X0303 4 2010-11-04 0 0001047188 PENWEST PHARMACEUTICALS CO PPCO 0001100962 ENDO PHARMACEUTICALS HOLDINGS INC 100 ENDO BOULEVARD CHADDS FORD PA 19317 0 0 1 0 0001501813 West Acquisition Corp. 100 ENDO BOULEVARD CHADDS FORD PA 19317 0 0 1 0 Common Stock, par value $0.001 per share 2010-11-04 4 P 0 3173334 A 33627009 I owned through wholly owned corporation Options 2.62 2010-11-04 4 P 0 928 A 2009-03-13 2010-12-31 Options 928 1576 I owned through wholly owned corporation Options 3.05 2010-11-04 4 P 0 398 A 2009-06-11 2010-12-31 Options 398 1576 I owned through wholly owned corporation Options 3.81 2010-11-04 4 P 0 250 A 2009-01-22 2010-12-31 Options 250 1576 I owned through wholly owned corporation Reflects shares of common stock, par value $0.001 per share ("Shares"), not tendered in the tender offer pursuant to the Agreement and Plan of Merger, dated August 9, 2010, by and among the Company, Endo Pharmaceuticals Holdings Inc. ("Parent") and West Acquisition Corp., a Delaware corporation and an indirect wholly-owned subsidiary of Parent ("Purchaser"), and deemed acquired at a price of $5.00 per Share, net to the seller in cash, without interest and less any required withholding taxes, pursuant to the consummation of the merger of the Purchaser with and into the Company (the "Merger"). At the effective time of the Merger, the aforementioned shares and options were cancelled and ceased to exist and each share of the Purchaser converted into shares of the Company. Purchaser's separate corporate existence ceased and the Company survived as an indirect wholly owned subsidiary of the Parent. /s/ Caroline B. Manogue 2010-11-08 /s/ Caroline B. Manogue 2010-11-08