Avantor, Inc.
US ˙ NYSE ˙ US05352A1007

SecurityAVTR / Avantor, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership5,458,656 shares
Latest Disclosed Value $ 42,795,863
Northern Trust Corp reports 2.81% increase in ownership of AVTR / Avantor, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 5,458,656 shares of Avantor, Inc. (US:AVTR) valued at $42,795,863 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 5,309,454 shares of Avantor, Inc.. This represents a change in shares of 2.81% during the quarter. The current value of the position is $51,966,405 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)
2026-05-14 2026-03-31 13F AVANTOR COM 05352A100 5,458,656 149,202 2.81 42,796 -29.67 0.0012
2026-02-17 2025-12-31 13F AVANTOR COM 05352A100 5,309,454 -251,563 -4.52 60,846 -12.33 0.0016
2025-11-14 2025-09-30 13F AVANTOR COM 05352A100 5,561,017 -953,396 -14.64 69,401 -20.85 0.0089
2025-08-13 2025-06-30 13F AVANTOR COM 05352A100 6,514,413 216,218 3.43 87,684 -14.11 0.0121
2025-05-13 2025-03-31 13F AVANTOR COM 05352A100 6,298,195 127,561 2.07 102,094 -21.48 0.0152
2025-02-14 2024-12-31 13F AVANTOR COM 05352A100 6,170,634 1,101,407 21.73 130,015 -0.86 0.0184
2024-11-13 2024-09-30 13F AVANTOR COM 05352A100 5,069,227 1,209,283 31.33 131,141 60.26 0.0215
2024-08-14 2024-06-30 13F AVANTOR COM 05352A100 3,859,944 220,871 6.07 81,831 -12.06 0.0138
2024-05-14 2024-03-31 13F AVANTOR COM 05352A100 3,639,073 -209,202 -5.44 93,051 5.91 0.0161
2024-02-13 2023-12-31 13F AVANTOR COM 05352A100 3,848,275 -281,172 -6.81 87,856 0.93 0.0159
2023-11-13 2023-09-30 13F AVANTOR COM 05352A100 4,129,447 342,553 9.05 87,049 11.91 0.0169
2023-08-11 2023-06-30 13F AVANTOR COM 05352A100 3,786,894 -119,162 -3.05 77,783 -5.80 0.0149
2023-05-15 2023-03-31 13F AVANTOR COM 05352A100 3,906,056 -12,238 -0.31 82,574 -0.08 0.0164
2023-02-13 2022-12-31 13F AVANTOR COM 05352A100 3,918,294 166,068 4.43 82,637 12.36 0.0173
2022-11-14 2022-09-30 13F AVANTOR COM 05352A100 3,752,226 154,941 4.31 73,544 -34.26 0.0168
2022-08-12 2022-06-30 13F AVANTOR COM 05352A100 3,597,285 -53,028 -1.45 111,875 -9.38 0.0240
2022-05-13 2022-03-31 13F AVANTOR COM 05352A100 3,650,313 80,710 2.26 123,454 -17.93 0.0217
2022-02-08 2021-12-31 13F AVANTOR COM 05352A100 3,569,603 86,349 2.48 150,423 5.59 0.0246
2021-11-15 2021-09-30 13F AVANTOR COM 05352A100 3,483,254 -104,280 -2.91 142,466 11.83 0.0252
2021-08-13 2021-06-30 13F AVANTOR COM 05352A100 3,587,534 481,316 15.50 127,393 41.77 0.0224
2021-05-12 2021-03-31 13F AVANTOR COM 05352A100 3,106,218 12,771 0.41 89,862 3.19 0.0167
2021-02-11 2020-12-31 13F AVANTOR COM 05352A100 3,093,447 305,191 10.95 87,081 38.87 0.0170
2020-11-16 2020-09-30 13F AVANTOR COM 05352A100 2,788,256 424,040 17.94 62,708 56.03 0.0138
2020-08-14 2020-06-30 13F AVANTOR COM 05352A100 2,364,216 1,003,152 73.70 40,190 136.41 0.0095
2020-05-14 2020-03-31 13F AVANTOR COM 05352A100 1,361,064 82,874 6.48 17,000 -26.72 0.0049
2020-02-14 2019-12-31 13F AVANTOR COM 05352A100 1,278,190 167,020 15.03 23,199 42.02 0.0052
2019-11-13 2019-09-30 13F AVANTOR COM 05352A100 1,111,170 675,143 154.84 16,335 96.24 0.0039
2019-08-13 2019-06-30 13F AVANTOR COM 05352A100 436,027 436,027 8,324 0.0020
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.