Matador Resources Company
US ˙ NYSE ˙ US5764852050

SecurityMTDR / Matador Resources Company
InstitutionRhumbline Advisers
Latest Disclosed Ownership308,412 shares
Latest Disclosed Value $ 19,485,425
Rhumbline Advisers reports 0.52% decrease in ownership of MTDR / Matador Resources Company

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 308,412 shares of Matador Resources Company (US:MTDR) valued at $19,485,470 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 310,039 shares of Matador Resources Company. This represents a change in shares of -0.52% during the quarter. The current value of the position is $16,521,631 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 MATADOR RES CO COM COM 576485205 308,412 -1,627 -0.52 19,485 48.08 0.0167
2026-02-13 2025-12-31 13F MATADOR RES CO COM COM 576485205 310,039 4,717 1.54 13,158 -4.08 0.0106
2025-11-06 2025-09-30 13F MATADOR RES CO COM COM 576485205 305,322 -943 -0.31 13,718 -6.13 0.0110
2025-08-12 2025-06-30 13F MATADOR RES CO COM COM 576485205 306,265 -22,694 -6.90 14,615 -13.04 0.0125
2025-05-29 2025-03-31 13F/A-1 MATADOR RES CO COM COM 576485205 328,959 19,937 6.45 16,806 -3.33 0.0157
2025-04-08 2025-03-31 13F MATADOR RES CO COM COM 576485205 328,959 19,937 16,806 0.0157
2025-05-29 2024-12-31 13F/A-1 MATADOR RES CO COM COM 576485205 309,022 5,716 1.88 17,386 15.99 0.0156
2025-01-30 2024-12-31 13F MATADOR RES CO COM COM 576485205 309,022 5,716 17,386 0.0156
2024-11-12 2024-09-30 13F MATADOR RES CO COM COM 576485205 303,306 -9,264 -2.96 14,989 -19.54 0.0135
2024-08-01 2024-06-30 13F MATADOR RES CO COM COM 576485205 312,570 -54,834 -14.92 18,629 -24.06 0.0175
2024-05-09 2024-03-31 13F MATADOR RES CO COM COM 576485205 367,404 3,788 1.04 24,532 18.65 0.0236
2024-02-08 2023-12-31 13F MATADOR RES CO COM COM 576485205 363,616 -16,755 -4.40 20,675 -8.61 0.0217
2023-11-09 2023-09-30 13F MATADOR RES CO COM COM 576485205 380,371 -828 -0.22 22,624 13.44 0.0263
2023-08-08 2023-06-30 13F MATADOR RES CO COM COM 576485205 381,199 27,382 7.74 19,944 124,550.00 0.0223
2023-05-11 2023-03-31 13F MATADOR RES CO COM COM 576485205 353,817 1,371 0.39 17 -99.92 0.0208
2023-02-14 2022-12-31 13F MATADOR RES CO COM COM 576485205 352,446 9,490 2.77 20,174 20.25 0.0271
2022-11-10 2022-09-30 13F MATADOR RES CO COM COM 576485205 342,956 13,716 4.17 16,777 9.37 0.0250
2022-08-11 2022-06-30 13F MATADOR RES CO COM COM 576485205 329,240 62,250 23.32 15,339 8.44 0.0224
2022-05-12 2022-03-31 13F MATADOR RES CO COM COM 576485205 266,990 15,929 6.34 14,145 52.61 0.0182
2022-02-10 2021-12-31 13F MATADOR RES CO COM COM 576485205 251,061 -13,447 -5.08 9,269 -7.88 0.0114
2021-11-12 2021-09-30 13F MATADOR RES CO COM COM 576485205 264,508 -46,789 -15.03 10,062 -10.24 0.0136
2021-08-05 2021-06-30 13F MATADOR RES CO COM COM 576485205 311,297 -52,156 -14.35 11,210 31.53 0.0147
2021-05-06 2021-03-31 13F MATADOR RES CO COM COM 576485205 363,453 6,404 1.79 8,523 97.93 0.0116
2021-02-10 2020-12-31 13F MATADOR RES CO COM COM 576485205 357,049 14,501 4.23 4,306 52.21 0.0059
2020-11-12 2020-09-30 13F MATADOR RES CO COM COM 576485205 342,548 -63,826 -15.71 2,829 -18.09 0.0044
2020-08-13 2020-06-30 13F MATADOR RES CO COM COM 576485205 406,374 -7,188 -1.74 3,454 236.65 0.0058
2020-05-06 2020-03-31 13F MATADOR RES CO COM COM 576485205 413,562 27,308 7.07 1,026 -85.22 0.0022
2020-02-05 2019-12-31 13F MATADOR RES CO COM COM 576485205 386,254 17,287 4.69 6,941 13.81 0.0116
2019-10-23 2019-09-30 13F MATADOR RES CO COM COM 576485205 368,967 17,606 5.01 6,099 -12.68 0.0111
2019-08-14 2019-06-30 13F MATADOR RES CO COM COM 576485205 351,361 27,605 8.53 6,985 11.62 0.0131
2019-05-01 2019-03-31 13F MATADOR RES CO COM COM 576485205 323,756 5,934 1.87 6,258 26.78 0.0121
2019-01-31 2018-12-31 13F MATADOR RES CO COM COM 576485205 317,822 129,395 68.67 4,936 -20.75 0.0107
2018-11-07 2018-09-30 13F MATADOR RES CO COM COM 576485205 188,427 -777 -0.41 6,228 9.53 0.0120
2018-08-06 2018-06-30 13F MATADOR RES CO COM COM 576485205 189,204 8,472 4.69 5,686 5.18 0.0115
2018-05-02 2018-03-31 13F MATADOR RES CO COM COM 576485205 180,732 -7,925 -4.20 5,406 -7.95 0.0113
2018-02-09 2017-12-31 13F MATADOR RES CO COM COM 576485205 188,657 -6,039 -3.10 5,873 11.10 0.0119
2017-11-06 2017-09-30 13F MATADOR RES CO COM COM 576485205 194,696 12,753 7.01 5,286 35.96 0.0115
2017-08-02 2017-06-30 13F MATADOR RES CO COM COM 576485205 181,943 78,367 75.66 3,888 57.79 0.0089
2017-05-02 2017-03-31 13F MATADOR RES CO COM COM 576485205 103,576 10,134 10.85 2,464 2.37 0.0058
2017-01-27 2016-12-31 13F MATADOR RES CO COM COM 576485205 93,442 6,686 7.71 2,407 13.97 0.0061
2016-11-08 2016-09-30 13F MATADOR RES CO COM COM 576485205 86,756 2,285 2.71 2,112 26.24 0.0058
2016-08-11 2016-06-30 13F MATADOR RES CO COM COM 576485205 84,471 -2,989 -3.42 1,673 0.90 0.0050
2016-05-02 2016-03-31 13F MATADOR RESOURCES COM COM 576485205 87,460 5,790 7.09 1,658 2.66 0.0051
2016-02-03 2015-12-31 13F MATADOR RESOURCES COM COM 576485205 81,670 2,900 3.68 1,615 -1.16 0.0052
2015-11-04 2015-09-30 13F MATADOR RESOURCES COM COM 576485205 78,770 1,162 1.50 1,634 -15.77 0.0056
2015-08-04 2015-06-30 13F MATADOR RESOURCES COM COM 576485205 77,608 -3,585 -4.42 1,940 8.99 0.0062
2015-05-12 2015-03-31 13F MATADOR RESOURCES COM COM 576485205 81,193 5,420 7.15 1,780 16.11 0.0051
2015-02-06 2014-12-31 13F MATADOR RESOURCES COM COM 576485205 75,773 430 0.57 1,533 -21.30 0.0045
2014-11-12 2014-09-30 13F MATADOR RESOURCES COM COM 576485205 75,343 10 0.01 1,948 -11.70 0.0059
2014-08-06 2014-06-30 13F MATADOR RESOURCES COM COM 576485205 75,333 2,301 3.15 2,206 23.31 0.0065
2014-05-06 2014-03-31 13F MATADOR RESOURCES COM COM 576485205 73,032 -2,185 -2.90 1,789 27.60 0.0053
2014-02-03 2013-12-31 13F MATADOR RESOURCES COM COM 576485205 75,217 5,580 8.01 1,402 23.31 0.0041
2013-11-05 2013-09-30 13F MATADOR RESOURCES COM COM 576485205 69,637 1,713 2.52 1,137 39.68 0.0035
2013-08-07 2013-06-30 13F MATADOR RESOURCES COM COM 576485205 67,924 67,924 814 0.0026
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.