Avantor AVTR Insider Ownership

NYSE AVTR

$16.67 +0.38 (+2.36%)

As of: Oct 20, 2026 · 1:40 PM EDT

Insider Holdings by Owner

7.53Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

1.01%

▼-0.0037% pp QoQ

Shares Held by Insiders

6.85Mn

filed for Sep 2026

▼-0.37% QoQ

Shares Outstanding

676.36Mn

676,358,840 shares

Direct Holdings

5.35Mn

Indirect: 1.51Mn

Net Shares Traded (QoQ)

-25.16K

net selling in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Across the past 12 months, open-market trades by Avantor insiders were all purchases, totaling $8.69 million (847.5K shares).

A count shows 5 insiders buying AVTR stock on the open market over the past 12 months and none selling.
Among AVTR's insiders, Sanjeev K. Mehra (Director) was the top open-market buyer in the past 12 months, with $4.88 million of stock purchased (475K shares) and the latest purchase on March 10, 2026.
Avantor's latest insider trade on the open market was a purchase of 10K shares for $83,200 by Gregory T. Lucier (Director) on May 8, 2026.
Apart from open-market trades, AVTR insiders received 1.43Mn shares in stock awards and gave up 73.07K shares to cover taxes or exercise prices in the past 12 months.
According to Business Quant data, insiders at Avantor reported 6.85Mn shares in total in their latest Form 4 filings, or 1.01% of the 676.36Mn shares outstanding; that total is down 0.37% from 6.88Mn shares at the end of Q2 2026 and up 55.67% from 4.4Mn shares at the end of Q3 2025.
By type of ownership, AVTR insiders hold 78.03% of their shares directly (5.35Mn shares) and 21.97% indirectly (1.51Mn shares).
AVTR's insider total is spread across 25 insiders who have filed a Form 4 in the past two years.
Avantor's top three insider holders by shares held are Michael Stubblefield (President & CEO, 1.76Mn shares), Emmanuel Ligner (President and CEO, 737.33K shares) and Sanjeev K. Mehra (Director, 508.38K shares).
Of the shares held by AVTR insiders, 25.75% belong to Michael Stubblefield.
In the past year, 18 insiders of Avantor submitted 38 Form 4 filings reporting trades, awards or other transactions.
The insider data for AVTR reflects Form 4 filings through September 22, 2026.

Form 4 Holdings

Insiders Holding AVTR

Insiders 38

Shares held 7.53Mn

Of outstanding 1.11%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Michael Stubblefield	President Ceo	1,219,013	545,500	1,764,513	23.4%	21 May, 2025
2	Rajiv Gupta	Director	780,562	0	780,562	10.4%	05 Apr, 2022
3	Emmanuel Ligner	President And Ceo	737,334	0	737,334	9.8%	20 Aug, 2026
4	R. Brent Jones	Evp, Chief Financial Officer	419,782	0	419,782	5.6%	25 Feb, 2026
5	Corey Walker	President, Vwr Dist. Servs.	384,535	0	384,535	5.1%	22 Jun, 2026
6	Benoit Gourdier	Evp, Bioscience Medtech	362,859	0	362,859	4.8%	25 Feb, 2026
7	Mary Blenn	Evp, Chief Operating Officer	253,384	0	253,384	3.4%	23 Feb, 2026
8	Claudius Sokenu	Evp, Chief Legal Compliance	251,228	0	251,228	3.3%	27 Jul, 2026
9	Brittany Hankamer	Evp, Chief Hr Officer	248,864	0	248,864	3.3%	18 Aug, 2026
10	Jonathan M Peacock	Director	219,815	0	219,815	2.9%	12 May, 2025
11	Christophe Couturier	Evp, Amea	211,271	0	211,271	2.8%	12 Aug, 2025
12	Frederic Vanderhaegen	Evp, Americas And Europe	160,735	0	160,735	2.1%	28 Aug, 2023
13	Ludovic Brellier	Evp, Bioscience Medtech	146,566	0	146,566	1.9%	05 May, 2026
14	Steven W Eck	Svp Chief Accounting Officer	129,593	0	129,593	1.7%	04 Aug, 2026
15	Michael Wondrasch	Evp Cio	96,072	0	96,072	1.3%	22 Feb, 2023
16	Gregory T Lucier	Director	34,006	60,000	94,006	1.2%	11 May, 2026
17	Justin Miller	Evp General Counsel	93,336	0	93,336	1.2%	19 May, 2023
18	Gerard Brophy	Evp, Biopharma Production	89,032	0	89,032	1.2%	19 May, 2023
19	James Bramwell	Evp Sales, Customer Excellence	86,605	0	86,605	1.1%	28 Feb, 2025
20	Michael Severino	Director	85,821	0	85,821	1.1%	11 May, 2026
21	Gregory L Summe	Director	83,381	0	83,381	1.1%	11 May, 2026
22	Thomas A Szlosek	Evp Cfo	77,489	0	77,489	1.0%	19 May, 2023
23	Joseph R Massaro	Director	77,408	0	77,408	1.0%	11 May, 2026
24	Sheri Lewis	Evp, Global Ops Supply Chain	70,692	0	70,692	0.9%	03 Jan, 2024
25	Mala Murthy	Director	69,479	0	69,479	0.9%	11 May, 2026
26	Randy Lee Stone	Evp, Laboratory Solutions	68,105	0	68,105	0.9%	18 Apr, 2024
27	Juan Andres	Director	65,480	0	65,480	0.9%	12 May, 2025
28	Lan Kang	Director	52,315	0	52,315	0.7%	12 May, 2025
29	Todd W Garner	Evp And Cfo	49,688	0	49,688	0.7%	22 Sep, 2026
30	Louise Makin	Director	47,140	0	47,140	0.6%	11 May, 2026
31	John Carethers	Director	45,858	0	45,858	0.6%	12 May, 2025
32	Kitty Sahin	Evp, Strategycorp Development	42,274	0	42,274	0.6%	22 Jul, 2024
33	Meghan Henson	Evp, Chief Hr Officer	40,184	0	40,184	0.5%	27 Feb, 2023
34	Christi Shaw	Director	36,271	0	36,271	0.5%	15 May, 2023
35	Sanjeev K Mehra	Director	33,376	0	33,376	0.4%	11 May, 2026
36	Simon Dingemans	Director	31,495	0	31,495	0.4%	11 May, 2026
37	Mark Christopher Murray	Evp, Biomaterials At	18,680	0	18,680	0.2%	18 Jan, 2022
38	Matthew S. Holt	Director	7,908	0	7,908	0.1%	16 May, 2022

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

692 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
21 Sep, 2026	Todd W Garner	Evp And Cfo	Acquired A	49,688	$0.00	$0	49,688	Direct
21 Sep, 2026	Todd W Garner	Evp And Cfo	Acquired A	138,632	$0.00	$0	138,632	Direct
18 Aug, 2026	Emmanuel Ligner	President And Ceo	Disposed F	29,803	$13.33	$397.27K	737,334	Direct
14 Aug, 2026	Brittany Hankamer	Evp, Chief Hr Officer	Disposed F	181	$13.66	$2.47K	248,864	Direct
31 Jul, 2026	Steven W Eck	Svp Chief Accounting Officer	Disposed F	1,385	$13.78	$19.09K	129,593	Direct
24 Jul, 2026	Claudius Sokenu	Evp, Chief Legal Compliance	Disposed F	1,201	$11.44	$13.74K	251,228	Direct
21 Jun, 2026	Corey Walker	President, Vwr Dist. Servs.	Disposed F	3,010	$9.58	$28.84K	384,535	Direct
07 May, 2026	Gregory T Lucier	Director	Acquired A	25,270	$0.00	$0	34,006	Direct
07 May, 2026	Louise Makin	Director	Acquired A	25,270	$0.00	$0	47,140	Direct
07 May, 2026	Joseph R Massaro	Director	Acquired A	25,270	$0.00	$0	77,408	Direct
07 May, 2026	Mala Murthy	Director	Acquired A	25,270	$0.00	$0	69,479	Direct
07 May, 2026	Michael Severino	Director	Acquired A	25,270	$0.00	$0	85,821	Direct
07 May, 2026	Sanjeev K Mehra	Director	Acquired A	25,270	$0.00	$0	33,376	Direct
07 May, 2026	Simon Dingemans	Director	Acquired A	25,270	$0.00	$0	31,495	Direct
07 May, 2026	Gregory L Summe	Director	Acquired A	25,270	$0.00	$0	83,381	Direct
08 May, 2026	Gregory T Lucier	Director	Acquired P	10,000	$8.32	$83.20K	60,000	Indirect
01 May, 2026	Ludovic Brellier	Evp, Bioscience Medtech	Acquired A	146,566	$0.00	$0	146,566	Direct
01 May, 2026	Ludovic Brellier	Evp, Bioscience Medtech	Acquired A	246,002	$0.00	$0	246,002	Direct
01 May, 2026	Simon Dingemans	Director	Acquired P	25,000	$8.14	$203.50K	25,000	Indirect
03 Apr, 2026	Steven W Eck	Svp Chief Accounting Officer	Acquired A	31,645	$0.00	$0	130,978	Direct

Showing 1 to 20 of 692 transactions