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  4. [Form 4] Main Street Capital CORP Insider Trading Activity

Main Street Capital insider boosts stake via dividend reinvestment

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Main Street Capital (MAIN) reported insider activity by a director who acquired common shares via a dividend reinvestment plan exempt under Rule 16a-11. Transactions occurred on 09/15/2025 at $66.98 and on 09/26/2025 at $63.72, including small fractional and whole-share buys. Following these transactions, the director directly beneficially owned 1,729,484.6534 shares. Additional indirect holdings are reported through family trusts identified as MS Trust I, II, III, and V.

Positive

  • None.

Negative

  • None.
Insider FOSTER VINCENT D
Role Director
Type Security Shares Price Value
Other Common Stock 12.702 $63.72 $809.34
Other Common Stock 1,356.96 $63.72 $86K
Other Common Stock 10.239 $66.98 $685.81
Other Common Stock 1,093.11 $66.98 $73K
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 1,728,127.693 shares (Direct); Common Stock — 35,307.474 shares (Indirect, MS Trust I)
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. Family trust
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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).
1. Name and Address of Reporting Person*
FOSTER VINCENT D
(Last) (First) (Middle)
1300 POST OAK BLVD
8TH FLOOR
(Street)
HOUSTON TX 77056
(City) (State) (Zip)
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)
3. Date of Earliest Transaction (Month/Day/Year)
09/15/2025
4. If Amendment, Date of Original Filed (Month/Day/Year)
 6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
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 09/15/2025 J(1) V 10.239 A $66.98 1,727,021.8819 D
Common Stock 09/15/2025 J(1) V 1,093.11 A $66.98 1,728,114.9919 D
Common Stock 09/26/2025 J(1) V 12.7015 A $63.72 1,728,127.6934 D
Common Stock 09/26/2025 J(1) V 1,356.96 A $63.72 1,729,484.6534 D
Common Stock 35,307.4742 I MS Trust I(2)
Common Stock 34,557 I MS Trust II(2)
Common Stock 34,557 I MS Trust III(2)
Common Stock 33,300 I MS Trust V(2)
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. Family trust
/s/ Jason B. Beauvais, Attorney-in-Fact 10/14/2025
** 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.

Source: View Original Filing on SEC EDGAR

FAQ

What did MAIN report on this Form 4?

A director acquired Main Street Capital common shares through a dividend reinvestment plan exempt under Rule 16a-11.

When and at what prices were the shares acquired?

Acquisitions occurred on 09/15/2025 at $66.98 and on 09/26/2025 at $63.72.

How many shares does the director own directly after these transactions?

Direct beneficial ownership is 1,729,484.6534 shares following the reported transactions.

Were the transactions part of a dividend reinvestment plan (DRIP)?

Yes. The filing states the shares were acquired under a dividend reinvestment plan under Rule 16a-11.

Are there additional indirect holdings noted?

Yes. Indirect holdings are reported through MS Trust I, MS Trust II, MS Trust III, and MS Trust V.

What transaction code is used in the filing?

The transactions are reported with code J (1), with the footnote explaining DRIP acquisitions.