This study is to evaluate the safety, tolerability, and PK profiles of Elironrasib and Daraxonrasib as monotherapies and combination therapy in patients with KRAS G12C-mutated solid tumors.

This is an open-label, multicenter, Phase 1b/2 study evaluating elironrasib and daraxonrasib, administered as monotherapy and in combination, in patients with advanced KRAS G12C-mutated solid tumors to determine the maximum tolerated dose (MTD), identify the recommended Phase 2 dose and schedule (RP2DS), and preliminarily assess antitumor activity.

The study includes a Phase 1b dose escalation and expansion of combination therapy, followed by a Phase 2 evaluation of the selected RP2DS as monotherapy and combination therapy to further assess safety and antitumor activity.

Inclusion Criteria:

• 18 years of age

• Histology: pathologically documented, KRAS G12C-mutated, advanced or metastatic solid tumors not amendable to curative therapy

  1. Phase 1b Dose Escalation: solid tumors, previously treated
  2. Phase 1b Dose Expansion and Phase 2:

  i. NSCLC, previously treated with immunotherapy, chemotherapy, and KRAS G12C (OFF) inhibitors ii. Solid tumors, previously treated, naïve to KRAS G12C (OFF) inhibitors.

• ECOG performance status 0 or 1

• Adequate organ function

Exclusion Criteria:

• Primary central nervous system (CNS) tumors
• Active brain metastases
• Known impairment of GI function that would alter the absorption
• Major surgical procedures within 28 days or non-study related minor procedures within 7 days of treatment

None (Open Label)