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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): $39,591.64

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: $9.58
Price Change: ▲ Price Increase of +0.115 (1.22%)
As of 06/18/2026 01:09 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  
9/7/2023Steven W. EckCAOSell7,577$20.64$156,389.2828,187View SEC Filing Icon  
8/25/2023Frederic VanderhaegenEVPSell25,000$21.47$536,750.00160,735View 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
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 Company 1,101,504$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
5/8/2026PNC Financial Services Group Inc.47,157$0.37M0.0%+83.7%0.007%Search for SEC Filing on Google Icon
5/7/2026Dimensional Fund Advisors LP16,894,649$132.44M0.0%+15.7%2.474%Search for SEC Filing on Google Icon
5/7/2026Balefire LLC19,987$0.16M0.0%-85.8%0.003%Search for SEC Filing on Google Icon
5/7/2026Parallel Advisors LLC8,452$66K0.0%+21.4%0.001%Search for SEC Filing on Google Icon
5/7/2026Swiss National Bank1,349,400$10.58M0.0%+0.4%0.198%Search for SEC Filing on Google Icon
5/6/2026California Public Employees Retirement System1,155,532$9.06M0.0%+24.9%0.169%Search for SEC Filing on Google Icon
5/6/2026Kera Capital Partners Inc.18,573$0.15M0.0%-25.7%0.003%Search for SEC Filing on Google Icon
5/6/2026Lightrock Netherlands B.V.328,626$2.58M0.3%+22.9%0.048%Search for SEC Filing on Google Icon
5/6/2026Bessemer Group Inc.12,088$95K0.0%-12.7%0.002%Search for SEC Filing on Google Icon
5/6/2026Gerald Baker Financial Group LLC94,206$0.74M0.2%N/A0.014%Search for SEC Filing on Google Icon
5/6/2026Allspring Global Investments Holdings LLC12,290$95K0.0%N/A0.002%Search for SEC Filing on Google Icon
5/5/2026Sanctuary Advisors LLC21,412$0.17M0.0%-61.9%0.003%Search for SEC Filing on Google Icon
5/4/2026Calamos Wealth Management LLC38,401$0.30M0.0%N/A0.006%Search for SEC Filing on Google Icon
5/4/2026Calamos Advisors LLC38,401$0.30M0.0%N/A0.006%Search for SEC Filing on Google Icon
5/4/2026State of Michigan Retirement System164,100$1.29M0.0%+1.9%0.024%Search for SEC Filing on Google Icon
5/4/2026Principal Financial Group Inc.1,522,563$11.94M0.0%+3.8%0.223%Search for SEC Filing on Google Icon
5/4/2026Chicago Partners Investment Group LLC24,069$0.20M0.0%N/A0.004%Search for SEC Filing on Google Icon
5/2/2026ARQ Wealth Advisors LLC14,225$0.11M0.0%N/A0.002%Search for SEC Filing on Google Icon
5/2/2026Diversify Wealth Management LLC26,810$0.21M0.0%+35.1%0.004%Search for SEC Filing on Google Icon
5/1/2026Fifth Third Bancorp424,817$3.33M0.0%+597.7%0.062%Search for SEC Filing on Google Icon
5/1/2026Sequoia Financial Advisors LLC11,361$89K0.0%-10.1%0.002%Search for SEC Filing on Google Icon
4/30/2026Hsbc Holdings PLC31,037$0.24M0.0%-85.8%0.005%Search for SEC Filing on Google Icon
4/30/2026Oregon Public Employees Retirement Fund139,857$1.10M0.0%+3.2%0.021%Search for SEC Filing on Google Icon
4/30/2026Quantum Portfolio Management LLC10,219$80K0.0%N/A0.001%Search for SEC Filing on Google Icon
4/27/2026New York State Teachers Retirement System330,712$2.59M0.0%-13.7%0.048%Search for SEC Filing on Google Icon
4/27/2026Leonteq Securities AG21,242$0.17M0.0%+255.6%0.003%Search for SEC Filing on Google Icon
4/23/2026SJS Investment Consulting Inc.5,235$41K0.0%+1,599.7%0.001%Search for SEC Filing on Google Icon
4/22/2026Pictet Asset Management Holding SA106,835$0.84M0.0%+2.2%0.016%Search for SEC Filing on Google Icon
4/22/2026Sterling Capital Management LLC22,165$0.17M0.0%-43.3%0.003%Search for SEC Filing on Google Icon
4/21/2026Louisiana State Employees Retirement System197,800$1.55M0.0%N/A0.029%Search for SEC Filing on Google Icon
4/20/2026Blue Trust Inc.26,923$0.21M0.0%+61.5%0.004%Search for SEC Filing on Google Icon
4/20/2026Assenagon Asset Management S.A.106,070$0.83M0.0%-97.1%0.016%Search for SEC Filing on Google Icon
4/16/2026SG Americas Securities LLC373,892$2.93M0.0%-7.0%0.055%Search for SEC Filing on Google Icon
3/20/2026Hsbc Holdings PLC218,287$2.51M0.0%+635.0%0.032%Search for SEC Filing on Google Icon
3/17/2026Rockefeller Capital Management L.P.4,506$52K0.0%-84.8%0.001%Search for SEC Filing on Google Icon
3/9/2026Corient Private Wealth LLC624,623$7.16M0.0%-82.2%0.092%Search for SEC Filing on Google Icon
3/6/2026Hsbc Holdings PLC218,287$2.51M0.0%+635.0%0.032%Search for SEC Filing on Google Icon
3/3/2026Caitong International Asset Management Co. Ltd6,051$69K0.0%-58.8%0.001%Search for SEC Filing on Google Icon
2/26/2026Alpine Global Management LLC18,448$0.21M0.0%N/A0.003%Search for SEC Filing on Google Icon
2/24/2026Pacer Advisors Inc.109,417$1.25M0.0%+22.0%0.016%Search for SEC Filing on Google Icon
2/23/2026Kera Capital Partners Inc.24,992$0.27M0.0%+8.6%0.004%Search for SEC Filing on Google Icon
2/19/2026T. Rowe Price Investment Management Inc.32,131,843$368.23M0.2%-2.4%4.711%Search for SEC Filing on Google Icon
2/19/2026Invesco Ltd.17,178,716$196.87M0.0%+7.0%2.519%Search for SEC Filing on Google Icon
2/19/2026Corient Private Wealth LLC627,587$7.16M0.0%-82.1%0.092%Search for SEC Filing on Google Icon
2/19/2026Alberta Investment Management Corp1,111,144$12.73M0.1%N/A0.163%Search for SEC Filing on Google Icon
2/18/2026Mercer Global Advisors Inc. ADV93,125$1.07M0.0%+15.6%0.014%Search for SEC Filing on Google Icon
2/18/2026State of Tennessee Department of Treasury310,711$3.39M0.0%-9.3%0.046%Search for SEC Filing on Google Icon
2/18/2026Mackenzie Financial Corp412,455$4.72M0.0%+1,180.2%0.060%Search for SEC Filing on Google Icon
2/18/2026Fuller & Thaler Asset Management Inc.1,622,397$18.59M0.1%N/A0.238%Search for SEC Filing on Google Icon
2/18/2026XTX Topco Ltd36,792$0.42M0.0%-74.4%0.005%Search for SEC Filing on Google Icon
2/18/2026Wellington Management Group LLP23,436,636$268.58M0.1%N/A3.436%Search for SEC Filing on Google Icon
2/18/2026Quadrature Capital Ltd76,024$0.87M0.0%N/A0.011%Search for SEC Filing on Google Icon
2/18/2026Readystate Asset Management LP813,081$9.32M0.4%+995.9%0.119%Search for SEC Filing on Google Icon
2/18/2026Millennium Management LLC3,668,997$42.05M0.0%+35.8%0.538%Search for SEC Filing on Google Icon
2/18/2026Moore Capital Management LP499,086$5.72M0.1%+70.0%0.073%Search for SEC Filing on Google Icon
2/18/2026Janus Henderson Group PLC307,978$3.53M0.0%+7.2%0.045%Search for SEC Filing on Google Icon
2/18/2026Gotham Asset Management LLC362,356$4.15M0.0%-65.4%0.053%Search for SEC Filing on Google Icon
2/18/2026Engine Capital Management LP11,927,812$136.69M18.9%-39.5%1.749%Search for SEC Filing on Google Icon
2/18/2026Eversept Partners LP3,176,644$36.40M1.8%+243.6%0.466%Search for SEC Filing on Google Icon
2/18/2026Capitolis Liquid Global Markets LLC505,000$5.79M0.0%N/A0.074%Search for SEC Filing on Google Icon
2/18/2026Circumference Group LLC305,000$3.50M3.8%N/A0.045%Search for SEC Filing on Google Icon
2/18/2026Clearline Capital LP502,683$5.76M0.3%N/A0.074%Search for SEC Filing on Google Icon
2/18/2026Boothbay Fund Management LLC26,670$0.31M0.0%N/A0.004%Search for SEC Filing on Google Icon
2/18/2026Aristeia Capital L.L.C.40,810$0.47M0.0%N/A0.006%Search for SEC Filing on Google Icon
2/18/2026American Trust10,934$0.13M0.0%N/A0.002%Search for SEC Filing on Google Icon
2/17/2026Freestone Grove Partners LP2,584,006$29.61M0.2%N/A0.379%Search for SEC Filing on Google Icon
2/17/2026Guggenheim Capital LLC15,241$0.18M0.0%-28.6%0.002%Search for SEC Filing on Google Icon
2/17/2026ADAR1 Capital Management LLC70,000$0.80M0.1%+180.0%0.010%Search for SEC Filing on Google Icon
2/17/2026AQR Capital Management LLC4,391,597$50.33M0.0%+263.2%0.644%Search for SEC Filing on Google Icon
2/17/2026Cetera Investment Advisers28,770$0.33M0.0%-10.2%0.004%Search for SEC Filing on Google Icon
2/17/2026EFG International AG87,500$1M0.0%N/A0.013%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: $9.58
Low: $9.35
High: $9.67

50 Day Range

MA: $8.48
Low: $7.62
High: $9.94

52 Week Range

Now: $9.58
Low: $7.26
High: $15.93

Volume

2,380,879 shs

Average Volume

10,653,273 shs

Market Capitalization

$6.54 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

0.97

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. Engine Capital Management LP — 2.90%
  2. Dimensional Fund Advisors LP — 2.47%
  3. London Co. of Virginia — 1.59%
  4. Clarkston Capital Partners LLC — 1.26%
  5. Bank of America Corp DE — 1.04%
  6. Sei Investments Co. — 0.77%
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. The Manufacturers Life Insurance Company
  2. Clarkston Capital Partners LLC
  3. Assenagon Asset Management S.A.
  4. First Trust Advisors LP
  5. London Co. of Virginia
  6. Weiss Asset Management LP
  7. Eversept Partners LP
  8. Hsbc Holdings PLC

Which major investors are buying Avantor stock?

In the last quarter, AVTR stock was bought by institutional investors including:
  1. Engine Capital Management LP
  2. Dimensional Fund Advisors LP
  3. Bank of America Corp DE
  4. Quantinno Capital Management LP
  5. Amundi
  6. Fifth Third Bancorp
  7. California Public Employees Retirement System
  8. Louisiana State Employees Retirement System
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
1 recent trades
Sanjeev K Mehra
Sanjeev K Mehra
Director
1 recent trades
Gregory T Lucier
Gregory T Lucier
Director
2 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