Growth of $10K Avg Annual Total Return %   10 YR 5 YR 1 YR YTD Market Return -7.52% 1.33% 49.30% 51.48% Lipper Pct. Rank 67 6 74 85 NAV Return -3.98% 2.75% 69.33% 48.87% Lipper Pct. Rank 60 11 25 55 Premium/Discount History Premium/Discount 10 YR Avg 5 YR Avg YTD Avg -1.392% -13.940% -24.420%

NAV $41.32 Market Price $31.44 Net Change $0.15 Market Change -$0.01 Premium/Discount -23.92% 1 YR NAV Return 69.325% 1 YR NAV Rank 25 12-Mo Yield as of 4/30/2021 Yield Def Income Only Yield 0.00% Distribution Yield (Market) 7.32% Most Recent Income Dividend $0.120 Ex-Div Date 5/14/2021 Most Recent Cap Gain Dividend $0.361 Ex-Div Date 11/15/2018 Dividend Frequency Monthly YTD Dividends $0.480 YTD Capital Gains -- Inception Date 8/27/2007 Fund Advisor Cushing Asset Management LP Manager & Tenure Swank since 2007 Musgrave since 2020 Phone 800-662-7232 Website www.cushingmlpindex.com Total Net Assets (mil) as of 5/31/2021 $81.3 % Leveraged Assets as of 11/30/2020 23.02% Portfolio Turnover 78.00% Mgmt Fees 1.477% Expense Ratio 2.810% Fund Objective The Fund seeks to obtain a high after-tax total return from a combination of capital appreciation and current income. The Fund intends to focus its investments in MLPs with operations in the development, production, processing, refining, transportation, storage and marketing of natural resources.

Top Holdings (as of 3/31/2021) Energy Transfer LP 9.51% Enterprise Products Partners LP 9.36% Targa Resources Corp ORD 8.93% Plains GP Holdings LP ORD 8.65% Williams Companies Inc ORD 7.00% Pembina Pipeline Corp ORD 6.98% MPLX LP 6.92% Enbridge Inc ORD 5.83% ONEOK Inc ORD 5.77% Kinder Morgan Inc ORD 5.72%

Top Sectors (as of 3/31/2021) Oil & Gas 67.23% Utilities 11.28% Financials 4.21% Non Classified Equity 2.08%

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