X0505 N-CEN LIVE 0001171471 XXXXXXXX 811-21080 false false N-2 CALAMOS CONVERTIBLE OPPORTUNITIES & INCOME FUND 811-21080 0001171471 549300ZBRGRX6VMFJ315 2020 CALAMOS COURT NAPERVILLE 60563 US-IL US 630-245-7200 Calamos Advisors LLC 2020 Calamos Court Naperville 60563 630-245-7200 All records in its capacity as investment adviser Computershare Inc. 150 Royall Street Canton 02021 866-226-8016 All records in its capacity as transfer agent State Street Bank and Trust Company 1 Congress Street Suite 1 Boston 02114 617-786-3000 Mutual fund accounting and records related to custody of fund assets. N N N-2 Y Christopher M. Toub 001741400 N Hugh P. Armstrong N/A N Jeffrey S. Phlegar N/A N John E. Neal N/A N John P. Calamos, Sr. 000038210 Y John S. Koudounis 001878118 Y Karen L. Stuckey N/A N Lloyd A. Wennlund 001512907 N Virginia G. Breen N/A N William R. Rybak N/A N Walter Kelly 004729454 215 N. Peoria Chicago 60607 XXXXXX Y N N N N N Deloitte & Touche LLP 34 254900WYZPGQGKV3RF07 N N N N N CALAMOS CONVERTIBLE OPPORTUNITIES & INCOME FUND 549300ZBRGRX6VMFJ315 N 0 0 0 N/A N N Y N N State Street Bank and Trust Company 571474TGEMMWANRLN572 N N Other Revenue sharing split Calamos makes interest payments in connection with the leverage facility it receives from its custodian. As part of the facility agreement, the custodian generates a portion of the funding through a securities lending arrangement where securities are lent versus cash collateral. The income generated by these securities loans is retained by the custodian. The Fund pays a lower borrowing cost to the custodian than it would without the securities lending activities. 65661361.07000000 N/A Rule 12d1-1 (17 CFR 270.12d1-1) Rule 18f-4 (17 CFR 270.18f-4) Rule 18f-4(c)(4) (17CFR 270.18f-4(c)(4)) Rule 18f-4(f)(17 CFR 270.18f-4(f)) Rule 32a-4 (17 CFR 270.32a-4) N N N N Calamos Advisors LLC 801-29688 000105758 549300B31HSTBIV6QG26 N Computershare Inc. 084-05925 254900Y7PP3ZED9AUY94 N N N Bloomberg L.P. 549300B56MD0ZC402L06 N ICE Data Services, Inc. 13-3668779 Tax ID N London Stock Exchange Group PLC 213800QAUUUP6I445N30 GB N PricingDirect Inc. 549300WIC0TOJ7N7GD54 N S&P Global Inc. Y6X4K52KMJMZE7I7MY94 N N BANCO CITI MEXICO S.A. INSTITUCION DE BANCA MULTIPLE, GRUPO FINANCIERO CITI MEXICO 529900H31AYI6WA1J534 MX N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) BNP Paribas (Athens, Attica, GR, Branch) R0MUWSFPU8MPRO8K5P83 GR N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Citibank Europe Public Limited Company N1FBEDJ5J41VKZLO2475 IE N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Citibank del Peru S.A. MYTK5NHHP1G8TVFGT193 PE N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Citibank, National Association (Sao Paulo, Sao Paulo, BR, Branch) E57ODZWZ7FF32TWEFA76 BR N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Citibank, National Association (Singapore, SG, Branch) E57ODZWZ7FF32TWEFA76 SG N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Cititrust Colombia S A Sociedad Fiduciaria 549300242J3IJCOSGI49 CO N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Deutsche Bank Aktiengesellschaft (Amsterdam, Noord Holland, NL, Branch) 7LTWFZYICNSX8D621K86 NL N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Deutsche Bank Aktiengesellschaft (Taipei City, TW, Branch) 25490016G0WR60ANOK04 TW N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Euroclear Bank 549300OZ46BRLZ8Y6F65 BE N Y Foreign securities depository - rule 17f-7 (17 CFR 270.17f-7) HSBC Bank (China) Company Limited 2CZOJRADNJXBLT55G526 CN N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Intesa Sanpaolo S.p.A. 2W8N8UU78PMDQKZENC08 IT N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Mizuho Bank, Ltd. (Minato ku, Tokyo, JP, Branch) RB0PEZSDGCO3JS6CEU02 JP N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Royal Bank of Canada ES7IP3U3RHIGC71XBU11 CA N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Skandinaviska Enskilda Banken AB (Copenhagen, Hovedstaden, DK, Branch) F3JS33DEI6XQ4ZBPTN86 DK N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Standard Chartered Bank (Johannesburg, Gauteng, ZA, Branch) RILFO74KP1CM8P6PCT96 ZA N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Standard Chartered Bank (Thai) Public Company Limited 549300O1LQYCQ7G1IM57 TH N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) State Street Bank and Trust Company 571474TGEMMWANRLN572 N N Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1)) State Street Bank and Trust Company (Edinburgh, GB, Branch) 571474TGEMMWANRLN572 GB N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) State Street Trust Company Canada 549300L71XG2CTQ2V827 CA N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) The Hongkong and Shanghai Banking Corporation Limited 2HI3YI5320L3RW6NJ957 HK N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) The Hongkong and Shanghai Banking Corporation Limited (Auckland, Auckland, NZ, Branch) 2HI3YI5320L3RW6NJ957 NZ N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) The Hongkong and Shanghai Banking Corporation Limited (Jung-gu, Seoul, KR, Branch) 2HI3YI5320L3RW6NJ957 KR N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) The Hongkong and Shanghai Banking Corporation Limited (Sydney, NSW, AU, Branch) 2HI3YI5320L3RW6NJ957 AU N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) UBS Switzerland AG 549300WOIFUSNYH0FL22 CH N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) UniCredit Bank Austria AG D1HEB8VEU6D9M8ZUXG17 AT N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) UniCredit Bank Hungary Zrt. Y28RT6GGYJ696PMW8T44 HU N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Y Computershare Inc. 254900Y7PP3ZED9AUY94 N N N State Street Bank and Trust Company 571474TGEMMWANRLN572 N N N Calamos Financial Services LLC 8-37854 000019850 0.00000000 J.P. Morgan Securities LLC 8-35008 000000079 ZBUT11V806EZRVTWT807 188.90000000 Goldman Sachs & Co. LLC 8-129 000000361 FOR8UP27PHTHYVLBNG30 416.22000000 KeyBanc Capital Markets Inc. 8-30177 000000566 2EQWV0180Z211YVAD813 207.69000000 O'Neil Securities, Incorporated 8-11763 000000894 5493002J20FGJRC1XQ20 646.38000000 Stephens Inc. 8-1927 000003496 213800LH6T9XDYZCA534 311.19000000 Morgan Stanley & Co. 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LLC 8-15869 000008209 9R7GPTSO7KV3UQJZQ078 103381085.86000000 Barclays Capital Inc. 8-41342 000019714 AC28XWWI3WIBK2824319 125297637.25000000 Wells Fargo Securities, LLC 8-65876 000126292 VYVVCKR63DVZZN70PB21 77070990.73000000 BofA Securities, Inc. 8-69787 000283942 549300HN4UKV1E2R3U73 245065003.61000000 1935001586.58000000 Y 786356999.80000000 Preferred stock Series G Preferred stock Series E Preferred stock Series C Common stock Common shares Preferred stock Series D N N N N N N 1.24000000 3.98000000 11.39000000 11.12000000 true