Calamos Strategic Total Return Fund
US ˙ NasdaqGS ˙ US1281251017

SecurityCSQ / Calamos Strategic Total Return Fund
InstitutionDAVENPORT & Co LLC
Latest Disclosed Ownership167,224 shares
Latest Disclosed Value $ 2,862,872
DAVENPORT & Co LLC ownership in CSQ / Calamos Strategic Total Return Fund

On April 15, 2026 - DAVENPORT & Co LLC filed a 13F-HR form disclosing ownership of 167,224 shares of Calamos Strategic Total Return Fund (US:CSQ) valued at $2,862,875 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 12, 2026 disclosing 203,378 shares of Calamos Strategic Total Return Fund. This represents a change in shares of -17.78% during the quarter. The current value of the position is $3,339,463 USD.

DAVENPORT & Co LLC has a history of taking positions in derivatives of the underlying security (CSQ) in the form of stock options.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

CSQ / Calamos Strategic Total Return Fund Historical Put/Call Ratio
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)
2026-04-15 2026-03-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 167,224 -36,154 -17.78 2,863 -26.69 0.0156
2026-01-12 2025-12-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 203,378 -699 -0.34 3,905 -0.81 0.0208
2025-10-15 2025-09-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 204,077 -2,651 -1.28 3,937 4.40 0.0210
2025-07-22 2025-06-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 206,728 -8,581 -3.99 3,771 8.24 0.0205
2025-04-28 2025-03-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 215,309 -10,875 -4.81 3,484 -13.03 0.0202
2025-01-24 2024-12-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 226,184 17,640 8.46 4,006 10.70 0.0226
2024-10-24 2024-09-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 208,544 -2,128 -1.01 3,618 2.00 0.0205
2024-08-06 2024-06-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 210,672 -2,898 -1.36 3,548 1.46 0.0214
2024-05-03 2024-03-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 213,570 -10,962 -4.88 3,496 4.73 0.0214
2024-01-23 2023-12-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 224,532 -5,351 -2.33 3,339 3.22 0.0227
2023-10-17 2023-09-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 229,883 -8,789 -3.68 3,234 -8.12 0.0245
2023-07-20 2023-06-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 238,672 4,551 1.94 3,520 7.42 0.0258
2023-04-27 2023-03-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 234,121 -2,928 -1.24 3,278 3.02 0.0257
2023-01-20 2022-12-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 237,049 -520 -0.22 3,181 7.10 0.0260
2022-10-11 2022-09-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 237,569 3,044 1.30 2,970 -3.41 0.0258
2022-07-18 2022-06-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 234,525 25,775 12.35 3,075 -15.96 0.0252
2022-05-02 2022-03-31 13F/A-1 CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 208,750 8,228 4.10 3,659 -5.40 0.0250
2022-05-02 2022-03-31 13F CSQ COM SH BEN INT 128125101 208,750 8,228 3,659 0.0250
2022-02-10 2021-12-31 13F CSQ COM SH BEN INT 128125101 200,522 2,948 1.49 3,868 10.48 0.0254
2021-10-14 2021-09-30 13F CSQ COM SH BEN INT 128125101 197,574 -1,834 -0.92 3,501 -3.47 0.0247
2021-07-28 2021-06-30 13F/A-2 CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 199,408 6,486 3.36 3,627 9.12 0.0279
2021-04-28 2021-03-31 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT 128125101 192,922 11,783 6.50 3,324 16.22 0.0312
2021-01-13 2020-12-31 13F CSQ COM 128125101 181,139 5,268 3.00 2,860 20.83 0.0281
2020-10-15 2020-09-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 175,871 18,593 11.82 2,367 21.07 0.0265
2020-07-28 2020-06-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 157,278 16,661 11.85 1,955 42.29 0.0238
2020-05-05 2020-03-31 13F CSQ COM 128125101 140,617 6,100 4.53 1,374 -24.88 0.0198
2020-01-22 2019-12-31 13F CSQ COM 128125101 134,517 5,550 4.30 1,829 11.12 0.0196
2019-10-16 2019-09-30 13F CSQ COM 128125101 128,967 -1,500 -1.15 1,646 -1.14 0.0196
2019-07-10 2019-06-30 13F CSQ COM 128125101 130,467 9,700 8.03 1,665 11.30 0.0198
2019-04-17 2019-03-31 13F CSQ COM 128125101 120,767 16,150 15.44 1,496 35.02 0.0187
2019-01-28 2018-12-31 13F CSQ COM 128125101 104,617 -3,690 -3.41 1,108 -23.90 0.0153
2018-10-11 2018-09-30 13F CSQ COM 128125101 108,307 16,000 17.33 1,456 145,500.00 0.0169
2018-07-09 2018-06-30 13F CSQ COM 128125101 92,307 -2,800 -2.94 1 -99.91 0.0144
2018-04-04 2018-03-31 13F CSQ COM 128125101 95,107 -900 -0.94 1,125 -2.93 0.0139
2018-01-17 2017-12-31 13F CSQ COM 128125101 96,007 -4,710 -4.68 1,160 -5.08 0.0139
2017-10-12 2017-09-30 13F CSQ COM 128125101 100,717 70,300 231.12 1,222 242.02 0.0155
2017-07-18 2017-06-30 13F/A-1 CSQ COM 128125101 30,417 8,057 36.03 357 55.90 0.0047
2017-07-10 2017-06-30 13F CSQ COM 128125101 21,017 216
2017-04-11 2017-03-31 13F CSQ COM 128125101 22,360 -800 -3.45 230 -35.85 0.0033
2017-01-05 2016-12-31 13F CSQ COM 128125101 23,160 6,400 38.19 0 -100.00 0.0034
2016-10-19 2016-09-30 13F CSQ COM 128125101 16,760 0 0.00 172 4.24 0.0025
2016-07-12 2016-06-30 13F CSQ COM 128125101 16,760 -4,000 -19.27 166 -16.24 0.0025
2016-04-25 2016-03-31 13F CSQ COM 128125101 20,760 -3,000 -12.63 197 -16.17 0.0031
2016-01-20 2015-12-31 13F CSQ COM 128125101 23,760 -4,000 -14.41 235 -8.56 0.0038
2015-10-23 2015-09-30 13F CSQ COM 128125101 27,760 2,500 9.90 258 -7.22 0.0043
2015-08-12 2015-06-30 13F CALAMOS STRATEGIC TOTAL COM 128125101 25,260 -730 -2.81 277 -5.14 0.0043
2015-04-24 2015-03-31 13F CALAMOS STRATEGIC TOTAL COM 128125101 25,990 25,990 2.89 293 5.42 0.0045
2015-02-04 2014-12-31 13F CALAMOS STRATEGIC TOTAL COM 128125101 0 -29,090 -100.00 0 -100.00
2014-10-10 2014-09-30 13F CALAMOS STRATEGIC TOTAL COM 128125101 29,090 500 1.75 340 -0.87 0.0059
2014-07-25 2014-06-30 13F CALAMOS STRATEGIC TOTAL COM 128125101 28,590 0 0.00 343 8.20 0.0058
2014-04-21 2014-03-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 28,590 -4,000 -12.27 318 -99.91 0.0058
2014-01-31 2013-12-31 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 32,590 -2,140 -6.16 354,910 2.19 0.0066
2013-11-05 2013-09-30 13F/A-1 CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 34,730 600 1.76 347,304 0.35 0.0072
2013-11-01 2013-09-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 34,130 346,083
2013-08-12 2013-06-30 13F CALAMOS STRATEGIC TOTL RETN COM SH BEN INT 128125101 34,130 34,130 346,083 0.0076
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2021-10-14 2021-09-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-07-21 2021-06-30 13F CALAMOS STRATEGIC TOTAL RETU COM SH BEN INT Put 199,408 3,627 n/a n/a n/a
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.