It appears that Centuri became Estes-Cox.

I did a search on the Colorado Secretary of State web site and, if I'm interpreting it right, "Centuri Corp." was renamed to "Estes-Cox Corp." on May 20, 1994.

"Estes-Cox Corp." is a Delaware corporation (although, of course, located in Penrose). The Delaware web site only gives limited information (unless you pay $20). It says "Estes-Cox Corp." was incorporated on March 10, 1994, then again on June 7, 2002. The first date corresponds with the name change in Colorado. The second date is listed, I guess, because Barry Tunick bought and re-organized the corporation.

There are still some references to "Centuri" at estesrockets.com (and the corporate domain they use is centurims.com), but I think these are just leftovers from the Centuri period.

Edit: I just realized I replied to an old message. But the above info is new to the discussion.

-- Roger