X0306 4 2015-05-06 0 0000006176 AMPCO PITTSBURGH CORP AP 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 Common Stock 2015-05-06 4 P 0 1000 15.786 A 7000 I By: Investment Partnership I Common Stock 12000 I By: Investment Partnership II Common Stock 16000 D GAMCO Investors, Inc. has less that a 100% interest in this entity; GGCP, Inc. has less than a 100% interest in GAMCO Investors, Inc.; and Mario J. Gabelli has less than a 100% interest in GGCP, Inc. The amount of securities reported as beneficially owned reflects the total amount of securities held by this entity which is greater that 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 GGCP, Inc. /s/ Douglas R. Jamieson, Attorney-In-Fact for MARIO J. GABELLI, GGCP, INC., and GAMCO INVESTORS, INC. 2015-05-07