A group of 14 Boies Schiller Flexner partners in Los Angeles and one in San Francisco are leaving the firm with plans to join King & Spalding, according to four people familiar with the moves, in the latest departures from a firm that had already seen more than a dozen partners leave since January.

Boies Schiller and King & Spalding did not respond to Law.com's requests for comment on the moves.

The departures deal a major blow to the California presence Boies Schiller has steadily built over the past few years and add to a list of 17 partners that had already left the firm this year. All in all, the firm has lost over a fifth of its 150-attorney partnership since January.