X0201 N-CEN/A 0001145549-19-001381 LIVE 0001171471 XXXXXXXX false false false N-2 Calamos Convertible Opportunities & Income Fund 811-21080 0001171471 549300ZBRGRX6VMFJ315 2020 Calamos Court Naperville 60563 US-IL US 6302457200 State Street Bank and Trust Company 1 Lincoln Street Boston 02111 6177863000 Records related to custody of fund assets State Street Bank and Trust Company 1 Lincoln Street Boston 02111 6177863000 Mutual fund accounting records Computershare P.O. Box 30170 College Station 77842 8662268016 All records in its capacity as transfer agent Calamos Advisors LLC 2020 Calamos Court Naperville 60563 6302457200 All records in its capacity as investment adviser Y N N-2 Y John P. Calamos, Sr. 000038210 Y John E. Neal N/A N William R. Rybak N/A N Stephen B. Timbers N/A N David D. Tripple N/A N Virginia G Breen N/A N Lloyd A. Wennlund 001512907 N Mark Mickey 002902992 2020 Calamos Court Naperville 60563 XXXXXX N N N N N N Deloitte & Touche LLP 00034 N/A N N N N N N Calamos Convertible Opportunities & Income Fund 549300ZBRGRX6VMFJ315 Y N/A N N Y N N State Street Bank and Trust Company 571474TGEMMWANRLN572 N N Revenue sharing split Other 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 are shared between Calamos and the custodian. The income attributable to Calamos is deducted from our facility interest payments. 260527424.331667000000 N/A Rule 17a-7 (17 CFR 270.17a-7) Rule 32a-4 (17 CFR 270.32a-4) N N N N Calamos Advisors LLC 801-29688 000105758 549300B31HSTBIV6QG26 N Computershare 85-05006 N/A N N N Bloomberg Valuation Service 549300B56MD0ZC402L06 N ICE Data Services 5493000NQ9LYLDBCTL34 N Thomson Reuters Markets, LLC 20-4530702 Federal Tax ID number N Markit North America, Inc 549300HLPTRASHS0E726 N N State Street Bank and Trust Company 571474TGEMMWANRLN572 N N Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1)) Federal Reserve Bank N/A N Y Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1)) Euroclear N/A BE N Y Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) Depository Trust and Clearing Corporation N/A N Y Securities depository - rule 17f-4 (17 CFR 270.17f-4) N Computershare 85-05006 SEC File Number N N N Calamos Advisors LLC 549300B31HSTBIV6QG26 Y N State Street Bank and Trust 571474TGEMMWANRLN572 N Y N Calamos Financial Services LLC 8-37854 000019850 N/A 0.000000000000 JPMorgan Chase Securities, Inc. 008-35008 N/A N/A 28180.860000000000 Tourmaline Partners 008-68644 N/A N/A 960.000000000000 Morgan Stanley & Co., Inc. 008-15869 N/A N/A 15888.800000000000 Susquehanna Investments 008-37520 N/A N/A 8460.000000000000 Credit Suisse First Boston 008-52352 N/A N/A 4568.970000000000 Citigroup, Inc. 008-08177 N/A N/A 4088.640000000000 Jefferies & Company, Inc. 008-15074 N/A N/A 2301.300000000000 Wells Fargo Securities 008-22947 N/A N/A 1980.000000000000 Nomura Securities International Inc. 008-15255 N/A N/A 1440.000000000000 Investment Technology Group 008-44218 N/A N/A 1134.600000000000 73130.390000000000 JPMorgan Chase Securities, Inc. 008-35008 N/A N/A 191114015.040000000000 Robert W. Baird Co. 008-00497 N/A N/A 37174686.050000000000 Bank of America, N.A. 008-07221 N/A N/A 168738263.820000000000 Jefferies & Company, Inc. 008-15074 N/A N/A 121032967.390000000000 Barclays Capital Inc. 008-41342 N/A N/A 111546277.060000000000 Goldman Sachs & Co. 008-00129 N/A N/A 98971817.210000000000 Citigroup, Inc. 008-08177 N/A N/A 95176055.750000000000 Morgan Stanley & Co., Inc. 008-15869 N/A N/A 76515476.060000000000 Wells Fargo Securities LLC 008-22947 N/A N/A 66265191.660000000000 Mizuho Securities US 008-37710 N/A N/A 40107228.300000000000 1197945130.760000000000 Y 788743726.340000000000 Common stock 1 Preferred stock Series A Preferred stock Series B Preferred stock Series C N N N N N N 1.190000000000 2.520000000000 9.910000000000 10.460000000000 true