Main Street Capital Corp is a principal investment firm focused on providing customized long-term debt and equity capital solutions to lower middle market ("LMM") companies and debt capital to private ("Private Loan") companies owned by or in the process of being acquired by a private equity fund. The group invests principally in secured debt investments, equity investments, warrants, and other securities of LMM companies, typically based in the U.S. The company operates as a single segment with a principal investment objective to maximize total return by generating current income from debt investments and current income and capital appreciation from equity and equity-related investments.
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market purchase | 2 | 2,550 | $151K |
| Open-market sale | 2 | 41,830 | $2.40M |
| Other acquisition / disposition | 58 | 11,003 |
Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
179 Form 4 filings on record, the earliest from Oct 17, 2024, newest first. Filing history page 1 of 3.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Open-market sale | Common Stock | 35,000 | $58.55 | $2.05M | ||
| Other | Common Stock | 107.5 | $51.29 | $6K | ||
| Other | Common Stock | 124.02 | $51.56 | $6K | ||
| Other | Common Stock | 106.37 | $53.41 | $6K | ||
| Jon Kevin Griffin - Director | Other | Common Stock | 22.01 | $52.02 | $1K | |
| Jon Kevin Griffin - Director | Other | Common Stock | 256.16 | $51.29 | $13K | |
| Jon Kevin Griffin - Director | Other | Common Stock | 26.02 | $51.01 | $1K | |
| Jon Kevin Griffin - Director | Other | Common Stock | 295.51 | $51.56 | $15K | |
| Jon Kevin Griffin - Director | Other | Common Stock | 22.22 | $53.09 | $1K | |
| Jon Kevin Griffin - Director | Other | Common Stock | 253.46 | $53.41 | $14K | |
| Stephen B. Solcher - Director | Other | Common Stock | 205.62 | $51.29 | $11K | |
| Stephen B. Solcher - Director | Other | Common Stock | 237.21 | $51.56 | $12K | |
| Stephen B. Solcher - Director | Other | Common Stock | 203.45 | $53.41 | $11K | |
| Ryan McHugh - Officer | Other | Common Stock | 40.45 | $52.02 | $2K | |
| Ryan McHugh - Officer | Other | Common Stock | 34.11 | $52.02 | $2K | |
| Ryan McHugh - Officer | Other | Common Stock | 47.84 | $51.01 | $2K | |
| Ryan McHugh - Officer | Other | Common Stock | 34.11 | $51.01 | $2K | |
| Ryan McHugh - Officer | Other | Common Stock | 40.84 | $53.09 | $2K | |
| Ryan McHugh - Officer | Other | Common Stock | 34.43 | $53.09 | $2K | |
| Ryan McHugh - Officer | Open-market purchase | Common Stock | 500 | $59.09 | $30K | |
| Ryan McHugh - Officer | Open-market purchase | Common Stock | 2,050 | $59.04 | $121K | |
| John Earl Jackson - Director | Other | Common Stock | 96.39 | $52.02 | $5K | |
| John Earl Jackson - Director | Other | Common Stock | 249.78 | $51.29 | $13K | |
| John Earl Jackson - Director | Other | Common Stock | 113.99 | $51.01 | $6K | |
| John Earl Jackson - Director | Other | Common Stock | 288.15 | $51.56 | $15K | |
| John Earl Jackson - Director | Other | Common Stock | 97.31 | $53.09 | $5K | |
| John Earl Jackson - Director | Other | Common Stock | 247.14 | $53.41 | $13K | |
| John Earl Jackson - Director | Other | Common Stock | 10 | $52.18 | $522 | |
| John Earl Jackson - Director | Other | Common Stock | 10 | $53.47 | $535 | |
| Brian E. Lane - Director | Other | Common Stock | 83.75 | $51.01 | $4K | |
| Brian E. Lane - Director | Other | Common Stock | 219.66 | $51.56 | $11K | |
| Brian E. Lane - Director | Other | Common Stock | 71.5 | $53.09 | $4K | |
| Brian E. Lane - Director | Other | Common Stock | 188.41 | $53.41 | $10K | |
| Brian E. Lane - Director | Other | Common Stock | 70.82 | $52.02 | $4K | |
| Brian E. Lane - Director | Other | Common Stock | 190.41 | $51.29 | $10K | |
| Other | Common Stock | 66.52 | $52.30 | $3K | ||
| Other | Common Stock | 63.34 | $52.02 | $3K | ||
| Other | Common Stock | 74.9 | $51.01 | $4K | ||
| Other | Common Stock | 66.61 | $53.50 | $4K | ||
| Other | Common Stock | 63.95 | $53.09 | $3K | ||
| Other | Common Stock | 108.06 | $52.02 | $6K | ||
| Other | Common Stock | 127.79 | $51.01 | $7K | ||
| Other | Common Stock | 109.1 | $53.09 | $6K | ||
| Other | Common Stock | 447.07 | $52.02 | $23K | ||
| Other | Common Stock | 528.69 | $51.01 | $27K | ||
| Other | Common Stock | 451.35 | $53.09 | $24K | ||
| Vincent D. Foster - Director | Other | Common Stock | 14.2 | $52.02 | $739 | |
| Vincent D. Foster - Director | Other | Common Stock | 1,161 | $52.02 | $60K | |
| Vincent D. Foster - Director | Other | Common Stock | 16.79 | $51.01 | $856 | |
| Vincent D. Foster - Director | Other | Common Stock | 1,373 | $51.01 | $70K | |
| Vincent D. Foster - Director | Other | Common Stock | 14.33 | $53.09 | $761 | |
| Vincent D. Foster - Director | Other | Common Stock | 1,172 | $53.09 | $62K | |
| Vincent D. Foster - Director | Other | Common Stock | 88.72 | $52.02 | $5K | |
| Vincent D. Foster - Director | Other | Common Stock | 104.91 | $51.01 | $5K | |
| Vincent D. Foster - Director | Other | Common Stock | 89.57 | $53.09 | $5K | |
| Vincent D. Foster - Director | Other | Common Stock | 172.72 | $52.02 | $9K | |
| Vincent D. Foster - Director | Other | Common Stock | 203.24 | $51.01 | $10K | |
| Vincent D. Foster - Director | Other | Common Stock | 173.51 | $53.09 | $9K | |
| Vincent D. Foster - Director | Other | Common Stock | 88.72 | $52.02 | $5K | |
| Vincent D. Foster - Director | Other | Common Stock | 104.91 | $51.01 | $5K | |
| Vincent D. Foster - Director | Other | Common Stock | 89.57 | $53.09 | $5K | |
| Open-market sale | Common Stock | 6,830 | $51.73 | $353K | ||
| Brian E. Lane | Other | Common Stock | 72.31 | $50.69 | $4K | |
| Brian E. Lane | Other | Common Stock | 192.59 | $50.45 | $10K | |
| Other | Common Stock | 68.34 | $50.65 | $3K | ||
| Other | Common Stock | 64.67 | $50.69 | $3K | ||
| Jon Kevin Griffin | Other | Common Stock | 22.47 | $50.69 | $1K | |
| Jon Kevin Griffin | Other | Common Stock | 259.09 | $50.45 | $13K | |
| Ryan McHugh - Officer | Other | Common Stock | 41.3 | $50.69 | $2K | |
| Ryan McHugh - Officer | Other | Common Stock | 34.82 | $50.69 | $2K | |
| John Earl Jackson | Other | Common Stock | 98.41 | $50.69 | $5K | |
| John Earl Jackson | Other | Common Stock | 252.63 | $50.45 | $13K | |
| John Earl Jackson | Other | Common Stock | 10 | $50.49 | $505 | |
| Other | Common Stock | 108.73 | $50.45 | $5K | ||
| Other | Common Stock | 456.46 | $50.69 | $23K | ||
| Stephen B. Solcher | Other | Common Stock | 207.97 | $50.45 | $10K | |
| Other | Common Stock | 110.33 | $50.69 | $6K | ||
| Vincent D. Foster | Other | Common Stock | 14.49 | $50.69 | $734 | |
| Vincent D. Foster | Other | Common Stock | 1,548 | $50.69 | $78K | |
| Vincent D. Foster | Gift | Common Stock | 71,000 | $0.00 | - | |
| Vincent D. Foster | Gift | Common Stock | 35,500 | $0.00 | - | |
| Vincent D. Foster | Gift | Common Stock | 35,500 | $0.00 | - | |
| Other | Common Stock | 59.78 | $57.63 | $3K | ||
| Other | Common Stock | 57.87 | $56.39 | $3K | ||
| Ryan McHugh - Officer | Other | Common Stock | 36.96 | $56.39 | $2K | |
| Ryan McHugh - Officer | Other | Common Stock | 31.16 | $56.39 | $2K | |
| Brian E. Lane | Other | Common Stock | 62.11 | $56.39 | $4K | |
| Brian E. Lane | Other | Common Stock | 161.24 | $57.83 | $9K | |
| Brian E. Lane | Grant or award | Common Stock | 538 | $0.00 | - | |
| Brian E. Lane | Grant or award | Common Stock | 1,345 | $55.76 | $75K | |
| John Earl Jackson | Other | Common Stock | 85.47 | $56.39 | $5K | |
| John Earl Jackson | Other | Common Stock | 213.39 | $57.83 | $12K | |
| John Earl Jackson | Grant or award | Common Stock | 538 | $0.00 | - | |
| John Earl Jackson | Grant or award | Common Stock | 1,345 | $55.76 | $75K | |
| John Earl Jackson | Other | Common Stock | 9 | $57.38 | $516 | |
| Vincent D. Foster | Other | Common Stock | 12.97 | $56.39 | $731 | |
| Vincent D. Foster | Other | Common Stock | 1,385 | $56.39 | $78K | |
| Vincent D. Foster | Grant or award | Common Stock | 538 | $0.00 | - | |
| Other | Common Stock | 408.44 | $56.39 | $23K | ||
| Jon Kevin Griffin | Other | Common Stock | 20.1 | $56.39 | $1K | |
| Jon Kevin Griffin | Other | Common Stock | 219 | $57.83 | $13K | |
| Jon Kevin Griffin | Grant or award | Common Stock | 538 | $0.00 | - | |
| Jon Kevin Griffin | Grant or award | Common Stock | 1,345 | $55.76 | $75K | |
| Stephen B. Solcher | Other | Common Stock | 178.61 | $57.83 | $10K | |
| Stephen B. Solcher | Grant or award | Common Stock | 538 | $0.00 | - | |
| Stephen B. Solcher | Grant or award | Common Stock | 448.35 | $55.76 | $25K |
A Form 144 is notice of an INTENDED sale, not a completed one. It often precedes the Form 4 that reports the trade actually happening.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| Jesse E. Morris | Officer | 35,000 | $2.04M | View on EDGAR | |
| - | - | - | - | View on EDGAR |
Main Street Capital CORP (MAIN) had 12 insider filings in the last 90 days, with the most recent on 2026-08-24. The full record for MAIN runs to 179 Form 4 filings, the earliest from 2024-10-17. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
2 insider purchases of MAIN were filed in the last 90 days, totaling $151K.
2 insider sales of MAIN were filed in the last 90 days, totaling $2.40M.
This page tracks MAIN Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
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