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Market Cap for Main Street Capital (MAIN)

As of · Reported

Metric

Current

$4.65B

As of Jun 15, 2026

5-Year Average

$3.89B

All-Time High

$6.03B

Aug 13, 2025

All-Time Low

$81.40M

Nov 21, 2008

Market cap daily chart for Main Street Capital (MAIN)

Jun 16, 2021 – Jun 15, 2026 · 1,255 trading days

Market Cap growth chart for Main Street Capital (MAIN) from 2007 to 2026

Latest: -13.8%

Market Cap history table for Main Street Capital (MAIN) from 2007 to 2026

  • 2026$4.65B-13.8%
  • 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 (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 $4.80B. 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 $4.65B (2026) – declined 13.8% year-over-year.

Looking at the 2021–2026 (5 years) stretch, Main Street Capital market cap compounded at +8.5% per year, with mixed annual results across the window.

Main Street Capital market cap declined from $5.40B in 2025 to $4.65B in 2026, a 13.8% drawdown.

The highest annual market cap of $5.40B was reported in 2025. The lowest in the available history was $88.87M in 2008.

Main Street Capital Market Cap by Year

Main Street Capital Market Cap 2026: $4.65B

In 2026, Main Street Capital reported market cap of $4.65B, declined 13.8% 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

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

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Main Street Capital (MAIN) Key Financials

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