Civic Intelligence

Lmsys Corp

EIN 99-4817542 • 501(c)3 • Sacramento, CA

Pub. 78 EligibleNTEE U41

Profile

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.

2108 N St Ste NSacramento, CA 95816

lmsys.org

Siviq Scores

Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.

Liabilities / Assets

33rd percentile

0.00x

Tied with the lowest-debt nonprofits in its peer group.

501(c)3 • $500k-$1M nonprofits • Source year 2025

Liabilities / Revenue

35th percentile

0.00x

Tied with the lowest-debt nonprofits in its peer group.

501(c)3 • $500k-$1M nonprofits • Source year 2025

Net Margin

96th percentile

77%

Higher net margin than 96% of similar nonprofits.

501(c)3 • $500k-$1M nonprofits • Source year 2025

Top Officer Pay

55th percentile

$0

Higher top officer pay than 55% of similar nonprofits.

Top officer pay equals 0.0% of source-year revenue.

501(c)3 • $500k-$1M nonprofits • Source year 2025

Asset Growth

Score unavailable

No value available

A valid growth rate could not be computed from the available filing history.

Annualized from 2024 to 2025

Revenue Growth

Score unavailable

No value available

A valid growth rate could not be computed from the available filing history.

Annualized from 2024 to 2025

Balance Sheet
Liabilities / Assets33rd percentile

Assets

Up

$686,785

Up $686,785 from 2024

Liabilities

$0

No earlier filing loaded for comparison.

Net Assets

Up

$686,785

Up $686,785 from 2024

Operations
Liabilities / Revenue35th percentileNet Margin96th percentile

Revenue

Up

$889,293

Up $889,293 from 2024

Expenses

$202,508

No earlier filing loaded for comparison.

Net Income

$686,785

No earlier filing loaded for comparison.

Trend Graphs

Balance Sheet Trend

Asset GrowthScore unavailable

Grouped bars show assets, liabilities, and net assets across loaded filings.

$800K$600K$400K$200K$0Assets 2024: $0Net Assets 2024: $02024Assets 2025: $686,785Liabilities 2025: $0Net Assets 2025: $686,7852025

Highlighted filing

2025

Assets$686,785
Liabilities$0
Net Assets$686,785
Open 2025 Filing

Operations Trend

Revenue GrowthScore unavailable

Revenue, expenses, and net income by year, with the latest filing highlighted.

$1.0M$500K$0Revenue 2024: $02024Revenue 2025: $889,293Expenses 2025: $202,508Net Income 2025: $686,7852025

Highlighted filing

2025

Revenue$889,293
Expenses$202,508
Net Income$686,785
Open 2025 Filing

Filings

Most recent year

2025 • Form 990Detailed filing. Detailed filing data is available for this year.

Open filing
Assets
$686,785
Liabilities
$0
Net assets
$686,785
Revenue
$889,293
Expenses
$202,508
Net income
$686,785
Balance SheetOperations
YearAssetsLiabilitiesNet AssetsRevenueExpensesNet Income
2025Detailed filing. Detailed filing data is available for this year.$6.87$0.00$6.87$8.89$2.03$6.87
2024Detailed filing. Detailed filing data is available for this year.$0.00$0.00$0.00
Latest Filing Detail
Jump To
Filing Snapshot
Filing Period
Jan 1, 2025 to Dec 31, 2025
Signed
Mar 27, 2026
Return Version
2025v4.0
Gross Receipts
$889,293
Mission and Program Overview

Mission

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.

Advance open AI research through open-source models, datasets, and tools promoting transparency.

Balance Sheet Detail
LineBeginningEndChange
Assets
Land, Buildings, and Equipment, Net$0$472,758▲ $472,758
Cash and Non-Interest-Bearing Accounts$0$121,311▲ $121,311
Savings and Temporary Cash Investments$0$92,716▲ $92,716
Total Assets$0$686,785▲ $686,785
Liabilities
Total Liabilities$0$0→ $0
Net Assets / Fund Balance
Net Assets Without Donor Restrictions$0$686,785▲ $686,785
Total Net Assets Fund Balance$0$686,785▲ $686,785
Total Liabilities and Net Assets / Fund Balance$0$686,785▲ $686,785

Asset Categories

AssetBook ValueDepreciationBasis
Other Land Buildings$472,758$118,189$590,947
Compensation and Service Providers
Top Officer Pay55th percentile

Board Members and Trustees

NameTitle
Lianmin ZhengVice President & Secretary
Clark BarrettDirector
Jerry Yuan ZhouDirector
Ying ShengPrsident
Tiancheng XieTreasurer
Revenue and Support

Revenue Composition

Contributions and Grants
$889,147
Program Service Revenue
$0
Investment Income
$146
Other Revenue
$0
All Other Contributions
$889,147
Change in Net Assets
$686,785

Noncash Contribution Practices

Property subject to holding requirements
No
Reviewed unusual noncash gifts
No
Third parties used for noncash contributions
No

Noncash Contributions

Contribution TypeContribution CountReported AmountValuation Method
Other Non Cash Contri Table2$590,947Cost Basis
Total Noncash Contributions2$590,947-
Expenses and Functional Allocation

Major Expense Lines

Line ItemAmount
Other Expenses$182,307
Salaries, Compensation, and Employee Benefits$20,201
Grants and Similar Amounts Paid$0
Professional Fundraising Fees$0
Total Fundraising Expense$0

Functional Expense Allocation

Line ItemProgramManagementFundraisingTotal
Depreciation Depletion$118,189--$118,189
Other Salaries and Wages$20,201--$20,201
Fees for Services Accounting-$6,000-$6,000
Travel$1,570--$1,570
Office Expenses-$677-$677
Other Expenses$230--$230
Total Functional Expenses$195,831$6,677$0$202,508
Fundraising, Events, and Gaming
Fundraising activities
No
Gaming activities
No
Professional fundraiser used
No

Fundraising and Gaming Totals

Line ItemAmount
Professional Fundraising Fees$0
Political and Lobbying Activity
Political campaign activity
No
Lobbying activity
No
Subject to proxy tax
No
Governance and Compliance

Governance Checklist

Compiled or reviewed by an accountant
No
Annual disclosure for covered persons
Yes
Business relationship with 35% controlled entity
No
Business relationship with family members
No
Business relationship with organization members
No
Material changes to governing documents
Yes
Compensation from other sources disclosed
No
CEO compensation reviewed
No
Other officer compensation reviewed
No
Conflict-of-interest policy
Yes
Audited financial statements prepared
No
Key decisions subject to board approval
No
Management duties delegated
No

Governance Explanations

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.”

Filing and Contact Details

Filer

Filer Name
LMSYS Corp
EIN
99-4817542
Address
2108 N ST STE N, Sacramento, CA 95816

Signing Officer

Name
Ying Sheng
Title
President
Phone
4259962090
Signed
2026-03-27
Discuss with paid preparer
Yes

Organization Details

Principal Officer
Ying Sheng
Formed
2024
Legal Domicile
CA
Voting Board Members
5
Independent Board Members
3
Employees
0
Volunteers
5

Preparer

Firm
MAY Consulting PLLC
Address
371 NE GILMAN BLVD STE160, ISSAQUAH, WA 98027
Preparer
Meiyi May Chen
Phone
4259962090
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This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.

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IRS990/Desc0Open 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.
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IRS990/Form990PartVIISectionAGrp/TitleTxt4Director
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IRS990/ProgSrvcAccomActy2Grp/Desc0AI 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.
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IRS990/ProgSrvcAccomActy3Grp/Desc0Educational 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.
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IRS990ScheduleM/SupplementalInformationDetail/ExplanationTxt1The 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.
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IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt0President 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.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt1The 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.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt2The Form 990 is reviewed and approved by the board members before filing.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt3WHEN DECISIONS ARE MADE IF THERE IS A CONFLICT OF INTEREST, IT IS DISCUSSED AT THE BOARD MEETING AND DOCUMENTED IN THE MINUTES.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt4Documents are available upon request.
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc0Form 990, Part VI, Section A, line 2
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc1Form 990, Part VI, Section A, line 4
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc2Form 990, Part VI, Section B, line 11b
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc3Form 990, Part VI, Section B, line 12c
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc4Form 990, Part VI, Section C, line 19
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IRS990/TotLiabNetAssetsFundBalanceGrp/EOYAmt0686785
IRS990/TotReportableCompRltdOrgAmt00
IRS990/TravelGrp/ProgramServicesAmt01570
IRS990/TravelGrp/TotalAmt01570
IRS990/TrnsfrExmptNonChrtblRltdOrgInd00
IRS990/TypeOfOrganizationCorpInd0X
IRS990/UnrelatedBusIncmOverLimitInd00
IRS990/UponRequestInd0X
IRS990/USAddress/AddressLine1Txt02108 N ST STE N
IRS990/USAddress/CityNm0Sacramento
IRS990/USAddress/StateAbbreviationCd0CA
IRS990/USAddress/ZIPCd095816
IRS990/VotingMembersGoverningBodyCnt05
IRS990/VotingMembersIndependentCnt03
IRS990/WebsiteAddressTxt0lmsys.org
IRS990/WhistleblowerPolicyInd00
ReturnHeader/BuildTS02025-03-06 01:10:19Z
ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd01
ReturnHeader/BusinessOfficerGrp/PersonNm0Ying Sheng
ReturnHeader/BusinessOfficerGrp/PersonTitleTxt0President
ReturnHeader/BusinessOfficerGrp/PhoneNum04259962090
ReturnHeader/BusinessOfficerGrp/SignatureDt02026-03-27
ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt0LMSYS Corp
ReturnHeader/Filer/BusinessNameControlTxt0LMSY
ReturnHeader/Filer/EIN0994817542
ReturnHeader/Filer/USAddress/AddressLine1Txt02108 N ST STE N
ReturnHeader/Filer/USAddress/CityNm0Sacramento
ReturnHeader/Filer/USAddress/StateAbbreviationCd0CA
ReturnHeader/Filer/USAddress/ZIPCd095816
ReturnHeader/PreparerFirmGrp/PreparerFirmEIN0992125480
ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt0MAY Consulting PLLC
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt0371 NE GILMAN BLVD STE160
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm0ISSAQUAH
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd0WA
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd098027
ReturnHeader/PreparerPersonGrp/PhoneNum04259962090
ReturnHeader/PreparerPersonGrp/PreparerPersonNm0MEIYI MAY CHEN
ReturnHeader/ReturnTs02026-03-27T16:03:14-05:00
ReturnHeader/ReturnTypeCd0990
ReturnHeader/TaxPeriodBeginDt02025-01-01
ReturnHeader/TaxPeriodEndDt02025-12-31
ReturnHeader/TaxYr02025

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