* IPALCO Enterprises ([[Indianapolis Power & Light]])<ref name="CLEAR"/>
* Irby Construction Co.<ref name="CLEAR"/>
* Isaacson and Walsh, P.C. Donald Isaacson is listed as a "ALEC Private Sector Non-Member in a 2018 email.<ref name="taylor"/>
* Isle Blackhawk, "Trustee's" level funder of ALEC's 2016 Annual Conference.<ref name="aarp 2016"/>