CalPERS targeting can be divided into two regimes: governance structure based (1987-1988) and performance based (1989-1993) target selection. Results show that over the period 1987-1988, only 7% of the target firms either adopted the governance structure changes proposed by CalPERS or made other changes sufficient to warrant a settlement in the first year the firm was targeted. Over the 1989-1993 period, 72% either adopted the proposal or settled with CalPERS. Shareholder wealth (adjusted for market returns) increases by a mean 1.29% at initial announcement of targeting for firms that adopt or settle and decreases by a mean 1.15% for firms that resist. When returns are measured from initial announcement to outcome announcement (settlement or resistance), shareholder wealth increases by an average 3.32% regardless of outcome. For the 37 firms with public announcements, activism results in an estimated $19 million wealth increase for CalPERS. Results for effects on operating performance do not allow me to reject the null hypothesis that activism does not improve operating performance. While operating income of target firms does increase, the increase is not statistically different from improvement for control samples.