Prospectus by Investment Company (Form 497)

Rule 497(e)

File No. 333-146827

Innovator ETFs^® Trust

(the "Trust")

Innovator Equity Defined Protection ETF^® - 2 Yr to October 2026

(the "Fund")

Supplement To The Fund's Prospectus
Dated February 27, 2026, As Supplemented To Date

September 23, 2026

As described in detail in the Fund's prospectus, an investment in shares of the Fund is subject to an upside return cap (the "Cap") that represents the maximum percentage return an investor can achieve from an investment in the Fund for the Outcome Period (as defined in the Fund's prospectus) of approximately two years. The current Outcome Period will end on September 30, 2026, and the Fund will commence a new Outcome Period that will begin on October 1, 2026 and end on September 30, 2028. The Fund's Cap will not be determined until the start of the new Outcome Period. At the commencement of the new Outcome Period, the Fund will file a supplement to its prospectus that will include the actual Cap for the new Outcome Period, which may be higher or lower than the estimated Cap ranges set forth below. Additionally, as previously announced, effective at the beginning of the new Outcome Period, the Fund's name will change from "Innovator Equity Defined Protection ETF^®- 2 Yr to October 2026" to "Innovator Equity Defined Protection ETF^® - 2 Yr to October 2028". The Fund's ticker will not change. As of September 23, 2026, the expected range of the Fund's Cap is set forth below.

Please Keep This Supplement With Your Prospectus For Future Reference

INNAOCTSTK 09-26