Avantor Ownership | Who Owns Avantor?

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Avantor Ownership Summary

Avantor is owned by 98.81% institutional investors, 1.37% insiders. Dodge & cox is the largest institutional shareholder, holding 17.28% of AVTR shares. Dodge & Cox Stock I is the top mutual fund, with 10.99% of its assets in Avantor shares.

AVTR Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Avantor	98.81%	1.37%	-0.18%
Sector	Healthcare Stocks	42.52%	10.82%	46.66%
Industry	Medical Instruments & Supplies Stocks	40.77%	13.85%	45.38%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Dodge & cox	117.75M	17.28%	$1.47B
Vanguard group	65.99M	9.68%	$823.54M
Blackrock funding, inc. /de	60.72M	8.91%	$757.75M
Blackrock	44.01M	6.49%	$932.96M
Barrow hanley mewhinney & strauss	34.55M	5.07%	$431.16M
T. rowe price investment management	32.93M	4.83%	$410.94M
State street	20.37M	2.99%	$254.16M
Engine capital management, lp	19.72M	2.89%	$246.11M
Greenhaven associates	18.31M	2.69%	$228.53M
Janus henderson group	18.14M	2.67%	$382.13M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
New mountain capital	14.00M	100.00%	$174.72M
Kinney asset management	1.84M	34.31%	$23.03M
Engine capital management, lp	19.72M	29.22%	$246.11M
Bancreek capital management, lp	306.25K	8.02%	$3.82M
Pacific capital partners	505.16K	7.02%	$6.30M
Belfer management	25.46K	4.41%	$317.76K
Clarkston capital partners	15.02M	4.04%	$187.45M
Greenhaven associates	18.31M	3.48%	$228.53M
Southeastern asset management inc/tn/	5.15M	3.28%	$64.26M
Broyhill asset management	283.88K	3.10%	$3.54M

Top Buyers

Holder	Shares	% Assets	Change
Greenhaven associates	18.31M	3.48%	18.31M
Engine capital management, lp	19.72M	29.22%	14.22M
London co of virginia	12.79M	0.88%	12.79M
Norges bank	6.76M	0.02%	6.76M
Millennium management	5.31M	0.05%	5.31M

Top Sellers

Holder	Shares	% Assets	Change
T. rowe price investment management	32.93M	0.25%	-23.57M
Blackrock funding, inc. /de	60.72M	0.01%	-11.19M
Bessemer group	93.78K	0.00%	-7.00M
Ccla investment management	-	-	-5.85M
Van lanschot kempen investment management	-	-	-5.51M

New Positions

Holder	Shares	% Assets	Change	Value
Greenhaven associates	18.31M	3.48%	18.31M	$228.53M
London co of virginia	12.79M	0.88%	12.79M	$159.67M
Norges bank	6.76M	0.02%	6.76M	$142.51M
Southeastern asset management inc/tn/	5.15M	3.28%	5.15M	$64.26M
Balyasny asset management	3.19M	0.06%	3.19M	$42.87M

Sold Out

Holder	Change
Atticus wealth management	-1.00
Tfo-tdc	-1.00
Sjs investment consulting	-2.00
Tfc financial management	-3.00
Cape investment advisory	-5.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Sep 30, 2025	460	-12.71%	673,359,407	-5.32%	98	0.91%	212	-30.72%	184	26.90%
Jun 30, 2025	516	2.79%	711,723,160	4.21%	104	1.04%	300	14.94%	143	-15.38%
Mar 31, 2025	14	-97.24%	21,523,236	-96.85%	3	0.03%	6	-97.40%	4	-98.08%
Dec 31, 2024	496	-8.66%	682,494,306	0.86%	100	1.01%	222	-22.65%	203	20.83%
Sep 30, 2024	536	1.52%	674,607,189	3.80%	99	1.08%	283	6.39%	165	-2.37%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Dodge & Cox Stock I	74.87M	10.99%	8.03M
iShares Core S&P Mid-Cap ETF	22.18M	3.25%	-
Vanguard US Total Market Shares ETF	20.46M	3.00%	-1.03M
Vanguard Total Stock Mkt Idx Inv	20.36M	2.99%	-486.06K
T. Rowe Price US Mid-Cap Growth Equity	19.48M	2.86%	-485.10K
T. Rowe Price Mid-Cap Growth	19.45M	2.85%	-35.60K
Vanguard Small Cap Index	15.71M	2.30%	-105.20K
UBS: Global Equity	15.16M	2.23%	-
T. Rowe Price Capital Appreciation	12.06M	1.77%	-5.40M
Vanguard Small Cap Value Index Inv	10.08M	1.48%	-8.89K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Nov 17, 2025	Ligner Emmanuel	President and CEO	Buy	$993.13K
Oct 30, 2025	SUMME GREGORY L	-	Buy	$1.13M
Aug 21, 2025	SUMME GREGORY L	-	Buy	$1.26M
Aug 05, 2025	Eck Steven W	SVP & Chief Accounting Officer	Sell	$39.59K
May 23, 2025	SUMME GREGORY L	-	Buy	$375.00K

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	2	-
2025 Q3	1	1
2025 Q2	7	-
2025 Q1	-	4
2024 Q4	-	-

AVTR Ownership FAQ

Who Owns Avantor?

Avantor shareholders are primarily institutional investors at 98.81%, followed by 1.37% insiders and -0.18% retail investors. The average institutional ownership in Avantor's industry, Medical Instruments & Supplies Stocks, is 40.77%, which Avantor exceeds.

Who owns the most shares of Avantor?

Avantor’s largest shareholders are Dodge & cox (117.75M shares, 17.28%), Vanguard group (65.99M shares, 9.68%), and Blackrock funding, inc. /de (60.72M shares, 8.91%). Together, they hold 35.87% of Avantor’s total shares outstanding.

Does Blackrock own Avantor?

Yes, BlackRock owns 6.49% of Avantor, totaling 44.01M shares as of Jun 2024. This represents 0.02% of BlackRock's total assets, with a market value of 932.96M$. In the last quarter, BlackRock increased its holdings by 1.25M shares, a 2.91% change.

Who is Avantor’s biggest shareholder by percentage of total assets invested?

New mountain capital is Avantor’s biggest shareholder by percentage of total assets invested, with 100.00% of its assets in 14M Avantor shares, valued at 174.72M$.

Who is the top mutual fund holder of Avantor shares?

Dodge & Cox Stock I is the top mutual fund holder of Avantor shares, with 10.99% of its total shares outstanding invested in 74.87M Avantor shares.

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