PTLO · Portillo's Inc.

Represents shares deducted to satisfy tax withholding obligations on the vesting of the award reported herein.

Represents shares deducted to satisfy tax withholding obligations on the vesting of the award reported herein.

Includes shares of Class A Common Stock purchased pursuant to the Portillo's Inc. 2022 Employee Stock Purchase Plan ("ESPP"), for the purchase period of March 1, 2026 to May 31, 2026. In accordance with the ESPP, these shares were purchased at a price equal to 90% of the closing price of Issuer's Class A Common Stock on May 29, 2026.

Includes shares of Class A Common Stock purchased pursuant to the Portillo's Inc. 2022 Employee Stock Purchase Plan ("ESPP"), for the purchase period of March 1, 2026 to May 31, 2026. In accordance with the ESPP, these shares were purchased at a price equal to 90% of the closing price of Issuer's Class A Common Stock on May 29, 2026.

Includes shares of Class A Common Stock purchased pursuant to the Portillo's Inc. 2022 Employee Stock Purchase Plan ("ESPP"), for the purchase period of March 1, 2026 to May 31, 2026. In accordance with the ESPP, these shares were purchased at a price equal to 90% of the closing price of Issuer's Class A Common Stock on May 29, 2026.

Represents shares deducted to satisfy tax withholding obligations on the vesting of the award reported herein.

The price per share reported in this column is a weighted average price. These shares were acquired in multiple transactions at prices ranging from $4.23 to $4.32, inclusive. The reporting person undertakes to provide to 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 the preceding sentence.

Represents shares deducted to satisfy tax withholding obligations on the vesting of a previously disclosed award.

Represents shares deducted to satisfy tax withholding obligations on the vesting of a previously disclosed award.

Represents shares deducted to satisfy tax withholding obligations on the vesting of a previously disclosed award.

Represents shares deducted to satisfy tax withholding obligations on the vesting of a previously disclosed award.

Represents shares deducted to satisfy tax withholding obligations on the vesting of a previously disclosed award.

Represents restricted stock units granted on April 15, 2026, which will vest in full on December 31, 2026, subject to the Reporting Person's continued service with the Issuer through such vesting date and the terms of the applicable award agreement.

Represents restricted stock units subject to time-based vesting granted on April 15, 2026, one-third of which vest on each of the first three anniversaries of the grant date, subject to the Reporting Person's continued service with the Issuer and the terms of the applicable award agreement.

Represents restricted stock units subject to time-based vesting granted on April 15, 2026, one-third of which vest on each of the first three anniversaries of the grant date, subject to the Reporting Person's continued service with the Issuer and the terms of the applicable award agreement.

Represents restricted stock units subject to time-based vesting granted on April 15, 2026, one-third of which vest on each of the first three anniversaries of the grant date, subject to the Reporting Person's continued service with the Issuer and the terms of the applicable award agreement.

Represents restricted stock units subject to time-based vesting granted on April 15, 2026, one-third of which vest on each of the first three anniversaries of the grant date, subject to the Reporting Person's continued service with the Issuer and the terms of the applicable award agreement.

Represents restricted stock units subject to time-based vesting granted on April 15, 2026, one-third of which vest on each of the first three anniversaries of the grant date, subject to the Reporting Person's continued service with the Issuer and the terms of the applicable award agreement.

Represents restricted stock units subject to time-based vesting granted on April 15, 2026, one-third of which vest on each of the first three anniversaries of the grant date, subject to the Reporting Person's continued service with the Issuer and the terms of the applicable award agreement.

Represents shares deducted to satisfy tax withholding obligations on the vesting of previously disclosed awards.

Represents restricted stock units subject to time-based vesting granted on April 15, 2026, one-third of which vest on each of the first three anniversaries of the grant date, subject to the Reporting Person's continued service with the Issuer and the terms of the applicable award agreement.

Represents restricted stock units subject to time-based vesting granted on April 15, 2026, one-third of which vest on each of the first three anniversaries of the grant date, subject to the Reporting Person's continued service with the Issuer and the terms of the applicable award agreement.

Represents shares deducted to satisfy tax withholding obligations on the vesting of previously disclosed awards.

Represents shares deducted to satisfy tax withholding obligations on the vesting of previously disclosed awards.

Represents shares deducted to satisfy tax withholding obligations on the vesting of previously disclosed awards.

Represents shares deducted to satisfy tax withholding obligations on the vesting of previously disclosed awards.

Represents restricted stock units subject to time-based vesting, one-third of which vest on each April 15, 2026, 2027 and 2028, respectively, subject to the Reporting Person's continued service with the Issuer and the terms of the applicable award agreement.

The price per share reported in this column is a weighted average price. These shares were acquired in multiple transactions at prices ranging from $5.02 to $5.34, inclusive. The reporting person undertakes to provide to 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 the preceding sentence.

Represents shares of Class A common stock acquired in connection with the exchange by the Reporting Person of an equal number of LLC Units of PHD Group Holdings LLC in accordance with the terms of the Second Amended and Restated Limited Liability Company Agreement of PHD Group Holdings LLC, dated as of October 20, 2021 (the "LLC Agreement"). At the time of such exchange, an equal number of shares of Class B common stock of the Issuer held by the Reporting Person were cancelled, for no additional consideration, in accordance with the LLC Agreement.

Represents the exercise of options previously granted on 8/8/2016 pursuant to the Issuer's 2014 Equity Incentive Plan, which were substituted for options to purchase shares of Class A common stock under the Issuer's 2021 Equity Incentive Plan in connection with the Issuer's initial public offering. The options vested in equal annual installments on each of the first five anniversaries of the grant date, and are fully vested.

Represents the exercise of options previously granted on 8/8/2016 pursuant to the Issuer's 2014 Equity Incentive Plan, which were substituted for options to purchase shares of Class A common stock under the Issuer's 2021 Equity Incentive Plan in connection with the Issuer's initial public offering. The options vested in equal annual installments on each of the first five anniversaries of the grant date, and are fully vested.

Pursuant to the LLC Agreement, LLC Units held by the Reporting Person are exchangeable for shares of Class A common stock on a one-for-one basis, subject to certain exceptions, conditions and adjustments. The LLC Units have no expiration date.

Represents shares of Class A common stock acquired in connection with the exchange by the Reporting Person of an equal number of LLC Units of PHD Group Holdings LLC in accordance with the terms of the Second Amended and Restated Limited Liability Company Agreement of PHD Group Holdings LLC, dated as of October 20, 2021 (the "LLC Agreement"). At the time of such exchange, an equal number of shares of Class B common stock of the Issuer held by the Reporting Person were cancelled, for no additional consideration, in accordance with the LLC Agreement.

Represents restricted stock units ("RSUs") granted on March 2, 2026, which will vest in full on December 31, 2026, subject to the Reporting Person's continued service with the Issuer through such vesting date and the terms of the applicable award agreement.

Includes shares of Class A Common Stock purchased pursuant to the Portillo's Inc. 2022 Employee Stock Purchase Plan ("ESPP"), for the purchase period of December 1, 2025 to February 28, 2026. In accordance with the ESPP, these shares were purchased at a price equal to 90% of the closing price of Issuer's Class A Common Stock on February 27, 2026.

Represents shares deducted to satisfy tax withholding obligations on the vesting of the award reported herein.

Includes shares of Class A Common Stock purchased pursuant to the Portillo's Inc. 2022 Employee Stock Purchase Plan ("ESPP"), for the purchase period of December 1, 2025 to February 28, 2026. In accordance with the ESPP, these shares were purchased at a price equal to 90% of the closing price of Issuer's Class A Common Stock on February 27, 2026.

Represents shares deducted to satisfy tax withholding obligations on the vesting of the award reported herein.

Includes shares of Class A Common Stock purchased pursuant to the Portillo's Inc. 2022 Employee Stock Purchase Plan ("ESPP"), for the purchase period of December 1, 2025 to February 28, 2026. In accordance with the ESPP, these shares were purchased at a price equal to 90% of the closing price of Issuer's Class A Common Stock on February 27, 2026.

Represents shares deducted to satisfy tax withholding obligations on the vesting of the award reported herein.

Includes shares of Class A Common Stock purchased pursuant to the Portillo's Inc. 2022 Employee Stock Purchase Plan ("ESPP"), for the purchase period of December 1, 2025 to February 28, 2026. In accordance with the ESPP, these shares were purchased at a price equal to 90% of the closing price of Issuer's Class A Common Stock on February 27, 2026.

Represents restricted stock units granted on February 2, 2026, which will vest in full on February 2, 2027, subject to the terms of the applicable award agreement.

Represents restricted stock units granted on January 2, 2026, which will vest in full on January 2, 2027, subject to the terms of the applicable award agreement.

Represents restricted stock units ("RSUs") granted on January 2, 2026, which will vest in full on December 31, 2026, subject to the Reporting Person's continued service with the Issuer through such vesting date and the terms of the applicable award agreement. Upon vesting of the RSUs, the settlement has been deferred by the Reporting Person, pursuant to the Reporting Person's election made on December 27, 2025 and maintained by the Issuer.

Represents restricted stock units ("RSUs") granted on January 2, 2026, which will vest in full on December 31, 2026, subject to the Reporting Person's continued service with the Issuer through such vesting date and the terms of the applicable award agreement. Upon vesting of the RSUs, the settlement has been deferred by the Reporting Person, pursuant to the Reporting Person's election made on December 23, 2025 and maintained by the Issuer.

Represents restricted stock units ("RSUs") granted on January 2, 2026, which will vest in full on December 31, 2026, subject to the Reporting Person's continued service with the Issuer through such vesting date and the terms of the applicable award agreement. Upon vesting of the RSUs, the settlement has been deferred by the Reporting Person, pursuant to the Reporting Person's election made on December 23, 2025 and maintained by the Issuer.

Represents restricted stock units ("RSUs") granted on January 2, 2026, which will vest in full on December 31, 2026, subject to the Reporting Person's continued service with the Issuer through such vesting date and the terms of the applicable award agreement.

Any securities issued to the Reporting Person for service as a director of the Issuer is held by the Reporting Person for the benefit of funds or entities affiliated with Berkshire Partners LLC ("BP" and such affiliated funds or entities, the "BP Entities"). The Reporting Person disclaims beneficial ownership of such securities, except to the extent of the Reporting Person's pecuniary interest therein, and the inclusion of any securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

The Reporting Person disclaims beneficial ownership of such securities beneficially owned by any of the BP Entities, except to the extent of the Reporting Person's pecuniary interest therein, and the inclusion of any securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

Represents restricted stock units granted on January 2, 2026, which will vest in full on December 31, 2026, subject to the Reporting Person's continued service with the Issuer through such vesting date and the terms of the applicable award agreement.

Represents restricted stock units ("RSUs") granted on January 2, 2026, which will vest in full on December 31, 2026, subject to the Reporting Person's continued service with the Issuer through such vesting date and the terms of the applicable award agreement. Upon vesting of the RSUs, the settlement has been deferred by the Reporting Person, pursuant to the Reporting Person's election made on December 23, 2025 and maintained by the Issuer.