Insurance Auto Auctions, Inc Watch

from SC 13D/A 1 page Schedule II Information With Respect to Transactions Effected During the Past Sixty Days or Since the Most Recent Filing on Schedule 13d (1) Shares Purchased Average Date Sold(-) Price(2) Common Stock-Insurance Auto Auction Gabelli Securities Inc. Gabelli Associates Ltd 5/25/05 128,177- 28.2500 Gabelli Associates Fund II 5/25/05 5,000- 28.2500 Gabelli Associates Fund 5/25/05 117,254- 28.2500 Mjg Associates Gabelli Performance Partnership 5/25/05 5,000- 28.2500 Gamco Investors, Inc. 5/25/05 528,441- 28.2500 Gabelli Funds, LLC. Woodland Small Cap Value Fund 5/25/05 5,120- 28.2500 Gabelli Dividend & Income Trust 5/25/05 52,200- 28.2500 Gabelli Abc Fund 5/25/05 140,000- 28.2500 Global Utility Income Trust 5/25/05 3,000- 28.2500 (1) the Transactions on 5/25/05 Were in Connection With the Acquisition Described in Item 5 of This Amendment to Schedule 13d. (2) Price Excludes Commission

from SC 13D/A 1 page Schedule II Information With Respect to Transactions Effected During the Past Sixty Days or Since the Most Recent Filing on Schedule 13d (1) Shares Purchased Average Date Sold(-) Price(2) Common Stock-Insurance Auto Auction Gamco Investors, Inc. 5/19/05 11,400 28.1788 5/18/05 2,865- 28.2607 5/13/05 2,710- 28.1700 5/13/05 2,500 28.1500 5/13/05 4,070- 28.1753 5/12/05 4,040- 28.1500 5/12/05 4,040- 28.1510 5/12/05 1,400 28.1500 5/12/05 1,500 28.1528 5/04/05 500 28.1098 5/03/05 4,000 28.0909 5/02/05 1,200 28.0992 4/28/05 1,300 28.0128 4/28/05 2,000 28.0000 4/27/05 3,000 27.9996 4/26/05 4,200 27.9700 4/08/05 5,000 27.9500 4/08/05 520- 27.8477 4/04/05 1,000- *Do 3/29/05 1,000 27.8800 3/23/05 10,000 27.9001 Mjg Associates, Inc. Gabelli Fund, Ldc 5/18/05 2,500- 28.2607 Gabelli Securities, Inc. Gabelli Associates Fund II 5/19/05 1,000 28.1788 4/28/05 500 28.0000 4/27/05 500 28.0100 Gabelli Associates Fund 5/19/05 7,600 28.1788 5/19/05 5,500 28.1845 5/17/05 2,500- 28.2600 5/16/05 2,200- 28.2500 5/13/05 1,200 28.1500 5/12/05 1,800 28.1500 5/12/05 3,223 28.1528 5/06/05 698 28.1100 5/06/05 2,100- 28.2780 5/04/05 1,700 28.1098 5/03/05 1,891 28.0909 4/29/05 1,000 28.0334 4/28/05 4,000 28.0128 4/27/05 2,200 27.9996 4/26/05 3,600 27.9700 Gabelli Associates Ltd 5/19/05 500- 28.2600 5/19/05 14,900 28.1845 5/17/05 3,106- 28.2600 5/16/05 2,219- 28.2500 5/13/05 1,300 28.1500 5/12/05 2,400 28.1528 5/12/05 2,022 28.1500 5/11/05 1,407 28.1500 5/06/05 2,400- 28.2780 5/04/05 1,016 28.1098 5/03/05 1,000 28.0909 5/02/05 1,524 28.0992 4/29/05 1,139 28.0334 4/28/05 1,003 28.0000 4/28/05 3,473 28.0128 4/27/05 2,000 28.0100 4/26/05 2,206 27.9700 Gabelli Funds, LLC. Gabelli Dividend & Income Trust 5/06/05 12,200 28.1798 3/22/05 18,300 27.9000 3/21/05 1,700 27.8500 Global Utility Income Trust 3/21/05 1,000 27.8500 (1) Unless Otherwise Indicated, All Transactions Were Effected on the NYSE. (2) Price Excludes Commission. (*) Results in Change of Dispositive Power and Beneficial Ownership

from SC 13D 1 page <page> Exhibit 1 Joint Filing Agreement the Undersigned Parties Hereby Agree That the Schedule 13d Filed Herewith (And Any Amendments Thereto) Relating to the Common Stock of Insurance Auto Auctions, Inc. Is Being Filed Jointly on Behalf of Each of Them With the Securities and Exchange Commission Pursuant to Section 13(d) of the Securities Exchange Act of 1934, as Amended. Valueact Capital Partners L.P., By: Va Partners, L.L.C., Its General Partner /S/ George F. Hamel, Jr. By: Dated: February 16, 2001 George F. Hamel, Jr., Managing Member Va Partners, L.L.C. /S/ George F. Hamel, Jr. By: Dated: February 16, 2001 George F. Hamel, Jr., Managing Member /S/ Jeffrey W. Ubben Dated: February 16, 2001 Jeffrey W. Ubben /S/ George F. Hamel, Jr. Dated: February 16, 2001 George F. Hamel, Jr. /S/ Peter H. Kamin Dated: February 16, 2001 Peter H. Kamin