PROS Holdings, Inc. announced plans to expand its offices in Sofia, Bulgaria, to accommodate its growing business. The company has leased two floors in the new 20-story TELUS Tower, located in the city’s Central Business District. The company will occupy 2,134 square meters or 22,970 square feet, more than doubling its existing footprint, with space that will accommodate up to 200 employees. The company plans to occupy the offices in February 2018.