Avantor, Inc.
US ˙ NYSE ˙ US05352A1007

SecurityAVTR / Avantor, Inc.
InstitutionFmr Llc
Latest Disclosed Ownership7,610,318 shares
Latest Disclosed Value $ 59,664,887
Fmr Llc reports 0.79% decrease in ownership of AVTR / Avantor, Inc.

On May 15, 2026 - Fmr Llc filed a 13F-HR form disclosing ownership of 7,610,318 shares of Avantor, Inc. (US:AVTR) valued at $59,664,893 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 7,670,732 shares of Avantor, Inc.. This represents a change in shares of -0.79% during the quarter. The current value of the position is $72,450,227 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)
2026-05-15 2026-03-31 13F AVANTOR COM 05352A100 7,610,318 -60,414 -0.79 59,665 -32.13 0.0006
2026-02-17 2025-12-31 13F AVANTOR COM 05352A100 7,670,732 48,902 0.64 87,907 -7.58 0.0045
2025-11-13 2025-09-30 13F AVANTOR COM 05352A100 7,621,830 706,358 10.21 95,120 2.19 0.0049
2025-08-14 2025-06-30 13F AVANTOR COM 05352A100 6,915,472 3,625,184 110.18 93,082 74.52 0.0052
2025-05-12 2025-03-31 13F AVANTOR COM 05352A100 3,290,288 -3,701,808 -52.94 53,336 -63.80 0.0034
2025-02-13 2024-12-31 13F AVANTOR COM 05352A100 6,992,096 2,316,813 49.55 147,323 21.81 0.0088
2024-11-13 2024-09-30 13F AVANTOR COM 05352A100 4,675,283 3,963,912 557.22 120,950 702.00 0.0074
2024-08-13 2024-06-30 13F AVANTOR COM 05352A100 711,371 338,413 90.74 15,081 58.15 0.0010
2024-05-13 2024-03-31 13F AVANTOR COM 05352A100 372,958 15,446 4.32 9,537 16.85 0.0006
2024-02-13 2023-12-31 13F AVANTOR COM 05352A100 357,512 189,821 113.20 8,162 130.93 0.0006
2023-11-13 2023-09-30 13F AVANTOR COM 05352A100 167,691 -26,833 -13.79 3,535 -11.54 0.0003
2023-08-11 2023-06-30 13F AVANTOR COM 05352A100 194,524 -288,281 -59.71 3,996 -60.86 0.0003
2023-08-11 2023-03-31 13F/A-1 AVANTOR COM 05352A100 482,805 96,562 25.00 10,206 25.30 0.0009
2023-05-11 2023-03-31 13F AVANTOR COM 05352A100 482,805 96,562 10,206 0.0002
2023-02-13 2022-12-31 13F AVANTOR COM 05352A100 386,243 -3,236,006 -89.34 8,146 -88.53 0.0008
2022-11-10 2022-09-30 13F AVANTOR COM 05352A100 3,622,249 -14,201,572 -79.68 70,996 -87.19 0.0074
2022-08-12 2022-06-30 13F AVANTOR COM 05352A100 17,823,821 -2,477,496 -12.20 554,320 -19.26 0.0552
2022-05-13 2022-03-31 13F AVANTOR COM 05352A100 20,301,317 1,451,175 7.70 686,591 -13.57 0.0549
2022-02-14 2021-12-31 13F AVANTOR COM 05352A100 18,850,142 1,283,110 7.30 794,345 10.56 0.0587
2022-02-14 2021-09-30 13F/A-1 AVANTOR COM 05352A100 17,567,032 2,943,757 20.13 718,492 38.37 0.0570
2021-11-15 2021-09-30 13F AVANTOR COM 05352A100 17,567,032 2,943,757 718,492 0.0570
2021-08-13 2021-06-30 13F AVANTOR COM 05352A100 14,623,275 1,430,029 10.84 519,272 36.05 0.0407
2021-05-14 2021-03-31 13F AVANTOR COM 05352A100 13,193,246 8,409,333 175.78 381,681 183.43 0.0326
2021-02-08 2020-12-31 13F AVANTOR COM 05352A100 4,783,913 4,709,400 6,320.24 134,667 7,935.02 0.0120
2020-11-13 2020-09-30 13F AVANTOR COM 05352A100 74,513 73,035 4,941.47 1,676 6,604.00 0.0002
2020-08-24 2020-06-30 13F/A-1 AVANTOR COM 05352A100 1,478 -1,802,625 -99.92 25 -99.89 0.0000
2020-08-13 2020-06-30 13F AVANTOR COM 05352A100 1,478 -273,472 25 0.6142
2020-05-14 2020-03-31 13F AVANTOR COM 05352A100 1,804,103 -2,906,040 -61.70 22,533 -73.64 0.0031
2020-02-07 2019-12-31 13F AVANTOR COM 05352A100 4,710,143 -20,439,220 -81.27 85,489 -76.88 0.0094
2019-11-13 2019-09-30 13F AVANTOR COM 05352A100 25,149,363 1,926,058 8.29 369,696 -16.61 0.0443
2019-08-13 2019-06-30 13F AVANTOR COM 05352A100 23,223,305 23,223,305 443,333 0.0518
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.