Golub Capital BDC, Inc. Portfolio Composition as of June 30, 2023

Golub Capital BDC, Inc. (“we” or “us”) seeks to create a portfolio that includes primarily one stop and other senior secured loans by investing approximately $10 to $80 million of capital, on average, in the securities of middle-market companies. We may also selectively invest more than $80 million in some of our portfolio companies and generally expect that the size of our individual investments will vary proportionately with the size of our capital base.

As of June 30, 2023, we had debt and equity investments in 333 portfolio companies, with a fair value totaling $5,525 million.

Portfolio Composition by Seniority – as of June 30, 20231

2023_Q3_PortfolioCompDiversificationIndustry Chart

Junior debt is comprised of subordinated debt and second lien loans.

Diversification by Industry – as of June 30, 20231

2023 Q3 Portfolio Comp Diversification Industry Chart

Based on S&P 2018 industry code. The ten largest industries represented as a percentage of the portfolio at fair value are labeled. All other industry segments are each below 3%.

1. We have based the statements included in this presentation on information available to us on the date of this presentation, and we assume no obligation to update any such statements. Future results could differ materially from historical performance. Although we undertake no obligation to revise or update any of these statements, whether as a result of new information, future events or otherwise, you are advised to consult any additional disclosures that we may make directly to you or through reports that we have filed or in the future may file with the Securities and Exchange Commission (“SEC”), including annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K.

This presentation contains statistics and other data that have been obtained from or compiled from information made available by third-party service providers. We have not independently verified such statistics or data.