AVANTOR INC AVTR
COM · Common Stock · CUSIP 05352A100 · ISIN US05352A1007
U.S. chemical company
- SectorTechnology
- IndustryLaboratory Analytical Instruments
- HeadquartersRadnor, PA
- Websiteavantorsciences.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($70.2m this quarter). Holder counts are more reliable. Shares outstanding: 681.7m as of 2025-07-28, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $13.46. Options: 19 managers hold calls ($43.7m notional), 19 hold puts ($28.2m).
Trends to Q2 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 440 |
| Q4 2022 | 445 |
| Q1 2023 | 467 |
| Q2 2023 | 444 |
| Q3 2023 | 441 |
| Q4 2023 | 473 |
| Q1 2024 | 498 |
| Q2 2024 | 517 |
| Q3 2024 | 521 |
| Q4 2024 | 495 |
| Q1 2025 | 487 |
| Q2 2025 | 508 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2023 | 229 | 187 |
| Q4 2023 | 228 | 212 |
| Q1 2024 | 261 | 198 |
| Q2 2024 | 260 | 225 |
| Q3 2024 | 277 | 242 |
| Q4 2024 | 209 | 289 |
| Q1 2025 | 251 | 230 |
| Q2 2025 | 306 | 209 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $78.2m | $273.2m | 3.49 |
| Q4 2024 | $52.6m | $144.8m | 2.76 |
| Q1 2025 | $35.7m | $15.7m | 0.44 |
| Q2 2025 | $43.7m | $28.2m | 0.64 |
Biggest buyers
| Dodge & Cox | Added | +17.2m |
| T. Rowe Price Investment Management, Inc. | Added | +14.5m |
| EARNEST PARTNERS LLC | New | +6.1m |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | New | +5.9m |
| Engine Capital Management, LP | New | +5.5m |
| DIMENSIONAL FUND ADVISORS LP | Added | +5.3m |
| Clarkston Capital Partners, LLC | Added | +4.4m |
| Invesco Ltd. | Added | +4.3m |
| BANK OF AMERICA CORP /DE/ | Added | +4.1m |
| FMR LLC | Added | +3.6m |
Biggest sellers
| 1832 Asset Management L.P. | Reduced | -13.6m |
| UBS Group AG | Reduced | -10.6m |
| JANUS HENDERSON GROUP PLC | Reduced | -9.0m |
| CCLA Investment Management | Sold out | -5.8m |
| VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. | Sold out | -5.5m |
| ALLIANCEBERNSTEIN L.P. | Reduced | -5.4m |
| MILLENNIUM MANAGEMENT LLC | Reduced | -5.3m |
| CANADA PENSION PLAN INVESTMENT BOARD | Reduced | -5.1m |
| VOYA INVESTMENT MANAGEMENT LLC | Reduced | -5.1m |
| Pictet Asset Management Holding SA | Reduced | -4.8m |
Biggest calls
| Balyasny Asset Management L.P. | New | $8.1m600.0k shares |
| Arvin Capital Management LP | New | $7.4m550.0k shares |
| CITADEL ADVISORS LLC | Reduced | $6.3m467.3k shares |
| CAPITAL FUND MANAGEMENT S.A. | Added | $4.9m361.3k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $4.4m325.3k shares |
| JANE STREET GROUP, LLC | Added | $2.9m216.9k shares |
| SIMPLEX TRADING, LLC | Reduced | $2.5m186.4k shares |
| IMC-Chicago, LLC | Reduced | $1.7m129.3k shares |
| DeepCurrents Investment Group LLC | New | $1.3m1.0k shares |
| GOLDMAN SACHS GROUP INC | Unchanged | $1.1m80.0k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $8.3m614.5k shares |
| SIMPLEX TRADING, LLC | Added | $4.8m360.4k shares |
| CITADEL ADVISORS LLC | Added | $3.2m238.1k shares |
| CAPITAL FUND MANAGEMENT S.A. | Added | $3.1m231.2k shares |
| IMC-Chicago, LLC | Added | $1.4m105.1k shares |
| Ionic Capital Management LLC | New | $1.3m100.0k shares |
| JANE STREET GROUP, LLC | Reduced | $1.1m84.2k shares |
| GOLDMAN SACHS GROUP INC | Unchanged | $1.1m80.0k shares |
| PEAK6 LLC | Added | $1.1m79.4k shares |
| BARCLAYS PLC | New | $942.2k70.0k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| DODGE & COX 13G · institution +2.6 pts · filed 2025-08-13 | 17.2% |
| BlackRock, Inc. 13G · institution filed 2025-10-17 | 8.7% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.3% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-26; now reported by VANGUARD CAPITAL MANAGEMENT LLC), BARROW HANLEY MEWHINNEY & STRAUSS LLC (4.9%, 2026-02-11), T. Rowe Price Investment Management, Inc. (4.8%, 2025-11-14)
Insider purchases and sales in Q2 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q3 2023 | 0 | — | 2 | $693.1k | — |
| Q4 2023 | 0 | — | 0 | — | — |
| Q1 2024 | 0 | — | 3 | $687.5k | $94.4k |
| Q2 2024 | 0 | — | 0 | — | — |
| Q3 2024 | 0 | — | 2 | $361.1k | $272.8k |
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 2 | $182.6k | $182.6k |
| Q2 2025 | 4 | $1.5m | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2025-05-23 | SUMME GREGORY L Director · By a Trust | Bought | $375.0k30.0k shares |
| 2025-05-22 | SUMME GREGORY L Director · By a Trust | Bought | $253.0k20.0k shares |
| 2025-05-07 | SUMME GREGORY L Director · By a Trust | Bought | $300.0k25.0k shares |
| 2025-04-29 | Massaro Joseph R Director | Bought | $99.6k8.1k shares |
| 2025-04-28 | SUMME GREGORY L Director · By a Trust | Bought | $312.5k25.0k shares |
| 2025-04-28 | Peacock Jonathan M Director | Bought | $103.6k8.1k shares |
| 2025-04-28 | Kang Lan Director | Bought | $62.9k5.0k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2025
| Manager | Shares | Change |
|---|---|---|
| Dodge & Cox 0.89% of their portfolio | 117.4m $1.6bn | Added +17.2m |
| BlackRock, Inc. 0.02% of their portfolio | 71.9m $967.8m | Reduced -831.6k |
| VANGUARD GROUP INC 0.01% of their portfolio | 64.9m $872.9m | Reduced -99.2k |
| T. Rowe Price Investment Management, Inc. 0.48% of their portfolio | 56.5m $760.5m | Added +14.5m |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC 1.41% of their portfolio | 31.2m $419.8m | Added +933.3k |
| STATE STREET CORP 0.01% of their portfolio | 23.5m $316.1m | Reduced -113.2k |
| Invesco Ltd. 0.04% of their portfolio | 15.9m $214.5m | Added +4.3m |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.19% of their portfolio | 15.9m $214.2m | Added +1.9m |
| New Mountain Capital, L.L.C. 100.00% of their portfolio | 14.0m $188.4m | Unchanged |
| Clarkston Capital Partners, LLC 4.00% of their portfolio | 14.0m $188.2m | Added +4.4m |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 11.9m $159.8m | Added +109.2k |
| DIMENSIONAL FUND ADVISORS LP 0.03% of their portfolio | 10.9m $146.7m | Added +5.3m |
| JANUS HENDERSON GROUP PLC 0.06% of their portfolio | 9.7m $130.4m | Reduced -9.0m |
| Robeco Schweiz AG 2.71% of their portfolio | 8.7m $117.5m | Added +438.3k |
| NORGES BANK 0.01% of their portfolio | 8.0m $108.2m | Added +339.4k |
| BANK OF AMERICA CORP /DE/ 0.01% of their portfolio | 7.5m $100.9m | Added +4.1m |
| BESSEMER GROUP INC 0.16% of their portfolio | 7.1m $95.5m | Reduced -2.1m |
| FMR LLC 0.01% of their portfolio | 6.9m $93.1m | Added +3.6m |
| MORGAN STANLEY 0.01% of their portfolio | 6.9m $92.5m | Added +553.3k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 6.5m $87.7m | Added +216.2k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.02% of their portfolio | 6.5m $86.9m | Reduced -124.0k |
| UBS Group AG 0.02% of their portfolio | 6.1m $82.1m | Reduced -10.6m |
| EARNEST PARTNERS LLC 0.37% of their portfolio | 6.1m $82.1m | New |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.03% of their portfolio | 5.9m $78.9m | New |
| Engine Capital Management, LP 15.65% of their portfolio | 5.5m $74.1m | New |
| Bank of New York Mellon Corp 0.01% of their portfolio | 5.0m $67.8m | Added +258.3k |
| VOYA INVESTMENT MANAGEMENT LLC 0.07% of their portfolio | 5.0m $67.1m | Reduced -5.1m |
| TrinityBridge Ltd 1.82% of their portfolio | 4.6m $62.4m | Reduced -7.7k |
| 1832 Asset Management L.P. 0.11% of their portfolio | 4.5m $60.7m | Reduced -13.6m |
| SEI INVESTMENTS CO 0.07% of their portfolio | 4.4m $59.3m | Added +2.9m |
| Woodline Partners LP 0.27% of their portfolio | 3.8m $50.8m | Added +2.4m |
| CITIGROUP INC 0.03% of their portfolio | 3.5m $46.7m | Added +1.2m |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 3.4m $46.3m | Added +146.5k |
| TD Asset Management Inc 0.04% of their portfolio | 3.4m $45.3m | Reduced -98.8k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 3.3m $44.7m | Added +3.1m |
| Balyasny Asset Management L.P. 0.10% of their portfolio | 3.2m $42.9m | New |
| BARCLAYS PLC 0.02% of their portfolio | 3.1m $42.1m | Added +1.1m |
| Legal & General Group Plc 0.01% of their portfolio | 3.1m $41.8m | Reduced -981.0k |
| BROWN BROTHERS HARRIMAN & CO 0.25% of their portfolio | 2.9m $39.6m | Added +13.8k |
| CITADEL ADVISORS LLC 0.03% of their portfolio | 2.8m $37.6m | Added +2.4m |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.24% of their portfolio | 2.7m $36.3m | Added +537.9k |
| Thrivent Financial for Lutherans 0.08% of their portfolio | 2.7m $35.7m | Added +29.6k |
| Freestone Grove Partners LP 0.25% of their portfolio | 2.4m $32.9m | Reduced -51.9k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 2.3m $30.9m | Added +837.1k |
| Clearbridge Investments, LLC 0.02% of their portfolio | 2.2m $29.6m | Added +13.5k |
| Loews Corp 0.24% of their portfolio | 2.1m $28.9m | New |
| Swiss National Bank 0.02% of their portfolio | 2.1m $27.8m | Added +143.1k |
| AQR CAPITAL MANAGEMENT LLC 0.02% of their portfolio | 2.0m $27.5m | Added +1.2m |
| READYSTATE ASSET MANAGEMENT LP 1.12% of their portfolio | 2.0m $27.0m | New |
| DEUTSCHE BANK AG\ 0.01% of their portfolio | 2.0m $26.9m | Added +399.2k |
| FIRST TRUST ADVISORS LP 0.02% of their portfolio | 1.9m $25.8m | Added +1.7m |
| RHUMBLINE ADVISERS 0.02% of their portfolio | 1.9m $25.7m | Added +18.7k |
| Walleye Capital LLC 0.24% of their portfolio | 1.9m $25.5m | Added +1.1m |
| NEW SOUTH CAPITAL MANAGEMENT INC 1.18% of their portfolio | 1.8m $24.4m | Added +25.2k |
| Perpetual Ltd 0.29% of their portfolio | 1.8m $24.3m | Added +60.8k |
| Zuckerman Investment Group, LLC 2.33% of their portfolio | 1.8m $24.0m | Added +512.3k |
| RAYMOND JAMES FINANCIAL INC 0.01% of their portfolio | 1.8m $23.8m | Added +349.4k |
| Amundi 0.01% of their portfolio | 1.8m $24.5m | Added +127.1k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 1.7m $23.1m | Added +314.3k |
| BOONE CAPITAL MANAGEMENT LLC 9.78% of their portfolio | 1.7m $22.8m | New |
| Point72 Asset Management, L.P. 0.05% of their portfolio | 1.6m $22.0m | New |
| AMERIPRISE FINANCIAL INC 0.01% of their portfolio | 1.6m $21.2m | Reduced -84.8k |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 1.5m $20.8m | Reduced -22.2k |
| Sumitomo Mitsui Trust Group, Inc. 0.01% of their portfolio | 1.5m $20.6m | Reduced -11.3k |
| Eversept Partners, LP 2.07% of their portfolio | 1.5m $20.5m | Added +1.4m |
| Holocene Advisors, LP 0.05% of their portfolio | 1.5m $19.6m | Reduced -1.4m |
| Russell Investments Group, Ltd. 0.02% of their portfolio | 1.4m $19.4m | Added +39.2k |
| KINNEY ASSET MANAGEMENT, LLC 24.92% of their portfolio | 1.4m $18.5m | New |
| PRIVATE MANAGEMENT GROUP INC 0.59% of their portfolio | 1.4m $18.2m | New |
| Stanley Capital Management, LLC 2.99% of their portfolio | 1.3m $17.7m | Reduced -179.2k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 1.3m $17.7m | Added +244.5k |
| GREAT LAKES ADVISORS, LLC 0.14% of their portfolio | 1.3m $17.2m | Reduced -4.4k |
| RENAISSANCE TECHNOLOGIES LLC 0.02% of their portfolio | 1.2m $16.6m | New |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.02% of their portfolio | 1.2m $16.0m | Added +114.0k |
| Nuveen, LLC 0.00% of their portfolio | 1.2m $15.9m | Reduced -178.9k |
| Connor, Clark & Lunn Investment Management Ltd. 0.06% of their portfolio | 1.2m $15.8m | Added +74.4k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 1.2m $15.5m | Reduced -11.1k |
| CNA FINANCIAL CORP 7.94% of their portfolio | 1.1m $15.5m | New |
| MACQUARIE GROUP LTD 0.02% of their portfolio | 1.1m $15.4m | Reduced -51.0k |
| Nearwater Capital Markets, Ltd 0.22% of their portfolio | 1.0m $13.5m | New |
| Arvin Capital Management LP 3.78% of their portfolio | 983.1k $13.2m | New |
| Impax Asset Management Group plc 0.07% of their portfolio | 964.4k $13.0m | Reduced -260.9k |
| California Public Employees Retirement System 0.01% of their portfolio | 929.0k $12.5m | Added +89.8k |
| Quantinno Capital Management LP 0.05% of their portfolio | 914.0k $12.3m | Added +532.5k |
| NORRIS PERNE & FRENCH LLP/MI 0.86% of their portfolio | 912.3k $12.3m | Reduced -44.3k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 868.0k $11.7m | Reduced -5.4m |
| NATIXIS ADVISORS, LLC 0.02% of their portfolio | 848.5k $11.4m | Added +613.0k |
| Retirement Systems of Alabama 0.04% of their portfolio | 832.9k $11.2m | Added +4.1k |
| WILSON ASSET MANAGEMENT (INTERNATIONAL) PTY LTD 2.67% of their portfolio | 805.7k $10.8m | Unchanged |
| MOORE CAPITAL MANAGEMENT, LP 0.21% of their portfolio | 779.6k $10.5m | Added +25.8k |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.02% of their portfolio | 760.0k $10.2m | Added +460.0k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 757.1k $10.2m | Added +74.7k |
| Medina Value Partners, LLC 2.73% of their portfolio | 740.3k $10.0m | New |
| PEREGRINE CAPITAL MANAGEMENT LLC 0.29% of their portfolio | 719.9k $9.7m | Reduced -235.2k |
| Olstein Capital Management, L.P. 1.71% of their portfolio | 679.0k $9.1m | Added +111.0k |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.08% of their portfolio | 653.2k $8.8m | Reduced -748.3k |
| Pacific Capital Partners Ltd 8.23% of their portfolio | 652.0k $8.8m | Reduced -284.0k |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.02% of their portfolio | 640.6k $8.6m | Added +8.6k |
| DekaBank Deutsche Girozentrale 0.01% of their portfolio | 628.1k $8.3m | Added +227.3k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio | 603.9k $8.1m | Added +554.5k |