X0303 4 2010-03-01 0000018396 CDI CORP CDI 0001158369 BALLOU ROGER H C/O CDI CORP. 1717 ARCH ST., 35TH FLOOR PHILADELPHIA PA 19103-2768 1 1 0 0 President and CEO Common Stock 2010-03-01 4 M 0 3029 14.10 A 93495 D Common Stock 2010-03-01 4 A 0 322 14.10 A 93817 D Common Stock 2010-03-01 4 F 0 1078 14.10 D 92739 D Common Stock 25100 I By Spouse Stock Purchase Plan Units 2010-03-01 4 M 0 3029 26.82 D 2010-03-01 2010-03-01 Common Stock 3029 0 D This was the closing price per share of Common Stock on the date that the Stock Purchase Plan units vested and were converted into shares of Common Stock. The price set forth in this column represents the market price of Common Stock on the date that Stock Purchase Plan units vested and therefore the date that additional shares of Common Stock relating to dividends (which accrued during the period from the date the units were acquired and the vesting date) were earned. This is the market price of Common Stock on the date that Stock Purchase Plan units owned by the Reporting Person vested and was therefore the price used to calculate the number of shares deducted to satisfy tax withholding obligations. Upon vesting, Stock Purchase Plan units convert into shares of Common Stock on a 1-for-1 basis. This was the closing price per share of Common Stock on the date that the Stock Purchase Plan units were acquired (03/01/07). Craig H. Lewis as attorney-in-fact for Roger H. Ballou (pursuant to Power of Attorney previously filed) 2010-03-03