Who owns Avantor (AVTR)
Which tracked institutional funds hold AVTR, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See AVTR company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
159 tracked funds added or opened AVTR while 67 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
AVTR’s largest tracked holder by dollar value, DODGE & COX, sizes it at 0.6% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.6pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in AVTR divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 427 tracked filers holding AVTR, 269 increased or opened the position and 204 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in AVTR between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 17
- VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P.$73M
- Western Standard LLC$21M
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$8M
- CastleKnight Management LP$7M
- EASTERLY INVESTMENT PARTNERS LLC$7M
- Melqart Asset Management (UK) Ltd$6M
Full exits 42
- WELLINGTON MANAGEMENT GROUP LLP$188M
- T. Rowe Price Investment Management, Inc.$116M
- JANE STREET GROUP, LLC$39M
- Eversept Partners, LP$23M
- NATIXIS ADVISORS, LLC$20M
- TUDOR INVESTMENT CORP ET AL$18M
Largest adds
- BlackRock, Inc.$266M
- DODGE & COX$250M
- MARSHALL WACE, LLP$103M
- Invesco Ltd.$86M
- AQR CAPITAL MANAGEMENT LLC$77M
- DIMENSIONAL FUND ADVISORS LP$70M
Largest trims
- NORGES BANK$64M
- Robeco Schweiz AG$18M
- VOYA INVESTMENT MANAGEMENT LLC$15M
- MILLENNIUM MANAGEMENT LLC$12M
- Voss Capital, LP$9M
- D. E. Shaw & Co., Inc.$8M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| DODGE & COX added | 120,020,974 | $1.2B | 17.9% | 2026-Q2 |
| BlackRock, Inc. added | 70,281,231 | $696M | 10.5% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 31,343,250 | $310M | 4.7% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 30,802,835 | $305M | 4.6% | 2026-Q2 |
| GREENHAVEN ASSOCIATES INC added | 24,637,310 | $244M | 3.7% | 2026-Q2 |
| STATE STREET CORP added | 21,572,974 | $214M | 3.2% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 20,412,181 | $202M | 3.0% | 2026-Q2 |
| Engine Capital Management, LP added | 19,860,830 | $197M | 3.0% | 2026-Q2 |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC trimmed | 19,735,968 | $195M | 2.9% | 2026-Q2 |
| New Mountain Capital, L.L.C. | 14,000,000 | $139M | 2.1% | 2026-Q2 |
| Invesco Ltd. added | 13,885,360 | $137M | 2.1% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 13,180,567 | $131M | 2.0% | 2026-Q2 |
| MARSHALL WACE, LLP added | 13,130,158 | $130M | 2.0% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 11,627,566 | $115M | 1.7% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 10,989,344 | $109M | 1.6% | 2026-Q2 |
| EARNEST PARTNERS LLC added | 10,748,525 | $106M | 1.6% | 2026-Q2 |
| LONDON CO OF VIRGINIA trimmed | 10,485,960 | $104M | 1.6% | 2026-Q2 |
| FULLER & THALER ASSET MANAGEMENT, INC. trimmed | 10,256,345 | $102M | 1.5% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 9,571,523 | $95M | 1.4% | 2026-Q2 |
| First Pacific Advisors, LP added | 8,190,740 | $81M | 1.2% | 2026-Q2 |
| SEI INVESTMENTS CO added | 7,947,198 | $79M | 1.2% | 2026-Q2 |
| FMR LLC added | 7,845,462 | $78M | 1.2% | 2026-Q2 |
| GENDELL JEFFREY L added | 7,607,270 | $75M | 1.1% | 2026-Q2 |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. added | 7,392,825 | $73M | 1.1% | 2026-Q2 |
| Clarkston Capital Partners, LLC trimmed | 6,789,314 | $67M | 1.0% | 2026-Q2 |
| MORGAN STANLEY added | 6,758,161 | $67M | 1.0% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 6,204,341 | $61M | 0.9% | 2026-Q2 |
| NORGES BANK trimmed | 6,091,712 | $60M | 0.9% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 5,821,005 | $58M | 0.9% | 2026-Q2 |
| NORTHERN TRUST CORP added | 5,732,678 | $57M | 0.9% | 2026-Q2 |
| Freestone Grove Partners LP added | 5,714,884 | $57M | 0.9% | 2026-Q2 |
| UBS Group AG added | 5,672,297 | $56M | 0.8% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 5,524,942 | $55M | 0.8% | 2026-Q2 |
| YACKTMAN ASSET MANAGEMENT LP added | 4,770,000 | $47M | 0.7% | 2026-Q2 |
| SOUTHEASTERN ASSET MANAGEMENT INC/TN/ added | 4,725,478 | $47M | 0.7% | 2026-Q2 |
| Brickwood Asset Management LLP added | 4,597,519 | $46M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 4,322,245 | $43M | 0.6% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 4,121,222 | $41M | 0.6% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP added | 4,120,981 | $42M | 0.6% | 2026-Q2 |
| ROYCE & ASSOCIATES LP added | 3,676,084 | $36M | 0.5% | 2026-Q2 |
| FRONTIER CAPITAL MANAGEMENT CO LLC added | 3,506,970 | $35M | 0.5% | 2026-Q2 |
| PRIVATE MANAGEMENT GROUP INC added | 3,097,234 | $31M | 0.5% | 2026-Q2 |
| Voss Capital, LP trimmed | 2,650,000 | $26M | 0.4% | 2026-Q2 |
| Prescott General Partners LLC | 2,600,000 | $26M | 0.4% | 2026-Q2 |
| Gotham Asset Management, LLC added | 2,516,444 | $25M | 0.4% | 2026-Q2 |
| Quantinno Capital Management LP added | 2,442,138 | $24M | 0.4% | 2026-Q2 |
| Loews Corp added | 2,200,000 | $22M | 0.3% | 2026-Q2 |
| Western Standard LLC new | 2,109,984 | $21M | 0.3% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 2,027,738 | $20M | 0.3% | 2026-Q2 |
| KETTLE HILL CAPITAL MANAGEMENT, LLC added | 1,860,954 | $18M | 0.3% | 2026-Q2 |
| Corient Private Wealth LP added | 1,764,532 | $17M | 0.3% | 2026-Q2 |
| SHAPIRO CAPITAL MANAGEMENT LLC added | 1,672,410 | $17M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 1,668,123 | $17M | 0.2% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 1,549,887 | $15M | 0.2% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 1,475,242 | $15M | 0.2% | 2026-Q2 |
| LOOMIS SAYLES & CO L P added | 1,473,525 | $15M | 0.2% | 2026-Q2 |
| NEW SOUTH CAPITAL MANAGEMENT INC trimmed | 1,472,617 | $15M | 0.2% | 2026-Q2 |
| Robeco Schweiz AG trimmed | 1,465,796 | $15M | 0.2% | 2026-Q2 |
| MACKENZIE FINANCIAL CORP added | 1,387,469 | $14M | 0.2% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 1,366,575 | $14M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 1,322,800 | $13M | 0.2% | 2026-Q2 |
| Nuveen, LLC trimmed | 1,220,064 | $12M | 0.2% | 2026-Q2 |
| Clearline Capital LP | 1,123,806 | $11M | 0.2% | 2026-Q2 |
| Cerity Partners LLC added | 1,058,769 | $10M | 0.2% | 2026-Q2 |
| Diamond Hill Capital Management, LLC (Investment Advisor) trimmed | 1,046,390 | $10M | 0.2% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 1,023,843 | $10M | 0.2% | 2026-Q2 |
| Squarepoint Ops LLC added | 1,006,446 | $10M | 0.1% | 2026-Q2 |
| Man Group plc added | 990,477 | $10M | 0.1% | 2026-Q2 |
| California Public Employees Retirement System trimmed | 954,435 | $9M | 0.1% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 953,968 | $9M | 0.1% | 2026-Q2 |
| SECTOR GAMMA AS added | 906,088 | $9M | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 893,087 | $9M | 0.1% | 2026-Q2 |
| Legal & General Group Plc trimmed | 888,490 | $9M | 0.1% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 852,961 | $8M | 0.1% | 2026-Q2 |
| BARCLAYS PLC trimmed | 852,468 | $8M | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 841,643 | $7M | 0.1% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 813,548 | $8M | 0.1% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 764,690 | $8M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 763,374 | $8M | 0.1% | 2026-Q2 |
| KING LUTHER CAPITAL MANAGEMENT CORP added | 757,446 | $7M | 0.1% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 753,575 | $7M | 0.1% | 2026-Q2 |
| CastleKnight Management LP new | 751,700 | $7M | 0.1% | 2026-Q2 |
| Retirement Systems of Alabama trimmed | 706,164 | $7M | 0.1% | 2026-Q2 |
| EASTERLY INVESTMENT PARTNERS LLC added | 690,843 | $7M | 0.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 689,853 | $7M | 0.1% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 673,254 | $7M | 0.1% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC added | 640,486 | $6M | 0.1% | 2026-Q2 |
| Melqart Asset Management (UK) Ltd new | 635,800 | $6M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 611,887 | $6M | 0.1% | 2026-Q2 |
| Taikang Asset Management (Hong Kong) Co Ltd trimmed | 585,008 | $6M | 0.1% | 2026-Q2 |
| COMMONWEALTH EQUITY SERVICES, LLC added | 584,942 | $6M | 0.1% | 2026-Q2 |
| ALGERT GLOBAL LLC trimmed | 576,390 | $6M | 0.1% | 2026-Q2 |
| FIFTH THIRD BANCORP added | 564,132 | $6M | 0.1% | 2026-Q2 |
| Assenagon Asset Management S.A. added | 556,871 | $6M | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 551,888 | $5M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM trimmed | 547,380 | $5M | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC trimmed | 541,730 | $5M | 0.1% | 2026-Q2 |
| Creative Planning added | 471,646 | $5M | 0.1% | 2026-Q2 |
| Advisors Capital Management, LLC added | 441,317 | $4M | 0.1% | 2026-Q2 |
| Lightrock Netherlands B.V. trimmed | 322,626 | $11M | 0.2% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.