Calamos Strategic Total Return Fund
US ˙ NasdaqGS ˙ US1281251017

SecurityCSQ / Calamos Strategic Total Return Fund
InstitutionPrivate Advisor Group, LLC
Latest Disclosed Ownership81,943 shares
Latest Disclosed Value $ 1,402,859
Private Advisor Group, LLC reports 0.67% increase in ownership of CSQ / Calamos Strategic Total Return Fund

On April 24, 2026 - Private Advisor Group, LLC filed a 13F-HR form disclosing ownership of 81,943 shares of Calamos Strategic Total Return Fund (US:CSQ) valued at $1,402,864 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 81,394 shares of Calamos Strategic Total Return Fund. This represents a change in shares of 0.67% during the quarter. The current value of the position is $1,680,651 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)
2026-04-24 2026-03-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 81,943 549 0.67 1,403 -10.24 0.0062
2026-02-17 2025-12-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 81,394 4,659 6.07 1,563 5.54 0.0070
2025-11-13 2025-09-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 76,735 4,342 6.00 1,480 12.12 0.0073
2025-08-11 2025-06-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 72,393 4,084 5.98 1,320 19.46 0.0071
2025-05-05 2025-03-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 68,309 2,687 4.09 1,105 -4.91 0.0067
2025-02-03 2024-12-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 65,622 9,366 16.65 1,162 19.06 0.0065
2024-10-22 2024-09-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 56,256 8,681 18.25 976 21.85 0.0061
2024-08-05 2024-06-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 47,575 175 0.37 801 3.35 0.0054
2024-04-30 2024-03-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 47,400 828 1.78 776 11.99 0.0056
2024-02-06 2023-12-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 46,572 -4,410 -8.65 693 -3.49 0.0054
2023-11-03 2023-09-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 50,982 845 1.69 717 -2.98 0.0064
2023-08-10 2023-06-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 50,137 4,833 10.67 740 16.56 0.0064
2023-05-10 2023-03-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 45,304 -1,249 -2.68 634 0.0061
2023-01-18 2022-12-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 46,553 7,722 19.89 1 -100.00 0.0000
2022-10-14 2022-09-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 38,831 852 2.24 485 -2.61 0.0056
2022-07-13 2022-06-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 37,979 3,965 11.66 498 -16.44 0.0044
2022-05-12 2022-03-31 13F/A-1 CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 34,014 2,070 6.48 596 -3.25 0.0046
2022-05-10 2022-03-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 31,944 0 616 0.0046
2022-02-10 2021-12-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 31,944 2,950 10.17 616 19.84 0.0046
2021-10-14 2021-09-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 28,994 -1,220 -4.04 514 -6.55 0.0033
2021-08-12 2021-06-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 30,214 0 0.00 550 5.57 0.0048
2021-04-22 2021-03-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 30,214 0 0.00 521 9.22 0.0050
2021-04-01 2020-12-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 30,214 -250 -0.82 477 16.34 0.0050
2020-11-02 2020-09-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 30,464 -200 -0.65 410 7.61 0.0053
2020-08-17 2020-06-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 30,664 1,100 3.72 381 31.83 0.0053
2020-05-12 2020-03-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 29,564 -11,525 -28.05 289 -48.30 0.0053
2020-02-10 2019-12-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 41,089 -1,482 -3.48 559 3.14 0.0087
2019-11-13 2019-09-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 42,571 -300 -0.70 542 -0.91 0.0084
2019-08-14 2019-06-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 42,871 100 0.23 547 3.21 0.0099
2019-05-13 2019-03-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 42,771 -761 -1.75 530 14.97 0.0105
2019-02-08 2018-12-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 43,532 275 0.64 461 -20.65 0.0111
2018-11-01 2018-09-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 43,257 18,649 75.78 581 86.22 0.0119
2018-08-09 2018-06-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 24,608 8,809 55.76 312 66.84 0.0051
2018-05-09 2018-03-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 15,799 -7,969 -33.53 187 -36.39 0.0073
2018-02-07 2017-12-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 23,768 -17,365 -42.22 294 -42.13 0.0124
2017-11-13 2017-09-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 41,133 1,000 2.49 508 8.09 0.0126
2017-08-10 2017-06-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 40,133 -2,340 -5.51 470 -0.63 0.0127
2017-05-10 2017-03-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 42,473 -84,273 -66.49 473 -65.12 0.0132
2017-02-09 2016-12-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 126,746 -12,046 -8.68 1,356 -4.03 0.0445
2016-11-10 2016-09-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 138,792 8,192 6.27 1,413 7.37 0.0576
2016-08-09 2016-06-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 130,600 5,376 4.29 1,316 10.50 0.0532
2016-05-13 2016-03-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 125,224 65,819 110.80 1,191 102.55 0.0575
2016-02-09 2015-12-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 59,405 13,788 30.23 588 38.68 0.0282
2015-11-13 2015-09-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 45,617 800 1.79 424 -13.82 0.0233
2015-08-13 2015-06-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 44,817 -363 -0.80 492 -3.34 0.0233
2015-05-13 2015-03-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 45,180 221 0.49 509 -0.97 0.0293
2015-02-17 2014-12-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 44,959 3,963 9.67 514 7.08 0.0331
2014-11-12 2014-09-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 40,996 -1,000 -2.38 480 -4.76 0.0332
2014-08-08 2014-06-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 41,996 100 0.24 504 8.15 0.0434
2014-05-15 2014-03-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 41,896 23,241 124.58 466 129.56 0.0491
2014-02-13 2013-12-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 18,655 18,655 203 0.0227
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.