Matador Resources Company
US ˙ NYSE ˙ US5764852050

SecurityMTDR / Matador Resources Company
InstitutionSei Investments Co
Latest Disclosed Ownership191,621 shares
Latest Disclosed Value $ 8,131,604
Sei Investments Co reports 0.43% increase in ownership of MTDR / Matador Resources Company

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 191,621 shares of Matador Resources Company (US:MTDR) valued at $8,132,395 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 190,799 shares of Matador Resources Company. This represents a change in shares of 0.43% during the quarter. The current value of the position is $10,834,251 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 MATADOR RES COM 576485205 191,621 822 0.43 8,132 -5.11 0.0080
2025-11-13 2025-09-30 13F MATADOR RES COM 576485205 190,799 8,244 4.52 8,569 -1.62 0.0092
2025-08-14 2025-06-30 13F MATADOR RES COM 576485205 182,555 40,871 28.85 8,711 20.34 0.0101
2025-05-14 2025-03-31 13F/A-1 MATADOR RES COM 576485205 141,684 10,548 8.04 7,239 -1.90 0.0093
2025-05-13 2025-03-31 13F MATADOR RES COM 576485205 136,007 4,871 7,375 0.0080
2025-02-11 2024-12-31 13F MATADOR RES COM 576485205 131,136 39,550 43.18 7,378 63.01 0.0095
2024-11-12 2024-09-30 13F MATADOR RES COM 576485205 91,586 -6,995 -7.10 4,526 -22.95 0.0059
2024-08-13 2024-06-30 13F MATADOR RES COM 576485205 98,581 28,517 40.70 5,875 25.57 0.0083
2024-05-07 2024-03-31 13F MATADOR RES COM 576485205 70,064 -3,472 -4.72 4,678 11.89 0.0069
2024-02-14 2023-12-31 13F MATADOR RES COM 576485205 73,536 -86,375 -54.01 4,181 -56.04 0.0067
2023-11-14 2023-09-30 13F MATADOR RES COM 576485205 159,911 -2,026 -1.25 9,511 12.25 0.0171
2023-08-11 2023-06-30 13F MATADOR RES COM 576485205 161,937 -28,687 -15.05 8,472 -6.73 0.0148
2023-05-12 2023-03-31 13F MATADOR RES COM 576485205 190,624 91,098 91.53 9,083 59.46 0.0169
2023-02-10 2022-12-31 13F MATADOR RES COM 576485205 99,526 -48,697 -32.85 5,697 -21.46 0.0127
2022-11-14 2022-09-30 13F MATADOR RES COM 576485205 148,223 38,088 34.58 7,252 41.70 0.0162
2022-08-15 2022-06-30 13F MATADOR RES COM 576485205 110,135 34,922 46.43 5,118 28.46 0.0111
2022-05-13 2022-03-31 13F MATADOR RES COM 576485205 75,213 41,735 124.66 3,984 222.59 0.0080
2022-02-14 2021-12-31 13F MATADOR RES COM 576485205 33,478 5,286 18.75 1,235 15.21 0.0023
2021-11-12 2021-09-30 13F MATADOR RES COM 576485205 28,192 28,192 1,072 0.0022
2021-08-06 2021-06-30 13F MATADOR RES COM 576485205 0 -21,048 -100.00 0 -100.00
2021-05-12 2021-03-31 13F MATADOR RES COM 576485205 21,048 0 0.00 254 0.00 0.0006
2021-02-08 2020-12-31 13F MATADOR RES COM 576485205 21,048 -72,252 -77.44 254 -67.01 0.0007
2020-12-04 2020-09-30 13F/A-1 MATADOR RES COM 576485205 93,300 9,733 11.65 770 -46.90 0.0022
2020-11-06 2020-09-30 13F MATADOR RES COM 576485205 98,355 14,788 812 1,955.1155
2020-08-11 2020-06-30 13F MATADOR RES COM 576485205 83,567 83,567 1,450 0.0045
2020-05-14 2020-03-31 13F MATADOR RES COM 576485205 0 -80,588 -100.00 0 -100.00
2020-02-06 2019-12-31 13F MATADOR RES COM 576485205 80,588 -308 -0.38 1,454 8.10 0.0043
2019-11-12 2019-09-30 13F MATADOR RES COM 576485205 80,896 -10,098 -11.10 1,345 -25.81 0.0034
2019-08-14 2019-06-30 13F MATADOR RES COM 576485205 90,994 4,840 5.62 1,813 8.24 0.0059
2019-05-15 2019-03-31 13F MATADOR RES COM 576485205 86,154 -7,207 -7.72 1,675 -44.99 0.0056
2019-02-13 2018-12-31 13F MATADOR RES COM 576485205 93,361 413 0.44 3,045 -0.94 0.0108
2018-11-08 2018-09-30 13F MATADOR RES COM 576485205 92,948 -12,833 -12.13 3,074 -3.27 0.0111
2018-08-03 2018-06-30 13F MATADOR RES COM 576485205 105,781 17,090 19.27 3,178 19.83 0.0108
2018-05-11 2018-03-31 13F MATADOR RES COM 576485205 88,691 -53,755 -37.74 2,652 -40.19 0.0102
2018-02-08 2017-12-31 13F MATADOR RES COM 576485205 142,446 5,948 4.36 4,434 19.61 0.0154
2017-11-06 2017-09-30 13F MATADOR RES COM 576485205 136,498 4,497 3.41 3,707 31.41 0.0132
2017-07-31 2017-06-30 13F MATADOR RES COM 576485205 132,001 -15,831 -10.71 2,821 -19.79 0.0112
2017-05-05 2017-03-31 13F MATADOR RES COM 576485205 147,832 83,404 129.45 3,517 111.87 0.0154
2017-02-02 2016-12-31 13F MATADOR RES COM 576485205 64,428 62,199 2,790.44 1,660 2,974.07 0.0080
2016-11-04 2016-09-30 13F MATADOR RES COM 576485205 2,229 -330 -12.90 54 5.88 0.0003
2016-08-11 2016-06-30 13F MATADOR RES COM 576485205 2,559 5 0.20 51 6.25 0.0003
2016-05-10 2016-03-31 13F/A-1 MATADOR RES COM 576485205 2,554 0 0.00 48 -4.00 0.0003
2016-02-03 2015-12-31 13F MATADOR RES COM 576485205 2,554 -49,821 -95.12 50 -95.40 0.0003
2015-11-02 2015-09-30 13F/A-1 MATADOR RES COM 576485205 52,375 35,378 208.14 1,086 156.13 0.0100
2015-10-30 2015-09-30 13F MATADOR RES COM 576485205 52,375 1,088
2015-08-07 2015-06-30 13F/A-1 MATADOR RES COM 576485205 16,997 16,997 0.00 424 0.0038
2015-08-04 2015-06-30 13F MATADOR RES COM 576485205 16,997 16,997 424 0.0038
2015-05-01 2015-03-31 13F MATADOR RES COM 576485205 0 -60 -100.00 0 -100.00
2015-02-10 2014-12-31 13F MATADOR RES COM 576485205 60 60 1 0.0000
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.