Director boosts Main Street Capital (MAIN) share stake via DRIP

Rhea-AI Filing Summary

Main Street Capital director Jon Kevin Griffin reported small automatic share purchases through the company’s dividend reinvestment plan. On December 15, 2025, he acquired 17.427 and 198.723 shares of common stock at prices of $62.05 and $60.77 per share. On December 29, 2025, he acquired 21.02 and 238.781 additional shares at $60.77 and $59.75 per share. All transactions are coded “J” and were made under a dividend reinvestment plan exempt from Section 16 under Rule 16a-11. Following these transactions, he directly owned 70,388.489 shares of Main Street Capital common stock.

Insider Trade Summary

4 transactions reported

Mixed 4 txns

Insider Griffin Jon Kevin

Role Director

Type	Security	Shares	Price	Value
Other	Common Stock	21.02	$60.77	$1K
Other	Common Stock	238.781	$59.75	$14K
Other	Common Stock	17.427	$62.05	$1K
Other	Common Stock	198.723	$60.77	$12K

Holdings After Transaction: Common Stock — 70,149.708 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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^*

Griffin Jon Kevin

(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)
12/15/2025

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	12/15/2025		J(1)	V	17.427	A	$62.05	69,929.965	D
Common Stock	12/15/2025		J(1)	V	198.723	A	$60.77	70,128.688	D
Common Stock	12/29/2025		J(1)	V	21.02	A	$60.77	70,149.708	D
Common Stock	12/29/2025		J(1)	V	238.781	A	$59.75	70,388.489	D

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	01/13/2026
	** 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

Who is the insider in Main Street Capital (MAIN)'s latest Form 4?

The insider is Jon Kevin Griffin, who serves as a director of Main Street Capital.

What type of transactions did Jon Kevin Griffin report for MAIN?

He reported acquisitions of common stock coded as Transaction Code J, reflecting shares acquired under a dividend reinvestment plan.

How many Main Street Capital shares did the director acquire on December 15, 2025?

On December 15, 2025, he acquired 17.427 shares at $62.05 and 198.723 shares at $60.77 per share through the dividend reinvestment plan.

What transactions did the Main Street Capital director make on December 29, 2025?

On December 29, 2025, he acquired 21.02 shares at $60.77 and 238.781 shares at $59.75 per share, also via the dividend reinvestment plan.

How many Main Street Capital (MAIN) shares does Jon Kevin Griffin own after these transactions?

After the reported transactions, he beneficially owned 70,388.489 shares of Main Street Capital common stock in direct ownership.

Were the Main Street Capital insider transactions part of a dividend reinvestment plan?

Yes. A footnote states that the reporting person acquired these shares under a dividend reinvestment plan, in a transaction exempt from Section 16 under Rule 16a-11.