[Form 4] Main Street Capital CORP Insider Trading Activity

Main Street Capital CORP director Stephen B. Solcher reported routine acquisitions of Common Stock through company plans and dividend reinvestment.

Rhea-AI Filing Summary

Main Street Capital CORP director Stephen B. Solcher reported routine acquisitions of Common Stock through company plans and dividend reinvestment. On April 15, 2026, he acquired 178.612 shares at $57.83 per share under a dividend reinvestment plan. On May 4, 2026, he received 538 shares at $0.00 per share under the Deferred Compensation Plan and 448.35 shares at $55.76 per share under the Non-Employee Director Restricted Stock Plan. Following these transactions, his direct holdings were about 51,774.0397 shares of Common Stock.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider SOLCHER STEPHEN B

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	538	$0.00	$0.00
Grant/Award	Common Stock	448.35	$55.76	$25K
Other	Common Stock	178.612	$57.83	$10K

Holdings After Transaction: Common Stock — 51,774.0397 shares (Direct)

Footnotes (3)

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.
2. F2. Shares issued under the Main Street Capital Corporation Non-Employee Director Restricted Stock Plan.
3. F3. Shares issued under the Main Street Capital Corporation Deferred Compensation Plan.

Key Figures

Dividend reinvestment acquisition: 178.612 shares at $57.83 Deferred Compensation Plan shares: 538 shares at $0.00 Restricted Stock Plan shares: 448.35 shares at $55.76 +1 more

4 metrics

Dividend reinvestment acquisition 178.612 shares at $57.83 Common Stock acquired April 15, 2026 via dividend reinvestment plan

Deferred Compensation Plan shares 538 shares at $0.00 Common Stock issued May 4, 2026 under Deferred Compensation Plan

Restricted Stock Plan shares 448.35 shares at $55.76 Common Stock issued May 4, 2026 under Non-Employee Director Restricted Stock Plan

Holdings after transactions 51,774.0397 shares Direct Common Stock ownership following May 4, 2026 award

Key Terms

dividend reinvestment plan, Section 16, Non-Employee Director Restricted Stock Plan, Deferred Compensation Plan, +1 more

5 terms

dividend reinvestment plan financial

"acquired these shares under a dividend reinvestment plan, pursuant to a dividend reinvestment transaction"

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.

Non-Employee Director Restricted Stock Plan financial

"Shares issued under the Main Street Capital Corporation Non-Employee Director Restricted Stock Plan"

Deferred Compensation Plan financial

"Shares issued under the Main Street Capital Corporation Deferred Compensation Plan"

A deferred compensation plan is an arrangement where an employer agrees to pay part of an employee’s pay or bonus at a later date instead of immediately, often to reduce current tax bills or to tie rewards to long-term performance. For investors it matters because these promises create future cash obligations and influence executive incentives and retention; they can affect a company’s reported liabilities, cash flow planning and the risk profile if the business faces financial trouble.

Grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

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

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Accepted by SEC EDGAR 05/06/2026 - 04:45 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^*

SOLCHER STEPHEN B

(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)
05/04/2026

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	04/15/2026		J(1)	V	178.612	A	$57.83	50,787.6897	D
Common Stock	05/04/2026		A(2)		538	A	$0	51,325.6897	D
Common Stock	05/04/2026		A(3)		448.35	A	$55.76	51,774.0397	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.

2. Shares issued under the Main Street Capital Corporation Non-Employee Director Restricted Stock Plan.

3. Shares issued under the Main Street Capital Corporation Deferred Compensation Plan.

	/s/ Jason B. Beauvais , Attorney-in-Fact	05/06/2026
	** 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)