Main Street (NYSE: MAIN) COO sells 35,000 shares in August trade

Rhea-AI Filing Summary

Main Street Capital CORP (MAIN) reported that officer Jesse E. Morris, EVP and COO, sold 35,000 shares of common stock on 2026-08-21 in an open-market or private transaction at a weighted average price of $58.55 per share. According to the footnote, these shares were sold in multiple trades at prices ranging from $58.33 to $58.74. Following this sale, Morris directly holds 232,568.4258 shares of Main Street Capital common stock. The filing’s Rule 10b5-1 checkbox was not marked.

Insider Trade Summary

Net Seller: 35,000 shares

Net Sell 1 txn

Insider Morris Jesse E

Role EVP AND COO

Sold 35,000 shs ($2.05M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	35,000	$58.55	$2.05M

Holdings After Transaction: Common Stock — 232,568.4258 shares (Direct)

Footnotes (1)

1. F1. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $58.33 to $58.74, inclusive. The reporting person undertakes to provide to Main Street Capital Corporation, any of its security holders or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Key Figures

Shares sold: 35,000 shares Weighted average sale price: $58.55 per share Sale price range: $58.33 to $58.74 per share +1 more

4 metrics

Shares sold 35,000 shares Common Stock sale by EVP and COO Jesse E. Morris on 2026-08-21

Weighted average sale price $58.55 per share Average price for 35,000 Main Street Capital CORP shares sold

Sale price range $58.33 to $58.74 per share Range of prices for multiple transactions included in the 35,000-share sale

Shares owned after transaction 232,568.4258 shares Directly held by Jesse E. Morris after the 2026-08-21 sale

Key Terms

weighted average price, open market or private transaction, Rule 10b5-1

3 terms

weighted average price financial

"The price reported is a <b>weighted average price</b>."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

open market or private transaction financial

"Transaction code S described as a sale in an <b>open market or private transaction</b>."

Rule 10b5-1 regulatory

"The filing’s <b>Rule 10b5-1</b> checkbox was not marked."

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 transaction did MAIN report for Jesse E. Morris?

MAIN reported that EVP and COO Jesse E. Morris sold 35,000 shares of Main Street Capital common stock on 2026-08-21 in a sale categorized as an open-market or private transaction.

At what price did Jesse E. Morris sell MAIN shares?

The sale by Jesse E. Morris used a weighted average price of $58.55 per share. A footnote explains the shares were sold in multiple trades at prices ranging from $58.33 to $58.74 per share.

How many MAIN shares does Jesse E. Morris hold after this transaction?

After the reported sale, Jesse E. Morris directly holds 232,568.4258 shares of Main Street Capital common stock, as stated in the filing’s post-transaction ownership figure.

Was the MAIN insider sale by Jesse E. Morris under a Rule 10b5-1 plan?

The filing’s Rule 10b5-1 checkbox is not checked, and there is no footnote indicating a trading plan. The transaction is therefore not identified in the filing as being made under a Rule 10b5-1 trading plan.

How is the sale price range for the MAIN insider transaction described?

A footnote states the reported price is a weighted average, with the individual sale prices for the 35,000 shares ranging from $58.33 to $58.74. The insider has undertaken to provide detailed breakdowns upon request.

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 08/24/2026 - 04:51 PM Accepted by SEC EDGAR 08/24/2026 - 04:50 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^*

Morris Jesse 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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP AND COO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/21/2026

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	08/21/2026		S		35,000	D	$58.55(1)	232,568.4258	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 price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $58.33 to $58.74, inclusive. The reporting person undertakes to provide to Main Street Capital Corporation, any of its security holders or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

	/s/ Jason B. Beauvais, Attorney-in-Fact	08/24/2026
	** 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)