Antero Resources Corporation
US ˙ NYSE ˙ US03674X1063

SecurityAR / Antero Resources Corporation
InstitutionStifel Financial Corp
Latest Disclosed Ownership193,243 shares
Latest Disclosed Value $ 8,201,241
Stifel Financial Corp reports 8.69% decrease in ownership of AR / Antero Resources Corporation

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 193,243 shares of Antero Resources Corporation (US:AR) valued at $8,201,233 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 211,643 shares of Antero Resources Corporation. This represents a change in shares of -8.69% during the quarter. The current value of the position is $7,169,315 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 ANTERO RESOURCES COM 03674X106 193,243 -18,400 -8.69 8,201 12.45 0.0075
2026-02-13 2025-12-31 13F ANTERO RESOURCES COM 03674X106 211,643 87,092 69.92 7,293 74.52 0.0066
2025-11-12 2025-09-30 13F ANTERO RESOURCES COM 03674X106 124,551 10,907 9.60 4,180 -8.70 0.0038
2025-08-14 2025-06-30 13F ANTERO RESOURCES COM 03674X106 113,644 27,333 31.67 4,578 31.15 0.0045
2025-05-14 2025-03-31 13F ANTERO RESOURCES COM 03674X106 86,311 1,781 2.11 3,490 17.83 0.0037
2025-02-13 2024-12-31 13F ANTERO RESOURCES COM 03674X106 84,530 520 0.62 2,963 23.11 0.0031
2024-11-14 2024-09-30 13F ANTERO RESOURCES COM 03674X106 84,010 69 0.08 2,407 -12.16 0.0025
2024-08-13 2024-06-30 13F ANTERO RESOURCES COM 03674X106 83,941 825 0.99 2,739 13.65 0.0031
2024-05-14 2024-03-31 13F ANTERO RESOURCES COM 03674X106 83,116 -561,095 -87.10 2,410 -83.50 0.0027
2024-02-12 2023-12-31 13F ANTERO RESOURCES COM 03674X106 644,211 -2,874 -0.44 14,611 -11.04 0.0184
2023-11-13 2023-09-30 13F ANTERO RESOURCES COM 03674X106 647,085 -4,224 -0.65 16,423 9.49 0.0231
2023-08-14 2023-06-30 13F ANTERO RESOURCES COM 03674X106 651,309 142,119 27.91 15,000 27.58 0.0205
2023-05-12 2023-03-31 13F ANTERO RESOURCES COM 03674X106 509,190 421,584 481.23 11,757 333.20 0.0169
2023-02-13 2022-12-31 13F ANTERO RESOURCES COM 03674X106 87,606 -22,379 -20.35 2,715 -19.18 0.0041
2022-11-14 2022-09-30 13F ANTERO RESOURCES COM 03674X106 109,985 -92,776 -45.76 3,358 -45.97 0.0055
2022-08-15 2022-06-30 13F ANTERO RESOURCES COM 03674X106 202,761 -12,984 -6.02 6,215 -5.65 0.0097
2022-05-13 2022-03-31 13F ANTERO RESOURCES COM 03674X106 215,745 -116,939 -35.15 6,587 13.14 0.0090
2022-02-14 2021-12-31 13F ANTERO RESOURCES COM 03674X106 332,684 764 0.23 5,822 -6.74 0.0077
2021-11-15 2021-09-30 13F ANTERO RESOURCES COM 03674X106 331,920 -5,509 -1.63 6,243 23.09 0.0092
2021-08-13 2021-06-30 13F ANTERO RESOURCES COM 03674X106 337,429 -7,965 -2.31 5,072 43.97 0.0076
2021-05-14 2021-03-31 13F ANTERO RESOURCES COM 03674X106 345,394 -5,839 -1.66 3,523 84.06 0.0058
2021-02-12 2020-12-31 13F ANTERO RESOURCES COM 03674X106 351,233 -127,640 -26.65 1,914 45.33 0.0034
2020-11-16 2020-09-30 13F ANTERO RESOURCES COM 03674X106 478,873 -18,201 -3.66 1,317 4.28 0.0027
2020-08-14 2020-06-30 13F ANTERO RESOURCES COM 03674X106 497,074 -11,342 -2.23 1,263 285.06 0.0029
2020-05-14 2020-03-31 13F ANTERO RESOURCES COM 03674X106 508,416 -253,350 -33.26 328 -84.81 0.0009
2020-02-13 2019-12-31 13F ANTERO RES COM 03674X106 761,766 -188,106 -19.80 2,160 -24.58 0.0045
2019-11-19 2019-09-30 13F/A-1 ANTERO RES COM 03674X106 949,872 -14,434 -1.50 2,864 -46.28 0.0073
2019-11-13 2019-09-30 13F ANTERO RES COM 03674X106 950,772 -13,534 2,867 1,607.0972
2019-08-14 2019-06-30 13F ANTERO RES COM 03674X106 964,306 -22,962 -2.33 5,331 -38.84 0.0137
2019-05-14 2019-03-31 13F ANTERO RES COM 03674X106 987,268 206,576 26.46 8,717 18.81 0.0246
2019-02-13 2018-12-31 13F ANTERO RES COM 03674X106 780,692 22,672 2.99 7,337 -45.34 0.0237
2018-11-13 2018-09-30 13F ANTERO RES COM 03674X106 758,020 210,404 38.42 13,423 14.81 0.0385
2018-08-14 2018-06-30 13F ANTERO RES COM 03674X106 547,616 24,568 4.70 11,691 12.60 0.0359
2018-05-11 2018-03-31 13F ANTERO RES COM 03674X106 523,048 -147,874 -22.04 10,383 -18.67 0.0328
2018-02-14 2017-12-31 13F ANTERO RES COM 03674X106 670,922 39,453 6.25 12,767 1.65 0.0405
2017-11-13 2017-09-30 13F ANTERO RES COM 03674X106 631,469 -13,211 -2.05 12,560 -9.91 0.0436
2017-08-14 2017-06-30 13F ANTERO RES COM 03674X106 644,680 615,318 2,095.63 13,942 1,987.13 0.0518
2017-05-10 2017-03-31 13F ANTERO RES COM 03674X106 29,362 6,719 29.67 668 24.63 0.0026
2017-02-16 2016-12-31 13F ANTERO RES COM 03674X106 22,643 -1,489 -6.17 536 -17.16 0.0023
2016-11-15 2016-09-30 13F ANTERO RES COM 03674X106 24,132 -1,569 -6.10 647 -3.14 0.0029
2016-08-17 2016-06-30 13F ANTERO RES COM 03674X106 25,701 -200 -0.77 668 3.73 0.0031
2016-05-16 2016-03-31 13F ANTERO RES COM 03674X106 25,901 25,901 0.00 644 0.0034
2016-02-26 2015-12-31 13F/A-1 ANTERO RES COM 03674X106 0 -11,223 -100.00 0 -100.00
2015-11-16 2015-09-30 13F ANTERO RES COM 03674X106 11,223 -4,305 -27.72 237 -55.53 0.0013
2015-08-17 2015-06-30 13F/A-1 ANTERO RES COM 03674X106 15,528 7,710 98.62 533 93.12 0.0028
2015-08-17 2015-06-30 13F ANTERO RES COM 03674X106 15,528 533
2015-05-14 2015-03-31 13F ANTERO RES COM 03674X106 7,818 1,199 18.11 276 2.60 0.0015
2015-02-13 2014-12-31 13F ANTERO RES COM 03674X106 6,619 6,619 269 0.0015
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.