exhibit 10. 21 addendum 1 to intellectual property license and transfer agreement parties : stichting symbid ip foundation and symbid holding b. v. 5 december 2013 executed version contents 1. right to grant sublicenses 1 2. existing sublicenses 1 3. miscellaneous 1 4. governing law and jurisdiction 1 schedules the undersigned : i. stichting symbid ip foundation, a foundation ( stichting ), incorporated under the laws of the netherlands with its registered seat in rotterdam, the netherlands, having its business address at van vollenhovenstraat 56 a 03, 3016bk rotterdam, the netherlands, registered in the trade register of the chamber of commerce under number 58919902 ( " symbid foundation " ) ; and ii. symbid holding b. v., a private company with limited liability ( besloten vennootschap met beperkte aansprakelijkheid ), incorporated under the laws of the netherlands with its registered seat in rotterdam, the netherlands, having its business address at van vollenhovenstraat 56 a 03, 3016bk rotterdam, the netherlands, registered in the trade register of the chamber of commerce under number 58921575 ( " symbid holding " ) ; recitals : a. symbid foundation and symbid holding entered into an intellectual property license and transfer agreement dated 16 october 2013 ( " agreement " ) ; b. pursuant to article 3 of the agreement, symbid holding is entitled to grant sublicenses to use certain intellectual property rights and know - how to affiliates ( as defined in the agreement ) ; c. symbid holding has entered into an intellectual property sublicense and transfer agreement ( " sublicense agreement " ) with symbid b. v. ( " symbid bv " ) in accordance with article 3 of the agreement ; d. symbid bv has granted various licenses to use certain intellectual property rights and know - how to parties other than affiliates, as specified in schedule 1 ( " third party sublicenses " ) ; e. symbid foundation and symbid holding wish to amend the agreement ( i ) to enable symbid holding to also grant the sublicenses as referred to in clause b above to parties other than affiliates and ( ii ) to confirm symbid foundation