Companies / X4 Pharmaceuticals
X4 Pharmaceuticals
Boston, United States
X4 Pharmaceuticals develops medicine for people living with rare immune disorders
X4 Pharmaceuticals, based in Boston, United States, has 5 investors on file, among them K2 HealthVentures, Lumira Ventures and NEA. Its site was last checked 13 Nov 2026: site answers.
Investors
5 investors on file| Investor | Evidence | Type |
|---|---|---|
| Portfolio page | Investor | |
| Portfolio page | Venture capital | |
| Portfolio page | Venture capital | |
| Portfolio page | Venture capital | |
| Portfolio page | Venture capital |
A company is shown only after its own site answers and carries its name. Sites are checked again on a schedule, because domains lapse and get bought. Round stages and dates come from Fundup AI; investor links come from portfolio pages and rounds; other facts name their source when you point at them. How we grade the data
Get X4 Pharmaceuticals and its investors as data
Look up any company's investors, or any investor's full portfolio, through one API key or MCP. A free account also opens Ask AI searches and alerts when K2 HealthVentures adds a company.
Work email, sign-in link by email. Already have an account? Log in- Ask AI5 plain-English investor searches a day
- Full listsEvery portfolio row and two-firm overlap
- API and MCP100 REST or MCP calls a month, one key
- AlertsFollow 5 investors for portfolio and fund changes
$ curl -H "X-API-Key: YOUR_KEY" \
https://api.vcinfo.io/v1/companies/x4pharma.com/investors
# also
GET /v1/companies/x4pharma.com
GET /v1/companies/x4pharma.com/news