Avantor, Inc.
US ˙ NYSE ˙ US05352A1007

SecurityAVTR / Avantor, Inc.
InstitutionBoston Partners
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Boston Partners closes position in AVTR / Avantor, Inc.

On May 11, 2026 - Boston Partners filed a 13F-HR form disclosing ownership of 0 shares of Avantor, Inc. (US:AVTR) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 433,421 shares of Avantor, Inc.. The current value of the position is $0 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-11 2026-03-31 13F AVANTOR COM 05352A100 0 -100.00 0
2026-02-13 2025-12-31 13F AVANTOR COM 05352A100 433,421 433,421 4,968 0.0051
2025-08-12 2025-06-30 13F/A-1 AVANTOR COM 05352A100 0 -51,472 -100.00 0 -100.00
2025-08-07 2025-06-30 13F AVANTOR COM 05352A100 0 0
2025-05-13 2025-03-31 13F AVANTOR COM 05352A100 51,472 -6,370,996 -99.20 834 -99.38 0.0010
2025-02-11 2024-12-31 13F AVANTOR COM 05352A100 6,422,468 -12,704,887 -66.42 135,339 -72.62 0.1646
2024-11-12 2024-09-30 13F AVANTOR COM 05352A100 19,127,355 -104,570 -0.54 494,265 21.28 0.5833
2024-08-14 2024-06-30 13F AVANTOR COM 05352A100 19,231,925 -9,329,877 -32.67 407,535 -44.12 0.5063
2024-05-28 2024-03-31 13F/A-1 AVANTOR COM 05352A100 28,561,802 624,369 2.23 729,298 14.43 0.8687
2024-05-13 2024-03-31 13F AVANTOR COM 05352A100 28,561,802 624,369 729,298 0.3609
2024-02-07 2023-12-31 13F AVANTOR COM 05352A100 27,937,433 -139,593 -0.50 637,304 8.32 0.8441
2023-11-08 2023-09-30 13F AVANTOR COM 05352A100 28,077,026 4,948,951 21.40 588,362 23.82 0.8146
2023-08-10 2023-06-30 13F AVANTOR COM 05352A100 23,128,075 6,736,666 41.10 475,175 37.33 0.6396
2023-05-09 2023-03-31 13F AVANTOR COM 05352A100 16,391,409 -1,468,514 -8.22 346,000 -8.58 0.4757
2023-02-08 2022-12-31 13F AVANTOR COM 05352A100 17,859,923 -2,374,994 -11.74 378,461 -4.53 0.5120
2022-11-09 2022-09-30 13F AVANTOR COM 05352A100 20,234,917 -2,471,901 -10.89 396,437 -43.80 0.5802
2022-08-10 2022-06-30 13F AVANTOR COM 05352A100 22,706,818 2,934,878 14.84 705,405 5.57 0.9859
2022-05-10 2022-03-31 13F AVANTOR COM 05352A100 19,771,940 806,442 4.25 668,176 -16.28 0.8094
2022-02-04 2021-12-31 13F AVANTOR COM 05352A100 18,965,498 -615,160 -3.14 798,153 -0.34 0.9614
2021-11-05 2021-09-30 13F AVANTOR COM 05352A100 19,580,658 -1,653,951 -7.79 800,865 6.20 1.0146
2021-08-12 2021-06-30 13F AVANTOR COM 05352A100 21,234,609 3,120,341 17.23 754,082 43.73 0.9617
2021-05-10 2021-03-31 13F AVANTOR COM 05352A100 18,114,268 381,330 2.15 524,636 5.10 0.7036
2021-02-10 2020-12-31 13F/A-1 AVANTOR COM 05352A100 17,732,938 -1,272,443 -6.70 499,182 16.79 0.7763
2021-02-04 2020-12-31 13F AVANTOR COM 05352A100 17,732,938 -1,272,443 499,182 299,479.5294
2020-11-13 2020-09-30 13F/A-1 AVANTOR COM 05352A100 19,005,381 1,569,620 9.00 427,430 44.17 0.7783
2020-11-09 2020-09-30 13F AVANTOR COM 05352A100 17,435,761 0 296,476 217,648.7009
2020-08-12 2020-06-30 13F AVANTOR COM 05352A100 17,435,761 8,157,812 87.93 296,476 155.94 0.5446
2020-05-13 2020-03-31 13F AVANTOR COM 05352A100 9,277,949 556,523 6.38 115,840 -26.83 0.2300
2020-02-06 2019-12-31 13F/A-1 AVANTOR COM 05352A100 8,721,426 -200,690 -2.25 158,307 20.69 0.2094
2020-02-05 2019-12-31 13F AVANTOR COM 05352A100 8,721,426 -200,690 158,307 89,004.8191
2019-11-20 2019-09-30 13F/A-1 AVANTOR COM 05352A100 8,922,116 210,519 2.42 131,165 -21.11 0.1776
2019-11-08 2019-09-30 13F AVANTOR COM 05352A100 8,715,058 3,461 165,927 0.2195
2019-08-26 2019-06-30 13F/A-1 AVANTOR COM 05352A100 8,711,597 8,711,597 166,254 0.2180
2019-08-09 2019-06-30 13F AVANTOR COM 05352A100 99,604 1,852 0.0025
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.