X0201 4/A 2003-07-31 2003-07-30 0 0001079880 ONESOURCE INFORMATION SERVICES INC ones 0001239774 KAHN MARTIN F 924 WEST END AVENUE #25 NEW YORK NY 10025 1 0 0 0 Common Stock, $0.01 par value 2003-07-30 2003-07-30 4 S 0 50000 7.47 D 124642 D On July 30, 2003, the reporting person mistakenly included brokerage commissions and other costs of execution in the price, and filed a Form 4 reporting a sale of 50,000 shares of common stock at a price of $7.42/share. The reporting person sold 50,000 shares of common stock at a price of $7.47/share, excluding brokerage commissions and other costs. Martin F. Kahn 2003-07-31