Penwest Pharmaceuticals Co Watch

from SC 13G/A 1 page Exhibit 1 Power of Attorney for Certain Filings Under the Securities Exchange Act of 1934

from SC 13G/A 1 page Exhibit 1 Power of Attorney for Certain Filings Under the Securities Exchange Act of 1934

from SC 13D 8 pages Perceptive Life Sciences Master Fund Ltd. 499 Park Avenue, 25th Floor New York, Ny 10022 Tang Capital Partners, LP 4401 Eastgate Mall San Diego, Ca 92121 January 12, 2009 via Hand Delivery and Electronic Mail (Investor@penwest.com) Nominating and Governance Committee C/O Corporate Secretary Penwest Pharmaceuticals Co. 39 Old Ridgebury Road, Suite 11 Danbury, Connecticut 06810-5120 Re: Recommendations for Nominees for Election as Directors at the 2009 Annual Meeting of Shareholders of Penwest Pharmaceuticals Co. 1. Joseph Edelman 2. Kevin C. Tang 3. Andrew D. Levin, M.D., PH.D. Biographical and Background Materials Relating to Each Proposed Candidate Are Set Forth in Exhibits C Through E Attached Hereto. in Addition, the Candidates Are Prepared to Complete Any D&O Questionnaire Reasonably Requested by the Company in Connection With Their Nomination as Directors

from SC 13G/A ~5 pages Joint Filing Agreement

from SC 13G/A 1 page Exhibit 1 Power of Attorney for Certain Filings Under the Securities Exchange Act of 1934

from SC 13G/A 1 page Exhibit 1 Power of Attorney for Certain Filings Under the Securities Exchange Act of 1934

from SC 13G 2 pages Joint Filing Agreement

from SC 13G/A 1 page Exhibit 1 Power of Attorney for Certain Filings Under the Securities Exchange Act of 1934

from SC 13G/A 1 page Exhibit 1 - Joint Filing Agreement the Undersigned Hereby Agree That This Statement on Schedule 13g With Respect to the Beneficial Ownership of Shares of Common Stock, Par Value $.001 Par Value Per Share, of Penwest Pharmaceuticals Co. Is Filed Jointly, on Behalf of Each of Them. Dated: February 10, 2003 /S/ Paul P. Tanico Paul P. Tanico /S/ Ellen H. Adams Ellen H. Adams

from S-1/A ~50 pages Underwriting Agreement