Montauk Renewables, Inc.
US ˙ NasdaqCM ˙ US61218C1036

SecurityMNTK / Montauk Renewables, Inc.
InstitutionBarclays Plc
Latest Disclosed Ownership109,376 shares
Latest Disclosed Value $ 182,658
Barclays Plc reports 55.84% decrease in ownership of MNTK / Montauk Renewables, Inc.

On February 13, 2026 - Barclays Plc filed a 13F-HR form disclosing ownership of 109,376 shares of Montauk Renewables, Inc. (US:MNTK) valued at $182,658 USD as of December 31, 2025. The entity filed a previous 13F-HR/A on March 31, 2026 disclosing 247,656 shares of Montauk Renewables, Inc.. This represents a change in shares of -55.84% during the quarter. The current value of the position is $181,564 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)
2026-02-13 2025-12-31 13F MONTAUK RENEWABLES COM 61218C103 109,376 -138,280 -55.84 183 -63.38 0.0000
2026-03-31 2025-09-30 13F/A-3 MONTAUK RENEWABLES COM 61218C103 247,656 90,897 57.99 498 42.82 0.0001
2026-03-19 2025-09-30 13F/A-2 MONTAUK RENEWABLES COM 61218C103 136,360 -20,399 710 0.0002
2025-11-12 2025-09-30 13F MONTAUK RENEWABLES COM 61218C103 247,656 90,897 498 0.0001
2026-02-27 2025-06-30 13F/A-2 MONTAUK RENEWABLES COM 61218C103 156,759 -37,397 -19.26 348 -14.07 0.0001
2025-08-14 2025-06-30 13F/A-1 MONTAUK RENEWABLES COM 61218C103 156,759 -37,397 0 0.0001
2025-08-13 2025-06-30 13F MONTAUK RENEWABLES COM 61218C103 156,759 -37,397 0 0.0000
2026-03-17 2025-03-31 13F/A-1 MONTAUK RENEWABLES COM 61218C103 194,156 60,193 44.93 406 -24.02 0.0001
2025-05-15 2025-03-31 13F MONTAUK RENEWABLES COM 61218C103 194,156 60,193 0 0.0001
2026-03-19 2024-12-31 13F/A-1 MONTAUK RENEWABLES COM 61218C103 133,963 -2,397 -1.76 533 -24.93 0.0001
2025-02-13 2024-12-31 13F MONTAUK RENEWABLES COM 61218C103 133,963 -2,397 1 0.0001
2026-03-31 2024-09-30 13F/A-2 MONTAUK RENEWABLES COM 61218C103 136,360 -65,644 -32.50 710 -38.31 0.0002
2024-11-19 2024-09-30 13F/A-1 MONTAUK RENEWABLES COM 61218C103 136,360 -65,644 1 0.0002
2024-11-15 2024-09-30 13F MONTAUK RENEWABLES COM 61218C103 136,360 -65,644 1 0.0001
2026-03-23 2024-06-30 13F/A-1 MONTAUK RENEWABLES COM 61218C103 202,004 -22,337 -9.96 1,151 23.37 0.0004
2024-08-14 2024-06-30 13F MONTAUK RENEWABLES COM 61218C103 202,004 -22,337 1 0.0004
2026-03-24 2024-03-31 13F/A-1 MONTAUK RENEWABLES COM 61218C103 224,341 21,632 10.67 933 -48.34 0.0003
2024-05-15 2024-03-31 13F MONTAUK RENEWABLES COM 61218C103 224,341 21,632 1 0.0003
2026-03-25 2023-12-31 13F/A-1 MONTAUK RENEWABLES COM 61218C103 202,709 144,846 250.33 1,806 242.69 0.0007
2024-02-15 2023-12-31 13F MONTAUK RENEWABLES COM 61218C103 202,709 144,846 2 0.0007
2026-03-26 2023-09-30 13F/A-1 MONTAUK RENEWABLES COM 61218C103 57,863 -3,521 -5.74 527 15.57 0.0003
2023-11-07 2023-09-30 13F MONTAUK RENEWABLES COM 61218C103 57,863 -3,521 1 0.0003
2026-03-30 2023-06-30 13F/A-2 MONTAUK RENEWABLES COM 61218C103 61,384 -77,974 -55.95 457 -58.39 0.0003
2023-09-20 2023-06-30 13F/A-1 MONTAUK RENEWABLES COM 61218C103 61,384 -77,974 0 0.0003
2023-08-03 2023-06-30 13F MONTAUK RENEWABLES COM 61218C103 61,384 -77,974 0 0.0003
2026-03-30 2023-03-31 13F/A-1 MONTAUK RENEWABLES COM 61218C103 139,358 12,186 9.58 1,097 -21.83 0.0005
2023-05-04 2023-03-31 13F MONTAUK RENEWABLES COM 61218C103 139,358 12,186 1 0.0005
2026-03-30 2022-12-31 13F/A-1 MONTAUK RENEWABLES COM 61218C103 127,172 74,248 140.29 1,403 52.06 0.0006
2023-02-13 2022-12-31 13F MONTAUK RENEWABLES COM 61218C103 127,172 74,248 1 0.0006
2022-11-03 2022-09-30 13F MONTAUK RENEWABLES COM 61218C103 52,924 40,950 341.99 922 668.33 0.0010
2022-08-12 2022-06-30 13F MONTAUK RENEWABLES COM 61218C103 11,974 -128,905 -91.50 120 -92.40 0.0001
2022-05-16 2022-03-31 13F MONTAUK RENEWABLES COM 61218C103 140,879 140,879 1,578 0.0012
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.