N-MFP3 0001060517 XXXXXXXX 2026-06-30 UBS Series Funds 0001060517 54930058UKPXVB81RJ71 UBS Select Government Preferred Fund 549300TPU9BIV8MJY882 S000053132 1 N N 333-52965 UBS ASSET MANAGEMENT (AMERICAS) LLC 801-34910 Ernst & Young LLP New York NY UBS ASSET MANAGEMENT (AMERICAS) LLC BNY Mellon Investment Servicing (US) Inc. 0000849542 084-01761 Y 0001403166 Government Master Fund S000054189 N N Government N N 1 1 12855044637.41 15989661012.71 0.5279 0.6566 2026-06-01 12750098507.16 15885033734.48 0.5258 0.6551 2026-06-02 13241006996.35 16376237257.41 0.5352 0.6619 2026-06-03 12585511542.37 15895977902.57 0.5226 0.6600 2026-06-04 12545217540.13 15977260088.87 0.5200 0.6623 2026-06-05 12533167596.81 16442142625.32 0.5190 0.6809 2026-06-08 12086900331.60 15996282762.17 0.5074 0.6715 2026-06-09 12273374176.24 15969184615.65 0.5133 0.6679 2026-06-10 11783816666.80 15352965995.27 0.5059 0.6591 2026-06-11 11693448049.16 15394886453.08 0.5038 0.6633 2026-06-12 12305024661.13 16490603942.34 0.5166 0.6923 2026-06-15 12230786476.45 16416743299.72 0.5151 0.6914 2026-06-16 12283509039.37 16340923544.53 0.5189 0.6903 2026-06-17 11335742892.29 15261378311.84 0.5017 0.6754 2026-06-18 11790827867.59 16321194209.09 0.5115 0.7081 2026-06-22 11843944060.45 16374734676.89 0.5088 0.7034 2026-06-23 11516493301.09 16047708786.91 0.5017 0.6991 2026-06-24 11552675753.52 16155115295.45 0.5054 0.7068 2026-06-25 11731932287.11 16207720903.58 0.5120 0.7074 2026-06-26 12319497177.49 16796589206.46 0.5242 0.7148 2026-06-29 11473744456.90 15951293306.12 0.5065 0.7041 2026-06-30 0.00 11642158712.38 0.00 0.00 33697967.40 11608460744.98 11608121091.6700 Y 1.0000 0.0368 2026-06-01 0.0368 2026-06-02 0.0368 2026-06-03 0.0368 2026-06-04 0.0368 2026-06-05 0.0368 2026-06-08 0.0368 2026-06-09 0.0368 2026-06-10 0.0368 2026-06-11 0.0368 2026-06-12 0.0369 2026-06-15 0.0369 2026-06-16 0.0369 2026-06-17 0.0370 2026-06-18 0.0370 2026-06-22 0.0369 2026-06-23 0.0370 2026-06-24 0.0370 2026-06-25 0.0370 2026-06-26 0.0370 2026-06-29 0.0370 2026-06-30 1.0000 2026-06-01 1.0000 2026-06-02 1.0000 2026-06-03 1.0000 2026-06-04 0.9999 2026-06-05 0.9999 2026-06-08 1.0000 2026-06-09 1.0000 2026-06-10 1.0000 2026-06-11 0.9999 2026-06-12 1.0000 2026-06-15 1.0000 2026-06-16 0.9999 2026-06-17 0.9998 2026-06-18 0.9999 2026-06-22 0.9999 2026-06-23 0.9999 2026-06-24 0.9999 2026-06-25 0.9999 2026-06-26 0.9999 2026-06-29 0.9999 2026-06-30 N N Basis A C000167200 50000000.00 11608460744.98 11608121091.6700 1.0000 2026-06-01 1.0000 2026-06-02 1.0000 2026-06-03 1.0000 2026-06-04 0.9999 2026-06-05 0.9999 2026-06-08 1.0000 2026-06-09 1.0000 2026-06-10 1.0000 2026-06-11 0.9999 2026-06-12 1.0000 2026-06-15 1.0000 2026-06-16 0.9999 2026-06-17 0.9998 2026-06-18 0.9999 2026-06-22 0.9999 2026-06-23 0.9999 2026-06-24 0.9999 2026-06-25 0.9999 2026-06-26 0.9999 2026-06-29 0.9999 2026-06-30 646071460.52 194134044.54 2026-06-01 180221659.84 190049115.79 2026-06-02 154218523.66 142452468.32 2026-06-03 51858041.29 254173299.86 2026-06-04 73602680.05 65367088.32 2026-06-05 116848555.80 790681053.24 2026-06-08 47423962.09 223802638.04 2026-06-09 101598749.02 221453148.64 2026-06-10 234872454.16 75943278.83 2026-06-11 142709101.99 164591213.84 2026-06-12 651028462.37 484371835.03 2026-06-15 59739376.55 140278474.93 2026-06-16 294433495.77 56933790.74 2026-06-17 81551651.72 680534447.17 2026-06-18 146488627.74 133076490.61 2026-06-22 173571539.46 146911605.98 2026-06-23 156033567.65 216101473.98 2026-06-24 457070303.28 147519680.21 2026-06-25 226630243.81 114999851.17 2026-06-26 393371485.42 199911560.15 2026-06-29 140743242.66 756232060.32 2026-06-30 4530087184.85 5399518619.71 0.0354 2026-06-01 0.0354 2026-06-02 0.0354 2026-06-03 0.0354 2026-06-04 0.0354 2026-06-05 0.0354 2026-06-08 0.0354 2026-06-09 0.0354 2026-06-10 0.0354 2026-06-11 0.0354 2026-06-12 0.0355 2026-06-15 0.0355 2026-06-16 0.0355 2026-06-17 0.0356 2026-06-18 0.0356 2026-06-22 0.0355 2026-06-23 0.0356 2026-06-24 0.0356 2026-06-25 0.0356 2026-06-26 0.0356 2026-06-29 0.0356 2026-06-30 Y 397431.00 Other IND FID AS EXEC 0.1111 0.00 N Government Master Fund Government Master Fund 976WHL907 54930015XY4J2ENG8G36 0001403166 976WHL907 Investment Company Y 2026-07-01 2026-07-01 2026-07-01 N N N 0.0000 11642158712.38 11642158712.38 1.0000 N Y Y N The master-feeder funds are parties to a written daily liquidity agreement; consistent with SEC staff interpretative guidance, ownership interests in the master fund are categorized as a Daily Liquid Asset/Weekly Liquid Asset by the feeder funds. UBS Series Funds 2026-07-08 /s/Rose Ann Bubloski Rose Ann Bubloski Vice President