Invesco Unit Trusts Taxable Income Series 640: 497J filed Dec 29, 2025

Name: Invesco Unit Trusts Taxable Income Series 640 497J (0001528621-25-001381)
Creator: Invesco Unit Trusts Taxable Income Series 640
Published: 2025-12-29

Form type: 497J
Filing date: Dec 29, 2025
Accession number: 0001528621-25-001381
Filer: Invesco Unit Trusts Taxable Income Series 640 (CIK 1686060)