Among 16 efficacy evaluable pts, two (pleomorphic xanthoastrocytoma and glioblastoma) had a partial response (PR) and eight had stable disease (SD) as their best response...ABM-1310 at the currently tested doses up to 200 mg bid, either alone or in combination with cobimetinib, was generally well tolerated, with no new safety signals. Preliminary efficacy data demonstrate favorable activity of ABM-1310 in pts with BRAFv600-mutated solid tumors, including primary CNS tumors, and pts previously refractory to other BRAF/MEK inhibitors and I/O therapies.