<SEC-DOCUMENT>0001999371-24-014204.txt : 20241031
<SEC-HEADER>0001999371-24-014204.hdr.sgml : 20241031
<ACCEPTANCE-DATETIME>20241031155430
ACCESSION NUMBER:		0001999371-24-014204
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20241031
DATE AS OF CHANGE:		20241031

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NUVEEN CALIFORNIA SELECT TAX FREE INCOME PORTFOLIO
		CENTRAL INDEX KEY:			0000885732
		ORGANIZATION NAME:           	
		IRS NUMBER:				363828111
		STATE OF INCORPORATION:			MA

	FILING VALUES:
		FORM TYPE:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-271871
		FILM NUMBER:		241415066

	BUSINESS ADDRESS:	
		STREET 1:		333 W WACKER DR
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
		BUSINESS PHONE:		3129178200

	MAIL ADDRESS:	
		STREET 1:		333 W WACKER DRIVE
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NUVEEN INSURED CALIFORNIA SELECT TAX FREE INCOME PORTFOLIO
		DATE OF NAME CHANGE:	19920929

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NUVEEN CALIFORNIA SELECT TAX FREE INCOME PORTFOLIO
		DATE OF NAME CHANGE:	19600201
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B3
<SEQUENCE>1
<FILENAME>nxc-424b3_103124.htm
<DESCRIPTION>PROSPECTUS
<TEXT>
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<!-- Field: Rule-Page --><DIV STYLE="margin-top: 12pt; margin-bottom: 3pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 2pt solid; border-bottom: Black 1pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Nuveen
California Select Tax-Free Income Portfolio (NYSE: NXC) (the &ldquo;Fund&rdquo;)</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>Supplement
Dated October 31, 2024</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-variant: small-caps"><B>To The
Fund&rsquo;s Currently Effective Prospectus</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Effective October 31, 2024, the information appearing under the heading
&ldquo;Risk Factors&rdquo; of the Prospectus is hereby supplemented with the following:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in"><I>Direct lending risk:</I> The Fund may engage in direct
lending. Direct loans between the Fund and a borrower may not be administered by an underwriter or agent bank. The Fund may provide financing
to commercial borrowers directly or through companies affiliated with the Fund. The terms of the direct loans are negotiated with borrowers
in private transactions. Furthermore, a direct loan may be secured or unsecured. The Fund will rely primarily upon the creditworthiness
of the borrower and/or any collateral for payment of interest and repayment of principal. Direct loans may subject the Fund to liquidity
risk, interest rate risk, and borrower default or insolvency. Direct loans are not publicly traded and may not have a secondary market
which may have an adverse impact on the ability of the Fund to dispose of a direct loan and/or value the direct loan. The Fund&rsquo;s
performance may be impacted by the Fund&rsquo;s ability to lend on favorable terms as the Fund may be subject to increased competition
or a reduced supply of qualifying loans which could lead to lower yields and reduce Fund performance.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in">As part of its lending activities, the Fund may originate
loans to companies that are experiencing significant financial or business difficulties, including companies involved in bankruptcy or
other reorganization and liquidation proceedings. Although the terms of such financing may result in significant financial returns to
the Fund, they involve a substantial degree of risk. The level of analytical sophistication, both financial and legal, necessary for successful
financing to companies experiencing significant business and financial difficulties is unusually high. Different types of assets may be
used as collateral for the Fund&rsquo;s loans and, accordingly, the valuation of and risks associated with such collateral will vary by
loan. There is no assurance that the Fund will correctly evaluate the value of the assets collateralizing the Fund&rsquo;s loans or the
prospects for a successful reorganization or similar action. In any reorganization or liquidation proceeding relating to a borrower that
the Fund is lending money to, the Fund may lose all or part of the amounts advanced to the borrower or may be required to accept collateral
with a value less than the amount of the loan advanced by the Fund to the borrower. Furthermore, in the event of a default by a borrower,
the Fund may have difficulty disposing of the assets used as collateral for a loan. To the extent the Fund seeks to engage in direct lending,
the Fund will be subject to enhanced risks of litigation, regulatory actions and other proceedings. As a result, the Fund may be required
to pay legal fees, settlement costs, damages, penalties or other charges, any or all of which could materially adversely affect the Fund
and its holdings.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>PLEASE KEEP THIS WITH YOUR</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>FUND&rsquo;S PROSPECTUS FOR FUTURE REFERENCE</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right"><B>EGN-NXCP-1024P</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right">&nbsp;</P>

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