Net Asset Value(s)

NET ASSET VALUE BLACKROCK NORTH AMERICAN INCOME TRUST PLC549300WWOCXSC241W468 The unaudited net asset values for BlackRock North American Income Trust plc atclose of business on 23 May 2018 were: 172.61p Capital only174.36p Including current year income Notes: 1. Investments have been valued on a bid price basis. 2. Revenue items included in net asset value, with dividends payablededucted on the ex-dividend date. 3. Following the buyback of 75,000 ordinary shares on 14 June 2017, theCompany has 68,874,044 ordinary shares in issue, excluding 31,487,261 which areheld in treasury.