Calamos Convertible Opportunities and Income Fund
US ˙ NasdaqGS ˙ US1281171082

SecurityCHI / Calamos Convertible Opportunities and Income Fund
InstitutionSigma Planning Corp
Latest Disclosed Ownership30,636 shares
Latest Disclosed Value $ 329,026
Sigma Planning Corp reports 1.19% increase in ownership of CHI / Calamos Convertible Opportunities and Income Fund

On May 4, 2026 - Sigma Planning Corp filed a 13F-HR form disclosing ownership of 30,636 shares of Calamos Convertible Opportunities and Income Fund (US:CHI) valued at $329,031 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 30,277 shares of Calamos Convertible Opportunities and Income Fund. This represents a change in shares of 1.19% during the quarter. The current value of the position is $389,996 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-04 2026-03-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 30,636 359 1.19 329 3.79 0.0091
2026-01-30 2025-12-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 30,277 -4,334 -12.52 317 -15.01 0.0088
2025-11-10 2025-09-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 34,611 -4,144 -10.69 373 -8.35 0.0106
2025-08-05 2025-06-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 38,755 -21,579 -35.77 408 -29.58 0.0123
2025-05-02 2025-03-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 60,334 1,539 2.62 579 -17.66 0.0185
2025-02-03 2024-12-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 58,795 6,658 12.77 702 15.84 0.0220
2024-11-04 2024-09-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 52,137 -110 -0.21 607 -0.33 0.0186
2024-08-06 2024-06-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 52,247 1,250 2.45 608 5.19 0.0193
2024-05-02 2024-03-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 50,997 50,997 579 0.0182
2024-02-01 2023-12-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 0 -74,878 -100.00 0 -100.00
2023-11-06 2023-09-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 74,878 647 0.87 789 -5.05 0.0296
2023-08-02 2023-06-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 74,231 -14,612 -16.45 831 -11.03 0.0299
2023-05-08 2023-03-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 88,843 1,480 1.69 935 1.74 0.0311
2023-01-24 2022-12-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 87,363 5,473 6.68 918 16.06 0.0328
2022-11-10 2022-09-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 81,890 2,874 3.64 791 -6.61 0.0302
2022-08-11 2022-06-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 79,016 3,973 5.29 847 -14.53 0.0294
2022-04-20 2022-03-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 75,043 -21,087 -21.94 991 -31.80 0.0297
2022-02-02 2021-12-31 13F CALAMOS CONV OPPORTUNITIES & INCOME FD CEF 128117108 96,130 -308 -0.32 1,453 0.62 0.0405
2021-10-28 2021-09-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 96,438 -4,322 -4.29 1,444 -5.56 0.0434
2021-08-13 2021-06-30 13F CALAMOS CONV OPPORTUNITIES & INCOME FD CEF 128117108 100,760 3,355 3.44 1,529 10.40 0.0456
2021-05-06 2021-03-31 13F CALAMOS CONV OPPORTUNITIES & INCOME FD CEF 128117108 97,405 7,157 7.93 1,385 13.34 0.0442
2021-02-09 2020-12-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 90,248 -1,531 -1.67 1,222 20.99 0.0416
2020-11-03 2020-09-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 91,779 -9,297 -9.20 1,010 -6.05 0.0400
2020-07-31 2020-06-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 101,076 -20,766 -17.04 1,075 5.81 0.0472
2020-05-01 2020-03-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 121,842 3,691 3.12 1,016 -21.85 0.0603
2020-02-03 2019-12-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 118,151 -4,429 -3.61 1,300 1.88 0.0548
2019-11-01 2019-09-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 122,580 2,083 1.73 1,276 0.79 0.0612
2019-08-01 2019-06-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 120,497 49,622 70.01 1,266 76.08 0.0652
2019-05-01 2019-03-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 70,875 -9,640 -11.97 719 0.84 0.0408
2019-01-31 2018-12-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 80,515 -26,518 -24.78 713 -44.69 0.0519
2018-11-07 2018-09-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 107,033 -13,190 -10.97 1,289 -9.03 0.0758
2018-08-02 2018-06-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 120,223 4,178 3.60 1,417 10.02 0.0949
2018-05-11 2018-03-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 116,045 7,635 7.04 1,288 6.18 0.0942
2018-02-07 2017-12-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 108,410 18,238 20.23 1,213 16.63 0.0934
2017-11-06 2017-09-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 90,172 8,763 10.76 1,040 13.41 0.0858
2017-08-02 2017-06-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 81,409 15,378 23.29 917 26.31 0.0862
2017-04-24 2017-03-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 66,031 41,873 173.33 726 197.54 0.0703
2017-01-23 2016-12-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 24,158 5,802 31.61 244 28.42 0.0267
2016-11-07 2016-09-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 18,356 -2,779 -13.15 190 -8.65 0.0225
2016-07-22 2016-06-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 21,135 21,135 0.00 208 0.0271
2015-07-14 2015-06-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 0 -11,612 -100.00 0 -100.00
2015-04-23 2015-03-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 11,612 32 0.28 151 1.34 0.0200
2015-02-13 2014-12-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 11,580 11,580 149 0.0197
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.