The most recent stock split for Zions Bancorporation, N.A (ZION) was a 4:1 split on May 15, 1997. The combined total of all historical stock splits for Zions Bancorporation, N.A result in 8 current shares for every original share available at the IPO in 1990.
Zions Bancorporation, N.A - 34 Year Stock Split History | ZION