EntityWire/California business entity search →/IONIS PHARMACEUTICALS, INC.
Employer with a benefit plan
IONIS PHARMACEUTICALS, INC.
The Employer Identification Number (EIN) for IONIS PHARMACEUTICALS, INC. is 33-0336973.
At a glance
- EIN
- 33-0336973 · 330336973
- Legal name
- IONIS PHARMACEUTICALS, INC.
- Also filed as
- ISIS PHARMACEUTICALS INC
- Address on file
- 2855 GAZELLE COURT, CARLSBAD, CA 92010
- Records show
- SEC filer; employer with a benefit plan; state registration
- Latest record
- 2026-09-04
State registration
Florida Division of Corporations (Sunbiz) bulk data · records as of 2026-07-10
- Florida registration
- Active · Foreign profit corporation
- Source: Florida registry · as of 2026-07-10
- Florida document number
- F25000001061
- Source: Florida registry · as of 2026-07-10
- Registered in Florida
- 2025-02-21
- Source: Florida registry · as of 2026-07-10
- Registered agent
- C T CORPORATION SYSTEM
- Source: Florida registry · as of 2026-07-10
SEC records
SEC EDGAR company filings · records as of 2026-09-04
- SEC CIK
- 0000874015
- Source: SEC · as of 2026-09-04
- Industry (SIC)
- Pharmaceutical Preparations (2834)
- Source: SEC · as of 2026-09-04
- State of incorporation
- CA
- Source: SEC · as of 2026-09-04
- Ticker
- IONS
- Source: SEC · as of 2026-09-04
- Latest SEC filing
- 8-K 2026-09-04
- Source: SEC · as of 2026-09-04
Benefit plans
DOL Form 5500 filings (EFAST2) · records as of 2025-08-25
- Benefit plan 1, 2024 filing
- IONIS PHARMACEUTICALS 401(K) PLAN
- Source: DOL 5500 · as of 2025-08-25
- Participants (start of year)
- 1,317
- Source: DOL 5500 · as of 2025-08-25
- Plan features
- Participant-directed; 401(k) feature; 401(m) matching; Participant-directed brokerage; Pension plan with defined contribution; Automatic enrollment
- Source: DOL 5500 · as of 2025-08-25
- Plan type
- Single-employer plan
- Source: DOL 5500 · as of 2025-08-25
- Business code (NAICS)
- 541700
- Source: DOL 5500 · as of 2025-08-25
What this record is
Public filings that carry this EIN (DOL Form 5500 filings (EFAST2), Florida Division of Corporations (Sunbiz) bulk data and SEC EDGAR company filings), 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
- UDEMY, INC.EIN 27-1779864
- INARI MEDICAL, INC.EIN 45-2902923
- ZUORA, INC.EIN 20-5530976
- TWIST BIOSCIENCE CORPORATIONEIN 46-2058888
- FASTLY, INC.EIN 27-5411834
- UPWORK INC.EIN 46-4337682
Look up another business
Free search. No account required.