X0306 4 2016-04-28 0 0001434728 Global Water Resources, Inc. GWRS 0001673037 Hill Trevor T C/O GLOBAL WATER RESOURCES, INC. 21410 N 19TH AVENUE #220 PHOENIX AZ 85027 1 0 1 0 Common Stock 2016-04-28 4 P 0 20000 6.41 A 2040115 D The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $6.40 to $6.50, inclusive. The reporting person undertakes to provide to Global Water Resources, Inc. (the "Company"), any of its security holders or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote (1) to this Form 4. On April 28 2016, the Company effected a 100.68-for-1 forward stock split of its common stock. The number of shares reported has been adjusted to reflect the stock split. /s/ Joanne Ellsworth, attorney-in-fact 2016-05-02