Nuveen Select Tax-Free revises share proceeds use

The revised language also permits proceeds from Common Shares to be used for distributions to shareholders.

Rhea-AI Filing Summary

Nuveen Select Tax-Free Income Portfolio (NXP) replaces the “Use of Proceeds” paragraph in its prospectus supplement. Net proceeds from Common Shares issued under the supplement will be invested in accordance with the Fund’s investment objective and policies. The Fund anticipates investing substantially all net proceeds in qualifying investments within approximately three months of receipt. Pending investment, proceeds are anticipated to go into short- or long-term securities issued by the U.S. Government and its agencies or instrumentalities, or high-quality, short-term money market instruments.

Filing Explained

The revised terms add shareholder distributions as a permitted use of proceeds from Common Share issuance, alongside investment under the Fund’s policies, so proceeds may fund distributions rather than investments alone.

Key Figures

Anticipated investment period: approximately three months

1 metrics

Anticipated investment period approximately three months To invest substantially all net proceeds after receipt

Key Terms

net proceeds, investment objective and policies, money market instruments

3 terms

net proceeds financial

"net proceeds from the issuance of Common Shares"

The amount of money a company actually keeps from a sale or fundraising after paying all direct costs and fees, similar to take-home pay after taxes and deductions. Investors care because net proceeds determine how much cash is available for things that affect value—paying debt, funding projects, buying assets, or returning money to shareholders—so it influences future growth potential and financial health.

investment objective and policies financial

"in accordance with the Fund’s investment objective and policies"

money market instruments financial

"high-quality, short-term money market instruments"

Offering Details

supplement

Offering

Offering Type supplement

Securities Offered Common Shares

Use of Proceeds Net proceeds will be invested in accordance with the Fund’s investment objective and policies; substantially all are anticipated to be invested within approximately three months of receipt. Pending investment, proceeds are anticipated to be invested in U.S. Government and agency or instrumentality securities, or high-quality, short-term money market instruments. The Fund may also use proceeds to pay shareholder distributions.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How will NXP use proceeds from Common Shares?

NXP’s net proceeds from Common Shares issued under the supplement will be invested in accordance with the Fund’s investment objective and policies. The Fund anticipates investing substantially all net proceeds within approximately three months of receipt. Pending investment, proceeds are anticipated to go into U.S. Government and agency or instrumentality securities, or high-quality, short-term money market instruments; they may also be used to pay shareholder distributions.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/02/2026 - 02:32 PM Accepted by SEC EDGAR 10/02/2026 - 09:31 AM Learn about SEC filing dates

Filed Pursuant to Rule 424(b)(3)
Registration No. 333-296853

Nuveen Select Tax-Free Income Portfolio (NYSE: NXP)

(the “Fund”)

Supplement Dated October 2, 2026

to the Fund’s Prospectus Supplement Dated June 17, 2026 (the “Prospectus Supplement”)

The second paragraph in the section of the Prospectus Supplement titled “Use of Proceeds” is hereby deleted and replaced with the following:

The net proceeds from the issuance of Common Shares hereunder will be invested in accordance with the Fund’s investment objective and policies as set forth in the accompanying prospectus. The Fund currently anticipates that it will be able to invest substantially all of the net proceeds in investments that meet the Fund’s investment objective and policies within approximately three months of the receipt of such proceeds. Pending investment, it is anticipated that the proceeds will be invested in short-term or long-term securities issued by the U.S. Government and its agencies or instrumentalities or in high-quality, short-term money market instruments. In addition, the Fund may use such proceeds to pay distributions to shareholders.

PLEASE KEEP THIS WITH YOUR

FUND’S PROSPECTUS SUPPLEMENT

FOR FUTURE REFERENCE

EGN-NXPP-1026P