A Study of Amivantamab Alone or in Addition to Other Treatment Agents in Participants With Head and Neck Cancer

Inclusion Criteria: * Cohorts 1 to 5: Have histologically or cytologically confirmed recurrent/metastatic head and neck squamous cell carcinoma (R/M HNSCC) that is considered incurable by local therapies or for Cohort 6: have histologically or cytologically confirmed locally advanced (L/A) HNSCC that is considered curable by surgery Acceptable prior lines of therapy will be determined according to specific cohort 1, 2, 3A and 3B: (a) The eligible primary tumor locations are the oropharynx, oral cavity, hypopharynx, or larynx; (b) Any known p16 status of tumor must be negative (Note: All participants with an oropharyngeal tumor must have results of p16 status, per local testing); (c) Participants must provide local testing results of programmed cell death ligand 1 (PD-L1) status, if available; Cohort 4: (d) Patients must have primary tumor location in oropharynx. Unknown primary tumors are not included (e) Primary tumor must be HPV-positive, confirmed by positive p16 test or high-risk human papillomavirus (HPV) in-situ hybridization (ISH) in tissue (current or archival) (f) Participants must provide local testing results of PD-L1 status, if available; Cohort 5 (g) The eligible primary tumor locations are the oropharynx, oral cavity, hypopharynx, or larynx; (h) HPV status must be known (either positive or negative) for patients with primary tumor location in oropharynx with p16 test or high-risk HPV ISH in tissue; (i) Participants must provide local testing results of PD-L1 st…