Main Street Capital director adds shares via DRIP

Main Street Capital CORP director Jon Kevin Griffin reported a series of acquisitions of Common Stock through a dividend reinvestment plan.

Rhea-AI Filing Summary

Main Street Capital CORP director Jon Kevin Griffin reported a series of acquisitions of Common Stock through a dividend reinvestment plan. On 2026-06-15, 2026-06-29, and 2026-07-15, he acquired an aggregate of 875.383 shares in six transactions at per-share prices ranging from $51.01 to $53.41. The footnote states these were dividend reinvestment transactions exempt from Section 16 under Rule 16a-11.

Insider Trade Summary

Other: 875.383 shares

Other 6 txns

Insider Griffin Jon Kevin

Role Director

Type	Security	Shares	Price	Value
Other	Common Stock F1	22.217	$53.09	$1K
Other	Common Stock F1	253.461	$53.41	$14K
Other	Common Stock F1	26.024	$51.01	$1K
Other	Common Stock F1	295.514	$51.56	$15K
Other	Common Stock F1	22.006	$52.02	$1K
Other	Common Stock F1	256.161	$51.29	$13K

Holdings After Transaction: Common Stock — 74,662.628 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

Total shares acquired: 875.383 shares Lowest reported price: $51.0100 per share Highest reported price: $53.4100 per share +3 more

6 metrics

Total shares acquired 875.383 shares Aggregate restructuring/acquisition shares across six J-code transactions

Lowest reported price $51.0100 per share Dividend reinvestment acquisition on 2026-06-29

Highest reported price $53.4100 per share Dividend reinvestment acquisition on 2026-07-15

Shares acquired 2026-06-15 278.167 shares Two J-code dividend reinvestment transactions on 2026-06-15

Shares acquired 2026-06-29 321.538 shares Two J-code dividend reinvestment transactions on 2026-06-29

Shares acquired 2026-07-15 275.678 shares Two J-code dividend reinvestment transactions on 2026-07-15

Key Terms

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

4 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.

dividend reinvestment transaction financial

"pursuant to a dividend reinvestment transaction exempt from Section 16"

A dividend reinvestment transaction is when an investor uses cash dividends paid by a company to automatically buy more of that company's shares instead of taking the money as cash. Like choosing to roll interest back into a savings account, it increases your share count over time and can speed up growth through compounding, so investors care because it changes ownership stake, long‑term returns, and sometimes tax or record‑keeping implications.

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

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

FAQ

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

What insider transactions did Main Street Capital (MAIN) report for Jon Kevin Griffin?

Main Street Capital reported that director Jon Kevin Griffin acquired 875.383 shares of Common Stock in six transactions through a dividend reinvestment plan on 2026-06-15, 2026-06-29, and 2026-07-15.

Were the MAIN Form 4 transactions open-market buys or dividend reinvestments?

The Form 4 states that all reported transactions were dividend reinvestment acquisitions under a dividend reinvestment plan, not open-market purchases, and are described as transactions exempt from Section 16 under Rule 16a-11.

How many Main Street Capital (MAIN) shares did Griffin acquire on each date?

On 2026-06-15, he acquired 278.167 shares; on 2026-06-29, 321.538 shares; and on 2026-07-15, 275.678 shares, totaling 875.383 shares through dividend reinvestment transactions.

What prices were reported for Jon Kevin Griffin’s MAIN dividend reinvestment transactions?

Reported per-share prices ranged from $51.01 to $53.41. Individual transactions were priced at $51.01, $51.56, $51.29, $52.02, $53.09, and $53.41 for the respective share amounts acquired under the dividend reinvestment plan.

Are Jon Kevin Griffin’s MAIN dividend reinvestment transactions under a Rule 10b5-1 plan?

The filing’s Rule 10b5-1 checkbox is not marked as affirmative, and the footnote instead describes the acquisitions as dividend reinvestment transactions exempt from Section 16 under Rule 16a-11, without citing a 10b5-1 plan.

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

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 08/14/2026 - 04:30 PM EDT 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)
06/15/2026

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	06/15/2026		J(1)	V	22.006	A	$52.02	73,809.251	D
Common Stock	06/15/2026		J(1)	V	256.161	A	$51.29	74,065.412	D
Common Stock	06/29/2026		J(1)	V	26.024	A	$51.01	74,091.436	D
Common Stock	06/29/2026		J(1)	V	295.514	A	$51.56	74,386.95	D
Common Stock	07/15/2026		J(1)	V	22.217	A	$53.09	74,409.167	D
Common Stock	07/15/2026		J(1)	V	253.461	A	$53.41	74,662.628	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	08/14/2026
	** 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)