Avantor, Inc.
US ˙ NYSE ˙ US05352A1007

SecurityAVTR / Avantor, Inc.
InstitutionQuantinno Capital Management LP
Latest Disclosed Ownership1,169,147 shares
Latest Disclosed Value $ 9,166,120
Quantinno Capital Management LP reports 187.36% increase in ownership of AVTR / Avantor, Inc.

On May 15, 2026 - Quantinno Capital Management LP filed a 13F-HR form disclosing ownership of 1,169,147 shares of Avantor, Inc. (US:AVTR) valued at $9,166,112 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 406,859 shares of Avantor, Inc.. This represents a change in shares of 187.36% during the quarter. The current value of the position is $11,130,279 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 1,169,147 762,288 187.36 9,166 96.61 0.0153
2026-02-17 2025-12-31 13F AVANTOR COM 05352A100 406,859 -126,720 -23.75 4,663 -29.99 0.0094
2025-11-14 2025-09-30 13F AVANTOR COM 05352A100 533,579 -380,438 -41.62 6,659 -45.87 0.0182
2025-08-14 2025-06-30 13F AVANTOR COM 05352A100 914,017 532,471 139.56 12,303 98.93 0.0531
2025-05-12 2025-03-31 13F AVANTOR COM 05352A100 381,546 271,710 247.38 6,185 167.24 0.0403
2025-02-14 2024-12-31 13F AVANTOR COM 05352A100 109,836 -30,065 -21.49 2,314 -36.06 0.0228
2024-11-14 2024-09-30 13F AVANTOR COM 05352A100 139,901 51,075 57.50 3,619 92.19 0.0471
2024-08-14 2024-06-30 13F AVANTOR COM 05352A100 88,826 -2,491 -2.73 1,883 -19.36 0.0339
2024-05-14 2024-03-31 13F AVANTOR COM 05352A100 91,317 27,162 42.34 2,335 59.39 0.0508
2024-02-14 2023-12-31 13F AVANTOR COM 05352A100 64,155 -7,609 -10.60 1,465 -3.17 0.0513
2023-11-14 2023-09-30 13F AVANTOR COM 05352A100 71,764 71,764 1,513 0.0689
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.