Director/PDMR Shareholding

SCHEDULE 11                                  
                                                                               
         NOTIFICATION OF INTERESTS OF DIRECTORS AND CONNECTED PERSONS          

1) Name of company

BlackRock Commodities Income Investment Trust plc

2) Name of director

Humphrey van der Klugt

3) Please state whether notification indicates that it is in respect of
holding of the shareholder named in 2 above or holding of that person's
spouse or children under the age of 18 or in respect of a non-beneficial
interest

Shareholder named above

4) Name of the registered holder(s) and, if more than one holder, the
number of shares held by each of them (if notified)

Schroder & Co Bank AG

5) Please state whether notification relates to a person(s) connected
with the Director named in 2 above and identify the connected person(s)

n/a

6) Please state the nature of the transaction.

Purchase of ordinary shares

7) Number of shares/amount of stock acquired

6,273

8) Percentage of issued class

0.007%

9) Number of shares/amount of stock disposed

n/a

10) Percentage of issued class

n/a

11) Class of security

Ordinary shares of 1p each

12) Price per share

124.31 pence

13) Date of transaction

9 August 2011

14) Date company informed

9 August 2011

15) Total holding following this notification

35,000

16) Total percentage holding of issued class following this notification

0.039%

17) Any additional information

None

18) Contact name for queries

Mrs K V Higgins

19) Contact telephone number

020 7743 1089

20) Name of authorised company official responsible for making notification

Mrs K V Higgins, BlackRock Investment Management (UK) Limited
Secretary

Date of notification: 9 August 2011