By Milana VinnThe Dublin, California-based company is working with investment bank Morgan Stanley to engage with potential acquirers, the sources said. TriNet shares are up 44% so far this year, significantly outperforming an 11% return in the Russell 1000 index, as its business benefited from companies continuing to hire despite a spike in inflation. In April, TriNet raised its net-income-per-diluted-share forecast for 2023 by $0