Antero Resources Corporation
US ˙ NYSE ˙ US03674X1063

SecurityAR / Antero Resources Corporation
InstitutionCitigroup Inc
Latest Disclosed Ownership186,274 shares
Latest Disclosed Value $ 7,905,468
Citigroup Inc ownership in AR / Antero Resources Corporation

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 186,274 shares of Antero Resources Corporation (US:AR) valued at $7,905,469 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 171,258 shares of Antero Resources Corporation. This represents a change in shares of 8.77% during the quarter. The current value of the position is $6,804,589 USD.

Citigroup Inc has a history of taking positions in derivatives of the underlying security (AR) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

AR / Antero Resources Corporation Historical Put/Call Ratio
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)
2026-05-11 2026-03-31 13F ANTERO RESOURCES COM 03674X106 186,274 15,016 8.77 7,905 33.96 0.0017
2026-02-13 2025-12-31 13F ANTERO RESOURCES COM 03674X106 171,258 1,468 0.86 5,902 3.56 0.0026
2025-11-10 2025-09-30 13F ANTERO RESOURCES COM 03674X106 169,790 47,237 38.54 5,698 15.44 0.0025
2025-08-11 2025-06-30 13F ANTERO RESOURCES COM 03674X106 122,553 -15,748 -11.39 4,936 -11.73 0.0024
2025-05-12 2025-03-31 13F ANTERO RESOURCES COM 03674X106 138,301 5,698 4.30 5,593 20.34 0.0029
2025-02-12 2024-12-31 13F ANTERO RESOURCES COM 03674X106 132,603 -45,450 -25.53 4,648 -8.90 0.0028
2024-11-12 2024-09-30 13F ANTERO RESOURCES COM 03674X106 178,053 24,455 15.92 5,101 1.80 0.0030
2024-08-12 2024-06-30 13F ANTERO RESOURCES COM 03674X106 153,598 -54,029 -26.02 5,012 -16.77 0.0032
2024-05-10 2024-03-31 13F ANTERO RESOURCES COM 03674X106 207,627 -464,364 -69.10 6,021 -60.49 0.0040
2024-02-09 2023-12-31 13F ANTERO RESOURCES COM 03674X106 671,991 497,188 284.43 15,241 243.55 0.0107
2023-12-06 2023-09-30 13F/A-1 ANTERO RESOURCES COM 03674X106 174,803 -17,687 -9.19 4,436 0.07 0.0033
2023-11-09 2023-09-30 13F ANTERO RESOURCES COM 03674X106 174,803 -17,687 4,436 0.0013
2023-08-10 2023-06-30 13F ANTERO RESOURCES COM 03674X106 192,490 -33,697 -14.90 4,433 -15.11 0.0029
2023-05-11 2023-03-31 13F ANTERO RESOURCES COM 03674X106 226,187 -25,042 -9.97 5,223 -32.92 0.0037
2023-02-09 2022-12-31 13F ANTERO RESOURCES COM 03674X106 251,229 87,028 53.00 7,786 55.30 0.0062
2022-11-10 2022-09-30 13F ANTERO RESOURCES COM 03674X106 164,201 -797,696 -82.93 5,013 -83.00 0.0036
2022-08-10 2022-06-30 13F ANTERO RESOURCES COM 03674X106 961,897 752,493 359.35 29,482 361.16 0.0219
2022-05-12 2022-03-31 13F ANTERO RESOURCES COM 03674X106 209,404 -146,455 -41.16 6,393 2.67 0.0039
2022-02-10 2021-12-31 13F ANTERO RESOURCES COM 03674X106 355,859 -198,282 -35.78 6,227 -40.26 0.0033
2021-11-10 2021-09-30 13F ANTERO RESOURCES COM 03674X106 554,141 -156,043 -21.97 10,423 -2.35 0.0062
2021-08-10 2021-06-30 13F ANTERO RESOURCES COM 03674X106 710,184 153,638 27.61 10,674 88.02 0.0064
2021-05-13 2021-03-31 13F ANTERO RESOURCES COM 03674X106 556,546 357,678 179.86 5,677 423.71 0.0037
2021-02-11 2020-12-31 13F ANTERO RESOURCES COM 03674X106 198,868 -502,130 -71.63 1,084 -43.78 0.0006
2020-11-12 2020-09-30 13F ANTERO RESOURCES COM 03674X106 700,998 410,012 140.90 1,928 160.89 0.0013
2020-08-12 2020-06-30 13F ANTERO RESOURCES COM 03674X106 290,986 -282,250 -49.24 739 81.13 0.0006
2020-05-12 2020-03-31 13F ANTERO RESOURCES COM 03674X106 573,236 -262,032 -31.37 408 -82.86 0.0004
2020-02-12 2019-12-31 13F ANTERO RES COM 03674X106 835,268 -696,407 -45.47 2,381 -48.53 0.0017
2019-11-08 2019-09-30 13F ANTERO RES COM 03674X106 1,531,675 659,694 75.65 4,626 -4.06 0.0037
2019-08-12 2019-06-30 13F ANTERO RES COM 03674X106 871,981 661,571 314.42 4,822 159.53 0.0039
2019-05-13 2019-03-31 13F ANTERO RES COM 03674X106 210,410 -886,368 -80.82 1,858 -81.96 0.0018
2019-02-12 2018-12-31 13F ANTERO RES COM 03674X106 1,096,778 1,038,604 1,785.34 10,299 899.90 0.0104
2018-11-13 2018-09-30 13F ANTERO RES COM 03674X106 58,174 -45,139 -43.69 1,030 -53.29 0.0009
2018-08-10 2018-06-30 13F ANTERO RES COM 03674X106 103,313 54,662 112.36 2,205 128.26 0.0020
2018-05-11 2018-03-31 13F ANTERO RES COM 03674X106 48,651 5,075 11.65 966 16.67 0.0008
2018-02-12 2017-12-31 13F ANTERO RES COM 03674X106 43,576 -30,955 -41.53 828 -44.20 0.0007
2017-11-13 2017-09-30 13F ANTERO RES COM 03674X106 74,531 -120,908 -61.86 1,484 -64.87 0.0012
2017-08-11 2017-06-30 13F ANTERO RES COM 03674X106 195,439 189,996 3,490.65 4,224 3,279.20 0.0038
2017-05-12 2017-03-31 13F ANTERO RES COM 03674X106 5,443 -38,672 -87.66 125 -88.02 0.0001
2017-02-10 2016-12-31 13F ANTERO RES COM 03674X106 44,115 6,154 16.21 1,043 1.96 0.0009
2016-11-10 2016-09-30 13F ANTERO RES COM 03674X106 37,961 -81,369 -68.19 1,023 -67.01 0.0010
2016-08-12 2016-06-30 13F ANTERO RES COM 03674X106 119,330 -40,470 -25.33 3,101 -21.99 0.0032
2016-05-13 2016-03-31 13F ANTERO RES COM 03674X106 159,800 112,968 241.22 3,975 289.32 0.0045
2016-02-12 2015-12-31 13F ANTERO RES COM 03674X106 46,832 44,952 2,391.06 1,021 2,452.50 0.0010
2015-11-13 2015-09-30 13F ANTERO RES COM 03674X106 1,880 -4,386 -70.00 40 -81.40 0.0000
2015-08-13 2015-06-30 13F ANTERO RES COM 03674X106 6,266 -22,657 -78.34 215 -78.94 0.0002
2015-05-14 2015-03-31 13F ANTERO RES COM 03674X106 28,923 27,000 1,404.06 1,021 1,208.97 0.0010
2015-02-17 2014-12-31 13F ANTERO RES COM 03674X106 1,923 -3,853 -66.71 78 -75.39 0.0001
2014-11-14 2014-09-30 13F ANTERO RES COM 03674X106 5,776 -642 -10.00 317 -24.52 0.0003
2014-08-14 2014-06-30 13F ANTERO RES COM 03674X106 6,418 2,806 77.69 420 85.02 0.0004
2014-05-15 2014-03-31 13F ANTERO RES COM 03674X106 3,612 419 13.12 227 11.82 0.0002
2014-02-14 2013-12-31 13F ANTERO RES COM 03674X106 3,193 3,193 203 0.0002
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2025-11-10 2025-09-30 13F ANTERO RESOURCES COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-11 2025-06-30 13F ANTERO RESOURCES COM Call 54,400 2,191 n/a n/a n/a
2021-05-13 2021-03-31 13F ANTERO RESOURCES COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-11 2020-12-31 13F ANTERO RESOURCES COM Call 147,200 -22.89 802 52.76 n/a n/a n/a
2020-11-12 2020-09-30 13F ANTERO RESOURCES COM Call 190,900 5.12 525 13.88 n/a n/a n/a
2020-08-12 2020-06-30 13F ANTERO RESOURCES COM Call 181,600 283.12 461 1,255.88 n/a n/a n/a
2020-05-12 2020-03-31 13F ANTERO RESOURCES COM Call 47,400 -29.99 34 -82.38 n/a n/a n/a
2020-02-12 2019-12-31 13F ANTERO RES COM Call 67,700 -48.04 193 -51.02 n/a n/a n/a
2019-11-08 2019-09-30 13F ANTERO RES COM Call 130,300 350.87 394 146.25 n/a n/a n/a
2019-08-12 2019-06-30 13F ANTERO RES COM Call 28,900 18.44 160 -25.58 n/a n/a n/a
2019-05-13 2019-03-31 13F ANTERO RES COM Call 24,400 -23.27 215 -28.09 n/a n/a n/a
2019-02-12 2018-12-31 13F ANTERO RES COM Call 31,800 21.84 299 -35.28 n/a n/a n/a
2018-11-13 2018-09-30 13F ANTERO RES COM Call 26,100 113.93 462 77.69 n/a n/a n/a
2018-08-10 2018-06-30 13F ANTERO RES COM Call 12,200 41.86 260 52.05 n/a n/a n/a
2018-05-11 2018-03-31 13F ANTERO RES COM Call 8,600 -25.86 171 -22.27 n/a n/a n/a
2018-02-12 2017-12-31 13F ANTERO RES COM Call 11,600 480.00 220 450.00 n/a n/a n/a
2017-11-13 2017-09-30 13F ANTERO RES COM Call 2,000 -13.04 40 -20.00 n/a n/a n/a
2017-08-11 2017-06-30 13F ANTERO RES COM Call 2,300 64.29 50 56.25 n/a n/a n/a
2017-05-12 2017-03-31 13F ANTERO RES COM Call 1,400 -30.00 32 -31.91 n/a n/a n/a
2017-02-10 2016-12-31 13F ANTERO RES COM Call 2,000 47 n/a n/a n/a
2016-08-12 2016-06-30 13F ANTERO RES COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2016-05-13 2016-03-31 13F ANTERO RES COM Call 250,000 0.00 6,218 14.09 n/a n/a n/a
2016-02-12 2015-12-31 13F ANTERO RES COM Call 250,000 5,450 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2021-05-13 2021-03-31 13F ANTERO RESOURCES COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-11 2020-12-31 13F ANTERO RESOURCES COM Put 89,100 -22.12 486 54.29 n/a n/a n/a
2020-11-12 2020-09-30 13F ANTERO RESOURCES COM Put 114,400 1.96 315 10.53 n/a n/a n/a
2020-08-12 2020-06-30 13F ANTERO RESOURCES COM Put 112,200 31.54 285 367.21 n/a n/a n/a
2020-05-12 2020-03-31 13F ANTERO RESOURCES COM Put 85,300 1.55 61 -74.48 n/a n/a n/a
2020-02-12 2019-12-31 13F ANTERO RES COM Put 84,000 -51.95 239 -54.73 n/a n/a n/a
2019-11-08 2019-09-30 13F ANTERO RES COM Put 174,800 127.31 528 24.24 n/a n/a n/a
2019-08-12 2019-06-30 13F ANTERO RES COM Put 76,900 199.22 425 87.22 n/a n/a n/a
2019-05-13 2019-03-31 13F ANTERO RES COM Put 25,700 -20.19 227 -24.83 n/a n/a n/a
2019-02-12 2018-12-31 13F ANTERO RES COM Put 32,200 32.51 302 -29.77 n/a n/a n/a
2018-11-13 2018-09-30 13F ANTERO RES COM Put 24,300 -21.36 430 -34.85 n/a n/a n/a
2018-08-10 2018-06-30 13F ANTERO RES COM Put 30,900 171.05 660 192.04 n/a n/a n/a
2018-05-11 2018-03-31 13F ANTERO RES COM Put 11,400 -5.00 226 -0.88 n/a n/a n/a
2018-02-12 2017-12-31 13F ANTERO RES COM Put 12,000 -51.02 228 -53.28 n/a n/a n/a
2017-11-13 2017-09-30 13F ANTERO RES COM Put 24,500 62.25 488 49.69 n/a n/a n/a
2017-08-11 2017-06-30 13F ANTERO RES COM Put 15,100 331.43 326 307.50 n/a n/a n/a
2017-05-12 2017-03-31 13F ANTERO RES COM Put 3,500 600.00 80 566.67 n/a n/a n/a
2017-02-10 2016-12-31 13F ANTERO RES COM Put 500 12 n/a n/a n/a
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.