What is your point?
The knock on Newt from some quarters is/was that (discounting "herding" experience being Speaker) he has/had no "executive" or private sector experience.
Looks like not only he has extensive private sector experience, which also created for-profit and non-profit companies from scratch (and creating many pricate sector jobs in the process), but it also shows how much of his activity was oriented toward helping conservative causes, organizations and people / candidates.
What have Romney and Santorum done for conservatives in the same period of time, except running or preparing to run for political office?
Romney, as Warren Buffett said, "... makes his money the same way I make my money ... he makes it shoving around money.".
"Shoving money around" in and of itself is not an "executive" or "job-creating" experience as Romney tried to claim. When he was called on it by Gingrich, he tried to explain it by saying he created jobs by "firing people" and in the same way as Obama's bailout of UAW.