Vestin Group and affiliated real estate mortgage loan funds have filed a lawsuit in federal court in San Diego, seeking more than $1 million from an activist investor.

Vestin spokesman Steve Stern of Stern and Co. public relations said Vestin doesn’t comment on lawsuits. Vestin I was unchanged Thursday, closing at $1.25 a share on the Nasdaq.

Vestin Realty Mortgage I, Inc., formerly Vestin Fund I, LLC, invests in loans secured by real estate through deeds of trust or mortgages and as defined in our management agreement as mortgage assets.