---
schema_version: "secwatch.filing_event.v1"
accession: "0001396440-26-000046"
form_type: "8-K"
ticker: "MAIN"
cik: "0001396440"
company_name: "Main Street Capital CORP"
filed_at: "2026-03-31T23:59:59+00:00"
generated_at: "2026-05-15T08:07:53.813320+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Main Street Capital issues additional $200M of 6.95% notes due 2029, total $550M outstanding

## Summary
- Issued $200M additional 6.95% notes due March 1, 2029, increasing total outstanding to $550M.
- Net proceeds of ~$202.8M to repay outstanding indebtedness, including under credit facilities.
- Notes are unsecured, rank equally with existing unsecured debt, maturing March 1, 2029.
- Interest at 6.95% payable semiannually on March 1 and September 1, starting September 1, 2026.
- Redeemable at Main Street's option at Treasury rate plus 45 bps before Feb 1, 2029, thereafter at par.

## SEC filing metadata
- accession: 0001396440-26-000046
- form_type: 8-K
- ticker: MAIN
- cik: 0001396440
- company_name: Main Street Capital CORP
- filed_at: 2026-03-31T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 1.01, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1396440/000139644026000046/0001396440-26-000046-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1396440/000139644026000046/main-20260327.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001396440-26-000046
- JSON: https://secwatch.observer/filing/0001396440-26-000046.json
- Plain text: https://secwatch.observer/filing/0001396440-26-000046.txt

## Source-grounded claims
- claim_id: 18bd7ba35e4bf18ebe997d0f8139dc6050e1a914
  claim: Main Street Capital CORP incurred senior notes of $200,000,000 with The Bank of New York Mellon Trust Company, N.A. at 6.95% maturing March 1, 2029.
  evidence_excerpt: On March 27, 2026, Main Street Capital Corporation (“Main Street”) entered into an underwriting agreement (the “Underwriting Agreement”) by and between Main Street and RBC Capital Markets, LLC, as representative of the underwriters named on Schedule A thereto, in connection with the issuance and sale of an additional $200,000,000 in aggregate principal amount (the “Offering”) of Main Street’s 6.95% notes due 2029 (the “New Notes”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1396440/000139644026000046/0001396440-26-000046-index.htm
- claim_id: c7a1af3dc2c03830896d31f5e38c83c3fb35493d
  claim: Main Street Capital CORP entered into Underwriting Agreement with RBC Capital Markets, LLC, as representative of the underwriters named on Schedule A thereto valued at $200,000,000 (effective 2026-03-27).
  evidence_excerpt: On March 27, 2026 , Main Street Capital Corporation (“Main Street”) entered into an underwriting agreement (the “Underwriting Agreement”) by and between Main Street and RBC Capital Markets, LLC, as representative of the underwriters named on Schedule A thereto, in connection with the issuance and sale of an additional $200,000,000 in aggregate principal amount (the “Offering”) of Main Street’s 6.95% notes due 2029 (the “New Notes”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1396440/000139644026000046/0001396440-26-000046-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.