Calamos Dynamic Convertible and income Fund

Supplement dated June 30, 2021 to the

Statement of Additional Information,

dated May 27, 2021

Effective immediately, Daniel Dufresne is added as Vice President of Calamos Dynamic Convertible and Income Fund. The section titled “Management—Officers” in the Statement of Additional Information is hereby amended to include the following information about the new officer:

Name and Year of Birth	Position(s) with Trust	Principal Occupation(s)
Daniel Dufresne (1974)	Vice President (since June 30, 2021)	Executive Vice President and Chief Operating Officer, CAM, CILLC, Calamos Advisors, and CWM (since April 2021); prior thereto Citadel (1999-2020); Partner (2008-2020); Managing Director, Global Treasurer (2008-2020); Global Head of Operations (2011-2020); Global Head of Counterparty Strategy (2018-2020); Senior Advisor to the COO (2020); CEO, Citadel Clearing LLC (2015-2020).

Effective immediately, the third paragraph on page S-39 of the Statement of Additional Information shall be deleted and replaced with the following:

Calamos Advisors is a wholly owned subsidiary of Calamos Investments LLC (“CILLC”). Calamos Asset Management, Inc. (“CAM”) is the sole manager of CILLC. As of April 30, 2021, approximately 22% of the outstanding interests of CILLC was owned by CAM and the remaining approximately 78% of CILLC was owned by Calamos Partners LLC (“CPL”) and John P. Calamos, Sr. CAM was owned by John P. Calamos, Sr. and John S. Koudounis, and CPL was owned by John S. Koudounis and Calamos Family Partners, Inc. (“CFP”). CFP was beneficially owned by members of the Calamos family, including John P. Calamos, Sr. In addition, Mr. Koudounis has the option to purchase a controlling interest in CPL upon the death or permanent disability of John P. Calamos, Sr., provided Mr. Koudounis is then serving as Chief Executive Officer of CAM and CILLC. John P. Calamos, Sr., is an affiliated person of the Funds and Calamos Advisors by virtue of his position as Chairman, Trustee and President of the Trust and Chairman and Global Chief Investment Officer (“Global CIO”) of Calamos Advisors. John S. Koudounis, Robert F. Behan, Thomas E. Herman, J. Christopher Jackson, Stephen Atkins, and Daniel Dufresne are affiliated persons of the Funds and Calamos Advisors by virtue of their positions as Vice President; Vice President; Vice President and Chief Financial Officer; Vice President and Secretary; Treasurer; and Vice President of the Trust; respectively, and as President and Chief Executive Officer; Executive Vice President and Chief Distribution Officer; Executive Vice President and Chief Financial Officer; Senior Vice President, General Counsel and Secretary; Senior Vice President and Head of Fund Administration; and Executive Vice President and Chief Operating Officer of Calamos Advisors, respectively.

Please retain this supplement for future reference.

CCDSPT 06/21