Kathleen Johnston, Brian Scullion and Mio Stojkovich were appointed managing directors at William Blair Capital Partners, according to a official at William Blair who asked not to be named. Ms. Johnston was a principal at Lake Capital, according to a posting on William Blair's website. A spokeswoman at Lake Capital would not comment. Mr. Scullion is a partner in the corporate finance division of parent William Blair & Co. Mr. Stojkovich was a vice president at William Blair Capital Partners. William Blair Capital is reforming its fund management team after the majority of management staff departed in 2004 to form Chicago Growth Partners, an independent private equity firm.