Calamos Strategic Total Return Fund

Symbol
CSQ on Nasdaq
Entity
Company
Business address
2020 Calamos Court, C/O Calamos Advisors Llc, 60563 Naperville, IL
Phone
6302451046
Fiscal year end
October 31
All SEC filings
View on sec.gov
Get insider transactions for this issuer
Calamos Strategic Total Return Fund has filed 429 SEC EDGAR filings since 1/7/2004

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
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