Rakesh Gangwal, co-founder of IndiGo and a board of directors member at Southwest Airlines, had gone on a shopping spree to acquire the latter airline’s shares, with the director now owning over 3.6 million of common shares of Southwest Airlines.

Southwest Airlines (LUV) just got a big endorsement of its turnaround plan — from the inside. Reuters reports that board of directors member Rakesh Gangwal, the founder of the Indian budget airline Indigo,

Rakesh Gangwal, a director at Southwest Airlines Co (NYSE:LUV), has made a significant investment in the company by acquiring 3.6 million shares, valued at over $100 million. This purchase comes amid mounting pressure from activist investor Elliott Investment Management for changes in leadership.

Southwest Airlines Co. shares are climbing after board member and billionaire co-founder of InterGlobe Aviation Ltd., Rakesh Gangwal, purchased about $107 million worth of the company’s stock, according to Securities and Exchange Commission filings on Thursday.

In a series of transactions disclosed over seven filings, Gangwal acquired 3.6 million of the carrier’s common shares for roughly $29 apiece.