X0306 4 2018-11-09 0 0001438533 Retrophin, Inc. RTRX 0001681098 McFarlane Neil F. C/O RETROPHIN, INC. 3721 VALLEY CENTRE DR., SUITE 200 SAN DIEGO CA 92130 0 1 0 0 Chief Operating Officer Common Stock 2018-11-09 4 A 0 10000 0.00 A 38476 D On August 15, 2016, the reporting person was granted performance restricted stock units (PRSUs) covering 30,000 shares of the Issuer's common stock, which vest upon the satisfaction of certain performance criteria. On November 9, 2018, a portion of the PRSUs vested upon the Issuer's confirmation that the US Food and Drug Administration had accepted for review a New Drug Application filed by the Issuer's partner. Includes 528 shares of the Issuer's common stock acquired by the reporting person on May 31, 2018 pursuant to an employee stock purchase program. /s/ Elizabeth E. Reed, Attorney-in-Fact 2018-11-14