We would have to assume so, I don't think any of us know how it actually works. It sounds like on the 25th or 26th shares that when shares of BMSN are traded you'd receive Regen. I'm not sure what the I.O.U. the SEC mentions is, how it's tracked, or how shares are then distributed.
This is from Wikipedia, I havent dug deeper to find a FINRA or SEC resource.
For special dividends:
Your shares will be sold with a book entry sometimes called a "due bill," which denotes that though the company will pay the dividend to your account (as the shareholder of record), your account must, in turn, turn that dividend over to the buyer of your stock.