ALLO · Allogene Therapeutics, Inc.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in 4 successive equal annual installments over the four-year period measured from July 20, 2026, subject to continued service through the vesting date.

25% of the shares subject to the stock option shall vest on July 1, 2027, and the remaining shares shall vest in 36 equal monthly installments thereafter.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in two successive equal semi-annual installments over the one-year period measured from the date of grant, subject to continued service through the vesting date.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Company Common Stock. The RSUs will vest in two successive equal semi-annual installments over the one-year period measured from the date of grant, subject to continued service through the vesting date. The reporting person has elected to defer the receipt of Common Stock upon the vesting of their RSUs pursuant to the Company's Non-Employee Director Compensation Policy until earlier of (i) 30 days following separation from continuous service with the company and (ii) a change in control of the Company.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in two successive equal semi-annual installments over the one-year period measured from the date of grant, subject to continued service through the vesting date.

Each RSU represents a contingent right to receive either one share of common stock of the Issuer or cash in lieu thereof, at the Issuer's discretion, in accordance with the terms of the 2018 Plan.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in two successive equal semi-annual installments over the one-year period measured from the date of grant, subject to continued service through the vesting date.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Company Common Stock. The RSUs will vest in two successive equal semi-annual installments over the one-year period measured from the date of grant, subject to continued service through the vesting date. The reporting person has elected to defer the receipt of Common Stock upon the vesting of their RSUs pursuant to the Company's Non-Employee Director Compensation Policy until earlier of (i) 30 days following separation from continuous service with the company and (ii) a change in control of the Company.

Vesting in 12 equal monthly installments.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Company Common Stock. The RSUs will vest in two successive equal semi-annual installments over the one-year period measured from the date of grant, subject to continued service through the vesting date. The reporting person has elected to defer the receipt of Common Stock upon the vesting of their RSUs pursuant to the Company's Non-Employee Director Compensation Policy until earlier of (i) 30 days following separation from continuous service with the company and (ii) a change in control of the Company.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in two successive equal semi-annual installments over the one-year period measured from the date of grant, subject to continued service through the vesting date.

Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions ranging from $2.31 to $2.33, inclusive. The reporting person undertakes to provide 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 above.

Includes 3,781 shares of the Issuer's common stock acquired by the reporting person on March 15, 2026 pursuant to an employee stock purchase program.

Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

1. Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

3. Includes 12,500 shares of the Issuer's common stock acquired by the reporting person on March 15, 2026 pursuant to an employee stock purchase program.

Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.46 to $2.47, 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 above.

Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.60 to $2.67, 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 above.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in 4 successive equal annual installments over the four-year period measured from February 2, 2026, subject to continued service through the vesting date.

Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions ranging from $1.71 to $1.82, inclusive. The reporting person undertakes to provide 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 above.

25% of the shares subject to the stock option shall vest on February 2, 2027, and the remaining shares shall vest in 36 equal monthly installments thereafter.

25% of the shares subject to the stock option shall vest on February 2, 2027, and the remaining shares shall vest in 36 equal monthly installments thereafter.

25% of the shares subject to the stock option shall vest on February 2, 2027, and the remaining shares shall vest in 36 equal monthly installments thereafter.

Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions ranging from $1.71 to $1.87, inclusive. The reporting person undertakes to provide 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 above.

Includes 4,562 shares of the Issuer's common stock acquired by the reporting person on September 15, 2025 pursuant to an employee stock purchase program.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in 4 successive equal annual installments over the four-year period from February 2, 2026, subject to continued service through the vesting date.

25% of the shares subject to the stock option shall vest on February 2, 2027, and the remaining shares shall vest in 36 equal monthly installments thereafter.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in 4 successive equal annual installments over the four-year period measured from February 2, 2026, subject to continued service through the vesting date.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in 4 successive equal annual installments over the four-year period measured from February 2, 2026, subject to continued service through the vesting date.

25% of the shares subject to the stock option shall vest on February 2, 2027, and the remaining shares shall vest in 36 equal monthly installments thereafter.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in 4 successive equal annual installments over the four-year period measured from February 2, 2026, subject to continued service through the vesting date.

25% of the shares subject to the stock option shall vest on February 2, 2027, and the remaining shares shall vest in 36 equal monthly installments thereafter.

Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.71 to $1.75, 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 above.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in 4 successive equal annual installments over the four-year period measured from February 2, 2026, subject to continued service through the vesting date.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in 4 successive equal annual installments over the four-year period measured from February 2, 2026, subject to continued service through the vesting date.

Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions ranging from $1.71 to $1.83, inclusive. The reporting person undertakes to provide 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 above.

25% of the shares subject to the stock option shall vest on February 2, 2027, and the remaining shares shall vest in 36 equal monthly installments thereafter.

Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions ranging from $1.71 to $1.74, inclusive. The reporting person undertakes to provide 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 above.

Includes 3,826 shares of the Issuer's common stock acquired by the reporting person on September 15, 2025 pursuant to an employee stock purchase program.

Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions ranging from $1.71 to $1.87, inclusive. The reporting person undertakes to provide 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 above.

Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

On June 23, 2025, this grant was erroneously reported as 94,500 shares and is corrected here upon the vesting of the first of the semi-annual installments.

Each RSU represents a contingent right to receive either one share of common stock of the Issuer or cash in lieu thereof, at the Issuer's discretion, in accordance with the terms of the 2018 Plan.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in two successive equal semi-annual installments over the one-year period measured from the date of grant, subject to continued service through the vesting date.

Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.22 to $1.23, 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 above.

Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

Pursuant to an employee stock purchase program, includes 6,000 shares of the Issuer's common stock acquired by the reporting person on March 14, 2025 and 6,000 shares of the Issuer's common stock acquired by the reporting person on September 15,2025.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in two successive equal semi-annual installments over the one-year period measured from the date of grant, subject to continued service through the vesting date. Ms. Messemer has elected to defer the receipt of Common Stock upon the vesting of her RSUs pursuant to the Companys Non-Employee Director Compensation Policy until the earlier of (i) 30 days following separation from the Board or (ii) a change in control of the Company.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Company Common Stock. The RSUs will vest in two successive equal semi-annual installments over the one-year period measured from the date of grant, subject to continued service through the vesting date. The reporting person has elected to defer the receipt of Common Stock upon the vesting of their RSUs pursuant to the Company's Non-Employee Director Compensation Policy until earlier of (i) 30 days following separation from continuous service with the company and (ii) a change in control of the Company.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in two successive equal semi-annual installments over the one-year period measured from the date of grant, subject to continued service through the vesting date. Ms. Barrett has elected to defer the receipt of Common Stock upon the vesting of her RSUs pursuant to the Companys Non-Employee Director Compensation Policy until the earlier of (i) 30 days following separation from the Board or (ii) a change in control of the Company.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in two successive equal semi-annual installments over the one-year period measured from the date of grant, subject to continued service through the vesting date. Mr. Mayo has elected to defer the receipt of Common Stock upon the vesting of her RSUs pursuant to the Companys Non-Employee Director Compensation Policy until the earlier of (i) 30 days following separation from the Board or (ii) a change in control of the Company.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in two successive equal semi-annual installments over the one-year period measured from the date of grant, subject to continued service through the vesting date.

Vesting in 12 equal monthly installments.

Represents an award of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of the Companys Common Stock. The RSUs will vest in two successive equal semi-annual installments over the one-year period measured from the date of grant, subject to continued service through the vesting date. Mr. Humer has elected to defer the receipt of Common Stock upon the vesting of her RSUs pursuant to the Companys Non-Employee Director Compensation Policy until the earlier of (i) 30 days following separation from the Board or (ii) a change in control of the Company.

This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 8/30/2024.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions ranging from $1.38 to $1.445, inclusive. The reporting person undertakes to provide 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 above.

Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plant to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

Includes 2274 shares of the Issuer's common stock acquired by the reporting person on March 14, 2025 pursuant to an employee stock purchase program.