X0609 4 2026-09-15 0001070732 Eaton Vance Senior Income Trust EVF 0000895421 MORGAN STANLEY false 1585 BROADWAY NEW YORK NY 10036 true See Remarks false Auction Preferred Stock 2026-09-15 4 J 0 94 D 0 I By Subsidiary The preferred shares reported herein represent the Reporting Person's combined holdings in multiple series of auction preferred securities of the Issuer, which are treated herein as one class of securities in accordance with the Auction Rate Securities - Global Exemptive Relief no-action letter issued by the Securities and Exchange Commission on September 22, 2008. The Reporting Person is an affiliate of the Issuer's investment adviser. The reported securities were disposed of pursuant to a mandatory redemption by the Issuer, at liquidation preference of $25,000 plus any accumulated but unpaid dividends through September 15, 2026. In this regard, the Reporting Person disposed of shares of Series A and Series B Auction Preferred Stock, which were redeemed at $25,012.175 and $25,008.161111, respectively, due to slight differences in the accrued dividends. Investment adviser affiliate and former 10% Owner Morgan Stanley, By: /s/ Joseph Maehr, Authorized Signatory 2026-09-17