Lmsys Corp
Donations deductibleLmsys Corp's network
5 people1 organisationi5 people and 1 organisation on this map.The large node is the subject of this page. Solid lines are what the register itself records (5). Violet dotted lines (1) are likely: the same full name sits on the current board of another organisation in the same register and region. Form 990 filings give names without a person identifier; SEC insider filings carry a CIK. It may be a different person.The board
5 listediTime on the board is observed from the annual filings: the IRS files no appointment date, so the bar counts years from the first filing the person appears on - a lower bound, not a filed start date. Names are exactly as filed. The IRS publishes no person identifier, so this edition does not yet link a person across organisations in the tables. The network map shows same-name matches as likely links only, never as confirmed.Time served and departures are observed across annual filings. Observed time served is a lower bound - a member may have joined before the first year on record. The organisation reported 5 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.| Name | Role as filed | Since | On the board |
|---|---|---|---|
| Clark Barrett | Director | 2025 | 1 yr |
| Jerry Yuan Zhou | Director | 2025 | 1 yr |
| Lianmin Zheng | Vice President & Secretary | 2025 | 1 yr |
| Tiancheng Xie | Treasurer | 2025 | 1 yr |
| Ying Sheng | Prsident | 2025 | 1 yr |
Under 5 years5 to 6 years6 years or more
Pay and hours
year to 31 December 2025iFrom Part VII of the Form 990: compensation reported for each officer, director, trustee, key employee and highest-paid staff member, and the average hours a week they report. Most board members are unpaid; a blank means nothing was reported. Pay from related organisations is shown separately.| Name | Title as filed | Hours a week | Pay from the organisation | Related organisations | Other |
|---|---|---|---|---|---|
| Ying Sheng | Prsident | 2 | $0 | ||
| Lianmin Zheng | Vice President & Secretary | 1 | $0 | ||
| Tiancheng Xie | Treasurer | 0.5 | $0 | ||
| Jerry Yuan Zhou | Director | 1 | $0 | ||
| Clark Barrett | Director | 0.1 | $0 |
No pay was reported for anyone in Part VII on this return.
About
- Legal name
- Lmsys Corp
- EIN
- 994817542
- Address
- 2108 N St Ste N, Sacramento, CA, 95816-5712
- State
- California
- 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. (as filed on the Form 990)
- Activity (NTEE)
- U41 Science and technology research
- IRS classification
- 501(c)03 (tax-exempt under section 501(c)(3) where shown)
- Classified purpose
- Science & Technology
- Size band
- 5 (IRS master file code)
- Formed
- 2024
- Principal officer
- Ying Sheng (as named on the Form 990)
- IRS ruling date
- 1 September 2024
- Status
- Code 01 (unconditional exemption)
- Form 990 filings on record
- 1, latest 2025
- IRS Publication 78
- PC (contributions deductible)
Most connected
Longest observed on the filings
≥1years on the filingsClark Barrett
≥1years on the filingsJerry Yuan Zhou
≥1years on the filingsLianmin Zheng
≥1years on the filingsTiancheng Xie
Latest return
year to 31 December 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 December 2025. US dollars, as filed.- Total assets
- $687k
- Total liabilities
- $0
- Net assets or fund balances
- $687k
- Contributions and grants received
- $889k
- Program service revenue
- $0
- Employees
- 0
- Volunteers
- 5