Main Street director acquires 322 shares via dividends

Main Street Capital CORP (MAIN) director John Earl Jackson reported acquiring 322.263 shares of common stock on August 14, 2026 through a dividend reinvestment plan.

Rhea-AI Filing Summary

Main Street Capital CORP (MAIN) director John Earl Jackson reported acquiring 322.263 shares of common stock on August 14, 2026 through a dividend reinvestment plan. The acquisitions included 87.66 shares at $59.23, 225.603 shares at $58.80, and 9 shares at $59.126 held indirectly by his wife, with 2,055 shares held in that indirect account after the transaction.

Insider Trade Summary

Other: 322.263 shares

Other 3 txns

Insider JACKSON JOHN EARL

Role Director

Type	Security	Shares	Price	Value
Other	Common Stock F1	87.66	$59.23	$5K
Other	Common Stock F1	225.603	$58.80	$13K
Other	Common Stock F1	9	$59.126	$532.13

Holdings After Transaction: Common Stock — 85,808.5719 shares (Direct); Common Stock — 2,055 shares (Indirect, By Wife)

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: 322.263 shares Direct acquisition 1: 87.66 shares at $59.23 per share Direct acquisition 2: 225.603 shares at $58.80 per share +2 more

5 metrics

Total shares acquired 322.263 shares Common stock acquired on August 14, 2026 via dividend reinvestment

Direct acquisition 1 87.66 shares at $59.23 per share Common stock acquired on August 14, 2026, direct ownership

Direct acquisition 2 225.603 shares at $58.80 per share Common stock acquired on August 14, 2026, direct ownership

Indirect acquisition 9 shares at $59.126 per share Common stock acquired on August 14, 2026, held indirectly by wife

Indirect holdings after transaction 2,055 shares Common stock held indirectly "By Wife" following August 14, 2026 transaction

Key Terms

dividend reinvestment plan, Rule 16a-11, indirect ownership

3 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.

Rule 16a-11 regulatory

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

indirect ownership financial

"reported as indirect ownership "By Wife" with 2,055 shares after the transaction"

FAQ

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

What insider transaction did MAIN director John Earl Jackson report?

He reported acquiring 322.263 shares of Main Street Capital common stock on August 14, 2026 through a dividend reinvestment plan, in three separate transactions priced around the high-$50s per share.

How many MAIN shares did John Earl Jackson acquire directly and at what prices?

He acquired 87.66 shares at $59.23 per share and 225.603 shares at $58.80 per share of Main Street Capital common stock, both reported as direct ownership.

What indirect holdings in MAIN does John Earl Jackson report through his wife?

He reports an acquisition of 9 shares at $59.126 per share held indirectly "By Wife", with total indirect holdings in that account of 2,055 shares of Main Street Capital common stock following the transaction.

Were John Earl Jackson’s MAIN transactions made under a dividend reinvestment plan?

Yes. A footnote states he acquired these shares under a dividend reinvestment plan, in a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11.

Were John Earl Jackson’s MAIN transactions reported as buys or as other acquisitions?

They were reported with transaction code J as other acquisitions or dispositions, with an acquisition direction, reflecting shares obtained through a dividend reinvestment plan rather than open-market purchases.

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

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Available on EDGAR 09/15/2026 - 04:31 PM Accepted by SEC EDGAR 09/15/2026 - 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^*

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)
08/14/2026

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	08/14/2026		J(1)	V	87.66	A	$59.23	85,582.9689	D
Common Stock	08/14/2026		J(1)	V	225.603	A	$58.8	85,808.5719	D
Common Stock	08/14/2026		J(1)	V	9	A	$59.126	2,055	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	09/15/2026
	** 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)