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AVTR Insider Trading

Insider Ownership Percentage: 0.28%
Insider Buying (Last 12 Months): $7,692,450.00
Insider Selling (Last 12 Months): $0.00

Avantor Insider Trading History Chart

This chart shows the insider buying and selling history at Avantor by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

Avantor Share Price & Price History

Current Price: $15.58
Price Change: ▲ Price Increase of +0.137 (0.89%)
As of 09/16/2026 03:59 PM ET

This chart shows the closing price history over time for AVTR up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

Avantor Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
5/8/2026Gregory T LucierDirectorBuy10,000$8.32$83,200.0060,000View SEC Filing Icon  
5/1/2026Simon DingemansDirectorBuy25,000$8.14$203,500.0025,000View SEC Filing Icon  
3/10/2026Sanjeev K MehraDirectorBuy125,000$8.01$1,001,250.00475,000View SEC Filing Icon  
2/19/2026Gregory T LucierDirectorBuy50,000$9.16$458,000.0050,000View SEC Filing Icon  
2/12/2026Gregory L. SummeDirectorBuy100,000$9.40$940,000.00400,000View SEC Filing Icon  
12/5/2025Sanjeev K MehraDirectorBuy350,000$11.09$3,881,500.00350,000View SEC Filing Icon  
10/30/2025Gregory L. SummeDirectorBuy100,000$11.25$1,125,000.00300,000View SEC Filing Icon  
8/5/2025Steven W. EckCAOSell3,476$11.39$39,591.6455,068View SEC Filing Icon  
5/23/2025Gregory L. SummeDirectorBuy30,000$12.50$375,000.00100,000View SEC Filing Icon  
5/22/2025Gregory L. SummeDirectorBuy20,000$12.65$253,000.0070,000View SEC Filing Icon  
5/7/2025Gregory L. SummeDirectorBuy25,000$12.00$300,000.0050,000View SEC Filing Icon  
4/29/2025Joseph R. MassaroDirectorBuy8,100$12.30$99,630.0035,038View SEC Filing Icon  
2/26/2025James BramwellEVPSell3,758$17.53$65,877.7487,379View SEC Filing Icon  
2/26/2025Steven W. EckCAOSell4,907$17.53$86,019.7140,604View SEC Filing Icon  
9/5/2024Steven W. EckCAOSell3,525$25.06$88,336.5029,544View SEC Filing Icon  
2/27/2024James BramwellEVPSell6,203$24.49$151,911.47101,143View SEC Filing Icon  
See Full Table

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

This chart shows the instiutional buying and selling at AVTR by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

Avantor Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
9/9/2026Sequoia Financial Advisors LLC22,739$0.23M0.0%+100.1%0.003%Search for SEC Filing on Google Icon
9/9/2026WINTON GROUP Ltd10,300$0.10M0.0%-84.9%0.002%Search for SEC Filing on Google Icon
9/9/2026Engineers Gate Manager LP54,570$0.54M0.0%+362.5%0.008%Search for SEC Filing on Google Icon
9/9/2026Cidel Asset Management Inc.11,299$0.11M0.0%N/A0.002%Search for SEC Filing on Google Icon
9/9/2026Integrated Wealth Concepts LLC12,912$0.13M0.0%N/A0.002%Search for SEC Filing on Google Icon
9/9/2026IFP Advisors Inc5,858$58K0.0%+901.4%0.001%Search for SEC Filing on Google Icon
9/9/2026Squarepoint Ops LLC1,006,446$9.96M0.0%+418.1%0.149%Search for SEC Filing on Google Icon
9/8/2026Allworth Financial LP16,512$0.16M0.0%+663.4%0.002%Search for SEC Filing on Google Icon
9/8/2026Arizona State Retirement System181,895$1.80M0.0%-2.9%0.027%Search for SEC Filing on Google Icon
9/8/2026Nykredit A S13,287$0.13M0.0%N/A0.002%Search for SEC Filing on Google Icon
8/27/2026Corient Private Wealth LP1,760,605$17.43M0.0%+176.2%0.260%Search for SEC Filing on Google Icon
8/26/2026Amundi515,503$5.10M0.0%-3.0%0.076%Search for SEC Filing on Google Icon
8/26/2026HighTower Advisors LLC85,072$0.84M0.0%+3.4%0.013%Search for SEC Filing on Google Icon
8/25/2026VIRGINIA RETIREMENT SYSTEMS ET Al194,100$1.92M0.0%N/A0.029%Search for SEC Filing on Google Icon
8/23/2026HB Wealth Management LLC28,137$0.28M0.0%N/A0.004%Search for SEC Filing on Google Icon
8/22/2026AlphaGrep UK Ltd15,752$0.16M0.0%N/A0.002%Search for SEC Filing on Google Icon
8/22/2026Syon Capital LLC23,415$0.23M0.0%+112.4%0.003%Search for SEC Filing on Google Icon
8/21/2026AXQ Capital LP32,254$0.32M0.0%-80.0%0.005%Search for SEC Filing on Google Icon
8/21/2026Nykredit A S13,287$0.13M0.0%N/A0.002%Search for SEC Filing on Google Icon
8/20/2026Straightline Group LLC28,179$0.28M0.1%N/A0.004%Search for SEC Filing on Google Icon
8/20/2026Private Management Group Inc.3,097,234$30.66M0.8%+13.3%0.458%Search for SEC Filing on Google Icon
8/20/2026Greenleaf Trust20,108$0.20M0.0%N/A0.003%Search for SEC Filing on Google Icon
8/19/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC2,027,738$20.08M0.0%-5.5%0.300%Search for SEC Filing on Google Icon
8/19/2026Hsbc Holdings PLC33,534$0.33M0.0%+8.0%0.005%Search for SEC Filing on Google Icon
8/18/2026North Star Asset Management Inc.138,877$1.38M0.1%N/A0.021%Search for SEC Filing on Google Icon
8/18/2026Empowered Funds LLC25,594$0.25M0.0%N/A0.004%Search for SEC Filing on Google Icon
8/18/2026United Capital Financial Advisors LLC25,124$0.25M0.0%N/A0.004%Search for SEC Filing on Google Icon
8/18/2026Public Employees Retirement System of Ohio187,865$1.86M0.0%N/A0.028%Search for SEC Filing on Google Icon
8/17/2026Corient Private Wealth LP1,722,983$17.06M0.0%N/A0.255%Search for SEC Filing on Google Icon
8/17/2026Bank of America Corp DE10,989,344$108.80M0.0%N/A1.625%Search for SEC Filing on Google Icon
8/15/2026Freestone Grove Partners LP5,714,884$56.58M0.4%N/A0.845%Search for SEC Filing on Google Icon
8/15/2026Man Group plc990,477$9.81M0.0%N/A0.146%Search for SEC Filing on Google Icon
8/15/2026Jupiter Topco LLC307,978$3.05M0.0%N/A0.046%Search for SEC Filing on Google Icon
8/14/2026ADAR1 Capital Management LLC130,000$1.29M0.1%N/A0.019%Search for SEC Filing on Google Icon
8/14/2026Hsbc Holdings PLC33,534$0.33M0.0%N/A0.005%Search for SEC Filing on Google Icon
8/14/2026EFG International AG87,500$0.87M0.0%N/A0.013%Search for SEC Filing on Google Icon
8/14/2026Canada Pension Plan Investment Board241,800$2.39M0.0%N/A0.036%Search for SEC Filing on Google Icon
8/14/2026Legal & General Group Plc888,490$8.80M0.0%N/A0.131%Search for SEC Filing on Google Icon
8/14/2026The Manufacturers Life Insurance Company953,968$9.44M0.0%N/A0.141%Search for SEC Filing on Google Icon
8/14/2026Algert Global LLC576,390$5.71M0.1%-8.6%0.085%Search for SEC Filing on Google Icon
8/13/2026Sanctuary Advisors LLC63,333$0.63M0.0%N/A0.009%Search for SEC Filing on Google Icon
8/13/2026Connor Clark & Lunn Investment Management Ltd.388,392$3.85M0.0%N/A0.057%Search for SEC Filing on Google Icon
8/13/2026Meiji Yasuda Asset Management Co Ltd.15,889$0.16M0.0%N/A0.002%Search for SEC Filing on Google Icon
8/13/2026Barrow Hanley Mewhinney & Strauss LLC19,735,968$195.39M0.6%N/A2.918%Search for SEC Filing on Google Icon
8/12/2026Quantbot Technologies LP19,791$0.20M0.0%N/A0.003%Search for SEC Filing on Google Icon
8/12/2026Evolve Private Wealth LLC14,040$0.14M0.0%N/A0.002%Search for SEC Filing on Google Icon
8/12/2026Callan Family Office LLC204,134$2.02M0.0%N/A0.030%Search for SEC Filing on Google Icon
8/12/2026Manhattan West Asset Management LLC224,212$2.22M0.4%N/A0.033%Search for SEC Filing on Google Icon
8/11/2026Allworth Financial LP16,512$0.16M0.0%N/A0.002%Search for SEC Filing on Google Icon
8/11/2026Advisors Capital Management LLC441,317$4.37M0.0%N/A0.065%Search for SEC Filing on Google Icon
8/11/2026Vise Technologies Inc.73,825$0.73M0.0%N/A0.011%Search for SEC Filing on Google Icon
8/11/2026Western Standard LLC2,109,984$20.89M7.1%N/A0.312%Search for SEC Filing on Google Icon
8/10/2026NewEdge Wealth LLC13,800$0.14M0.0%N/A0.002%Search for SEC Filing on Google Icon
8/10/2026Danica Pension Livsforsikringsaktieselskab63,072$0.62M0.0%N/A0.009%Search for SEC Filing on Google Icon
8/10/2026Diversify Advisory Services LLC33,469$0.39M0.0%N/A0.005%Search for SEC Filing on Google Icon
8/8/2026Meeder Advisory Services Inc.24,941$0.25M0.0%N/A0.004%Search for SEC Filing on Google Icon
8/7/2026Citizens Financial Group Inc. RI23,150$0.23M0.0%N/A0.003%Search for SEC Filing on Google Icon
8/7/2026BlackRock Inc.70,281,231$695.78M0.0%N/A10.391%Search for SEC Filing on Google Icon
8/7/2026Deutsche Bank AG190,914$1.89M0.0%N/A0.028%Search for SEC Filing on Google Icon
8/7/2026OneDigital Investment Advisors LLC142,922$1.42M0.0%N/A0.021%Search for SEC Filing on Google Icon
8/7/2026Diamond Hill Capital Management LLC Investment Advisor1,046,390$10.36M0.1%N/A0.155%Search for SEC Filing on Google Icon
8/6/2026Bank of New York Mellon Corp4,121,222$40.80M0.0%N/A0.609%Search for SEC Filing on Google Icon
8/6/2026State of Wyoming7,473$74K0.0%N/A0.001%Search for SEC Filing on Google Icon
8/6/2026GSA Capital Partners LLP80,841$0.80M0.1%N/A0.012%Search for SEC Filing on Google Icon
8/3/2026Oppenheimer Asset Management Inc.81,327$0.81M0.0%N/A0.012%Search for SEC Filing on Google Icon
7/10/2026Handelsbanken Fonder AB278,500$2.76M0.0%+41.2%0.041%Search for SEC Filing on Google Icon
7/9/2026First Bank & Trust26,696$0.26M0.0%-18.4%0.004%Search for SEC Filing on Google Icon
7/8/2026Assenagon Asset Management S.A.556,871$5.51M0.0%+425.0%0.082%Search for SEC Filing on Google Icon
7/7/2026GAMMA Investing LLC46,592$0.46M0.0%+93.3%0.007%Search for SEC Filing on Google Icon
7/2/2026Versant Capital Management Inc9,073$90K0.0%+372.1%0.001%Search for SEC Filing on Google Icon
6/18/2026Pacer Advisors Inc.78,486$0.62M0.0%-28.3%0.011%Search for SEC Filing on Google Icon
6/16/2026Empowered Funds LLC22,518$0.18M0.0%-15.9%0.003%Search for SEC Filing on Google Icon
6/3/2026Parallel Advisors LLC8,452$66K0.0%+21.4%0.001%Search for SEC Filing on Google Icon
5/22/2026Verus Capital Partners LLC14,147$0.11M0.0%N/A0.002%Search for SEC Filing on Google Icon
5/19/2026Bank of America Corp DE7,067,563$55.41M0.0%+24.3%1.035%Search for SEC Filing on Google Icon
5/19/2026Edgestream Partners L.P.418,095$3.28M0.1%+21.8%0.061%Search for SEC Filing on Google Icon
5/18/2026ADAR1 Capital Management LLC80,000$0.63M0.0%+14.3%0.012%Search for SEC Filing on Google Icon
5/18/2026Amundi531,575$4.17M0.0%+357.3%0.078%Search for SEC Filing on Google Icon
5/18/2026California State Teachers Retirement System785,799$6.16M0.0%+22.6%0.115%Search for SEC Filing on Google Icon
5/18/2026Readystate Asset Management LP788,250$6.18M0.3%-3.1%0.115%Search for SEC Filing on Google Icon
5/18/2026Royal Bank of Canada230,629$1.81M0.0%-21.6%0.034%Search for SEC Filing on Google Icon
5/18/2026Empowered Funds LLC22,518$0.18M0.0%-15.9%0.003%Search for SEC Filing on Google Icon
5/18/2026Engine Capital Management LP19,780,830$155.08M18.7%+65.8%2.897%Search for SEC Filing on Google Icon
5/18/2026Eversept Partners LP2,974,287$23.32M1.2%-6.4%0.436%Search for SEC Filing on Google Icon
5/16/2026The Manufacturers Life Insurance Company1,101,504$8.64M0.0%-87.4%0.161%Search for SEC Filing on Google Icon
5/16/2026Maverick Capital Ltd.100,814$0.79M0.0%N/A0.015%Search for SEC Filing on Google Icon
5/16/2026Quantinno Capital Management LP1,169,147$9.17M0.0%+187.4%0.171%Search for SEC Filing on Google Icon
5/16/2026Lazard Asset Management LLC81,813$0.64M0.0%N/A0.012%Search for SEC Filing on Google Icon
5/16/2026ABS Direct Equity Fund LLC75,000$0.59M0.5%-25.0%0.011%Search for SEC Filing on Google Icon
5/15/2026Weiss Asset Management LP527,903$4.14M0.1%-30.1%0.077%Search for SEC Filing on Google Icon
5/15/2026London Co. of Virginia10,852,257$85.08M0.5%-9.1%1.589%Search for SEC Filing on Google Icon
5/14/2026Gabelli Funds LLC110,500$0.87M0.0%-39.0%0.016%Search for SEC Filing on Google Icon
5/14/2026Public Employees Retirement System of Ohio192,289$1.51M0.0%-3.3%0.028%Search for SEC Filing on Google Icon
5/14/2026Caxton Associates LLP10,055$79K0.0%N/A0.001%Search for SEC Filing on Google Icon
5/14/2026Clarkston Capital Partners LLC8,629,389$67.65M5.2%-42.9%1.264%Search for SEC Filing on Google Icon
5/14/2026Bank of Nova Scotia41,600$0.33M0.0%-67.0%0.006%Search for SEC Filing on Google Icon
5/14/2026Sei Investments Co.5,287,850$41.46M0.0%+0.9%0.774%Search for SEC Filing on Google Icon
5/14/2026State of Wyoming34,905$0.27M0.0%+473.0%0.005%Search for SEC Filing on Google Icon
5/13/2026Cetera Investment Advisers38,569$0.30M0.0%+34.1%0.006%Search for SEC Filing on Google Icon
5/13/2026First Trust Advisors LP29,376$0.23M0.0%-98.6%0.004%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
Avantor logo
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.
Read More on Avantor

Today's Range

Now: $15.58
Low: $15.42
High: $15.82

50 Day Range

MA: $13.30
Low: $9.76
High: $15.46

52 Week Range

Now: $15.58
Low: $7.26
High: $15.93

Volume

10,552,109 shs

Average Volume

10,234,641 shs

Market Capitalization

$10.54 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

0.89

Who are the company insiders with the largest holdings of Avantor?

Avantor's top insider shareholders include:
  1. Michael Stubblefield (CEO)
  2. Rajiv Gupta (Director)
  3. Sanjeev K Mehra (Director)
  4. Gregory L Summe (Director)
  5. James Bramwell (EVP)
  6. Frederic Vanderhaegen (EVP)
  7. Gerard Brophy (EVP)
  8. Devashish Ohri (EVP)
  9. Michael Wondrasch (EVP)
  10. Justin Miller (EVP)
Learn More about top insider investors at Avantor.

Who are the major institutional investors of Avantor?

Avantor's top institutional shareholders include:
  1. BlackRock Inc. — 10.39%
  2. Barrow Hanley Mewhinney & Strauss LLC — 2.92%
  3. Bank of America Corp DE — 1.62%
  4. Freestone Grove Partners LP — 0.84%
  5. Bank of New York Mellon Corp — 0.61%
  6. Private Management Group Inc. — 0.46%
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:
  1. AXQ Capital LP
  2. UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
  3. WINTON GROUP Ltd
  4. Algert Global LLC
  5. California State Teachers Retirement System
  6. Amundi
  7. First Bank & Trust
  8. Arizona State Retirement System

Which major investors are buying Avantor stock?

In the last quarter, AVTR stock was bought by institutional investors including:
  1. BlackRock Inc.
  2. Barrow Hanley Mewhinney & Strauss LLC
  3. Bank of America Corp DE
  4. Freestone Grove Partners LP
  5. Bank of New York Mellon Corp
  6. Western Standard LLC
  7. Corient Private Wealth LP
  8. Corient Private Wealth LP
During the previous year, these company insiders have bought Avantor stock:
  1. Sanjeev K Mehra (Director)
  2. Gregory L Summe (Director)
  3. Gregory T Lucier (Director)
  4. Joseph R Massaro (Director)
  5. Simon Dingemans (Director)
Learn More investors buying Avantor stock.

Avantor Active Insiders

Michael Stubblefield
Michael Stubblefield (Age 53)
President, CEO & Director
Thomas A Szlosek
Thomas A Szlosek (Age 62)
CFO
Steven W Eck
Steven W Eck (Age 49)
CAO
Rajiv Gupta
Rajiv Gupta
Director
Jo Natauri
Director
Christi Shaw
Christi Shaw
Director
Joseph R Massaro
Joseph R Massaro
Director
Gregory L Summe
Gregory L Summe
Director
Sanjeev K Mehra
Sanjeev K Mehra
Director
Gregory T Lucier
Gregory T Lucier
Director
1 recent trades
Simon Dingemans
Simon Dingemans
Director
1 recent trades
Gerard Brophy
Gerard Brophy (Age 60)
EVP
Frederic Vanderhaegen
Frederic Vanderhaegen (Age 58)
EVP
Justin Miller
Justin Miller (Age 59)
EVP
Devashish Ohri
Devashish Ohri
EVP
James Bramwell
James Bramwell
EVP
Christophe Couturier
Christophe Couturier
EVP
Michael Wondrasch
Michael Wondrasch (Age 56)
EVP