A unit of W.R. Berkley Corp. has put money in a health account services company.

Berkley Capital Investors L.P., Greenwich, Conn., has acquired a “minority investment” in HealthEquity Inc., Salt Lake City, according to HealthEquity.

W.R. Berkley is a large commercial property-casualty insurer.

HealthEquity says it will use the Berkley cash to finance expansion, but it is not saying how much cash it bought or how big of a stake Berkley purchased.

HealthEquity sells Web services and financial services that consumers can use to manage health insurance programs that incorporate health savings accounts and other types of personal health accounts.

HealthEquity clients include about 1,800 employers, health plans, benefit plan administrators and financial institutions, according to HealthEquity.