Main Street Capital (NYSE: MAIN) director acquires 824.554 shares via dividend reinvestment

Rhea-AI Filing Summary

Main Street Capital Corp director Brian E. Lane reported a series of acquisitions of common stock through a dividend reinvestment plan. Across six code J transactions on June 15, June 29 and July 15, 2026, he acquired a total of 824.554 shares at prices between $51.01 and $53.41 per share. The footnote states these were dividend reinvestment transactions exempt from Section 16 under Rule 16a-11. Post-transaction share holdings are not stated in this report.

Insider Trade Summary

Net Buyer: 824.554 shares

Net Buy 6 txns

Insider Lane Brian E.

Role Director

Type	Security	Shares	Price	Value
Other	Common Stock F1	71.5	$53.09	$4K
Other	Common Stock F1	188.405	$53.41	$10K
Other	Common Stock F1	83.752	$51.01	$4K
Other	Common Stock F1	219.663	$51.56	$11K
Other	Common Stock F1	70.822	$52.02	$4K
Other	Common Stock F1	190.412	$51.29	$10K

Holdings After Transaction: Common Stock — 53,085.6188 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: 824.554 shares Highest reported price: $53.4100 per share Lowest reported price: $51.0100 per share +3 more

6 metrics

Total shares acquired 824.554 shares Aggregate restructuring/acquisition shares across six code J transactions

Highest reported price $53.4100 per share Code J acquisition of 188.4050 shares on 2026-07-15

Lowest reported price $51.0100 per share Code J acquisition of 83.7520 shares on 2026-06-29

June 15, 2026 acquisitions 261.2340 shares Two code J transactions at $52.0200 and $51.2900 per share

June 29, 2026 acquisitions 303.4150 shares Two code J transactions at $51.0100 and $51.5600 per share

July 15, 2026 acquisitions 259.9050 shares Two code J transactions at $53.0900 and $53.4100 per share

Key Terms

dividend reinvestment plan, Section 16, Rule 16a-11, Rule 10b5-1

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.

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"

Rule 10b5-1 regulatory

"The filing’s Rule 10b5-1 checkbox is marked false"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

FAQ

What insider activity did Main Street Capital (MAIN) report in this Form 4?

Main Street Capital reported that director Brian E. Lane acquired 824.554 shares of common stock in six transactions under a dividend reinvestment plan, with trade dates on June 15, June 29 and July 15, 2026.

How many Main Street Capital (MAIN) shares did Brian E. Lane acquire and at what prices?

Brian E. Lane acquired a total of 824.554 shares of Main Street Capital common stock at per-share prices ranging from $51.01 to $53.41, according to six reported code J transactions in 2026.

What is the nature of the code J transactions reported for MAIN in this filing?

Each code J transaction is described as an other acquisition or disposition, with footnotes explaining that the shares were acquired under a dividend reinvestment plan, qualifying as a dividend reinvestment transaction exempt under Rule 16a-11.

Were the Main Street Capital (MAIN) insider acquisitions made under a Rule 10b5-1 plan?

The filing’s Rule 10b5-1 checkbox is marked false, indicating the transactions were not affirmed as being made pursuant to a Rule 10b5-1 trading plan. The footnote instead ties them to a dividend reinvestment plan under Rule 16a-11.

Does the Form 4 for MAIN disclose Brian E. Lane’s holdings after these transactions?

For each transaction, the field for shares beneficially owned following the transaction is not filled in, so this report does not disclose Lane’s total post-transaction holdings of Main Street Capital common stock.

What regulatory exemption applies to Brian E. Lane’s Main Street Capital (MAIN) share acquisitions?

The footnote states that the shares were acquired under a dividend reinvestment plan in a dividend reinvestment transaction that is exempt from Section 16 reporting requirements under Rule 16a-11 of the Securities Exchange Act.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/14/2026 - 04:34 PM Accepted by SEC EDGAR 08/14/2026 - 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^*

Lane Brian E.

(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	70.822	A	$52.02	52,331.8868	D
Common Stock	06/15/2026		J(1)	V	190.412	A	$51.29	52,522.2988	D
Common Stock	06/29/2026		J(1)	V	83.752	A	$51.01	52,606.0508	D
Common Stock	06/29/2026		J(1)	V	219.663	A	$51.56	52,825.7138	D
Common Stock	07/15/2026		J(1)	V	71.5	A	$53.09	52,897.2138	D
Common Stock	07/15/2026		J(1)	V	188.405	A	$53.41	53,085.6188	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)