<SEC-DOCUMENT>0001999371-24-001063.txt : 20240129
<SEC-HEADER>0001999371-24-001063.hdr.sgml : 20240129
<ACCEPTANCE-DATETIME>20240129134829
ACCESSION NUMBER:		0001999371-24-001063
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20240119
FILED AS OF DATE:		20240129
DATE AS OF CHANGE:		20240129

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DALMASO NICHOLAS
		CENTRAL INDEX KEY:			0001251346
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-06495
		FILM NUMBER:		24572643

	MAIL ADDRESS:	
		STREET 1:		10865 AVENUE OF THE AMERICAS,
		STREET 2:		31ST FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10018

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Flaherty & Crumrine PREFERRED & INCOME OPPORTUNITY FUND INC
		CENTRAL INDEX KEY:			0000882071
		ORGANIZATION NAME:           	
		IRS NUMBER:				954355600
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1130

	BUSINESS ADDRESS:	
		STREET 1:		301 E COLORADO BLVD STE 720
		STREET 2:		C/O FLAHERTY & CRUMRINE INC
		CITY:			PASADENA
		STATE:			CA
		ZIP:			91101
		BUSINESS PHONE:		(626) 795-7300

	MAIL ADDRESS:	
		STREET 1:		301 COLORADO BLVD STE 800
		STREET 2:		C/O FLAHERTY & CRUMRINE INC
		CITY:			PASADENA
		STATE:			CA
		ZIP:			91101

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Flaherty & Crumrine PREFERRED INCOME OPPORTUNITY FUND INC
		DATE OF NAME CHANGE:	20050708

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PREFERRED INCOME OPPORTUNITY FUND INC
		DATE OF NAME CHANGE:	19920929
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>ownership.xml
<DESCRIPTION>FORM 3 - DALMASO
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2024-01-19</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000882071</issuerCik>
        <issuerName>Flaherty &amp; Crumrine PREFERRED &amp; INCOME OPPORTUNITY FUND INC</issuerName>
        <issuerTradingSymbol>PFO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001251346</rptOwnerCik>
            <rptOwnerName>DALMASO NICHOLAS</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>301 E. COLORADO BOULEVARD,</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 800</rptOwnerStreet2>
            <rptOwnerCity>PASADENA</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>91101</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <remarks>Exhibit 24 - Power of Attorney</remarks>

    <ownerSignature>
        <signatureName>/s/ Chad C. Conwell as Attorney-in-Fact</signatureName>
        <signatureDate>2024-01-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>poa.htm
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<!-- Field: Rule-Page --><DIV STYLE="margin-top: 3pt; margin-bottom: 3pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 2pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

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<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: right"><B>&nbsp;Exhibit 24</B></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: right"><B>&nbsp;</B></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>POWER OF ATTORNEY</B></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: justify">KNOW ALL PERSONS BY THESE PRESENT that the undersigned
director of each of Flaherty &amp; Crumrine Preferred and Income Fund Incorporated, Flaherty &amp; Crumrine Preferred and Income Opportunity
Fund Incorporated, Flaherty &amp; Crumrine Preferred and Income Securities Fund Incorporated, Flaherty &amp; Crumrine Total Return Fund
Incorporated and Flaherty &amp; Crumrine Dynamic Preferred and Income Fund Incorporated (collectively, the &ldquo;Funds&rdquo;), each
a Maryland corporation, hereby appoints R. Eric Chadwick, Bradford S. Stone and Chad Conwell (with full power to act alone) as his agent
and attorney-in-fact for the purpose of executing in his name, in his capacity as a director of the Funds, for any statement of beneficial
ownership on Form 3, 4 or 5 <FONT STYLE="background-color: white">to be filed with the U.S. Securities and Exchange Commission.</FONT></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">IN WITNESS WHEREOF, the undersigned director of the Funds has executed
this Power of Attorney via facsimile, email or other means.</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0 0 12pt; text-indent: 0in"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 12pt Times New Roman, Times, Serif; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap">&nbsp;</TD>
    <TD STYLE="white-space: nowrap">&nbsp;</TD>
    <TD STYLE="white-space: nowrap">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap"><B><U>Signature</U></B></TD>
    <TD STYLE="white-space: nowrap"><B>&nbsp;</B></TD>
    <TD STYLE="white-space: nowrap"><B><U>Title</U></B></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap">&nbsp;</TD>
    <TD STYLE="white-space: nowrap">&nbsp;</TD>
    <TD STYLE="white-space: nowrap">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap">&nbsp;</TD>
    <TD STYLE="white-space: nowrap">&nbsp;</TD>
    <TD STYLE="white-space: nowrap">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 34%; border-bottom: black 1pt solid">/s/ Nicholas Dalmaso</TD>
    <TD STYLE="white-space: nowrap; width: 3%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 63%">Director</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap">Nicholas Dalmaso</TD>
    <TD STYLE="white-space: nowrap">&nbsp;</TD>
    <TD STYLE="white-space: nowrap">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap">Date: January 26, 2024</TD>
    <TD STYLE="white-space: nowrap">&nbsp;</TD>
    <TD STYLE="white-space: nowrap">&nbsp;</TD></TR>
  </TABLE>


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</DOCUMENT>
</SEC-DOCUMENT>
