Page 1

of 9 Pages

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	13 G
CUSIP NO.  6706EN-80-3		Page 3 of 9 Pages

1	NAMES OF REPORTING PERSONS
	Citibank, N.A.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
	(a)☐
	(b)☐
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION
	Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER
		6	SHARED VOTING POWER
			0
		7	SOLE DISPOSITIVE POWER
			0
		8	SHARED DISPOSITIVE POWER
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	0
10	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
	☐
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
	0.0%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
	BK

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	13 G
CUSIP NO.  6706EN-80-3		Page 4 of 9 Pages

1	NAMES OF REPORTING PERSONS
	Citicorp
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
	(a)☐
	(b)☐
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION
	Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER
		6	SHARED VOTING POWER
			0
		7	SOLE DISPOSITIVE POWER
			0
		8	SHARED DISPOSITIVE POWER
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	0
10	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
	☐
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
	0.0%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
	HC

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Item 1(a).

Name of Issuer:

Nuveen Floating Rate Income Opportunity Fund

 

Item 1(b).

Address of Issuer’s Principal Executive Offices:

 

Item 2(a).

Name of Person Filing:

 

Item 2(b).

Address of Principal Business Office or, if none, Residence:

Item 2(c).

Citizenship:

 

 

Item 2(d).

Title of Class of Securities:

Item 2(e).

CUSIP Number:

 

6706EN-80-3

 

Item 3.

If This Statement Is Filed Pursuant to Sections 240.13d-1(b) or 240.13d-2(b) or (c), Check Whether the Person Filing Is a(n):

 

(a)

☐ Broker or dealer registered under Section 15 of the Act (15 U.S.C. 78o);

(b)

☒ Bank as defined in Section 3(a)(6) of the Act (15 U.S.C. 78c);

(c)

☐ Insurance company as defined in Section 3(a)(19) of the Act (15 U.S.C. 78c);

(d)

☐ Investment company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);

(e)

☐ Investment adviser in accordance with Section 240.13d-1(b)(1)(ii)(E);

(f)

☐ Employee benefit plan or endowment fund in accordance with Section 240.13d-1(b)(1)(ii)(F);

(g)

☒ Parent holding company or control person in accordance with Section 240.13d-1(b)(1)(ii)(G);

(h)

☐ Savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i)

☐ Church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j)

☐ A non-U.S. institution in accordance with Section 240.13d-1(b)(1)(ii)(J);

(k)

☐ Group, in accordance with Section 240.13d-1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with Section 240.13d-1(b)(1)(ii)(J), please specify the type of institution: ____________________________ .

Item 4.

Ownership. (as of December 30, 2016)

Item 5.

Ownership of Five Percent or Less of a Class.

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following ☒.

 

Item 6.

Ownership of More Than Five Percent on Behalf of Another Person.

Not Applicable.

Item 7.

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company.

CRC Funding is a partially supported multi-seller commercial paper conduit sponsored by Citibank. Citicorp is the sole stockholder of Citibank. Citigroup is the sole stockholder of Citicorp.

 

Item 8.

Identification and Classification of Members of the Group.

Not Applicable.

Item 9.

Notice of Dissolution of Group.

Not Applicable.

 

Item 10.

Certification.

 

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

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