The company said today (July 12) that it’s partnering with three travel management companies—American Express Global Business Travel, BCD Travel, and Carlson Wagonlit Travel—to give their clients a chance to book on Airbnb.

AmEx GBT, whose clients include IBM, McKinsey, and Microsoft, reported $30 billion in 2015 sales. It is adding Airbnb as a “preferred supplier,” meaning Airbnb will be able to offer negotiated rates and business expenditure tracking. Carlson Wagonlit Travel handled $24.2 billion in sales in 2015, with 92% coming from corporate bookings. BCD did $23.8 billion.

The coveted business customer is within reach for Airbnb. Note that Airbnb is already offering more room nights than any other legacy hotel provider (including the combined Marriott and SPG corporation).