Antero Resources Corporation
US ˙ NYSE ˙ US03674X1063

SecurityAR / Antero Resources Corporation
InstitutionNorthern Trust Corp
Latest Disclosed Ownership2,618,205 shares
Latest Disclosed Value $ 111,116,620
Northern Trust Corp reports 11.03% increase in ownership of AR / Antero Resources Corporation

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 2,618,205 shares of Antero Resources Corporation (US:AR) valued at $111,116,620 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 2,358,165 shares of Antero Resources Corporation. This represents a change in shares of 11.03% during the quarter. The current value of the position is $97,135,406 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)
2026-05-14 2026-03-31 13F ANTERO RESOURCES COM 03674X106 2,618,205 260,040 11.03 111,117 36.74 0.0147
2026-02-17 2025-12-31 13F ANTERO RESOURCES COM 03674X106 2,358,165 -89,311 -3.65 81,262 -1.07 0.0104
2025-11-14 2025-09-30 13F ANTERO RESOURCES COM 03674X106 2,447,476 11,678 0.48 82,137 -16.28 0.0105
2025-08-13 2025-06-30 13F ANTERO RESOURCES COM 03674X106 2,435,798 25,039 1.04 98,114 0.64 0.0135
2025-05-13 2025-03-31 13F ANTERO RESOURCES COM 03674X106 2,410,759 -20,872 -0.86 97,491 14.39 0.0145
2025-02-14 2024-12-31 13F ANTERO RESOURCES COM 03674X106 2,431,631 447,944 22.58 85,229 49.96 0.0121
2024-11-13 2024-09-30 13F ANTERO RESOURCES COM 03674X106 1,983,687 -26,730 -1.33 56,833 -13.36 0.0093
2024-08-14 2024-06-30 13F ANTERO RESOURCES COM 03674X106 2,010,417 283,721 16.43 65,600 31.00 0.0111
2024-05-14 2024-03-31 13F ANTERO RESOURCES COM 03674X106 1,726,696 -241,674 -12.28 50,074 12.17 0.0087
2024-02-13 2023-12-31 13F ANTERO RESOURCES COM 03674X106 1,968,370 17,238 0.88 44,643 -9.85 0.0081
2023-11-13 2023-09-30 13F ANTERO RESOURCES COM 03674X106 1,951,132 -22,556 -1.14 49,520 8.94 0.0096
2023-08-11 2023-06-30 13F ANTERO RESOURCES COM 03674X106 1,973,688 -39,445 -1.96 45,454 -2.21 0.0087
2023-05-15 2023-03-31 13F ANTERO RESOURCES COM 03674X106 2,013,133 8,360 0.42 46,483 -25.18 0.0092
2023-02-13 2022-12-31 13F ANTERO RESOURCES COM 03674X106 2,004,773 822,093 69.51 62,128 72.06 0.0130
2022-11-14 2022-09-30 13F ANTERO RESOURCES COM 03674X106 1,182,680 -23,265 -1.93 36,107 -2.31 0.0082
2022-08-12 2022-06-30 13F ANTERO RESOURCES COM 03674X106 1,205,945 -2,109,669 -63.63 36,962 -63.49 0.0079
2022-05-13 2022-03-31 13F ANTERO RESOURCES COM 03674X106 3,315,614 -138,481 -4.01 101,225 67.46 0.0178
2022-02-08 2021-12-31 13F ANTERO RESOURCES COM 03674X106 3,454,095 -59,591 -1.70 60,446 -8.54 0.0099
2021-11-15 2021-09-30 13F ANTERO RESOURCES COM 03674X106 3,513,686 -93,579 -2.59 66,092 21.90 0.0117
2021-08-13 2021-06-30 13F ANTERO RESOURCES COM 03674X106 3,607,265 285,110 8.58 54,216 60.00 0.0096
2021-05-12 2021-03-31 13F ANTERO RESOURCES COM 03674X106 3,322,155 -792,772 -19.27 33,885 51.10 0.0063
2021-02-11 2020-12-31 13F ANTERO RESOURCES COM 03674X106 4,114,927 1,025,854 33.21 22,426 163.99 0.0044
2020-11-16 2020-09-30 13F ANTERO RESOURCES COM 03674X106 3,089,073 -44,425 -1.42 8,495 6.73 0.0019
2020-08-14 2020-06-30 13F ANTERO RESOURCES COM 03674X106 3,133,498 1,632,889 108.82 7,959 643.83 0.0019
2020-05-14 2020-03-31 13F ANTERO RESOURCES COM 03674X106 1,500,609 126,224 9.18 1,070 -72.68 0.0003
2020-02-14 2019-12-31 13F ANTERO RES COM 03674X106 1,374,385 52,337 3.96 3,916 -1.90 0.0009
2019-11-13 2019-09-30 13F ANTERO RES COM 03674X106 1,322,048 69,300 5.53 3,992 -42.38 0.0010
2019-08-13 2019-06-30 13F ANTERO RES COM 03674X106 1,252,748 40,982 3.38 6,928 -35.25 0.0016
2019-05-13 2019-03-31 13F ANTERO RES COM 03674X106 1,211,766 -258,358 -17.57 10,700 -22.49 0.0026
2019-02-12 2018-12-31 13F ANTERO RES COM 03674X106 1,470,124 147,335 11.14 13,804 -41.08 0.0039
2018-11-14 2018-09-30 13F ANTERO RES COM 03674X106 1,322,789 -16,927 -1.26 23,428 -18.09 0.0057
2018-09-18 2018-06-30 13F/A-1 ANTERO RES COM 03674X106 1,339,716 32,803 2.51 28,603 10.26 0.0073
2018-08-14 2018-06-30 13F ANTERO RES COM 03674X106 1,360,219 53,306 29,041
2018-05-09 2018-03-31 13F ANTERO RES COM 03674X106 1,306,913 -10,024 -0.76 25,942 3.68 0.0067
2018-02-14 2017-12-31 13F ANTERO RES COM 03674X106 1,316,937 14,469 1.11 25,021 -3.46 0.0063
2017-11-13 2017-09-30 13F ANTERO RES COM 03674X106 1,302,468 95,519 7.91 25,919 -0.62 0.0068
2017-08-11 2017-06-30 13F ANTERO RES COM 03674X106 1,206,949 184,235 18.01 26,081 11.80 0.0073
2017-05-12 2017-03-31 13F ANTERO RES COM 03674X106 1,022,714 100,115 10.85 23,329 6.92 0.0067
2017-02-13 2016-12-31 13F ANTERO RES COM 03674X106 922,599 88,240 10.58 21,820 -2.96 0.0067
2016-11-09 2016-09-30 13F ANTERO RES COM 03674X106 834,359 102,791 14.05 22,485 18.31 0.0070
2016-08-12 2016-06-30 13F ANTERO RES COM 03674X106 731,568 350,079 91.77 19,005 103.63 0.0062
2016-08-19 2016-03-31 13F/A-1 ANTERO RES COM 03674X106 381,489 20,502 5.68 9,333 18.60 0.0031
2016-05-13 2016-03-31 13F Antero Res COMM 03674X106 381,474 9,488
2016-02-12 2015-12-31 13F Antero Res COMM 03674X106 360,987 -38,333 -9.60 7,869 -6.88 0.0026
2015-11-12 2015-09-30 13F Antero Res COMM 03674X106 399,320 66,191 19.87 8,450 -26.14 0.0028
2015-08-13 2015-06-30 13F ANTERO RES COM 03674X106 333,129 24,890 8.07 11,440 5.08 0.0078
2015-05-14 2015-03-31 13F ANTERO RES COM 03674X106 308,239 2,322 0.76 10,887 -12.30 0.0033
2015-02-12 2014-12-31 13F ANTERO RES COM 03674X106 305,917 -54,736 -15.18 12,414 -37.29 0.0037
2014-11-13 2014-09-30 13F Antero Res COMM 03674X106 360,653 -34,590 -8.75 19,797 -23.68 0.0062
2014-08-14 2014-06-30 13F ANTERO RES com 03674X106 395,243 257,937 187.86 25,939 201.79 0.0081
2014-05-14 2014-03-31 13F ANTERO RES COM 03674X106 137,306 -7,272 -5.03 8,595 -6.29 0.0027
2014-02-21 2013-12-31 13F/A-1 ANTERO RES COM 03674X106 144,578 144,578 9,172 0.0029
2014-02-12 2013-12-31 13F ANTERO RES COM 03674X106 144,578 9,172 0.0029
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.