Sorry, but disclosure isn't voluntary - I am going to assume you didn't go to EDGAR and read all of the documents - Bignitz has signed the documents but for purchaser it is blank - there isn't a name or signature.
From the 8-K:
Exhibit 10.1: Form of Securities Purchase Agreement dated April 30, 2018, by and between the Registrant and the Purchaser.
On EDGAR in Exhibit 10.1 - the Purchaser isn't named.