Calamos Convertible Opportunities and Income Fund
US ˙ NasdaqGS ˙ US1281171082

SecurityCHI / Calamos Convertible Opportunities and Income Fund
InstitutionFlagship Harbor Advisors, Llc
Latest Disclosed Ownership27,486 shares
Latest Disclosed Value $ 295,196
Flagship Harbor Advisors, Llc reports 183.98% increase in ownership of CHI / Calamos Convertible Opportunities and Income Fund

On April 28, 2026 - Flagship Harbor Advisors, Llc filed a 13F-HR form disclosing ownership of 27,486 shares of Calamos Convertible Opportunities and Income Fund (US:CHI) valued at $295,200 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 21, 2026 disclosing 9,679 shares of Calamos Convertible Opportunities and Income Fund. This represents a change in shares of 183.98% during the quarter. The current value of the position is $349,897 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)
2026-04-28 2026-03-31 13F CALAMOS CONV OPPORTUNITIES SH BEN INT 128117108 27,486 17,807 183.98 295 192.08 0.0130
2026-01-21 2025-12-31 13F CALAMOS CONVERTIBLE MF Closed and MF Open 128117108 9,679 9,679 101 0.0048
2021-02-08 2020-12-31 13F CALAMOS CONVERTIBLE MF Closed and MF Open 128117108 0 -7,500 -100.00 0 -100.00
2020-10-13 2020-09-30 13F CALAMOS CONVERTIBLE MF Closed and MF Open 128117108 7,500 0 0.00 82 3.80 0.0111
2020-07-31 2020-06-30 13F CALAMOS CONVERTIBLE MF Closed and MF Open 128117108 7,500 500 7.14 79 36.21 0.0116
2020-05-12 2020-03-31 13F CALAMOS CONVERTIBLE MF Closed and MF Open 128117108 7,000 0 0.00 58 -24.68 0.0116
2020-02-14 2019-12-31 13F CALAMOS CONVERTIBLE MF Closed and MF Open 128117108 7,000 0 0.00 77 6.94 0.0135
2019-10-22 2019-09-30 13F CALAMOS CONVERTIBLE MF Closed and MF Open 128117108 7,000 -500 -6.67 72 -7.69 0.0141
2019-07-22 2019-06-30 13F CALAMOS CONVERTIBLE MF Closed and MF Open 128117108 7,500 -7,957 -51.48 78 -50.00 0.0162
2019-04-15 2019-03-31 13F CALAMOS CONVERTIBLE MF Closed and MF Open 128117108 15,457 3,000 24.08 156 41.82 0.0320
2019-01-26 2018-12-31 13F CALAMOS CONVERTIBLE ETF 128117108 12,457 1,400 12.66 110 -18.52 0.0267
2018-11-05 2018-09-30 13F CALAMOS CONVERTIBLE MF Closed and MF Open 128117108 11,057 -500 -4.33 135 -0.74 0.0250
2018-08-14 2018-06-30 13F CALAMOS CONVERTIBLE ETF 128117108 11,557 0 0.00 136 6.25 0.0272
2018-04-23 2018-03-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 11,557 0 0.00 128 -0.78 0.0381
2018-01-24 2017-12-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 11,557 0 0.00 129 -3.73 0.0371
2017-10-23 2017-09-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 11,557 0 0.00 134 3.88 0.0435
2017-08-09 2017-06-30 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 11,557 -730 -5.94 129 -5.15 0.0448
2017-05-16 2017-03-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 12,287 1,000 8.86 136 14.29 0.0520
2017-05-15 2016-12-31 13F CALAMOS CONV OPP AND INC FD SH BEN INT 128117108 11,287 11,287 119 0.0514
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.