2005 NEWS RELEASES

December 13, 2005

HUMAN GENOME SCIENCES ANNOUNCES DECISION TO SPIN OFF COGENESYS DIVISION AS AN INDEPENDENT COMPANY

December 13, 2005

HUMAN GENOME SCIENCES TO SPONSOR CONFERENCE CALL TO DISCUSS DECISION TO SPIN OFF COGENESYS DIVISION AS AN INDEPENDENT COMPANY

December 12, 2005

HUMAN GENOME SCIENCES REPORTS RESULTS OF PHASE 2 CLINICAL TRIAL OF HGS-ETR1 IN PATIENTS WITH ADVANCED NON-HODGKIN'S LYMPHOMA

December 1, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF PRESENTATION AT FIRST ALBANY CONFERENCE

December 1, 2005

HUMAN GENOME SCIENCES APPOINTS TUAN HA-NGOC TO ITS BOARD OF DIRECTORS

November 17, 2005

HUMAN GENOME SCIENCES REPORTS INTERIM RESULTS OF PHASE 1B CLINICAL TRIALS OF HGS-ETR1 IN COMBINATION WITH CHEMOTHERAPY IN PATIENTS WITH ADVANCED SOLID TUMORS

November 17, 2005

HUMAN GENOME SCIENCES REPORTS RESULTS OF PHASE 1 CLINICAL TRIALS OF HGS-ETR2 IN PATIENTS WITH ADVANCED SOLID TUMORS

November 17, 2005

HUMAN GENOME SCIENCES REPORTS PHASE 2 RESULTS FOR LYMPHOSTAT-B (BELIMUMAB) IN PATIENTS WITH RHEUMATOID ARTHRITIS

November 15, 2005

HUMAN GENOME SCIENCES REPORTS INTERIM RESULTS OF PHASE 2 CLINICAL TRIAL OF ALBUFERON IN COMBINATION WITH RIBAVIRIN IN TREATMENT-EXPERIENCED HEPATITIS C PATIENTS

November 15, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF PRESENTATION AT CREDIT SUISSE FIRST BOSTON CONFERENCE

November 8, 2005

HUMAN GENOME SCIENCES CALLS FOR REDEMPTION ALL OF ITS REMAINING OUTSTANDING SUBORDINATED NOTES DUE 2007

November 3, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF PRESENTATION AT CIBC WORLD MARKETS CONFERENCE

November 1, 2005

HUMAN GENOME SCIENCES REPORTS RESULTS OF PHASE 2 CLINICAL TRIAL OF HGS-ETR1 IN PATIENTS WITH ADVANCED COLORECTAL CANCER

October 25, 2005

HUMAN GENOME SCIENCES ANNOUNCES FINANCIAL RESULTS FOR THE THIRD QUARTER OF 2005

October 25, 2005

HUMAN GENOME SCIENCES COMPLETES PATIENT ENROLLMENT IN A PHASE 2B CLINICAL TRIAL OF ALBUFERON® IN COMBINATION WITH RIBAVIRIN IN TREATMENT-NAÏVE PATIENTS WITH CHRONIC HEPATITIS C

October 19, 2005

HUMAN GENOME SCIENCES ANNOUNCES COMPLETION OF REPURCHASE OF CONVERTIBLE SUBORDINATED NOTES

October 12, 2005

HUMAN GENOME SCIENCES APPOINTS ROBERT C. YOUNG, M.D., TO ITS BOARD OF DIRECTORS

October 5, 2005

HUMAN GENOME SCIENCES TO SPONSOR CONFERENCE CALL TO DISCUSS PHASE 2 CLINICAL RESULTS OF LYMPHOSTAT-B IN SYSTEMIC LUPUS ERYTHEMATOUS PATIENTS

October 5, 2005

HUMAN GENOME SCIENCES REPORTS RESULTS OF A PHASE 2 CLINICAL TRIAL OF LYMPHOSTAT-B IN PATIENTS WITH SYSTEMIC LUPUS ERYTHEMATOSUS

October 3, 2005

HUMAN GENOME SCIENCES AWARDED TWO-PHASE CONTRACT TO SUPPLY ABTHRAX FOR THE TREATMENT OF INHALATIONAL ANTHRAX DISEASE TO THE U.S. GOVERNMENT

September 22, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF PRESENTATION AT UBS CONFERENCE

September 15, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF PRESENTATION AT BANC OF AMERICA CONFERENCE

September 8, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF PRESENTATION AT BEAR STEARNS CONFERENCE

September 6, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF PRESENTATION AT BIOCENTURY CONFERENCE

September 2, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF DISCUSSION AT THOMAS WEISEL PARTNERS CONFERENCE

August 18, 2005

GLAXOSMITHKLINE EXERCISES OPTION TO HUMAN GENOME SCIENCES' TRAIL RECEPTOR ANTIBODY

August 9, 2005

HUMAN GENOME SCIENCES ANNOUNCES COMPLETION OF OFFERING

August 4, 2005

HUMAN GENOME SCIENCES ANNOUNCES PRICING OF $230 MILLION PRIVATE PLACEMENT OF CONVERTIBLE SUBORDINATED NOTES

August 3, 2005

HUMAN GENOME SCIENCES ANNOUNCES PROPOSED PRIVATE OFFERING OF CONVERTIBLE SUBORDINATED NOTES

August 1, 2005

HUMAN GENOME SCIENCES RECEIVES MILESTONE PAYMENTS FROM GLAXOSMITHKLINE FOR GSK716155 PROGRESS

July 25, 2005

HUMAN GENOME SCIENCES ANNOUNCES FINANCIAL RESULTS FOR THE SECOND QUARTER OF 2005

July 22, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF PRESENTATION AT BANC OF AMERICA CONFERENCE

July 18, 2005

HUMAN GENOME SCIENCES PUBLISHES RESULTS OF PHASE 1 CLINICAL TRIAL OF ABTHRAX FOR USE IN PREVENTION AND TREATMENT OF ANTHRAX INFECTION

July 14, 2005

HUMAN GENOME SCIENCES NAMES BARRY A. LABINGER EXECUTIVE VICE PRESIDENT AND CHIEF COMMERCIAL OFFICER

July 7, 2005

GLAXOSMITHKLINE EXERCISES OPTION TO LYMPHOSTAT-B

July 5, 2005

HUMAN GENOME SCIENCES REPORTS RESULTS OF PHASE 2 CLINICAL TRIAL OF HGS-ETR1 IN PATIENTS WITH NON-SMALL CELL LUNG CANCER

June 13, 2005

HUMAN GENOME SCIENCES REPORTS INTERIM RESULTS OF PHASE 2 CLINICAL TRIAL OF HGS-ETR1 IN PATIENTS WITH ADVANCED NON-HODGKIN'S LYMPHOMA

June 13, 2005

HUMAN GENOME SCIENCES REPORTS INTERIM RESULTS OF PHASE 2 CLINICAL TRIAL OF HGS-ETR1 IN PATIENTS WITH ADVANCED NON-HODGIN'S LYMPHOMA

June 10, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF PRESENTATION AT GOLDMAN SACHS CONFERENCE

June 1, 2005

HUMAN GENOME SCIENCES INITIATES PHASE 2B CLINICAL TRIAL OF ALBUFERON® IN COMBINATION WITH RIBAVIRIN IN TREATMENT-NAÏVE PATIENTS WITH CHRONIC HEPATITIS C

May 26, 2005

HUMAN GENOME SCIENCES REPORTS ON PROGRESS TOWARD COMMERCIALIZATION

May 19, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF PRESENTATION AT ANALYST & INVESTOR MEETING

May 17, 2005

HUMAN GENOME SCIENCES REPORTS RESULTS OF PHASE 1 CLINICAL TRIALS OF HGS-ETR2 AND HGS-ETR1 IN PATIENTS WITH ADVANCED SOLID TUMORS

May 17, 2005

HUMAN GENOME SCIENCES REPORTS RESULTS OF PRECLINICAL STUDY COMPARING ANTI-VIRAL ACTIVITY OF ALBUFERON AND THREE OTHER FORMS OF INTERFERON ALPHA USED TO TREAT HEPATITIS C

May 12, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF PRESENTATION AT BANC OF AMERICA CONFERENCE

May 6, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF PRESENTATION AT ROBERT W. BAIRD GROWTH STOCK CONFERENCE

April 25, 2005

HUMAN GENOME SCIENCES ANNOUNCES FINANCIAL RESULTS FOR FIRST QUARTER OF 2005

April 18, 2005

HUMAN GENOME SCIENCES REPORTS RESULTS OF PHASE 1 CLINICAL TRIAL OF HGS-ETR1 IN PATIENTS WITH ADVANCED SOLID TUMORS

April 14, 2005

HUMAN GENOME SCIENCES REPORTS POSITIVE RESULTS OF PHASE 2 CLINICAL TRIAL OF ALBUFERON® IN TREATMENT-NAÏVE PATIENTS WITH CHRONIC HEPATITIS C

April 6, 2005

HUMAN GENOME SCIENCES REPORTS RESULTS OF A PHASE 2 CLINICAL TRIAL OF LYMPHOSTAT-B IN PATIENTS WITH RHEUMATOID ARTHRITIS

March 30, 2005

HUMAN GENOME SCIENCES BEGINS DOSING OF PATIENTS IN A PHASE 1 CLINICAL TRIAL OF CCR5 MAB IN PATIENTS INFECTED WITH HIV-1

March 28, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF PRESENTATION AT LEHMAN BROTHERS' CONFERENCE

March 11, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF PRESENTATION AT SG COWEN CONFERENCE

March 3, 2005

HUMAN GENOME SCIENCES COMPLETES PATIENT ENROLLMENT IN A PHASE 2 CLINICAL TRIAL OF HGS-ETR1 FOR THE TREATMENT OF NON-HODGKIN'S LYMPHOMA

February 25, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCASTS FROM TWO SECURITIES CONFERENCES

February 23, 2005

HUMAN GENOME SCIENCES COMPLETES PATIENT ENROLLMENT IN A PHASE 2 CLINICAL TRIAL OF HGS-ETR1 FOR THE TREATMENT OF COLORECTAL CANCER

February 16, 2005

HUMAN GENOME SCIENCES COMPLETES ENROLLMENT IN A PHASE 2 CLINICAL TRIAL OF ALBUFERON IN TREATMENT-NAÏVE PATIENTS WITH CHRONIC HEPATITIS C

February 7, 2005

HUMAN GENOME SCIENCES REPORTS FINANCIAL RESULTS FOR FULL YEAR AND FOURTH QUARTER 2004

January 20, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF PRESENTATION AT PIPER JAFFRAY HEALTH CARE CONFERENCE

January 10, 2005

HUMAN GENOME SCIENCES REPORTS ON PROGRESS OF CLINICAL TRIALS AND ANNOUNCES GOALS FOR 2005 AT JPMORGAN HEALTHCARE CONFERENCE

January 10, 2005

HUMAN GENOME SCIENCES RECEIVES FDA CLEARANCE TO INITIATE CLINICAL DEVELOPMENT OF A NEW COMPOUND FOR THE TREATMENT OF HIV/AIDS

January 7, 2005

HUMAN GENOME SCIENCES INVITES INVESTORS TO LISTEN TO WEBCAST OF PRESENTATION AT JPMORGAN HEALTHCARE CONFERENCE