Current
$4.92B
5-Year Average
$3.94B
All-Time High
$6.03B
All-Time Low
$81.4M
Market cap daily chart for Main Street Capital (MAIN)
Aug 2, 2021 – Jul 29, 2026 · 1,253 trading days
Market Cap growth chart for Main Street Capital (MAIN) from 2017 to 2026
Latest: -8.8%
Market Cap history table for Main Street Capital (MAIN) from 2007 to 2026
| 2026 | $4.92B | -8.8% | -$472M | ||
| 2025 | $5.4B | +4.0% | +$209M | ||
| 2024 | $5.19B | +46.5% | +$1.65B | ||
| 2023 | $3.54B | +28.7% | +$789M | ||
| 2022 | $2.75B | -11.0% | -$341M | ||
| 2021 | $3.09B | +45.9% | +$974M | ||
| 2020 | $2.12B | -21.9% | -$595M | ||
| 2019 | $2.71B | +33.4% | +$680M | ||
| 2018 | $2.03B | -9.7% | -$218M | ||
| 2017 | $2.25B | +17.7% | +$339M | ||
| 2016 | $1.91B | +34.1% | +$486M | ||
| 2015 | $1.43B | +12.1% | +$154M | ||
| 2014 | $1.27B | +6.3% | +$75.5M | ||
| 2013 | $1.2B | +32.8% | +$296M | ||
| 2012 | $901M | +85.7% | +$416M | ||
| 2011 | $485M | +63.8% | +$189M | ||
| 2010 | $296M | +83.1% | +$134M | ||
| 2009 | $162M | +82.2% | +$73M | ||
| 2008 | $88.9M | -26.1% | -$31.4M | ||
| 2007 | $120M | — | — |
- 2026$4.92B-8.8%
- 2025$5.4B+4.0%
- 2024$5.19B+46.5%
- 2023$3.54B+28.7%
- 2022$2.75B-11.0%
- 2021$3.09B+45.9%
- 2020$2.12B-21.9%
- 2019$2.71B+33.4%
- 2018$2.03B-9.7%
- 2017$2.25B+17.7%
- 2016$1.91B+34.1%
- 2015$1.43B+12.1%
- 2014$1.27B+6.3%
- 2013$1.2B+32.8%
- 2012$901M+85.7%
- 2011$485M+63.8%
- 2010$296M+83.1%
- 2009$162M+82.2%
- 2008$88.9M-26.1%
- 2007$120M—
Market Cap values are taken from Main Street Capital's reported income statements (share counts) and end-of-day prices (quarterly 10-Q and annual 10-K filings with the U.S. Securities and Exchange Commission). Each row shows the period end date and the filing date. YoY compares each figure to the same period one year earlier. Amounts are in USD as filed.
About Market Cap at Main Street Capital (MAIN)
According to Main Street Capital's latest reported financial statements, the company's latest reported market cap is $4.8B. Market capitalization is the total dollar value of all outstanding shares — shares outstanding × stock price — and the standard measure of a company's equity value. On this page, historical market cap snaps filing-period share counts to closing prices on or before each statement date (not intraday tick data).
Headline figure above is from the reporting period ending (reported ). Chart and table below cover the full reported history back to .
Main Street Capital (MAIN) most recent annual market cap stands at $4.92B (2026) – declined 8.8% year-over-year.
Looking at the 2021–2026 (5 years) stretch, Main Street Capital market cap compounded at +9.7% per year, with mixed annual results across the window.
Main Street Capital market cap declined from $5.4B in 2025 to $4.92B in 2026, a 8.8% drawdown.
The highest annual market cap of $5.4B was reported in 2025. The lowest in the available history was $88.9M in 2008.
Main Street Capital Market Cap by Year
Main Street Capital Market Cap 2026: $4.92B
In 2026, Main Street Capital reported market cap of $4.92B, declined 8.8% below 2025.
Main Street Capital Market Cap 2025: $5.4B
Main Street Capital market cap in 2025 was $5.4B, edged up 4.0% from 2024. This figure represents the highest annual value in the available history.
Main Street Capital Market Cap 2024: $5.19B
2024's market cap for Main Street Capital came in at $5.19B, surged 46.5% from 2023.
Main Street Capital Market Cap 2023: $3.54B
Main Street Capital posted market cap of $3.54B in 2023, grew 28.7% from 2022.
Main Street Capital Market Cap 2022: $2.75B
Main Street Capital market cap in 2022 was $2.75B.
See more financial history for Main Street Capital (MAIN).
Sector peers by Market Cap
Financial Services peers of Main Street Capital (MAIN), ranked by their latest market cap
| $1.1T | |
| $924B | |
| $677B | |
| $498B | |
| $433B | |
| $320B | |
| $289B | |
| $257B |
- $924B
- $677B
- $498B
- $320B
- $289B
- $257B
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Main Street Capital (MAIN) Key Financials
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