CALAMOS STRATEGIC TOTAL RETURN FUND

Symbol
CSQ on Nasdaq
Business address
2020 Calamos Court, C/O Calamos Advisors Llc, Naperville, IL, 60563
Fiscal year end
31 October
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CALAMOS STRATEGIC TOTAL RETURN FUND has filed 431 SEC EDGAR filings since 07 Jan 2004

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
SCHEDULE 13G/A Open Document Open Filing 14 Nov 2025 005-84333
NPORT-P Open Document Open Filing 29 Sep 2025 31 Jul 2025 811-21484
40-17G/A Open Document Open Filing 40-17G/A 16 Sep 2025 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT 12 Sep 2025 02 Sep 2025
3/A Open Document Open Filing PRIMARY DOCUMENT 09 Sep 2025 01 Sep 2025
3 Open Document Open Filing PRIMARY DOCUMENT 09 Sep 2025 01 Sep 2025
3 Open Document Open Filing PRIMARY DOCUMENT 09 Sep 2025 01 Sep 2025
N-PX Open Document Open Filing 27 Aug 2025 30 Jun 2025 811-21484
SCHEDULE 13G/A Open Document Open Filing 14 Aug 2025 005-84333
3 Open Document Open Filing PRIMARY DOCUMENT 04 Aug 2025 29 Jul 2025
N-CSRS Open Document | Data Open Filing N-CSRS 27 Jun 2025 30 Apr 2025 811-21484
NPORT-P Open Document Open Filing 27 Jun 2025 30 Apr 2025 811-21484
40-17G Open Document Open Filing 40-17G 26 Jun 2025 811-21484
SCHEDULE 13G/A Open Document Open Filing 15 May 2025 005-84333
DEF 14A Open Document Open Filing DEF 14A 12 May 2025 23 Jun 2025 811-21484
CORRESP Open Document Open Filing 25 Apr 2025
NPORT-P Open Document Open Filing 25 Mar 2025 31 Jan 2025 811-21484
40-17G/A Open Document Open Filing 40-17G/A 13 Mar 2025 811-21484
SCHEDULE 13G/A Open Document Open Filing 14 Feb 2025 005-84333
4 Open Document Open Filing PRIMARY DOCUMENT 31 Jan 2025 29 Jan 2025
N-CEN Open Document Open Filing 10 Jan 2025 31 Oct 2024 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT 27 Dec 2024 17 Dec 2024
N-CSR Open Document | Data Open Filing N-CSR 27 Dec 2024 31 Oct 2024 811-21484
NPORT-P Open Document Open Filing 16 Dec 2024 31 Oct 2024 811-21484
SC 13G/A Open Document Open Filing SC 13G/A 14 Nov 2024 005-84333
SCHEDULE 13G/A Open Document Open Filing 12 Nov 2024 005-84333
SC 13G/A Open Document Open Filing 08 Nov 2024 005-84333
4 Open Document Open Filing PRIMARY DOCUMENT 09 Oct 2024 06 Sep 2024
NPORT-P Open Document Open Filing 30 Sep 2024 31 Jul 2024 811-21484
4 Open Document Open Filing 10 Sep 2024 06 Sep 2024
3 Open Document Open Filing 3 10 Sep 2024 09 Sep 2024
SC 13G Open Document Open Filing SC 13G 30 Aug 2024 005-84333
N-PX Open Document Open Filing 30 Aug 2024 30 Jun 2024 811-21484
N-23C-2 Open Document Open Filing N-23C-2 02 Aug 2024 02 Aug 2024 817-00948
NPORT-P Open Document Open Filing 01 Jul 2024 30 Apr 2024 811-21484
N-CSRS Open Document | Data Open Filing N-CSRS 27 Jun 2024 30 Apr 2024 811-21484
40-17G Open Document Open Filing 40-17G 20 Jun 2024 811-21484
8-K Open Document | Data Open Filing FORM 8-K 14 May 2024 14 May 2024 811-21484
DEF 14A Open Document Open Filing DEF 14A 14 May 2024 26 Jun 2024 811-21484
NPORT-P Open Document Open Filing 27 Mar 2024 31 Jan 2024 811-21484
SC 13G/A Open Document Open Filing SC 13G/A 14 Feb 2024 005-84333
SC 13G/A Open Document Open Filing 14 Feb 2024 005-84333
N-CEN Open Document Open Filing 16 Jan 2024 31 Oct 2023 811-21484
N-CSR Open Document | Data Open Filing N-CSR 29 Dec 2023 31 Oct 2023 811-21484
NPORT-P Open Document Open Filing 27 Dec 2023 31 Oct 2023 811-21484
4 Open Document Open Filing PRIMARY DOCUMENT 06 Dec 2023 06 Dec 2023
424B3 Open Document Open Filing 424B3 02 Oct 2023 333-255673
NPORT-P Open Document Open Filing 29 Sep 2023 31 Jul 2023 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT 28 Sep 2023 26 Sep 2023
N-PX Open Document Open Filing BRD8W2_0001275214_2023 28 Aug 2023 30 Jun 2023 811-21484
N-CSRS Open Document | Data Open Filing CERTIFIED SEMI-ANNUAL SHAREHOLDER REPORT 28 Jun 2023 30 Apr 2023 811-21484
NPORT-P Open Document Open Filing 28 Jun 2023 28 Apr 2023 811-21484
DEF 14A Open Document Open Filing DEF 14A 08 May 2023 20 Jun 2023 811-21484
40-17G Open Document Open Filing 40-17G 05 May 2023 811-21484
NPORT-P Open Document Open Filing 31 Mar 2023 31 Jan 2023 811-21484
SC 13G/A Open Document Open Filing AMENDMENT NO. 5 TO SCHEDULE 13G 28 Feb 2023 005-84333
SC 13G/A Open Document Open Filing AMENDMENT NO. 5 TO SCHEDULE 13G 28 Feb 2023 005-84333
SC 13G/A Open Document Open Filing SC 13G/A 16 Feb 2023 005-84333
SC 13G/A Open Document Open Filing 15 Feb 2023 005-84333
SC 13G/A Open Document Open Filing SC 13G/A 14 Feb 2023 005-84333
SC 13G Open Document Open Filing SC 13G 14 Feb 2023 005-84333
SC 13G/A Open Document Open Filing SC 13G/A 14 Feb 2023 005-84333
3 Open Document Open Filing OWNERSHIP DOCUMENT 02 Feb 2023 30 Sep 2022
N-CEN Open Document Open Filing 17 Jan 2023 31 Oct 2022 811-21484
N-CSR Open Document | Data Open Filing ANNUAL SHAREHOLDER REPORT 28 Dec 2022 811-21484
NPORT-P Open Document Open Filing 22 Dec 2022 31 Oct 2022 811-21484
SC 13G Open Document Open Filing 05 Oct 2022 005-84333
424B3 Open Document | Data Open Filing 424B3 03 Oct 2022 333-255673
NPORT-P Open Document Open Filing 29 Sep 2022 31 Jul 2022 811-21484
4 Open Document Open Filing FORM 4 08 Sep 2022 06 Sep 2022
4 Open Document Open Filing PRIMARY DOCUMENT 07 Sep 2022 06 Sep 2022
N-PX Open Document Open Filing BRD8W2_0001275214_2022 22 Aug 2022 30 Jun 2022 811-21484
N-23C-2 Open Document Open Filing N-23C-2 05 Aug 2022 06 Sep 2022 817-00948
NPORT-P Open Document Open Filing 27 Jun 2022 30 Apr 2022 811-21484
N-CSRS Open Document Open Filing CERTIFIED SEMI-ANNUAL SHAREHOLDER REPORT 24 Jun 2022 30 Apr 2022 811-21484
40-17G Open Document Open Filing 40-17G 15 Jun 2022 811-21484
SC 13G/A Open Document Open Filing SC 13G/A 10 Jun 2022 005-84333
SC 13G/A Open Document Open Filing SC 13G/A 10 Jun 2022 005-84333
SC 13G Open Document Open Filing SC 13G 10 Jun 2022 005-84333
SC 13G Open Document Open Filing SC 13G 10 Jun 2022 005-84333
CORRESP Open Document Open Filing 07 Jun 2022
N-CSR/A Open Document Open Filing N-CSR/A 06 Jun 2022 31 Oct 2021 811-21484
3 Open Document Open Filing OWNERSHIP DOCUMENT 02 Jun 2022 24 May 2022
SC 13G Open Document Open Filing SC 13G 02 Jun 2022 005-84333
424B3 Open Document Open Filing 424B3 02 Jun 2022 333-255673
3 Open Document Open Filing FORM 3 SUBMISSION 27 May 2022 24 May 2022
SC 13G Open Document Open Filing SC 13G 27 May 2022 005-84333
4 Open Document Open Filing FORM 4 26 May 2022 24 May 2022
4 Open Document Open Filing FORM 4 26 May 2022 24 Aug 2021
3 Open Document Open Filing FORM 3 26 May 2022 06 Sep 2017
DEF 14A Open Document Open Filing DEF 14A 11 May 2022 28 Jun 2022 811-21484
NPORT-P Open Document Open Filing 25 Mar 2022 31 Jan 2022 811-21484
SC 13G/A Open Document Open Filing AMENDMENT NO. 4 TO SCHEDULE 13G 14 Feb 2022 005-84333
SC 13G/A Open Document Open Filing AMENDMENT NO. 4 TO SCHEDULE 13G 14 Feb 2022 005-84333
SC 13G Open Document Open Filing 14 Feb 2022 005-84333
424B3 Open Document Open Filing 424B3 19 Jan 2022 333-255673
N-CEN Open Document Open Filing 13 Jan 2022 31 Oct 2021 811-21484
424B3 Open Document Open Filing 424B3 03 Jan 2022 333-255673
N-CSR Open Document Open Filing CERTIFIED ANNUAL SHAREHOLDER REPORT 29 Dec 2021 31 Oct 2021 811-21484
NPORT-P Open Document Open Filing 23 Dec 2021 31 Oct 2021 811-21484
3 Open Document Open Filing FORM 3 - 29 Oct 2021 24 Aug 2021
SC 13G Open Document Open Filing SC 13G 29 Oct 2021 005-84333
3 Open Document Open Filing PRIMARY DOCUMENT 20 Oct 2021 24 Aug 2021
SC 13G Open Document Open Filing 20 Oct 2021 005-84333
424B3 Open Document Open Filing 424B3 30 Sep 2021 333-255673
NPORT-P Open Document Open Filing 28 Sep 2021 31 Jul 2021 811-21484
424B3 Open Document Open Filing 424B3 27 Aug 2021 333-255673
N-PX Open Document Open Filing BRD8W2_0001275214_2021 27 Aug 2021 30 Jun 2021 811-21484
8-K Open Document Open Filing FORM 8-K 26 Aug 2021 23 Aug 2021 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT 20 Jul 2021 30 Jun 2021
497 Open Document Open Filing 497 30 Jun 2021 333-255673
NPORT-P Open Document Open Filing 28 Jun 2021 30 Apr 2021 811-21484
N-CSRS Open Document Open Filing CERTIFIED SEMI-ANNUAL SHAREHOLDER REPORT 25 Jun 2021 30 Apr 2021 811-21484
40-17G Open Document Open Filing 40-17G 21 Jun 2021 811-21484
DEF 14A Open Document Open Filing DEF 14A 12 May 2021 29 Jun 2021 811-21484
424B5 Open Document Open Filing 424B5 05 May 2021 333-255673
N-2ASR Open Document Open Filing N-2 30 Apr 2021 811-21484,333-255673
NPORT-P Open Document Open Filing 31 Mar 2021 31 Jan 2021 811-21484
4 Open Document Open Filing PRIMARY DOCUMENT 17 Feb 2021 12 Feb 2021
SC 13G/A Open Document Open Filing AMENDMENT NO. 3 TO SCHEDULE 13G 16 Feb 2021 005-84333
SC 13G/A Open Document Open Filing AMENDMENT NO. 3 TO SCHEDULE 13G 16 Feb 2021 005-84333
N-CEN Open Document Open Filing 12 Jan 2021 31 Oct 2020 811-21484
8-K Open Document Open Filing 8-K 12 Jan 2021 12 Jan 2021 811-21484
N-CSR Open Document Open Filing CERTIFIED ANNUAL SHAREHOLDER REPORT 30 Dec 2020 31 Oct 2020 811-21484
4 Open Document Open Filing PRIMARY DOCUMENT 18 Dec 2020 18 Dec 2020
NPORT-P Open Document Open Filing 18 Dec 2020 31 Oct 2020 811-21484
NPORT-P Open Document Open Filing 29 Sep 2020 31 Jul 2020 811-21484
N-PX Open Document Open Filing BRD8W2_0001275214_2020 27 Aug 2020 30 Jun 2020 811-21484
N-CSRS Open Document Open Filing SEMI-ANNUAL SHAREHOLDER REPORT 01 Jul 2020 30 Apr 2020 811-21484
NPORT-P Open Document Open Filing 26 Jun 2020 30 Apr 2020 811-21484
40-17G Open Document Open Filing 40-17G 26 Jun 2020 811-21484
DEF 14A Open Document Open Filing DEF 14A 14 May 2020 29 Jun 2020 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT 03 Apr 2020 26 Mar 2020
NPORT-P Open Document Open Filing 31 Mar 2020 31 Jan 2020 811-21484
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 13 Feb 2020 005-84333
N-CEN Open Document Open Filing 13 Jan 2020 31 Oct 2019 811-21484
N-CSR Open Document Open Filing CERTIFIED ANNUAL SHAREHOLDER REPORT 27 Dec 2019 31 Oct 2019 811-21484
NPORT-P Open Document Open Filing 27 Dec 2019 31 Oct 2019 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT 20 Dec 2019 16 Dec 2019
3 Open Document Open Filing PRIMARY DOCUMENT 20 Dec 2019 16 Dec 2019
4 Open Document Open Filing PRIMARY DOCUMENT 20 Dec 2019 19 Dec 2019
NPORT-EX Open Document Open Filing CALAMOS STRATEGIC TOTAL RETURN FUND 30 Sep 2019 31 Jul 2019 811-21484
N-PX Open Document Open Filing BRD8W2_0001275214_2019.TXT 28 Aug 2019 30 Jun 2019 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT 22 Aug 2019 15 Aug 2019
N-CSRS Open Document Open Filing SEMI-ANNUAL SHAREHOLDER REPORT 25 Jun 2019 30 Apr 2019 811-21484
DEF 14A Open Document Open Filing DEF 14A 24 May 2019 09 Jul 2019 811-21484
40-17G Open Document Open Filing 40-17G 03 May 2019 811-21484
N-CEN/A Open Document Open Filing 05 Apr 2019 31 Oct 2018 811-21484
N-Q Open Document Open Filing QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS 07 Mar 2019 31 Jan 2019 811-21484
SC 13G/A Open Document Open Filing SCHEDULE 13G/A 13 Feb 2019 005-84333
N-CEN Open Document Open Filing 14 Jan 2019 31 Oct 2018 811-21484
N-CSR Open Document Open Filing CERTIFIED ANNUAL SHAREHOLDER REPORT 24 Dec 2018 31 Oct 2018 811-21484
N-Q Open Document Open Filing QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS 07 Sep 2018 31 Jul 2018 811-21484
40-17G/A Open Document Open Filing 40-17G/A 06 Sep 2018 811-21484
N-PX Open Document Open Filing BRD8W2_0001275214_2018 28 Aug 2018 30 Jun 2018 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT 26 Jul 2018 19 Jul 2018
N-CSRS Open Document Open Filing SEMI-ANNUAL SHAREHOLDER REPORT 21 Jun 2018 30 Apr 2018 811-21484
DEF 14A Open Document Open Filing DEF 14A 14 May 2018 28 Jun 2018 811-21484
40-17G Open Document Open Filing 40-17G 11 May 2018 811-21484
N-Q Open Document Open Filing QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS 08 Mar 2018 31 Jan 2018 811-21484
SC 13G Open Document Open Filing SCHEDULE 13G 14 Feb 2018 005-84333
SC 13G Open Document Open Filing SC 13G 14 Feb 2018 005-84333
SC 13G Open Document Open Filing SC 13G 14 Feb 2018 005-84333
N-CSR/A Open Document Open Filing AMENDMENT TO FORM N-CSR 08 Jan 2018 31 Oct 2017 811-21484
40-17G/A Open Document Open Filing 40-17G/A 03 Jan 2018 811-21484
4 Open Document Open Filing PRIMARY DOCUMENT 03 Jan 2018 02 Jan 2018
N-CSR Open Document Open Filing CERTIFIED ANNUAL SHAREHOLDER REPORT 28 Dec 2017 31 Oct 2017 811-21484
NSAR-B Open Document Open Filing ANSWER FILE 28 Dec 2017 31 Oct 2017 811-21484
SC 13G Open Document Open Filing SC 13G 12 Oct 2017 005-84333
SC 13G Open Document Open Filing SC 13G 15 Sep 2017 005-84333
3 Open Document Open Filing PRIMARY DOCUMENT 15 Sep 2017 06 Sep 2017
N-Q Open Document Open Filing QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS 01 Sep 2017 31 Jul 2017 811-21484
N-PX Open Document Open Filing BRD8W2_0001275214.TXT 28 Aug 2017 30 Jun 2017 811-21484
NSAR-A Open Document Open Filing ANSWER FILE 26 Jun 2017 30 Apr 2017 811-21484
N-CSRS Open Document Open Filing CERTIFIED SEMI-ANNUAL SHAREHOLDER REPORT 23 Jun 2017 30 Apr 2017 811-21484
40-17G Open Document Open Filing 40-17G 31 May 2017 811-21484
DEF 14A Open Document Open Filing DEF 14A 04 May 2017 20 Jun 2017 811-21484
N-Q Open Document Open Filing QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS 03 Mar 2017 31 Jan 2017 811-21484
4 Open Document Open Filing PRIMARY DOCUMENT 25 Jan 2017 23 Jan 2017
NSAR-B Open Document Open Filing ANSWER FILE 29 Dec 2016 31 Oct 2016 811-21484
N-CSR Open Document Open Filing CERTIFIED ANNUAL SHAREHOLDER REPORT 21 Dec 2016 31 Oct 2016 811-21484
CORRESP Open Document Open Filing 27 Oct 2016
NSAR-B/A Open Document Open Filing ANSWER FILE 14 Oct 2016 31 Oct 2015 811-21484
N-Q Open Document Open Filing N-Q 15 Sep 2016 31 Jul 2016 811-21484
N-PX Open Document Open Filing BRD8W2_0001275214_2016.TXT 30 Aug 2016 30 Jun 2016 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT 11 Jul 2016 01 Jul 2016
3 Open Document Open Filing PRIMARY DOCUMENT 11 Jul 2016 01 Jul 2016
NSAR-A Open Document Open Filing ANSWER FILE 24 Jun 2016 30 Apr 2016 811-21484
N-CSRS Open Document | Data Open Filing N-CSRS 21 Jun 2016 30 Apr 2016 811-21484
40-17G Open Document Open Filing 40-17G 17 May 2016 811-21484
DEF 14A Open Document Open Filing DEF 14A 10 May 2016 30 Jun 2016 811-21484
N-Q Open Document | Data Open Filing N-Q 22 Mar 2016 31 Jan 2016 811-21484
4 Open Document Open Filing PRIMARY DOCUMENT 02 Mar 2016 01 Mar 2016
NSAR-B Open Document Open Filing CVXA ANSWERS 10.31.15 29 Dec 2015 31 Oct 2015 811-21484
N-CSR Open Document Open Filing N-CSR 23 Dec 2015 31 Oct 2015 811-21484
N-Q Open Document Open Filing N-Q 21 Sep 2015 31 Jul 2015 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT 01 Sep 2015 01 Sep 2015
3 Open Document Open Filing PRIMARY DOCUMENT 01 Sep 2015 01 Sep 2015
N-PX Open Document Open Filing BRD8W2_00012752142015.TXT 27 Aug 2015 30 Jun 2015 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT 06 Aug 2015 06 Aug 2015
NSAR-A Open Document Open Filing ANSWER FILE 22 Jun 2015 30 Apr 2015 811-21484
N-CSRS Open Document Open Filing N-CSRS 19 Jun 2015 30 Apr 2015 811-21484
DEF 14A Open Document Open Filing DEF 14A 04 Jun 2015 16 Jul 2015 811-21484
40-17G/A Open Document Open Filing 40-17G/A 08 May 2015 811-21484
40-17G Open Document Open Filing 40-17G 22 Apr 2015 811-21484
N-Q Open Document Open Filing N-Q 23 Mar 2015 31 Jan 2015 811-21484
40-17G/A Open Document Open Filing 40-17G/A 04 Feb 2015 811-21484
NSAR-B Open Document Open Filing ANSWER FILE 30 Dec 2014 31 Oct 2014 811-21484
N-CSR Open Document Open Filing N-CSR 24 Dec 2014 31 Oct 2014 811-21484
N-Q Open Document Open Filing N-Q 18 Sep 2014 31 Jul 2014 811-21484
N-PX Open Document Open Filing BRD_8W20001275214.TXT 28 Aug 2014 30 Jun 2014 811-21484
4 Open Document Open Filing PRIMARY DOCUMENT 11 Jul 2014 10 Jul 2014
NSAR-A Open Document Open Filing ANSWER FILE 25 Jun 2014 30 Apr 2014 811-21484
N-CSRS Open Document Open Filing N-CSRS 20 Jun 2014 30 Apr 2014 811-21484
DEF 14A Open Document Open Filing DEF 14A 23 May 2014 25 Jun 2014 811-21484
40-17G Open Document Open Filing 40-17G 16 May 2014 811-21484
N-Q Open Document Open Filing N-Q 24 Mar 2014 31 Jan 2014 811-21484