AVTR Insider Trading

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Insider Trading History
Frequently Asked Questions
About

Insider Ownership Percentage: 1.20%

Insider Buying (Last 12 Months): $2,152,630.00

Insider Selling (Last 12 Months): $191,489.09

Avantor Insider Trading History Chart

Avantor Share Price & Price History

^$11.14

▼ -0.155 (-1.37%)

As of 12/4/2025 04:59 PM ET

Days: 30 | 90 | 365

Avantor Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
10/30/2025	Gregory L. Summe	Director	Buy	100,000	$11.25	$1,125,000.00	300,000
8/5/2025	Steven W. Eck	CAO	Sell	3,476	$11.39	$39,591.64	55,068
5/23/2025	Gregory L. Summe	Director	Buy	30,000	$12.50	$375,000.00	100,000
5/22/2025	Gregory L. Summe	Director	Buy	20,000	$12.65	$253,000.00	70,000
5/7/2025	Gregory L. Summe	Director	Buy	25,000	$12.00	$300,000.00	50,000
4/29/2025	Joseph R. Massaro	Director	Buy	8,100	$12.30	$99,630.00	35,038
2/26/2025	James Bramwell	EVP	Sell	3,758	$17.53	$65,877.74	87,379
2/26/2025	Steven W. Eck	CAO	Sell	4,907	$17.53	$86,019.71	40,604
9/5/2024	Steven W. Eck	CAO	Sell	3,525	$25.06	$88,336.50	29,544
2/27/2024	James Bramwell	EVP	Sell	6,203	$24.49	$151,911.47	101,143
9/7/2023	Steven W. Eck	CAO	Sell	7,577	$20.64	$156,389.28	28,187
8/25/2023	Frederic Vanderhaegen	EVP	Sell	25,000	$21.47	$536,750.00	160,735
4/11/2023	Christophe Couturier	EVP	Sell	1,498	$21.18	$31,727.64	98,650
3/3/2023	Gerard Brophy	EVP	Sell	3,914	$25.00	$97,850.00	108,715
2/23/2023	Christophe Couturier	EVP	Sell	3,078	$24.24	$74,610.72	94,370
2/2/2023	Gerard Brophy	EVP	Sell	11,339	$25.06	$284,155.34	102,385

SEC Filings (Institutional Ownership Changes) for Avantor (NYSE:AVTR)

95.08% of Avantor stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

Avantor Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
12/2/2025	Swiss Life Asset Management Ltd	32,023	$0.40M	0.0%	-69.8%	0.005%
11/24/2025	Manhattan West Asset Management LLC	223,392	$2.79M	0.6%	+65.3%	0.033%
11/20/2025	Voss Capital LP	4,525,000	$56.47M	2.7%	+905.6%	0.664%
11/19/2025	Coldstream Capital Management Inc.	13,770	$0.17M	0.0%	N/A	0.002%
11/19/2025	Danica Pension Livsforsikringsaktieselskab	63,072	$0.79M	0.0%	N/A	0.009%
11/19/2025	Danske Bank A S	6,800	$85K	0.0%	N/A	0.001%
11/19/2025	Caitong International Asset Management Co. Ltd	14,682	$0.18M	0.1%	+217.9%	0.002%
11/18/2025	Advisory Services Network LLC	22,764	$0.28M	0.0%	+36.6%	0.003%
11/17/2025	Armistice Capital LLC	25,360	$0.32M	0.0%	N/A	0.004%
11/17/2025	CANADA LIFE ASSURANCE Co	430,201	$5.09M	0.0%	-14.4%	0.063%
11/17/2025	Woodline Partners LP	1,628,501	$20.32M	0.1%	-56.8%	0.239%
11/17/2025	XTX Topco Ltd	143,973	$1.80M	0.1%	N/A	0.021%
11/17/2025	Voleon Capital Management LP	10,402	$0.13M	0.0%	N/A	0.002%
11/17/2025	Verition Fund Management LLC	362,391	$4.52M	0.0%	-14.3%	0.053%
11/17/2025	Sapience Investments LLC	43,560	$0.54M	2.1%	+20.4%	0.006%
11/17/2025	Scientech Research LLC	53,529	$0.67M	0.2%	-19.1%	0.008%
11/17/2025	Shelton Capital Management	16,295	$0.20M	0.0%	-33.3%	0.002%
11/17/2025	Quarry LP	3,858	$48K	0.0%	-49.0%	0.001%
11/17/2025	Prelude Capital Management LLC	17,000	$0.21M	0.0%	N/A	0.002%
11/17/2025	Public Employees Retirement System of Ohio	206,386	$2.58M	0.0%	+0.6%	0.030%
11/17/2025	Northern Trust Corp	5,561,017	$69.40M	0.0%	-14.6%	0.816%
11/17/2025	Mercer Global Advisors Inc. ADV	80,592	$1.01M	0.0%	+3.6%	0.012%
11/17/2025	Millennium Management LLC	2,702,510	$33.73M	0.0%	+20,885.5%	0.396%
11/17/2025	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	4,123	$49K	0.0%	+28.1%	0.001%
11/17/2025	Moore Capital Management LP	293,594	$3.66M	0.1%	-62.3%	0.043%
11/17/2025	London Co. of Virginia	12,793,957	$159.67M	0.9%	N/A	1.876%
11/17/2025	Jain Global LLC	38,768	$0.48M	0.0%	N/A	0.006%
11/17/2025	Kinney Asset Management LLC	1,845,000	$23.03M	34.3%	+34.2%	0.271%
11/17/2025	HighVista Strategies LLC	172,400	$2.15M	0.5%	N/A	0.025%
11/17/2025	Holocene Advisors LP	5,493,677	$68.56M	0.2%	+278.0%	0.806%
11/17/2025	Gotham Asset Management LLC	1,047,534	$13.07M	0.1%	+99.4%	0.154%
11/17/2025	Dean Capital Management	92,349	$1.15M	0.4%	N/A	0.014%
11/17/2025	Earnest Partners LLC	6,196,712	$77.34M	0.3%	+1.6%	0.909%
11/17/2025	Brevan Howard Capital Management LP	25,236	$0.32M	0.0%	N/A	0.004%
11/17/2025	California Public Employees Retirement System	934,521	$11.66M	0.0%	+0.6%	0.137%
11/17/2025	Bank of America Corp DE	6,969,143	$86.98M	0.0%	-7.0%	1.022%
11/17/2025	Bank of Nova Scotia	31,474	$0.39M	0.0%	-47.9%	0.005%
11/17/2025	Alliancebernstein L.P.	858,525	$10.71M	0.0%	-1.1%	0.126%
11/17/2025	Ameriprise Financial Inc.	1,499,771	$18.72M	0.0%	-4.9%	0.220%
11/14/2025	Schonfeld Strategic Advisors LLC	300,029	$3.74M	0.0%	+242.4%	0.044%
11/14/2025	Creative Planning	77,760	$0.97M	0.0%	+38.8%	0.011%
11/14/2025	Lazard Asset Management LLC	232,762	$2.91M	0.0%	-8.6%	0.034%
11/14/2025	SummitTX Capital L.P.	73,800	$0.92M	0.0%	N/A	0.011%
11/14/2025	Raymond James Financial Inc.	1,818,028	$22.69M	0.0%	+2.9%	0.267%
11/14/2025	Bellevue Group AG	103,362	$1.29M	0.0%	N/A	0.015%
11/14/2025	Amundi	77,036	$0.96M	0.0%	-95.6%	0.011%
11/14/2025	California State Teachers Retirement System	641,338	$8M	0.0%	-46.1%	0.094%
11/14/2025	ADAR1 Capital Management LLC	25,000	$0.31M	0.0%	+150.0%	0.004%
11/14/2025	Zurcher Kantonalbank Zurich Cantonalbank	135,014	$1.69M	0.0%	-13.2%	0.020%
11/14/2025	Brooklyn Investment Group	22,865	$0.29M	0.0%	+111.7%	0.003%
11/14/2025	UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC	2,380,992	$29.72M	0.0%	-63.1%	0.349%
11/14/2025	Two Sigma Investments LP	282,882	$3.53M	0.0%	-0.9%	0.041%
11/14/2025	Squarepoint Ops LLC	165,112	$2.06M	0.0%	+8.2%	0.024%
11/14/2025	Arrowpoint Investment Partners Singapore Pte. Ltd.	37,925	$0.47M	0.5%	N/A	0.006%
11/14/2025	Comerica Bank	424,356	$5.30M	0.0%	+45.3%	0.062%
11/14/2025	Zuckerman Investment Group LLC	1,723,522	$21.51M	2.0%	-3.4%	0.253%
11/14/2025	Private Management Group Inc.	1,633,287	$20.38M	0.6%	+20.7%	0.240%
11/14/2025	Brown Brothers Harriman & Co.	38,500	$0.48M	0.0%	-98.7%	0.006%
11/14/2025	Broyhill Asset Management LLC	283,884	$3.54M	3.1%	-22.1%	0.042%
11/14/2025	Dodge & Cox	117,746,888	$1.47B	0.8%	+0.3%	17.269%
11/14/2025	FORA Capital LLC	37,199	$0.46M	0.1%	-36.6%	0.005%
11/14/2025	Glenmede Investment Management LP	69,658	$0.87M	0.0%	+451.0%	0.010%
11/13/2025	Pathstone Holdings LLC	114,329	$1.43M	0.0%	-14.6%	0.017%
11/13/2025	Entropy Technologies LP	167,725	$2.09M	0.2%	+112.9%	0.025%
11/13/2025	Medina Value Partners LLC	781,188	$9.75M	2.3%	+5.5%	0.115%
11/13/2025	Eschler Asset Management LLP	50,000	$0.62M	0.5%	N/A	0.007%
11/13/2025	Quantitative Investment Management LLC	29,932	$0.37M	0.1%	N/A	0.004%
11/13/2025	Arrowstreet Capital Limited Partnership	649,886	$8.11M	0.0%	+423.8%	0.095%
11/13/2025	Invesco Ltd.	16,053,368	$200.35M	0.0%	+0.8%	2.354%
11/13/2025	Sei Investments Co.	4,563,468	$56.95M	0.1%	+3.6%	0.669%
11/13/2025	Connor Clark & Lunn Investment Management Ltd.	816,705	$10.19M	0.0%	-30.4%	0.120%
11/13/2025	BNP Paribas Financial Markets	102,462	$1.28M	0.0%	-73.3%	0.015%
11/13/2025	Barrow Hanley Mewhinney & Strauss LLC	34,548,129	$431.16M	1.4%	+10.8%	5.067%
11/13/2025	Mackenzie Financial Corp	32,219	$0.40M	0.0%	-64.3%	0.005%
11/13/2025	Franklin Resources Inc.	1,146,256	$14.31M	0.0%	-0.7%	0.168%
11/13/2025	Quadrant Capital Group LLC	35,262	$0.44M	0.0%	-27.5%	0.005%
11/13/2025	Legal & General Group Plc	1,137,490	$14.20M	0.0%	-63.3%	0.167%
11/13/2025	Vestcor Inc	50,388	$0.63M	0.0%	+191.9%	0.007%
11/13/2025	Clarkston Capital Partners LLC	15,020,325	$187.45M	4.0%	+7.4%	2.203%
11/13/2025	Swiss National Bank	1,320,600	$16.48M	0.0%	-36.0%	0.194%
11/13/2025	WINTON GROUP Ltd	409,558	$5.11M	0.2%	+797.6%	0.060%
11/13/2025	Russell Investments Group Ltd.	1,455,140	$17.38M	0.0%	+1.2%	0.213%
11/13/2025	Diversify Advisory Services LLC	11,452	$0.13M	0.0%	N/A	0.002%
11/13/2025	B. Metzler seel. Sohn & Co. AG	125,444	$1.57M	0.0%	-21.6%	0.018%
11/13/2025	Dynamic Technology Lab Private Ltd	38,110	$0.48M	0.1%	N/A	0.006%
11/13/2025	Meiji Yasuda Asset Management Co Ltd.	15,841	$0.20M	0.0%	-11.3%	0.002%
11/13/2025	Natixis Advisors LLC	1,907,077	$23.80M	0.0%	+124.8%	0.280%
11/13/2025	First Trust Advisors LP	2,694,790	$33.63M	0.0%	+40.5%	0.395%
11/13/2025	HUB Investment Partners LLC	11,688	$0.15M	0.0%	N/A	0.002%
11/13/2025	Neo Ivy Capital Management	237,414	$2.96M	0.7%	+69.1%	0.035%
11/13/2025	Neuberger Berman Group LLC	138,264	$1.73M	0.0%	+23.9%	0.020%
11/12/2025	Gabelli Funds LLC	370,237	$4.62M	0.0%	-9.3%	0.054%
11/12/2025	Barclays PLC	1,117,158	$13.94M	0.0%	-64.3%	0.164%
11/12/2025	Orion Porfolio Solutions LLC	285,419	$3.56M	0.0%	+83.0%	0.042%
11/12/2025	Integrated Quantitative Investments LLC	15,714	$0.20M	0.1%	N/A	0.002%
11/12/2025	Skba Capital Management LLC	62,497	$0.78M	0.1%	+96.2%	0.009%
11/12/2025	Dimensional Fund Advisors LP	13,383,746	$167M	0.0%	+22.8%	1.963%
11/12/2025	Teachers Retirement System of The State of Kentucky	216,730	$2.70M	0.0%	-58.9%	0.032%
11/12/2025	Victory Capital Management Inc.	152,128	$1.90M	0.0%	-42.0%	0.022%
11/12/2025	CI Investments Inc.	8,836	$0.11M	0.0%	-27.8%	0.001%

Data available starting January 2016

Avantor, Inc. engages in the provision of mission-critical products and services to customers in the biopharma, healthcare, education and government, advanced technologies, and applied materials industries in the Americas, Europe, Asia, the Middle East, and Africa. The company offers materials and consumables, such as purity chemicals and reagents, lab products and supplies, formulated silicone materials, customized excipients, customized single-use assemblies, process chromatography resins and columns, analytical sample prep kits, education and microbiology products, clinical trial kits, peristaltic pumps, and fluid handling tips. It also provides equipment and instrumentation products, including filtration systems, virus inactivation systems, incubators, analytical instruments, evaporators, ultra-low-temperature freezers, biological safety cabinets, and critical environment supplies. In addition, the company offers services and specialty procurements comprising onsite lab and production, clinical, equipment, procurement and sourcing, and biopharmaceutical material scale-up and development services. Further, it provides scientific research support services, such as DNA extraction, bioreactor servicing, clinical and biorepository, and compound management services. The company was founded in 1904 and is headquartered in Radnor, Pennsylvania.

Today's Range

Now: $11.14

$10.97

$11.33

50 Day Range

MA: $12.68

$10.89

$15.61

52 Week Range

Now: $11.14

$10.82

$23.32

Volume

8,739,006 shs

Average Volume

7,631,528 shs

Market Capitalization

$7.59 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

0.93

Who are the company insiders with the largest holdings of Avantor?: Avantor's top insider shareholders include:
Gregory L Summe (Director)
James Bramwell (EVP)
Steven W Eck (CAO)
Joseph R Massaro (Director)
Learn More about top insider investors at Avantor.
Who are the major institutional investors of Avantor?: Avantor's top institutional shareholders include:
Dodge & Cox — 17.27%
Vanguard Group Inc. — 9.68%
Barrow Hanley Mewhinney & Strauss LLC — 5.07%
Greenhaven Associates Inc. — 2.69%
Invesco Ltd. — 2.35%
Clarkston Capital Partners LLC — 2.20%
Learn More about top institutional investors of Avantor stock.
Which major investors are selling Avantor stock?: Within the previous quarter, AVTR stock was sold by these institutional investors:
Bessemer Group Inc.
Close Asset Management Ltd
UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC
Brown Brothers Harriman & Co.
Woodline Partners LP
Barclays PLC
Legal & General Group Plc
Readystate Asset Management LP
Within the previous year, company insiders that have sold Avantor company stock include:
Gregory L Summe (Director)
James Bramwell (EVP)
Learn More investors selling Avantor stock.
Which major investors are buying Avantor stock?: During the previous quarter, AVTR stock was acquired by institutional investors including:
Greenhaven Associates Inc.
London Co. of Virginia
Voss Capital LP
Holocene Advisors LP
Barrow Hanley Mewhinney & Strauss LLC
Millennium Management LLC
Dimensional Fund Advisors LP
Massachusetts Financial Services Co. MA
In the last year, these company insiders have bought Avantor stock:
Gregory L Summe (Director)
James Bramwell (EVP)
Learn More investors buying Avantor stock.