Here is some additional comparison and analysis of the 61 companies with Chairman and CEO roles combined at the end of our analysis period versus the 39 companies with roles split.
The combined companies are on average a little larger in terms of revenue. Their average F100 rank is 47, the split roles companies 53 (with the higher number indicating smaller company size). The medians are 48 and 52. The roughly 60/40 proportion of combined/split holds for the F10 and F20; however, with the exception of Walmart at #2, the seven largest companies have roles combined.
When we look at the other quintiles of the F100, we find that combined companies dominate the middle (#41-60) 85% to 15%, while split companies are the majority of the smallest quintile (#81-100) with 55%.
Also interesting are the variations across our six categories. As the chart shows, the median rank of the Single Split companies (71) is significantly higher than the others. And the lowest median rank belongs to the companies with complex changes. We conclude that smaller companies are more inclined or able to split roles, and that large size has its challenges, including with leadership structure and transition.
Figure 4: Combined vs Split by Median Fortune Rank
When making size comparisons, keep in mind that, though these are all large corporations, the range across the F100 is also large. The two biggest companies (Exxon Mobil and Walmart) had annual revenues of around $450B, the next two (Chevron and ConocoPhillips) around $250B. Then it’s a $100B drop to General Motors at #5, where the distribution starts to even out. The largest company is about 15 times the size of the 100th.
Looking at industry distribution, we find that manufacturing and industrial companies are more likely to have roles combined, as are consumer goods and transportation. Somewhat surprising is that health sector companies tend to be combined, but note that they include large pharmaceutical and distribution companies as well as health providers, insurers, and benefits managers.
In technology, retail, and food production, a majority of the companies have roles split. Energy/Chemical and Financial Services/Insurance are close to the F100-wide 60/40 split. Splits during the financial crisis created the current balance in financial services.
Figure 5: Combined vs Split by Industry
As we noted earlier, companies with combined roles have on average been more stable in terms of both the number of CEO transitions and the ability to promote from within.
Currently combined companies average 1.5 CEO transitions between 2000 and 2013, currently split companies 2.0. The Always Combined companies averaged less then one. Across all currently combined companies, insiders succeeded to the CEO role 90% of the time. Across all currently split companies, it was 68% of the time. Note that we’re tracking the overall tendencies of these organizations, and some of the transitions occurred before they adopted their current leadership structures.
The next chart underscores the point by comparing the distributions of the number of times the CEO role turned over. Among the combined companies, there are eight outliers with three or more CEO transitions (two in the Complex Changes group). 87% had two transitions or fewer. The proportion is higher among the split companies, where 33% have had three or four CEO transitions.
Figure 6: Combined vs Split by Number of CEO Transitions
It might be the case that having the Chairman and CEO roles combined would make it easier to attract a very strong CEO from outside. However, combined companies – and especially the Always Combined – have little CEO turnover and rely on strong internal succession planning.