AVIR · Atea Pharmaceuticals, Inc.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs vested in full on June 18, 2026.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The option vests and becomes exercisable in twelve (12) substantially equal monthly installments following June 18, 2026, such that the option shall be fully vested on June 18, 2027, subject to the Reporting Person's continued service through each such vesting date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs vest in a single installment on the earlier of (i) the date of the next annual meeting of the Issuer's stockholders occurring after June 18, 2026 or (ii) June 18, 2027, in each case, subject to the Reporting Person's continued service through the applicable vesting date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs vest in a single installment on the earlier of (i) the date of the next annual meeting of the Issuer's stockholders occurring after June 18, 2026 or (ii) June 18, 2027, in each case, subject to the Reporting Person's continued service through the applicable vesting date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The option vests and becomes exercisable in twelve (12) substantially equal monthly installments following June 18, 2026, such that the option shall be fully vested on June 18, 2027, subject to the Reporting Person's continued service through each such vesting date.

The option vests and becomes exercisable in twelve (12) substantially equal monthly installments following June 18, 2026, such that the option shall be fully vested on June 18, 2027, subject to the Reporting Person's continued service through each such vesting date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs vested in full on June 18, 2026.

The option vests and becomes exercisable in twelve (12) substantially equal monthly installments following June 18, 2026, such that the option shall be fully vested on June 18, 2027, subject to the Reporting Person's continued service through each such vesting date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs vest in a single installment on the earlier of (i) the date of the next annual meeting of the Issuer's stockholders occurring after June 18, 2026 or (ii) June 18, 2027, in each case, subject to the Reporting Person's continued service through the applicable vesting date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs vested in full on June 18, 2026.

The option vests and becomes exercisable in twelve (12) substantially equal monthly installments following June 18, 2026, such that the option shall be fully vested on June 18, 2027, subject to the Reporting Person's continued service through each such vesting date.

The option vests and becomes exercisable in twelve (12) substantially equal monthly installments following June 18, 2026, such that the option shall be fully vested on June 18, 2027, subject to the Reporting Person's continued service through each such vesting date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs vest in a single installment on the earlier of (i) the date of the next annual meeting of the Issuer's stockholders occurring after June 18, 2026 or (ii) June 18, 2027, in each case, subject to the Reporting Person's continued service through the applicable vesting date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs vested in full on June 18, 2026.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs vest in a single installment on the earlier of (i) the date of the next annual meeting of the Issuer's stockholders occurring after June 18, 2026 or (ii) June 18, 2027, in each case, subject to the Reporting Person's continued service through the applicable vesting date.

The option vests and becomes exercisable in twelve (12) substantially equal monthly installments following June 18, 2026, such that the option shall be fully vested on June 18, 2027, subject to the Reporting Person's continued service through each such vesting date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs vested in full on June 18, 2026.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs vested in full on June 18, 2026.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs vest in a single installment on the earlier of (i) the date of the next annual meeting of the Issuer's stockholders occurring after June 18, 2026 or (ii) June 18, 2027, in each case, subject to the Reporting Person's continued service through the applicable vesting date.

The option vests and becomes exercisable in twelve (12) substantially equal monthly installments following June 18, 2026, such that the option shall be fully vested on June 18, 2027, subject to the Reporting Person's continued service through each such vesting date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs vest in a single installment on the earlier of (i) the date of the next annual meeting of the Issuer's stockholders occurring after June 18, 2026 or (ii) June 18, 2027, in each case, subject to the Reporting Person's continued service through the applicable vesting date.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs vest in a single installment on the earlier of (i) the date of the next annual meeting of the Issuer's stockholders occurring after June 18, 2026 or (ii) June 18, 2027, in each case, subject to the Reporting Person's continued service through the applicable vesting date.

This Form 4/A has been filed solely to correct the date of the transaction reported in Column 2 of Table I of the Reporting Person's Form 4 filed on May 20, 2026, which was inadvertently noted as "May 18, 2025" instead of "May 18, 2026."

The price reported in Column 4 is a weighted average price. The securities were purchased in multiple transactions at prices ranging from $4.14 to $4.19 per share of common stock. 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 purchased at each separate price within the range set forth in this footnote.

The option is fully vested and exercisable.

The option is fully vested and exercisable.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The original grant of 124,600 RSUs vested in three (3) equal annual installments on the first three anniversaries of January 31, 2023 such that the RSUs were fully vested as of January 31, 2026.

The option vests and becomes exercisable in forty-eight (48) equal monthly installments following January 31, 2026 such that the option is fully vested on January 31, 2030.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Reflected one (1) share correction due to prior administrative rounding error with respect to RSU vesting in 2026.

Reflects RSUs following the satisfaction of performance criteria of previously granted performance restricted stock units that vested on January 31, 2026.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Reflects RSUs following the satisfaction of performance criteria of previously granted performance restricted stock units that vested on January 31, 2026.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The original grant of 520,400 RSUs vested in three (3) equal annual installments on the first three anniversaries of January 31, 2023 such that the RSUs were fully vested as of January 31, 2026.

The option vests and becomes exercisable in forty-eight (48) equal monthly installments following January 31, 2026 such that the option is fully vested on January 31, 2030.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Includes 7,507 additional shares acquired under the Atea Pharmaceuticals, Inc. 2020 Employee Stock Purchase Plan.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The original grant of 100,000 RSUs vested in three (3) equal annual installments on the first three anniversaries of January 31, 2023 such that the RSUs were fully vested as of January 31, 2026.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The original grant of 100,000 RSUs vested in three (3) equal annual installments on the first three anniversaries of January 31, 2023 such that the RSUs were fully vested as of January 31, 2026.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Reflects RSUs following the satisfaction of performance criteria of previously granted performance restricted stock units that vested on January 31, 2026.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Reflects RSUs following the satisfaction of performance criteria of previously granted performance restricted stock units that vested on January 31, 2026.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Reflects RSUs following the satisfaction of performance criteria of previously granted performance restricted stock units that vested on January 31, 2026.