Case study of Healthline shows the maturity of corporate venturing to helps portfolio companies develop.

The ultimate sign of professionalism is when a corporate venturer can invest again in a portfolio company that has just signed up one of your biggest rivals in a partnership.

Last month’s investment by the $250m Peacock Equity Fund as part of a $14m series C round in Healthline Networks followed the portfolio company’s rapid growth in signing up partners, including one of the fund’s backer’s major rivals including a major rival to one of the fund’s backers, US…