Main Street director acquires 251 shares via DRIP

A Main Street Capital director reinvested cash dividends into additional common shares through an exempt dividend reinvestment plan.

Rhea-AI Filing Summary

Main Street Capital CORP (MAIN) director Jon Kevin Griffin reported acquiring small amounts of common stock through a dividend reinvestment plan on August 14, 2026. Two restructuring-type transactions credited him 20.013 shares at $59.23 per share and 231.370 shares at $58.80 per share, in dividend reinvestment transactions exempt from Section 16 under Rule 16a-11. No Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Other: 251.383 shares

Other 2 txns

Insider Griffin Jon Kevin

Role Director

Type	Security	Shares	Price	Value
Other	Common Stock F1	20.013	$59.23	$1K
Other	Common Stock F1	231.37	$58.80	$14K

Holdings After Transaction: Common Stock — 74,914.011 shares (Direct)

Footnotes (1)

1. F1. 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.

Key Figures

Shares acquired (first lot): 20.013 shares Price per share (first lot): $59.23 per share Shares acquired (second lot): 231.370 shares +2 more

5 metrics

Shares acquired (first lot) 20.013 shares Common stock credited on August 14, 2026 via dividend reinvestment plan

Price per share (first lot) $59.23 per share Dividend reinvestment acquisition on August 14, 2026

Shares acquired (second lot) 231.370 shares Common stock credited on August 14, 2026 via dividend reinvestment plan

Price per share (second lot) $58.80 per share Dividend reinvestment acquisition on August 14, 2026

Restructuring shares (code J) 251.383 shares Total shares reported across restructuring-type transactions on August 14, 2026

Key Terms

dividend reinvestment plan, Section 16, Rule 16a-11

3 terms

dividend reinvestment plan financial

"The reporting person acquired these shares under a dividend reinvestment plan"

A dividend reinvestment plan lets shareholders automatically use cash dividends to buy more shares of the same company instead of receiving the money. It matters to investors because it turns regular payouts into a steady way to grow ownership and take advantage of compound returns—like having your savings automatically buy additional slices of a pie over time—while often reducing transaction costs and smoothing purchase timing.

Section 16 regulatory

"dividend reinvestment transaction exempt from Section 16 under Rule 16a-11"

Section 16 is a U.S. securities law rule that governs the trading and disclosure obligations of company insiders — typically officers, directors and large shareholders — to promote transparency and deter unfair profit-taking. It requires insiders to publicly report their stock trades and allows companies or the issuer to reclaim quick, short-term profits from certain insider trades, like a scoreboard and a refund policy that help investors see and limit possible insider advantage.

Rule 16a-11 regulatory

"dividend reinvestment transaction exempt from Section 16 under Rule 16a-11"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did MAIN director Jon Kevin Griffin report?

He reported acquiring two lots of Main Street Capital common stock on August 14, 2026, through a dividend reinvestment plan, classified as other acquisition or disposition transactions under code J and exempt from Section 16 under Rule 16a-11.

How many MAIN shares were acquired in each dividend reinvestment transaction?

Jon Kevin Griffin was credited with 20.013 shares of Main Street Capital at $59.23 per share and 231.370 shares at $58.80 per share, both on August 14, 2026, under the company’s dividend reinvestment plan.

Was the MAIN insider transaction under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is marked negative, and the footnote specifies the shares were acquired under a dividend reinvestment plan, not a pre-arranged trading plan.

What does the Form 4 say about Section 16 treatment for these MAIN transactions?

The Form 4 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, indicating these acquisitions are treated as exempt transactions.

Did the Form 4 disclose Griffin’s total MAIN holdings after these transactions?

No. For both transactions, the field that would normally show total shares following the transaction is blank, so the Form 4 does not state his overall post-transaction Main Street Capital holdings.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 09/15/2026 - 04:31 PM Accepted by SEC EDGAR 09/15/2026 - 04:30 PM Learn about SEC filing dates

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 TEXAS 77056

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/14/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	08/14/2026		J(1)	V	20.013	A	$59.23	74,682.641	D
Common Stock	08/14/2026		J(1)	V	231.37	A	$58.8	74,914.011	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	09/15/2026
	** 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.
* Form 4: SEC 1474 (03-26)