---
schema_version: "secwatch.filing_event.v1"
accession: "0001396440-23-000073"
form_type: "8-K"
ticker: "MAIN"
cik: "0001396440"
company_name: "Main Street Capital CORP"
filed_at: "2023-06-01T23:59:59+00:00"
generated_at: "2026-06-14T09:11:03.893277+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# Main Street Capital adds B. Riley as ATM sales agent, terminates SMBC Nikko

## Summary
- Entered equity distribution agreement with B. Riley Securities as additional Sales Agent under existing ATM program.
- Terminated equity distribution agreement with SMBC Nikko Securities, effective May 31, 2023.
- ATM program remains unchanged: up to 15,000,000 shares of common stock may be issued and sold.

## SEC filing metadata
- accession: 0001396440-23-000073
- form_type: 8-K
- ticker: MAIN
- cik: 0001396440
- company_name: Main Street Capital CORP
- filed_at: 2023-06-01T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 1.01, 1.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1396440/000139644023000073/0001396440-23-000073-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1396440/000139644023000073/main-20230531.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001396440-23-000073
- JSON: https://secwatch.observer/filing/0001396440-23-000073.json
- Plain text: https://secwatch.observer/filing/0001396440-23-000073.txt

## Key facts
- Material Agreements
  Main Street Capital CORP entered into B. Riley Equity Distribution Agreement with B. Riley Securities, Inc. valued at up to 15,000,000 shares (effective 2023-06-01).
  - Action: entry
  - Agreement: atm program
  - Counterparty: B. Riley Securities, Inc.
  - Value: up to 15,000,000 shares
  - Effective: 2023-06-01
  source text: On June 1, 2023, Main Street Capital Corporation (“Main Street”) entered into an equity distribution agreement (the “B. Riley Equity Distribution Agreement”) with B. Riley Securities, Inc. (“B. Riley”) on substantially the same terms as Main Street’s equity distribution agreements, each dated March 3, 2022 (together with the B. Riley Equity Distribution Agreement, the “Equity Distribution Agreements”), entered into with each of Truist Securities, Inc., RBC Capital Markets, LLC, Raymond James & Associates, Inc., and Comerica Securities, Inc. (collectively, together with B. Riley, the “Sales Agents”) for the purpose of adding B. Riley as an additional Sales Agent under Main Street’s existing “at the market” program equity offering.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1396440/000139644023000073/0001396440-23-000073-index.htm
- Material Agreements
  Main Street Capital CORP terminated Equity Distribution Agreement, dated March 3, 2022 with SMBC Nikko Securities America, Inc. (effective 2023-05-31).
  - Action: termination
  - Agreement: atm program
  - Counterparty: SMBC Nikko Securities America, Inc.
  - Effective: 2023-05-31
  source text: Also, effective May 31, 2023, Main Street and SMBC Nikko Securities America, Inc. (“SMBC”) agreed to terminate the equity distribution agreement, dated March 3, 2022, between Main Street and SMBC.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1396440/000139644023000073/0001396440-23-000073-index.htm

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