AVANTOR INC (AVTR) 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 June 30, 2026. The institutional investors covered on this page collectively reported approximately $6.91B 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 $1.19B in its June 30, 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 $1.86B, representing an estimated gain of +56.77% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 53% 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
446
Total Reported Value
$6.91B
Largest Holder
Dodge & Cox Stock Fund
Largest Position
$1.19B
Insider Transactions (90d)
5
Latest Filing Quarter
Q2 2026
New Institutional Positions
72
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 | 0.62% | 120,020,974 | $1,188,207,643 | $1,862,725,516 | +$674,517,873 | +56.77% |
| Blackrock, Inc. | 0.01% | 70,281,231 | $695,784,194 | $1,090,764,705 | +$394,980,511 | +56.77% | |
| Vanguard Portfolio Management Llc | 0.01% | 31,343,250 | $310,298,175 | $486,447,240 | +$176,149,065 | +56.77% | |
| Vanguard Capital Management Llc | 0.01% | 30,802,835 | $304,948,067 | $478,059,999 | +$173,111,932 | +56.77% | |
| Greenhaven Associates | Edgar Wachenheim III | 2.82% | 24,637,310 | $243,909,369 | $382,371,051 | +$138,461,682 | +56.77% |
| State Street Corp | 0.01% | 21,572,974 | $213,572,443 | $334,812,556 | +$121,240,113 | +56.77% | |
| Dimensional Fund Advisors Lp | 0.04% | 20,412,181 | $202,086,268 | $316,797,049 | +$114,710,781 | +56.76% | |
| Engine Capital Management, Lp | 19.13% | 19,860,830 | $196,622,217 | $308,240,082 | +$111,617,865 | +56.77% | |
| Barrow Hanley Mewhinney & Strauss Llc | 0.59% | 19,735,968 | $195,386,083 | $306,302,223 | +$110,916,140 | +56.77% | |
| New Mountain Capital, L.L.C. | 100.00% | 14,000,000 | $138,600,000 | $217,280,000 | +$78,680,000 | +56.77% | |
| Invesco Ltd. | 0.01% | 13,885,360 | $137,465,065 | $215,500,787 | +$78,035,722 | +56.77% | |
| Geode Capital Management, Llc | 0.01% | 13,180,567 | $130,519,321 | $204,562,400 | +$74,043,079 | +56.73% | |
| Marshall Wace, Llp | 0.11% | 13,130,158 | $129,988,565 | $203,780,052 | +$73,791,487 | +56.77% | |
| Aqr Capital Management Llc | 0.04% | 11,627,566 | $115,112,902 | $180,459,824 | +$65,346,922 | +56.77% | |
| Bank Of America Corp | 0.01% | 10,989,344 | $108,794,506 | $170,554,619 | +$61,760,113 | +56.77% | |
| Earnest Partners Llc | 0.38% | 10,748,525 | $106,410,397 | $166,817,108 | +$60,406,711 | +56.77% | |
| London Co Of Virginia | 0.59% | 10,485,960 | $103,811,008 | $162,742,099 | +$58,931,091 | +56.77% | |
| Fuller & Thaler Asset Management, Inc. | 0.28% | 10,256,345 | $101,537,816 | $159,178,474 | +$57,640,658 | +56.77% | |
| D. E. Shaw & Co., Inc. | 0.06% | 9,571,523 | $94,758,077 | $148,550,037 | +$53,791,960 | +56.77% | |
| First Pacific Advisors, Lp | 1.00% | 8,190,740 | $81,088,326 | $127,120,285 | +$46,031,959 | +56.77% | |
| Sei Investments Co | 0.07% | 7,947,198 | $78,677,367 | $123,340,513 | +$44,663,146 | +56.77% | |
| Fmr Llc | 0.00% | 7,845,462 | $77,670,074 | $121,761,570 | +$44,091,496 | +56.77% | |
| Gendell Jeffrey L | 0.68% | 7,607,270 | $75,311,973 | $118,064,830 | +$42,752,857 | +56.77% | |
| Vaughan Nelson Investment Management, L.P. | 0.65% | 7,392,825 | $73,188,967 | $114,736,644 | +$41,547,677 | +56.77% | |
| Clarkston Capital Partners, Llc | 5.68% | 6,789,314 | $67,214,209 | $105,370,153 | +$38,155,944 | +56.77% | |
| Morgan Stanley | 0.00% | 6,758,161 | $66,905,804 | $104,886,659 | +$37,980,855 | +56.77% | |
| Goldman Sachs Group Inc | 0.01% | 6,204,341 | $61,422,976 | $96,291,372 | +$34,868,396 | +56.77% | |
| Norges Bank | 0.01% | 6,091,712 | $60,307,949 | $94,543,370 | +$34,235,421 | +56.77% | |
| Charles Schwab Investment Management Inc | 0.01% | 5,821,005 | $57,627,950 | $90,341,998 | +$32,714,048 | +56.77% | |
| Northern Trust Corp | 0.01% | 5,732,678 | $56,753,512 | $88,971,163 | +$32,217,651 | +56.77% | |
| Freestone Grove Partners Lp | 0.37% | 5,714,884 | $56,577,352 | $88,695,000 | +$32,117,648 | +56.77% | |
| Ubs Group Ag | 0.01% | 5,672,297 | $56,155,742 | $88,034,049 | +$31,878,307 | +56.77% | |
| Ameriprise Financial Inc | 0.01% | 5,524,942 | $54,696,928 | $85,747,100 | +$31,050,172 | +56.77% | |
| Natixis Advisors, Llc | 0.06% | 4,946,488 | $48,970,000 | $76,769,494 | +$27,799,494 | +56.77% | |
| Yacktman Asset Management | Donald Yacktman | 0.58% | 4,770,000 | $47,223,000 | $74,030,400 | +$26,807,400 | +56.77% |
| Longleaf Partners | Mason Hawkins | 2.44% | 4,725,478 | $46,782,232 | $73,339,419 | +$26,557,187 | +56.77% |
| Brickwood Asset Management Llp | 32.70% | 4,597,519 | $45,515,438 | $71,353,495 | +$25,838,057 | +56.77% | |
| Vanguard Fiduciary Trust Co | 0.01% | 4,322,245 | $42,790,226 | $67,081,242 | +$24,291,016 | +56.77% | |
| Jones Financial Companies Lllp | 0.02% | 4,120,981 | $42,363,659 | $63,957,625 | +$21,593,966 | +50.97% | |
| Bank Of New York Mellon Corp | 0.01% | 4,121,222 | $40,800,098 | $63,961,365 | +$23,161,267 | +56.77% | |
| Royce & Associates Lp | 0.29% | 3,676,084 | $36,393,232 | $57,052,824 | +$20,659,592 | +56.77% | |
| Frontier Capital Management Co Llc | 0.32% | 3,506,970 | $34,719,001 | $54,428,174 | +$19,709,173 | +56.77% | |
| Private Management Group Inc | 0.81% | 3,097,234 | $30,662,617 | $48,069,072 | +$17,406,455 | +56.77% | |
| Voss Capital, Lp | 1.31% | 2,650,000 | $26,235,000 | $41,128,000 | +$14,893,000 | +56.77% | |
| Prescott General Partners Llc | 1.32% | 2,600,000 | $25,740,000 | $40,352,000 | +$14,612,000 | +56.77% | |
| Gotham Asset Management, Llc | 0.06% | 2,516,444 | $24,912,796 | $39,055,211 | +$14,142,415 | +56.77% | |
| Quantinno Capital Management Lp | 0.03% | 2,442,138 | $24,177,175 | $37,901,982 | +$13,724,807 | +56.77% | |
| Loews Corp | 0.17% | 2,200,000 | $21,780,000 | $34,144,000 | +$12,364,000 | +56.77% | |
| Western Standard Llc | 7.07% | 2,109,984 | $20,888,842 | $32,746,952 | +$11,858,110 | +56.77% | |
| Kettle Hill Capital Management, Llc | 4.53% | 1,860,954 | $18,423,445 | $28,882,006 | +$10,458,561 | +56.77% |
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.