N-MFP2 0000893818 XXXXXXXX 2019-02-28 0000893818 5493008LW2651I1QB503 S000004275 7 N N 033-54126 BlackRock Fund Advisors 801-22609 PricewaterhouseCoopers New York NY BlackRock Institutional Trust Company, N.A. State Street 0001145958 085-11329 Y 0000915092 Money Market Master Portfolio S000004283 N N Prime N 1 1 15229825483.09 13618592908.38 15933028103.19 12422321727.17 21850194838.90 21134087844.48 21343554339.37 22002732200.21 0.00 0.3294 0.2892 0.3403 0.2555 0.4725 0.4488 0.4559 0.4526 0.0000 0.00 49032621981.90 0.00 1754.06 94373758.23 48938249977.73 48918897879.2200 0.0000 0.0274 1.0003 1.0003 1.0003 1.0003 0.0000 C000011988 500000.00 1.00 1.0000 1.0000 1.0000 1.0000 1.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0000 N C000011989 100000000.00 1.00 1.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0000 N C000011990 10000000.00 1.00 1.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0000 N C000011991 1000000.00 1.00 1.0000 1.0000 1.0000 1.0000 1.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0000 N C000011992 100000.00 1.00 1.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0000 N C000060671 25000000.00 1.00 1.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0000 N C000074119 1.00 48938249971.76 48918897873.2200 1.0003 1.0003 1.0003 1.0003 0.0000 3746737683.60 6148806292.42 4298674286.09 3892785680.47 3452191016.84 3425699668.73 3877273743.21 2531452969.78 0.00 0.00 17884516590.76 14670338367.31 0.0265 Y BlackRock Advisors, LLC: Advisor Fee- $840 Money Market Master Portfolio Money Market Master Portfolio 0.000000% 0000915092 Investment Company Y 2019-03-01 2019-03-01 2019-03-01 N N N 0.0000 49032621981.90 49032621981.90 1.0000 N Y Y N BlackRock Funds III 2019-03-07 /s/ Neal J. Andrews Neal J. Andrews Chief Financial Officer