Avantor, Inc.
US ˙ NYSE ˙ US05352A1007

SecurityAVTR / Avantor, Inc.
InstitutionStifel Financial Corp
Latest Disclosed Ownership10,205 shares
Latest Disclosed Value $ 80,026
Stifel Financial Corp reports 60.74% decrease in ownership of AVTR / Avantor, Inc.

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 10,205 shares of Avantor, Inc. (US:AVTR) valued at $80,007 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 25,994 shares of Avantor, Inc.. This represents a change in shares of -60.74% during the quarter. The current value of the position is $97,152 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)
2026-05-12 2026-03-31 13F AVANTOR COM 05352A100 10,205 -15,789 -60.74 80 -73.06 0.0000
2026-02-13 2025-12-31 13F AVANTOR COM 05352A100 25,994 -2,014 -7.19 298 -14.90 0.0003
2025-11-12 2025-09-30 13F AVANTOR COM 05352A100 28,008 -43,578 -60.88 349 -63.76 0.0003
2025-08-14 2025-06-30 13F AVANTOR COM 05352A100 71,586 32,804 84.59 964 53.34 0.0009
2025-05-14 2025-03-31 13F AVANTOR COM 05352A100 38,782 -3,776 -8.87 629 -29.91 0.0007
2025-02-13 2024-12-31 13F AVANTOR COM 05352A100 42,558 -8,290 -16.30 897 -31.86 0.0009
2024-11-14 2024-09-30 13F AVANTOR COM 05352A100 50,848 10,980 27.54 1,315 55.62 0.0014
2024-08-13 2024-06-30 13F AVANTOR COM 05352A100 39,868 -1,082 -2.64 845 -19.29 0.0010
2024-05-14 2024-03-31 13F AVANTOR COM 05352A100 40,950 -1,316 -3.11 1,047 8.61 0.0012
2024-02-12 2023-12-31 13F AVANTOR COM 05352A100 42,266 325 0.77 965 9.05 0.0012
2023-11-13 2023-09-30 13F AVANTOR COM 05352A100 41,941 5,981 16.63 884 19.78 0.0012
2023-08-14 2023-06-30 13F AVANTOR COM 05352A100 35,960 -5,271 -12.78 739 -15.27 0.0010
2023-05-12 2023-03-31 13F AVANTOR COM 05352A100 41,231 10,760 35.31 872 35.67 0.0012
2023-02-13 2022-12-31 13F AVANTOR COM 05352A100 30,471 11,002 56.51 643 68.50 0.0010
2022-11-14 2022-09-30 13F AVANTOR COM 05352A100 19,469 -41,515 -68.08 381 -79.92 0.0006
2022-08-15 2022-06-30 13F AVANTOR COM 05352A100 60,984 -54,539 -47.21 1,897 -51.45 0.0030
2022-05-13 2022-03-31 13F AVANTOR COM 05352A100 115,523 -4,357 -3.63 3,907 -22.66 0.0053
2022-02-14 2021-12-31 13F AVANTOR COM 05352A100 119,880 -1,487 -1.23 5,052 1.79 0.0067
2021-11-15 2021-09-30 13F AVANTOR COM 05352A100 121,367 -12,006 -9.00 4,963 4.79 0.0073
2021-08-13 2021-06-30 13F AVANTOR COM 05352A100 133,373 74,280 125.70 4,736 177.12 0.0071
2021-05-14 2021-03-31 13F AVANTOR COM 05352A100 59,093 8,677 17.21 1,709 20.44 0.0028
2021-02-12 2020-12-31 13F AVANTOR COM 05352A100 50,416 50,416 1,419 0.0025
2020-05-14 2020-03-31 13F AVANTOR COM 05352A100 0 -76,660 -100.00 0 -100.00
2020-02-13 2019-12-31 13F AVANTOR COM 05352A100 76,660 -32,695 -29.90 1,391 -13.60 0.0029
2019-11-19 2019-09-30 13F/A-1 AVANTOR COM 05352A100 109,355 18,537 20.41 1,610 -7.26 0.0041
2019-11-13 2019-09-30 13F AVANTOR COM 05352A100 109,355 18,537 1,610 902.4857
2019-08-14 2019-06-30 13F AVANTOR COM 05352A100 90,818 90,818 1,736 0.0045
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.