Avantor, Inc. insider trading
Every open-market purchase and sale by Avantor, Inc.'s officers, directors and largest shareholders since November 4, 2021, and what the share price did next.
| Date | Insider | Trade | Shares | Price | Value | 1M after | 3M after | 6M after |
|---|
Does following Avantor, Inc.’s insiders pay?
From February 20, 2020 to May 11, 2026, 24 insiders reported 19 open-market purchases and 32 sales not made under a pre-set plan in Avantor, Inc. Twelve months after each purchase was reported, the shares were −50.3% against the S&P 500 on average (median −64.9%), over 11 purchases with a full year of prices; 0% beat the index. After sales, the shares moved +1.9% against the index over 12 months (a negative figure means selling was the right call). That rests on fewer than 20 purchases, too few to read much into. Buying each purchase the day after it was reported, an equal amount each, held 12 months or until that insider reported a sale, would have turned $10,000 on August 16, 2021 into $8,749 by November 2, 2026, −2.5% a year. It held shares 67% of the time; the S&P 500 on those same days, with Treasury bills otherwise, made $17,084 (+10.9% a year), and held throughout $18,153 (+12.2%).
| Insider | Role | Purchases | 12 months after their purchases | Beat the S&P 500 | Sales | 12 months after their sales | Latest report |
|---|---|---|---|---|---|---|---|
| Summe Gregory L | Director | 7 | −54.9% (5) | 0% | 0 | — | February 12, 2026 |
| Natauri Jo | Director | 1 | −25.4% (1) | 0% | 4 | +19.3% (4) | August 13, 2021 |
| Ohri Devashish | EVP, IMEA | 0 | — | — | 5 | +8.5% (5) | May 28, 2021 |
| Vanderhaegen Frederic | EVP, Americas and Europe | 0 | — | — | 4 | −18.4% (4) | August 28, 2023 |
| Wondrasch Michael | EVP & CIO | 0 | — | — | 4 | +14.2% (4) | May 24, 2021 |
| Eck Steven W | SVP & Chief Accounting Officer | 0 | — | — | 3 | −30.7% (3) | September 6, 2024 |
| Bramwell James | EVP Sales, Customer Excellence | 0 | — | — | 2 | −50.5% (2) | March 1, 2024 |
| Connolly Thomas | Director | 0 | — | — | 2 | +14.5% (2) | May 7, 2021 |
| Gupta Rajiv | Director | 0 | — | — | 2 | +2.0% (2) | May 28, 2021 |
| Lucier Gregory T | Director | 2 | — | — | 0 | — | May 11, 2026 |
| Mehra Sanjeev K | Director | 2 | — | — | 0 | — | March 11, 2026 |
| Couturier Christophe | EVP, AMEA | 0 | — | — | 1 | −48.6% (1) | March 1, 2024 |
| Dingemans Simon | Director | 1 | — | — | 0 | — | May 5, 2026 |
| Kang Lan | Director | 1 | −70.2% (1) | 0% | 0 | — | April 29, 2025 |
| Klinsky Steven B | 10% owner | 0 | — | — | 1 | +29.2% (1) | May 28, 2020 |
| Ligner Emmanuel | President and CEO | 1 | — | — | 0 | — | November 17, 2025 |
| Massaro Joseph R | Director | 1 | −70.2% (1) | 0% | 0 | — | April 29, 2025 |
| Miller Justin | EVP & General Counsel | 0 | — | — | 1 | +58.6% (1) | September 9, 2020 |
| New Mountain Capital Group, L.P. | 10% owner | 0 | — | — | 1 | +50.8% (1) | August 25, 2020 |
| New Mountain Partners III LP | 10% owner | 0 | — | — | 1 | +12.6% (1) | November 10, 2020 |
| Peacock Jonathan M | Director | 1 | −70.2% (1) | 0% | 0 | — | April 29, 2025 |
| Shaw Christi | Director | 0 | — | — | 1 | +15.8% (1) | December 15, 2020 |
| Stubblefield Michael | CEO | 1 | −21.4% (1) | 0% | 0 | — | November 17, 2022 |
| Szlosek Thomas A | EVP & CFO | 1 | −21.4% (1) | 0% | 0 | — | November 17, 2022 |
When several insiders traded Avantor, Inc.
Months when 2 or more insiders became net buyers, or 3 or more net sellers, of Avantor, Inc. in reports dated in the 91 days before the month end, and how the stock did against the S&P 500 from that month end. After the 3 buying crowds with six months of prices, it averaged −28.9% against the index. After 2 selling crowds, +15.2%. One company's history is too short to judge by; the test across every company is the better guide.
| Month | Crowd | 3 months on, vs S&P 500 | 6 months | 12 months |
|---|---|---|---|---|
| November 28, 2025 | 2 buying | −25.0% | −35.1% | not yet |
| April 30, 2025 | 4 buying | −10.9% | −35.5% | −70.2% |
| November 30, 2022 | 2 buying | +13.1% | −16.0% | −18.4% |
| May 28, 2021 | 7 selling | +14.6% | +13.3% | +2.4% |
| May 29, 2020 | 5 selling | +0.2% | +17.1% | +29.2% |