026.
Avantor institutional holdings by quarter
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 476 | 707.0 million | $7.7B |
| Q1 2026 | 449 | 676.0 million | $5.3B |
| Q4 2025 | 453 | – | $8.2B |
| Q3 2025 | 501 | 681.0 million | $8.5B |
| Q2 2025 | 551 | 713.0 million | $9.6B |
| Q1 2025 | 520 | 697.0 million | $11.4B |
| Q4 2024 | 532 | 686.0 million | $14.5B |
| Q3 2024 | 568 | 688.0 million | $17.8B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
Avantor insider trades
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Lucier Gregory T | May 8, 2026 | Director | Purchase at price 8.32 per share. | $83,200 |
| Lucier Gregory T | May 7, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Murthy Mala | May 7, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Massaro Joseph R | May 7, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Makin Louise | May 7, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Dingemans Simon | May 7, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Dingemans Simon | May 1, 2026 | Director | Purchase at price 8.14 per share. | $203,500 |
| Brellier Ludovic | May 1, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Eck Steven W. | Apr 2, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Mehra Sanjeev K | Mar 10, 2026 | Director | Purchase at price 8.01 per share. | $1.0M |
| Lucier Gregory T | Feb 19, 2026 | Director | Purchase at price 9.16 per share. | $458,000 |
| Walker Corey | Feb 19, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
Newest 12 of 65 insider transactions in the last two years.
Questions and answers
Who owns the most Avantor stock?
Dodge & Cox, with 17.61% of the company (as of September 25, 2026). Next: BlackRock Advisors LLC (9.61%) and Vanguard Portfolio Management LLC (4.60%).
How many institutions own Avantor stock?
476 institutional holdings reports listed Avantor shares in Q2 2026, 707.0 million shares in all worth $7.70 billion.
Are Avantor insiders buying or selling the stock?
In the last two years insiders reported 3 sales and 16 purchases (65 transactions in all); the newest on file is from May 8, 2026.
