FRAMINGHAM, Mass--(BUSINESS WIRE)--Staples, Inc. (Nasdaq: SPLS) announced today that it has been named to the Dow Jones Sustainability Index for the 12th year in a row. Staples was once again recognized for its continued journey toward sustainability leadership. A leading global benchmark for corporate sustainability, the annual Dow Jones Sustainability Indices (“DJSI”), is a partnership between RobecoSAM and S&P Dow Jones Indices. RobecoSAM continuously raises the bar to identify the most