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
October 31
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Calamos Strategic Total Return Fund has filed 431 SEC EDGAR filings since 1/7/2004

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
SCHEDULE 13G/A Open Document Open Filing Nov 14, 2025 005-84333
NPORT-P Open Document Open Filing Sep 29, 2025 Jul 31, 2025 811-21484
40-17G/A Open Document Open Filing 40-17G/A Sep 16, 2025 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT Sep 12, 2025 Sep 2, 2025
3/A Open Document Open Filing PRIMARY DOCUMENT Sep 9, 2025 Sep 1, 2025
3 Open Document Open Filing PRIMARY DOCUMENT Sep 9, 2025 Sep 1, 2025
3 Open Document Open Filing PRIMARY DOCUMENT Sep 9, 2025 Sep 1, 2025
N-PX Open Document Open Filing Aug 27, 2025 Jun 30, 2025 811-21484
SCHEDULE 13G/A Open Document Open Filing Aug 14, 2025 005-84333
3 Open Document Open Filing PRIMARY DOCUMENT Aug 4, 2025 Jul 29, 2025
N-CSRS Open Document | Data Open Filing N-CSRS Jun 27, 2025 Apr 30, 2025 811-21484
NPORT-P Open Document Open Filing Jun 27, 2025 Apr 30, 2025 811-21484
40-17G Open Document Open Filing 40-17G Jun 26, 2025 811-21484
SCHEDULE 13G/A Open Document Open Filing May 15, 2025 005-84333
DEF 14A Open Document Open Filing DEF 14A May 12, 2025 Jun 23, 2025 811-21484
CORRESP Open Document Open Filing Apr 25, 2025
NPORT-P Open Document Open Filing Mar 25, 2025 Jan 31, 2025 811-21484
40-17G/A Open Document Open Filing 40-17G/A Mar 13, 2025 811-21484
SCHEDULE 13G/A Open Document Open Filing Feb 14, 2025 005-84333
4 Open Document Open Filing PRIMARY DOCUMENT Jan 31, 2025 Jan 29, 2025
N-CEN Open Document Open Filing Jan 10, 2025 Oct 31, 2024 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT Dec 27, 2024 Dec 17, 2024
N-CSR Open Document | Data Open Filing N-CSR Dec 27, 2024 Oct 31, 2024 811-21484
NPORT-P Open Document Open Filing Dec 16, 2024 Oct 31, 2024 811-21484
SC 13G/A Open Document Open Filing SC 13G/A Nov 14, 2024 005-84333
SCHEDULE 13G/A Open Document Open Filing Nov 12, 2024 005-84333
SC 13G/A Open Document Open Filing Nov 8, 2024 005-84333
4 Open Document Open Filing PRIMARY DOCUMENT Oct 9, 2024 Sep 6, 2024
NPORT-P Open Document Open Filing Sep 30, 2024 Jul 31, 2024 811-21484
4 Open Document Open Filing Sep 10, 2024 Sep 6, 2024
3 Open Document Open Filing 3 Sep 10, 2024 Sep 9, 2024
SC 13G Open Document Open Filing SC 13G Aug 30, 2024 005-84333
N-PX Open Document Open Filing Aug 30, 2024 Jun 30, 2024 811-21484
N-23C-2 Open Document Open Filing N-23C-2 Aug 2, 2024 Aug 2, 2024 817-00948
NPORT-P Open Document Open Filing Jul 1, 2024 Apr 30, 2024 811-21484
N-CSRS Open Document | Data Open Filing N-CSRS Jun 27, 2024 Apr 30, 2024 811-21484
40-17G Open Document Open Filing 40-17G Jun 20, 2024 811-21484
8-K Open Document | Data Open Filing FORM 8-K May 14, 2024 May 14, 2024 811-21484
DEF 14A Open Document Open Filing DEF 14A May 14, 2024 Jun 26, 2024 811-21484
NPORT-P Open Document Open Filing Mar 27, 2024 Jan 31, 2024 811-21484
SC 13G/A Open Document Open Filing SC 13G/A Feb 14, 2024 005-84333
SC 13G/A Open Document Open Filing Feb 14, 2024 005-84333
N-CEN Open Document Open Filing Jan 16, 2024 Oct 31, 2023 811-21484
N-CSR Open Document | Data Open Filing N-CSR Dec 29, 2023 Oct 31, 2023 811-21484
NPORT-P Open Document Open Filing Dec 27, 2023 Oct 31, 2023 811-21484
4 Open Document Open Filing PRIMARY DOCUMENT Dec 6, 2023 Dec 6, 2023
424B3 Open Document Open Filing 424B3 Oct 2, 2023 333-255673
NPORT-P Open Document Open Filing Sep 29, 2023 Jul 31, 2023 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT Sep 28, 2023 Sep 26, 2023
N-PX Open Document Open Filing BRD8W2_0001275214_2023 Aug 28, 2023 Jun 30, 2023 811-21484
N-CSRS Open Document | Data Open Filing CERTIFIED SEMI-ANNUAL SHAREHOLDER REPORT Jun 28, 2023 Apr 30, 2023 811-21484
NPORT-P Open Document Open Filing Jun 28, 2023 Apr 28, 2023 811-21484
DEF 14A Open Document Open Filing DEF 14A May 8, 2023 Jun 20, 2023 811-21484
40-17G Open Document Open Filing 40-17G May 5, 2023 811-21484
NPORT-P Open Document Open Filing Mar 31, 2023 Jan 31, 2023 811-21484
SC 13G/A Open Document Open Filing AMENDMENT NO. 5 TO SCHEDULE 13G Feb 28, 2023 005-84333
SC 13G/A Open Document Open Filing AMENDMENT NO. 5 TO SCHEDULE 13G Feb 28, 2023 005-84333
SC 13G/A Open Document Open Filing SC 13G/A Feb 16, 2023 005-84333
SC 13G/A Open Document Open Filing Feb 15, 2023 005-84333
SC 13G/A Open Document Open Filing SC 13G/A Feb 14, 2023 005-84333
SC 13G Open Document Open Filing SC 13G Feb 14, 2023 005-84333
SC 13G/A Open Document Open Filing SC 13G/A Feb 14, 2023 005-84333
3 Open Document Open Filing OWNERSHIP DOCUMENT Feb 2, 2023 Sep 30, 2022
N-CEN Open Document Open Filing Jan 17, 2023 Oct 31, 2022 811-21484
N-CSR Open Document | Data Open Filing ANNUAL SHAREHOLDER REPORT Dec 28, 2022 811-21484
NPORT-P Open Document Open Filing Dec 22, 2022 Oct 31, 2022 811-21484
SC 13G Open Document Open Filing Oct 5, 2022 005-84333
424B3 Open Document | Data Open Filing 424B3 Oct 3, 2022 333-255673
NPORT-P Open Document Open Filing Sep 29, 2022 Jul 31, 2022 811-21484
4 Open Document Open Filing FORM 4 Sep 8, 2022 Sep 6, 2022
4 Open Document Open Filing PRIMARY DOCUMENT Sep 7, 2022 Sep 6, 2022
N-PX Open Document Open Filing BRD8W2_0001275214_2022 Aug 22, 2022 Jun 30, 2022 811-21484
N-23C-2 Open Document Open Filing N-23C-2 Aug 5, 2022 Sep 6, 2022 817-00948
NPORT-P Open Document Open Filing Jun 27, 2022 Apr 30, 2022 811-21484
N-CSRS Open Document Open Filing CERTIFIED SEMI-ANNUAL SHAREHOLDER REPORT Jun 24, 2022 Apr 30, 2022 811-21484
40-17G Open Document Open Filing 40-17G Jun 15, 2022 811-21484
SC 13G/A Open Document Open Filing SC 13G/A Jun 10, 2022 005-84333
SC 13G/A Open Document Open Filing SC 13G/A Jun 10, 2022 005-84333
SC 13G Open Document Open Filing SC 13G Jun 10, 2022 005-84333
SC 13G Open Document Open Filing SC 13G Jun 10, 2022 005-84333
CORRESP Open Document Open Filing Jun 7, 2022
N-CSR/A Open Document Open Filing N-CSR/A Jun 6, 2022 Oct 31, 2021 811-21484
3 Open Document Open Filing OWNERSHIP DOCUMENT Jun 2, 2022 May 24, 2022
SC 13G Open Document Open Filing SC 13G Jun 2, 2022 005-84333
424B3 Open Document Open Filing 424B3 Jun 2, 2022 333-255673
3 Open Document Open Filing FORM 3 SUBMISSION May 27, 2022 May 24, 2022
SC 13G Open Document Open Filing SC 13G May 27, 2022 005-84333
4 Open Document Open Filing FORM 4 May 26, 2022 May 24, 2022
4 Open Document Open Filing FORM 4 May 26, 2022 Aug 24, 2021
3 Open Document Open Filing FORM 3 May 26, 2022 Sep 6, 2017
DEF 14A Open Document Open Filing DEF 14A May 11, 2022 Jun 28, 2022 811-21484
NPORT-P Open Document Open Filing Mar 25, 2022 Jan 31, 2022 811-21484
SC 13G/A Open Document Open Filing AMENDMENT NO. 4 TO SCHEDULE 13G Feb 14, 2022 005-84333
SC 13G/A Open Document Open Filing AMENDMENT NO. 4 TO SCHEDULE 13G Feb 14, 2022 005-84333
SC 13G Open Document Open Filing Feb 14, 2022 005-84333
424B3 Open Document Open Filing 424B3 Jan 19, 2022 333-255673
N-CEN Open Document Open Filing Jan 13, 2022 Oct 31, 2021 811-21484
424B3 Open Document Open Filing 424B3 Jan 3, 2022 333-255673
N-CSR Open Document Open Filing CERTIFIED ANNUAL SHAREHOLDER REPORT Dec 29, 2021 Oct 31, 2021 811-21484
NPORT-P Open Document Open Filing Dec 23, 2021 Oct 31, 2021 811-21484
3 Open Document Open Filing FORM 3 - Oct 29, 2021 Aug 24, 2021
SC 13G Open Document Open Filing SC 13G Oct 29, 2021 005-84333
3 Open Document Open Filing PRIMARY DOCUMENT Oct 20, 2021 Aug 24, 2021
SC 13G Open Document Open Filing Oct 20, 2021 005-84333
424B3 Open Document Open Filing 424B3 Sep 30, 2021 333-255673
NPORT-P Open Document Open Filing Sep 28, 2021 Jul 31, 2021 811-21484
424B3 Open Document Open Filing 424B3 Aug 27, 2021 333-255673
N-PX Open Document Open Filing BRD8W2_0001275214_2021 Aug 27, 2021 Jun 30, 2021 811-21484
8-K Open Document Open Filing FORM 8-K Aug 26, 2021 Aug 23, 2021 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT Jul 20, 2021 Jun 30, 2021
497 Open Document Open Filing 497 Jun 30, 2021 333-255673
NPORT-P Open Document Open Filing Jun 28, 2021 Apr 30, 2021 811-21484
N-CSRS Open Document Open Filing CERTIFIED SEMI-ANNUAL SHAREHOLDER REPORT Jun 25, 2021 Apr 30, 2021 811-21484
40-17G Open Document Open Filing 40-17G Jun 21, 2021 811-21484
DEF 14A Open Document Open Filing DEF 14A May 12, 2021 Jun 29, 2021 811-21484
424B5 Open Document Open Filing 424B5 May 5, 2021 333-255673
N-2ASR Open Document Open Filing N-2 Apr 30, 2021 811-21484,333-255673
NPORT-P Open Document Open Filing Mar 31, 2021 Jan 31, 2021 811-21484
4 Open Document Open Filing PRIMARY DOCUMENT Feb 17, 2021 Feb 12, 2021
SC 13G/A Open Document Open Filing AMENDMENT NO. 3 TO SCHEDULE 13G Feb 16, 2021 005-84333
SC 13G/A Open Document Open Filing AMENDMENT NO. 3 TO SCHEDULE 13G Feb 16, 2021 005-84333
N-CEN Open Document Open Filing Jan 12, 2021 Oct 31, 2020 811-21484
8-K Open Document Open Filing 8-K Jan 12, 2021 Jan 12, 2021 811-21484
N-CSR Open Document Open Filing CERTIFIED ANNUAL SHAREHOLDER REPORT Dec 30, 2020 Oct 31, 2020 811-21484
4 Open Document Open Filing PRIMARY DOCUMENT Dec 18, 2020 Dec 18, 2020
NPORT-P Open Document Open Filing Dec 18, 2020 Oct 31, 2020 811-21484
NPORT-P Open Document Open Filing Sep 29, 2020 Jul 31, 2020 811-21484
N-PX Open Document Open Filing BRD8W2_0001275214_2020 Aug 27, 2020 Jun 30, 2020 811-21484
N-CSRS Open Document Open Filing SEMI-ANNUAL SHAREHOLDER REPORT Jul 1, 2020 Apr 30, 2020 811-21484
NPORT-P Open Document Open Filing Jun 26, 2020 Apr 30, 2020 811-21484
40-17G Open Document Open Filing 40-17G Jun 26, 2020 811-21484
DEF 14A Open Document Open Filing DEF 14A May 14, 2020 Jun 29, 2020 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT Apr 3, 2020 Mar 26, 2020
NPORT-P Open Document Open Filing Mar 31, 2020 Jan 31, 2020 811-21484
SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 13, 2020 005-84333
N-CEN Open Document Open Filing Jan 13, 2020 Oct 31, 2019 811-21484
N-CSR Open Document Open Filing CERTIFIED ANNUAL SHAREHOLDER REPORT Dec 27, 2019 Oct 31, 2019 811-21484
NPORT-P Open Document Open Filing Dec 27, 2019 Oct 31, 2019 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT Dec 20, 2019 Dec 16, 2019
3 Open Document Open Filing PRIMARY DOCUMENT Dec 20, 2019 Dec 16, 2019
4 Open Document Open Filing PRIMARY DOCUMENT Dec 20, 2019 Dec 19, 2019
NPORT-EX Open Document Open Filing CALAMOS STRATEGIC TOTAL RETURN FUND Sep 30, 2019 Jul 31, 2019 811-21484
N-PX Open Document Open Filing BRD8W2_0001275214_2019.TXT Aug 28, 2019 Jun 30, 2019 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT Aug 22, 2019 Aug 15, 2019
N-CSRS Open Document Open Filing SEMI-ANNUAL SHAREHOLDER REPORT Jun 25, 2019 Apr 30, 2019 811-21484
DEF 14A Open Document Open Filing DEF 14A May 24, 2019 Jul 9, 2019 811-21484
40-17G Open Document Open Filing 40-17G May 3, 2019 811-21484
N-CEN/A Open Document Open Filing Apr 5, 2019 Oct 31, 2018 811-21484
N-Q Open Document Open Filing QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS Mar 7, 2019 Jan 31, 2019 811-21484
SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 13, 2019 005-84333
N-CEN Open Document Open Filing Jan 14, 2019 Oct 31, 2018 811-21484
N-CSR Open Document Open Filing CERTIFIED ANNUAL SHAREHOLDER REPORT Dec 24, 2018 Oct 31, 2018 811-21484
N-Q Open Document Open Filing QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS Sep 7, 2018 Jul 31, 2018 811-21484
40-17G/A Open Document Open Filing 40-17G/A Sep 6, 2018 811-21484
N-PX Open Document Open Filing BRD8W2_0001275214_2018 Aug 28, 2018 Jun 30, 2018 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT Jul 26, 2018 Jul 19, 2018
N-CSRS Open Document Open Filing SEMI-ANNUAL SHAREHOLDER REPORT Jun 21, 2018 Apr 30, 2018 811-21484
DEF 14A Open Document Open Filing DEF 14A May 14, 2018 Jun 28, 2018 811-21484
40-17G Open Document Open Filing 40-17G May 11, 2018 811-21484
N-Q Open Document Open Filing QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS Mar 8, 2018 Jan 31, 2018 811-21484
SC 13G Open Document Open Filing SCHEDULE 13G Feb 14, 2018 005-84333
SC 13G Open Document Open Filing SC 13G Feb 14, 2018 005-84333
SC 13G Open Document Open Filing SC 13G Feb 14, 2018 005-84333
N-CSR/A Open Document Open Filing AMENDMENT TO FORM N-CSR Jan 8, 2018 Oct 31, 2017 811-21484
40-17G/A Open Document Open Filing 40-17G/A Jan 3, 2018 811-21484
4 Open Document Open Filing PRIMARY DOCUMENT Jan 3, 2018 Jan 2, 2018
N-CSR Open Document Open Filing CERTIFIED ANNUAL SHAREHOLDER REPORT Dec 28, 2017 Oct 31, 2017 811-21484
NSAR-B Open Document Open Filing ANSWER FILE Dec 28, 2017 Oct 31, 2017 811-21484
SC 13G Open Document Open Filing SC 13G Oct 12, 2017 005-84333
SC 13G Open Document Open Filing SC 13G Sep 15, 2017 005-84333
3 Open Document Open Filing PRIMARY DOCUMENT Sep 15, 2017 Sep 6, 2017
N-Q Open Document Open Filing QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS Sep 1, 2017 Jul 31, 2017 811-21484
N-PX Open Document Open Filing BRD8W2_0001275214.TXT Aug 28, 2017 Jun 30, 2017 811-21484
NSAR-A Open Document Open Filing ANSWER FILE Jun 26, 2017 Apr 30, 2017 811-21484
N-CSRS Open Document Open Filing CERTIFIED SEMI-ANNUAL SHAREHOLDER REPORT Jun 23, 2017 Apr 30, 2017 811-21484
40-17G Open Document Open Filing 40-17G May 31, 2017 811-21484
DEF 14A Open Document Open Filing DEF 14A May 4, 2017 Jun 20, 2017 811-21484
N-Q Open Document Open Filing QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS Mar 3, 2017 Jan 31, 2017 811-21484
4 Open Document Open Filing PRIMARY DOCUMENT Jan 25, 2017 Jan 23, 2017
NSAR-B Open Document Open Filing ANSWER FILE Dec 29, 2016 Oct 31, 2016 811-21484
N-CSR Open Document Open Filing CERTIFIED ANNUAL SHAREHOLDER REPORT Dec 21, 2016 Oct 31, 2016 811-21484
CORRESP Open Document Open Filing Oct 27, 2016
NSAR-B/A Open Document Open Filing ANSWER FILE Oct 14, 2016 Oct 31, 2015 811-21484
N-Q Open Document Open Filing N-Q Sep 15, 2016 Jul 31, 2016 811-21484
N-PX Open Document Open Filing BRD8W2_0001275214_2016.TXT Aug 30, 2016 Jun 30, 2016 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT Jul 11, 2016 Jul 1, 2016
3 Open Document Open Filing PRIMARY DOCUMENT Jul 11, 2016 Jul 1, 2016
NSAR-A Open Document Open Filing ANSWER FILE Jun 24, 2016 Apr 30, 2016 811-21484
N-CSRS Open Document | Data Open Filing N-CSRS Jun 21, 2016 Apr 30, 2016 811-21484
40-17G Open Document Open Filing 40-17G May 17, 2016 811-21484
DEF 14A Open Document Open Filing DEF 14A May 10, 2016 Jun 30, 2016 811-21484
N-Q Open Document | Data Open Filing N-Q Mar 22, 2016 Jan 31, 2016 811-21484
4 Open Document Open Filing PRIMARY DOCUMENT Mar 2, 2016 Mar 1, 2016
NSAR-B Open Document Open Filing CVXA ANSWERS 10.31.15 Dec 29, 2015 Oct 31, 2015 811-21484
N-CSR Open Document Open Filing N-CSR Dec 23, 2015 Oct 31, 2015 811-21484
N-Q Open Document Open Filing N-Q Sep 21, 2015 Jul 31, 2015 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT Sep 1, 2015 Sep 1, 2015
3 Open Document Open Filing PRIMARY DOCUMENT Sep 1, 2015 Sep 1, 2015
N-PX Open Document Open Filing BRD8W2_00012752142015.TXT Aug 27, 2015 Jun 30, 2015 811-21484
3 Open Document Open Filing PRIMARY DOCUMENT Aug 6, 2015 Aug 6, 2015
NSAR-A Open Document Open Filing ANSWER FILE Jun 22, 2015 Apr 30, 2015 811-21484
N-CSRS Open Document Open Filing N-CSRS Jun 19, 2015 Apr 30, 2015 811-21484
DEF 14A Open Document Open Filing DEF 14A Jun 4, 2015 Jul 16, 2015 811-21484
40-17G/A Open Document Open Filing 40-17G/A May 8, 2015 811-21484
40-17G Open Document Open Filing 40-17G Apr 22, 2015 811-21484
N-Q Open Document Open Filing N-Q Mar 23, 2015 Jan 31, 2015 811-21484
40-17G/A Open Document Open Filing 40-17G/A Feb 4, 2015 811-21484
NSAR-B Open Document Open Filing ANSWER FILE Dec 30, 2014 Oct 31, 2014 811-21484
N-CSR Open Document Open Filing N-CSR Dec 24, 2014 Oct 31, 2014 811-21484
N-Q Open Document Open Filing N-Q Sep 18, 2014 Jul 31, 2014 811-21484
N-PX Open Document Open Filing BRD_8W20001275214.TXT Aug 28, 2014 Jun 30, 2014 811-21484
4 Open Document Open Filing PRIMARY DOCUMENT Jul 11, 2014 Jul 10, 2014
NSAR-A Open Document Open Filing ANSWER FILE Jun 25, 2014 Apr 30, 2014 811-21484
N-CSRS Open Document Open Filing N-CSRS Jun 20, 2014 Apr 30, 2014 811-21484
DEF 14A Open Document Open Filing DEF 14A May 23, 2014 Jun 25, 2014 811-21484
40-17G Open Document Open Filing 40-17G May 16, 2014 811-21484
N-Q Open Document Open Filing N-Q Mar 24, 2014 Jan 31, 2014 811-21484