Annual Stockholders’ Meeting 2012 Elections to the Supervisory Board 1

Elections to the ­Supervisory Board of Bayer AG in 2012 2 Elections to the Supervisory Board Annual Stockholders’ Meeting 2012

Elections to the Supervisory Board

The term of office of all members of the Supervisory Board of Bayer AG expires at the end of the Annual Stockholders’ Meeting of Bayer AG on April 27, 2012. In accordance with statutory requirements, the Supervisory Board is composed of ten representatives of the stockholders and ten employee representatives. This publication provides brief profiles of the stockholder representatives nominated for election and the employee representatives, who have already been elected.

The Supervisory Board proposes that Dr. Manfred Schneider should be re-elected for the period until the end of Septem- ber 30, 2012. In this time, he would hold office as Chairman of the Supervisory Board. It is proposed that Mr. Werner Wenning should take office from October1 , 2012, and that he should be elected for the term running until the end of the Stockholders’ Meeting that resolves to ratify the actions of the Supervisory Board for fiscal2016 . It is proposed that he should be Chairman of the Supervisory Board in this period. Prof. Ekkehard D. Schulz and Prof. Ernst-Ludwig Winnacker are standing for election until the end of the Stockholders’ Meeting that resolves to ratify the actions of the Supervisory Board for fiscal2013 . All other candidates should be elected for the regular term until the end of the Stockholders’ Meet- ing that resolves to ratify their actions for fiscal2016 . Annual Stockholders’ Meeting 2012 Elections to the Supervisory Board 3

I. Nominations for stockholders’ representatives on the Supervisory Board

Dr. OEC. HSG. Dr. rer. pol. Paul Achleitner Clemens Börsig born on September 28, 1956 born on July 27, 1948 in Linz, Austria in Achern, Germany Member of the Board of Man­ Chairman of the Supervisory agement of Allianz SE, Munich Board of Deutsche Bank AG, Frankfurt am Main

1976 – 1984 First degree and 1969 – 1973 Degree in business doctorate from University of administration and mathema­ St. Gallen for Business Admin­ tics at Mannheim University; istration, Economics, Law and 1975 Doctorate in political Social Sciences; Harvard Busi­ ­science, Mannheim University; ness School: ISP ; 1973 – 1977 Research Assistant, 1984 – 1988 Bain & Co., Boston, Mannheim and Munich univer­ Manager, strategy consulting; sities; 1988 – 1989 Goldman Sachs 1977 – 1985 Mannesmann Group, & Co., New York, Vice President Düsseldorf: 1977 Head of the Mergers & Acquisitions; Group Planning Department, 1989 – 1994 Goldman Sachs In­ 1981 Head of Corporate Planning ternational, London, Executive at Mannesmann-Kienzle GmbH, Director, Investment Banking; 1983 Chief Administrative Officer 1994 – 1999 Goldman Sachs at Mannesmann-Tally; & Co. OHG, Frankfurt, Chairman 1985 – 1997 Robert Bosch GmbH, and partner, Goldman Sachs Stuttgart: 1985 Head of Corpo­ Group; rate Planning & Controlling, Since 2000 Member of the Board 1990 Member of the Board of of Management of Allianz AG Managing Directors, 1994 Gen­ (since October 2006 Allianz SE); eral Manager; 1997 – 1999 RWE AG, Essen, 1988 – 1999 Lecturer at Vienna Member of the Management University of Economics and Board and Chief Financial Officer; Business; Since 1999 Deutsche Bank AG, Since 1998 Honorary Professor Frankfurt am Main: 1999 Execu­ at WHU Koblenz; tive Vice President, Chief Finan­ cial Officer,2001 – 2006 Member Member of the Supervisory of the Management Board, Chief Board of Bayer AG since April Financial Officer,2002 Member 2002 of the Board of Management and the Group Executive Committee, Chief Financial Officer and Chief Risk Officer; Since 2006 Chairman of the Su­ pervisory Board of Deutsche Bank AG;

Supervisory Board of Bayer AG since April 2007 4 Elections to the Supervisory Board Annual Stockholders’ Meeting 2012

Thomas Ebeling Dr. rer. pol. Klaus Kleinfeld born on February 9, 1959 born on November 6, 1957 in Hannover, Germany in Bremen, Germany Chairman of the Executive Chairman and Chief Executive Board of ProSiebenSat.1 Media Officer of Alcoa Inc., New York, AG, Unterföhring U. S. A.

1980 – 1986 Degree in psychol­ 1976 – 1982 Degree in business ogy in Hamburg; administration in Göttingen; 1987 – 1991 Various roles at 1992 Doctorate at Julius Maxi­ ­Reemtsma, including Product milians University in Würzburg; Manager for the “West” brand; 1987 Siemens AG, assistant in 1991 – 1996 Various roles at the Corporate Sales and Market­ Pepsi-Cola, including Marketing ing unit; Manager, National Sales and 2001 Siemens, U. S. subsidiary, Franchise Director and General Chief Operating Officer; Manager; 2002 – 2003 Siemens, U. S. 1997 General Manager of ­subsidiary, President and Chief ­Novartis Nutrition for Germany Executive Officer; and Austria; 2004 Siemens AG, Central 1998 Head of the Nutrition ­Managing Board and Head of ­Division of Novartis; the Corporate Strategies 1998 Member of the Executive ­Department; Committee of Novartis; 2005 – 2008 Siemens AG, 2000 – 2007 CEO of the Novartis ­Chairman of the Managing pharmaceuticals business; Board; 2007 CEO of the Novartis Con­ 2008 CEO of Alcoa Inc.; sumer Health Division; 2010 Additionally named Since 2009 Chairman of the ­Chairman of Alcoa Inc.; ­Executive Board of ProSieben­ Sat.1 Media AG Member of the Supervisory Board of Bayer AG since April 2005 Annual Stockholders’ Meeting 2012 Elections to the Supervisory Board 5

Dr. rer. nat. Sue H. Rataj Helmut Panke born on August 31, 1946 born on January 8, 1957 in Storkow, Fürstenwalde, in Peoria, Illinois, U. S. A. Germany Member of various supervisory Non-Executive Director, Cabot boards Corporation, Boston, U. S. A.

1968 – 1972 Degree in physics 1985 BSc Economics & Finance, at the University of Munich; University of Illinois, U. S. A.; 1972 – 1976 Research and dis­ 1988 MBA, Finance, Northwestern sertation at the University of University, Kellogg Graduate Munich, doctorate in natural School, U. S. A.; sciences (Dr. rer. nat.); 1988 Joined Amoco Corporation; 1976 – 1978 Research at the 1988 – 1995 Various staff roles; Swiss Institute for Nuclear Re­ 1995 – 1996 Sales & Marketing search, simultaneous teaching Manager, Polybutene; role at the University of Munich; 1996 – 1998 Industry Manager, 1978 – 1982 Consultant at Lubricants & Additives; ­McKinsey & Company, Inc. in 1998 – 1999 Business Manager, Düsseldorf and Munich; Americas PTA; 1982 – 1993 BMW AG, roles in 1999 Joined BP Petrochemicals; various company units; 1999 – 2000 General Manager, 1993 – 1996 Chairman and North America PTA; CEO of BMW (US) Holding 2000 – 2001 Business Unit Leader, ­Corporation; Global Nitriles Business; 1996 – 1999 Member of the 2001 – 2002 Vice President, Board of Management of BMW ­Business Process Re-engineering; AG, Human Resources, Informa­ 2002 – 2004 President, Asia tion Processing; ­Aromatics; 1999 – 2002 Member of the 2004 – 2005 President, Global Board of Management of BMW PTA; AG, Finance; 2005 – 2006 Special Advisor, 2002 – 2006 Chairman of the ­Texas City Response; Board of Management of 2006 Chief Executive, Air BMW AG; BP & Marine Fuels; 2006 – 2008 Group VP, Safety, Member of the Supervisory Operations & Technology; Board of Bayer AG since April 2008 – 2009 Chief Executive, 2007 Global Aromatics & Acetyls; 2010 – 2011 Chief Executive, ­Petrochemicals; Since 2011 Member of the Board of Directors of Cabot Corporation; Audit Committee member and member of the Safety, Health and Environment committee 6 Elections to the Supervisory Board Annual Stockholders’ Meeting 2012

Dr. rer. pol. Prof. Dr.-Ing. Manfred Schneider Dr.-Ing. E.H. Dr. H.C. Ekkehard D. Schulz born on December 21, 1938 born on July 24, 1941 in Bremerhaven, Germany in Bromberg, Germany Chairman of the Supervisory Member of various supervisory Board of Bayer AG, Leverkusen boards

1959 – 1963 Degree in business 1961 – 1967 Degree in metallur­ administration at the Universi­ gy in Clausthal; ties of Freiburg, Hamburg and 1971 Doctorate; Cologne; 1972 – 1984 Joined the Thyssen 1963 – 1966 Assistant to the group, various roles with a focus ­Professor of Business Adminis­ on technology; tration at Aachen Technical ­University and doctorate in eco­ 1985 Initially Deputy member, nomics (Dr. rer. pol.); and from 1986 regular Member of the Executive Board of 1966 – 1971 Various roles in the ­Thyssen Stahl AG, production Organization, Auditing and Cost directorate, from 1988 Head of Accounting Departments of Technology; ­Bayer AG; 1991 Chairman of the Executive 1971 – 1981 Head of the Finance Board of Thyssen Stahl AG, and Accounting Department and member of the Executive Board later Chairman of the Board of of Thyssen AG; Duisburger Kupferhütte; 1997 Chairman of the Executive 1981 – 1987 Head of Regional Board of Thyssen Krupp Stahl AG; Coordination, Corporate Auditing and Controlling within the Corpo­ 1998 Chairman of the Executive rate Staff Division of Bayer AG; Board of Thyssen AG; From 1987 Member of the Board 1999 – 2001 One of two Chair­ of Management of Bayer AG; men of the Executive Board of ThyssenKrupp AG and Chair­ 1992 – 2002 Chairman of the man of the Executive Board of Board of Management of ­ThyssenKrupp Steel AG in Bayer AG; ­Duisburg; 1999 – 2001 President of the 2001 – 2011 Sole Chairman of German Chemical Industry the Executive Board of Thyssen­ ­Association (VCI); Krupp AG; Since 2002 Chairman of the ­Supervisory Board of Bayer AG; Member of the Supervisory Board of Bayer AG since April Member of the Supervisory 2005 Board of Bayer AG since April 2002 Annual Stockholders’ Meeting 2012 Elections to the Supervisory Board 7

Dr. phil. Werner Wenning Klaus ­Sturany born on October 23, 1946 born on October 20, 1946 in Wehrda, Germany in Leverkusen, Germany Member of various supervisory Member of various supervisory boards boards, former Chairman of the Board of Management of Bayer AG

1966 – 1970 Degrees in mathe­ 1966 – 1969 Commercial trainee matics, physics and business at Bayer AG, Leverkusen; administration at the University 1970 – 1975 Establishment and of Innsbruck and the College of management of the Finance Social Sciences, Economics and ­Department of Bayer Industrial Business in Linz, Austria, doc­ S. A. in Lima, Peru; torate in philosophy (Dr. phil.); 1975 – 1978 Roles in the Corpo­ 1971 – 1980 Kalle AG, Wies­ rate Auditing Department of baden, Management Board Staff, Bayer AG in Leverkusen; Business Administration, Data 1978 – 1983 Managing Director Processing and Head of the of Bayer Industrial S. A. in Lima, ­Organization Department; Peru; 1981 – 1989 Hoechst AG, Frank­ 1983 – 1986 Head of the Staff furt, Head of the Business Department of the Health Care ­Administration Department Sector of Bayer AG; (Corporate Controlling); 1986 – 1991 Initially Head of 1990 – 1995 Uhde GmbH, Dort­ Marketing for Thermoplastics, mund, Managing Director for then Head of Global Marketing Finance, Controlling, Human for the Plastics Business Group Resources, Materials Manage­ of Bayer AG; ment and Project Financing; 1991 – 1992 Assignment at the 1996 – 1999 GEA AG, Bochum, Treuhandanstalt privatization Member (CFO) and later Spokes­ agency in Berlin; man of the Board of Manage­ ment; 1991 – 1996 Managing Director of Bayer Hispania Industrial S. A. 1999 – 2007 Member of the and Senior Bayer Representative ­Executive Board of RWE AG, for Spain; Finance and Controlling Depart­ ment; 1996 Head of Corporate ­Planning and Controlling at ­Bayer AG; Member of the Supervisory 1997 Member of the Board of Board of Bayer AG since April Management of Bayer AG; 2007 2002 – 2010 Chairman of the Board of Management of Bayer AG; 2005 – 2007 President of the German Chemical Industry ­Association (VCI) 8 Elections to the Supervisory Board Annual Stockholders’ Meeting 2012

Prof. Dr. Dr. h.c. Mult. Ernst-Ludwig Winnacker born on July 26, 1941 in Frankfurt am Main, Germany Secretary General of the Human Frontier Science Program, ­Strasbourg

1960 – 1965 Degree in chemistry, Swiss Federal Institute of ­Technology, Zurich; 1968 Doctorate; 1968 – 1972 Postdoctorates at the University of California, Berkeley and the Karolinska ­Institute in Stockholm; 1972 – 1977 Assistant, then Visit­ ing Professor for the German Research Foundation (DFG) at the Institute for Genetics, Uni­ versity of Cologne; 1977 – 1980 Associate Professor, Institute of Biochemistry, ­Ludwig Maximilian University of Munich; Since 1980 Full Professor, Insti­ tute of Biochemistry, University of Munich; 1984 – 1997 Director of the ­Laboratory of Molecular Biology, University of Munich Gene ­Center; 1987 – 1993 Vice President of the German Research Founda­ tion; 1998 – 2006 President of the German Research Foundation; 2007 – 2009 First Secretary Gen­ eral of the European Research Council (ERC), Brussels;

Member of the Supervisory Board of Bayer AG since April 1997 Annual Stockholders’ Meeting 2012 Elections to the Supervisory Board 9

II. Results of the election of the employees’ representa- tives on the Supervisory Board On February 7, 2012, the employee delegates’ assembly elected the following representatives to the Supervisory Board of Bayer AG:

André van Broich Dr.-Ing. Thomas ­Fischer born on June 19, 1970 born on August 27, 1955 in Cologne, Germany in Olpe, Germany Chairman of the Dormagen Chairman of the Bayer Group Works Council of Bayer AG Managerial Employees’ ­Committee

1988 – 1991 Vocational training 1976 – 1981 Degrees in chemi­ as a chemical laboratory techni­ cal engineering at the Universi­ cian at Bayer AG; ty of Dortmund and in industri­ 1990 – 1996 Youth and Trainee al engineering at Dortmund Representative; University of Applied Sciences and Arts, doctorate in 1987; 1991 – 2000 Employment as a chemical laboratory technician 1986 Joined Bayer AG; various (Energy and Environmental roles as unit engineer, plant ­Services); manager and project manager; Since 1997 Member of the Works 2003 – 2006 Head of Process and Council; Plant Safety at Bayer Material­ Science (BMS); Since 2000 Full-time Member of the Works Council; Since 2006 Project Manager for Special Projects at BMS Since 2005 Member of the Cen­ Technology Services; tral Works Council and Econom­ ics Committee of Bayer AG; Since 1988 1988 Member of the German Chemical Industry Man­ 2006 – 2010 Vice Chairman of agerial Employees’ Association the Works Council; (VAA); Since 2006 Member of the Cen­ Since 2002 Chairman of the VAA tral Operations Committee and National Executive Committee; the Bayer European Forum; Since 1998 Member of the 2007 – 2008 Continuing studies ­Central and Group Managerial program in change management Employees’ Committee of Bayer at Ruhr University Bochum; AG; Since 2010 Chairman of the Since 2005 Chairman of the Works Council; Bayer Group Managerial Em­ Since 2011 Chairman of the ployees’ Committee; ­Cologne-Bonn District Executive Since 2001 Vice President of the Committee of the German European Federation of Mana­ ­Mining, Chemical and Energy gerial Staff in the Chemical and Industrial Union Other Industries (FECCIA); Since 2002 Vice President of the German Managerial Employees’ Association (ULA);

Member of the Supervisory Board of Bayer AG since Octo­ ber 2005 10 Elections to the Supervisory Board Annual Stockholders’ Meeting 2012

Peter Hausmann Reiner Hoffmann born on February 13, 1954 born on May 30, 1955 in Einbeck, Germany in Wuppertal, Germany Member of the Executive Com­ North Rhine District Secretary of mittee of the German Mining, the German Mining, Chemical Chemical and Energy Industrial and Energy Industrial Union, Union, Hannover Düsseldorf

1975 – 1980 Degree in law in 1972 – 1974 Vocational training Göttingen, first state examina­ as a wholesale and export clerk tion; at Hoechst AG; 1980 – 1982 Legal traineeship at 1975 – 1976 Civilian service at Braunschweig Higher Regional Wuppertal Hospital; Court, focus: attorney and labor 1977 – 1982 Degree in econom­ law, second state examination; ics at the University of Wupper­ 1982 – 1983 Attorney in Braun­ tal, Economics Department; schweig, focus: labor law and 1983 Assistant in the Economic consumer protection; and Social Committee (ESC) of Since 1983 Secretary of the the European Community, Brus­ ­German Chemical, Paper and sels, and Scientific Employee in Ceramics Industrial Union, Sec­ the Economics Department at retary in the Executive Commit­ the University of Wuppertal; tee Division for Youth Education 1984 – 1994 Various roles at until 1986; the Hans Böckler Foundation, 1987 Transfer to the Executive ­Düsseldorf; Committee Division for Wage 1994 – 2003 Director of the ­Policy / Humanization in the ­European Trade Union Institute ­German Chemical, Paper and (ETUI), Brussels; Ceramics Industrial Union, ­Attorney in the Wage Policy Since 2003 Deputy Secretary ­Department and the Wage Law General of the European Trade Section; head of various depart­ Union Confederation (ETUC); ments; Since 2009 North Rhine District Since 2006 North Rhine District Secretary of the German Mining, Secretary of the German Mining, Chemical and Energy Industrial Chemical and Energy Industrial Union, Düsseldorf; Union, Düsseldorf; Since 2009 Member of the Ex­ Member of the Supervisory ecutive Committee of the German Board of Bayer AG since Mining, Chemical and Energy ­October 2006 Industrial Union, Executive ­Committee Division for Wages / Finance, Hannover;

Member of the Supervisory Board of Bayer AG since April 2006 Annual Stockholders’ Meeting 2012 Elections to the Supervisory Board 11

Yüksel Karaaslan Petra Kronen born on March 1, 1968 born on August 22, 1964 in Malatya, Turkey in Krefeld, Germany Chairman of the Berlin Works Chairwoman of the Uerdingen Council of Bayer AG Works Council of Bayer AG

1985 – 1988 Schering AG, voca­ 1980 – 1982 Vocational training tional training as a chemical as a young chemical laboratory laboratory assistant; technician at Bayer AG, Krefeld- Since 1985 Member of the Ger­ Uerdingen; man Chemical, Paper, Ceramics 1982 – 1991 Chemical technician Industrial Union; in Central Research; 1988 – 1991 Chairman of Youth Since 1991 Full-time Member of and Trainee Representation, the Works Council; Member of the District Execu­ 1997 Vice Chairwoman of the tive Committee for Youth; Works Council; 1988 – 1991 Vocational training Since 1997 Member of the as a chemical laboratory techni­ ­Central Works Council and the cian at Schering; Central Operations Committee, Since 1994 Regular Member of Member of the Economics Com­ the Works Council; mittee and the Bayer European 1991 – 2002 Chemical laboratory Forum; technician (Chemical Pilot Plant Since 1999 Chairwoman of the Development); Works Council; 1998 Certification as a chemical industry foreman; Member of the Supervisory Since 2002 Full-time Member of Board of Bayer AG since July the Works Council; 2000 2006 Vice Chairman of the ­Berlin Works Council of ­Schering AG; 2007 Certification by the Ger­ man Chamber of Industry and Commerce (IHK) as a change manager; Since 2008 Chairman of the ­Berlin Works Council of Bayer AG, Vice Chairman of the Cen­ tral Works Council of Bayer AG; 2011 Certification as a human resources officer by the German National Association of Office Administration Staff 12 Elections to the Supervisory Board Annual Stockholders’ Meeting 2012

Petra Reinbold-Knape Michael Schmidt- Kiessling born on April 16, 1959 born on March 24, 1959 in Kassel, Germany in Wuppertal, Germany Northeast District Secretary of Member of the Elberfeld Works the German Mining, Chemical Council of Bayer AG and Energy Industrial Union, Berlin

1975 – 1976 Vocational training 1976 Vocational training as a as a clerical assistant, Enka chemical laboratory technician Glanzstoff, Kassel; at Bayer AG; initially employed 1977 – 1979 Clerical assistant in in chemical crop protection re­ Kassel; search following his vocational training, and then in chemical 1979 – 1982 Administration em­ pharmaceutical research at the ployee at the German Chemical, Pharmaceutical Research Paper and Ceramics Industrial ­Center in Wuppertal-Aprath; Union, Hannover; 1978 – 1980 Youth representa­ 1982 – 1983 Study at the Acad­ tive; Member of the Elberfeld emy of Labor in Frankfurt; Works Council of Bayer AG 1983 – 1997 Trade union secre­ ­continuously since 1981; tary at the German Chemical, Since 1994 Full-time Member of Paper and Ceramics Industrial the Works Council of Bayer AG; Union in Hesse and North Rhine-Westphalia; Since 2010 Vice Chairman of the Wuppertal Works Council of 1997 – 2007 District Secretary Bayer AG; Member of the and Deputy District Secretary of ­Economics Committee of Bayer the German Mining, Chemical AG; Member of the Central and Energy Industrial Union in Works Council the Hamm and Recklinghausen districts; focus on chemicals and energy, wage policy; Since 2007 Northeast District Secretary of the German Mining, Chemical and Energy Industrial Union, headquartered in Berlin; responsible for the states of Ber­ lin, Brandenburg, Mecklenburg- Vorpommern, Saxony, Saxony- Anhalt Annual Stockholders’ Meeting 2012 Elections to the Supervisory Board 13

Thomas de Win Oliver Zühlke born on November 21, 1958 born on December 11, 1968 in Leverkusen, Germany in Solingen, Germany Vice Chairman of the Supervi­ Chairman of the Leverkusen sory Board of Bayer AG; Chair­ Works Council of Bayer AG man of the Bayer Group Works Council; Chairman of the Bayer Central Works Council

1974 Joined Bayer AG; 1985 Vocational training as a 1975 – 1978 Vocational training chemical laboratory assistant at as an office administrator at Bayer AG; Bayer AG; 1985 Joined the German Chemi­ 1978 Permanent employment cal Industrial Union; in Bayer AG Administration; 1986 Union representative; 1976 – 1984 Various roles in 1988 – 1994 Youth and Trainee Overall, Youth and Trainee Representative; ­Representation; Since 1994 Full-time Member of 1980 – 1981 Civilian service; the Works Council; Since 1984 Member of the Since 2002 Member of the Eco­ Works Council of Bayer AG; nomics Committee of Bayer AG; Since 1989 Full-time Member of Since 2002 Vice Chairman of the the Works Council; Works Council of Bayer AG; vari­ Since 1998 Vice Chairman of the ous functions in the German Works Council; Vice Chairman Mining, Chemical and Energy of the Bayer European Forum Industrial Union: Chairman of and Member of the Bayer Cen­ the District Executive Commit­ tral and Group Works Councils; tee, State District Executive Committee, Advisory Board of Since 1999 Vice Chairman of the the National Industry Group for Bayer Central Works Council; Chemicals, Petroleum, Gas; Since 2001 Member of the Since 2006 Member of the ­Executive Committee of the ­Economics Committee of Bayer ­German Mining, Chemical and HealthCare; Energy Industrial Union; 2009 Distance learning program Since 2002 Chairman of the in personnel management; Leverkusen Works Council of Bayer AG; Since 2009 Chairman of the Bayer European Forum; Since 2005 Chairman of the Bayer Central Works Council; Since 2010 Chairman of the Leverkusen Works Council of Since 2010 Chairman of the Bayer AG; Bayer Group Works Council;

Member of the Supervisory Member of the Supervisory Board of Bayer AG since April Board of Bayer AG since April 2007 2002