For those of you looking for Corporate Sponsored Venture Accelerators, I thought I'd share this list I have from a few years back. Think it's mostly current (has about 100 different programs sponsored by co's like Apple, IBM, etc. Feel free to add to the list by commenting on the document.
Hope it's helpful
https://docs.google.com/spreadsheets/d/1K7ubs6Nn47pMfG9WfxpfpCkamfU0n1vk7DlRtOuzO3k/edit?usp=sharing