- Lifespan Chartiers Senior Ctr
- Limar Gallery Inc
- Linc Systems Inc
- Lindenwood Studio
- Liquix Oil Co
- Living Pictures
- Loftus Associates LLC
- Londonbury Homes Inc
- Long John Silver's
- Longbeach Mortgage
- Lorrie's Hair So New
- Loud & Clear Communications
- Lowe's Carpet & Upholstery
- Luxury Bath Of Pittsburgh
- Lytle Brothers Garage
- M & J Electric Inc
- M Mallinger & Co Inc
- Mabey Bridge & Shore Inc
- Mactec
- Mad Mex South Hills
