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POTBELLY SANDWICH SHOP Potbelly Corporation Reports Results for Second Fiscal Quarter 2021 Sales momentum accelerated throughout the second quarter , driven by ongoing recovery in the operating environment and impact from strategic initiatives Second consecutive quarter of shop - level profitability Improved volume across all channels , led by Dine - In which had a 5 % increase in sales sequentially Chicago , IL . August 5 , 2021 – Potbelly Corporation ( NASDAQ : PBPB ) ( “ Potbelly " or the " Company " ) , the iconic neighborhood sandwich shop concept , today reported financial results for the second fiscal quarter ended June 27 , 2021 . Second Quarter Strategic Successes : • • • Same - store sales ( SSS ) trends continued to show sequential improvement , ending the second quarter at + 70.0 % vs ( 3.1 % ) in the first quarter of 2021 ; SSS approached 2019 levels , at ( -0.7 % ) compared to the second quarter of 2019 . Second consecutive quarter of shop - level profitability and 23.8 % growth in Average Unit Volume ( AUV ) compared to the first quarter 2021 . Suburban shops , approximately 60 % of units , continued to show strength with shop - level margin of 15.2 % , slightly exceeding the 2019 average level across all shop types . Continued traction in the ' Traffic - Driven Profitability ' strategic plan , pivoting toward growth - driving actions , with new menu rollout scheduled in the coming weeks . Strong results for Potbelly Perks loyalty program , adding 142,000 new members during the quarter , with Perks sales representing nearly 18 % of total sales . Further strengthened leadership team with appointment of Larry Strain as Chief Development Officer . Subsequent to the quarter end , upgraded the tech stack with new mobile app , website , digital order and Perks loyalty program integration . Key highlights for the thirteen weeks ended June 27 , 2021 compared to March 28 , 2021 : • Total revenues increased by 24.9 % to $ 97.5 million compared to $ 78.1 million . • • • GAAP net loss attributable to Potbelly was ( $ 3.9 ) million , compared to a GAAP net loss of ( $ 14.5 ) million . GAAP diluted loss per share was ( $ 0.14 ) compared to a GAAP diluted loss per share of ( $ 0.56 ) . Adjusted net loss¹ attributable to Potbelly was ( $ 2.9 ) million compared to an adjusted net loss of ( $ 8.5 ) million . Adjusted diluted EPS¹ was a loss of ( $ 0.10 ) compared to an adjusted diluted EPS loss of ( $ 0.33 ) . EBITDA¹ improved significantly to $ 1.0 million from an EBITDA loss of ( $ 10.0 ) million . Adjusted EBITDA¹ improved meaningfully to $ 1.9 million compared to Adjusted EBITDA loss of ( $ 6.6 ) million . 1