X0303 4 2010-11-08 0 0000849240 HAWK CORP HWK 0000807249 GAMCO INVESTORS, INC. ET AL ONE CORPORATE CENTER RYE NY 10580 0 0 1 0 0001185533 GABELLI MARIO J C/O GAMCO INVESTORS, INC ONE CORPORATE CENTER RYE NY 10580 0 0 1 0 0001238894 GGCP, INC. 140 GREENWICH AVENUE GREENWICH CT 06830 0 0 1 0 Class A Common Stock 2010-11-08 4 P 0 4491 49.8445 A 23949 I By: Investment Partnership I Class A Common Stock 1000 I By: Investment Partnership II Class A Common Stock 5000 I By: Limited Liability Co. The Reporting Persons have less than a 100% interest in this entity. The amount of securities reported as beneficially owned reflects the total amount of securities held by this entity which is greater than the Reporting Persons indirect pecuniary interests. The Reporting Persons hereby disclaim ownership of these securities in excess of their pecuniary interests. These shares are owned by a limited liability company. Mr. Gabelli has less than a 100% interest in the entity and disclaims beneficial ownership of the shares held by this entity which are in excess of his indirect pecuniary interest. /s/ Peter D. Goldstein, Attorney-In-Fact for MARIO J. GABELLI, GGCP, INC. and GAMCO INVESTORS, INC. 2010-11-10