Main Street director adds shares via dividend plan

Main Street Capital CORP director Jon Kevin Griffin reported routine share acquisitions through a dividend reinvestment plan.

Rhea-AI Filing Summary

Main Street Capital CORP director Jon Kevin Griffin reported routine share acquisitions through a dividend reinvestment plan. On May 15, 2026, he acquired 259.092 shares of common stock at $50.45 per share and 22.468 shares at $50.69 per share in transactions classified as other acquisitions or dispositions.

These dividend reinvestments are exempt from Section 16 under Rule 16a-11 and are not open-market buys or sales. After these transactions, Griffin directly owned 73,787.245 shares of Main Street Capital common stock.

Insider Trade Summary

Other: 281.56 shares

Other 2 txns

Insider Griffin Jon Kevin

Role Director

Type	Security	Shares	Price	Value
Other	Common Stock	22.468	$50.69	$1K
Other	Common Stock	259.092	$50.45	$13K

Holdings After Transaction: Common Stock — 73,787.245 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

Dividend reinvestment lot 1: 259.092 shares at $50.45 Dividend reinvestment lot 2: 22.468 shares at $50.69 Total shares added: 281.56 shares +3 more

6 metrics

Dividend reinvestment lot 1 259.092 shares at $50.45 Common Stock credited on May 15, 2026

Dividend reinvestment lot 2 22.468 shares at $50.69 Common Stock credited on May 15, 2026

Total shares added 281.56 shares Reinvestment-related restructuring shares

Post-transaction holdings 73,528.153 shares Direct ownership after second transaction

First transaction value $13,072.58 259.092 shares × $50.45 per share

Second transaction value $1,138.70 22.468 shares × $50.69 per share

Key Terms

dividend reinvestment plan, Section 16, Rule 16a-11, other acquisition or disposition

4 terms

dividend reinvestment plan financial

"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."

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

"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."

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

"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."

other acquisition or disposition financial

"transaction_code_description: Other acquisition or disposition"

FAQ

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

What did Main Street Capital (MAIN) director Jon Kevin Griffin report in this Form 4?

Director Jon Kevin Griffin reported acquiring common stock through a dividend reinvestment plan. Two transactions on May 15, 2026 credited additional fractional shares, increasing his direct ownership to 73,528.153 shares without any open-market buying or selling activity.

How many Main Street Capital (MAIN) shares were added through the dividend reinvestment?

The dividend reinvestment credited 259.092 shares at $50.45 and 22.468 shares at $50.69. In total, 281.56 shares were added to Jon Kevin Griffin’s direct holdings under the company’s dividend reinvestment plan.

Is Jon Kevin Griffin’s Form 4 for MAIN a buy or sell signal?

The Form 4 does not show open-market buys or sells. Instead, it reflects shares acquired automatically via a dividend reinvestment plan, classified as other acquisitions or dispositions and exempt from Section 16 under Rule 16a-11.

How many Main Street Capital (MAIN) shares does Jon Kevin Griffin own after these transactions?

Following the reported dividend reinvestment transactions, Jon Kevin Griffin directly owned 73,528.153 shares of Main Street Capital common stock. This figure represents his direct position after crediting the additional reinvested dividend shares.

What is the significance of Rule 16a-11 in Jon Kevin Griffin’s MAIN Form 4?

Rule 16a-11 exempts dividend reinvestment transactions from certain Section 16 reporting and liability provisions. The footnote specifies that Griffin’s new shares were acquired under a dividend reinvestment plan, highlighting that these are automatic, plan-based acquisitions rather than discretionary market trades.

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

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Accepted by SEC EDGAR 05/28/2026 - 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)
05/15/2026

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	05/15/2026		J(1)	V	22.468	A	$50.69	73,528.153	D
Common Stock	05/15/2026		J(1)	V	259.092	A	$50.45	73,787.245	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	05/28/2026
	** 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)