Calamos Strategic Total Return Fund
US ˙ NasdaqGS ˙ US1281251017

SecurityCSQ / Calamos Strategic Total Return Fund
InstitutionAdvisory Services Network, LLC
Latest Disclosed Ownership8,354 shares
Latest Disclosed Value $ 143,020
Advisory Services Network, LLC ownership in CSQ / Calamos Strategic Total Return Fund

On May 15, 2026 - Advisory Services Network, LLC filed a 13F-HR form disclosing ownership of 8,354 shares of Calamos Strategic Total Return Fund (US:CSQ) valued at $143,020 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 0 shares of Calamos Strategic Total Return Fund. The current value of the position is $172,510 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)
2026-05-15 2026-03-31 13F CALAMOS STRATEGIC TOTAL RETURN CEF CEF 128125101 8,354 8,354 143 0.0013
2026-02-17 2025-12-31 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 0 -10,955 -100.00 0 -100.00
2025-11-18 2025-09-30 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 10,955 0 0.00 211 5.50 0.0031
2025-08-19 2025-06-30 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 10,955 -18,242 -62.48 201 -57.63 0.0032
2025-05-15 2025-03-31 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 29,197 107 0.37 472 -8.35 0.0091
2025-02-13 2024-12-31 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 29,090 -1,099 -3.64 515 1.38 0.0096
2024-11-14 2024-09-30 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 30,189 0 0.00 508 0.00 0.0105
2024-08-13 2024-06-30 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 30,189 2,108 7.51 508 10.68 0.0105
2024-05-06 2024-03-31 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 28,081 -3,332 -10.61 460 -1.71 0.0102
2024-02-09 2023-12-31 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 31,413 -4,552 -12.66 467 -7.71 0.0114
2023-11-14 2023-09-30 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 35,965 -6,114 -14.53 506 -18.39 0.0136
2023-08-09 2023-06-30 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 42,079 7,236 20.77 621 27.31 0.0165
2023-05-17 2023-03-31 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 34,843 4,309 14.11 488 19.07 0.0135
2023-02-13 2022-12-31 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 30,534 170 0.56 410 7.63 0.0126
2022-11-14 2022-09-30 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 30,364 153 0.51 380 -4.04 0.0134
2022-08-02 2022-06-30 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 30,211 149 0.50 396 -24.86 0.0135
2022-05-23 2022-03-31 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 30,062 121 0.40 527 -8.82 0.0155
2022-02-14 2021-12-31 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 29,941 -287 -0.95 578 7.84 0.0166
2021-11-05 2021-09-30 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 30,228 112 0.37 536 -2.19 0.0170
2021-08-12 2021-06-30 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 30,116 113 0.38 548 6.00 0.0173
2021-05-24 2021-03-31 13F CALAMOS STRATEGIC TOTAL RETU CEF 128125101 30,003 115 0.38 517 9.53 0.0192
2021-02-09 2020-12-31 13F CALAMOS STRATEGIC TOTL RETN CEF 128125101 29,888 -631 -2.07 472 14.84 0.0189
2020-11-16 2020-09-30 13F CALAMOS STRATEGIC TOTL RETN CEF 128125101 30,519 127 0.42 411 8.73 0.0193
2020-08-10 2020-06-30 13F CALAMOS STRATEGIC TOTAL RETURN CEF CEF 128125101 30,392 147 0.49 378 28.14 0.0207
2020-05-15 2020-03-31 13F CALAMOS STRATEGIC TOTL RETN CEF 128125101 30,245 -983 -3.15 295 -30.59 0.0193
2020-02-04 2019-12-31 13F CALAMOS STRATEGIC TOTL RETN CEF 128125101 31,228 31,228 425 0.0224
2019-08-01 2019-06-30 13F CALAMOS STRATEGIC TOTL RETN CEF 128125101 0 -216 -100.00 0 -100.00
2019-05-20 2019-03-31 13F CALAMOS STRATEGIC TOTL RETN CEF 128125101 216 -8,133 -97.41 3 -96.59 0.0002
2019-02-15 2018-12-31 13F CALAMOS STRATEGIC TOTL RETN CEF 128125101 8,349 0 0.00 88 -21.43 0.0077
2018-11-02 2018-09-30 13F CALAMOS STRATEGIC TOTL RETN CEF 128125101 8,349 0 0.00 112 2.75 0.0082
2018-07-27 2018-06-30 13F CALAMOS STRATEGIC TOTL RETN CEF 128125101 8,349 -25,750 -75.52 109 -72.95 0.0083
2018-04-23 2018-03-31 13F CALAMOS STRATEGIC TOTL RETN CEF 128125101 34,099 471 1.40 403 -0.74 0.0322
2018-02-08 2017-12-31 13F CALAMOS STRATEGIC TOTL RETN CEF 128125101 33,628 -8,621 -20.41 406 -20.70 0.0354
2017-10-12 2017-09-30 13F CALAMOS STRATEGIC TOTL RETN CEF 128125101 42,249 471 1.13 512 4.49 0.0586
2017-08-17 2017-06-30 13F CALAMOS STRATEGIC TOTL RETN FD COM SH BEN INT CEF 128125101 41,778 476 1.15 490 6.29 0.0639
2017-04-28 2017-03-31 13F CALAMOS STRATEGIC TOTL RETN FD COM SH BEN INT CEF 128125101 41,302 16,468 66.31 461 80.78 0.0670
2016-10-07 2016-09-30 13F CALAMOS STRATEGIC TOTL RETN CEF 128125101 24,834 24,397 5,582.84 255 6,275.00 0.0479
2016-07-27 2016-06-30 13F CALAMOS STRATEGIC TOTL RETN CEF 128125101 437 -4,576 -91.28 4 -91.67 0.0009
2016-04-21 2016-03-31 13F CALAMOS STRATEGIC TOTL RETN CEF 128125101 5,013 5,013 0.00 48 0.0131
2015-07-02 2015-06-30 13F CALAMOS STRATEGIC TOTL RETN FD COM SH BEN INT CEF 128125101 0 -9,915 -100.00 0 -100.00
2015-04-08 2015-03-31 13F CALAMOS STRATEGIC TOTL RETN FD COM SH BEN INT CEF 128125101 9,915 -700 -6.59 111 -7.50 0.0306
2015-01-23 2014-12-31 13F CALAMOS STRATEGIC TOTL RETN FD COM SH BEN INT CEF 128125101 10,615 3,911 58.34 120 64.38 0.0375
2014-02-13 2013-12-31 13F CALAMOS STRATEGIC TOTL RETN CEF 128125101 6,704 6,704 73 0.0367
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.