Form 4: MAIN director DRIP purchases on 09/15 and 09/26/2025

Rhea-AI Filing Summary

Main Street Capital (MAIN) director reported automatic acquisitions of common stock through a dividend reinvestment plan. On 09/15/2025, purchases were 67.463 shares at $66.98, 177.458 shares at $65.17, and 7 shares at $66.87 (indirect by spouse). On 09/26/2025, purchases were 83.746 shares at $63.72 and 214.259 shares at $63.75.

The transactions, coded “J” with a footnote, were pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11. Following the reported transactions, direct beneficial ownership reflected 79,486.8489 shares, and indirect ownership by spouse was 1,958 shares.

Insider Trade Summary

5 transactions reported

Mixed 5 txns

Insider JACKSON JOHN EARL

Role Director

Type	Security	Shares	Price	Value
Other	Common Stock	83.746	$63.72	$5K
Other	Common Stock	214.259	$63.75	$14K
Other	Common Stock	67.463	$66.98	$5K
Other	Common Stock	177.458	$65.17	$12K
Other	Common Stock	7	$66.87	$468.09

Holdings After Transaction: Common Stock — 79,272.59 shares (Direct); Common Stock — 1,958 shares (Indirect, By Wife)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 10/14/2025 - 04:35 PM Learn about SEC filing dates

FAQ

What did MAIN’s insider report on Form 4?

A director reported acquiring common shares via a dividend reinvestment plan on 09/15/2025 and 09/26/2025, with multiple small transactions at stated prices.

What were the share amounts and prices disclosed?

67.463 at $66.98; 177.458 at $65.17; 83.746 at $63.72; 214.259 at $63.75; and 7 shares at $66.87 (indirect by spouse).

What transaction code was used on the Form 4?

Code J, with a footnote stating the acquisitions were under a dividend reinvestment plan.

Were the transactions exempt under SEC rules?

Yes. The filing states they were dividend reinvestment transactions exempt from Section 16 under Rule 16a-11.

How many shares did the reporting person own after these transactions?

Direct beneficial ownership was 79,486.8489 shares after the reported transactions; indirect ownership by spouse was 1,958 shares.

What is the filer’s relationship to Main Street Capital (MAIN)?

The reporting person is a Director of Main Street Capital.

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).

1. Name and Address of Reporting Person^*

JACKSON JOHN EARL

(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)
09/15/2025

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	09/15/2025		J(1)	V	67.463	A	$66.98	79,011.3859	D
Common Stock	09/15/2025		J(1)	V	177.458	A	$65.17	79,188.8439	D
Common Stock	09/26/2025		J(1)	V	83.746	A	$63.72	79,272.5899	D
Common Stock	09/26/2025		J(1)	V	214.259	A	$63.75	79,486.8489	D
Common Stock	09/15/2025		J(1)	V	7	A	$66.87	1,958	I	By Wife

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.

	/s/ Jason B. Beauvais, Attorney-in-Fact	10/14/2025
	** 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.