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Offerings // Main Street Capital CORP

MAIN offering history

Every offering-related filing in Main Street Capital CORP’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 1,006 filings back to Jul 28, 2021.

Last executed offering
Mar 31, 2026
424B2 — priced deal (shares or notes)
Last registration (announced)
None found
in filings back to Jul 28, 2021
Executed, last 12 months
4
424B pricings + 8-K 3.02 sales
Registered, last 12 months
0
S-1/S-3/F-series registrations
DateFilingWhat it means
Aug 12, 2026424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Aug 7, 2026FWP →MARKETINGFree-writing prospectus — offering being marketed
May 8, 2026FWP →MARKETINGFree-writing prospectus — offering being marketed
Mar 31, 2026424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Mar 27, 2026424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Mar 27, 2026FWP →MARKETINGFree-writing prospectus — offering being marketed
Feb 27, 2026FWP →MARKETINGFree-writing prospectus — offering being marketed
Nov 12, 2025424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Nov 7, 2025FWP →MARKETINGFree-writing prospectus — offering being marketed
Aug 14, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Aug 13, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Aug 13, 2025FWP →MARKETINGFree-writing prospectus — offering being marketed
Aug 8, 2025FWP →MARKETINGFree-writing prospectus — offering being marketed
May 9, 2025FWP →MARKETINGFree-writing prospectus — offering being marketed
Mar 5, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Mar 4, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Feb 28, 2025FWP →MARKETINGFree-writing prospectus — offering being marketed
Nov 8, 2024FWP →MARKETINGFree-writing prospectus — offering being marketed
Sep 13, 2024424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Sep 11, 2024424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Sep 11, 2024FWP →MARKETINGFree-writing prospectus — offering being marketed
Aug 12, 2024FWP →MARKETINGFree-writing prospectus — offering being marketed
May 29, 2024424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
May 28, 2024424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
May 28, 2024FWP →MARKETINGFree-writing prospectus — offering being marketed
May 13, 2024FWP →MARKETINGFree-writing prospectus — offering being marketed
Feb 26, 2024FWP →MARKETINGFree-writing prospectus — offering being marketed
Jan 11, 2024424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Jan 10, 2024424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Jan 10, 2024FWP →MARKETINGFree-writing prospectus — offering being marketed
Nov 8, 2023424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Nov 6, 2023FWP →MARKETINGFree-writing prospectus — offering being marketed
Aug 4, 2023FWP →MARKETINGFree-writing prospectus — offering being marketed
Jun 1, 2023424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
May 5, 2023FWP →MARKETINGFree-writing prospectus — offering being marketed
Feb 24, 2023FWP →MARKETINGFree-writing prospectus — offering being marketed
Nov 4, 2022FWP →MARKETINGFree-writing prospectus — offering being marketed
Nov 4, 2022FWP →MARKETINGFree-writing prospectus — offering being marketed
Aug 11, 2022424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Aug 10, 2022424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
MAIN offering-related filings from SEC EDGAR, newest first (capped at 40). Each links to the original document.

Two honest limits. (1) A 424B takedown can price shares or notes— EDGAR’s metadata doesn’t say which, so open the document: large investment-grade filers use these mostly for bond deals (no dilution), small-caps mostly for shares. (2) At-the-market (ATM) programs sell shares gradually and individual sales are not separately filed — the visible footprint is the enabling shelf and its 424B5; actual ATM share counts surface later in the 10-Q/10-K share count. Educational information from public filings, not investment advice.

Is a shelf active now? →Do they need money? →Red flags →Full MAIN workspace →
MAIN offering FAQ

When did MAIN last execute an offering?

Per SEC filings, Main Street Capital CORP's most recent priced offering document is a 424B2 filed 2026-03-31. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did MAIN last announce or register an offering?

No offering registration (S-1/S-3/F-1/F-3) appears in the filings reviewed back to 2021-07-28.

Does an offering always mean dilution?

Registered direct offerings and shelf takedowns issue new shares and dilute existing holders. Resale registrations (424B3/B7) let existing holders sell and do not create new shares. Secondary sales by insiders also do not dilute. Each row here is labeled with what it is.