EntityWire/California business entity search →/MONOLITHIC POWER SYSTEMS, INC.
Employer with a benefit plan
MONOLITHIC POWER SYSTEMS, INC.
The Employer Identification Number (EIN) for MONOLITHIC POWER SYSTEMS, INC. is 77-0466789.
At a glance
- EIN
- 77-0466789 · 770466789
- Legal name
- MONOLITHIC POWER SYSTEMS, INC.
- Address on file
- 79 GREAT OAKS BOULEVARD, SAN JOSE, CA 95119
- Records show
- SEC filer; employer with a benefit plan; state registration
- Latest record
- 2026-09-05
State registration
Florida Division of Corporations (Sunbiz) bulk data · Texas Comptroller active franchise taxpayers file · records as of 2026-09-05
- Texas registration
- Active · Foreign profit corporation
- Source: Texas Comptroller · as of 2026-09-05
- Texas document number
- 0800683819
- Source: Texas Comptroller · as of 2026-09-05
- Florida registration
- Active · Foreign profit corporation
- Source: Florida registry · as of 2026-07-10
- Florida document number
- F25000004141
- Source: Florida registry · as of 2026-07-10
- Registered in Florida
- 2025-07-01
- Source: Florida registry · as of 2026-07-10
- Registered agent
- CT CORPORATION SYSTEM
- Source: Florida registry · as of 2026-07-10
SEC records
SEC EDGAR company filings · records as of 2026-09-02
- SEC CIK
- 0001280452
- Source: SEC · as of 2026-09-02
- Industry (SIC)
- Semiconductors & Related Devices (3674)
- Source: SEC · as of 2026-09-02
- State of incorporation
- DE
- Source: SEC · as of 2026-09-02
- Ticker
- MPWR
- Source: SEC · as of 2026-09-02
- Latest SEC filing
- 4 2026-09-02
- Source: SEC · as of 2026-09-02
Benefit plans
DOL Form 5500 filings (EFAST2) · records as of 2025-09-25
- Benefit plan 1, 2024 filing
- MONOLITHIC POWER SYSTEMS, INC. 401(K) SAVINGS PLAN
- Source: DOL 5500 · as of 2025-09-25
- Participants (start of year)
- 479
- Source: DOL 5500 · as of 2025-09-25
- Plan features
- ERISA 404(c) plan; Participant-directed; Profit-sharing; 401(k) feature; 401(m) matching; Automatic enrollment
- Source: DOL 5500 · as of 2025-09-25
What this record is
Public filings that carry this EIN (DOL Form 5500 filings (EFAST2), Florida Division of Corporations (Sunbiz) bulk data, SEC EDGAR company filings and Texas Comptroller active franchise taxpayers file), shown as filed. Nothing is scraped from the IRS, and a public-record match is not IRS TIN validation.
What it is not
Registry status, formation date, and registered agent come from the California Secretary of State, Business Programs Division (Business Entities); see the California business entity search.
If something is wrong
A name, address, or classification here is what the source published. To correct the source, file with it; to have this page removed, see corrections and removal.
Other California businesses on file
- CAREDX, INC.EIN 94-3316839
- CUTERA, INC.EIN 77-0492262
- MISSION PRODUCE, INC.EIN 95-3847744
- REALTY INCOME CORPORATIONEIN 33-0580106
- ELECTRO RENT CORPORATIONEIN 95-2412961
- EGAIN CORPORATIONEIN 77-0466366
Look up another business
Free search. No account required.