2026-03-27T16:03:14-05:00 2025-12-31 992125480 MAY Consulting PLLC 371 NE GILMAN BLVD STE160 ISSAQUAH WA 98027 990 2025-01-01 994817542 LMSYS Corp LMSY 2108 N ST STE N Sacramento CA 95816 Ying Sheng President 4259962090 2026-03-27 1 MEIYI MAY CHEN P01696711 4259962090 2025 2025-03-06 01:10:19Z X Ying Sheng 2108 N ST STE N Sacramento CA 95816 889293 0 X lmsys.org X 2024 CA Advance open AI research through open-source models, datasets, and tools promoting transparency. 5 3 0 5 0 0 0 889147 0 0 0 146 0 0 0 889293 0 0 0 0 0 20201 0 0 0 0 182307 0 202508 0 686785 0 686785 0 0 0 686785 LMSYS Corp advances open research and education in large-scale model systems by developing and sharing open-source models, datasets, systems, and evaluation tools that promote transparency, accessibility, and collaboration across the global research community. 0 0 145523 Open Research and Model Development: LMSYS Corp leads collaborative efforts in developing open large language models and related systems. Through initiatives such as Vicuna, Chatbot Arena, and LMSYS Chatbot Leaderboard, we support open benchmarking, transparency, and knowledge sharing across the AI research community. These programs provide critical infrastructure for reproducible AI research and foster innovation through open collaboration and comparative evaluation. 48508 AI Benchmarking and Transparency Initiatives: The Organization develops and maintains public evaluation platforms that allow researchers and the public to test and compare AI models in real time. By operating open, accessible benchmarking environments, LMSYS Corp promotes fairness, reproducibility, and accountability in AI performance measurement. These initiatives help ensure that AI development serves both academic progress and societal benefit. 1800 Educational Outreach and Community Engagement: LMSYS Corp hosts workshops, tutorials, and educational events to bridge the gap between cutting-edge AI research and broader public understanding. We engage with universities, research groups, and open-source communities to support hands-on learning opportunities and promote best practices in responsible AI development. Our outreach activities foster global participation and empower individuals to contribute meaningfully to the open AI ecosystem. 195831 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 X 5 3 1 0 1 0 0 0 0 1 1 0 0 1 1 1 1 0 0 0 0 0 CA X MAY Consulting PLLC 4259962090 371 NE Gilman Blvd Suite 160 Issaquah WA 98027 Ying Sheng Prsident 2.00 X X 0 0 0 Lianmin Zheng Vice President & Secretary 1.00 X X 0 0 0 Tiancheng Xie Treasurer 0.50 X X 0 0 0 Jerry Yuan Zhou Director 1.00 X 0 0 0 Clark Barrett Director 0.10 X 0 0 0 0 0 0 0 0 0 0 0 889147 590947 889147 146 146 889293 0 0 146 20201 20201 6000 6000 677 677 1570 1570 118189 118189 Software & LLM Dev 55641 55641 Training 230 230 202508 195831 6677 0 0 121311 0 92716 590947 118189 0 472758 0 686785 0 0 X 0 686785 0 686785 0 686785 686785 0 X 0 0 0 X 0 889147 889147 889147 889147 0 0 0 889147 0 146 146 146 146 889293 889293 X RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED 590947 118189 472758 472758 X AI Servers 2 590947 Cost Basis 0 0 0 0 Part I, Column (b): The number represents the quantity of items contributed. Line 29 The organization received a noncash contribution of new AI servers from NVIDIA to support its research activities. The donor provided a shipping invoice for informational purposes. The organization did not receive Form 8283 or a qualified appraisal and therefore did not complete or sign Part IV, Donee Acknowledgment. The organization informed the donor that such documentation is generally required to substantiate a charitable deduction for noncash contributions. Form 990, Part VI, Section A, line 2 President Ying Sheng and Secretary Lianmin Zheng are married. Their relationship is disclosed in accordance with Form 990 reporting requirements. The organization maintains a conflict of interest policy and follows procedures to ensure that all decisions are made in the best interest of the organization and are free from undue influence. Form 990, Part VI, Section A, line 4 The organization adopted amended and restated bylaws and implemented a formal conflict of interest policy during the year to strengthen governance, internal controls, and regulatory compliance in response to increased funding and expanded activities. These actions were reviewed and approved by the Board of Directors and documented in the official board minutes. Form 990, Part VI, Section B, line 11b The Form 990 is reviewed and approved by the board members before filing. Form 990, Part VI, Section B, line 12c WHEN DECISIONS ARE MADE IF THERE IS A CONFLICT OF INTEREST, IT IS DISCUSSED AT THE BOARD MEETING AND DOCUMENTED IN THE MINUTES. Form 990, Part VI, Section C, line 19 Documents are available upon request.