[Form 4] Main Street Capital Corporation Insider Trading Activity

Rhea-AI Filing Summary

Main Street Capital director John Earl Jackson made small, routine purchases of Main Street Capital common stock through a dividend reinvestment plan on 07/15/2025. The filings show three non-derivative acquisitions: 70.529 shares at $63.57, 180.699 shares at $63.50 and 7 shares at $63.55. After the transactions, the reporting person directly beneficially owned 78,702.5969 shares and indirectly owned 1,944 shares through his wife. The Form 4 notes these purchases were made under a dividend reinvestment plan and are exempt from Section 16 reporting under Rule 16a-11.

Positive

• Director increased direct ownership to 78,702.5969 shares through dividend reinvestment purchases
• Transactions executed under a DRIP and noted as exempt under Rule 16a-11, indicating routine, compliant insider activity

Negative

• None.

Insights

Financial Analyst

TL;DR: Director made small, routine DRIP purchases; no material change to ownership or control.

The transactions are modest in size (totaling 258.228 shares acquired at roughly $63.50 each) and reflect automatic reinvestment of dividends rather than an active, opportunistic purchase. Direct beneficial ownership rose to 78,702.5969 shares, which is not a material shift for a public company of Main Street Capital's size. Because the acquisitions were executed under a dividend reinvestment plan and exempted under Rule 16a-11, they present routine insider activity with limited immediate market or governance implications.

Corporate Governance Expert

TL;DR: Disclosure is standard and compliant; transactions were routine and properly categorized under Rule 16a-11.

The Form 4 provides clear disclosure of small-scale share additions by a director and includes an explanatory note that the shares were acquired via a dividend reinvestment plan, consistent with established SEC guidance. The filing was signed by an attorney-in-fact and reports both direct and indirect ownership positions (direct: 78,702.5969 shares; indirect by spouse: 1,944 shares). No leadership changes, options, or derivative activity are reported, limiting corporate governance concern.

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^*

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)
07/15/2025

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	07/15/2025		J(1)	V	70.529	A	$63.57	78,521.8979	D
Common Stock	07/15/2025		J(1)	V	180.699	A	$63.5	78,702.5969	D
Common Stock	07/15/2025		J(1)	V	7	A	$63.55	1,944	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	08/14/2025
	** 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.

FAQ

What transactions did MAIN director John Earl Jackson report on Form 4?

He reported three purchases on 07/15/2025: 70.529 shares at $63.57, 180.699 shares at $63.50, and 7 shares at $63.55.

Why were these Main Street Capital purchases exempt from Section 16 reporting?

The Form 4 states the shares were acquired under a dividend reinvestment plan and are exempt under Rule 16a-11.

How many Main Street Capital shares does the reporting person own after the transactions?

Direct beneficial ownership is reported as 78,702.5969 shares; indirect ownership (by wife) is 1,944 shares.

When did the insider transactions for MAIN occur?

The transaction date reported on the Form 4 is 07/15/2025.

Does the Form 4 show any derivative or option activity for MAIN?

No. Table II for derivative securities contains no reported transactions or holdings.