"For the last six months [ RPi team has ] been working closely with Microsoft to bring the forthcoming Windows 10 to Raspberry Pi 2. Microsoft will have much more to share over the coming months. The Raspberry Pi 2-compatible version of Windows 10 will be available free of charge to makers.
Visit WindowsOnDevices.com today to join the Windows Developer Program for IoT and receive updates as they become available."
No, it's just Broadcom and the Raspberry Pi engineering team that made the product happen. At the point we knew Pi 2 would be happening, the conversation with MS started and they started work porting Windows to it - with a little help from our engineers.