Main Street Capital
Market cap
$5.323 B
$56.92 -1.22%
Close of 6 Nov 2026
As of 6 Nov 2026, Main Street Capital (MAIN) has a market capitalization of $5.32B. Market cap measures the value of outstanding equity at market prices; company totals combine applicable share classes. Prices and market caps come from Nasdaq, with financial fundamentals from SEC filings. See sources and calculation details.
Revenue
—
Not reported
Earnings
$493.4M
#616 by earnings
Shares outstanding
93,846,603
Latest filing cover page
P/E ratio
10.8
Cap ÷ net income
Finance/Investors Services, ranked by market cap
All 37 →- #1Central SecuritiesCET$13.3B
- #2Main Street CapitalMAIN$5.32B
- #3HA Sustainable Infrastructure CapitalHASI$5.11B
- #4Kayne Anderson Energy Infrastructure FundKYN$1.79B
- #5BlackRock Capital Allocation Term TrustBCAT$1.44B
What if Main Street Capital were worth as much as…
Open the what-if tool →Where these numbers come from
Share counts and financials for Main Street Capital are taken from its own SEC filings via EDGAR: public record, not an estimate. Market cap is shares outstanding multiplied by the latest close. Read the methodology.