<SEC-DOCUMENT>0000897101-25-000425-index.html : 20250707
<SEC-HEADER>0000897101-25-000425.hdr.sgml : 20250707
<ACCEPTANCE-DATETIME>20250707162530
ACCESSION NUMBER:		0000897101-25-000425
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20250707
DATE AS OF CHANGE:		20250707

SUBJECT COMPANY:	

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

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-57671
		FILM NUMBER:		251108349

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SIT INVESTMENT ASSOCIATES INC
		CENTRAL INDEX KEY:			0000769317
		ORGANIZATION NAME:           	
		EIN:				411404829
		STATE OF INCORPORATION:			MN
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G

	BUSINESS ADDRESS:	
		STREET 1:		3300 IDS CENTER
		STREET 2:		80 SOUTH EIGHTH STREET
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55402
		BUSINESS PHONE:		6123323223

	MAIL ADDRESS:	
		STREET 1:		3300 IDS CENTER
		STREET 2:		80 SOUTH EIGHTH STREET
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55402
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.A
<SEQUENCE>2
<FILENAME>sit250634_ex-a.htm
<DESCRIPTION>JOINT FILING AGREEMENT
<TEXT>
Document 2 - file: sit250634_ex-a.htm

</DOCUMENT>
</SEC-DOCUMENT>