Vociprotafib (RMC-4630) is an orally active, selective and potent phosphatase SHP2 inhibitor, which blocks activation of the RAS-RAF-MEK-ERK signaling pathway with antitumor activity. Vociprotafib accelerates the time to, and increases the magnitude of, tumor regressions in Osimertinib-sensitive EGFR-mutant tumors of mice.