[Form 4] Main Street Capital Corporation Insider Trading Activity

Rhea-AI Filing Summary

Lane Brian E., a director of Main Street Capital Corporation (MAIN), acquired additional common stock on 08/15/2025 through the company's dividend reinvestment plan. Two non-derivative purchases were reported: 48.716 shares at $67.15 and 131.696 shares at $66.10, bringing his total beneficial ownership to 47,702.6648 shares after the transactions. The filing notes these reinvestment transactions are exempt from Section 16 under Rule 16a-11.

Positive

• Director participation in dividend reinvestment plan shows continued insider ownership
• Transparent disclosure of share amounts and prices for each reinvestment transaction
• Total beneficial ownership increased to 47,702.6648 shares following the transactions

Negative

• None.

Insights

Financial Analyst

TL;DR: Director increased stake modestly via dividend reinvestment, indicating retention of economic exposure without open-market purchases.

The reported transactions show a director participating in the issuer's dividend reinvestment plan rather than purchasing shares on the open market. The two reinvestments, at $67.15 and $66.10 per share, added a combined 180.412 shares and increased beneficial ownership to 47,702.6648 shares. For investors, this is a neutral-to-slightly-positive signal that management is retaining equity through dividends, but the transactions are small relative to the total outstanding shares and are exempt under Rule 16a-11.

Corporate Governance Expert

TL;DR: Routine insider reinvestment; complies with Rule 16a-11 affirmative defense for planned reinvestments.

The filing explicitly states these shares were acquired under the company's dividend reinvestment plan and are exempt from Section 16 reporting under Rule 16a-11. This indicates the transactions follow established company procedures and do not reflect opportunistic trading. From a governance perspective, the disclosure is standard, documents continued insider ownership, and raises no immediate compliance concerns based on the information provided.

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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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^*

Lane Brian E.

(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	48.716	A	$67.15	47,570.9688	D
Common Stock	08/15/2025		J(1)	V	131.696	A	$66.1	47,702.6648	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	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 did Lane Brian E. acquire in the Form 4 for MAIN?

He acquired common stock via the dividend reinvestment plan: 48.716 shares at $67.15 and 131.696 shares at $66.10 on 08/15/2025.

How many Main Street Capital (MAIN) shares does Lane beneficially own after these transactions?

Following the reported transactions, Lane beneficially owns 47,702.6648 shares.

Were these insider purchases made on the open market or through another mechanism?

The filing states the shares were acquired under the company's dividend reinvestment plan, not via open-market purchases.

Does the Form 4 indicate any exemption or special rule for these transactions?

Yes. The transactions are noted as exempt from Section 16 under Rule 16a-11, reflecting dividend reinvestment treatment.

What prices were paid for the reinvested shares reported on the Form 4?

The reinvested shares were reported at $67.15 and $66.10 per share.