Main Street Capital (MAIN) director boosts stake via DRIP buys in 2025

Rhea-AI Filing Summary

Main Street Capital Corp director John Earl Jackson reported several small automatic share acquisitions through a dividend reinvestment plan in December 2025. On December 15, 2025, he acquired 74.084 shares at $62.05, 193.634 shares at $60.77, and an additional 8 shares at $60.40 held indirectly by his wife. On December 29, 2025, he acquired 89.359 shares at $60.77 and 232.665 shares at $59.75.

All of these transactions are identified with code J and are described as purchases under a dividend reinvestment plan, which is exempt from Section 16 under Rule 16a-11. Following these transactions, Jackson beneficially owned 80,633.5769 shares directly and 1,982 shares indirectly through his wife.

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)
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	74.084	A	$62.05	80,117.9189	D
Common Stock	12/15/2025		J(1)	V	193.634	A	$60.77	80,311.5529	D
Common Stock	12/15/2025		J(1)	V	8	A	$60.4	1,982	I	By Wife
Common Stock	12/29/2025		J(1)	V	89.359	A	$60.77	80,400.9119	D
Common Stock	12/29/2025		J(1)	V	232.665	A	$59.75	80,633.5769	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

What insider activity did MAIN report in this Form 4?

The filing shows director John Earl Jackson acquired multiple small amounts of Main Street Capital Corp (MAIN) common stock in December 2025 through a dividend reinvestment plan, rather than open-market trades.

How many Main Street Capital (MAIN) shares did John Earl Jackson acquire?

On December 15, 2025, he acquired 74.084 shares at $62.05, 193.634 shares at $60.77, and 8 shares at $60.40 indirectly by his wife. On December 29, 2025, he acquired 89.359 shares at $60.77 and 232.665 shares at $59.75.

What are John Earl Jackson’s Main Street Capital share holdings after these transactions?

After the reported dividend reinvestment transactions, Jackson beneficially owned 80,633.5769 shares of Main Street Capital common stock directly and 1,982 shares indirectly through his wife.

Were these MAIN share acquisitions open-market purchases or part of a plan?

The transactions are coded J and the footnote explains that the shares were acquired under a dividend reinvestment plan, a type of automatic plan where cash dividends are used to buy additional shares.

Does John Earl Jackson have indirect ownership of MAIN shares?

Yes. One transaction on December 15, 2025 shows an acquisition of 8 shares at $60.40 reported as indirect ownership "By Wife", and the filing shows 1,982 shares held indirectly after that transaction.

What exemption is referenced for these Main Street Capital dividend reinvestment transactions?

The footnote states that the shares were acquired under a dividend reinvestment plan pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11.