AM · Antero Midstream Corp · Insider Trading

The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.21 to $21.30, inclusive. The reporting person undertakes to provide to Antero Midstream Corporation (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1).

The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.96 to $22.06, inclusive. The reporting person undertakes to provide to Antero Midstream Corporation (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1).

Includes 81,755 shares of common stock, par value $0.01 per share, of the Issuer subject to previously granted restricted stock units that remain subject to vesting.

The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.55 to $22.00, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1).

Includes 226,850 shares of common stock subject to previously granted restricted stock units that remain subject to vesting.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 6, 2025.

The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.57 to $22.06, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2).

Includes 472,354 shares of Common Stock subject to previously granted restricted stock units that remain subject to vesting.

The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.66 to $22.87, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (5).

Includes 81,755 shares of Common Stock subject to previously granted RSUs that remain subject to vesting.

The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.68 to $22.90, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (5).

Includes 226,850 shares of Common Stock subject to previously granted RSUs that remain subject to vesting.

In connection with the vesting and settlement of RSUs through the issuance of Common Stock pursuant to the Plan, the Issuer withheld shares of Common Stock that would otherwise have been issued to the Reporting Person to satisfy their tax withholding obligations. The number of shares of Common Stock withheld was determined based on the closing price per share of Common Stock on March 6, 2026.

Includes 472,354 shares of Common Stock subject to previously granted RSUs that remain subject to vesting.

In connection with the vesting and settlement of RSUs through the issuance of Common Stock pursuant to the Plan, the Issuer withheld shares of Common Stock that would otherwise have been issued to the Reporting Person to satisfy their tax withholding obligations. The number of shares of Common Stock withheld was determined based on the closing price per share of Common Stock on March 6, 2026.

Includes 81,755 shares of Common Stock subject to previously granted RSUs that remain subject to vesting.

Includes 472,354 shares of Common Stock subject to previously granted RSUs that remain subject to vesting.

In connection with the vesting and settlement of RSUs through the issuance of Common Stock pursuant to the Plan, the Issuer withheld shares of Common Stock that would otherwise have been issued to the Reporting Person to satisfy their tax withholding obligations. The number of shares of Common Stock withheld was determined based on the closing price per share of Common Stock on March 6, 2026.

Includes 64,061 shares of Common Stock subject to previously granted RSUs that remain subject to vesting.

Reflects the grant of restricted stock units ("RSUs") pursuant to the Amended and Restated Antero Midstream Corporation Long Term Incentive Plan (the "Plan") which vest as to 1/3 of the total amount granted on each of the first three anniversaries of March 7, 2026, generally subject to continued employment through each vesting date.

Includes 377,488 shares of common stock, par value $0.01 per share ("Common Stock"), of Antero Midstream Corporation (the "Issuer") subject to previously granted RSUs that remain subject to vesting.

In connection with the vesting and settlement of RSUs through the issuance of Common Stock pursuant to the Plan, the Issuer withheld shares of Common Stock that would otherwise have been issued to the Reporting Person to satisfy their tax withholding obligations. The number of shares of Common Stock withheld was determined based on the closing price per share of Common Stock on March 6, 2026.

Includes 226,850 shares of Common Stock subject to previously granted RSUs that remain subject to vesting.

Reflects the grant of restricted stock units ("RSUs") pursuant to the Amended and Restated Antero Midstream Corporation Long Term Incentive Plan (the "Plan") which vest as to 1/3 of the total amount granted on each of the first three anniversaries of March 7, 2026, generally subject to continued employment through each vesting date.

Includes 99,299 shares of common stock, par value $0.01 per share ("Common Stock"), of Antero Midstream Corporation (the "Issuer") subject to previously granted RSUs that remain subject to vesting.

Reflects the grant of restricted stock units ("RSUs") pursuant to the Amended and Restated Antero Midstream Corporation Long Term Incentive Plan (the "Plan") which vest as to 1/3 of the total amount granted on each of the first three anniversaries of March 7, 2026, generally subject to continued employment through each vesting date.

Includes 139,140 shares of common stock, par value $0.01 per share ("Common Stock"), of Antero Midstream Corporation (the "Issuer") subject to previously granted RSUs that remain subject to vesting.

In connection with the vesting and settlement of RSUs through the issuance of Common Stock pursuant to the Plan, the Issuer withheld shares of Common Stock that would otherwise have been issued to the Reporting Person to satisfy their tax withholding obligations. The number of shares of Common Stock withheld was determined based on the closing price per share of Common Stock on March 6, 2026.

Includes 217,185 shares of Common Stock subject to previously granted RSUs that remain subject to vesting.

Reflects the grant of RSUs pursuant to the Amended and Restated Antero Midstream Corporation Long Term Incentive Plan (the "Plan") which vest as to 1/3 of the total amount granted on each of the first three anniversaries of March 7, 2026, generally subject to continued employment through each vesting date.

Includes 719,114 shares of common stock, par value $0.01 per share ("Common Stock"), of Antero Midstream Corporation (the "Issuer") subject to previously granted RSUs that remain subject to vesting.

Reflects the grant of restricted stock units ("RSUs") pursuant to the Amended and Restated Antero Midstream Corporation Long Term Incentive Plan (the "Plan") which vest as to 1/3 of the total amount granted on each of the first three anniversaries of March 7, 2026, generally subject to continued employment through each vesting date.

Includes 345,752 shares of common stock, par value $0.01 per share ("Common Stock"), of Antero Midstream Corporation (the "Issuer") subject to previously granted RSUs that remain subject to vesting.

In connection with the vesting and settlement of PSUs through the issuance of Common Stock pursuant to the Amended and Restated Antero Midstream Corporation Long Term Incentive Plan, the Issuer withheld Common Stock that would otherwise have been issued to the Reporting Person to satisfy their tax withholding obligations. The number of shares of Common Stock withheld was determined based on the closing price per share of Common Stock on February 24, 2026.

Includes 247,799 shares of Common Stock subject to previously granted restricted stock unit awards that remain subject to vesting.

Each performance share unit ("PSU") represented a contingent right to receive one share of common stock ("Common Stock") of Antero Midstream Corporation (the "Issuer"). On February 24, 2026, the Compensation Committee of the Issuer certified performance and authorized settlement with respect to PSUs originally granted on April 15, 2023, which vested based on the Issuer's return on invested capital over a three year period.

Includes 279,535 shares of Common Stock subject to previously granted restricted stock unit awards that remain subject to vesting.

In connection with the vesting and settlement of PSUs through the issuance of Common Stock pursuant to the Amended and Restated Antero Midstream Corporation Long Term Incentive Plan, the Issuer withheld Common Stock that would otherwise have been issued to the Reporting Person to satisfy their tax withholding obligations. The number of shares of Common Stock withheld was determined based on the closing price per share of Common Stock on February 24, 2026.

Includes 279,535 shares of Common Stock subject to previously granted restricted stock unit awards that remain subject to vesting.

Each performance share unit ("PSU") represented a contingent right to receive one share of common stock ("Common Stock") of Antero Midstream Corporation (the "Issuer"). On February 24, 2026, the Compensation Committee of the Issuer certified performance and authorized settlement with respect to PSUs originally granted on April 15, 2023, which vested based on the Issuer's return on invested capital over a three year period.

Includes 457,904 shares of Common Stock subject to previously granted restricted stock unit awards that remain subject to vesting.

In connection with the vesting and settlement of PSUs through the issuance of Common Stock pursuant to the Amended and Restated Antero Midstream Corporation Long Term Incentive Plan, the Issuer withheld Common Stock that would otherwise have been issued to the Reporting Person to satisfy their tax withholding obligations. The number of shares of Common Stock withheld was determined based on the closing price per share of Common Stock on February 24, 2026.

Includes 457,904 shares of Common Stock subject to previously granted restricted stock unit awards that remain subject to vesting.

Each performance share unit ("PSU") represented a contingent right to receive one share of common stock ("Common Stock") of Antero Midstream Corporation (the "Issuer"). On February 24, 2026, the Compensation Committee of the Issuer certified performance and authorized settlement with respect to PSUs originally granted on April 15, 2023, which vested based on the Issuer's return on invested capital over a three year period.

Includes 247,799 shares of Common Stock subject to previously granted restricted stock unit awards that remain subject to vesting.

The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.57 to $17.61, inclusive. The reporting person undertakes to provide Antero Midstream Corporation (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1).

Includes 457,904 shares of common stock of Antero Midstream Corporation subject to previously granted restricted stock units that remain subject to vesting.