Wis. Stat. § 223.21
Any trust company bank organized, continued or reorganized under this chapter may consolidate with any other similar corporation in the manner provided for the consolidation of banks under s. 221.0702; and in the event of such consolidation the consolidated corporation, by whatever name it may assume or be known, shall be a continuation of the entity of each and all of the corporations so consolidated for all purposes whatsoever, including holding and performing any and all trusts and fiduciary relations of whatsoever nature of which the corporations so consolidating, or either or any of them, was fiduciary at the time of the consolidation, and also including its appointment in any fiduciary capacity by any court or otherwise, and the holding, accepting and performing of any and all trusts and fiduciary relations whatsoever as to or for which either or any one of the corporations so consolidating may have been appointed, nominated or designated by any will or conveyance or otherwise, whether or not the trust or fiduciary relation shall have come into being or taken effect at the time of the consolidation.
Wis. Stat. § 223.21