Calamos Convertible Opportunities and Income Fund
US ˙ NasdaqGS ˙ US1281171082

SecurityCHI / Calamos Convertible Opportunities and Income Fund
InstitutionStifel Financial Corp
Latest Disclosed Ownership79,237 shares
Latest Disclosed Value $ 851,000
Stifel Financial Corp reports 6.65% increase in ownership of CHI / Calamos Convertible Opportunities and Income Fund

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 79,237 shares of Calamos Convertible Opportunities and Income Fund (US:CHI) valued at $851,005 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 74,297 shares of Calamos Convertible Opportunities and Income Fund. This represents a change in shares of 6.65% during the quarter. The current value of the position is $1,008,687 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-12 2026-03-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 79,237 4,940 6.65 851 9.38 0.0002
2026-02-13 2025-12-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 74,297 37,115 99.82 779 94.01 0.0007
2025-11-12 2025-09-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 37,182 266 0.72 401 3.35 0.0004
2025-08-14 2025-06-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 36,916 9,960 36.95 388 50.39 0.0004
2025-05-14 2025-03-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 26,956 3,688 15.85 259 -6.86 0.0003
2025-02-13 2024-12-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 23,268 -2,304 -9.01 278 -6.73 0.0003
2024-11-14 2024-09-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 25,572 -1,531 -5.65 298 -5.71 0.0003
2024-08-13 2024-06-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 27,103 48 0.18 315 2.61 0.0004
2024-05-14 2024-03-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 27,055 -1,446 -5.07 307 4.07 0.0003
2024-02-12 2023-12-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 28,501 -4,719 -14.21 295 -15.71 0.0004
2023-11-13 2023-09-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 33,220 1,620 5.13 350 -0.85 0.0005
2023-08-14 2023-06-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 31,600 3,405 12.08 354 19.26 0.0005
2023-05-12 2023-03-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 28,195 -2,178 -7.17 297 -7.21 0.0004
2023-02-13 2022-12-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 30,373 6,549 27.49 319 38.70 0.0005
2022-11-14 2022-09-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 23,824 1,068 4.69 230 -5.74 0.0004
2022-08-15 2022-06-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 22,756 1,587 7.50 244 -12.86 0.0004
2022-05-13 2022-03-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 21,169 -58,292 -73.36 280 -76.69 0.0004
2022-02-14 2021-12-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 79,461 702 0.89 1,201 1.87 0.0016
2021-11-15 2021-09-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 78,759 500 0.64 1,179 -0.67 0.0017
2021-08-13 2021-06-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 78,259 -376 -0.48 1,187 6.17 0.0018
2021-05-14 2021-03-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 78,635 2,739 3.61 1,118 8.75 0.0018
2021-02-12 2020-12-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 75,896 21,369 39.19 1,028 71.33 0.0018
2020-11-16 2020-09-30 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 54,527 29,621 118.93 600 126.42 0.0012
2020-08-14 2020-06-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 24,906 3,822 18.13 265 49.72 0.0006
2020-05-14 2020-03-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 21,084 -9,902 -31.96 177 -48.55 0.0005
2020-02-13 2019-12-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 30,986 6,589 27.01 344 37.05 0.0007
2019-11-19 2019-09-30 13F/A-1 CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 24,397 1,204 5.19 251 3.72 0.0006
2019-11-13 2019-09-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 24,397 1,204 251 140.6981
2019-08-14 2019-06-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 23,193 -2,324 -9.11 242 -5.10 0.0006
2019-05-14 2019-03-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 25,517 8,276 48.00 255 66.67 0.0007
2019-02-13 2018-12-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 17,241 -3,578 -17.19 153 -38.55 0.0005
2018-11-13 2018-09-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 20,819 1,051 5.32 249 6.41 0.0007
2018-08-14 2018-06-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 19,768 -1,925 -8.87 234 -3.31 0.0007
2018-05-11 2018-03-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 21,693 1,333 6.55 242 5.68 0.0008
2018-02-14 2017-12-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 20,360 -26,607 -56.65 229 -57.75 0.0007
2017-11-13 2017-09-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 46,967 7,006 17.53 542 20.98 0.0019
2017-08-14 2017-06-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 39,961 1,282 3.31 448 5.16 0.0017
2017-05-10 2017-03-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 38,679 -353 -0.90 426 8.95 0.0016
2017-02-16 2016-12-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 39,032 464 1.20 391 -1.51 0.0017
2016-11-15 2016-09-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 38,568 -3,170 -7.59 397 -3.41 0.0018
2016-08-17 2016-06-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 41,738 -8,367 -16.70 411 -13.47 0.0019
2016-05-16 2016-03-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 50,105 4,776 10.54 475 5.79 0.0025
2016-03-21 2015-12-31 13F/A-2 CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 45,329 -1,652 -3.52 449 -3.44 0.0023
2016-02-26 2015-12-31 13F/A-1 CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 45,052 -277 446 0.0023
2016-02-16 2015-12-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 45,052 446
2015-11-16 2015-09-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 46,981 2,898 6.57 465 -13.57 0.0026
2015-08-17 2015-06-30 13F/A-1 CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 44,083 -50,139 -53.21 538 -56.01 0.0028
2015-08-17 2015-06-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 44,083 538
2015-05-14 2015-03-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 94,222 -2,792 -2.88 1,223 -1.85 0.0067
2015-02-13 2014-12-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 97,014 -109,367 -52.99 1,246 -55.37 0.0069
2014-11-13 2014-09-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 206,381 68,457 49.63 2,792 44.29 0.0245
2014-08-14 2014-06-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 137,924 100,468 268.23 1,935 274.27 0.0174
2014-05-15 2014-03-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 37,456 37,456 517 0.0049
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.