Short answers, pulled from the story.
Ted Adams, Robbie Robbins, Alex Garner, and Kris Oprisko formed Idea and Design Works in 1999 as equal partners. Each founder owned exactly 25% of the new company before Jim Lee transferred his creative service department to them that same year.
Una Fanta launched in March 2002 as the first official publication under IDW Publishing. This art book followed a failed TV show concept and preceded the adaptation of Steve Niles' screenplay into 30 Days of Night.
IDT Corporation purchased a 53% majority interest in IDW from the founders in 2007 and increased its stake to 76% by 2009. This transaction removed founders Alex Garner and Kris Oprisko while reducing Ted Adams and Robbie Robbins to minority owners holding just 47% initially.
IDW licensed Doctor Who from the BBC in 2008 and acquired G.I. Joe comics in May 2008 under editor Andy Schmidt. The company also ran multiple concurrent titles for Hasbro brands including Transformers and published comics based on franchises like CSI and Underworld.
Between April and May 2020, IDW furloughed and laid off employees including Managing Editor Denton Tipton due to the COVID-19 pandemic. Chris Ryall stepped down as President in July 2020, and around 2021 the Disney license passed to Marvel Comics while Star Wars rights returned to Dark Horse Comics.