[Form 3] Calamos Strategic Total Return Fund Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

John S. Koudounis filed an amended Form 3 reporting initial beneficial ownership in Calamos Strategic Total Return Fund (CSQ). The filing shows 15,830 shares of common stock held directly. The amendment updates his relationship with the issuer to reflect that he is an officer (Vice President) and became a trustee effective 09/01/2025. The form is signed and dated 09/09/2025 and contains no derivative holdings or other transactions.

Positive

• Direct ownership of 15,830 common shares is disclosed, increasing transparency of insider holdings.
• Reporting relationship updated to show Vice President and Trustee effective 09/01/2025, clarifying governance roles.

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Routine insider ownership disclosure showing a trustee appointment and direct holdings of 15,830 shares; no derivatives disclosed.

The filing is a standard Section 16 initial/amended disclosure updating the reporting person's role to include Trustee effective 09/01/2025. Such updates improve transparency about management and board composition. The disclosable stake is 15,830 shares held directly; there are no derivative securities reported. From a governance perspective, the document documents alignment of a named officer/trustee with the fund but does not by itself indicate any change in control or material financial impact.

Securities Analyst

TL;DR: Administrative Form 3 amendment noting direct ownership of 15,830 common shares and role change; no market-moving financial data.

This disclosure meets Section 16 reporting requirements by showing beneficial ownership and clarifying the reporting person's relationship to the issuer. The absence of derivative positions and the limited share count suggest this is a routine compliance filing rather than an event likely to affect valuation or liquidity. Investors receive clearer insider ownership records but no new performance or transaction information.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Koudounis John S.

(Last) (First) (Middle)

2020 CALAMOS COURT

(Street)

NAPERVILLE IL 60563

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
09/01/2025

3. Issuer Name and Ticker or Trading Symbol
CALAMOS STRATEGIC TOTAL RETURN FUND [ CSQ ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)	X	Other (specify below)
	Vice President		Trustee effective 9-1-25

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	15,830	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

The reporting person has filed this amended Form 3 to update his relationship to the issuer.

	s/ John S. Koudounis	09/09/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did the Form 3 filed for CSQ disclose about John S. Koudounis's holdings?

The filing reports direct ownership of 15,830 shares of common stock.

Did the Form 3 indicate any derivative securities for CSQ by the reporting person?

No derivative securities were reported; Table II lists none.

What change in relationship to the issuer was reported on this Form 3 for CSQ?

The filing updates the reporting person as an officer (Vice President) and a Trustee effective 09/01/2025.

When was the Form 3 signed for the CSQ filing?

The reporting person signed the amended Form 3 on 09/09/2025.

Is this Form 3 an initial filing or an amendment for CSQ?

It is an amended Form 3 filed to update the reporting person's relationship to the issuer.