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CALAMOS CONVERTIBLE OPPORTUNITIES & INCOME FUND

Regulatory Filings Sep 18, 2012

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N-Q 1 d382673dnq.htm N-Q N-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED

MANAGEMENT INVESTMENT COMPANIES

INVESTMENT COMPANY ACT FILE NUMBER: 811-21080

EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Convertible Opportunities and Income Fund

ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563-2787
NAME AND ADDRESS OF AGENT FOR SERVICE: John P. Calamos, Sr., Chairman, CEO and Co-CIO Calamos Advisors LLC, 2020 Calamos Court, Naperville,
Illinois 60563-2787

REGISTRANT’S TELEPHONE NUMBER, INCLUDING AREA CODE: (630) 245-7200

DATE OF FISCAL YEAR END: October 31, 2012

DATE OF REPORTING PERIOD: July 31, 2012

ITEM 1. SCHEDULE OF INVESTMENTS JULY 31, 2012 (UNAUDITED)

Calamos Convertible Opportunities and Income Fund

SCHEDULE OF INVESTMENTS JULY 31, 2012 (UNAUDITED)

PRINCIPAL AMOUNT VALUE
CORPORATE BONDS (77.1%)
Consumer Discretionary (15.5%)
3,583,000 American Axle & Manufacturing, Inc.µ 7.875%, 03/01/17 $ 3,726,320
3,216,000 Asbury Automotive Group, Inc.µ 7.625%, 03/15/17 3,328,560
3,101,000 Cedar Fair, LPµ 9.125%, 08/01/18 3,506,068
5,614,000 Cooper Tire & Rubber Companyµ 8.000%, 12/15/19 6,042,067
4,945,000 Dana Holding Corp.µ 6.750%, 02/15/21 5,346,781
DISH Network Corp.
5,788,000 7.875%, 09/01/19µ 6,757,490
2,664,000 5.875%, 07/15/22* 2,757,240
2,412,000 7.125%, 02/01/16 2,674,305
4,594,000 Express, LLCµ 8.750%, 03/01/18 4,978,747
5,053,000 Gap, Inc.µ 5.950%, 04/12/21 5,350,728
Goodyear Tire & Rubber Companyµ
6,431,000 8.250%, 08/15/20 7,041,945
919,000 7.000%, 05/15/22 943,124
2,177,000 Hasbro, Inc.µ 6.600%, 07/15/28 2,471,766
Icahn Enterprises, LP
3,848,000 8.000%, 01/15/18 4,107,740
1,286,000 8.000%, 01/15/18µ* 1,372,805
1,038,000 Interpublic Group of Companies, Inc.µ 10.000%, 07/15/17 1,172,940
J.C. Penney Company, Inc.µ
2,861,000 6.375%, 10/15/36 2,077,801
2,636,000 7.125%, 11/15/23 2,329,565
Jaguar Land Rover, PLC*
4,594,000 8.125%, 05/15/21µ 4,904,095
2,159,000 7.750%, 05/15/18 2,310,130
5,384,000 Jarden Corp.µ 7.500%, 05/01/17 6,110,840
4,134,000 Lear Corp.µ 8.125%, 03/15/20 4,676,587
2,756,000 Liberty Media Corp.µ 8.250%, 02/01/30 2,866,240
Limited Brands, Inc.
2,756,000 7.600%, 07/15/37µ 2,766,335
1,104,000 5.625%, 02/15/22µ 1,161,960
721,000 6.950%, 03/01/33 709,284
Meritage Homes Corp.
2,332,000 7.000%, 04/01/22* 2,436,940
919,000 7.150%, 04/15/20 974,140
3,326,000 Phillips-Van Heusen Corp.µ 7.375%, 05/15/20 3,720,963
4,594,000 Royal Caribbean Cruises, Ltd.µ 7.500%, 10/15/27 4,680,137
4,025,000 Ryland Group, Inc. 6.625%, 05/01/20 4,216,188
Sally Holdings, LLC
1,442,000 5.750%, 06/01/22 1,548,348
919,000 6.875%, 11/15/19 1,030,429
Service Corp. International
6,431,000 7.500%, 04/01/27µ 6,752,550
919,000 7.625%, 10/01/18µ 1,070,635
PRINCIPAL AMOUNT — 919,000 7.000%, 05/15/19 VALUE — $ 1,004,008
919,000 Toll Brothers Finance Corp. 5.875%, 02/15/22 983,031
4,112,000 Vail Resorts, Inc. 6.500%, 05/01/19 4,451,240
3,978,000 Wynn Las Vegas, LLCµ 7.750%, 08/15/20 4,435,470
128,795,542
Consumer Staples (3.3%)
4,203,000 Darling International, Inc.µ 8.500%, 12/15/18 4,738,883
2,297,000 Dean Foods Companyµ 9.750%, 12/15/18 2,526,700
3,329,000 Elizabeth Arden, Inc.µ 7.375%, 03/15/21 3,678,545
4,564,000 JBS USA, LLCµ* 7.250%, 06/01/21 4,358,620
6,923,000 Post Holdings, Inc.µ* 7.375%, 02/15/22 7,251,842
4,594,000 Smithfield Foods, Inc.µ 7.750%, 07/01/17 5,122,310
27,676,900
Energy (17.9%)
22,049,000 NOK Aker Solutions, ASA‡ 6.660%, 06/06/17 3,658,037
2,215,000 Atwood Oceanics, Inc.µ 6.500%, 02/01/20 2,370,050
4,594,000 Berry Petroleum Companyµ 6.375%, 09/15/22 4,881,125
8,452,000 Bristow Group, Inc.µ 7.500%, 09/15/17 8,790,080
5,053,000 Calfrac Holdings, LPµ* 7.500%, 12/01/20 4,850,880
Calumet Specialty Products, LP
3,675,000 9.375%, 05/01/19µ 3,822,000
1,378,000 9.625%, 08/01/20* 1,460,680
7,350,000 Carrizo Oil & Gas, Inc.µ 8.625%, 10/15/18 7,993,125
5,512,000 Cimarex Energy Company 5.875%, 05/01/22 5,884,060
5,512,000 Clayton Williams Energy, Inc.µ 7.750%, 04/01/19 5,484,440
Frontier Oil Corp.
5,586,000 8.500%, 09/15/16µ 5,879,265
749,000 6.875%, 11/15/18 797,685
5,053,000 GulfMark Offshore, Inc.µ* 6.375%, 03/15/22 5,179,325
3,510,000 Helix Energy Solutions Group, Inc.* 9.500%, 01/15/16 3,681,112
2,756,000 Holly Energy Partners, LP* 6.500%, 03/01/20 2,886,910
1,865,000 HollyFrontier Corp.µ 9.875%, 06/15/17 2,074,813
Hornbeck Offshore Services, Inc.µ
2,692,000 8.000%, 09/01/17 2,893,900
919,000 5.875%, 04/01/20* 923,595
5,053,000 Laredo Petroleum, Inc.* 7.375%, 05/01/22 5,356,180
Linn Energy, LLC
4,594,000 8.625%, 04/15/20µ 5,007,460

See accompanying Notes to Schedule of Investments

Calamos Convertible Opportunities and Income Fund

SCHEDULE OF INVESTMENTS JULY 31, 2012 (UNAUDITED)

PRINCIPAL AMOUNT VALUE
1,837,000 6.250%, 11/01/19µ* $ 1,820,926
1,378,000 7.750%, 02/01/21 1,460,680
919,000 6.500%, 05/15/19* 921,298
Oasis Petroleum, Inc.
3,849,000 6.500%, 11/01/21 3,897,112
1,148,000 6.875%, 01/15/23µ 1,165,220
4,594,000 Parker Drilling Company* 9.125%, 04/01/18 4,950,035
2,756,000 Pioneer Drilling Companyµ 9.875%, 03/15/18 2,976,480
Plains Exploration & Production Company
5,512,000 6.750%, 02/01/22 5,925,400
2,297,000 6.125%, 06/15/19 2,388,880
5,053,000 Samson Investment Companyµ* 9.750%, 02/15/20 5,248,804
4,594,000 SEACOR Holdings, Inc.µ 7.375%, 10/01/19 5,051,957
SESI, LLC
5,972,000 6.875%, 06/01/14µ 5,973,941
2,297,000 7.125%, 12/15/21* 2,555,413
SM Energy Company
3,506,000 6.625%, 02/15/19 3,646,240
1,654,000 6.500%, 11/15/21 1,720,160
3,124,000 Swift Energy Companyµ 8.875%, 01/15/20 3,358,300
3,307,000 Trinidad Drilling, Ltd.µ* 7.875%, 01/15/19 3,546,757
5,972,000 W&T Offshore, Inc.µ 8.500%, 06/15/19 6,300,460
1,360,000 Whiting Petroleum Corp.µ 6.500%, 10/01/18 1,465,400
148,248,185
Financials (3.9%)
2,206,000 AON Corp.µ 8.205%, 01/01/27 2,610,088
1,525,000 Chesapeake Oilfield Finance, Inc.* 6.625%, 11/15/19 1,395,375
3,487,000 Legg Mason, Inc.µ* 5.500%, 05/21/19 3,709,652
7,120,000 Leucadia National Corp.µ 8.125%, 09/15/15 8,036,700
5,053,000 Neuberger Berman Group LLCµ* 5.875%, 03/15/22 5,368,813
4,134,000 Nuveen Investments, Inc.µ 10.500%, 11/15/15 4,216,680
Omega Healthcare Investors, Inc.
3,216,000 6.750%, 10/15/22 3,569,760
2,894,000 7.500%, 02/15/20µ 3,255,750
32,162,818
Health Care (10.1%)
169,000 AMERIGROUP Corp. 7.500%, 11/15/19 198,998
1,837,000 Bio-Rad Laboratories, Inc.µ 8.000%, 09/15/16 2,020,700
6,941,000 Community Health Systems, Inc. 7.125%, 07/15/20 7,279,374
5,455,000 DaVita, Inc.µ 6.625%, 11/01/20 5,809,575
Endo Pharmaceuticals Holdings, Inc.
6,890,000 7.000%, 12/15/20 7,656,512
919,000 7.000%, 07/15/19µ 1,020,090
PRINCIPAL AMOUNT VALUE
Fresenius Medµ*
2,756,000 6.500%, 09/15/18 $ 3,090,165
919,000 5.875%, 01/31/22 984,479
9,647,000 Grifols, SA 8.250%, 02/01/18 10,611,700
2,756,000 HCA Holdings, Inc.µ 7.750%, 05/15/21 3,014,375
3,859,000 Health Management Associates, Inc.µ* 7.375%, 01/15/20 4,182,191
5,287,000 Hologic, Inc.*† 6.250%, 08/01/20 5,604,220
Mylan, Inc.µ*
3,969,000 7.625%, 07/15/17 4,447,761
2,986,000 7.875%, 07/15/20 3,411,505
5,053,000 Teleflex, Inc.µ 6.875%, 06/01/19 5,394,077
Valeant Pharmaceuticals International, Inc.*
5,696,000 7.000%, 10/01/20µ 5,909,600
3,216,000 7.250%, 07/15/22 3,336,600
965,000 6.750%, 10/01/17µ 1,032,550
8,143,000 Warner Chilcott Company, LLCµ 7.750%, 09/15/18 8,845,334
83,849,806
Industrials (10.0%)
3,714,000 Abengoa, SAµ* 8.875%, 11/01/17 3,156,900
Belden, Inc.
3,675,000 9.250%, 06/15/19 4,060,875
2,986,000 7.000%, 03/15/17 3,109,172
4,019,000 Boart Longyear Management Pty., Ltd.µ* 7.000%, 04/01/21 4,209,902
983,000 Clean Harbors, Inc.* 5.250%, 08/01/20 1,018,634
Deluxe Corp.
5,053,000 7.000%, 03/15/19~ 5,343,547
4,267,000 7.375%, 06/01/15µ 4,357,674
3,804,000 Dycom Investments, Inc.µ 7.125%, 01/15/21 4,155,870
1,249,000 Esterline Technologies Corp.µ 7.000%, 08/01/20 1,386,390
1,470,000 H&E Equipment Services, Inc.µ 8.375%, 07/15/16 1,519,613
3,216,000 Manitowoc Company, Inc.µ 8.500%, 11/01/20 3,521,520
4,318,000 Monaco SpinCo, Inc.* 6.750%, 04/30/20 4,663,440
8,039,000 Rexel, SAµ* 6.125%, 12/15/19 8,250,024
4,594,000 Sensata Technologies Holding, B.V.µ* 6.500%, 05/15/19 4,812,215
7,120,000 Spirit AeroSystems Holdings, Inc.µ 7.500%, 10/01/17 7,760,800
Terex Corp.
4,594,000 8.000%, 11/15/17µ 4,858,155
404,000 6.500%, 04/01/20 419,150
1,282,000 TransDigm Group, Inc. 7.750%, 12/15/18 1,435,840
Triumph Group, Inc.
5,788,000 8.625%, 07/15/18µ 6,482,560
230,000 8.000%, 11/15/17 252,425

See accompanying Notes to Schedule of Investments

Calamos Convertible Opportunities and Income Fund

SCHEDULE OF INVESTMENTS JULY 31, 2012 (UNAUDITED)

PRINCIPAL AMOUNT VALUE
5,053,000 UR Financing Escrow Corp.* 7.625%, 04/15/22 $ 5,387,761
3,193,000 WESCO Distribution, Inc.µ 7.500%, 10/15/17 3,272,825
83,435,292
Information Technology (8.2%)
Amkor Technology, Inc.µ
4,134,000 7.375%, 05/01/18 4,289,025
863,000 6.625%, 06/01/21 860,843
1,286,000 Anixter International, Inc.µ 5.950%, 03/01/15 1,347,085
7,249,000 Audatex North America, Inc.µ* 6.750%, 06/15/18 7,774,552
Equinix, Inc.µ
4,134,000 7.000%, 07/15/21 4,614,578
2,848,000 8.125%, 03/01/18 3,168,400
2,756,000 Fidelity National Information Services, Inc.µ 7.875%, 07/15/20 3,121,170
5,972,000 Hughes Satellite Systems Corp. 7.625%, 06/15/21 6,628,920
7,350,000 iGATE Corp. 9.000%, 05/01/16 7,827,750
3,675,000 J2 Global, Inc.* 8.000%, 08/01/20 3,716,344
5,944,000 Sanmina-SCI Corp.µ* 7.000%, 05/15/19 5,944,000
Seagate Technology
4,364,000 6.875%, 05/01/20 4,729,485
3,445,000 7.000%, 11/01/21 3,759,356
1,608,000 7.750%, 12/15/18 1,788,900
2,986,000 ViaSat, Inc.µ 8.875%, 09/15/16 3,209,950
5,053,000 Viasystems, Inc.* 7.875%, 05/01/19 4,989,837
67,770,195
Materials (5.2%)
2,104,000 Allegheny Ludlum Corp.µ 6.950%, 12/15/25 2,522,967
2,527,000 AngloGold Holdings, PLC 5.125%, 08/01/22 2,601,491
4,471,000 Clearwater Paper Corp.µ 7.125%, 11/01/18 4,828,680
FMG Resources*
9,187,000 8.250%, 11/01/19 9,715,252
919,000 6.875%, 04/01/22µ 920,149
5,889,000 Greif, Inc.µ 7.750%, 08/01/19 6,742,905
3,675,000 New Gold, Inc.* 7.000%, 04/15/20 3,849,562
3,261,000 Sealed Air Corp.* 8.125%, 09/15/19 3,676,778
Steel Dynamics, Inc.
7,387,000 7.750%, 04/15/16µ 7,710,181
919,000 7.625%, 03/15/20 994,818
43,562,783
Telecommunication Services (0.7%)
5,512,000 Qwest Communications International, Inc.µ 7.750%, 02/15/31 5,716,539
PRINCIPAL AMOUNT VALUE
Utilities (2.3%)
2,756,000 AES Corp.* 7.375%, 07/01/21 $ 3,165,955
7,580,000 AmeriGas Finance Corp.µ 7.000%, 05/20/22 8,072,700
Calpine Corp.µ*
3,445,000 7.875%, 07/31/20 3,901,463
2,986,000 7.875%, 01/15/23 3,411,505
496,000 7.500%, 02/15/21 554,280
19,105,903
TOTAL CORPORATE BONDS (Cost $608,207,820) 640,323,963
CONVERTIBLE BONDS (28.0%)
Consumer Discretionary (5.8%)
7,500,000 International Game Technologyµ 3.250%, 05/01/14 7,893,750
15,750,000 Liberty Media Corp. (Time Warner, Inc.)µ§ 3.125%, 03/30/23 19,667,812
15,870,000 Liberty Media Corp. (Viacom, CBS Corp. - Class B)µ§ 3.250%, 03/15/31 14,025,113
6,027,000 Priceline.com, Inc.µ* 1.000%, 03/15/18 6,463,958
48,050,633
Energy (0.8%)
8,500,000 Chesapeake Energy Corp.µ 2.250%, 12/15/38 6,810,625
Financials (1.1%)
3,000,000 Affiliated Managers Group, Inc.µ 3.950%, 08/15/38 3,255,000
2,241,000 Fidelity National Financial, Inc. 4.250%, 08/15/18 2,529,529
2,850,000 Health Care REIT, Inc.µ 3.000%, 12/01/29 3,526,875
9,311,404
Health Care (6.5%)
8,750,000 Gilead Sciences, Inc.µ 1.625%, 05/01/16 11,965,625
9,250,000 LifePoint Hospitals, Inc.µ 3.500%, 05/15/14 9,781,875
4,250,000 Salix Pharmaceuticals, Ltd.µ* 1.500%, 03/15/19 4,319,062
15,000,000 Shire, PLC 2.750%, 05/09/14 17,066,277
9,000,000 Teleflex, Inc.µ 3.875%, 08/01/17 10,845,000
53,977,839
Industrials (1.3%)
10,500,000 Trinity Industries, Inc.µ 3.875%, 06/01/36 10,696,875
Information Technology (9.6%)
Intel Corp.
22,280,000 2.950%, 12/15/35µ 25,399,200
2,244,000 3.250%, 08/01/39 2,976,105
2,750,000 Ixiaµ 3.000%, 12/15/15 3,190,000

See accompanying Notes to Schedule of Investments

Calamos Convertible Opportunities and Income Fund

SCHEDULE OF INVESTMENTS JULY 31, 2012 (UNAUDITED)

PRINCIPAL AMOUNT VALUE
Lam Research Corp.
4,851,000 1.250%, 05/15/18µ $ 4,747,916
3,000,000 0.500%, 05/15/16 2,906,250
17,800,000 Linear Technology Corp.µ 3.000%, 05/01/27 18,690,000
14,250,000 Mentor Graphics Corp.µ 4.000%,
04/01/31 15,710,625
5,500,000 Nuance Communications, Inc.µ* 2.750%, 11/01/31 5,809,375
79,429,471
Materials (2.9%)
11,100,000 AngloGold Ashanti, Ltd.µ 3.500%, 05/22/14 11,918,625
3,750,000 Newmont Mining Corp.µ 1.625%,
07/15/17 4,767,187
5,000,000 Royal Gold, Inc.µ 2.875%,
06/15/19 5,193,750
1,701,000 Steel Dynamics, Inc.µ~ 5.125%,
06/15/14 1,841,333
23,720,895
TOTAL CONVERTIBLE BONDS (Cost $227,148,432) 231,997,742
U.S. GOVERNMENT AND AGENCY SECURITIES (0.6%)
United States Treasury Note~
4,134,000 1.375%, 02/15/13 4,161,615
919,000 0.375%, 09/30/12 919,503
TOTAL U.S. GOVERNMENT AND
AGENCY SECURITIES (Cost $5,079,457) 5,081,118
SOVEREIGN BONDS (1.4%)
Federative Republic of Brazil
1,709,600 BRL 10.000%, 01/01/14 8,638,244
551,000 BRL 10.000%, 01/01/13 2,739,611
TOTAL SOVEREIGN BONDS (Cost $12,534,866) 11,377,855
SYNTHETIC CONVERTIBLE SECURITIES (8.2%)
Corporate Bonds (6.8%)
Consumer Discretionary (1.4%)
317,000 American Axle & Manufacturing, Inc.µ 7.875%, 03/01/17 329,680
284,000 Asbury Automotive Group, Inc.µ 7.625%, 03/15/17 293,940
274,000 Cedar Fair, LPµ 9.125%,
08/01/18 309,791
497,000 Cooper Tire & Rubber Companyµ 8.000%, 12/15/19 534,896
437,000 Dana Holding Corp.µ 6.750%,
02/15/21 472,506
DISH Network Corp.
512,000 7.875%, 09/01/19µ 597,760
236,000 5.875%, 07/15/22* 244,260
213,000 7.125%, 02/01/16 236,164
406,000 Express, LLCµ 8.750%,
03/01/18 440,002
PRINCIPAL AMOUNT VALUE
447,000 Gap, Inc.µ 5.950%,
04/12/21 $ 473,338
Goodyear Tire & Rubber Companyµ
569,000 8.250%, 08/15/20 623,055
81,000 7.000%, 05/15/22 83,126
193,000 Hasbro, Inc.µ 6.600%,
07/15/28 219,132
Icahn Enterprises, LP
340,000 8.000%, 01/15/18 362,950
114,000 8.000%, 01/15/18µ* 121,695
92,000 Interpublic Group of Companies, Inc.µ 10.000%, 07/15/17 103,960
J.C. Penney Company, Inc.µ
253,000 6.375%, 10/15/36 183,741
233,000 7.125%, 11/15/23 205,914
Jaguar Land Rover, PLC*
406,000 8.125%, 05/15/21µ 433,405
191,000 7.750%, 05/15/18 204,370
476,000 Jarden Corp.µ 7.500%,
05/01/17 540,260
366,000 Lear Corp.µ 8.125%,
03/15/20 414,037
244,000 Liberty Media Corp.µ 8.250%,
02/01/30 253,760
Limited Brands, Inc.
244,000 7.600%, 07/15/37µ 244,915
98,000 5.625%, 02/15/22µ 103,145
64,000 6.950%, 03/01/33 62,960
Meritage Homes Corp.
206,000 7.000%, 04/01/22* 215,270
81,000 7.150%, 04/15/20 85,860
294,000 Phillips-Van Heusen Corp.µ 7.375%, 05/15/20 328,913
406,000 Royal Caribbean Cruises, Ltd.µ 7.500%, 10/15/27 413,613
356,000 Ryland Group, Inc. 6.625%,
05/01/20 372,910
Sally Holdings, LLC
128,000 5.750%, 06/01/22 137,440
81,000 6.875%, 11/15/19 90,821
Service Corp. International
569,000 7.500%, 04/01/27µ 597,450
81,000 7.625%, 10/01/18µ 94,365
81,000 7.000%, 05/15/19 88,493
81,000 Toll Brothers Finance Corp. 5.875%,
02/15/22 86,644
364,000 Vail Resorts, Inc. 6.500%,
05/01/19 394,030
352,000 Wynn Las Vegas, LLCµ 7.750%,
08/15/20 392,480
11,391,051
Consumer Staples (0.3%)
372,000 Darling International, Inc.µ 8.500%, 12/15/18 419,430
203,000 Dean Foods Companyµ 9.750%,
12/15/18 223,300
295,000 Elizabeth Arden, Inc.µ 7.375%,
03/15/21 325,975
404,000 JBS USA, LLCµ* 7.250%,
06/01/21 385,820
612,000 Post Holdings, Inc.µ* 7.375%,
02/15/22 641,070

See accompanying Notes to Schedule of Investments

Calamos Convertible Opportunities and Income Fund

SCHEDULE OF INVESTMENTS JULY 31, 2012 (UNAUDITED)

PRINCIPAL AMOUNT — 406,000 Smithfield Foods, Inc.µ 7.750%, 07/01/17 VALUE — $ 452,690
2,448,285
Energy (1.6%)
1,951,000 NOK Aker Solutions, ASA‡ 6.660%, 06/06/17 323,680
196,000 Atwood Oceanics, Inc.µ 6.500%, 02/01/20 209,720
406,000 Berry Petroleum Companyµ 6.375%, 09/15/22 431,375
748,000 Bristow Group, Inc.µ 7.500%, 09/15/17 777,920
447,000 Calfrac Holdings, LPµ* 7.500%, 12/01/20 429,120
Calumet Specialty Products, LP
325,000 9.375%, 05/01/19µ 338,000
122,000 9.625%, 08/01/20* 129,320
650,000 Carrizo Oil & Gas, Inc.µ 8.625%, 10/15/18 706,875
488,000 Cimarex Energy Company 5.875%, 05/01/22 520,940
488,000 Clayton Williams Energy, Inc.µ 7.750%, 04/01/19 485,560
Frontier Oil Corp.
494,000 8.500%, 09/15/16µ 519,935
66,000 6.875%, 11/15/18 70,290
447,000 GulfMark Offshore, Inc.µ* 6.375%, 03/15/22 458,175
311,000 Helix Energy Solutions Group, Inc.* 9.500%, 01/15/16 326,161
244,000 Holly Energy Partners, LP* 6.500%, 03/01/20 255,590
165,000 HollyFrontier Corp.µ 9.875%, 06/15/17 183,563
Hornbeck Offshore Services, Inc.µ
238,000 8.000%, 09/01/17 255,850
81,000 5.875%, 04/01/20* 81,405
447,000 Laredo Petroleum, Inc.* 7.375%, 05/01/22 473,820
Linn Energy, LLC
406,000 8.625%, 04/15/20µ 442,540
163,000 6.250%, 11/01/19µ* 161,574
122,000 7.750%, 02/01/21 129,320
81,000 6.500%, 05/15/19* 81,203
Oasis Petroleum, Inc.
341,000 6.500%, 11/01/21 345,262
102,000 6.875%, 01/15/23µ 103,530
406,000 Parker Drilling Company* 9.125%, 04/01/18 437,465
244,000 Pioneer Drilling Companyµ 9.875%, 03/15/18 263,520
Plains Exploration & Production Company
488,000 6.750%, 02/01/22 524,600
203,000 6.125%, 06/15/19 211,120
447,000 Samson Investment Companyµ* 9.750%, 02/15/20 464,321
406,000 SEACOR Holdings, Inc.µ 7.375%, 10/01/19 446,473
SESI, LLC
528,000 6.875%, 06/01/14µ 528,172
203,000 7.125%, 12/15/21* 225,837
PRINCIPAL AMOUNT VALUE
SM Energy Company
310,000 6.625%, 02/15/19 $ 322,400
146,000 6.500%, 11/15/21 151,840
276,000 Swift Energy Companyµ 8.875%, 01/15/20 296,700
293,000 Trinidad Drilling, Ltd.µ* 7.875%, 01/15/19 314,242
528,000 W&T Offshore, Inc.µ 8.500%, 06/15/19 557,040
120,000 Whiting Petroleum Corp.µ 6.500%, 10/01/18 129,300
13,113,758
Financials (0.3%)
195,000 AON Corp.µ 8.205%, 01/01/27 230,720
135,000 Chesapeake Oilfield Finance, Inc.* 6.625%, 11/15/19 123,525
308,000 Legg Mason, Inc.µ* 5.500%, 05/21/19 327,666
630,000 Leucadia National Corp.µ 8.125%, 09/15/15 711,112
447,000 Neuberger Berman Group LLCµ* 5.875%, 03/15/22 474,938
366,000 Nuveen Investments, Inc.µ 10.500%, 11/15/15 373,320
Omega Healthcare Investors, Inc.
284,000 6.750%, 10/15/22 315,240
256,000 7.500%, 02/15/20µ 288,000
2,844,521
Health Care (0.9%)
15,000 AMERIGROUP Corp. 7.500%, 11/15/19 17,663
163,000 Bio-Rad Laboratories, Inc.µ 8.000%, 09/15/16 179,300
614,000 Community Health Systems, Inc. 7.125%, 07/15/20 643,932
483,000 DaVita, Inc.µ 6.625%, 11/01/20 514,395
Endo Pharmaceuticals Holdings, Inc.
610,000 7.000%, 12/15/20 677,862
81,000 7.000%, 07/15/19µ 89,910
Fresenius Medµ*
244,000 6.500%, 09/15/18 273,585
81,000 5.875%, 01/31/22 86,771
853,000 Grifols, SA 8.250%, 02/01/18 938,300
244,000 HCA Holdings, Inc.µ 7.750%, 05/15/21 266,875
341,000 Health Management Associates, Inc.µ* 7.375%, 01/15/20 369,559
468,000 Hologic, Inc.*† 6.250%,
08/01/20 496,080
Mylan, Inc.µ*
351,000 7.625%, 07/15/17 393,339
264,000 7.875%, 07/15/20 301,620
447,000 Teleflex, Inc.µ 6.875%, 06/01/19 477,173
Valeant Pharmaceuticals International, Inc.*
504,000 7.000%, 10/01/20µ 522,900
284,000 7.250%, 07/15/22 294,650

See accompanying Notes to Schedule of Investments

Calamos Convertible Opportunities and Income Fund

SCHEDULE OF INVESTMENTS JULY 31, 2012 (UNAUDITED)

PRINCIPAL AMOUNT VALUE
85,000 6.750%, 10/01/17µ $ 90,950
720,000 Warner Chilcott Company, LLCµ 7.750%, 09/15/18 782,100
7,416,964
Industrials (0.9%)
329,000 Abengoa, SAµ* 8.875%, 11/01/17 279,650
Belden, Inc.
325,000 9.250%, 06/15/19 359,125
264,000 7.000%, 03/15/17 274,890
356,000 Boart Longyear Management Pty., Ltd.µ* 7.000%, 04/01/21 372,910
87,000 Clean Harbors, Inc.* 5.250%, 08/01/20 90,154
Deluxe Corp.
447,000 7.000%, 03/15/19~ 472,702
378,000 7.375%, 06/01/15µ 386,032
336,000 Dycom Investments, Inc.µ 7.125%, 01/15/21 367,080
111,000 Esterline Technologies Corp.µ 7.000%, 08/01/20 123,210
130,000 H&E Equipment Services, Inc.µ 8.375%, 07/15/16 134,388
284,000 Manitowoc Company, Inc.µ 8.500%, 11/01/20 310,980
382,000 Monaco SpinCo, Inc.* 6.750%, 04/30/20 412,560
711,000 Rexel, SAµ* 6.125%, 12/15/19 729,664
406,000 Sensata Technologies Holding, B.V.µ* 6.500%, 05/15/19 425,285
630,000 Spirit AeroSystems Holdings, Inc.µ 7.500%, 10/01/17 686,700
Terex Corp.
406,000 8.000%, 11/15/17µ 429,345
36,000 6.500%, 04/01/20 37,350
113,000 TransDigm Group, Inc. 7.750%, 12/15/18 126,560
Triumph Group, Inc.
512,000 8.625%, 07/15/18µ 573,440
20,000 8.000%, 11/15/17 21,950
447,000 UR Financing Escrow Corp.* 7.625%, 04/15/22 476,614
282,000 WESCO Distribution, Inc.µ 7.500%, 10/15/17 289,050
7,379,639
Information Technology (0.7%)
Amkor Technology, Inc.µ
366,000 7.375%, 05/01/18 379,725
76,000 6.625%, 06/01/21 75,810
114,000 Anixter International, Inc.µ 5.950%, 03/01/15 119,415
641,000 Audatex North America, Inc.µ* 6.750%, 06/15/18 687,472
Equinix, Inc.µ
366,000 7.000%, 07/15/21 408,548
252,000 8.125%, 03/01/18 280,350
244,000 Fidelity National Information Services, Inc.µ 7.875%, 07/15/20 276,330
PRINCIPAL AMOUNT VALUE
528,000 Hughes Satellite Systems Corp. 7.625%, 06/15/21 $ 586,080
650,000 iGATE Corp. 9.000%, 05/01/16 692,250
325,000 J2 Global, Inc.* 8.000%, 08/01/20 328,656
526,000 Sanmina-SCI Corp.µ* 7.000%, 05/15/19 526,000
Seagate Technology
386,000 6.875%, 05/01/20 418,328
305,000 7.000%, 11/01/21 332,831
142,000 7.750%, 12/15/18 157,975
264,000 ViaSat, Inc.µ 8.875%, 09/15/16 283,800
447,000 Viasystems, Inc.* 7.875%, 05/01/19 441,412
5,994,982
Materials (0.4%)
186,000 Allegheny Ludlum Corp.µ 6.950%, 12/15/25 223,038
223,000 AngloGold Holdings, PLC 5.125%, 08/01/22 229,574
396,000 Clearwater Paper Corp.µ 7.125%, 11/01/18 427,680
FMG Resources*
813,000 8.250%, 11/01/19 859,747
81,000 6.875%, 04/01/22µ 81,101
521,000 Greif, Inc.µ 7.750%, 08/01/19 596,545
325,000 New Gold, Inc.* 7.000%, 04/15/20 340,437
289,000 Sealed Air Corp.* 8.125%, 09/15/19 325,848
Steel Dynamics, Inc.
653,000 7.750%, 04/15/16µ 681,569
81,000 7.625%, 03/15/20 87,683
3,853,222
Telecommunication Services (0.1%)
488,000 Qwest Communications International, Inc.µ 7.750%, 02/15/31 506,109
Utilities (0.2%)
244,000 AES Corp.* 7.375%, 07/01/21 280,295
670,000 AmeriGas Finance Corp.µ 7.000%, 05/20/22 713,550
Calpine Corp.µ*
305,000 7.875%, 07/31/20 345,413
264,000 7.875%, 01/15/23 301,620
44,000 7.500%, 02/15/21 49,170
1,690,048
TOTAL CORPORATE BONDS 56,638,579
U.S. Government and Agency Securities (0.1%)
United States Treasury Note~
366,000 1.375%, 02/15/13 368,445
81,000 0.375%, 09/30/12 81,044
TOTAL U.S. GOVERNMENT AND AGENCY SECURITIES 449,489

See accompanying Notes to Schedule of Investments

Calamos Convertible Opportunities and Income Fund

SCHEDULE OF INVESTMENTS JULY 31, 2012 (UNAUDITED)

PRINCIPAL AMOUNT VALUE
Sovereign Bonds (0.1%)
Federative Republic of Brazil
151,000 BRL 10.000%, 01/01/14 $ 762,971
49,000 BRL 10.000%, 01/01/13 243,631
TOTAL SOVEREIGN BONDS 1,006,602
NUMBER OF CONTRACTS VALUE
Purchased Options (1.2%)#
Consumer Discretionary (0.1%)
140 Priceline.com, Inc. Call, 01/19/13, Strike $630.00 1,185,100
Information Technology (1.1%)
270 Apple, Inc. Call, 01/18/14, Strike
$600.00 2,704,725
2,225 eBay, Inc. Call, 01/18/14, Strike
$40.00 2,263,937
2,650 EMC Corp. Call, 01/19/13, Strike
$25.00 756,575
1,900 QUALCOMM, Inc. Call, 01/19/13, Strike $55.00 1,339,500
3,250 EUR SAP, AG Call, 06/21/13, Strike
53.59 1,531,036
390 VMware, Inc. Class A Call, 01/18/14, Strike $110.00 471,900
9,067,673
TOTAL PURCHASED OPTIONS 10,252,773
TOTAL SYNTHETIC CONVERTIBLE SECURITIES (Cost $66,558,713) 68,347,443
NUMBER OF SHARES VALUE
CONVERTIBLE PREFERRED STOCKS (12.8%)
Consumer Staples (0.9%)
76,000 Bunge, Ltd.µ 4.875% 7,362,500
Energy (3.6%)
280,000 Apache Corp.µ 6.000% 13,599,600
Chesapeake Energy Corp.*
16,431 5.750% 14,459,280
2,000 5.750% 1,775,500
29,834,380
Financials (4.0%)
350,000 Affiliated Managers Group, Inc.µ 5.150% 15,618,750
64,000 MetLife, Inc.µ 5.000% 4,012,160
11,600 Wells Fargo & Companyµ 7.500% 13,421,200
33,052,110
Industrials (1.6%)
38,966 Stanley Black & Decker, Inc.µ 4.750% 4,608,899
160,000 United Technologies Corp.µ 7.500% 8,440,000
13,048,899
Materials (0.8%)
175,000 AngloGold Ashanti, Ltd. 6.000% 7,173,250
NUMBER OF SHARES VALUE
Utilities (1.9%)
300,000 NextEra Energy, Inc. 5.599% $ 15,570,000
TOTAL CONVERTIBLE PREFERRED STOCKS (Cost $106,032,700) 106,041,139
COMMON STOCKS (1.1%)
Financials (0.1%)
13,850 American International Group, Inc.µ# 433,090
Health Care (1.0%)
189,765 Merck & Company, Inc.µ 8,381,920
TOTAL COMMON STOCKS (Cost $7,733,105) 8,815,010
SHORT TERM INVESTMENT (3.9%)
32,352,844 Fidelity Prime Money Market Fund - Institutional Class (Cost $32,352,844) 32,352,844
TOTAL INVESTMENTS (133.1%) (Cost $1,065,647,937) 1,104,337,114
LIABILITIES, LESS OTHER ASSETS (-33.1%) (274,330,898 )
NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS (100.0%) $ 830,006,216

NOTES TO SCHEDULE OF INVESTMENTS

| µ | Security, or portion of security, is held in a segregated account as collateral for note payable aggregating a total value of $752,244,454. $274,227,966 of the collateral has been
re-registered by the counterparty. |
| --- | --- |
| * | Securities issued and sold pursuant to a Rule 144A transaction are excepted from the registration requirement of the Securities Act of 1933, as amended. These securities may only be
sold to qualified institutional buyers (“QIBs”), such as the fund. Any resale of these securities must generally be effected through a sale that is registered under the Act or otherwise exempted from such registration requirements. At
July 31, 2012, the value of 144A securities that could not be exchanged to the registered form is $159,561,988 or 19.2% of net assets applicable to common shareholders. |
| ‡ | Variable rate or step bond security. The rate shown is the rate in effect at July 31, 2012. |
| † | Security or a portion of the security purchased on a delayed delivery or when-issued basis. |
| ~ | Security, or portion of security, is segregated as collateral (or potential collateral for future transactions) for written options and swaps. The aggregate value of such securities
is $5,128,573. |
| § | Securities exchangeable or convertible into securities of one or more entities that are different than the issuer. Each entity is identified in the parenthetical. |
| # | Non-income producing security. |

FOREIGN CURRENCY ABBREVIATIONS

BRL Brazilian Real
EUR European Monetary Unit
NOK Norwegian Krone

Note: Value for securities denominated in foreign currencies is shown in U.S. dollars. The principal amount for such securities is shown in the respective foreign currency. The date on options represents the expiration date of the option contract. The option contract may be exercised at any date on or before the date shown.

See accompanying Notes to Schedule of Investments

Calamos Convertible Opportunities and Income Fund

INTEREST RATE SWAPS

| COUNTERPARTY | FIXED RATE (FUND
PAYS) | FLOATING
RATE (FUND RECEIVES) | TERMINATION DATE | NOTIONAL AMOUNT | UNREALIZED APPRECIATION/ (DEPRECIATION) | |
| --- | --- | --- | --- | --- | --- | --- |
| BNP Paribas, SA | 2.4300% quarterly | 3 month Libor | 04/14/14 | $ 80,000,000 | $ (2,862,939 | ) |
| BNP Paribas, SA | 1.1600% quarterly | 3 month Libor | 04/19/17 | 55,000,000 | (1,141,021 | ) |
| BNP Paribas, SA | 1.1400 % quarterly | 3 month Libor | 03/14/17 | 40,000,000 | (837,104 | ) |
| BNP Paribas, SA | 1.8525% quarterly | 3 month Libor | 09/14/12 | 38,700,000 | (138,345 | ) |
| | | | | | $ (4,979,409 | ) |

See accompanying Notes to Schedule of Investments

NOTE 1 — ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (UNAUDITED)

Organization. Calamos Convertible Opportunities and Income Fund (the “Fund”) was organized as a Delaware statutory trust on April 17, 2002 and is registered under the Investment Company Act of 1940 (the “1940 Act”) as a diversified, closed-end management investment company. The Fund commenced operations on June 26, 2002. The Fund’s investment objective is to provide total return through a combination of capital appreciation and current income. Under normal circumstances, the Fund will invest at least 80% of its managed assets in a diversified portfolio of convertibles and non-convertible income securities. “Managed assets” means the Fund’s total assets (including any assets attributable to any leverage that may be outstanding) minus total liabilities (other than debt representing financial leverage).

Fund Valuation. The valuation of the Fund’s investments is in accordance with policies and procedures adopted by and under the ultimate supervision of the board of trustees.

Fund securities that are traded on U.S. securities exchanges, except option securities, are valued at the last current reported sales price at the time a Fund determines its net asset value (“NAV”). Securities traded in the over-the-counter market and quoted on The NASDAQ Stock Market are valued at the NASDAQ Official Closing Price, as determined by NASDAQ, or lacking a NASDAQ Official Closing Price, the last current reported sale price on NASDAQ at the time the Fund determines its NAV.

When a last sale or closing price is not available, equity securities, other than option securities, that are traded on a U.S. securities exchange and other equity securities traded in the over-the-counter market are valued at the mean between the most recent bid and asked quotations in accordance with guidelines adopted by the board of trustees. Each option security traded on a U.S. securities exchange is valued at the mid-point of the consolidated bid/ask quote for the option security, also in accordance with guidelines adopted by the board of trustees. Each over-the-counter option that is not traded through the Options Clearing Corporation is valued based on a quotation provided by the counterparty to such option under the ultimate supervision of the board of trustees.

Fixed income securities, certain convertible preferred securities, and non-exchange traded derivatives are normally valued by independent pricing services or by dealers or brokers who make markets in such securities. Valuations of such fixed income securities, certain convertible preferred securities, and non-exchange traded derivatives consider yield or price of equivalent securities of comparable quality, coupon rate, maturity, type of issue, trading characteristics and other market data and do not rely exclusively upon exchange or over-the-counter prices.

Trading on European and Far Eastern exchanges and over-the-counter markets is typically completed at various times before the close of business on each day on which the New York Stock Exchange (“NYSE”) is open. Each security trading on these exchanges or over-the-counter markets may be valued utilizing a systematic fair valuation model provided by an independent pricing service approved by the board of trustees. The valuation of each security that meets certain criteria in relation to the valuation model is systematically adjusted to reflect the impact of movement in the U.S. market after the foreign markets close. Securities that do not meet the criteria, or that are principally traded in other foreign markets, are valued as of the last reported sale price at the time the Fund determines its NAV, or when reliable market prices or quotations are not readily available, at the mean between the most recent bid and asked quotations as of the close of the appropriate exchange or other designated time. Trading of foreign securities may not take place on every NYSE business day. In addition, trading may take place in various foreign markets on Saturdays or on other days when the NYSE is not open and on which the Fund’s NAV is not calculated.

If the pricing committee determines that the valuation of a security in accordance with the methods described above is not reflective of a fair value for such security, the security is valued at a fair value by the pricing committee, under the ultimate supervision of the board of trustees, following the guidelines and/or procedures adopted by the board of trustees.

The Fund also may use fair value pricing, pursuant to guidelines adopted by the board of trustees and under the ultimate supervision of the board of trustees, if trading in the security is halted or if the value of a security it holds is materially affected by events occurring before the Fund’s pricing time but after the close of the primary market or exchange on which the security is listed. Those procedures may utilize valuations furnished by pricing services approved by the board of trustees, which may be based on market transactions for comparable securities and various relationships between securities that are generally recognized by institutional traders, a computerized matrix system, or appraisals derived from information concerning the securities or similar securities received from recognized dealers in those securities.

When fair value pricing of securities is employed, the prices of securities used by a Fund to calculate its NAV may differ from market quotations or official closing prices. In light of the judgment involved in fair valuations, there can be no assurance that a fair value assigned to a particular security is accurate.

Investment Transactions. Investment transactions are recorded on a trade date basis as of July 31, 2012.

Foreign Currency Translation. Values of investments and other assets and liabilities denominated in foreign currencies are translated into U.S. dollars using a rate quoted by a major bank or dealer in the particular currency market, as reported by a recognized quotation dissemination service.

Option Transactions. For hedging and investment purposes, the Fund may purchase or write (sell) put and call options. One of the risks associated with purchasing an option is that the Fund pays a premium whether or not the option is exercised. Additionally, the Fund bears the risk of loss of premium and change in value should the counterparty not perform under the contract. The Fund as writer of an option bears the market risk of an unfavorable change in the price of the security underlying the written option.

Forward Foreign Currency Contracts. The Fund may engage in portfolio hedging with respect to changes in currency exchange rates by entering into forward foreign currency contracts to purchase or sell currencies. A forward foreign currency contract is a commitment to purchase or sell a foreign currency at a future date at a negotiated forward rate. Risks associated with such contracts include, among other things, movement in the value of the foreign currency relative to the U.S. dollar and the ability of the counterparty to perform. The net unrealized gain, if any, represents the credit risk to the Fund on a forward foreign currency contract. The contracts are valued daily at forward foreign exchange rates. There were no open forward foreign currency contracts at July 31, 2012.

NOTE 2 — INVESTMENTS

The following information is presented on a federal income tax basis as of July 31, 2012. Differences between the cost basis under U.S. generally accepted accounting principles and federal income tax purposes are primarily due to temporary differences.

The cost basis of investments for federal income tax purposes at July 31, 2012 was as follows:

Cost basis of investments $
Gross unrealized appreciation 50,543,013
Gross unrealized depreciation (42,449,646 )
Net unrealized appreciation (depreciation) $ 8,093,367

NOTE 3 — BORROWINGS

The Fund, with the approval of its board of trustees, including its independent trustees, has entered into a financing package that includes a Committed Facility Agreement (the “Agreement”) with BNP Paribas Prime Brokerage, Inc. (“BNP”) that allows the Fund to borrow up to $300,000,000, and a Lending Agreement, as defined below. Borrowings under the Agreement are secured by assets of the Fund that are held with the Fund’s custodian in a separate account (the “pledged collateral”). Interest is charged at the quarterly LIBOR (London Inter-bank Offered Rate) plus .65% on the amount borrowed and .55% on the undrawn balance. For the period ended July 31, 2012, the average borrowings under the Agreement and the average interest rate on the amount borrowed were $285,000,000 and 1.16%, respectively. As of July 31, 2012, the amount of such outstanding borrowings was $285,000,000. The interest rate applicable to the borrowings on July 31, 2012 was 1.09%.

The Lending Agreement is a separate side-agreement between the Fund and BNP pursuant to which BNP may borrow a portion of the pledged collateral (the “Lent Securities”) in an amount not to exceed the outstanding borrowings owed by the Fund to BNP under the Agreement. The Lending Agreement is intended to permit the Fund to significantly reduce the cost of its borrowings under the Agreement. BNP may re-register the Lent Securities in its own name or in another name other than the Fund, and may pledge, re-pledge, sell, lend or otherwise transfer or use the Lent Securities with all attendant rights of ownership. (It is the Fund’s understanding that BNP will perform due diligence to determine the creditworthiness of any party that borrows Lent Securities from BNP.) The Fund may designate any security within the pledged collateral as ineligible to be a Lent Security, provided there are eligible securities within the pledged collateral in an amount equal to the outstanding borrowing owed by the Fund. During the period in which the Lent Securities are outstanding, BNP must remit payment to the Fund equal to the amount of all dividends, interest or other distributions earned or made by the Lent Securities.

Under the terms of the Lending Agreement, the Lent Securities are marked to market daily, and if the value of the Lent Securities exceeds the value of the then-outstanding borrowings owed by the Fund to BNP under the Agreement (the “Current Borrowings”), BNP must, on that day, either (1) return Lent Securities to the Fund’s custodian in an amount sufficient to cause the value of the outstanding Lent Securities to equal the Current Borrowings; or (2) post cash collateral with the Fund’s custodian equal to the difference between the value of the Lent Securities and the value of the Current Borrowings. If BNP fails to perform either of these actions as required, the Fund will recall securities, as discussed below, in an amount sufficient to cause the value of the outstanding Lent Securities to equal the Current Borrowings. The Fund can recall any of the Lent Securities and BNP shall, to the extent commercially possible, return such security or equivalent security to the Fund’s custodian no later than three business days after such request. If the Fund recalls a Lent Security pursuant to the Lending Agreement, and BNP fails to return the Lent Securities or equivalent securities in a timely fashion, BNP shall remain liable to the Fund’s custodian for the ultimate delivery of such Lent Securities, or equivalent securities, and for any buy-in costs that the executing broker for the sales transaction may impose with respect to the failure to deliver. The Fund shall also have the right to apply and set-off an amount equal to one hundred percent (100%) of the then-current fair market value of such Lent Securities against the Current Borrowings.

NOTE 4 — INTEREST RATE SWAPS

The Fund engages in interest rate swaps primarily to hedge the interest rate risk on the Fund’s borrowings (see Note 3 — Borrowings). An interest rate swap is a contract that involves the exchange of one type of interest rate for another type of interest rate. If interest rates rise, resulting in a diminution in the value of the Fund’s portfolio, the Fund would receive payments under the swap that would offset, in whole or in part, such diminution in value; if interest rates fall, the Fund would likely lose money on the swap transaction. Swap agreements are stated at fair value. Notional principal amounts are used to express the extent of involvement in these transactions, but the amounts potentially subject to credit risk are much smaller. In connection with these contracts, securities may be identified as collateral in accordance with the terms of the respective swap contracts in the event of default or bankruptcy of the Fund.

NOTE 5 — SYNTHETIC CONVERTIBLE SECURITIES

The Fund may establish a “synthetic” convertible instrument by combining separate securities that possess the economic characteristics similar to a convertible security, i.e., fixed-income securities (“fixed-income component”), which may be a convertible or non-convertible security and the right to acquire equity securities (“convertible component”). The fixed-income component is achieved by investing in fixed income securities such as bonds, preferred stocks, and money market instruments. The convertible component is achieved by investing in warrants or purchased options to buy common stock at a certain exercise price, or options on a stock index. In establishing a synthetic instrument, the Fund may pool a basket of fixed-income securities and a basket of warrants or purchased options that produce the economic characteristics similar to a convertible security. Within each basket of fixed-income securities and warrants or options, different companies may issue the fixed-income and convertible components, which may be purchased separately and at different times.

The Fund may also purchase synthetic securities created by other parties, typically investment banks, including convertible structured notes. Convertible structured notes are fixed-income debentures linked to equity. Convertible structured notes have the attributes of a convertible security; however, the investment bank that issued the convertible note assumes the credit risk associated with the investment, rather than the issuer of the underlying common stock into which the note is convertible. Purchasing synthetic convertible securities may offer more flexibility than purchasing a convertible security.

NOTE 6 — WHEN-ISSUED AND DELAYED DELIVERY SECURITIES

The Fund may purchase securities on a when-issued or delayed-delivery basis. Although the payment and interest terms of these securities are established at the time the Fund enters into the commitment, the securities may be delivered and paid for a month or more after the date of purchase, when their value may have changed. The Fund makes such commitments only with the intention of actually acquiring the securities, but may sell the securities before the settlement date if Calamos Advisors deems it advisable for investment reasons. The Fund may utilize spot and forward foreign currency exchange transactions to reduce the risk inherent in fluctuations in the exchange rate between one currency and another when securities are purchased or sold on a when-issued or delayed-delivery basis.

At the time when the Fund enters into a binding obligation to purchase securities on a when-issued basis, liquid assets (cash, U.S. Government securities or other “high-grade” debt obligations) of the Fund having a value at least as great as the purchase price of the securities to be purchased will be segregated on the books of the Fund and held by the custodian throughout the period of the obligation. The use of this investment strategy may increase net asset value fluctuation.

NOTE 7 — FAIR VALUE MEASUREMENTS

Various inputs are used to determine the value of the Fund’s investments. These inputs are categorized into three broad levels as follows:

• Level 1 — Prices are determined using inputs from unadjusted quoted prices from active markets (including securities actively traded on a securities exchange) for identical assets.

• Level 2 — Prices are determined using significant observable market inputs other than unadjusted quoted prices, including quoted prices of similar securities, fair value adjustments to quoted foreign securities, interest rates, credit risk, prepayment speeds, and other relevant data.

• Level 3 — Prices reflect unobservable market inputs (including the Fund’s own judgments about assumptions market participants would use in determining fair value) when observable inputs are unavailable.

Debt securities are valued based upon evaluated prices received from an independent pricing service or from a dealer or broker who makes markets in such securities. Pricing services utilize various observable market data and as such, debt securities are generally categorized as Level 2. The levels are not necessarily an indication of the risk or liquidity of the Funds’ investments. Transfers between the levels for investment securities or other financial instruments are measured at the end of the reporting period.

The following is a summary of the inputs used in valuing the Fund’s holdings at fair value:

LEVEL 1 LEVEL 2 LEVEL 3 TOTAL
Assets:
Corporate Bonds $ — $ 640,323,963 $ — $ 640,323,963
Convertible Bonds 231,997,742 231,997,742
U.S. Government and Agency Securities 5,081,118 5,081,118
Sovereign Bonds 11,377,855 11,377,855
Synthetic Convertible Securities (Corporate Bonds) 56,638,579 56,638,579
Synthetic Convertible Securities (U.S. Government and Agency Securities) 449,489 449,489
Synthetic Convertible Securities (Sovereign Bonds) 1,006,602 1,006,602
Synthetic Convertible Securities (Purchased Options) 10,252,773 10,252,773
Convertible Preferred Stocks 51,255,109 54,786,030 106,041,139
Common Stocks 8,815,010 8,815,010
Short Term Investment 32,352,844 32,352,844
Total $ 102,675,736 $ 1,001,661,378 $ — $ 1,104,337,114
Liabilities:
Interest Rate Swaps $ — $ 4,979,409 $ — $ 4,979,409
Total $ — $ 4,979,409 $ — $ 4,979,409

ITEM 2. CONTROLS AND PROCEDURES.

a) The registrant’s principal executive officer and principal financial officer have evaluated the registrant’s disclosure controls and procedures within 90 days of this filing and have concluded that the registrant’s disclosure controls and procedures were effective, as of that date, in ensuring that information required to be disclosed by the registrant in this Form N-Q was recorded, processed, summarized, and reported timely.

b) There were no changes in the registrant’s internal controls over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) that occurred during the registrant’s last fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

ITEM 3. EXHIBITS.

(a) Certification of Principal Executive Officer.

(b) Certification of Principal Financial Officer.

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.

Calamos Convertible Opportunities and Income Fund
By: /s/ John P. Calamos, Sr.
Name: John P. Calamos, Sr.
Title: Principal Executive Officer
Date: September 18, 2012

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

Calamos Convertible Opportunities and Income Fund
By: /s/ John P. Calamos, Sr.
Name: John P. Calamos, Sr.
Title: Principal Executive Officer
Date: September 18, 2012
By: /s/ Nimish S. Bhatt
Name: Nimish S. Bhatt
Title: Principal Financial Officer
Date: September 18, 2012

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