A Study of Olomorasib (LY3537982) in Participants With Advanced Colorectal Cancer and a KRAS G12C Mutation

September 4, 2026 updated by: Eli Lilly and Company

A Phase 2, Open-Label Study to Evaluate the Safety and Efficacy of Olomorasib in Combination With Cetuximab and mFOLFOX6 in Participants With KRAS G12C-Mutant, Locally Advanced Unresectable or Metastatic Colorectal Cancer

The main purpose of this study is to evaluate how well olomorasib is tolerated and what side effects may occur when combined with other interventions in participants with Kirsten rat sarcoma viral oncogene homolog (KRAS) G12C-mutant, locally advanced colorectal cancer (CRC) that cannot be removed with surgery or has spread to other parts of the body. Blood tests will be performed to investigate how the body processes the study drug.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
50

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.
  • Name: Trial questions or participation questions: 1-877-CTLILLY (1-877-285-4559) or
  • Phone Number: 1-317-615-4559
  • Email: LillyTrials@Lilly.com

Study Contact Backup

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Histologically or cytologically confirmed colorectal cancer (CRC) with Stage III or Stage IV disease, not suitable for curative intent radical surgery or radiation therapy.
  • Must have disease with evidence of KRAS G12C mutation
  • Have measurable disease per RECIST v1.1.
  • Have an Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1.
  • Ability to swallow capsules.
  • Have adequate laboratory parameters.

  • Have not received treatment for their CRC that has spread to other parts of the body.

    • 1-2 cycles of FOLFOX prior to study enrollment will be allowed for cases where immediate treatment is clinically indicated.

Exclusion Criteria:

  • Have active inflammatory bowel disease requiring immunosuppressive medication or previous clear history of inflammatory bowel disease.
  • Have a clinically significant active malabsorption syndrome or other conditions likely to affect gastrointestinal absorption of the orally administered study treatments.
  • Have known untreated active central nervous system metastases or carcinomatous meningitis.
  • Have known additional malignancy that is progressing or has required treatment within the past 2 years.
  • Have uncontrolled, significant cardiovascular disease or cerebrovascular disease.
  • Have an active fungal, bacterial, or active, untreated viral infection.
  • Have human immunodeficiency virus (HIV) with a history of Kaposi's sarcoma or Multicentric Castleman's Disease.
  • Have known B-Raf proto-oncogene, serine/threonine kinase (BRAF) V600E gene mutation.
  • Have confirmed Microsatellite Instability-High/deficient Mismatch Repair (MSI-H/dMMR).
  • Individuals with known low or absent dihydropyrimidine dehydrogenase activity.
  • Have known positive Immunoglobulin E (IgE) antibodies against galactose-α-1,3-galactose (alpha-gal).
  • Have received adjuvant, neoadjuvant, concurrent chemoradiotherapy, or consolidation therapy if treatment was completed less than 6 months prior to enrollment.
  • Are pregnant, breastfeeding, or intend to become pregnant during the study.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Olomorasib + Cetuximab + mFOLFOX6
Olomorasib administered orally; Cetuximab, fluorouracil, leucovorin & oxaliplatin administered intravenously (IV)
Drug: Oxaliplatin
Administered IV
Drug: Cetuximab
Administered IV
Drug: 5-fluorouracil
Administered IV
Drug: Olomorasib
Administered orally
Other Names:
  • LY3537982
Drug: Leucovorin/levofolinate calcium
Administered IV

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Overall Response Rate (ORR) Per Response Evaluation Criteria in Solid Tumors (RECIST) v1.1
Time Frame: Baseline until Disease Progression (PD) or Participant Stops Study (Estimated up to 15 Months)
Baseline until Disease Progression (PD) or Participant Stops Study (Estimated up to 15 Months)
Progression-Free Survival (PFS) Per RECIST v1.1
Time Frame: Baseline to the Date of First Documented Progression of Disease or Participant Stops Study (Estimated up to 21 Months)
Baseline to the Date of First Documented Progression of Disease or Participant Stops Study (Estimated up to 21 Months)

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Time Frame
Overall Survival (OS)
Time Frame: Baseline through End of Study (Estimated up to 21 months)
Baseline through End of Study (Estimated up to 21 months)
Duration of Response (DoR)
Time Frame: Baseline up to 15 months
Baseline up to 15 months
Disease Control Rate (DCR)
Time Frame: Baseline up to 15 months
Baseline up to 15 months
Time to Response (TTR)
Time Frame: Baseline up to 15 months
Baseline up to 15 months
Pharmacokinetics (PK): Plasma Concentrations of Olomorasib (LY3537982)
Time Frame: Baseline up to 2 months
Baseline up to 2 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Eli Lilly and Company

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Call 1-877-CTLILLY (1-877-285-4559) or 1-317-615-4559 Mon - Fri 8 AM - 8 PM Eastern time (UTC/GMT - 5 hours, EST), Eli Lilly and Company

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
October 1, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
November 1, 2028

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
November 1, 2028

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
September 4, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 4, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
September 11, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 11, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 4, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
September 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 27858
  • J3M-MC-JZQN (Other Identifier: Eli Lilly and Company)
  • 2026-526138-23-00 (Ctis)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Anonymized individual patient level data will be provided in a secure access environment upon approval of a research proposal and a signed data sharing agreement.

IPD Sharing Time Frame

Data are available 6 months after the primary publication or approval of the indication studied in the US and EU, whichever is later. Data will be indefinitely available for requesting.

IPD Sharing Access Criteria

A research proposal should be approved by an independent review panel and researchers should sign a data sharing agreement.

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • CSR

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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