Avantor Ownership | Who Owns Avantor?

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Avantor Ownership Summary

Avantor is owned by 43.69% institutional investors, 1.44% insiders, and 54.87% retail investors. Dodge & cox is the largest institutional shareholder, holding 17.65% of AVTR shares. Dodge & Cox Stock I is the top mutual fund, with 11.07% of its assets in Avantor shares.

AVTR Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Avantor	43.69%	1.44%	54.87%
Sector	Healthcare Stocks	35.74%	11.83%	52.43%
Industry	Medical Instruments & Supplies Stocks	38.36%	13.43%	48.21%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Dodge & cox	119.65M	17.65%	$938.04M
Blackrock funding, inc. /de	65.70M	9.69%	$515.12M
Vanguard group	64.90M	9.52%	$743.81M
Blackrock	44.01M	6.49%	$932.96M
Wellington management group llp	24.22M	3.57%	$189.92M
Greenhaven associates	22.59M	3.33%	$177.14M
Barrow hanley mewhinney & strauss	22.36M	3.30%	$175.29M
State street	20.72M	3.06%	$162.45M
Engine capital management, lp	19.78M	2.92%	$155.08M
Dimensional fund advisors lp	16.89M	2.49%	$132.44M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
New mountain capital	14.00M	100.00%	$109.76M
Kinney asset management	1.84M	34.31%	$23.03M
Brickwood asset management llp	4.34M	25.52%	$34.00M
Engine capital management, lp	19.78M	18.72%	$155.08M
Clarkston capital partners	8.63M	5.16%	$67.65M
Belfer management	22.32K	2.93%	$174.97K
Greenhaven associates	22.59M	2.92%	$177.14M
Arvin capital management lp	983.10K	2.71%	$13.23M
Kettle hill capital management	1.13M	2.22%	$8.85M
Olstein capital management	1.21M	2.07%	$9.49M

Top Buyers

Holder	Shares	% Assets	Change
Fuller & thaler asset management	10.63M	0.28%	9.01M
Engine capital management, lp	19.78M	18.72%	7.85M
D. e. shaw	13.11M	0.06%	6.89M
Norges bank	6.40M	0.01%	6.40M
Blackrock funding, inc. /de	65.70M	0.01%	6.11M

Top Sellers

Holder	Shares	% Assets	Change
T. rowe price investment management	14.79M	0.08%	-17.35M
Morgan stanley	6.10M	0.00%	-11.37M
Barrow hanley mewhinney & strauss	22.36M	0.57%	-10.93M
Invesco	8.07M	0.01%	-9.10M
Manufacturers life insurance company, the	1.10M	0.01%	-7.63M

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	6.40M	0.01%	6.40M	$73.32M
Yacktman asset management lp	4.75M	0.50%	4.75M	$37.20M
Vanguard fiduciary trust	4.23M	0.01%	4.23M	$33.15M
Marshall wace, llp	3.44M	0.03%	3.44M	$26.95M
Balyasny asset management	3.19M	0.06%	3.19M	$42.87M

Sold Out

Holder	Change
Tfo-tdc	-1.00
Atticus wealth management	-1.00
Rakuten securities	-1.00
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 %
Mar 31, 2026	275	-37.36%	296,190,503	-57.33%	43	0.42%	151	-14.69%	81	-58.46%
Dec 31, 2025	307	-36.57%	383,603,816	-43.48%	56	0.57%	109	-51.12%	149	-22.80%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Dodge & Cox Stock I	74.87M	11.07%	-
iShares Core S&P Mid-Cap ETF	23.04M	3.37%	-11.60K
Vanguard Total Stock Mkt Idx Inv	21.80M	3.19%	57.47K
Vanguard US Total Market Shares ETF	20.46M	3.00%	-1.03M
Vanguard Health Care Inv	20.48M	3.00%	1.68M
Vanguard Small Cap Index	15.71M	2.30%	-15.89K
UBS: Global Equity	15.16M	2.23%	-
T. Rowe Price Capital Appreciation	12.06M	1.77%	-5.40M
Touchstone Mid Cap Y	10.11M	1.49%	-1.12M
Vanguard Small Cap Value Index Inv	10.10M	1.48%	80.63K

Recent Insider Transactions

Date	Name	Role	Activity	Value
May 08, 2026	LUCIER GREGORY T	-	Buy	$83.20K
May 01, 2026	Dingemans Simon	-	Buy	$203.50K
Mar 10, 2026	MEHRA SANJEEV K	-	Buy	$1.00M
Feb 19, 2026	LUCIER GREGORY T	-	Buy	$458.00K
Feb 12, 2026	SUMME GREGORY L	-	Buy	$940.00K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	2	-
2026 Q1	3	-
2025 Q4	3	-
2025 Q3	1	1
2025 Q2	7	-

AVTR Ownership FAQ

Who Owns Avantor?

Avantor shareholders are primarily institutional investors at 43.69%, followed by 1.44% insiders and 54.87% retail investors. The average institutional ownership in Avantor's industry, Medical Instruments & Supplies Stocks, is 38.36%, which Avantor exceeds.

Who owns the most shares of Avantor?

Avantor’s largest shareholders are Dodge & cox (119.65M shares, 17.65%), Blackrock funding, inc. /de (65.7M shares, 9.69%), and Vanguard group (64.9M shares, 9.52%). Together, they hold 36.86% 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 109.76M$.

Who is the top mutual fund holder of Avantor shares?

Dodge & Cox Stock I is the top mutual fund holder of Avantor shares, with 11.07% of its total shares outstanding invested in 74.87M Avantor shares.

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