Pegasystems has leased three floors at 1 Rogers St. (Photo: Jones Lang LaSalle)

Pegasystems is open for business at 1 Rogers St., the company said Thursday.

The maker of business management software has taken three floors at the address — next to the CambridgeSide Galleria and Hotel Marlowe — as its corporate headquarters. Until Thursday, its base was 101 Main St. The move was long planned, with the deal announced in July 2011 as a way to make room for a company expansion.

The company has leased 162,000 square feet for a dozen years, according to Jones Lang LaSalle, the leasing and property management agent for owner Principal Global Investors. The building has a total six stories and 252,000 square feet, including a courtyard, and Pegasystems is now its anchor tenant, said John Osten, Jones Lang LaSalle’s executive vice president.

Pegasystems was founded in Cambridge in 1983 and is listed as having 1,858 employees. It competes withs such companies as Oracle and Salesforce.

At midday Thursday, the share price for Pegasystems’ stock on the Nasdaq exchange was $25.48, up 25 cents from its Wednesday close, but toward the bottom of its 52-week range of $22.51 to $40.67.