Preliminary and Confidential – Subject to Further Review and Revision Management Ownership Summary (units in mm) AR Share s Ow ne d % Total S/O AM Units Ow ne d % Total S/O AM GP Share s Ow ne d % Total S/O Paul Rady - Common Glen Warren - Common Michael Kennedy - Common 16.350 10.088 0.175 5.1% 3.1 0.1 0.147 0.101 0.008 0.1% 0.1 0.0 22.397 14.931 0.028 12.0% 8.0 0.0 Paul Rady - Series B Glen Warren - Series B Michael Kennedy - Series B 0.048 0.032 0.004 48.7% 32.5 4.1 (units in mm) AR Share s Ow ne d % Total S/O AM GP Share s Ow ne d % Total S/O Paul Rady - Common Glen Warren - Common Michael Kennedy - Common 22.668 15.118 0.043 Paul Rady - Series B Glen Warren - Series B Michael Kennedy - Series B 9.006 6.004 0.751 Paul Rady - Total Glen Warren - Total Michael Kennedy - Total 16.350 10.088 0.175 5.1% 3.1 0.1 31.674 21.122 0.794 5.7% 3.8 0.1 Ante ro Entitie s M ids tre am (2) Ante ro Entitie s Ups tre am Ow ne r's Allocation $m m Ow ne rs hip (%) $m m Ow ne rs hip (%) Paul Rady Glen Warren Michael Kennedy Paul Rady Glen Warren Michael Kennedy $280.9 173.3 3.0 $280.9 173.3 3.0 42.6% 40.7 80.9 34.6% 32.9 18.5 $379.0 252.8 0.7 $529.9 353.4 13.3 57.4% 59.3 19.1 65.4% 67.1 81.5 Valuation Gap ($m m )(3) Ow ne r's Allocation to 50/50 % Allocation to SQ % Allocation Paul Rady Glen Warren Michael Kennedy $124.5 90.0 5.1 $64.2 40.9 10.2 Source: (1) (2) (3) Bloomberg, company filings, management projections, FactSet. Market data as of 9/7/2018. Assumes 1.850x exchange ratio and Series B redemption of 18.5mm shares. SA Includes AM and AMGP. Assumes value of AMGP shares sold; proceeds used to buy AR shares. 1 PF SA PF Adj. SA Total PF Share s O/S320.309552.728 Total Conve rte d Se rie s B O/S18.500 Total Com m on O/S348.019534.228 Total Se rie s B O/S0.099 Total Ne w Share s Is s ue d to Com m on(1) 348.019 Total Ne w Share s Is s ue d to Se rie s B(1) 18.500 Total Com m m on O/S320.309188.118186.209 AR AM AMGP

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