The financial gurus and articles can explain it much better than I can. As part of the original purchase, the indigo partners agreed to split it up amongst the respective shareholders in indigo after 10 years. That split just happened a couple weeks ago leaving the different partners with substantial steaks in Frontier, but it is no longer "held airline". Frankie himself owns 44% of the shares and will retain the seat on the board. Indigo Partners itself does still hold several airlines.