---
schema_version: "secwatch.filing_event.v1"
accession: "0001396440-25-000151"
form_type: "8-K"
ticker: "MAIN"
cik: "0001396440"
company_name: "Main Street Capital CORP"
filed_at: "2025-08-15T23:59:59+00:00"
generated_at: "2026-05-17T12:21:52.435900+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Main Street Capital issues $350M of 5.40% notes due 2028 to repay debt

## Summary
- Issued $350M aggregate principal of 5.40% notes due August 15, 2028; priced at par.
- Net proceeds of ~$347.7M after underwriting discounts and expenses.
- Initial use to repay outstanding indebtedness, including credit facilities.
- Notes are unsecured, rank equally with existing unsecured debt, subordinated to secured debt.
- Redemption before July 15, 2028 at Treasury Rate plus 30 bps; after that at par.

## SEC filing metadata
- accession: 0001396440-25-000151
- form_type: 8-K
- ticker: MAIN
- cik: 0001396440
- company_name: Main Street Capital CORP
- filed_at: 2025-08-15T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1396440/000139644025000151/0001396440-25-000151-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1396440/000139644025000151/main-20250813.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001396440-25-000151
- JSON: https://secwatch.observer/filing/0001396440-25-000151.json
- Plain text: https://secwatch.observer/filing/0001396440-25-000151.txt

## Key facts
- Debt Financings
  Main Street Capital CORP incurred senior notes of $350.0 million in aggregate principal amount with J.P. Morgan Securities LLC, as representative of the underwriters at 5.40% maturing August 15, 2028.
  - Instrument: senior notes
  - Principal: $350.0 million in aggregate principal amount
  - Counterparty: J.P. Morgan Securities LLC, as representative of the underwriters
  - Rate: 5.40%
  - Maturity: August 15, 2028
  - Event: incurrence
  source text: the issuance and sale of $350.0 million in aggregate principal amount (the “Offering”) of Main Street’s 5.40% notes due 2028 (the “Notes”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1396440/000139644025000151/0001396440-25-000151-index.htm

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