This study is researching an investigational drug called fianlimab (also called REGN3767) with two other medications called cemiplimab and chemotherapy, individually called a "study drug" or collectively called "study drugs". 'Investigational' means that the study drug is not approved for use outside of this study by any Health Authority. Examples of chemotherapy drugs include the following: Paclitaxel plus carboplatin, and Pemetrexed plus cisplatin. The study is being conducted in patients who have advanced non-small cell lung cancer (NSCLC). The aim of the study is to see how effective the combination of fianlimab, cemiplimab, and chemotherapy is for treating advanced NSCLC, in comparison with cemiplimab and chemotherapy. The study is looking at several other research questions, including: * What side effects may happen from taking the study drugs * How much of each study drug is in your blood at different times * Whether the body makes antibodies against the study drugs (which could make the drug less effective or could lead to side effects) * How administering the study drugs might improve your quality of life
Phase 2 trials begin testing efficacy in a larger patient group (100–300). This is often where biotech binary events occur — positive Phase 2 data can significantly advance a company's pipeline narrative, while failures can be terminal for a program.
Phase 3 trials are pivotal studies with large patient populations (hundreds to thousands) designed to prove efficacy and safety for FDA submission. A successful Phase 3 readout is typically the last major hurdle before a New Drug Application (NDA) or BLA filing.
Enrollment is complete. The trial is in its follow-up or data collection phase — a readout may occur on or near the primary completion date.
Regeneron Pharmaceuticals (REGN) is the sponsoring company for this trial. BiotechSign currently grades this company D (47/100) based on composite catalyst signals across its full pipeline. This trial is one data point in that overall catalyst picture.