EntityWire/Massachusetts business entity search →/X4 PHARMACEUTICALS INC.
Employer with a benefit plan
X4 PHARMACEUTICALS INC.
The Employer Identification Number (EIN) for X4 PHARMACEUTICALS INC. is 27-3181608.
At a glance
- EIN
- 27-3181608 · 273181608
- Legal name
- X4 PHARMACEUTICALS INC.
- Also filed as
- Arsanis, Inc.
- Address on file
- 61 N BEACON ST 4TH FLOOR, BOSTON, MA 02134
- Records show
- SEC filer; employer with a benefit plan; state registration
- Latest record
- 2026-08-14
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
- F23000003890
- Source: Florida registry · as of 2026-07-10
- Registered in Florida
- 2023-06-30
- Source: Florida registry · as of 2026-07-10
- Registered agent
- UNITED AGENT GROUP INC
- Source: Florida registry · as of 2026-07-10
SEC records
SEC EDGAR company filings · records as of 2026-08-14
- SEC CIK
- 0001501697
- Source: SEC · as of 2026-08-14
- Industry (SIC)
- Biological Products, (No Diagnostic Substances) (2836)
- Source: SEC · as of 2026-08-14
- State of incorporation
- DE
- Source: SEC · as of 2026-08-14
- Ticker
- XFOR
- Source: SEC · as of 2026-08-14
- Latest SEC filing
- SCHEDULE 13G/A 2026-08-14
- Source: SEC · as of 2026-08-14
Benefit plans
DOL Form 5500-SF filings (EFAST2) · records as of 2025-08-01
- Benefit plan 1, 2024 filing
- X4 PHARMACEUTICALS INC. 401(K) PLAN
- Source: DOL 5500-SF · as of 2025-08-01
- Participants (start of year)
- 112
- Source: DOL 5500-SF · as of 2025-08-01
- Plan assets (end of year)
- $12,501,376
- Source: DOL 5500-SF · as of 2025-08-01
- Plan features
- Profit-sharing; ERISA 404(c) plan; Participant-directed; 401(k) feature; 401(m) matching; Automatic enrollment
- Source: DOL 5500-SF · as of 2025-08-01
- Plan type
- Single-employer plan
- Source: DOL 5500-SF · as of 2025-08-01
What this record is
Public filings that carry this EIN (DOL Form 5500-SF 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 Secretary of the Commonwealth, Corporations Division; see the Massachusetts 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 Massachusetts businesses on file
- TECOGEN, INC.EIN 04-3536131
- MINIM, INC.EIN 04-2621506
- FRACTYL HEALTH, INCEIN 27-3553477
- BRIDGELINE DIGITAL, INC.EIN 52-2263942
- BYRNA TECHNOLOGIES, INC.EIN 71-1050654
- ISPECIMEN INC.EIN 27-0480143
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