What SEC filings does Main Street Capital Corporation submit to the SEC?

Main Street Capital Corporation (MAIN) submits several types of SEC filings including Form 4 (insider transactions), Form 144 (proposed insider sales), 8-K reports (material events such as earnings releases, acquisitions, leadership changes), and periodic reports — the 10-Q (quarterly) and 10-K (annual). All filings are publicly available through SEC EDGAR.

What does a Form 4 filing tell me about MAIN?

A Form 4 for MAIN discloses a transaction by a company insider — typically a director, officer, or 10%+ shareholder. It shows the source-reported date, number of shares, price, and updated ownership. These facts do not establish motive or predict future returns.

How do I interpret an 8-K filing from Main Street Capital Corporation?

An 8-K signals a material event requiring prompt disclosure. Common triggers include earnings pre-announcements, acquisitions, leadership appointments or departures, credit changes, or regulatory actions. Read the item codes inside the filing to understand exactly what was disclosed before drawing conclusions.

What is the difference between a 10-K and 10-Q for MAIN?

The 10-K is Main Street Capital Corporation's annual report with fully audited financial statements, comprehensive MD&A, and complete risk factor disclosures — filed 60–90 days after fiscal year-end. The 10-Q is a lighter quarterly report with unaudited financials filed for the first three quarters. Together they provide a continuous financial picture of the company.

Where can I see all MAIN SEC filings directly on EDGAR?

You can view all historical Main Street Capital Corporation filings on the SEC EDGAR company page for MAIN. Each filing card on this page links directly to the original SEC document.

How often does Main Street Capital Corporation file with the SEC?

Main Street Capital Corporation files one 10-K per year and up to three 10-Qs per year. Form 4 insider transactions must be reported within two business days of each trade, so the frequency depends on how often insiders are buying or selling MAIN shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

MAIN SEC Filing News — Main Street Capital Corporation

Latest SEC filings for Main Street Capital Corporation (MAIN) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-10-08.

Main Street Capital Corporation is a business development company and a small business investment company specializing in direct and indirect investments. In direct investments, the firm specializes in private equity capital to lower middle market companies. The firm specializes in recapitalizations, loan, growth capital, mezzanine debt, corporate carveouts, family estate planning, management buyouts, refinancing, private loan, private credit solutions, senior secured term debt, unintranche term…

Sector: Financial Services Industry: Asset Management Market Cap: $5.0B CIK: 1396440

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

Rule-based classifications for MAIN currently lean bearish. Of the 12 filing records displayed, 1 carry bearish classifications (such as insider sales or negative 8-K disclosures) versus 0 bullish. This does not necessarily signal fundamental deterioration — insiders sell for many reasons — but it is worth monitoring alongside the company's core financial metrics.

MAIN Filing Activity Snapshot 2026-08-24 — 2026-10-08

Insider Transactions (Form 4)

0 buys vs 1 sell

Net insider selling in this period — insiders sell for many reasons beyond conviction.

Largest Form 144 Filing

$2.05M

Morris Jesse E (EVP AND COO) · 2026-08-24

35,000 shares · Form 4

Insider Transactions 11 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 11 filings in this group are Form 4s for Main Street Capital Corporation.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 11 insider filings shown, the breakdown is 9 other reported transaction, 1 gift and 1 open-market sale. 1 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Other reported transaction ×9: The filing reports a transaction type that does not map to a routine purchase, sale, award or withholding.
Gift ×1: Shares were transferred as a gift, typically for estate or charitable planning. No sale into the market took place.
Open-market sale ×1: The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Form 4 Other reported transaction Tax / Compensation Filing 2026-09-15

MAIN insider Form 4 filed for equity award, exercise, or tax withholding

McHugh Ryan (VP, CAO & Assistant Treasurer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The filing reports a transaction type that does not map to a routine purchase, sale, award or withholding.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`J`	Other transaction	36	$59.23	$2.1K
`J`	Other transaction	31	$59.23	$1.8K

Filing: Form 4 (Insider Transaction) Insider: McHugh Ryan (VP, CAO & Assistant Treasurer) Shares: 67

View on SEC EDGAR → Open Filing Document →

Form 4 Other reported transaction Tax / Compensation Filing 2026-09-15

MAIN insider Form 4 filed for equity award, exercise, or tax withholding

Magdol David L. (PRESIDENT, CIO AND SMD) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The filing reports a transaction type that does not map to a routine purchase, sale, award or withholding.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`J`	Other transaction	60	$59.00	$3.5K
`J`	Other transaction	57	$59.23	$3.4K

Filing: Form 4 (Insider Transaction) Insider: Magdol David L. (PRESIDENT, CIO AND SMD) Shares: 117

View on SEC EDGAR → Open Filing Document →

Form 4 Other reported transaction Tax / Compensation Filing 2026-09-15

MAIN insider Form 4 filed for equity award, exercise, or tax withholding

JACKSON JOHN EARL (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The filing reports a transaction type that does not map to a routine purchase, sale, award or withholding.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`J`	Other transaction	87	$59.23	$5.2K
`J`	Other transaction	225	$58.80	$13.2K
`J`	Other transaction	9	$59.13	$532.13

Filing: Form 4 (Insider Transaction) Insider: JACKSON JOHN EARL (Director) Shares: 321

View on SEC EDGAR → Open Filing Document →

Form 4 Other reported transaction Tax / Compensation Filing 2026-09-15

MAIN insider Form 4 filed for equity award, exercise, or tax withholding

Lane Brian E. (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The filing reports a transaction type that does not map to a routine purchase, sale, award or withholding.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`J`	Other transaction	64	$59.23	$3.8K
`J`	Other transaction	171	$58.80	$10.1K

Filing: Form 4 (Insider Transaction) Insider: Lane Brian E. (Director) Shares: 235

View on SEC EDGAR → Open Filing Document →

Form 4 Other reported transaction Tax / Compensation Filing 2026-09-15

MAIN insider Form 4 filed for equity award, exercise, or tax withholding

Griffin Jon Kevin (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The filing reports a transaction type that does not map to a routine purchase, sale, award or withholding.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`J`	Other transaction	20	$59.23	$1.2K
`J`	Other transaction	231	$58.80	$13.6K

Filing: Form 4 (Insider Transaction) Insider: Griffin Jon Kevin (Director) Shares: 251

View on SEC EDGAR → Open Filing Document →

Form 4 Other reported transaction Tax / Compensation Filing 2026-09-15

MAIN insider Form 4 filed for equity award, exercise, or tax withholding

SOLCHER STEPHEN B (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The filing reports a transaction type that does not map to a routine purchase, sale, award or withholding.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`J`	Other transaction	185	$58.80	$10.9K

Filing: Form 4 (Insider Transaction) Insider: SOLCHER STEPHEN B (Director) Shares: 185

View on SEC EDGAR → Open Filing Document →

Form 4 Other reported transaction Tax / Compensation Filing 2026-09-15

MAIN insider Form 4 filed for equity award, exercise, or tax withholding

SHIVE DUNIA A (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The filing reports a transaction type that does not map to a routine purchase, sale, award or withholding.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`J`	Other transaction	97	$58.80	$5.7K

Filing: Form 4 (Insider Transaction) Insider: SHIVE DUNIA A (Director) Shares: 97

View on SEC EDGAR → Open Filing Document →

Form 4 Other reported transaction Tax / Compensation Filing 2026-09-15

MAIN insider Form 4 filed for equity award, exercise, or tax withholding

Hyzak Dwayne L. (Director, CEO, SMD) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The filing reports a transaction type that does not map to a routine purchase, sale, award or withholding.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`J`	Other transaction	406	$59.23	$24.0K

Filing: Form 4 (Insider Transaction) Insider: Hyzak Dwayne L. (Director, CEO, SMD) Shares: 406

View on SEC EDGAR → Open Filing Document →

Form 4 Other reported transaction Tax / Compensation Filing 2026-09-15

MAIN insider Form 4 filed for equity award, exercise, or tax withholding

FOSTER VINCENT D (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The filing reports a transaction type that does not map to a routine purchase, sale, award or withholding.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`J`	Other transaction	12	$59.23	$710.76
`J`	Other transaction	1,055	$59.23	$62.5K
`J`	Other transaction	80	$59.23	$4.7K
`J`	Other transaction	156	$59.23	$9.2K
`J`	Other transaction	80	$59.23	$4.7K

Filing: Form 4 (Insider Transaction) Insider: FOSTER VINCENT D (Director) Shares: 1,383

View on SEC EDGAR → Open Filing Document →

Form 4 Gift Tax / Compensation Filing 2026-09-03

MAIN insider Form 4 filed for equity award, exercise, or tax withholding

Beauvais Jason B (EVP, GC, SECRETARY) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were transferred as a gift, typically for estate or charitable planning. No sale into the market took place.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`J`	Other transaction	98	$59.23	$5.8K
`G`	Gift	126	—	—

Filing: Form 4 (Insider Transaction) Insider: Beauvais Jason B (EVP, GC, SECRETARY) Shares: 224

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-24

MAIN insider Morris Jesse E (EVP AND COO) sold 35,000 shares (~$2.05M)

Morris Jesse E, listed as EVP AND COO at Main Street Capital CORP, reported an open-market sale of 35,000 MAIN shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	35,000	$58.55	$2.05M

Filing: Form 4 (Insider Transaction) Insider: Morris Jesse E (EVP AND COO) Shares: 35,000 Est. Value: $2.05M

View on SEC EDGAR → Open Filing Document →

Material Events 1 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There is 1 in this period for Main Street Capital Corporation. Each 8-K names the item number it is filed under, and that number is the fastest way to tell a routine disclosure from a consequential one.

Item 2.02 is an earnings release, Item 5.02 is a change of directors or officers, and Item 1.01 or 2.01 covers a material agreement or a completed acquisition. Item 7.01 and Item 8.01 are the general-purpose disclosure items and carry no fixed meaning on their own.

Form 8-K Material Company Update 2026-10-08

MAIN filed 8-K — material company event

Main Street Capital CORP filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

How we classify Main Street Capital Corporation's filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on MAIN. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — MAIN SEC Filings

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MAIN Full Analysis

Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.

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