Jawbone, maker of fitness trackers, jettisoned roughly 20 employees or about 4 percent of its workforce on Monday, a month after it raised $300 million in financing from private equity firm BlackRock.

A Jawbone spokesman called the layoffs part of an ongoing restructuring. “We try to find roles for people inside the organization,” he said. “However, this is not always possible, and in this instance it has resulted in a small number of redundancies.”