{"schema_version":"alpha-profile-public-v1","slug":"stephen-mayo-ph-d","canonical_url":"https://registry.alpha.ac/people/stephen-mayo-ph-d","as_of":"2026-09-21T18:13:19.954505+00:00","published_at":"2026-09-02T02:37:23.95993+00:00","last_reviewed_at":"2026-05-15T20:51:19.368+00:00","identity":{"display_name":"Stephen Mayo, Ph.D.","headshot_url":null,"headshot_media":null,"profile_kind":"director","role_tags":["director"],"current_role":{"company_name":"Allogene Therapeutics, Inc.","company_slug":"allogene-therapeutics-inc","exchange":"NASDAQ","ticker":"ALLO","role_category":"director","title":"Director","committee":null,"is_board_chair":false,"is_independent":true,"valid_from":"2022-01-01","valid_to":null,"is_current":true,"verification_status":"confirmed","confidence":0.85,"evidence":{"source_type":"sec_proxy","source_url":"https://www.sec.gov/Archives/edgar/data/1737287/000173728725000049/allo-20250429.htm","effective_date":"2025-04-30","last_checked_at":"2026-04-24T16:17:02.001+00:00"}},"photo_match":null},"assurance":{"is_claimed":false,"status":"unverified","assurance_level":null,"method":null,"verified_at":null,"expires_at":null},"claiming":{"eligible":true,"label":"Is this you? Claim your Alpha Profile","claim_url":"https://terminal.alpha.ac/claim-profile?person=stephen-mayo-ph-d","suggest_edit_label":"Suggest an edit","suggest_edit_url":"https://terminal.alpha.ac/claim-profile?person=stephen-mayo-ph-d&mode=suggest","canonical_record_will_be_reused":true,"canonical_facts_owner_controlled":false},"presentation":{"schema_version":"alpha-profile-presentation-v1","state":"alpha_editorial","version":0,"published_at":null,"headline":null,"headline_evidence":null,"location":null,"photo":null,"cover":null,"about":["Dr. Stephen Mayo is the Bren Professor of Biology and Chemistry at Caltech and was elected to the National Academy of Sciences in 2004 for pioneering contributions in protein design. He co-founded Molecular Simulations Inc., Protabit LLC, and Xencor, Inc. He serves on boards of Sarepta Therapeutics and Merck & Co."],"links":[],"sources":[],"featured":[],"competencies":[],"board_preferences":null,"board_service":[{"organization":"Allogene Therapeutics, Inc.","organizationId":"allogene-therapeutics-inc","title":"Director","period":"2022-01-01 · current","evidenceLabel":"sec_proxy","evidenceState":"verified","sourceUrl":"https://www.sec.gov/Archives/edgar/data/1737287/000173728725000049/allo-20250429.htm"}],"experience":[],"education":[],"credentials":[],"section_order":null,"hidden_sections":[],"limitations":["Presentation fields do not alter independently verified Alpha Profile facts.","Owner-supplied résumé records retain their field-level evidence state.","Only confirmed company_person_roles with public evidence. Website governed_site_fallback rows are not invented. about/links are stored people.profile_summary/bio and linkedin_url only. Dates stay undisclosed when the role has no start_date. SoFi Bank is not SoFi Technologies."]},"presentation_authority":"confirmed_company_person_roles","roles":[{"company_name":"Allogene Therapeutics, Inc.","company_slug":"allogene-therapeutics-inc","exchange":"NASDAQ","ticker":"ALLO","role_category":"director","title":"Director","committee":null,"is_board_chair":false,"is_independent":true,"valid_from":"2022-01-01","valid_to":null,"is_current":true,"verification_status":"confirmed","confidence":0.85,"evidence":{"source_type":"sec_proxy","source_url":"https://www.sec.gov/Archives/edgar/data/1737287/000173728725000049/allo-20250429.htm","effective_date":"2025-04-30","last_checked_at":"2026-04-24T16:17:02.001+00:00"}}],"claims":[{"claim_type":"ai_ml_experience","claim_value":false,"claim_text":"Proxy extraction classified AI/ML experience for Stephen Mayo, Ph.D. as false.","claim_state":"verified","valid_from":null,"valid_to":null,"confidence":0.72,"source_tier":3,"verification_status":"confirmed","last_reviewed_at":"2026-05-15T20:51:19.555112+00:00","version":1,"evidence":[{"source_name":"SEC EDGAR","document_title":"ALLO DEF 14A director slate","source_type":"sec_filing","source_tier":3,"source_url":"https://www.sec.gov/Archives/edgar/data/1737287/000173728725000049/allo-20250429.htm","published_at":"2025-04-30T00:00:00+00:00","last_checked_at":"2026-05-15T20:51:19.443682+00:00","relation":"supports","excerpt_locator":null}]},{"claim_type":"board_role","claim_value":"Director","claim_text":"Stephen Mayo, Ph.D. currently serves as Director at Allogene Therapeutics, Inc..","claim_state":"verified","valid_from":"2025-04-30","valid_to":null,"confidence":0.92,"source_tier":3,"verification_status":"confirmed","last_reviewed_at":"2026-05-15T20:51:19.516973+00:00","version":1,"evidence":[{"source_name":"SEC EDGAR","document_title":"ALLO DEF 14A director slate","source_type":"sec_filing","source_tier":3,"source_url":"https://www.sec.gov/Archives/edgar/data/1737287/000173728725000049/allo-20250429.htm","published_at":"2025-04-30T00:00:00+00:00","last_checked_at":"2026-05-15T20:51:19.443682+00:00","relation":"supports","excerpt_locator":null}]},{"claim_type":"committee_assignments","claim_value":["Audit","Research and Development"],"claim_text":"Stephen Mayo, Ph.D. serves on Audit, Research and Development.","claim_state":"verified","valid_from":"2025-04-30","valid_to":null,"confidence":0.88,"source_tier":3,"verification_status":"confirmed","last_reviewed_at":"2026-05-15T20:51:19.53724+00:00","version":1,"evidence":[{"source_name":"SEC EDGAR","document_title":"ALLO DEF 14A director slate","source_type":"sec_filing","source_tier":3,"source_url":"https://www.sec.gov/Archives/edgar/data/1737287/000173728725000049/allo-20250429.htm","published_at":"2025-04-30T00:00:00+00:00","last_checked_at":"2026-05-15T20:51:19.443682+00:00","relation":"supports","excerpt_locator":null}]},{"claim_type":"cybersecurity_experience","claim_value":false,"claim_text":"Proxy extraction classified cybersecurity experience for Stephen Mayo, Ph.D. as false.","claim_state":"verified","valid_from":null,"valid_to":null,"confidence":0.72,"source_tier":3,"verification_status":"confirmed","last_reviewed_at":"2026-05-15T20:51:19.598448+00:00","version":1,"evidence":[{"source_name":"SEC EDGAR","document_title":"ALLO DEF 14A director slate","source_type":"sec_filing","source_tier":3,"source_url":"https://www.sec.gov/Archives/edgar/data/1737287/000173728725000049/allo-20250429.htm","published_at":"2025-04-30T00:00:00+00:00","last_checked_at":"2026-05-15T20:51:19.443682+00:00","relation":"supports","excerpt_locator":null}]},{"claim_type":"technology_background","claim_value":true,"claim_text":"Proxy extraction classified technology background for Stephen Mayo, Ph.D. as true.","claim_state":"verified","valid_from":null,"valid_to":null,"confidence":0.72,"source_tier":3,"verification_status":"confirmed","last_reviewed_at":"2026-05-15T20:51:19.573062+00:00","version":1,"evidence":[{"source_name":"SEC EDGAR","document_title":"ALLO DEF 14A director slate","source_type":"sec_filing","source_tier":3,"source_url":"https://www.sec.gov/Archives/edgar/data/1737287/000173728725000049/allo-20250429.htm","published_at":"2025-04-30T00:00:00+00:00","last_checked_at":"2026-05-15T20:51:19.443682+00:00","relation":"supports","excerpt_locator":null}]},{"subject":"alpha:person:stephen-mayo-ph-d","claim_type":"board_service","claim_value":{"tags":[],"title":"Director","period":"2022-01-01 · current","organization":"Allogene Therapeutics, Inc.","organization_id":"allogene-therapeutics-inc"},"claim_text":"Director at Allogene Therapeutics, Inc. (2022-01-01 · current)","valid_from":null,"valid_to":null,"verification_status":"confirmed","date_precision":"period_text_only","evidence":[{"source_url":"https://www.sec.gov/Archives/edgar/data/1737287/000173728725000049/allo-20250429.htm","label":"sec_proxy","evidence_state":"verified"}],"claim_state":"confirmed","version":1}],"network":{"schema_version":"alpha-profile-network-public-v1","relationships":[],"relationship_pathfinding":false,"authentication_prompt":"Sign in to see how you're connected.","limitations":["Representative factual associations only.","Shared contexts do not assert personal acquaintance.","Anonymous graph traversal is not available."]},"permissions":{"classification":"open_public_projection","public_retrieval":true,"agent_retrieval":true,"redistribution":false,"model_training":false,"relationship_pathfinding":false,"direct_contact":false},"limitations":["Only permissioned public claims and evidence are included.","Absence of a claim is not evidence that the underlying fact is false.","Public retrieval does not grant model-training or redistribution rights.","Private relationships and Council activity are excluded."],"structured_data":{"@context":"https://schema.org","@type":"ProfilePage","@id":"https://registry.alpha.ac/people/stephen-mayo-ph-d#profile","url":"https://registry.alpha.ac/people/stephen-mayo-ph-d","dateModified":"2026-05-15T20:51:19.368+00:00","mainEntity":{"@type":"Person","@id":"https://registry.alpha.ac/people/stephen-mayo-ph-d#person","name":"Stephen Mayo, Ph.D.","url":"https://registry.alpha.ac/people/stephen-mayo-ph-d","jobTitle":"Director","worksFor":{"@type":"Organization","name":"Allogene Therapeutics, Inc.","tickerSymbol":"NASDAQ: ALLO"},"affiliation":[{"@type":"OrganizationRole","roleName":"Director","startDate":"2022-01-01","memberOf":{"@type":"Organization","name":"Allogene Therapeutics, Inc.","url":"https://registry.alpha.ac/companies/allogene-therapeutics-inc","tickerSymbol":"NASDAQ: ALLO"}}]},"isBasedOn":[{"@type":"CreativeWork","url":"https://www.sec.gov/Archives/edgar/data/1737287/000173728725000049/allo-20250429.htm","name":"ALLO DEF 14A director slate"}],"mainEntityOfPage":"https://registry.alpha.ac/people/stephen-mayo-ph-d"},"trust":{"schema_version":"alpha-profile-trust-v1","verification":{"schema_version":"alpha-verification-states-v1","state":"source_reported","identity_ownership":"unclaimed","assurance_level":null,"claim_state_counts":{"source_reported":7,"corroborated":0,"alpha_verified":0,"disputed":0,"superseded":0},"derivation":"claim_states+identity_ownership","summary":"Published claims are reported by public sources; none is Alpha verified. Profile ownership is unclaimed."},"aggregation":{"schema_version":"alpha-claim-aggregation-v1","published_claim_count":7,"under_review_claim_count":0,"owner_supplied_claim_count":0,"evidence_record_count":3,"distinct_source_count":1,"conflicts":[],"conflict_count":0,"headline_conflict_count":0,"internal_review_conflict_count":0,"contradiction_types":[],"headline_conflict_types":[],"verification":{"schema_version":"alpha-verification-states-v1","state":"source_reported","identity_ownership":"unclaimed","assurance_level":null,"claim_state_counts":{"source_reported":7,"corroborated":0,"alpha_verified":0,"disputed":0,"superseded":0},"derivation":"claim_states+identity_ownership","summary":"Published claims are reported by public sources; none is Alpha verified. Profile ownership is unclaimed."},"coverage":{"schema_version":"alpha-coverage-metric-v1","published_claims":7,"corroborated_claims":0,"sources":3,"distinct_sources":1,"role_claims":1,"last_reviewed_at":"2026-05-15T20:51:19.368+00:00","observed_at":"2026-09-21T18:13:19.954505+00:00","freshness_days":129}},"rights":{"public_retrieval":"allowed","agent_retrieval":"allowed","redistribution":"not_granted","model_training":"not_granted","commercial_use":"not_specified","relationship_pathfinding":"not_granted","direct_contact":"not_granted"}},"projection":{"schema_version":"alpha-profile-projection-v5","entity":{"kind":"person","slug":"stephen-mayo-ph-d","canonical_url":"https://registry.alpha.ac/people/stephen-mayo-ph-d"},"publication":{"published_at":"2026-09-02T02:37:23.95993+00:00","last_reviewed_at":"2026-05-15T20:51:19.368+00:00","as_of":"2026-09-21T18:13:19.954505+00:00"},"representations":{"html":{"href":"https://registry.alpha.ac/people/stephen-mayo-ph-d","media_type":"text/html"},"json":{"href":"https://registry.alpha.ac/api/public/profiles/stephen-mayo-ph-d","media_type":"application/json"},"markdown":{"href":"https://registry.alpha.ac/people/stephen-mayo-ph-d.md","media_type":"text/markdown"},"structured_data":{"embedded":true,"media_type":"application/ld+json"},"share_image":null},"permissions":{"public_retrieval":true,"agent_retrieval":true,"redistribution":false,"model_training":false,"relationship_pathfinding":false,"direct_contact":false}}}