Calamos Strategic Total Return Fund
US ˙ NasdaqGS ˙ US1281251017

SecurityCSQ / Calamos Strategic Total Return Fund
InstitutionCENTRAL TRUST Co
Latest Disclosed Ownership60,108 shares
Latest Disclosed Value $ 1,029,050
CENTRAL TRUST Co reports 0.15% increase in ownership of CSQ / Calamos Strategic Total Return Fund

On April 17, 2026 - CENTRAL TRUST Co filed a 13F-HR form disclosing ownership of 60,108 shares of Calamos Strategic Total Return Fund (US:CSQ) valued at $1,029,049 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 60,015 shares of Calamos Strategic Total Return Fund. This represents a change in shares of 0.15% during the quarter. The current value of the position is $1,232,815 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)
2026-04-17 2026-03-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 60,108 93 0.15 1,029 -10.68 0.0203
2026-02-02 2025-12-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 60,015 -24,500 -28.99 1,152 -29.33 0.0226
2025-11-06 2025-09-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 84,515 0 0.00 1,630 5.78 0.0341
2025-08-07 2025-06-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 84,515 -5,225 -5.82 1,542 6.20 0.0356
2025-04-18 2025-03-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 89,740 -1,125 -1.24 1,452 -9.82 0.0357
2025-01-24 2024-12-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 90,865 -11,963 -11.63 1,609 -9.81 0.0394
2024-10-22 2024-09-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 102,828 0 0.00 1,784 3.06 0.0418
2024-08-05 2024-06-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 102,828 -8,055 -7.26 1,732 -4.63 0.0424
2024-04-24 2024-03-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 110,883 -1,687 -1.50 1,815 8.49 0.0452
2024-01-24 2023-12-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 112,570 -9,470 -7.76 1,674 -2.56 0.0445
2023-10-26 2023-09-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 122,040 -500 -0.41 1,717 -4.98 0.0495
2023-07-26 2023-06-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 122,540 -1,400 -1.13 1,807 4.15 0.0504
2023-04-19 2023-03-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 123,940 0 0.00 1,735 4.33 0.0508
2023-01-26 2022-12-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 123,940 -375 -0.30 1,663 7.01 0.0513
2022-11-17 2022-09-30 13F/A-2 CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 124,315 -400 -0.32 1,554 -4.95 0.0533
2022-11-04 2022-09-30 13F/A-1 CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 124,715 0 1,635 0.0293
2022-11-03 2022-09-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 124,715 0 1,635 0.0293
2022-08-09 2022-06-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 124,715 0 0.00 1,635 -25.21 0.0539
2022-05-03 2022-03-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 124,715 -400 -0.32 2,186 -9.41 0.0625
2022-02-08 2021-12-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 125,115 -1,450 -1.15 2,413 7.58 0.0680
2021-10-19 2021-09-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 126,565 0 0.00 2,243 -2.61 0.0800
2021-07-23 2021-06-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 126,565 0 0.00 2,303 5.59 0.0835
2021-04-23 2021-03-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 126,565 -580 -0.46 2,181 8.62 0.0853
2021-01-29 2020-12-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 127,145 -430 -0.34 2,008 16.95 0.0821
2020-10-22 2020-09-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 127,575 -250 -0.20 1,717 8.06 0.0777
2020-07-14 2020-06-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 127,825 -2,800 -2.14 1,589 24.53 0.0797
2020-04-17 2020-03-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 130,625 -2,800 -2.10 1,276 -29.66 0.0782
2020-01-21 2019-12-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 133,425 -2,100 -1.55 1,814 5.22 0.0928
2019-10-28 2019-09-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 135,525 -510 -0.37 1,724 -2.76 0.0971
2019-07-12 2019-06-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 136,035 -90 -0.07 1,773 5.16 0.1010
2019-04-26 2019-03-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 136,125 -3,100 -2.23 1,686 14.38 0.1006
2019-01-08 2018-12-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 139,225 -1,300 -0.93 1,474 -21.93 0.0980
2018-10-04 2018-09-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 140,525 -8,450 -5.67 1,888 0.00 0.1097
2018-07-09 2018-06-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 148,975 -1,050 -0.70 1,888 6.37 0.1204
2018-04-04 2018-03-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 150,025 -2,900 -1.90 1,775 -3.90 0.1127
2018-01-23 2017-12-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 152,925 400 0.26 1,847 -0.16 0.1124
2017-10-17 2017-09-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 152,525 -5,250 -3.33 1,850 -0.11 0.1196
2017-07-14 2017-06-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 157,775 -400 -0.25 1,852 4.87 0.1224
2017-04-06 2017-03-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 158,175 -6,500 -3.95 1,766 4.44 0.1175
2017-01-24 2016-12-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 164,675 -131,270 -44.36 1,691 -44.41 0.1165
2016-10-24 2016-09-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 295,945 -6,509 -2.15 3,042 1.81 0.2218
2016-08-08 2016-06-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 302,454 5,750 1.94 2,988 5.88 0.2235
2016-04-11 2016-03-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 296,704 -10,850 -3.53 2,822 -7.29 0.2227
2016-01-21 2015-12-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 307,554 -10,416 -3.28 3,044 3.05 0.2514
2015-10-14 2015-09-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 317,970 -12,625 -3.82 2,954 -18.56 0.2570
2015-07-28 2015-06-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 330,595 -2,489 -0.75 3,627 -3.23 0.2851
2015-04-09 2015-03-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 333,084 -2,784 -0.83 3,748 -2.47 0.3016
2015-01-16 2014-12-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 335,868 3,550 1.07 3,843 -1.16 0.3131
2014-10-23 2014-09-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 332,318 -5,350 -1.58 3,888 3.54 0.3089
2014-05-07 2014-03-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 337,668 -22,827 -6.33 3,755 -4.36 0.3104
2014-01-27 2013-12-31 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 360,495 -3,546 -0.97 3,926 7.86 0.3292
2013-10-24 2013-09-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 364,041 -2,427 -0.66 3,640 -2.05 0.3297
2013-08-13 2013-06-30 13F CALAMOS STRATEGIC TOTAL RETURN MUTUAL FUNDS - 128125101 366,468 366,468 3,716 0.3527
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.