NUVEEN MASSACHUSETTS QUALITY MUNICIPAL INCOME FUND (NMT) Form 424B3 — Oct 2, 2026

Nuveen Massachusetts Quality Municipal Income Fund (NYSE: NMT) filed a prospectus supplement dated October 2, 2026, amending its June 5, 2026 prospectus supplement. The supplement replaces the 'Use of Proceeds' paragraph, stating net proceeds from common share issuances will be invested per the Fund's objective, with substantially all proceeds deployed within approximately three months, and pending investment held in U.S. Government securities or money market instruments. Notably, the amended language permits proceeds to be used to pay distributions to shareholders, a common practice among closed-end funds that investors monitor for return-of-capital implications.

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