This is a phase 1/2, open label study of D-1553 in combination with IN10018 to assess the safety and tolerability, identify the MTD and RP2D, evaluate the PK properties and antitumor activities in subjects with advanced or metastatic solid tumor with KRasG12C mutation

Inclusion Criteria:

• Subject with histologically proven, locally advanced, unresectable and/or metastatic solid tumor, for which no standard treatment is available or the subject is refractory to or intolerant of existing standard treatment.
• Subject has KRasG12C mutation in tumor tissue or other biospecimens (only for phase1b) containing cancer cells or DNA. Historical, local laboratory result (up to 5 years prior to this study) can be used.
• Subject has tumor type requirement as follows: advanced or metastatic solid tumors including NSCLC and CRC.
• Subject has measurable disease according to RECIST, v1.1

Exclusion Criteria:

Subject with unstable or progressive central nervous system (CNS) metastases.

• Subject with acute myocardial infarction, severe/unstable angina; or with cardiac insufficiency of New York Heart Association Functional Classification Grade 2 or above.
• Subject has corrected QT interval using Fridericia's formula (QTcF) prolongation at rest, where the mean QTc interval is > 480 msec based on triplicate measurements of electrocardiogram (ECG).
• Subject with stroke or other severe cerebrovascular diseases within 12 months before enrollment;
• Subject with interstitial lung disease or acute lung infection not yet recovered including but not limited to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection;
• Subject is pregnant or lactating.