Edgar Filing: Nuveen Floating Rate Income Opportunity Fund

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number 811-21579

Nuveen Floating Rate Income Opportunity Fund

(Exact name of registrant as specified in charter)

333 West Wacker Drive, Chicago, Illinois 60606

(Address of principal executive offices) (Zip code)

Kevin J. McCarthy—Vice President and Secretary

333 West Wacker Drive, Chicago, Illinois 60606

(Name and address of agent for service)

Registrant’s telephone number, including area code: 312-917-7700

Date of fiscal year end: 7/31

Date of reporting period: 10/31/12

Form N-Q is to be used by management investment companies, other than small business investment companies registered on Form N-5 (§§ 239.24 and 274.5 of this chapter), to file reports with the Commission, not later than 60 days after the close of the first and third fiscal quarters, pursuant to rule 30b1-5 under the Investment Company Act of 1940 (17 CFR 270.30b1-5). The Commission may use the information provided on Form N-Q in its regulatory, disclosure review, inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-Q, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-Q unless the Form displays a currently valid Office of Management and Budget (“OMB”) control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to the Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507.

Item 1. Schedule of Investments

	Portfolio of Investments (Unaudited)

	Nuveen Floating Rate Income Opportunity Fund (JRO)
	October 31, 2012

Principal
Amount (000)		Description (1)	Coupon	Maturity (2)	Ratings (3)	Value
		Variable Rate Senior Loan Interests – 115.4% (78.8% of Total Investments) (4)
		Aerospace & Defense – 0.2% (0.1% of Total Investments)
$	407	DAE Aviation Holdings, Inc., Term Loan B1	7.250%	7/31/14	B	$		407,018
389		DAE Aviation Holdings, Inc., Term Loan B2	7.250%	7/31/14	B	388,544
796		Total Aerospace & Defense				795,562
		Airlines – 3.0% (2.1% of Total Investments)
8,000		Delta Air Lines Inc., Term Loan B1, WI/DD	TBD	TBD	Ba2	7,980,000
3,000		Delta Air Lines Inc., Term Loan B2, WI/DD	TBD	TBD	Ba2	2,987,499
1,053		United Air Lines, Inc., Term Loan B	2.250%	2/01/14	BB-	1,044,949
12,053		Total Airlines				12,012,448
		Asset Backed Securities – 0.5% (0.3% of Total Investments)
2,000		Oak Hill Credit Partners IV Limited, Collatrealized Loan Obligation Series 2012-6A	5.317%	11/20/23	BB	1,847,172
		Auto Components – 3.0% (2.0% of Total Investments)
8,227		Federal-Mogul Corporation, Tranche B, Term Loan	2.148%	12/29/14	B1	7,756,319
4,198		Federal-Mogul Corporation, Tranche C, Term Loan	2.148%	12/28/15	B1	3,958,083
12,425		Total Auto Components				11,714,402
		Biotechnology – 2.9% (2.0% of Total Investments)
1,068		Alkermes, Inc., 2019 Term Loan	4.500%	9/25/19	BB	1,076,267
2,000		Explorer Holdings, Inc., Term Loan, First Lien	8.000%	5/02/18	B+	2,003,750
3,547		Grifols, Inc., Term Loan	4.500%	6/01/17	BB	3,589,800
4,937		Onex Carestream Finance LP, Term Loan	5.000%	2/25/17	BB-	4,893,969
11,552		Total Biotechnology				11,563,786
		Building Products – 1.0% (0.6% of Total Investments)
1,816		Goodman Global Holdings, Term Loan B	5.750%	10/28/16	B+	1,823,850
1,909		Goodman Global Inc., Second Lien, Term Loan	9.000%	10/28/17	B-	1,932,000
3,725		Total Building Products				3,755,850
		Capital Markets – 1.4% (1.0% of Total Investments)
1,700		American Capital Limited Senior Loan	5.500%	8/15/16	BB	1,712,750
290		BNY Convergex Group LLC, Incremental Term Loan	5.250%	12/19/16	B+	283,509
663		BNY Convergex Group LLC, Term Loan	5.250%	12/19/16	B+	647,087
2,888		Citco III Limited, Term Loan	5.500%	6/29/18	N/A	2,915,517
5,541		Total Capital Markets				5,558,863
		Chemicals – 0.9% (0.6% of Total Investments)
245		Hexion Specialty Chemicals, Inc., Tranche C, Term Loan B1	4.000%	5/05/15	Ba3	243,897
105		Hexion Specialty Chemicals, Inc., Tranche C, Term Loan B2	4.125%	5/05/15	Ba3	104,728
2,090		Ineos US Finance LLC, Term Loan B	6.500%	5/04/18	B+	2,121,705
957		Styron S.a.r.l. Corporation,Term Loan	8.000%	8/02/17	B+	915,611
3,397		Total Chemicals				3,385,941
		Commercial Banks – 0.2% (0.2% of Total Investments)
988		SourceHov LLC, Term Loan B, First Lien	6.625%	4/28/17	BB-	980,711
		Commercial Services & Supplies – 1.9% (1.3% of Total Investments)
2,500		Brand Energy & Infrastructure Services, Inc., Term Loan B, First Lien, WI/DD	TBD	TBD	B	2,491,667
1,500		Brand Energy & Infrastructure Services, Inc., Term Loan B, Second Lien, WI/DD	TBD	TBD	CCC+	1,485,000
2,321		Ceridian Corporation, Extended Term Loan	5.964%	5/09/17	B1	2,316,342
995		Houghton Mifflin, Term Loan	7.250%	5/22/18	N/R	1,012,412
7,316		Total Commercial Services & Supplies				7,305,421
		Communications Equipment – 2.8% (1.9% of Total Investments)
7,292		Avaya, Inc., Term Loan	3.177%	10/27/14	B1	7,115,615
2,500		CompuCom Systems, Inc., Term Loan, Second Lien	10.250%	10/04/19	B-	2,475,000
1,244		Genesys International Corporation, Term Loan B	6.750%	1/31/19	BB-	1,263,184
11,036		Total Communications Equipment				10,853,799
		Consumer Finance – 2.3% (1.6% of Total Investments)
1,000		Jackson Hewitt Tax Service, Inc., Term Loan	10.000%	10/16/17	N/R	965,000
2,000		Residential Capital Corp, Term Loan A1	5.000%	11/18/13	Ba1	2,008,750
1,000		Residential Capital Corp, Term Loan A2	6.750%	11/18/13	BB	1,013,750
3,484		Royalty Pharma Finance Trust, Incremental Term Loan	4.000%	11/09/18	Baa2	3,508,576
1,750		Springleaf Financial Funding Company, Term Loan	5.500%	5/10/17	B3	1,728,125
9,234		Total Consumer Finance				9,224,201
		Containers & Packaging – 0.3% (0.2% of Total Investments)
1,001		Sealed Air Corporation, Term Loan	4.750%	10/03/18	Ba1	1,008,359
		Distributors – 1.7% (1.2% of Total Investments)
6,484		HD Supply, Inc., Term Loan	7.250%	10/12/17	B+	6,690,420
		Diversified Consumer Services – 2.2% (1.5% of Total Investments)
3,136		Brickman Group Holdings, Inc., Tranche B1, Term Loan	5.500%	10/14/16	B+	3,182,680
1,900		Cengage Learning Acquisitions, Inc., Term Loan	2.470%	7/03/14	B	1,816,875
3,861		Laureate Education, Inc., Extended Term Loan	5.250%	6/15/18	B1	3,851,542
8,897		Total Diversified Consumer Services				8,851,097
		Diversified Financial Services – 2.0% (1.4% of Total Investments)
2,000		ADS Waste Holdings Inc., Term Loan B	5.250%	10/09/19	B1	2,021,042
1,746		Ferrara Candy Company, Term Loan B	7.509%	6/18/18	B	1,769,627
3,990		Sheridan Holdings, Inc., Term Loan, First Lien	6.000%	7/01/18	B+	4,027,406
7,736		Total Diversified Financial Services				7,818,075
		Diversified Telecommunication Services – 2.4% (1.7% of Total Investments)
3,000		Charter Communications Operating Holdings LLC, Holdco Term Loan	2.712%	3/06/14	BB+	3,003,282
1,000		Intelsat Jackson Holdings, Ltd., Term Loan B1	4.500%	4/02/18	B1	1,008,839
2,000		Intelsat, Unsecured Term Loan	2.711%	2/01/14	B	1,988,126
3,500		Level 3 Financing, Inc., Term Loan, Tranche B	5.250%	8/01/19	Ba2	3,543,204
9,500		Total Diversified Telecommunication Services				9,543,451
		Electric Utilities – 0.3% (0.2% of Total Investments)
2,022		TXU Corporation, 2014 Term Loan	3.749%	10/10/14	B2	1,366,166
		Electrical Equipment – 0.6% (0.4% of Total Investments)
2,500		Sensus Metering Systems, Inc., Term Loan, Second Lien	8.500%	5/09/18	B-	2,506,250
		Electronic Equipment & Instruments – 0.7% (0.5% of Total Investments)
3,465		Smart Modular Technologies, Inc., Term Loan	8.250%	8/26/17	B+	2,806,650
		Energy Equipment & Services – 0.4% (0.3% of Total Investments)
1,500		Pinnacle Holdco S.A.R.L., Term Loan, First Lien	6.500%	7/24/19	B+	1,502,344
		Food & Staples Retailing – 2.2% (1.5% of Total Investments)
1,350		BJ Wholesale Club, Inc., Term Loan, First Lien	5.750%	9/26/19	B	1,366,172
500		BJ’s Wholesale Club Inc., Second Lien Term Loan	9.750%	3/26/20	CCC+	511,625
1,800		Wendy’s/Arby’s Restaurants, Inc., Term Loan B	4.750%	5/15/19	BB-	1,818,938
5,000		Wilton Products, Inc., Tranche B, Term Loan	7.500%	8/30/18	B1	5,053,125
8,650		Total Food & Staples Retailing				8,749,860
		Food Products – 3.9% (2.6% of Total Investments)
3,000		AdvancePierre Foods, Inc., Term Loan, First Lien	5.750%	7/10/17	B1	3,028,749
900		AdvancePierre Foods, Inc., Term Loan, Second Lien	9.500%	10/10/17	CCC+	913,875
11,470		U.S. Foodservice, Inc., Extended Term Loan	5.750%	3/31/17	B-	11,327,065
15,370		Total Food Products				15,269,689
		Gas Utilities – 0.7% (0.4% of Total Investments)
2,560		EquiPower Resources Holdings LLC, Term Loan, First Lien	6.500%	12/19/18	BB+	2,589,053
		Health Care Equipment & Supplies – 2.6% (1.8% of Total Investments)
6,948		Chiron Merger Sub, Inc., Term Loan	7.000%	5/04/18	Ba2	7,051,712
225		Fenwal, Inc., Delayed Term Loan	2.672%	2/28/14	B+	224,956
714		Fenwal, Inc., Term Loan	2.672%	2/28/14	B+	713,798
2,182		Hologic, Inc., Term Loan B	4.500%	8/01/19	BBB-	2,209,534
10,069		Total Health Care Equipment & Supplies				10,200,000
		Health Care Providers & Services – 8.3% (5.7% of Total Investments)
4,000		DaVita, Inc., New Term Loan B2, WI/DD	TBD	TBD	Ba2	4,016,668
1,500		Genesis Healthcare LLC, Term Loan, DD1	10.000%	10/02/18	B	1,447,500
2,993		Gentiva Health Services, Inc., Term Loan B	6.500%	8/17/16	B1	2,956,719
7,750		Golden Living, Term Loan	5.000%	5/04/18	B+	7,483,141
997		Health Management Associates, Inc., Term Loan B	4.500%	11/16/18	BB-	1,007,737
2,217		Kindred Healthcare, Term Loan	5.250%	6/01/18	Ba3	2,190,544
1,397		LHP Operations Co. LLC, Term Loan B	9.000%	7/03/18	B	1,410,465
98		LifeCare Holdings, Inc., Term Loan Add On	8.093%	2/01/16	N/R	92,149
542		LifeCare, Term Loan	8.093%	2/01/16	N/R	510,872
1,602		MultiPlan, Inc., Term Loan B	4.750%	8/26/17	Ba3	1,610,892
3,000		National Mentor Holdings, Inc., Term Loan B, WI/DD	TBD	TBD	B+	3,008,751
4,197		Select Medical Corporation, Term Loan	5.500%	6/01/18	BB-	4,233,598
1,500		Sheridan Holdings, Inc., Term Loan, Second Lien	9.000%	7/01/19	B-	1,515,000
1,308		Skilled Healthcare Group, Inc., Term Loan	6.750%	4/09/16	B1	1,315,867
6		Vanguard Health Holding Company II LLC, Initial Term Loan	5.000%	1/29/16	Ba2	5,940
33,107		Total Health Care Providers & Services				32,805,843
		Health Care Technology – 1.8% (1.2% of Total Investments)
4,774		Emdeon Business Services LLC, Term Loan B1	5.000%	11/02/18	BB-	4,829,454
350		Fenwal, Inc., Term Loan, Second Lien	5.672%	8/28/14	B	349,689
1,750		U.S. Renal Care, Inc., Term Loan, Second Lien	10.250%	12/02/19	CCC+	1,795,938
6,874		Total Health Care Technology				6,975,081
		Hotels, Restaurants & Leisure – 2.9% (2.0% of Total Investments)
2,933		24 Hour Fitness Worldwide, Inc., New Term Loan	7.500%	4/22/16	Ba3	2,967,323
3,276		Caesars Entertainment Operating Company, Inc., Term Loan B6	5.461%	1/28/18	B	2,950,725
1,439		CCM Merger, Inc. Term Loan	6.000%	3/01/17	B+	1,452,090
2,985		Landry’s Restaraunts, Inc., Term Loan B	6.500%	4/24/18	B+	3,021,692
1,246		Shingle Springs Tribal Gaming Authority, Term Loan	10.500%	12/17/13	N/R	1,177,635
11,879		Total Hotels, Restaurants & Leisure				11,569,465
		Household Durables – 0.5% (0.3% of Total Investments)
2,000		AOT Bedding Super Holdings LLC, Term Loan B	4.172%	8/29/19	B+	2,002,084
		Household Products – 0.7% (0.5% of Total Investments)
2,831		Spectrum Brands, Inc., Term Loan	5.018%	6/17/16	Ba3	2,841,693
		Independent Power Producers & Energy Traders – 0.4% (0.3% of Total Investments)
1,500		Equipower Resources Holdings LLC, Term Loan, Second Lien	10.000%	6/19/19	BB	1,529,374
		Industrial Conglomerates – 0.6% (0.4% of Total Investments)
420		Evertec, Inc., Term Loan	5.500%	9/30/16	BB-	420,546
1,965		U.S. Foodservice, Inc., Term Loan, First Lien	5.750%	3/31/17	B-	1,940,499
2,385		Total Industrial Conglomerates				2,361,045
		Insurance – 0.6% (0.4% of Total Investments)
2,500		Vantage Drilling Company, Term Loan B, WI/DD	TBD	TBD	B-	2,427,082
		Internet Software & Services – 4.1% (2.8% of Total Investments)
2,236		Go Daddy Group Inc, First Lien Term Loan	5.500%	12/17/18	Ba3	2,230,019
745		Open Solutions, Inc., Term Loan B	2.435%	1/23/14	B+	720,040
2,000		Sabre, Inc., Incremental Term Loan	7.250%	12/29/17	B1	2,024,166
2,386		Sabre, Inc., Extended Term Loan, First Lien	5.962%	9/30/17	B1	2,376,263
2,000		San Juan Cable LLC, Term Loan, Second Lien	10.000%	6/09/18	CCC+	2,050,000
2,925		SSI Investments II, Ltd., New Term Loan	5.000%	5/26/17	Ba3	2,957,996
3,797		WebCom Group Inc., First Lien	11.000%	10/27/18	Ba3	3,801,412
16,089		Total Internet Software & Services				16,159,896
		IT Services – 4.1% (2.8% of Total Investments)
4,086		First Data Corporation, Extended Term Loan B	5.211%	3/24/17	B+	4,044,520
2,753		Frac Tech International LLC, Term Loan	8.500%	5/06/16	B+	2,487,191
750		Genpact International, Inc., Term Loan	4.250%	8/30/19	BB+	752,812
1,425		Sabre, Inc., New Extended Term Loan	5.962%	12/29/17	B1	1,419,653
1,602		VFH Parent LLC, Term Loan	7.500%	7/08/16	Ba1	1,615,802
923		Web.com, Term Loan, Second Lien	11.000%	10/27/18	B3	951,922
4,788		Zayo Group LLC, Term Loan B	5.250%	7/02/19	B1	4,823,910
16,327		Total IT Services				16,095,810
		Leisure Equipment & Products – 1.2% (0.8% of Total Investments)
3,150		Academy, Ltd., Term Loan	6.000%	8/03/18	B	3,159,551
1,681		BLB Management Services, Inc., Term Loan	8.500%	11/05/15	BB	1,694,039
4,831		Total Leisure Equipment & Products				4,853,590
		Machinery – 0.8% (0.5% of Total Investments)
1,250		Navistar International Corporation, Term Loan B	7.000%	8/16/17	Ba2	1,260,156
1,787		Rexnord Corporation, Inc., Term Loan B Refinancing	4.500%	4/01/18	BB	1,801,015
3,037		Total Machinery				3,061,171
		Media – 9.3% (6.3% of Total Investments)
1,107		Atlantic Broadband Finance LLC, Term Loan B, WI/DD	TBD	TBD	Ba3	1,119,763
3,884		Cengage Learning Inc., Term Loan B	5.720%	7/04/17	B	3,553,445
2,529		Cumulus Media, Inc., Term Loan, First Lien	5.750%	9/17/18	Ba2	2,547,336
3,000		Cumulus Media, Inc., Term Loan, Second Lien	7.500%	9/16/19	B2	3,045,750
1,000		FoxCo Acquisition Sub LLC, Initial Term Loan	5.500%	7/14/17	B+	1,015,000
2,000		Mediacom Broadband LLC, Tranche G, Term Loan	4.000%	1/20/20	Ba3	2,000,000
3,455		Radio One, Inc., Term Loan B, First Lien	7.500%	2/14/17	B+	3,481,287
2,513		Tribune Company, Term Loan B, (5)	0.000%	6/04/14	Ca	1,930,552
8,600		Univision Communications, Inc., Term Loan	4.462%	3/31/17	B+	8,439,061
2,143		UPC Broadband Holding BV, Term Loan, Tranche AB	4.750%	12/31/17	Ba3	2,158,928
6,584		WideOpenWest Finance LLC, Term Loan B, DD1	6.250%	7/12/18	B1	6,654,569
3,050		Yell Group PLC, Term Loan, (5)	4.459%	7/31/14	N/R	579,414
39,865		Total Media				36,525,105
		Metals & Mining – 1.0% (0.7% of Total Investments)
3,875		Fortescue Metals Group Term Loan B, WI/DD	TBD	TBD	BBB-	3,865,312
		Multiline Retail – 0.5% (0.4% of Total Investments)
1,128		99 Cents Only Stores, Term Loan B1	5.250%	1/11/19	B+	1,142,801
931		Bass Pro Group LLC, Term Loan B	5.250%	6/13/17	BB-	940,761
2,059		Total Multiline Retail				2,083,562
		Oil, Gas & Consumable Fuels – 4.6% (3.2% of Total Investments)
655		Alon USA Energy, Inc., Edgington Facility	4.500%	8/05/13	B+	651,684
5,236		Alon USA Energy, Inc., Paramount Facility	4.500%	8/05/13	B+	5,213,334
992		CCS Income Trust, Delayed Term Loan	3.212%	11/14/14	B	977,236
2,872		CCS Income Trust, Term Loan	3.212%	11/14/14	B1	2,828,184
1,461		Crestwood Holdings, Inc., Term Loan B	9.750%	3/26/18	CCC+	1,483,296
1,650		Everest Acquisition LLC Term Loan	0.425%	5/24/18	Ba3	1,664,953
748		Gibson Energy ULC, Term Loan B	4.750%	5/18/18	BB-	757,057
3,000		Plains Exploration and Production Company, Term Loan, WI/DD	TBD	TBD	Ba1	3,017,412
1,667		Samson Investment Company, Initial Term Loan, Second Lien	6.000%	9/25/18	B+	1,684,115
18,281		Total Oil, Gas & Consumable Fuels				18,277,271
		Paper & Forest Products – 0.9% (0.6% of Total Investments)
3,642		Newark Group, Inc., DIP Term Loan	12.500%	3/31/14	Caa1	3,587,285
		Personal Products – 0.3% (0.2% of Total Investments)
1,330		Prestige Brands, Inc., Term Loan 1	5.278%	1/27/19	BB-	1,346,521
		Pharmaceuticals – 8.4% (5.7% of Total Investments)
1,000		Bausch & Lomb, Inc., Delayed Draw, Term Loan	4.750%	9/30/15	B+	1,010,000
5,985		Bausch & Lomb, Inc., Term Loan B	5.250%	5/17/19	B+	6,059,812
2,168		ConvaTec Healthcare, Incremental Term Loan B	5.000%	12/22/16	Ba3	2,184,589
1,500		Generic Drug Holdings, Inc., Term Loan B, WI/DD	TBD	TBD	B+	1,508,750
3,125		Graceway Pharmaceuticals LLC, Second Lien Term Loan, (5)	0.000%	5/03/13	N/R	93,750
180		Graceway Pharmaceuticals LLC, Term Loan, (5)	0.000%	5/03/12	N/R	209,106
2,292		Par Pharmaceutical Companies, Inc., Term Loan B	5.000%	9/28/19	B+	2,290,645
3,970		Pharmaceutical Product Development, Inc., Term Loan	6.250%	12/05/18	Ba3	4,023,349
3,950		Quintiles Transnational Corporation, Term Loan B	5.000%	6/08/18	BB-	3,982,588
3,142		Valeant Pharmaceuticals International, Inc., Tranche B, Term Loan D	4.250%	2/13/19	BBB-	3,159,407
982		Warner Chilcott Company LLC, Term Loan B1 Additional	4.250%	3/15/18	BBB-	987,148
2,586		Warner Chilcott Corporation, Term Loan B1	4.250%	3/15/18	BBB-	2,599,406
1,293		Warner Chilcott Corporation, Term Loan B2	4.250%	3/15/18	BBB-	1,299,703
1,778		Warner Chilcott Corporation, Term Loan B3	4.250%	3/15/18	BBB-	1,787,092
1,667		Warner Chilcott Corporation, Term Loan B4	3.261%	8/15/17	BBB-	1,667,708
333		Warner Chilcott Corporation, Term Loan B5	3.261%	8/20/17	BBB-	333,542
35,951		Total Pharmaceuticals				33,196,595
		Real Estate Investment Trust – 1.4% (0.9% of Total Investments)
3,500		iStar Financial, Inc., Term Loan	5.750%	10/15/17	BB-	3,501,642
1,913		Walter Investment Management Corporation, Term Loan, First Lien	7.750%	6/30/16	B+	1,924,453
5,413		Total Real Estate Investment Trust				5,426,095
		Real Estate Management & Development – 3.3% (2.2% of Total Investments)
5,540		Capital Automotive LP, Tranche B	5.250%	3/11/17	Ba3	5,590,279
2,500		Homeward Residential Holdings, Inc., Initial Term Loan	8.250%	8/08/17	B+	2,517,188
1,268		LNR Property Corporation, Term Loan	4.750%	4/29/16	BB+	1,272,382
3,457		Realogy Corporation, Delayed Term Loan	4.464%	10/10/16	B+	3,454,794
12,765		Total Real Estate Management & Development				12,834,643
		Road & Rail – 1.3% (0.9% of Total Investments)
5,279		Swift Transportation Company, Inc., Term Loan, Tranche B2	5.000%	12/21/17	BB	5,322,103
		Semiconductors & Equipment – 1.0% (0.7% of Total Investments)
2,950		NXP Semiconductor LLC, Term Loan	4.500%	3/03/17	B-	2,996,771
973		Spansion LLC, Term Loan	4.750%	2/09/15	BB+	983,488
3,923		Total Semiconductors & Equipment				3,980,259
		Software – 10.5% (7.2% of Total Investments)
5,888		Attachmate Corporation, Term Loan, First Lien	7.250%	11/22/17	BB-	5,955,206
5,010		BlackBoard, Inc., Term Loan, First Lien	7.500%	10/04/18	B+	5,055,165
2,656		DataTel Inc., Term Loan B	6.250%	7/19/18	B+	2,696,934
1,000		Deltek, Inc., Term Loan, Second Lien	10.000%	10/10/19	CCC+	1,011,667
11,097		Infor Enterprise Applications, Term Loan B	5.250%	4/05/18	Ba3	11,230,698
3,380		IPC Systems, Inc., Term Loan, First Lien	7.750%	7/31/17	B-	3,261,276
4,000		IPC Systems, Inc., Term Loan, Second Lien	5.462%	6/01/15	CCC	3,460,000
4,750		Misys PLC, Term Loan, First Lien	7.250%	12/12/18	Ba3	4,770,781
3,503		SS&C Technologies, Inc./ Sunshine Acquisition II, Inc., Funded Term Loan B1	5.000%	6/07/19	BB-	3,548,216
362		SS&C Technologies, Inc./ Sunshine Acquisition II, Inc., Funded Term Loan B2	5.000%	6/07/19	BB-	366,490
41,646		Total Software				41,356,433
		Specialty Retail – 2.6% (1.8% of Total Investments)
1,375		Collective Brands Inc., Term Loan B	7.250%	10/09/19	B1	1,384,453
2,820		Jo-Ann Stores, Inc., Term Loan	4.750%	3/16/18	B+	2,824,713
496		Lord & Taylor Holdings LLC, Term Loan	5.750%	1/11/19	BB	500,113
2,313		Party City Corporation, Term Loan	5.750%	7/27/19	B1	2,337,648
1,437		Toys “R” Us - Delaware Inc., Term Loan	5.250%	5/17/18	B+	1,410,175
1,710		Toys “R” Us - Delaware Inc., Term Loan B	6.000%	9/01/16	B+	1,707,149
10,151		Total Specialty Retail				10,164,251
		Textiles, Apparel & Luxury Goods – 0.5% (0.3% of Total Investments)
2,000		Wolverine World Wide, Inc., Term Loan B, WI/DD	TBD	TBD	BB	2,023,750
		Wireless Telecommunication Services – 3.7% (2.6% of Total Investments)
4,569		Asurion LLC, Term Loan, First Lien	5.500%	5/24/18	BB-	4,607,030
8,736		Clear Channel Communications, Inc., Tranche B, Term Loan, DD1	3.862%	1/29/16	CCC+	7,258,036
2,000		IPC Systems, Inc., Term Loan, Tranche C, First Lien	7.750%	7/31/17	B1	1,966,250
934		Presidio, Inc., New Term Loan	5.750%	3/31/17	Ba3	936,670
16,239		Total Wireless Telecommunication Services				14,767,986
$	465,596	Total Variable Rate Senior Loan Interests (cost $452,518,565)				455,338,875

Shares		Description (1)				Value
		Common Stocks – 2.7% (1.8% of Total Investments)
		Building Products – 1.1% (0.7% of Total Investments)
124,402		Masonite Worldwide Holdings, (6), (11)				$		4,416,271
		Hotels, Restaurants & Leisure – 0.1% (0.1% of Total Investments)
42,041		BLB Worldwide Holdings Inc., (6), (11)				578,064
		Media – 1.5% (1.0% of Total Investments)
182,499		Metro-Goldwyn-Mayer, (6), (11)				5,754,430
		Total Common Stocks (cost $16,996,423)				10,748,765

Principal
Amount (000)		Description (1)	Coupon	Maturity	Ratings (3)	Value
		Convertible Bonds – 0.4% (0.3% of Total Investments)
		Communications Equipment – 0.4% (0.3% of Total Investments)
$	550	Nortel Networks Corp., (5)	1.750%	4/15/13	N/R	$		550,688
1,000		Nortel Networks Corp., (5)	2.125%	4/15/14	D	1,000,000
$	1,550	Total Convertible Bonds (cost $1,307,500)				1,550,688

Principal
Amount (000)		Description (1)	Coupon	Maturity	Ratings (3)	Value
		Corporate Bonds – 14.4% (9.8% of Total Investments)
		Commercial Services & Supplies – 0.1% (0.1% of Total Investments)
$	500	Ceridian Corporation	11.250%	11/15/15	CCC	$		487,500
		Communications Equipment – 1.0% (0.7% of Total Investments)
1,000		Avaya Inc.	10.125%	11/01/15	CCC+	887,500
1,750		Avaya Inc.	9.750%	11/01/15	CCC+	1,557,500
1,000		Nortel Networks Limited, (5)	9.003%	7/15/13	N/R	1,050,000
450		Nortel Networks Limited, (5)	10.750%	7/15/16	N/R	502,875
4,200		Total Communications Equipment				3,997,875
		Distributors – 0.3% (0.2% of Total Investments)
1,000		HD Supply Inc., 144A	8.125%	4/15/19	B+	1,100,000
		Diversified Telecommunication Services – 0.8% (0.5% of Total Investments)
1,500		IntelSat Bermuda Limited	11.500%	2/04/17	CCC+	1,578,750
1,500		IntelSat Bermuda Limited	11.250%	2/04/17	CCC+	1,575,000
3,000		Total Diversified Telecommunication Services				3,153,750
		Health Care Equipment & Supplies – 1.8% (1.2% of Total Investments)
2,450		Chiron Merger Sub Inc., 144A	10.500%	11/01/18	B	2,609,250
2,500		Merge Healthcare Inc.	11.750%	5/01/15	B+	2,681,250
1,750		Rotech Healthcare Inc.	10.750%	10/15/15	B3	1,706,250
6,700		Total Health Care Equipment & Supplies				6,996,750
		Health Care Providers & Services – 2.5% (1.7% of Total Investments)
2,000		Aurora Diagnostics Holdings LLC	10.750%	1/15/18	B3	2,020,000
2,750		HCA Inc., (7)	8.500%	4/15/19	BB+	3,090,313
1,000		LifeCare Holdings Inc.	9.250%	8/15/13	C	360,000
250		Rotech Healthcare Inc.	10.500%	3/15/18	CCC-	143,125
3,000		Select Medical Corporation	6.494%	9/15/15	B-	2,985,000
1,000		Wolverine Healthcare Analytics, 144A	10.625%	6/01/20	CCC+	1,072,500
10,000		Total Health Care Providers & Services				9,670,938
		Household Products – 0.8% (0.5% of Total Investments)
2,750		Sprectum Brands Inc.	9.500%	6/15/18	Ba3	3,086,875
		IT Services – 0.8% (0.6% of Total Investments)
2,000		First Data Corporation, 144A	7.375%	6/15/19	BB-	2,070,000
1,228		First Data Corporation	10.550%	9/24/15	B-	1,258,995
3,228		Total IT Services				3,328,995
		Machinery – 0.5% (0.3% of Total Investments)
2,000		NES Rental Holdings Inc., 144A	12.250%	4/15/15	CCC+	2,005,000
		Media – 3.2% (2.2% of Total Investments)
2,000		Clear Channel Communications, Inc., 144A	9.000%	12/15/19	CCC+	1,800,000
5,500		Clear Channel Communications, Inc.	5.500%	9/15/14	CCC-	5,142,500
3,750		Clear Channel Communications, Inc.	10.750%	8/01/16	CCC-	2,775,000
3,600		Clear Channel Communications, Inc.	6.875%	6/15/18	CCC-	2,250,000
400		WMG Acquisition Group	11.500%	10/01/18	B-	451,000
15,250		Total Media				12,418,500
		Metals & Mining – 0.4% (0.3% of Total Investments)
1,750		Molycorp Inc., 144A	10.000%	6/01/20	B3	1,684,375
		Multiline Retail – 0.1% (0.1% of Total Investments)
500		Number Merger Sub Inc., 144A	11.000%	12/15/19	Caa1	567,500
		Pharmaceuticals – 0.8% (0.6% of Total Investments)
2,000		Valeant Pharmaceuticals International, 144A	7.000%	10/01/20	BB-	2,152,500
1,000		Valeant Pharmaceuticals International, 144A	7.250%	7/15/22	BB-	1,082,500
3,000		Total Pharmaceuticals				3,235,000
		Road & Rail – 0.5% (0.3% of Total Investments)
2,000		Avis Budget Car Rental	2.967%	5/15/14	B+	1,997,500
		Software – 0.8% (0.5% of Total Investments)
850		Infor Us Inc.	11.500%	7/15/18	B-	983,875
1,875		Infor Us Inc.	9.375%	4/01/19	B-	2,071,875
2,725		Total Software				3,055,750
$	58,603	Total Corporate Bonds (cost $53,534,164)				56,786,308

Principal
Amount (000)		Description (1)	Coupon	Maturity	Ratings (3)	Value
		Asset-Backed Securities – 6.3% (4.3% of Total Investments)
$	800	Bluemountain Collateralized Loan Obligation, Series 2012 2A E14, WI/DD	1.000%	11/20/24	N/R	$		721,760
2,500		BlueMountain Collateralized Loan Obligations Limited 2012-1A, 144A	6.314%	7/20/23	BB	2,267,825
1,300		Dryden Senior Loan Fund 2012-24A	5.117%	11/15/23	N/R	1,260,090
1,500		Flatiron Collateralized Loan Obligation Limited, Series 2011-1A	4.740%	1/15/23	BB	1,326,312
1,500		Fraser Sullivan Collateralized Loan Obligations Limited, Series 2011-6A, 144A	5.934%	11/22/22	BB	1,403,441
2,000		LCM Limited Partnership, Collateralized Loan Obligations, 144A	6.084%	4/15/22	BB	1,882,632
1,200		LCM Limited Partnership, Collateralized Loan Obligations, 144A	4.934%	4/15/22	BBB	1,175,168
1,500		LCM Limited Partnership, Collateralized Loan Obligations	5.471%	4/19/22	BB	1,347,056
1,800		LCM Limited Partneship Series 2012A, 144A	6.159%	10/19/22	BB	1,656,412
1,500		Madoson Park Funding Limited, Collateralized Loan Obligations, Series 2012-8A, 144A	5.669%	4/22/22	BB	1,381,650
1,000		Madoson Park Funding Limited, Collateralized Loan Obligations, Series 2012-8A, 144A	4.669%	4/22/22	BBB	976,261
1,200		Magnetite IV CLO Limited, Series 2012-6A E, 144A	6.162%	9/15/23	BB	1,121,501
2,240		Oak Hill Credit Partners, Series 2012-7A, WI/DD	1.000%	11/20/23	N/R	1,999,016
2,000		Race Point Collateralized Loan Obkigation Series 2012-7A, 144A	1.000%	11/08/24	N/R	1,791,448
2,500		Race Point Collateralized Loan Obligations, Series 2011-5A, 144A	6.889%	12/15/22	BB	2,498,753
2,000		Race Point Collateralized Loan Obligations, Series 2012-6A, 144A	5.931%	5/24/23	BB	1,852,661
$	26,540	Total Asset-Backed Securities (cost $22,843,014)				24,661,986

Principal
Amount (000)		Description (1)	Coupon	Maturity		Value
		Short-Term Investments – 7.3% (5.0% of Total Investments)
$	28,919	Repurchase Agreement with Fixed Income Clearing Corporation, dated 10/31/12, repurchase price $28,919,079, collateralized by $27,960,000 U.S. Treasury Notes, 2.500%, due 3/31/15, value $29,497,800	0.010%	11/01/12		$	28,919,071
		Total Short-Term Investments (cost $28,919,071)				28,919,071
		Total Investments (cost $576,118,737) – 146.5%				578,005,693
		Borrowings – (40.5)% (8), (9)				(159,900,000			)
		Other Assets Less Liabilities – (6.0)% (10)				(23,555,927			)
		Net Assets Applicable to Common Shares – 100%				$	394,549,766

Investments in Derivatives at October 31, 2012

Interest Rate Swaps outstanding:

Fund

Fixed Rate

Unrealized

Notional

Pay/Receive

Payment

Termination

Appreciation

Counterparty

Amount

Floating Rate

Floating Rate Index

Fixed Rate*

Frequency

Date

(Depreciation) (10)

Goldman Sachs

$29,317,500

Receive

1-Month USD-LIBOR

1.300%

Monthly

4/20/14

$ (461,478)

Morgan Stanley

29,317,500

Receive

1-Month USD-LIBOR

2.201

Monthly

4/20/16

(1,778,650)

$ (2,240,128)

*Annualized.

		Fair Value Measurements Fair value is defined as the price that the Fund would receive upon selling an investment or transferring a liability in an orderly transaction to an independent buyer in the principal or most advantageous market for the investment. A three-tier hierarchy is used to maximize the use of observable market data and minimize the use of unobservable inputs and to establish classification of fair value measurements for disclosure purposes. Observable inputs reflect the assumptions market participants would use in pricing the asset or liability. Observable inputs are based on market data obtained from sources independent of the reporting entity. Unobservable inputs reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability. Unobservable inputs are based on the best information available in the circumstances. The following is a summary of the three-tiered hierarchy of valuation input levels.

		Level 1 – Inputs are unadjusted and prices are determined using quoted prices in active markets for identical securities. Level 2 – Prices are determined using other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.). Level 3 – Prices are determined using significant unobservable inputs (including management’s assumptions in determining the fair value of investments).

		The inputs or methodologies used for valuing securities are not an indication of the risks associated with investing in those securities. The following is a summary of the Fund’s fair value measurements as of the end of the reporting period:

Level 1

Level 2

Level 3

Total

Long-Term Investments*:

Variable Rate Senior Loan Interests

–

455,338,875

–

455,338,875

Common Stocks

–

10,748,765

–

10,748,765

Convertible Bonds

–

1,550,688

–

1,550,688

Corporate Bonds

–

56,786,308

–

56,786,308

Asset-Backed Securities

–

24,661,986

–

24,661,986

Short-Term Investments:

Repurchase Agreements

–

28,919,071

–

28,919,071

Derivatives:

Interest Rate Swaps**

–

(2,240,128

)

–

(2,240,128

)

Total

–

575,765,565

–

575,765,565

* Refer to the Fund’s Portfolio of Investments for industry classifications and breakdown of Common Stocks classified as Level 2.

** Represents net unrealized appreciation (depreciation) as reported in the Fund’s Portfolio of Investments.

The Nuveen funds’ Board of Directors/Trustees is responsible for the valuation process and has delegated the oversight of the daily valuation process to the Adviser’s Valuation Committee. The Valuation Committee, pursuant to the valuation policies and procedures adopted by the Board of Directors/Trustees, is responsible for making fair value determinations, evaluating the effectiveness of the funds’ pricing policies, and reporting to the Board of Directors/Trustees. The Valuation Committee is aided in its efforts by the Adviser’s dedicated Securities Valuation Team, which is responsible for administering the daily valuation process and applying fair value methodologies as approved by the Valuation Committee. When determining the reliability of independent pricing services for investments owned by the funds, the Valuation Committee, among other things, conducts due diligence reviews of the pricing services and monitors the quality of security prices received through various testing reports conducted by the Securities Valuation Team.

The Valuation Committee will consider pricing methodologies it deems relevant and appropriate when making fair value determinations. Examples of possible methodologies include, but are not limited to, multiple of earnings; discount from market of a similar freely traded security; discounted cash-flow analysis; book value or a multiple thereof; risk premium/yield analysis; yield to maturity; and/or fundamental investment analysis. The Valuation Committee will also consider factors it deems relevant and appropriate in light of the facts and circumstances. Examples of possible factors include, but are not limited to, the type of security; the issuer’s financial statements; the purchase price of the security; the discount from market value of unrestricted securities of the same class at the time of purchase; analysts’ research and observations from financial institutions; information regarding any transactions or offers with respect to the security; the existence of merger proposals or tender offers affecting the security; the price and extent of public trading in similar securities of the issuer or comparable companies; and the existence of a shelf registration for restricted securities.

For each portfolio security that has been fair valued pursuant to the policies adopted by the Board of Directors/Trustees, the fair value price is compared against the last available and next available market quotations. The Valuation Committee reviews the results of such testing and fair valuation occurrences are reported to the Board of Directors/Trustees.

Derivative Instruments and Hedging Activities

The Fund records derivative instruments at fair value, with changes in fair value recognized on the Statement of Operations, when applicable. Even though the Fund’s investments in derivatives may represent economic hedges, they are not considered to be hedge transactions for financial reporting purposes.

The following table presents the fair value of all derivative instruments held by the Fund as of October 31, 2012, the location of these instruments on the Statement of Assets and Liabilities, and the primary underlying risk exposure.

Location on the Statement of Assets and Liabilities

Underlying

Derivative

Asset Derivatives

Liability Derivatives

Risk Exposure

Instrument

Location

Value

Location

Value

Interest Rate

Swaps

—

Unrealized depreciation on interest rate swaps

(2,240,128

)

Income Tax Information

The following information is presented on an income tax basis. Differences between amounts for financial statement and federal income tax purposes are primarily due to the treatment of paydown gains and losses, timing differences in recognizing certain gains and losses on investment transactions, and recognition of premium amortization. To the extent that differences arise that are permanent in nature, such amounts are reclassified within the capital accounts on the Statement of Assets and Liabilities presented in the annual report, based on their federal tax basis treatment; temporary differences do not require reclassification. Temporary and permanent differences do not impact the net asset value of the Fund.

At October 31, 2012, the cost of investments (excluding investments in derivatives), was $576,391,232.

Gross unrealized appreciation and gross unrealized depreciation of investments (excluding investments in derivatives), at October 31, 2012, were as follows:

Gross unrealized:

Appreciation

18,068,862

Depreciation

(16,454,401

)

Net unrealized appreciation (depreciation) of investments

1,614,461

For Fund portfolio compliance purposes, the Fund’s industry classifications refer to any one or more of the industry sub-classifications used by one or more widely recognized market indexes or ratings group indexes, and/or as defined by Fund management. This definition may not apply for purposes of this report, which may combine industry sub-classifications into sectors for reporting ease.

(1)

All percentages shown in the Portfolio of Investments are based on net assets applicable to Common shares unless otherwise noted.

(2)

Senior Loans generally are subject to mandatory and/or optional prepayment. Because of these mandatory prepayment conditions and because there may be significant economic incentives for a borrower to prepay, prepayments of Senior Loans may occur. As a result, the actual remaining maturity of Senior Loans held may be substantially less than the stated maturities shown.

(3)

Ratings: Using the highest of Standard & Poor’s Group (“Standard & Poor’s”), Moody’s Investors Service, Inc. (“Moody’s”) or Fitch, Inc. (“Fitch”) rating. Ratings below BBB by Standard & Poor’s, Baa by Moody’s or BBB by Fitch are considered to be below investment grade. Holdings designated N/R are not rated by any of these national rating agencies.

(4)

Senior Loans generally pay interest at rates which are periodically adjusted by reference to a base short-term, floating lending rate plus an assigned fixed rate. These floating lending rates are generally (i) the lending rate referenced by the London Inter-Bank Offered Rate (“LIBOR”), or (ii) the prime rate offered by one or more major United States banks.

Senior Loans may be considered restricted in that the Fund ordinarily is contractually obligated to receive approval from the Agent Bank and/or Borrower prior to the disposition of a Senior Loan.

(5)

At or subsequent to the end of the reporting period, this security is non-income producing. Non-income producing security, in the case of a bond, generally denotes that the issuer has (1) defaulted on the payment of principal or interest, (2) is under the protection of the Federal Bankruptcy Court or (3) the Fund’s Adviser has concluded that the issue is not likely to meet its future interest payment obligations and has directed the Fund’s custodian to cease accruing additional income on the Fund’s records.

(6)

Non-income producing; issuer has not declared a dividend within the past twelve months.

(7)

Investment, or portion of investment, has been pledged as collateral for investments in derivatives.

(8)

Borrowings as a percentage of Total Investments is 27.7%.

(9)

The Fund segregates 100% of its eligible investments in the Portfolio of Investments as collateral for Borrowings.

(10)

Other Assets Less Liabilities includes the net Unrealized Appreciation (Depreciation) of derivative instruments as listed within Investments in Derivatives at the end of the reporting period.

(11)

For fair value measurement disclosure purposes, Common Stock categorized as Level 2.

N/R

Not rated.

N/A

Not applicable.

DD1

Investment or portion of investment purchased on a delayed delivery basis.

WI/DD

Purchased on a when-issued or delayed delivery basis.

144A

Investment is exempt from registration under Rule 144A of the Securities Act of 1933, as amended. These investments may only be resold in transactions exempt from registration, which are normally those transactions with qualified institutional buyers.

TBD

Senior Loan purchased on a when-issued or delayed-delivery basis. Certain details associated with this purchase are not known prior to the settlement date of the transaction. In addition, Senior Loans typically trade without accrued interest and therefore a coupon rate is not available prior to settlement. At settlement, if still unknown, the borrower or counterparty will provide the Fund with the final coupon rate and maturity date.

USD-LIBOR

United States Dollar-London Inter-Bank Offered Rate

Item 2. Controls and Procedures.

a. The registrant’s principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the “1940 Act”) (17 CFR 270.30a-3(c))) are effective, as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of the controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rule 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934 (17 CFR 240.13a-15(b) or 240.15d-15(b)).

b. There were no changes in the registrant’s internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d)) that occurred during the registrant’s last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant’s internal control over financial reporting.

Item 3. Exhibits.

File as exhibits as part of this Form a separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the 1940 Act (17 CFR 270.30a-2(a)), exactly as set forth below: EX-99 CERT Attached hereto.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

(Registrant) Nuveen Floating Rate Income Opportunity Fund

By (Signature and Title)	/s/ Kevin J. McCarthy
	Kevin J. McCarthy
	Vice President and Secretary

Date: December 28, 2012

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By (Signature and Title)	/s/ Gifford R. Zimmerman
	Gifford R. Zimmerman
	Chief Administrative Officer (principal executive officer)

Date: December 28, 2012

By (Signature and Title)	/s/ Stephen D. Foy
	Stephen D. Foy
	Vice President and Controller (principal financial officer)

Date: December 28, 2012