---
schema_version: "secwatch.filing_event.v1"
accession: "0001396440-26-000102"
form_type: "8-K"
ticker: "MAIN"
cik: "0001396440"
company_name: "Main Street Capital CORP"
filed_at: "2026-08-11T22:20:16+00:00"
generated_at: "2026-08-12T10:05:49.973336+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Main Street Capital adds Academy, SMBC Nikko as ATM sales agents; terminates B. Riley

## Summary
- Added Academy Securities and SMBC Nikko as sales agents under ATM equity program effective Aug 11, 2026.
- Terminated equity distribution agreement with B. Riley Securities effective Aug 11, 2026.
- ATM program allows issuance of up to 20,000,000 shares of common stock; company has no obligation to sell.
- Program uses existing shelf registration (Form N-2, File No. 333-285405) and March 4, 2025 prospectus supplement.

## SEC filing metadata
- accession: 0001396440-26-000102
- form_type: 8-K
- ticker: MAIN
- cik: 0001396440
- company_name: Main Street Capital CORP
- filed_at: 2026-08-11T22:20:16+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1396440/000139644026000102/0001396440-26-000102-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1396440/000139644026000102/main-20260811.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001396440-26-000102
- JSON: https://secwatch.observer/filing/0001396440-26-000102.json
- Plain text: https://secwatch.observer/filing/0001396440-26-000102.txt

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