Avantor Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

BST:AVG Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
17 Nov 25	Buy€856,272	Emmanuel Ligner	Individual	87,500	€9.79
30 Oct 25	Buy€972,900	Gregory Summe	Individual	100,000	€9.73
21 Aug 25	Buy€1,081,542	Gregory Summe	Individual	100,000	€10.82
05 Aug 25	Sell€34,195	Steven Eck	Individual	3,476	€9.84
23 May 25	Buy€330,863	Gregory Summe	Individual	30,000	€11.03
22 May 25	Buy€224,234	Gregory Summe	Individual	20,000	€11.21
07 May 25	Buy€264,330	Gregory Summe	Individual	25,000	€10.57
29 Apr 25	Buy€87,395	Joseph Massaro	Individual	8,100	€10.79
28 Apr 25	Buy€274,656	Gregory Summe	Individual	25,000	€10.99
28 Apr 25	Buy€91,094	Jonathan Peacock	Individual	8,091	€11.26
28 Apr 25	Buy€55,239	Kang Lan	Individual	5,000	€11.05
27 Feb 25	Sell€99,541	Steven Eck	Individual	5,940	€16.85
27 Feb 25	Sell€75,953	James Bramwell	Individual	4,532	€16.85

Insider Trading Volume

Insider Buying: AVG insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of AVG?
Owner Type	Number of Shares	Ownership Percentage
State or Government	886,916	0.127%
Individual Insiders	2,866,235	0.41%
Private Companies	14,000,111	2%
Institutions	680,929,195	97.5%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 77.59% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
17.3%	Dodge & Cox	117,746,888	€1.1b	0.27%	0.36%
9.68%	The Vanguard Group, Inc.	65,988,977	€619.6m	1.75%	0.01%
8.91%	BlackRock, Inc.	60,716,987	€570.1m	-15.6%	0.01%
5.07%	Barrow, Hanley, Mewhinney & Strauss, LLC	34,548,129	€324.4m	10.8%	1.01%
4.91%	T. Rowe Price Group, Inc.	33,465,870	€314.2m	-41.3%	0.03%
2.99%	State Street Global Advisors, Inc.	20,365,770	€191.2m	-13.3%	0.01%
2.89%	Engine Capital Management, LP	19,720,430	€185.2m	258%	23.15%
2.69%	Greenhaven Associates Inc	18,311,570	€171.9m	0%	2.95%
2.2%	Clarkston Capital Partners, LLC	15,020,325	€141.0m	7.43%	3.53%
2.05%	New Mountain Capital Group, L.P.	14,000,000	€131.5m	0%	no data
1.96%	Dimensional Fund Advisors LP	13,383,746	€125.7m	22.8%	0.02%
1.88%	The London Company of Virginia, LLC	12,793,957	€120.1m	0%	0.76%
1.8%	Geode Capital Management, LLC	12,295,686	€115.5m	3.28%	0.01%
1.76%	Manulife Asset Management	12,006,252	€112.7m	-24.6%	0.09%
1.6%	Invesco Ltd.	10,938,374	€102.7m	0.1%	0.03%
1.18%	Norges Bank Investment Management	8,036,188	€75.5m	0%	0.01%
1.17%	Citadel Advisors LLC	7,972,934	€74.9m	186%	0.07%
1.16%	RobecoSAM AG	7,920,177	€74.4m	-9.25%	0.94%
1.1%	Massachusetts Financial Services Company	7,502,086	€70.4m	28%	0.02%
1.06%	FMR LLC	7,252,416	€68.1m	12.3%	no data
0.96%	UBS Asset Management AG	6,538,896	€61.4m	-47.9%	0.01%
0.91%	EARNEST Partners, LLC	6,196,712	€58.2m	1.63%	0.28%
0.82%	Northern Trust Global Investments	5,561,017	€52.2m	-14.6%	0.01%
0.81%	Holocene Advisors, LP	5,493,677	€51.6m	278%	0.13%
0.77%	Managed Account Advisors LLC	5,253,923	€49.3m	0.09%	0.01%

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2025/12/08 19:56
End of Day Share Price	2025/12/05 00:00
Earnings	2025/09/30
Annual Earnings	2024/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Avantor, Inc. is covered by 32 analysts. 16 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
Catherine Ramsey Schulte	Baird
Luke Sergott	Barclays
Michael Ryskin	BofA Global Research