Staples to buy rival Office Depot for $6.3 billion by Fortune Editors @FortuneMagazine February 4, 2015, 7:33 AM EDT E-mail Tweet Facebook Google Plus Linkedin Share icons Staples, the No. 1 U.S. office supplier, said Wednesday it would buy its nearest rival Office Depot Inc in a $6.3 billion cash-and-stock deal. Staples SPLS said it would pay $7.25 per share in cash and 0.2188 of its shares for each Office Depot ODP share. “This is a transformational acquisition which enables Staples to provide more value to customers, and more effectively compete in a rapidly evolving competitive environment,” Ron Sargent, Staples’ chairman and chief executive officer, said in a statement. “We expect to recognize at least $1 billion of synergies as we aggressively reduce global expenses and optimize our retail footprint,” he added. “These savings will dramatically accelerate our strategic reinvention which is focused on driving growth in our delivery businesses and in categories beyond office supplies.” Staples has a market value of about $11 billion, while Office Depot has a market value of about $4.1 billion. Earlier this week, The Wall Street Journal reported the two companies were in advanced talks to merge. Last month, activist investor Starboard Value LP called for the two companies to join forces, saying a combined entity would lead to greater savings. A merger would help fend off intense competition from online retailers such as Amazon.com AMZN and big-box chains such as Wal-Mart Stores WMT that sell the same core office supplies, such as paper and ink toner, for less. The combination of the two would likely get a close look from antitrust regulators, the Journal said. Regulators nixed Staples’ attempt to buy Office Depot in 1997, citing antitrust concerns. The FTC approved Office Depot’s $976 million acquisition of OfficeMax in 2013 without the need to close stores, citing increased competition in the office supply industry. News of the deal comes at a time of seismic change in the retail business. Earlier this week, a report said the 94-year-old retailer RadioShack RSH is about to file for bankruptcy and may sell some of its stores to Amazon.com AMZN , which would use them as showcases for its hardware, as well as potential pickup and drop-off centers for online customers.