portions herein identified by [ * * * * * ] have been omitted pursuant to a request for confidential treatment under rule 24b - 2 of the securities exchange act of 1934, as amended. a complete copy of this document has been filed separately with the securities and exchange commission. confidential exhibit 10. 22 securities purchase, assignment and assumption agreement dated as of december 19, 2018 by and among intrexon corporation, ares trading s. a. and precigen, inc. portions herein identified by [ * * * * * ] have been omitted pursuant to a request for confidential treatment under rule 24b - 2 of the securities exchange act of 1934, as amended. a complete copy of this document has been filed separately with the securities and exchange commission. confidential table of contents pagearticle 1definitions1article 2assignment and assumption92. 1assignment and assumption of collaboration agreement92. 2closing10article 3financial provisions103. 1sale and issuance of intrexon shares103. 2purchase and sale of note103. 3specified car - t products royalties11article 4other agreements of the parties114. 1use of note proceeds114. 2development and commercialization of specified car - t products114. 3shares to be issued114. 4registration rights114. 4. 1registration of intrexon shares114. 4. 2registration of intrexon common stock124. 4. 3registration of precigen shares124. 4. 4registration in a precigen financing134. 4. 5other provisions applicable to registration13 ( vi ) of such issuer's determination that a post - effective amendment to the registration154. 4. 6indemnification and contribution164. 5shareholder rights plans ; anti - takeover measures194. 6precigen board designation right204. 7lock - up214. 8limitations on intrexon shares224. 9commercially reasonable efforts to amend collaboration agreement22article 5legends ; public announcements235. 1legends235. 2legend removal235. 3public announcements23article 6representations, warranties and covenants246. 1mutual representations