Avantor, Inc.
US ˙ NYSE ˙ US05352A1007

SecurityAVTR / Avantor, Inc.
InstitutionD. E. Shaw & Co., Inc.
ManagerDE Shaw
Latest Disclosed Ownership13,110,674 shares
Latest Disclosed Value $ 102,787,684
D. E. Shaw & Co., Inc. reports 110.92% increase in ownership of AVTR / Avantor, Inc.

On May 15, 2026 - D. E. Shaw & Co., Inc. filed a 13F-HR form disclosing ownership of 13,110,674 shares of Avantor, Inc. (US:AVTR) valued at $102,787,684 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 6,215,923 shares of Avantor, Inc.. This represents a change in shares of 110.92% during the quarter. The current value of the position is $118,913,813 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 13,110,674 6,894,751 110.92 102,788 44.29 0.0618
2026-02-17 2025-12-31 13F AVANTOR COM 05352A100 6,215,923 4,835,148 350.18 71,234 313.38 0.0390
2025-11-14 2025-09-30 13F AVANTOR COM 05352A100 1,380,775 1,358,707 6,156.91 17,232 5,702.02 0.0097
2025-08-14 2025-06-30 13F AVANTOR COM 05352A100 22,068 -239,289 -91.56 297 -92.99 0.0002
2025-05-15 2025-03-31 13F AVANTOR COM 05352A100 261,357 -37,215 -12.46 4,237 -32.66 0.0038
2025-02-14 2024-12-31 13F AVANTOR COM 05352A100 298,572 267,622 864.69 6,291 686.25 0.0046
2024-11-14 2024-09-30 13F AVANTOR COM 05352A100 30,950 -201,036 -86.66 801 -83.73 0.0007
2024-08-14 2024-06-30 13F AVANTOR COM 05352A100 231,986 -799,552 -77.51 4,918 -81.35 0.0046
2024-05-15 2024-03-31 13F AVANTOR COM 05352A100 1,031,538 890,939 633.67 26,376 721.94 0.0226
2024-02-14 2023-12-31 13F AVANTOR COM 05352A100 140,599 113,766 423.98 3,210 467.96 0.0028
2023-11-14 2023-09-30 13F AVANTOR COM 05352A100 26,833 -9,130 -25.39 566 -23.44 0.0006
2023-08-14 2023-06-30 13F AVANTOR COM 05352A100 35,963 -1,470,036 -97.61 739 -97.68 0.0008
2023-05-15 2023-03-31 13F AVANTOR COM 05352A100 1,505,999 -2,823,330 -65.21 31,837 -65.13 0.0341
2023-02-14 2022-12-31 13F AVANTOR COM 05352A100 4,329,329 1,508,548 53.48 91,306 65.14 0.1009
2022-11-14 2022-09-30 13F AVANTOR COM 05352A100 2,820,781 1,451,897 106.06 55,288 29.87 0.0660
2022-08-15 2022-06-30 13F AVANTOR COM 05352A100 1,368,884 -419,503 -23.46 42,572 -29.61 0.0499
2022-05-16 2022-03-31 13F AVANTOR COM 05352A100 1,788,387 69,999 4.07 60,483 -16.47 0.0566
2022-02-14 2021-12-31 13F AVANTOR COM 05352A100 1,718,388 1,022,816 147.05 72,413 154.54 0.0600
2021-11-15 2021-09-30 13F AVANTOR COM 05352A100 695,572 564,330 429.99 28,449 510.49 0.0257
2021-08-16 2021-06-30 13F AVANTOR COM 05352A100 131,242 115,473 732.28 4,660 921.93 0.0040
2021-05-17 2021-03-31 13F AVANTOR COM 05352A100 15,769 15,769 456 0.0004
2021-02-16 2020-12-31 13F AVANTOR COM 05352A100 0 -66,278 -100.00 0 -100.00
2020-11-16 2020-09-30 13F AVANTOR COM 05352A100 66,278 66,278 1,491 0.0015
2020-08-14 2020-06-30 13F AVANTOR COM 05352A100 0 -74,194 -100.00 0 -100.00
2020-05-15 2020-03-31 13F AVANTOR COM 05352A100 74,194 -12,157 -14.08 927 -26.95 0.0014
2019-11-14 2019-09-30 13F AVANTOR COM 05352A100 86,351 86,351 1,269 0.0016
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.