X0202 4 2004-05-01 0000018396 CDI CORP CDI 0001216451 BLANKLEY WALTER E C/O CDI CORP. 1717 ARCH ST., 35TH FLOOR PHILADELPHIA PA 19103 1 0 0 0 Common Stock 2004-05-01 4 M 0 4953 A 8054 D Common Stock 1000 I Shares held by a trust (Reporting Person is beneficiary and his son is trustee) Stock Purchase Plan Units 2004-05-01 4 M 0 4953 14.71 D 2004-05-01 2004-05-01 Common Stock 4953 0 D This transaction involves the vesting of Stock Purchase Plan units. No price is paid upon vesting. The units themselves were acquired in lieu of cash retainer fees for directors. 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 05/01/01, at which time the Stock Purchase Plan units were acquired. Walter E. Blankley 2004-05-03