Market Cap for Main Street Capital (MAIN)
According to Main Street Capital's latest reported financial statements, the company's latest reported market cap is $5.43B USD. 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 .
Currently viewingMarket CapSwitch metric
Latest period
$5.43B
YoY change
-11.0%
5Y CAGR
+9.2%
Peak year (2025)
$5.40B
Latest annual
$4.80B
Market Cap history chart for Main Street Capital (MAIN) from 2007 to 2026
Market Cap history table for Main Street Capital (MAIN) from 2007 to 2026
| Fiscal year | Period ended | Reported | Market Cap | YoY |
|---|---|---|---|---|
| 2026 | $4.80B | -11.0% | ||
| 2025 | $5.40B | +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 | $1.20B | +32.8% | ||
| 2012 | $901.27M | +85.7% | ||
| 2011 | $485.33M | +63.8% | ||
| 2010 | $296.37M | +83.1% | ||
| 2009 | $161.89M | +82.2% | ||
| 2008 | $88.87M | -26.1% | ||
| 2007 | $120.32M | — |
Market Cap values are taken from Main Street Capital's reported income statements (10-Q quarterly and 10-K annual filings with the U.S. Securities and Exchange Commission). Each row shows the period end date and the date the filing was reported; YoY compares each figure to the same period one year earlier. Amounts are in USD as filed.
Analysis
Main Street Capital (MAIN) most recent annual market cap stands at $4.80B (2026) – declined 11.0% year-over-year.
Looking at the 2021–2026 (5 years) stretch, Main Street Capital market cap compounded at +9.2% per year, with the latest reading among the more recent periods of the dataset.
Main Street Capital market cap declined from $5.40B in 2025 to $4.80B in 2026, a 11.0% drawdown.
The highest annual market cap of $5.40B was reported in 2025. The lowest in the available history was $88.87M in 2008.
Within Financial Services, Main Street Capital (MAIN) ranks 9th among 8 peers we track. The peer median for market cap is $413.64B.
Main Street Capital Market Cap by Year
Main Street Capital Market Cap 2026: $4.80B
Main Street Capital market cap in 2026 was $4.80B, declined 11.0% below 2025.
Main Street Capital Market Cap 2025: $5.40B
Main Street Capital market cap in 2025 was $5.40B, 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
Main Street Capital market cap in 2024 was $5.19B, surged 46.5% from 2023.
Main Street Capital Market Cap 2023: $3.54B
Main Street Capital market cap in 2023 was $3.54B, 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 — Market Cap
Companies in the same sector as Main Street Capital, ranked by their latest market cap.
| Company | Market Cap | Sector |
|---|---|---|
| Berkshire Hathaway Inc. (BRK-B) | $1.03T | Financial Services |
| JPMorgan Chase & Co. (JPM) | $839.99B | Financial Services |
| Visa Inc. (V) | $596.34B | Financial Services |
| Mastercard Incorporated (MA) | $449.35B | Financial Services |
| Bank of America Corporation (BAC) | $377.92B | Financial Services |
| Morgan Stanley (MS) | $302.29B | Financial Services |
| The Goldman Sachs Group, Inc. (GS) | $274.96B | Financial Services |
| Wells Fargo & Company (WFC) | $249.74B | Financial Services |
Frequently asked questions
What is Main Street Capital's market cap?
- Latest reported market cap for Main Street Capital (MAIN) is $5.43B (period ending December 31, 2025).
How has Main Street Capital market cap changed year-over-year?
- Main Street Capital (MAIN) market cap changed -11.0% year-over-year on the latest annual filing.
What is the long-term growth rate of Main Street Capital market cap?
- Main Street Capital (MAIN) market cap compound annual growth rate is +9.2% over the most recent 5 years available.
When did Main Street Capital market cap hit its highest annual value?
- Main Street Capital market cap reached its highest annual value of $5.40B in 2025.
What was Main Street Capital market cap in 2025?
- Main Street Capital (MAIN) market cap in 2025 was $5.40B.
What was Main Street Capital market cap in 2026?
- Main Street Capital (MAIN) market cap in 2026 was $4.80B.
Metrics overview
Pick a metric for charts, filings, and peers — each row shows the latest TTM or annual value with year-over-year change.
Explore more
MAIN Overview
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MAIN Dividend Calculator
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MAIN Dividend Forecast
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