organization,segment,sector,country,plan,seats,seats_label,seat_basis,date,source_type,source_url,verified,notes
PwC,Business,Professional services,US/UK,Enterprise,100000,"100,000+ licences (75K US, 26K UK)",licences,2024-05-29,independent news,https://techcrunch.com/2024/05/29/openai-signs-on-100k-pwc-workers-to-its-chatgpt-enterprise-tier-as-the-consultant-becomes-its-first-resale-partner/,yes,Also first ChatGPT Enterprise reseller; US/UK split from WSJ/CNBC
BBVA,Business,Financial services,Spain,Enterprise,100000,"~100,000 using (target 120,000)",using,2026-06-11,OpenAI,https://openai.com/index/bbva/,yes,"Re-opened 2026-11-12: page says ~100,000 (and ""more than 100,000"") employees use ChatGPT Enterprise; started with 3,000 employees in 2024"
Commonwealth Bank of Australia,Business,Financial services,Australia,Enterprise,50000,"nearly 50,000 employees",access,2025-12-09,OpenAI,https://openai.com/index/commonwealth-bank-of-australia/,yes,"Re-opened 2026-11-12: rollout across nearly 50,000 employees"
MUFG (Mitsubishi UFJ Bank),Business,Financial services,Japan,Enterprise,35000,"~35,000 employees",access,2026-07-07,OpenAI,https://openai.com/index/mufg/,yes,"Re-opened 2026-11-12: phased rollout began 2026 to ~35,000 Mitsubishi UFJ Bank employees"
Banco Santander,Business,Financial services,Spain,Enterprise,15000,"nearly 15,000 (target 30,000 by end-2025)",access,2025-08-12,customer,https://www.santander.com/en/stories/santander-data-ai-first-strategy-accelerates-through-openai-collaboration,yes,"30,000 = ~15% of workforce"
Philips,Business,Healthcare / medtech,Netherlands,Enterprise,70000,"70,000 employees in AI-literacy rollout",access,2025-11-13,OpenAI,https://openai.com/index/philips/,partial,"Story frames 70,000 as the workforce in scope; licence count not stated separately"
Uber,Business,Technology / mobility,US,Enterprise,30000,"30,000+ (ChatGPT Work inside Enterprise)",access,2026-10-22,OpenAI,https://openai.com/index/uber-chatgpt-work-rollout,yes,"Re-opened 2026-11-12: ChatGPT Work within ChatGPT Enterprise to 30,000+ employees; 1,000-person pilot"
NOV,Business,Energy / industrial,US,Enterprise,25000,"25,000+ employees",access,2025-06-04,customer,https://www.nov.com/news/nov-rolls-out-chatgpt-enterprise-to-advance-ai-driven-innovation,yes,
The AA,Business,Consumer services,UK,Enterprise,1500,"1,500 licences",licences,2025-12-01,customer,https://www.theaa.com/about-us/newsroom/aa-collaboration-with-open-ai,yes,Non-customer-facing roles
Samsung Electronics,Business,Electronics / manufacturing,South Korea,Enterprise + Codex,,not disclosed (all Korea staff + global DX division),access,2026-06-21,OpenAI,https://openai.com/index/samsung-electronics-chatgpt-codex-deployment/,yes,"OpenAI: ""one of our largest to date""; third-party 270K figures are unsourced, not used"
Deutsche Telekom,Business,Telecom,Germany,Enterprise,,not disclosed (company-wide),access,2025-12-09,OpenAI,https://openai.com/index/deutsche-telekom-collaboration/,yes,"200,000-employee figure appears only in a LinkedIn post (†), not used"
Accenture,Business,Professional services,Global,Enterprise,,"""tens of thousands""",access,2025-12-01,independent news,https://www.channelnewsasia.com/business/accenture-ties-up-openai-equip-thousands-its-employees-chatgpt-5517066,yes,Reuters via CNA; re-opened 2026-11-12: tens of thousands of IT professionals
Coles Group,Business,Retail,Australia,Enterprise,,not disclosed (corporate staff; full rollout Feb 2026),access,2025-10-30,independent news,https://www.itnews.com.au/news/coles-offers-chatgpt-enterprise-to-corporate-staff-621416,yes,Re-opened 2026-11-12
Moderna,Business,Biotech,US,Enterprise,,"""thousands of employees""; 750+ GPTs",access,2024-04-24,OpenAI,https://openai.com/customer-stories/moderna,yes,Re-opened 2026-11-12: thousands of employees; 750 GPTs within two months
Klarna,Business,Fintech,Sweden,Enterprise,,not disclosed (all employees),access,2024,OpenAI,https://openai.com/customer-stories/klarna,yes,Re-opened 2026-11-12: ChatGPT Enterprise available to all employees
Amgen,Business,Biotech,US,Enterprise,,not disclosed (scaled company-wide),access,2025-08-07,customer,https://www.amgen.com/stories/2025/08/generative-ai-tools-support-amgens-mission-to-serve-patients,yes,"Re-opened 2026-11-12: early adopter, access scaled across the company"
Heimstaden,Business,Real estate,Sweden,Enterprise + Codex,,not disclosed (50% of employees using within 2-3 months),access,2026-11-03,OpenAI,https://openai.com/index/heimstaden/,yes,"Re-sourced 2026-11-12 to OpenAI story (deployment confirmed, no headcount). Earlier 2,400 figure (emergent.sh) unconfirmed and dropped"
UK Ministry of Justice,Government,Government,UK,Enterprise,2500,"2,500 civil servants",licences,2025-10-23,independent news,https://www.theregister.com/software/2025/10/24/uk-ministry-of-justice-signs-up-to-chatgpt-enterprise/1058624,yes,First user of UK data residency
Commonwealth of Pennsylvania,Government,Government,US,Enterprise,721,721 users at $25/user/mo,licences,2026-08-10,independent news,https://www.inquirer.com/politics/pennsylvania/pennsylvania-state-government-employees-ai-tools-protections-20260810.html,yes,Grew from 175-person 2024 pilot; ~$216K/yr
Commonwealth of Massachusetts,Government,Government,US,Enterprise,40000,"nearly 40,000 executive-branch staff (phased)",access,2026-02-13,customer,https://www.mass.gov/news/governor-healey-announces-massachusetts-to-become-first-state-to-deploy-chatgpt-across-executive-branch,yes,"Re-opened 2026-11-12: nearly 40,000 executive-branch employees, phased. Price: BAFO $13 -> $7 by volume; Boston Globe $13 -> $9"
California State University,Education,Higher education,US,Edu,523000,"460,000+ students + 63,000+ staff",access,2025-02-04,OpenAI,https://openai.com/index/openai-and-the-csu-system/,yes,"~250,000 accounts activated by spring 2026 (GovTech/SFGate); renewed 3 yrs at $13M/yr"
Indiana University,Education,Higher education,US,Edu,120000,"120,000 students, faculty, staff",access,2025-08-28,independent news,https://www.wrtv.com/news/education/iu-launches-massive-chatgpt-edu-rollout-for-120-000-students-and-faculty,yes,"""second largest ChatGPT Edu rollout"""
UNSW Sydney,Education,Higher education,Australia,Edu,80000,"80,000+ students and staff (staged)",target,2026-11-05,OpenAI,https://openai.com/index/australian-universities-ai-native-graduates/,yes,Re-opened 2026-11-12; page dated Nov 5 2026
La Trobe University,Education,Higher education,Australia,Edu,3500,"3,500 staff now; 45,000 by Q1 2027",access,2026-11-05,OpenAI,https://openai.com/index/australian-universities-ai-native-graduates/,yes,"Charted at current 3,500; page dated Nov 5 2026"
Arizona State University,Education,Higher education,US,Edu,,"all students/staff eligible; ~16,400 activated by late Nov 2025",access,2025-09-15,customer,https://tech.asu.edu/features/asu-and-openai-expand-collaboration-scaling-ai,yes,"Activation: ~10,000 students + 6,400 employees (Business Times/Bloomberg, Dec 2025)"
University of Oxford,Education,Higher education,UK,Edu,,not disclosed (all staff and students),access,2025-09-19,customer,https://www.ox.ac.uk/news/2025-09-19-oxford-becomes-first-uk-university-offer-chatgpt-edu-all-staff-and-students,yes,After ~750-person pilot
Duke University,Education,Higher education,US,Edu,,not disclosed (Edu Standard for all),access,2026-07-08,customer,https://oit.duke.edu/news/chatgpt-edu-now-available-no-cost-duke-university-community,yes,Standard tier excludes credit-based features
University of Colorado system,Education,Higher education,US,Edu,,not disclosed (all four campuses),access,2026,customer,https://www.colorado.edu/ai/chatgpt-cu-boulder,yes,Student access delayed to Aug 14 2026 at faculty request
Estonia (secondary schools),Education,K-12 / national,Estonia,Edu,24600,"20,000 students + 4,600 teachers",access,2026-05-20,OpenAI,https://openai.com/index/the-next-phase-of-education-for-countries/,yes,Re-opened 2026-11-12; page dated May 20 2026
Kazakhstan (education system),Education,K-12 + higher ed / national,Kazakhstan,Edu,165000,"165,000 free licences",licences,2026-01-21,independent news,https://dknews.kz/en/articles-in-english/381588-chatgpt-edu-to-be-introduced-in-kazakhstan-s-schools,yes,"Privately funded, per dknews"
"LG CNS (reseller, aggregate)",Reseller,Reseller channel,South Korea,Enterprise,30000,"~30,000 client-company employees",using,2026-10-22,independent news,https://en.edaily.co.kr/news/eda202610225881/,yes,Aggregate across many customers; excluded from charts