X0306 4 2018-08-09 0 0001051003 BLACKROCK DEBT STRATEGIES FUND, INC. DSU 0001464011 Garfin Mitchell 55 EAST 52ND STREET NEW YORK NY 10055 0 0 0 1 Portfolio Manager Common Stock 2018-08-09 4 S 0 5000 11.29 D 0 D This transaction was executed in multiple trades at prices ranging from $11.2865 to $11.29. The price reported reflects the weighted average price. The reporting person hereby undertakes to provide full information regarding the number of shares and prices at which the transactions were effected upon request to the SEC staff, the issuer, or a security holder of the issuer. /s/ Eugene Drozdetski as Attorney-in-Fact 2018-08-10