Rule 497(e)
File No. 333-146827
Innovator ETFs® Trust
(the “Trust”)
Innovator Emerging Markets Power Buffer ETF™ – October
Innovator Equity Defined Protection ETF® – 1 Yr October
Innovator Equity Dual Directional 10 Buffer ETF™ – October
Innovator Equity Dual Directional 15 Buffer ETF™ – October
Innovator Growth Accelerated Plus ETF®– October
Innovator Growth-100 Power Buffer ETF™ – October
Innovator International Developed Power Buffer ETF™ – October
Innovator U.S. Equity Accelerated 9 Buffer ETF™– October
Innovator U.S. Equity Accelerated Plus ETF®– October
Innovator U.S. Equity Buffer ETF™ – October
Innovator U.S. Equity Power Buffer ETF™ – October
Innovator U.S. Equity Ultra Buffer ETF™ – October
Innovator U.S. Small Cap Power Buffer ETF™ – October
(each, a “Fund” and together, the “Funds”)
Supplement
to Each Fund’s Prospectus
Dated February 27, 2026, As Supplemented to Date
September 23, 2026
As described in detail in each Fund’s prospectus, an investment in shares of each Fund is subject to an upside return cap (the “Cap”) that represents the maximum percentage return an investor can achieve from an investment in such Fund over an approximately one-year period (the “Outcome Period”). The current Outcome Period will end on September 30, 2026, and each Fund will commence a new Outcome Period that will begin on October 1, 2026 and end on September 30, 2027. Each Fund’s Cap will not be determined until the start of the new Outcome Period. At the commencement of the new Outcome Period, each 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. As of September 23, 2026, the expected range of each Fund’s Cap is set forth below.
| Fund | Ticker | Estimated Cap Range |
| Innovator Emerging Markets Power Buffer ETF™ – October | EOCT | 16.96% – 21.96% (16.07% – 21.07% after taking into account the Fund’s unitary management fee) |
| Innovator Equity Defined Protection ETF® – 1 Yr October | ZOCT |
7.83% – 9.33% |
| Innovator Equity Dual Directional 10 Buffer ETF™ – October | DDTO | 13.11% – 14.61% (12.32% – 13.82% after taking into account the Fund’s unitary management fee) |
| Innovator Equity Dual Directional 15 Buffer ETF™ – October | DDFO | 9.13% – 10.63% (8.34% – 9.84% after taking into account the Fund’s unitary management fee) |
| Innovator Growth Accelerated Plus ETF® – October | QTOC |
18.99% – 26.49% |
| Innovator Growth-100 Power Buffer ETF™ – October | NOCT |
17.03% – 19.53% |
| Innovator International Developed Power Buffer ETF™ – October | IOCT |
10.83% – 15.83% |
| Innovator U.S. Equity Accelerated 9 Buffer ETF™ – October | XBOC |
11.34% – 14.34% |
| Innovator U.S. Equity Accelerated Plus ETF® – October | XTOC |
13.44%
– 17.94% |
| Innovator U.S. Equity Buffer ETF™ – October | BOCT |
18.90%
– 20.40% |
| Innovator U.S. Equity Power Buffer ETF™ – October | POCT | 14.01% – 15.51% (13.22% – 14.72% after taking into account the Fund’s unitary management fee) |
| Innovator U.S. Equity Ultra Buffer ETF™ – October | UOCT |
13.39% – 14.89% |
| Innovator U.S. Small Cap Power Buffer ETF™ – October | KOCT | 16.64% – 19.64% (15.85% – 18.85% after taking into account the Fund’s unitary management fee) |
Please Keep This Supplement With Your Prospectus For Future Reference
INNOVANNSTK 09-26