Updated Jul 16, 2026 · Last SEC filing 2026-06-30
Main Street Capital CORP (MAIN) has filed 21 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-30. 7 Form 8-K material event filings were reported by MAIN in the last 90 days. 1 Form 144 notices of proposed sale were filed for MAIN stock. InsiderAlpha tracks every MAIN SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SEC CIK | 0001396440 |
|---|
| Form 4 filings (90d) | 21 |
|---|---|
| Form 8-K filings (90d) | 7 |
| Form 144 notices (90d) | 1 |
| Latest Form 4 filing | 2026-06-30 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Beauvais Jason B | EVP, GC, SECRETARY | S — Open-market sale | 6.8K | $51.73 | $353K | SEC | |
| FOSTER VINCENT D | Insider | G — Bona-fide gift | 35.5K | $0.00 | — | SEC | |
| FOSTER VINCENT D | Insider | G — Bona-fide gift | 35.5K | $0.00 | — | SEC | |
| FOSTER VINCENT D | Insider | G — Bona-fide gift | 71.0K | $0.00 | — | SEC | |
| Griffin Jon Kevin | Insider | J — Other acquisition / disposition | 22 | $50.69 | $1K | SEC | |
| McHugh Ryan | VP, CAO & Assistant Treasurer | J — Other acquisition / disposition | 41 | $50.69 | $2K | SEC | |
| McHugh Ryan | VP, CAO & Assistant Treasurer | J — Other acquisition / disposition | 35 | $50.69 | $2K | SEC | |
| Lane Brian E. | Insider | J — Other acquisition / disposition | 72 | $50.69 | $4K | SEC | |
| Magdol David L. | PRESIDENT, CIO AND SMD | J — Other acquisition / disposition | 68 | $50.65 | $3K | SEC | |
| Lane Brian E. | Insider | J — Other acquisition / disposition | 193 | $50.45 | $10K | SEC | |
| FOSTER VINCENT D | Insider | J — Other acquisition / disposition | 14 | $50.69 | $734 | SEC | |
| Beauvais Jason B | EVP, GC, SECRETARY | J — Other acquisition / disposition | 110 | $50.69 | $6K | SEC | |
| FOSTER VINCENT D | Insider | J — Other acquisition / disposition | 1.5K | $50.69 | $78K | SEC | |
| Griffin Jon Kevin | Insider | J — Other acquisition / disposition | 259 | $50.45 | $13K | SEC | |
| Magdol David L. | PRESIDENT, CIO AND SMD | J — Other acquisition / disposition | 65 | $50.69 | $3K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Main Street Capital CORP (MAIN). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| FOSTER VINCENT D | 8 | $158K |
| JACKSON JOHN EARL | 8 | $111K |
| Griffin Jon Kevin | 6 | $103K |
| Lane Brian E. | 6 | $101K |
| SOLCHER STEPHEN B | 4 | $46K |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in MAIN insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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