Avantor, Inc. (AVTR) Insider Trading
Over the last 3 months, AVTR insiders made 2 open-market buys and 0 sales, a net purchase of $287K (SEC Form 4). Multiple insiders bought within days of each other (cluster buying). Over the last 6 months, 301 institutions increased and 330 reduced their position (13F).
Insider Activity
Sentiment
100/100
Buys (3m)
2
Sells (3m)
0
Net (3m)
$286.7K
Insiders buyingCluster buying
Insider trades by month Buys Sells
Oct
Nov
Dec
Feb
Mar
May
Context3-month price +32.1%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 22, 2026 | Walker Coreyofficer: President, VWR Dist. & Servs. | Tax | 3,010 | $9.58 |
| May 11, 2026 | SUMME GREGORY Ldirector | Grant | 25,270 | — |
| May 11, 2026 | SEVERINO MICHAELdirector | Grant | 25,270 | — |
| May 11, 2026 | MEHRA SANJEEV Kdirector | Grant | 25,270 | — |
| May 11, 2026 | LUCIER GREGORY Tdirector | Buy | 10,000 | $8.32 |
| May 11, 2026 | Massaro Joseph Rdirector | Grant | 25,270 | — |
| May 11, 2026 | LUCIER GREGORY Tdirector | Grant | 25,270 | — |
| May 11, 2026 | Dingemans Simondirector | Grant | 25,270 | — |
| May 11, 2026 | Murthy Maladirector | Grant | 25,270 | — |
| May 11, 2026 | Makin Louisedirector | Grant | 25,270 | — |
| May 5, 2026 | Brellier Ludovicofficer: EVP, Bioscience & Medtech | Grant | 146,566 | — |
| May 5, 2026 | Brellier Ludovicofficer: EVP, Bioscience & Medtech | Grant | 246,002 | $8.76 |
| May 5, 2026 | Dingemans Simondirector | Buy | 25,000 | $8.14 |
| Apr 6, 2026 | Eck Steven Wofficer: SVP & Chief Accounting Officer | Grant | 31,645 | — |
| Mar 11, 2026 | MEHRA SANJEEV Kdirector | Buy | 125,000 | $8.01 |
| Feb 25, 2026 | Gourdier Benoitofficer: EVP, Bioscience & Medtech | Tax | 3,029 | $8.89 |
| Feb 25, 2026 | Jones R. Brentofficer: EVP, Chief Financial Officer | Tax | 2,805 | $8.89 |
| Feb 25, 2026 | Hankamer Brittanyofficer: EVP, Chief HR Officer | Tax | 359 | $9.11 |
| Feb 25, 2026 | Eck Steven Wofficer: SVP & Chief Accounting Officer | Tax | 2,017 | $8.89 |
| Feb 25, 2026 | Eck Steven Wofficer: SVP & Chief Accounting Officer | Tax | 452 | $9.11 |
| Feb 25, 2026 | Hankamer Brittanyofficer: EVP, Chief HR Officer | Tax | 1,324 | $8.89 |
| Feb 25, 2026 | Sokenu Claudiusofficer: EVP, Chief Legal & Compliance | Tax | 2,376 | $8.89 |
| Feb 23, 2026 | Gourdier Benoitofficer: EVP, Bioscience & Medtech | Grant | 528,848 | $11.05 |
| Feb 23, 2026 | Ligner Emmanueldirector, officer: President and CEO | Grant | 483,713 | — |
| Feb 23, 2026 | LUCIER GREGORY Tdirector | Buy | 50,000 | $9.16 |
| Feb 23, 2026 | Eck Steven Wofficer: SVP & Chief Accounting Officer | Grant | 48,859 | — |
| Feb 23, 2026 | Hankamer Brittanyofficer: EVP, Chief HR Officer | Grant | 317,310 | $11.05 |
| Feb 23, 2026 | Gourdier Benoitofficer: EVP, Bioscience & Medtech | Grant | 134,364 | — |
| Feb 23, 2026 | Walker Coreyofficer: President, VWR Dist. & Servs. | Grant | 634,617 | $11.05 |
| Feb 23, 2026 | Jones R. Brentofficer: EVP, Chief Financial Officer | Grant | 161,237 | — |
Source: AVTR SEC Form 4 filings, latest Jun 22, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their AVTR positions over the last 6 months (SEC Form 13F).
Increased
301
New positions
144
Reduced
330
Sold out
173
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| DODGE & COX | Increased | 119.6M | May 14, 2026 |
| DODGE & COX | Reduced | 117.1M | Feb 13, 2026 |
| BLACKROCK, INC. | Increased | 65.7M | May 13, 2026 |
| VANGUARD GROUP INC | Reduced | 64.9M | Jan 29, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 61.2M | May 15, 2026 |
| BLACKROCK, INC. | Reduced | 59.6M | Feb 12, 2026 |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC | Reduced | 33.3M | Feb 11, 2026 |
| T. ROWE PRICE INVESTMENT MANAGEMENT, INC. | Reduced | 32.1M | Feb 19, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 31.3M | May 8, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | Increased | 24.2M | May 15, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | Increased | 23.4M | Feb 17, 2026 |
| GREENHAVEN ASSOCIATES INC | Increased | 22.6M | Apr 6, 2026 |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC | Reduced | 22.4M | May 13, 2026 |
| STATE STREET CORP | Increased | 20.7M | May 15, 2026 |
| GREENHAVEN ASSOCIATES INC | Increased | 20.5M | Jan 7, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.