Petro's Bread Distributors has served the tri-state area since 1985, is family owned across three generations, and does not bake. It carries bread, rolls, bagels, pita, muffins, croissants and pastries from a range of area bakeries and delivers seven days a week, taking orders by telephone only with a 3pm weekday cut-off. Philadelphia Bakery Merchants does the same thing and states the proposition outright: picture the convenience of making just one phone call, paying one bill, and receiving delivery of all your breads and pastries from one company. It distributes for what it calls the ten best bakeries in the metro, artisan, Jewish and Italian, on a six-day schedule reaching Reading, Lancaster, Harrisburg and South Jersey.
No other city in this directory produced that shape. Chicago, Los Angeles, Miami, Baltimore, Dallas and New York all have bakeries that sell wholesale and ingredient houses that sell to bakers; Philadelphia has two companies whose entire business is being the middle. There is an obvious reason: in a city where the roll is the product, a sandwich shop may genuinely want a specific bakery's roll and a different bakery's bread, and running two accounts for that is friction somebody was always going to sell a solution to.
The corroboration for both is unusually good, because an institutional buyer describes them independently. A college dining sustainability page lists Petro's, owned and operated by the Trantas family and serving the tri-state area since 1985, and Philadelphia Bakery Merchants, which it says reliably distributes bread from renowned local bakeries including two that are separately listed on this page. That is a customer confirming a supplier relationship, which is rarer in this research than it sounds.
If you are running one kitchen and want two bakeries' bread, these are the two companies to call first. If you are running enough volume to want a direct account, the rest of this page is the list.