Main Street Capital (NYSE: MAIN) director adds shares via dividend plan

Rhea-AI Filing Summary

Main Street Capital director Vincent D. Foster reported automatic purchases of company common stock through a dividend reinvestment plan. On December 15, 2025, he acquired 11.244 and 1,200.4 shares at $62.05 per share, bringing his directly held stake at that time to 1,733,243.9294 shares. On December 29, 2025, he acquired an additional 13.562 and 1,447.91 shares at $60.77 per share, increasing his direct holdings to 1,734,705.4014 shares.

The filing also lists indirect beneficial ownership through family trusts, including 35,307.4742 shares in MS Trust I and additional blocks of 34,557 shares in MS Trust II and III and 33,300 shares in MS Trust V. The transactions are coded "J" and are described as purchases under a dividend reinvestment plan that is exempt from Section 16 under Rule 16a-11.

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)
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	11.244	A	$62.05	1,732,043.5294	D
Common Stock	12/15/2025		J(1)	V	1,200.4	A	$62.05	1,733,243.9294	D
Common Stock	12/29/2025		J(1)	V	13.562	A	$60.77	1,733,257.4914	D
Common Stock	12/29/2025		J(1)	V	1,447.91	A	$60.77	1,734,705.4014	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	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

What insider activity did MAIN director Vincent D. Foster report?

The director reported acquiring Main Street Capital (MAIN) common stock through a dividend reinvestment plan, with several small automatic share purchases in December 2025 at prices between $60.77 and $62.05 per share.

How many Main Street Capital shares does the director hold directly after these transactions?

After the reported dividend reinvestment transactions, Vincent D. Foster directly beneficially owned 1,734,705.4014 shares of Main Street Capital common stock.

On what dates did the MAIN insider dividend reinvestment purchases occur?

The dividend reinvestment purchases of Main Street Capital (MAIN) common stock occurred on December 15, 2025 and December 29, 2025.

What prices were paid for the Main Street Capital shares under the dividend reinvestment plan?

The reported prices for the dividend reinvestment purchases were $62.05 per share on December 15, 2025 and $60.77 per share on December 29, 2025.

Does the MAIN director have indirect holdings through family trusts?

Yes. The filing shows indirect beneficial ownership of Main Street Capital common stock through family trusts, including 35,307.4742 shares in MS Trust I, 34,557 shares in MS Trust II, 34,557 shares in MS Trust III, and 33,300 shares in MS Trust V.

What does the Form 4 say about the nature of these MAIN share acquisitions?

The Form 4 states that the reporting person acquired these Main Street Capital shares under a dividend reinvestment plan, in a transaction exempt from Section 16 under Rule 16a-11.