Acxiom Had Data on 11 of 19 Hijackers in 9/11 Attack by Arkansas Business staff Posted 12/7/2001 08:55 am Updated 6 years ago A leader at Acxiom Corp. says that Acxiom databases contained information on 11 of the 19 hijackers involved in the Sept. 11 terrorist attacks in New York and Washington, D.C. Want the Full Article? Get Unlimited Archive Access for $19.95 per Year Readers must pay to access articles older than 15 days. Articles newer than 15 days are not included in this offer. Purchase Now Already have archive access? Login to view this article.