X0202 SCHEDULE 13G/A 0000950144-09-001012 0001114446 XXXXXXXX LIVE 7 Auction Preferred Stock 05/29/2026 0001070732 Eaton Vance Senior Income Trust 27826S202 27826S301 ONE POST OFFICE SQUARE ONE POST OFFICE SQUARE BOSTON MA 02109 Rule 13d-1(b) UBS AG V8 0.00 0.00 0.00 0.0 BK Eaton Vance Senior Income Trust ONE POST OFFICE SQUARE, ONE POST OFFICE SQUARE, BOSTON, MASSACHUSETTS, 02109. UBS AG Bahnhofstrasse 45 PO Box CH-8021, Zurich, Switzerland Switzerland N BK 0 0 0 0 Y Y N This statement on Schedule 13G is being filed by UBS Group AG on behalf of itself and its wholly owned subsidiaries UBS Financial Services Inc. and UBS Securities LLC. Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. UBS AG /s/ Andrew Johnson 05/29/2026 /s/ Dmitriy Kogan 05/29/2026