---
schema_version: "secwatch.filing_event.v1"
accession: "0001396440-26-000106"
form_type: "8-K"
ticker: "MAIN"
cik: "0001396440"
company_name: "Main Street Capital CORP"
filed_at: "2026-10-15T13:34:33+00:00"
generated_at: "2026-10-15T13:35:08.265726+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Main Street Capital sees Q3 2026 NAV of $34.18-$34.26, up 0.8-1.0%; DNII before taxes $0.96-$1.00

## Summary
- Preliminary Q3 2026 NII estimated at $0.87-$0.91/share; distributable NII $0.94-$0.98/share and DNII before taxes $0.96-$1.00/share, described as in line with prior guidance.
- Estimated NAV/share of $34.18-$34.26 as of Sept 30, 2026, up $0.26-$0.34 (0.8%-1.0%) from $33.92 on June 30, after a $0.30/share supplemental dividend; 17th straight quarterly NAV increase.
- Annualized ROE over 14% for Q3 2026; non-accrual investments were 0.9% of the portfolio at fair value and 3.5% at cost as of Sept 30, 2026.
- SBIC borrowing capacity: SBA approved a $75.0M increase to $250.0M for Main Street Mezzanine Fund; combined with Main Street Capital III, access to $425.0M of the $475.0M regulatory maximum.
- Q3 LMM investments totaled $61.5M (net cost basis -$19.4M); private loan investments $162.0M (net cost basis -$1.8M). Full Q3 results Nov 5, 2026; call Nov 6 at 10 a.m. ET.

## SEC filing metadata
- accession: 0001396440-26-000106
- form_type: 8-K
- ticker: MAIN
- cik: 0001396440
- company_name: Main Street Capital CORP
- filed_at: 2026-10-15T13:34:33+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1396440/000139644026000106/0001396440-26-000106-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1396440/000139644026000106/main-20261015.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001396440-26-000106
- JSON: https://secwatch.observer/filing/0001396440-26-000106.json
- Plain text: https://secwatch.observer/filing/0001396440-26-000106.txt

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