Avantor, Inc.
US ˙ NYSE ˙ US05352A1007

SecurityAVTR / Avantor, Inc.
InstitutionBarclays Plc
Latest Disclosed Ownership967,555 shares
Latest Disclosed Value $ 11,088,181
Barclays Plc ownership in AVTR / Avantor, Inc.

On February 13, 2026 - Barclays Plc filed a 13F-HR form disclosing ownership of 967,555 shares of Avantor, Inc. (US:AVTR) valued at $11,088,180 USD as of December 31, 2025. The entity filed a previous 13F-HR/A on March 31, 2026 disclosing 1,117,158 shares of Avantor, Inc.. This represents a change in shares of -13.39% during the quarter. The current value of the position is $8,775,724 USD.

Barclays Plc has a history of taking positions in derivatives of the underlying security (AVTR) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

AVTR / Avantor, Inc. Historical Put/Call Ratio
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)
2026-02-13 2025-12-31 13F AVANTOR COM 05352A100 967,555 -149,603 -13.39 11,088 -20.47 0.0027
2026-03-31 2025-09-30 13F/A-3 AVANTOR COM 05352A100 1,117,158 -2,008,122 -64.25 13,942 -66.86 0.0030
2026-03-19 2025-09-30 13F/A-2 AVANTOR COM 05352A100 981,952 -2,143,328 25,403 0.0067
2025-11-12 2025-09-30 13F AVANTOR COM 05352A100 1,117,158 -2,008,122 13,942 0.0030
2026-02-27 2025-06-30 13F/A-2 AVANTOR COM 05352A100 3,125,280 1,148,655 58.11 42,066 31.29 0.0096
2025-08-14 2025-06-30 13F/A-1 AVANTOR COM 05352A100 3,125,280 1,148,655 42 0.0096
2025-08-13 2025-06-30 13F AVANTOR COM 05352A100 3,125,280 1,148,655 42 0.0031
2026-03-17 2025-03-31 13F/A-1 AVANTOR COM 05352A100 1,976,625 714,097 56.56 32,041 20.45 0.0091
2025-05-15 2025-03-31 13F AVANTOR COM 05352A100 1,976,625 714,097 32 0.0091
2026-03-19 2024-12-31 13F/A-1 AVANTOR COM 05352A100 1,262,528 280,576 28.57 26,601 4.72 0.0075
2025-02-13 2024-12-31 13F AVANTOR COM 05352A100 1,262,528 280,576 27 0.0075
2026-03-31 2024-09-30 13F/A-2 AVANTOR COM 05352A100 981,952 401,642 69.21 25,403 106.49 0.0067
2024-11-19 2024-09-30 13F/A-1 AVANTOR COM 05352A100 981,952 401,642 25 0.0067
2024-11-15 2024-09-30 13F AVANTOR COM 05352A100 981,952 401,642 25 0.0020
2026-03-23 2024-06-30 13F/A-1 AVANTOR COM 05352A100 580,310 -325,993 -35.97 12,303 -46.91 0.0038
2024-08-14 2024-06-30 13F AVANTOR COM 05352A100 580,310 -325,993 12 0.0038
2026-03-24 2024-03-31 13F/A-1 AVANTOR COM 05352A100 906,303 149,795 19.80 23,174 34.18 0.0081
2024-05-15 2024-03-31 13F AVANTOR COM 05352A100 906,303 149,795 23 0.0081
2026-03-25 2023-12-31 13F/A-1 AVANTOR COM 05352A100 756,508 303,857 67.13 17,271 81.02 0.0063
2024-02-15 2023-12-31 13F AVANTOR COM 05352A100 756,508 303,857 17 0.0063
2026-03-26 2023-09-30 13F/A-1 AVANTOR COM 05352A100 452,651 -117,243 -20.57 9,542 -18.49 0.0059
2023-11-07 2023-09-30 13F AVANTOR COM 05352A100 452,651 -117,243 10 0.0059
2026-03-30 2023-06-30 13F/A-2 AVANTOR COM 05352A100 569,894 33,829 6.31 11,706 3.29 0.0074
2023-09-20 2023-06-30 13F/A-1 AVANTOR COM 05352A100 569,894 33,829 12 0.0074
2023-08-03 2023-06-30 13F AVANTOR COM 05352A100 569,894 33,829 12 0.0074
2026-03-30 2023-03-31 13F/A-1 AVANTOR COM 05352A100 536,065 -113,226 -17.44 11,332 -17.24 0.0052
2023-05-04 2023-03-31 13F AVANTOR COM 05352A100 536,065 -113,226 11 0.0052
2026-03-30 2022-12-31 13F/A-1 AVANTOR COM 05352A100 649,291 132,023 25.52 13,694 35.05 0.0061
2023-02-13 2022-12-31 13F AVANTOR COM 05352A100 649,291 132,023 14 0.0061
2022-11-03 2022-09-30 13F AVANTOR COM 05352A100 517,268 104,426 25.29 10,139 -21.03 0.0111
2022-08-12 2022-06-30 13F AVANTOR COM 05352A100 412,842 61,842 17.62 12,839 8.15 0.0079
2022-05-16 2022-03-31 13F AVANTOR COM 05352A100 351,000 -30,038 -7.88 11,871 -26.08 0.0093
2022-02-23 2021-12-31 13F/A-1 AVANTOR COM 05352A100 381,038 -248,308 -39.45 16,059 -37.61 0.0060
2022-02-14 2021-12-31 13F AVANTOR COM 05352A100 381,038 -248,308 16,059 0.0060
2021-11-09 2021-09-30 13F AVANTOR COM 05352A100 629,346 274,776 77.50 25,740 104.43 0.0116
2021-08-13 2021-06-30 13F AVANTOR COM 05352A100 354,570 10,443 3.03 12,591 26.48 0.0059
2021-05-13 2021-03-31 13F AVANTOR COM 05352A100 344,127 85,035 32.82 9,955 36.50 0.0053
2021-02-11 2020-12-31 13F AVANTOR COM 05352A100 259,092 -9,241 -3.44 7,293 20.85 0.0039
2020-11-12 2020-09-30 13F AVANTOR COM 05352A100 268,333 42,414 18.77 6,035 57.12 0.0036
2020-08-12 2020-06-30 13F AVANTOR COM 05352A100 225,919 195,362 639.34 3,841 905.50 0.0030
2020-05-13 2020-03-31 13F AVANTOR COM 05352A100 30,557 29,357 2,446.42 382 1,636.36 0.0003
2020-02-10 2019-12-31 13F AVANTOR COM 05352A100 1,200 -20,636 -94.50 22 -93.15 0.0000
2019-11-15 2019-09-30 13F/A-1 AVANTOR COM 05352A100 21,836 19,709 926.61 321 702.50 0.0002
2019-11-14 2019-09-30 13F AVANTOR COM 05352A100 21,836 19,709 321 74.2156
2019-08-14 2019-06-30 13F AVANTOR COM 05352A100 2,127 2,127 40 0.0000
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2024-11-19 2024-09-30 13F/A AVANTOR OPT Call 0 0 n/a n/a n/a
2026-03-31 2024-09-30 13F/A AVANTOR OPT Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-11-15 2024-09-30 13F AVANTOR OPT Call 0 0 n/a n/a n/a
2026-03-23 2024-06-30 13F/A AVANTOR OPT Call 725,500 15,381 n/a n/a n/a
2024-08-14 2024-06-30 13F AVANTOR OPT Call 725,500 15 n/a n/a n/a
2026-03-24 2024-03-31 13F/A AVANTOR OPT Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F AVANTOR OPT Call 0 0 n/a n/a n/a
2026-03-25 2023-12-31 13F/A AVANTOR OPT Call 360,000 8,219 n/a n/a n/a
2024-02-15 2023-12-31 13F AVANTOR OPT Call 360,000 8 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-02-13 2025-12-31 13F AVANTOR OPT Put 0 -100.00 0 -100.00 n/a n/a n/a
2026-03-19 2025-09-30 13F/A AVANTOR OPT Put 865,500 1,136.43 22,390 2,276.86 n/a n/a n/a
2025-08-14 2025-06-30 13F/A AVANTOR OPT Put 70,000 1 n/a n/a n/a
2026-02-27 2025-06-30 13F/A AVANTOR OPT Put 70,000 942 n/a n/a n/a
2026-03-17 2025-03-31 13F/A AVANTOR OPT Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-15 2025-03-31 13F AVANTOR OPT Put 0 0 n/a n/a n/a
2026-03-19 2024-12-31 13F/A AVANTOR OPT Put 3,971,300 358.84 83,675 273.72 n/a n/a n/a
2025-02-13 2024-12-31 13F AVANTOR OPT Put 3,971,300 84 n/a n/a n/a
2024-11-19 2024-09-30 13F/A AVANTOR OPT Put 865,500 22 n/a n/a n/a
2026-03-31 2024-09-30 13F/A AVANTOR OPT Put 865,500 22,390 n/a n/a n/a
2024-11-15 2024-09-30 13F AVANTOR OPT Put 865,500 22 n/a n/a n/a
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.