Dispute at Xfund, a Venture Capital Fund, Bursts Into the Open

Xfund, a beleaguered venture capital firm that has put money into start-ups like the genetics company 23andMe and the real estate outfit Zumper, is breaking new and belligerent ground in the normally discreet world of technology investors. A complaint filed on Friday in Santa Clara County Superior Court in California by Hugo Van Vuuren, one Xfund founder, against Patrick S. Chung, the other founder, and the fund itself, includes accusations of secret contract amendments, bullying and schoolyard name-calling.