The firm was founded in 1967 by Cy Steiner, Harry Bressler and John Zimmermann with Stewart as a silent partner. The company's clients have included Verizon Wireless, Home Depot, Honda of Alabama, Bruno's, Parisian, and Buffalo Rock as well as organizations like Samford University, 16th Street Baptist Church, the Birmingham Civil Rights Institute and the Alabama Symphony Orchestra. It moved to the former Unity Health Management Services building at 2160 Highland Avenue in 1999.
In 2007 the firm moved its offices 2160 Highland Avenue and the adjacent Bradshaw House to an entire 25,000 square-foot floor of the 600 University Park Place building off Lakeshore Drive. In early 2008 President and Chief Creative Officer John Zimmerman left for personal reasons and the firm's internal structure was reorganized to better serve client accounts. Stewart assumed 100% ownership in August 2008.
O2 Ideas has been involved in community-based pro-bono work such as Stewart's "InsideOut" motivational video and the Mattie C. Stewart Foundation, both of which encourage young people to stay in school.
The firm is the parent of Barking Dog Studios, an in-house media production company.
- Patureau, Alan (July 5, 1994) "Unconventional Leader Energizes Steiner/Bressler, Alabama Ad Agency." Atlanta Journal-Constitution
- Diel, Stan (September 27, 1996) "Bruno's drops city ad agency." The Birmingham News
- Fennelly, Sean (August 20, 2004) "This old house becomes a home for O2 expansion." Birmingham Business Journal
- Cooper, Lauren B. (January 26, 2007) "O2 moving its HQ to Lakeshore." Birmingham Business Journal
- Stone, Adam (August 17, 2007) "Stewart's experiences drive o2's national focus." Birmingham Business Journal
- Thornton, William (February 16, 2008) "Alabama's Shelley Stewart retools public relations firm o2 ideas." The Birmingham News
- Diel, Stan (December 25, 2012) "Ad firm o2ideas sets bar high for Christmas card. The Birmingham News
- O2 Ideas website