AVANTOR INC (AVTR) Top Institutional Shareholders
AVANTOR INC (AVTR) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $5.23B in AVTR holdings during the latest filing period.
Dodge & Cox Stock Fund is currently the largest disclosed institutional shareholder of AVTR tracked by InsiderSet, reporting ownership valued at approximately $938.04M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $1.13B, representing an estimated gain of +20.66% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 56% of the total disclosed AVTR value among the investors covered in this analysis. Major shareholders include Dodge & Cox Stock Fund, Blackrock, Inc., Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in AVANTOR INC (AVTR).
This page ranks the largest institutional AVTR shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
425
Total Reported Value
$5.23B
Largest Holder
Dodge & Cox Stock Fund
Largest Position
$938.04M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
77
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Dodge & Cox Stock Fund | V. D. Dodge, E. M. Cox | 0.52% | 119,648,329 | $938,042,899 | $1,131,873,192 | +$193,830,293 | +20.66% |
| Blackrock, Inc. | 0.01% | 65,703,554 | $515,115,868 | $621,555,621 | +$106,439,753 | +20.66% | |
| Vanguard Portfolio Management Llc | 0.01% | 31,275,847 | $245,202,640 | $295,869,513 | +$50,666,873 | +20.66% | |
| Vanguard Capital Management Llc | 0.01% | 30,606,112 | $239,951,918 | $289,533,820 | +$49,581,902 | +20.66% | |
| Wellington Management Group Llp | 0.04% | 24,224,156 | $189,917,384 | $229,160,516 | +$39,243,132 | +20.66% | |
| Greenhaven Associates | Edgar Wachenheim III | 2.92% | 22,593,838 | $177,135,690 | $213,737,707 | +$36,602,017 | +20.66% |
| Barrow Hanley Mewhinney & Strauss Llc | 0.57% | 22,358,399 | $175,289,848 | $211,510,455 | +$36,220,607 | +20.66% | |
| State Street Corp | 0.01% | 20,721,079 | $162,453,259 | $196,021,407 | +$33,568,148 | +20.66% | |
| Engine Capital Management, Lp | 18.72% | 19,780,830 | $155,081,707 | $187,126,652 | +$32,044,945 | +20.66% | |
| Dimensional Fund Advisors Lp | 0.03% | 16,894,649 | $132,443,131 | $159,823,380 | +$27,380,249 | +20.67% | |
| Storebrand Asset Management As | 0.04% | 3,979,854 | $123,866,888 | $37,649,419 | -$86,217,469 | -69.60% | |
| New Mountain Capital, L.L.C. | 100.00% | 14,000,000 | $109,760,000 | $132,440,000 | +$22,680,000 | +20.66% | |
| D. E. Shaw & Co., Inc. | 0.08% | 13,110,674 | $102,787,684 | $124,026,976 | +$21,239,292 | +20.66% | |
| Geode Capital Management, Llc | 0.01% | 12,891,421 | $101,093,207 | $121,952,843 | +$20,859,636 | +20.63% | |
| London Co Of Virginia | 0.52% | 10,852,257 | $85,081,702 | $102,662,351 | +$17,580,649 | +20.66% | |
| Fuller & Thaler Asset Management, Inc. | 0.28% | 10,632,112 | $83,355,761 | $100,579,780 | +$17,224,019 | +20.66% | |
| Clarkston Capital Partners, Llc | 5.16% | 8,629,389 | $67,654,410 | $81,634,020 | +$13,979,610 | +20.66% | |
| First Pacific Advisors, Lp | 0.89% | 8,089,023 | $63,417,940 | $76,522,158 | +$13,104,218 | +20.66% | |
| Invesco Ltd. | 0.01% | 8,073,854 | $63,299,016 | $76,378,659 | +$13,079,643 | +20.66% | |
| Fmr Llc | 0.00% | 7,610,318 | $59,664,887 | $71,993,608 | +$12,328,721 | +20.66% | |
| Bank Of America Corp | 0.00% | 7,067,563 | $55,409,694 | $66,859,146 | +$11,449,452 | +20.66% | |
| Morgan Stanley | 0.00% | 6,098,287 | $47,810,584 | $57,689,795 | +$9,879,211 | +20.66% | |
| Earnest Partners Llc | 0.19% | 6,024,712 | $47,233,742 | $56,993,776 | +$9,760,034 | +20.66% | |
| Northern Trust Corp | 0.01% | 5,458,656 | $42,795,863 | $51,638,886 | +$8,843,023 | +20.66% | |
| Charles Schwab Investment Management Inc | 0.01% | 5,410,744 | $42,420,233 | $51,185,638 | +$8,765,405 | +20.66% | |
| Sei Investments Co | 0.04% | 5,287,850 | $41,456,753 | $50,023,061 | +$8,566,308 | +20.66% | |
| Jane Street Group, Llc | 0.04% | 4,966,462 | $38,937,062 | $46,982,731 | +$8,045,669 | +20.66% | |
| Gendell Jeffrey L | 0.53% | 4,917,270 | $38,551,396 | $46,517,374 | +$7,965,978 | +20.66% | |
| Aqr Capital Management Llc | 0.02% | 4,867,208 | $37,720,863 | $46,043,788 | +$8,322,925 | +22.06% | |
| Yacktman Asset Management | Donald Yacktman | 0.50% | 4,745,000 | $37,200,800 | $44,887,700 | +$7,686,900 | +20.66% |
| Voss Capital, Lp | 1.99% | 4,447,083 | $34,865,131 | $42,069,405 | +$7,204,274 | +20.66% | |
| Bank Of New York Mellon Corp | 0.01% | 4,418,987 | $34,644,859 | $41,803,617 | +$7,158,758 | +20.66% | |
| Brickwood Asset Management Llp | 25.52% | 4,337,012 | $34,002,174 | $41,028,134 | +$7,025,960 | +20.66% | |
| Vanguard Fiduciary Trust Co | 0.01% | 4,227,746 | $33,145,529 | $39,994,477 | +$6,848,948 | +20.66% | |
| Robeco Schweiz Ag | 0.69% | 4,189,536 | $32,845,962 | $39,633,011 | +$6,787,049 | +20.66% | |
| Ameriprise Financial Inc | 0.01% | 4,115,694 | $32,267,039 | $38,934,465 | +$6,667,426 | +20.66% | |
| Voya Investment Management Llc | 0.03% | 3,738,322 | $29,308,445 | $35,364,526 | +$6,056,081 | +20.66% | |
| Goldman Sachs Group Inc | 0.00% | 3,714,275 | $29,119,916 | $35,137,042 | +$6,017,126 | +20.66% | |
| Ubs Group Ag | 0.01% | 3,660,024 | $28,694,588 | $34,623,827 | +$5,929,239 | +20.66% | |
| Longleaf Partners | Mason Hawkins | 1.36% | 3,520,212 | $27,598,462 | $33,301,206 | +$5,702,744 | +20.66% |
| Marshall Wace, Llp | 0.03% | 3,437,833 | $26,952,610 | $32,521,900 | +$5,569,290 | +20.66% | |
| Eversept Partners, Lp | 1.54% | 2,974,287 | $23,318,410 | $28,136,755 | +$4,818,345 | +20.66% | |
| Freestone Grove Partners Lp | 0.16% | 2,791,157 | $21,882,671 | $26,404,345 | +$4,521,674 | +20.66% | |
| Private Management Group Inc | 0.62% | 2,732,995 | $21,426,681 | $25,854,133 | +$4,427,452 | +20.66% | |
| Prescott General Partners Llc | 1.49% | 2,600,000 | $20,384,000 | $24,596,000 | +$4,212,000 | +20.66% | |
| Millennium Management Llc | 0.01% | 2,435,280 | $19,092,595 | $23,037,749 | +$3,945,154 | +20.66% | |
| Tudor Investment Corp Et Al | 0.10% | 2,344,437 | $18,380,386 | $22,178,374 | +$3,797,988 | +20.66% | |
| Jones Financial Companies Lllp | 0.01% | 2,330,767 | $17,270,983 | $22,049,056 | +$4,778,073 | +27.67% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 2,146,729 | $16,830,355 | $20,308,056 | +$3,477,701 | +20.66% | |
| Frontier Capital Management Co Llc | 0.16% | 2,024,010 | $15,868,241 | $19,147,135 | +$3,278,894 | +20.66% |
Frequently asked questions about AVTR
Who owns the most AVTR stock?
The largest holders of AVTR are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for AVANTOR INC (AVTR).
Is AVTR widely held by superinvestors?
Many widely followed stocks like AVTR appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly AVTR is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.