 CytomX Therapeutics Inc. CTMX, 7.19 shares soared more than 50 in the extended session Thursday after the small biotech company announced a partnership with Moderna Inc. MRNA, -2.17 CytomX shares were last up 57 after hours, following a 7.2 rise to close the regular session at 1.79. Under the agreement, CytomX gets a 35 million up-front payment, and is eligible for up to 1.2 billion in additional payments to research and develop messenger RNA-based conditionally activated therapeutics with Moderna. 