PIMCO CORPORATE & INCOME STRATEGY FUND 8-K

What Happened
PIMCO Corporate & Income Strategy Fund (PCN) filed a Form 8-K on June 24, 2026 announcing changes to its investment permissions. Effective June 24, 2026, the Fund may, as a principal investment strategy, invest in and/or originate loans. Effective July 24, 2026, the Fund may invest without limitation in defaulted bonds, subject to the Fund’s other investment policies. A prospectus and SAI supplement describing these changes is attached as Exhibit 99.1.

Key Details

• Effective June 24, 2026: the Fund is permitted to principally invest in and/or originate loans.
• Effective July 24, 2026: the Fund is permitted to invest without limitation in defaulted bonds, subject to other Fund policies.
• Disclosure: a supplement to the Fund’s prospectus and statement of additional information dated June 24, 2026 is attached as Exhibit 99.1.
• Form 8-K was signed June 24, 2026 by Ryan G. Leshaw, Chief Legal Officer and Secretary.

Why It Matters
These changes expand the Fund’s investment flexibility and can affect its risk and return profile. Loans and defaulted bonds typically carry higher credit risk (and potentially higher yields) than investment-grade bonds, so the Fund may see changes in income potential, portfolio composition, and volatility. Current and prospective shareholders should review the prospectus supplement for details and consider how the updated strategy fits their risk tolerance or consult a financial advisor.