Exhibit 99.1

Antero Midstream Announces First Quarter 2021 Financial and Operational Results

Denver, Colorado, April 28, 2021—Antero Midstream Corporation (NYSE: AM) (“Antero Midstream” or the “Company”) today announced its first quarter 2021 financial and operational results. The relevant consolidated financial statements are included in Antero Midstream’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2021.

First Quarter 2021 Earnings Highlights:

Paul Rady, Chairman and CEO said, “Antero Midstream delivered another strong operational quarter focused on cost reductions and capital discipline. This allowed us to generate $146 million of Free Cash Flow before dividends and for the second time in company history, generate Free Cash Flow after dividends. We believe this capital discipline and the ability to internally finance both our capital budget and return of capital to shareholders will serve Antero Midstream well going forward.”

Mr. Rady further added, “Antero Midstream’s primary customer, Antero Resources, made significant strides in improving its financial strength, generating over $400 million of Free Cash Flow during the first quarter. As a result of Antero Resources’ Free Cash Flow profile, Antero Resources’ leverage has significantly improved to 2.0x as of March 31, 2021. This improvement in financial strength at Antero Resources directly benefits Antero Midstream.”

For a discussion of the non-GAAP financial measures including Adjusted Net Income, Adjusted EBITDA, Free Cash Flow and Net Debt please see “Non-GAAP Financial Measures.”

First Quarter 2021 Financial Results

Low pressure gathering volumes for the first quarter of 2021 averaged 2,853 MMcf/d, a 5% increase as compared to the prior year quarter. Compression volumes for the first quarter of 2021 averaged 2,706 MMcf/d, an 8% increase as compared to the first quarter of 2020. High pressure gathering volumes for the first quarter of 2021 averaged 2,812 MMcf/d, a 4% increase compared to the first quarter of 2020. Fresh water delivery volumes averaged 104 MBbl/d during the quarter, a 43% decrease compared to the first quarter of 2020, due to a decrease in completion activities by Antero Resources.

Gross processing volumes from the Company’s processing and fractionation joint venture with MPLX (“Joint Venture”) averaged 1,428 MMcf/d for the first quarter of 2021, an 8% increase compared to the prior year quarter. Joint Venture processing capacity was over 100% utilized during the quarter based on nameplate processing capacity of 1.4 Bcf/d. Gross Joint Venture fractionation volumes averaged 38 MBbl/d, a 15% increase compared to the prior year quarter. Joint Venture fractionation capacity was 95% utilized during the quarter relative to fractionation capacity of 40 MBbl/d.

For the three months ended March 31, 2021, revenues were $224 million, comprised of $185 million from the Gathering and Processing segment and $57 million from the Water Handling segment, net of $18 million of amortization of customer relationships. Water Handling revenues included $19 million from wastewater handling and high rate water transfer services.

Direct operating expenses for the Gathering and Processing and Water Handling segments were $17 million and $22 million, respectively, for a total of $39 million, compared to $49 million in total direct operating expenses in the prior year quarter. Water Handling operating expenses included $18 million from wastewater handling and high rate water transfer services. The decrease in direct operating expenses was driven primarily by lower costs associated with flowback and produced water due to Antero Midstream’s blending operations. General and administrative expenses excluding equity-based compensation were $14 million during the first quarter of 2021. Total operating expenses during the first quarter of 2021 included $4 million of equity compensation expense, a $1 million impairment, a $4 million loss on asset sale and $27 million of depreciation.

Net income was $83 million, or $0.17 per share. Net income adjusted for amortization of customer relationships, impairment expense and loss on asset sale, or Adjusted Net Income, was $101 million. Adjusted Net Income per share was $0.21 per share, a 9% decrease compared to the prior year quarter.

The following table reconciles Net Income (Loss) to Adjusted Net Income:

Adjusted EBITDA was $219 million, a 1% increase compared to the prior year quarter. Interest expense was $43 million, a 14% increase compared to the prior year quarter, driven by the issuance of the senior notes due 2026 that displaced lower cost borrowings on Antero Midstream’s credit facility. Capital expenditures were $30 million, a 64% decrease compared to the prior year quarter. Free Cash Flow before dividends was $146 million, a 51% increase compared to the prior year quarter and Free Cash Flow after dividends was $39 million compared to a deficit of $50 million in the prior year quarter.

The following table reconciles Net Income (Loss) to Adjusted EBITDA and Free Cash Flow before and after dividends:

The following table reconciles net cash provided by operating activities to Free Cash Flow before dividends:

First Quarter 2021 Operating Update

Gathering and Processing — During the first quarter of 2021, Antero Midstream connected 14 wells to its gathering system. The Company’s 3.2 Bcf/d of compression capacity was approximately 85% utilized during the quarter. Joint Venture processing capacity of 1.4 Bcf/d was approximately 100% utilized during the quarter and Joint Venture fractionation capacity was 95% utilized during the quarter.

Water Handling— Antero Midstream’s Marcellus water delivery systems serviced 24 well completions during the first quarter of 2021, a 44% decrease from the prior year quarter, driven by a reduction in completion activity by Antero Resources as it transitioned to a maintenance capital development program.

Balance Sheet and Liquidity

As of March 31, 2021, Antero Midstream had approximately $625 million drawn on its $2.13 billion bank credit facility, resulting in approximately $1.5 billion of liquidity. Antero Midstream’s Net Debt to trailing twelve months Adjusted EBITDA (“Leverage”) was 3.7x as of March 31, 2021.

Capital Investments

Total accrued capital expenditures including investments in the Joint Venture were $30 million during the first quarter of 2021. Gathering, compression, and water infrastructure capital investments totaled $29 million and investments in unconsolidated affiliates for the Joint Venture were $1 million. Of the $29 million invested in gathering, compression, and water infrastructure, $18 million was in gathering and compression assets and $11 million was in water handling assets.

Michael Kennedy, CFO of Antero Midstream, said, “The first quarter of 2021 marked the low point in forecasted capital expenditures for 2021 as we begin construction on the infrastructure supporting the drilling partnership that is expected to generate future throughput growth on Antero Midstream dedicated acreage. As a result, we expect to invest approximately two-thirds of our $240 million to $260 million capital budget in the second and third quarter of 2021 combined, which results in an increase in quarterly capital expenditures compared to the first quarter of 2021. Importantly, during this period of increased capital expenditures we expect our leverage and net debt to remain stable at 3.7x and $3.1 billion, respectively.”

Conference Call

A conference call for Antero Midstream is scheduled on Thursday, April 29, 2021 at 10:00 am MT to discuss the financial and operational results. A brief Q&A session for security analysts will immediately follow the discussion of the results for the quarter. To participate in the call, dial in at 877-407-9126 (U.S.), or 201-493-6751 (International) and reference “Antero Midstream”. A telephone replay of the call will be available until Thursday, May 6, 2021 at 10:00 am MT at 877-660-6853 (U.S.) or 201-612-7415 (International) using the conference ID: 13718719. To access the live webcast and view the related earnings conference call presentation, visit Antero Midstream's website at www.anteromidstream.com. The webcast will be archived for replay until Thursday, May 6, 2021 at 10:00 am MT.

Non-GAAP Financial Measures and Definitions

Antero Midstream uses certain non-GAAP financial measures. Antero Midstream defines Adjusted Net Income as net income (loss) plus amortization of customer contracts, impairment expense, and loss on asset sale, net of tax effect of reconciling items. Antero Midstream uses Adjusted Net Income to assess the operating performance of its assets. Antero Midstream defines Adjusted EBITDA as net income (loss) plus interest expense, provision for income tax expense (benefit), amortization of customer relationships, depreciation expense, impairment expense, accretion, equity-based compensation expense, excluding equity in earnings of unconsolidated affiliates, plus cash distributions from unconsolidated affiliates and loss on asset sale.

Antero Midstream uses Adjusted EBITDA to assess:

Antero Midstream defines Free Cash Flow before dividends as Adjusted EBITDA less interest expense and accrued capital expenditures. Free Cash Flow after dividends is defined as Free Cash Flow before dividends less dividends declared for the quarter. Antero Midstream uses Free Cash Flow before and after dividends as a performance metric to compare the cash generating performance of Antero Midstream from period to period.

Adjusted EBITDA, Adjusted Net Income, and Free Cash Flow before and after dividends are non-GAAP financial measures. The GAAP measure most directly comparable to Adjusted EBITDA and Adjusted Net Income is Net Income. The GAAP measure most directly comparable to Free Cash Flow before and after dividends is cash flows provided by (used in) operating activities. Such non-GAAP financial measures should not be considered as alternatives to the GAAP measures of Net Income and cash flows provided by (used in) operating activities. The presentations of such measures are not made in accordance with GAAP and have important limitations as analytical tools because they include some, but not all, items that affect Net Income and cash flows provided by (used in) operating activities. You should not consider any or all such measures in isolation or as a substitute for analyses of results as reported under GAAP. Antero Midstream’s definitions of such measures may not be comparable to similarly titled measures of other companies.

Antero Midstream defines Net Debt as consolidated total debt less cash and cash equivalents. Antero Midstream views Net Debt as an important indicator in evaluating Antero Midstream’s financial leverage.

This release also includes certain non-GAAP financial information for Antero Resources. For a more information regarding those measures, please see Antero Resources’ press release dated today, a copy of which can be found on Antero Resources website, www.anteroresources.com. For additional information on the drilling partnership please see Antero Resources’ press release and Annual Report on Form 10-K, which can also be found at www.anteroresources.com.

The Company’s ability to pay future dividends is substantially dependent upon the development and drilling plan of Antero Resources, which itself is substantially dependent upon the review and approval by the Board of Directors of Antero Resources of its capital budget on an annual basis.  The Board of Directors of Antero Midstream will take into consideration many factors, including the capital budget of Antero Resources adopted by its Board of Directors and the capital resources and liquidity of Antero Midstream at the time, prior to approving future dividends.

The following table reconciles cash paid for capital expenditures and accrued capital expenditures during the period (in thousands):

The following table reconciles consolidated total debt to consolidated net debt, excluding debt premiums and issuance costs, (“Net Debt”) as used in this release (in thousands):

The following table reconciles net loss to Adjusted EBITDA for the last twelve months as used in this release (in thousands):

Antero Midstream Corporation is a Delaware corporation that owns, operates and develops midstream gathering, compression, processing and fractionation assets located in the Appalachian Basin, as well as integrated water assets that primarily service Antero Resources Corporation’s properties.

This release includes "forward-looking statements.” Such forward-looking statements are subject to a number of risks and uncertainties, many of which are not under Antero Midstream’s control. All statements, except for statements of historical fact, made in this release regarding activities, events or developments Antero Midstream expects, believes or anticipates will or may occur in the future, such as statements regarding Antero Midstream’s ability to execute its business plan and return capital to its stockholders, information regarding Antero Midstream’s return of capital policy, information regarding long-term financial and operating outlooks for Antero Midstream and Antero Resources, information regarding Antero Resources’ expected future growth and its ability to meet its drilling and development plan and the participation level of Antero Resources’ drilling partner and the impact on demand for Antero Midstream’s services as a result of incremental production by Antero Resources, are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. All forward-looking statements speak only as of the date of this release. Although Antero Midstream believes that the plans, intentions and expectations reflected in or suggested by the forward-looking statements are reasonable, there is no assurance that these plans, intentions or expectations will be achieved. Therefore, actual outcomes and results could materially differ from what is expressed, implied or forecast in such statements. Except as required by law, Antero Midstream expressly disclaims any obligation to and does not intend to publicly update or revise any forward-looking statements.

Antero Midstream cautions you that these forward-looking statements are subject to all of the risks and uncertainties incident to our business, most of which are difficult to predict and many of which are beyond Antero Midstream’s control. These risks include, but are not limited to, commodity price volatility, inflation, environmental risks, Antero Resources’ drilling and completion and other operating risks, regulatory changes, the uncertainty inherent in projecting Antero Resources’ future rates of production, cash flows and access to capital, the timing of development expenditures, impacts of world health events, including the COVID-19 pandemic, and the other risks described under the heading "Item 1A. Risk Factors" in Antero Midstream's Annual Report on Form 10-K for the year ended December 31, 2020.

For more information, contact Michael Kennedy – CFO of Antero Midstream, at (303) 357-6782 or mkennedy@anteroresources.com.

ANTERO MIDSTREAM CORPORATION

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