Dividend reinvestment lifts Main Street Capital (NYSE: MAIN) director stake

Rhea-AI Filing Summary

Main Street Capital director John Earl Jackson reported multiple small Common Stock adjustments tied to a dividend reinvestment plan. On March 13 and March 27, a total of 697.928 shares were recorded across several transactions at prices around the low-to-mid $50s per share.

The filing notes these shares were acquired through a dividend reinvestment transaction that is exempt from Section 16 under Rule 16a-11, indicating a routine, plan-based mechanism rather than open‑market trading. After these entries, Jackson held 81,869.6019 shares directly and 2,007 shares indirectly through his wife.

Insider Trade Summary

5 transactions reported

Mixed 5 txns

Insider JACKSON JOHN EARL

Role Director

Type	Security	Shares	Price	Value
Other	Common Stock	104.489	$52.92	$6K
Other	Common Stock	274.719	$51.53	$14K
Other	Common Stock	87.259	$54.66	$5K
Other	Common Stock	222.461	$54.89	$12K
Other	Common Stock	9	$55.08	$495.72

Holdings After Transaction: Common Stock — 81,594.883 shares (Direct); Common Stock — 2,007 shares (Indirect, By Wife)

Footnotes (1)

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Key Figures

Dividend reinvestment shares: 697.928 shares Price per share (March 27, 2026): $52.92/share Price per share (March 27, 2026): $51.53/share +3 more

6 metrics

Dividend reinvestment shares 697.928 shares Total J-code restructuring shares reported in March 2026

Price per share (March 27, 2026) $52.92/share 104.489 shares of Common Stock via DRIP

Price per share (March 27, 2026) $51.53/share 274.719 shares of Common Stock via DRIP

Price per share (March 13, 2026) $54.66-$55.08/share Three Common Stock DRIP entries including indirect holding

Direct holdings after transactions 81,869.6019 shares Main Street Capital Common Stock held directly by Jackson

Indirect holdings after transactions 2,007 shares Common Stock held indirectly by wife

Key Terms

dividend reinvestment plan, Section 16, Rule 16a-11, transaction code J, +1 more

5 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

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

transaction code J regulatory

"transaction_code": "J""

indirect ownership financial

""direct_or_indirect": "I", "nature_of_ownership": "By Wife""

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^*

JACKSON JOHN EARL

(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)
03/13/2026

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	87.259	A	$54.66	81,267.9329	D
Common Stock	03/13/2026		J(1)	V	222.461	A	$54.89	81,490.3939	D
Common Stock	03/27/2026		J(1)	V	104.489	A	$52.92	81,594.8829	D
Common Stock	03/27/2026		J(1)	V	274.719	A	$51.53	81,869.6019	D
Common Stock	03/13/2026		J(1)	V	9	A	$55.08	2,007	I	By Wife

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	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)