If you prefer stats over visual scanning I've created the following Index:
"Group-X"-EquityBan : At their current rate of investment, how many years must a firm stop investing in CEOs belonging to Group-X for the percentage of Group-X CEOs in their portfolios to match the percentage of Group-X in the population of the city they are headquartered in.
e.g. Let's say a firm called SuperGreat Ventures has 6 male CEOs and two female CEOs in their portfolio. On average SuperGreat Ventures invests in two companies a year and they are headquartered in Chicago where men are 50% of the population.
SuperGreat Ventures will have a MaleEquityBan of two years, since if they exclusively invest in women for the next two years they will add 4 female CEOs to their portfolio, bringing the percentage of male CEOs to 50% which matches Chicago's demographics.
A similar score can be calculated for any group that is over represented in a portfolio.
*this data was collected by one person. lmk if I got something wrong!