Truman Arnold Pole Vaults to Top of Largest Private Companies List by Gwen Moritz Posted 4/2/2001 12:00 am Updated 4 years ago Truman Arnold Cos. of Texarkana, the largest privately owned company on Arkansas Business' annual list, isn't even in Arkansas. Want the Full Article? Get Unlimited Archive Access for $19.95 per Year Readers must pay to access stories older than 20 days. Purchase Now Already have archive access? Login to view this article.