[Form 4] Main Street Capital Corporation Insider Trading Activity

Rhea-AI Filing Summary

Vincent D. Foster, a director of Main Street Capital Corporation (MAIN), reported purchases of the issuer's common stock on 07/15/2025 through a dividend reinvestment plan. The Form 4 lists two non-derivative acquisition entries at a price of $63.57 per share (fractional amounts 10.7046 and 1,540.83), and shows total direct beneficial ownership following the transactions of 1,725,536.9384 shares. The filing also discloses indirect holdings in family trusts (MS Trust I, II, III and V) totaling reported fractional amounts. The reporting person notes the shares were acquired under a dividend reinvestment transaction exempt under Rule 16a-11. The form was signed by an attorney-in-fact on 08/14/2025.

Positive

• Director increased direct ownership to 1,725,536.9384 shares following the reinvestment transactions
• Transactions were disclosed as a dividend reinvestment exempt under Rule 16a-11, indicating automated reinvestment rather than undisclosed trading

Negative

• None.

Insights

Financial Analyst

TL;DR: Routine dividend reinvestment increased a director's direct stake to ~1.73M shares; no sale or unusual derivative activity reported.

The filing records small fractional share purchases through a dividend reinvestment plan at $63.57 per share, consistent with automated reinvestment rather than a discretionary open-market buy. The reported direct beneficial ownership after the transactions is 1,725,536.9384 shares, with additional indirect holdings via family trusts. This disclosure is informational and does not indicate liquidation or material change to the director's position.

Corporate Governance Expert

TL;DR: Disclosure meets Section 16 reporting norms; acquisitions are Rule 16a-11 exempt dividend reinvestments, signed by an attorney-in-fact.

The Form 4 clearly identifies the reporting person as a director and specifies the acquisition method as a dividend reinvestment transaction exempt from Section 16. Indirect ownership through family trusts is disclosed by name. The signature by an attorney-in-fact is properly presented. From a governance and compliance perspective, the filing appears complete and routine.

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

FOSTER VINCENT D

(Last) (First) (Middle)

1300 POST OAK BLVD

8TH FLOOR

(Street)

HOUSTON TX 77056

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Main Street Capital CORP [ MAIN ]

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

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
07/15/2025

4. 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 Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	07/15/2025		J(1)	V	10.7046	A	$63.57	1,723,996.1084	D
Common Stock	07/15/2025		J(1)	V	1,540.83	A	$63.57	1,725,536.9384	D
Common Stock								35,307.4742	I	MS Trust I(2)
Common Stock								34,557	I	MS Trust II(2)
Common Stock								34,557	I	MS Trust III(2)
Common Stock								33,300	I	MS Trust V(2)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The reporting person acquired these shares under a dividend reinvestment plan, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11.

2. Family trust

	/s/ Jason B. Beauvais, Attorney-in-Fact	08/14/2025
	** 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 4 (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 transactions did Vincent D. Foster report on the MAIN Form 4?

He reported acquisitions of common stock on 07/15/2025 via a dividend reinvestment plan, at $63.57 per share (fractional amounts 10.7046 and 1,540.83).

How many MAIN shares does the reporting person beneficially own after the reported transactions?

Direct beneficial ownership following the reported transactions is 1,725,536.9384 shares according to the filing.

Were the purchases ordinary open-market trades or part of a plan?

The filing states the shares were acquired under a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11.

Does the Form 4 disclose any indirect ownership for Vincent D. Foster?

Yes. The filing lists indirect beneficial ownership through family trusts (MS Trust I, II, III and V) with reported fractional amounts.

Who signed the Form 4 and when?

The form was signed by Jason B. Beauvais, attorney-in-fact, on 08/14/2025.