NUVEEN CALIFORNIA AMT-FREE QUALITY MUNICIPAL INCOME FUND (NKX) Form 424B3 — Oct 2, 2026

Nuveen California AMT-Free Quality Municipal Income Fund filed a Rule 424(b)(3) prospectus supplement dated October 2, 2026, amending its September 15, 2026 prospectus supplement. The supplement replaces the second paragraph of the 'Use of Proceeds' section, clarifying that net proceeds from Common Share issuances will be invested per the fund's objective, substantially within about three months, and pending investment held in U.S. Government securities or high-quality short-term money market instruments. The amendment also notes the fund may use proceeds to pay distributions to shareholders.

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