Exhibit 99.1 Joint Filer Information Name of Joint Filer: Berkshire Partners LLC Address of Joint Filer: 200 Clarendon Street 35th Floor Boston, MA 02116-5021 Issuer Name and Ticker or Trading Symbol: Portillo's Inc. [PTLO] Date of the Earliest Transaction Required to be Reported (Month/Day/Year): 1/18/2022 Designated Filer: Berkshire Partners LLC Signature: Berkshire Partners LLC By: BPSP, L.P., its managing member By: Berkshire Partners Holdings LLC, its general partner /s/ ------------------------------- Name: Sharlyn C. Heslam Title: Managing Director 1/20/2022 --------- Date Joint Filer Information Name of Joint Filer: Berkshire Fund VIII-A, L.P. Address of Joint Filer: 200 Clarendon Street 35th Floor Boston, MA 02116-5021 Issuer Name and Ticker or Trading Symbol: Portillo's Inc. [PTLO] Date of the Earliest Transaction Required to be Reported (Month/Day/Year): 1/18/2022 Designated Filer: Berkshire Partners LLC Signature: Berkshire Fund VIII-A, L.P. By Eighth Berkshire Associates LLC, its general partner /s/ ------------------------------- Name: Sharlyn C. Heslam Title: Managing Director 1/20/2022 --------- Date Joint Filer Information Name of Joint Filer: Eighth Berkshire Associates LLC Address of Joint Filer: 200 Clarendon Street 35th Floor Boston, MA 02116-5021 Issuer Name and Ticker or Trading Symbol: Portillo's Inc. [PTLO] Date of the Earliest Transaction Required to be Reported (Month/Day/Year): 1/18/2022 Designated Filer: Berkshire Partners LLC Signature: Eighth Berkshire Associates LLC /s/ ------------------------------- Name: Sharlyn C. Heslam Title: Managing Director 1/20/2022 --------- Date Joint Filer Information Name of Joint Filer: Berkshire Partners Holdings LLC Address of Joint Filer: 200 Clarendon Street 35th Floor Boston, MA 02116-5021 Issuer Name and Ticker or Trading Symbol: Portillo's Inc. [PTLO] Date of the Earliest Transaction Required to be Reported (Month/Day/Year): 1/18/2022 Designated Filer: Berkshire Partners LLC Signature: Berkshire Partners Holdings LLC /s/ ------------------------------- Name: Sharlyn C. Heslam Title: Managing Director 1/20/2022 --------- Date Joint Filer Information Name of Joint Filer: BPSP, L.P. Address of Joint Filer: 200 Clarendon Street 35th Floor Boston, MA 02116-5021 Issuer Name and Ticker or Trading Symbol: Portillo's Inc. [PTLO] Date of the Earliest Transaction Required to be Reported (Month/Day/Year): 1/18/2022 Designated Filer: Berkshire Partners LLC Signature: BPSP, L.P. By: Berkshire Partners Holdings LLC, its general partner /s/ ------------------------------- Name: Sharlyn C. Heslam Title: Managing Director 1/20/2022 --------- Date
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4 Filing
Berkshire Partners Form 4Change in insider ownership
Filed: 20 Jan 22, 8:16pm