[Form 4] Main Street Capital Corporation Insider Trading Activity

Rhea-AI Filing Summary

Insider purchases via dividend reinvestment increased holdings of Main Street Capital (MAIN). Director Vincent D. Foster acquired shares on 08/15/2025 under a dividend reinvestment plan reported as exempt under Rule 16a-11. Two non-derivative purchases are listed at a reported price of $67.15: an entry showing 10.1745 shares and another showing 1,464.53 shares. After these transactions, the filing reports Mr. Foster's direct beneficial ownership as 1,727,011.6429 shares and earlier as 1,725,547.1129 shares. The filing also discloses indirect beneficial holdings through family trusts totaling 137,721.4742 shares (sum of trust amounts shown). The Form 4 was signed by an attorney-in-fact on 09/02/2025.

Positive

• Transactions reported as exempt under Rule 16a-11, indicating dividend reinvestment plan compliance
• Clear disclosure of direct and indirect ownership including precise share amounts after the transactions

Negative

• None.

Insights

Securities Analyst

TL;DR: Small insider acquisitions via dividend reinvestment modestly increased the director's direct share count; transactions are routine and Rule 16a-11 exempt.

The filing shows two dividend reinvestment purchases on 08/15/2025 recorded with transaction code J and identified as exempt under Rule 16a-11. Reported per-share price is $67.15. Post-transaction direct beneficial ownership is reported as 1,727,011.6429 shares. Indirect holdings via family trusts are disclosed separately. These are customary insider activity items rather than material corporate events.

Corporate Governance Expert

TL;DR: Disclosure is consistent with Section 16 reporting: director reported purchases and listed indirect trust holdings; signature by attorney-in-fact included.

The Form 4 identifies the reporting person as a director and specifies individual filing. Purchases were recorded under a dividend reinvestment plan and the filer included detailed direct and indirect beneficial ownership amounts. The form includes an explanation that trusts are family trusts and carries an attorney-in-fact signature dated 09/02/2025. Documentation appears to follow required disclosure conventions for insider transactions.

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
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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)
08/15/2025

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	08/15/2025		J(1)	V	10.1745	A	$67.15	1,725,547.1129	D
Common Stock	08/15/2025		J(1)	V	1,464.53	A	$67.15	1,727,011.6429	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	09/02/2025
	** 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 MAIN director Vincent D. Foster report on Form 4?

The filing reports two non-derivative acquisitions on 08/15/2025 under a dividend reinvestment plan (transaction code J) at a reported price of $67.15.

How many Main Street Capital shares does Vincent D. Foster beneficially own after the reported transactions?

The filing reports direct beneficial ownership of 1,727,011.6429 shares following the reported transactions.

Does the Form 4 disclose indirect holdings for Vincent D. Foster (MAIN)?

Yes. The filing lists indirect holdings through family trusts: 35,307.4742, 34,557, 34,557, and 33,300 shares respectively.

When were the transactions executed and when was the Form 4 signed?

Transactions are dated 08/15/2025 and the form bears a signature by an attorney-in-fact dated 09/02/2025.

What does transaction code J mean on this Form 4 for MAIN?

The filing explains the acquisitions were made under a dividend reinvestment plan and were reported as exempt under Rule 16a-11.