Main Street Capital (MAIN) president receives 58,940-share grant, tax shares withheld

Rhea-AI Filing Summary

Main Street Capital CORP President and CIO David L. Magdol reported routine equity compensation and related share movements. He received a grant of 58,940 shares of common stock at $0.00 per share under the Main Street Capital Corporation 2022 Equity and Incentive Plan.

On the same date, 23,596 shares were withheld at $52.96 per share to cover tax liabilities upon vesting of restricted shares, as approved by the board’s Compensation Committee under Rule 16b-3. Additional small transactions classified as “other” reflect dividend reinvestment plan activity. Following these transactions, Magdol directly holds about 440,437 shares of common stock.

Insider Trade Summary

5 transactions reported

Mixed 5 txns

Insider Magdol David L.

Role PRESIDENT, CIO AND SMD

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	58,940	$0.00	--
Tax Withholding	Common Stock	23,596	$52.96	$1.25M
Other	Common Stock	70.746	$52.92	$4K
Other	Common Stock	62.488	$54.8826	$3K
Other	Common Stock	59.08	$54.66	$3K

Holdings After Transaction: Common Stock — 464,033.343 shares (Direct)

Footnotes (1)

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. Shares issued under the Main Street Capital Corporation 2022 Equity and Incentive Plan. Shares withheld for payment of tax liability upon vesting of restricted shares granted under the Main Street Capital Corporation 2022 Equity and Incentive Plan. This withholding transaction was approved by the Compensation Committee of Main Street's Board of Directors in accordance with Rule 16b-3(d)(1) of the Securities Exchange Act of 1934 (the "Act"), and as such, the sale is exempt from section 16(b) of the Act pursuant to Rule 16b-3(e) promulgated thereunder.

Key Figures

Equity grant: 58,940 shares Tax withholding shares: 23,596 shares Post-transaction holdings: 440,437.3425 shares +2 more

5 metrics

Equity grant 58,940 shares Common Stock granted at $0.00 per share on April 1, 2026

Tax withholding shares 23,596 shares Withheld at $52.96 per share to cover tax liability on April 1, 2026

Post-transaction holdings 440,437.3425 shares Direct ownership of Common Stock following tax-withholding transaction

Dividend reinvestment total 192.3135 shares Other J-code restructuring transactions linked to dividend reinvestment plan

Dividend reinvestment price example $54.8826 per share Price for 62.4875-share J-code transaction on March 13, 2026

Key Terms

dividend reinvestment plan, Main Street Capital Corporation 2022 Equity and Incentive Plan, Rule 16a-11, Rule 16b-3

4 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.

Main Street Capital Corporation 2022 Equity and Incentive Plan financial

"Shares issued under the Main Street Capital Corporation 2022 Equity and Incentive Plan."

Rule 16a-11 regulatory

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

Rule 16b-3 regulatory

"approved by the Compensation Committee ... and as such, the sale is exempt from section 16(b) of the Act pursuant to Rule 16b-3(e)"

Rule 16b-3 is a Securities and Exchange Commission regulation that exempts certain routine, pre-approved transactions by company insiders from automatic liability for short-term trading profits. It acts like a safe harbor: if an insider follows a formal plan or the board approves specific transactions in advance, profits from buying and selling company stock within six months are not automatically reclaimed. Investors care because the rule clarifies when insider trades are permissible and reduces uncertainty about potential clawbacks.

Form 4 Insider Transactions: What Each Field Means →

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^*

Magdol David L.

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	PRESIDENT, CIO AND SMD

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/01/2026

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	03/13/2026		J(1)	V	62.4875	A	$54.8826	404,963.5165	D
Common Stock	03/13/2026		J(1)	V	59.08	A	$54.66	405,022.5965	D
Common Stock	03/27/2026		J(1)	V	70.746	A	$52.92	405,093.3425	D
Common Stock	04/01/2026		A(2)		58,940	A	$0	464,033.3425	D
Common Stock	04/01/2026		F(3)		23,596	D	$52.96	440,437.3425	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 2022 Equity and Incentive Plan.

3. Shares withheld for payment of tax liability upon vesting of restricted shares granted under the Main Street Capital Corporation 2022 Equity and Incentive Plan. This withholding transaction was approved by the Compensation Committee of Main Street's Board of Directors in accordance with Rule 16b-3(d)(1) of the Securities Exchange Act of 1934 (the "Act"), and as such, the sale is exempt from section 16(b) of the Act pursuant to Rule 16b-3(e) promulgated thereunder.

	/s/ Jason B. Beauvais, Attorney-in-Fact	04/03/2026
	** 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)

FAQ

What did MAIN executive David L. Magdol report in this Form 4?

David L. Magdol reported a grant of 58,940 Main Street Capital common shares and related tax and reinvestment transactions. These include shares issued under the 2022 Equity and Incentive Plan and shares withheld to pay taxes when restricted stock vested.

How many Main Street Capital (MAIN) shares were granted to David L. Magdol?

He received a grant of 58,940 shares of Main Street Capital common stock at $0.00 per share. The grant was issued under the Main Street Capital Corporation 2022 Equity and Incentive Plan as part of his equity-based compensation.

Why were some MAIN shares disposed of in this Form 4 filing?

23,596 shares were withheld at $52.96 per share to satisfy tax liabilities on vested restricted shares. This withholding was approved by the Compensation Committee and is treated as a tax-payment mechanism rather than an open-market sale of Main Street Capital stock.

What is David L. Magdol’s Main Street Capital shareholding after these transactions?

After the reported transactions, David L. Magdol directly owns about 440,437.3425 shares of Main Street Capital common stock. This figure reflects the new grant, the tax-withholding shares, and small dividend reinvestment plan transactions disclosed in the Form 4.

What are the small ‘J’ code transactions in MAIN’s Form 4 for David L. Magdol?

The J-code entries reflect small movements totaling about 192.3135 shares at prices around $53–55. A footnote explains these shares were acquired through a dividend reinvestment plan, which automatically reinvests cash dividends into additional Main Street Capital shares.