Appendix S1. Instructions: Part I Appendix S2. Instructions: Part 2 Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.

The nominating committee (NC) of the board identifies and nominates individuals for board service, thus establishing the board's composition. Despite this important role, relatively little is known about the NC process, including NC members' actions and thought processes. Based on interviews of 20 U.S. public company NC members, including 16 chairs, we focus on two primary questions: (1) what is the extent of influence that the Chief Executive Officer (CEO) has over committee processes, and (2) to what extent are committee processes formalized (i.e., framed and acted upon in a mechanistic way)? We find that there is continuing recognition of CEO influence in the director nomination process, the level of which varies widely by company. Also, there is considerable variability in the formalization of the director nomination process (e.g., some NCs use search firms and a matrix/grid approach to assessing director skill sets across the board, while others do not). Finally, we find that many interviewees have professional or personal ties to the CEO and that nearly all of the NCs focus on “chemistry” and comfort in the director nomination process, where the often‐stated goal is to enhance the board's ability to function effectively and to reduce risk in the director nomination process. The overall message of the interviews perhaps is best captured by one interviewee, who described a “strange little dance.” Throughout the interviews, we find evidence that the NC must “dance” through a complex decision landscape.

Table S9. Alternate control groups. Table S10. Different time horizons. Table S11. Subsample analyses. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.