The presentation by Werner Bauman at the Cheuvreux German Corporate Conference outlines Bayer's financial performance, strategic initiatives, and product pipeline as of January 2012. Bayer showcases growth in emerging markets, the introduction of several pharmaceutical products, and a restructuring program aimed at increasing efficiency and innovation. Key highlights include projected blockbuster drugs, healthcare market positions, and strategic roadmaps for Crop Science and Material Science segments.

1. Building a World-Class
Innovation Company
Werner Baumann, CFO
Cheuvreux German Corporate Conference
January 18, 2012

2. Disclaimer
This presentation may contain forward-looking statements based on current
assumptions and forecasts made by Bayer Group or subgroup management.
Various known and unknown risks, uncertainties and other factors could lead to
material differences between the actual future results, financial situation,
development or performance of the company and the estimates given here.
These factors include those discussed in Bayer’s public reports which are
available on the Bayer website at www.bayer.com.
The company assumes no liability whatsoever to update these forward-looking
statements or to conform them to future events or developments.
Page 2 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

3. Track Record of Performance
EBITDA before special items and margin* (€ billion) Core earnings per share* (€)
6.8 6.9 7.1 6
6.5
5.6
5
4.17 4.19
3.80 3.64
4
19.3% 20.9% 21.1% 20.8% 20.2%
2.99
3
2
2006 2007 2008 2009 2010 2006 2007 2008 2009 2010
Net cash flow* (€ billion) Net financial debt*, ** (€ billion)
5.4 5.8 .17.5
18
4.3 14.2
3.9 3.6 14 12.2
9.7
10 7.9
6
2
2006 2007 2008 2009 2010 2006 2007 2008 2009 2010
* 2006 - 2008 from continuing operations ** year-end data
Page 3 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

4. Strong Performance Continued in 2011
Sales EBITDA Core EPS Net Cash flow
Emerging Markets
in € million
% portfolio & currency adj.
pre-special items
in € million in € in € million
Significant Opportunity
27,337 6,072
26,076 5,412 3,832 3,908
3.86
3.24
9M´10 9M´11 9M´10 9M´11 9M´10 9M´11 9M´10 9M´11
+7% +12% +19% +2%
Page 4 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

5. At The Verge of a Business-Transforming
New Product Cycle in Pharma
2011 Pharma Pipeline Progress
Xarelto Eylea Alpharadin Regorafenib
(VEGF Trap-Eye)
Launched in US & EU Filed in EU and Japan Demonstrated Study met primary
for wet AMD improvement in overall endpoint of improving
ACS trial showed
survival in patients with overall survival in
significant reduction in
bone metastases in patients with metastatic
mortality
prostate cancer colorectal cancer
>€2bn* ≥€1bn* ≥€1bn* ≥€1bn*
4 potential blockbuster compounds to be launched near-term
Page 5 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012 * Peak sales estimates

6. Strong Growth Momentum in the
Emerging Markets
9M2011 Group sales breakdown; ∆% yoy Fx adjusted
+11%
64% 36%
+5%
Developed markets Emerging markets1
¹ Emerging markets: Latin America; Asia/Pacific w/o Japan, Australia,
New Zealand; Africa and Middle East incl. Turkey; Eastern Europe
Page 6 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

7. More Innovation – Less Administration –
Restructuring Program Fully on Target
Contribution by Subgroup Savings Initiative
 Savings and efficiency initiative at
Holding & Admin. HealthCare HealthCare, CropScience and at
corporate level
~12%  Annual cost savings of €800m
starting 2013, reinvestment of ~50%
~34% ~54%  One-time-charges of approx. €1bn
 Plans include reductions of 4,500 people
 2,500 new hires in growth and innovation,
particularly in emerging markets
CropScience
► Status Q3: Measures with €320 million
annualized savings already implemented
Page 7 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

8. Building Growth Momentum
in HealthCare
Page 8 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

9. HealthCare –
Leading Positions in Key Markets
2010 sales in € million
Pharma Sales Split by Segment 2010
€10,908m
 Leading positions in key therapeutic categories
Consumer Care 25%
€3,371m 20%
 Global #2 in OTC-pharmaceuticals
64%
Medical Care 9%
€1,514m
 #1 in fluid injection systems, #4 in blood glucose meters 7%
Animal Health
€1,120m
 Global #4 HealthCare €16,913m
Page 9 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

10. HealthCare –
Major Progress Achieved
 Key late-stage pipeline assets progressed
Pipeline Progress as planned or better
 Strong early- and mid-stage pipeline
 Savings program on track
Efficiency Improvement  Targeting approx. €430m p.a.
 Pharma margin improved
 Double-digit sales growth in 9M2011
Emerging Markets Growth  Expansion of marketing and sales
organization
 Strong growth of key brands
Consumer Health  Consumer Care (OTC pharmaceuticals)
gained share during 9M2011
Page 10 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

11. Xarelto –
Novel Direct Factor Xa Inhibitor
 Large global program involving over 75,000 patients
 Met primary efficacy endpoints in 9 phase III studies:
 RECORD 1-4, EINSTEIN DVT and EINSTEIN Extension; Rocket AF; MAGELLAN;
ATLAS ACS-TIMI 51
 Marketing & regulatory status:
 Launched in >85 countries for VTE prevention following total knee / hip replacement
surgery
 Launched in the US after approval for stroke prevention in patients with atrial fibrillation
(SPAF)
 Launched in Europe after approval for SPAF and DVT treatment
 ATLAS ACS-TIMI 51 Phase III trial met primary efficacy endpoint and showed significant
reduction in mortality (>30%); filed for secondary prevention of ACS in Europe and the US
 EINSTEIN-PE Phase III study ongoing – data expected early 2012
DVT: deep vein thrombosis; VTE: venous thromboembolism; ACS: acute coronary syndrome
Page 11 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

12. VEGF Trap-Eye –
Fusion Protein To Combat Eye Diseases
 In-licensed from Regeneron – Bayer has exclusive marketing rights ex-US
 Met primary efficacy endpoint in 4 phase III studies (VIEW I & II, Copernicus
& Galileo)
 Submitted for marketing approval in more than 10 countries including EU
and Japan for wet age related macular degeneration (AMD)1
 Filing for central retinal vein occlusion planned for 2012
 Additional studies in diabetic macular edema and myopic choroidal
neovascularization ongoing
 Start of SIGHT-Study in China – Phase III for wet AMD
1 Regeneron Pharmaceuticals holds US rights – FDA approval November 2011
Page 12 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

13. Alpharadin – New Opportunity to Treat
Bone Metastases
 Alpha-pharmaceutical (based on 223Radium, delivering highly energetic,
short ranging radiation) - in-licensed from Algeta
 Radium as natural bone seeker targeting bone metastases
 ALSYMPCA (phase III) in patients with bone metastases in prostate cancer
(CRPC) stopped early - Alpharadin demonstrated 44% improvement in
overall survival
 Filing targeted mid 2012
 Fast track designation granted by FDA
Tumor cells
Newly formed
bone
Bone metastases Radium-223 deposition Radium-223: highly localized tumor cell killing
CRPC: symptomatic hormone-refractory prostate cancer
Page 13 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

14. Regorafenib –
New Treatment Option in Cancer
 Oral multi-kinase inhibitor of angiogenic, stromal and oncogenic receptor
tyrosine kinases
 Currently studied in late-stage clinical trials in metastatic colorectal cancer
(mCRC) and gastrointestinal stromal tumors (GIST)
 CORRECT phase III trial in mCRC* stopped early on success (Oct ‘11)
 Study met its primary endpoint of significantly improving overall survival
 Full data to be presented at the ASCO GI
 Submission for marketing authorization in mCRC planned for 2012
 Phase III program in GIST ongoing, expect results early 2012
 FDA granted orphan drug (GIST) and Fast Track (GIST & mCRC)
designation
* for patients whose disease has progressed after
approved standard therapies
Page 14 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

15. Four Potential Blockbuster Products
Expected to be Launched Near-term
Project Indications Peak sales potential*
Xarelto SPAF, other
anticoagulation > €2bn
wet AMD, DME,
VEGF Trap-Eye ≥ €1bn
CRVO, myopic CNV
Bone metastases in
Alpharadin
cancers ≥ €1bn
mCRC, GIST,
Regorafenib
other cancers ≥ €1bn
* Subject to approval as expected
Page 15 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

16. Consumer Care –
Consistent Strong Performance
Sales Consumer Care in € million;
∆% y-o-y Fx and portf. adjusted
Highlights
3,371
3,020 3,080 +8%  Global #2 in OTC pharmaceuticals
2,634
 Track record of performance
2,531 2,588
2,355  Some of the world’s most
recognized brands
 Acquired Roche OTC, Citracal,
Sagmel and Topsun
1,336
 Significant organic as well as
inorganic growth opportunities
2004 2005 2006 2007 2008 2009 2010 9M2011
Page 16 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

17. Consumer Care – Strong Brands
Sales in € million; ∆% y-o-y Fx adjusted
Brand 9M2011 Sales y-o-y Growth
324* +10%
209 +8%
175 +8%
168 +6%
127 +4%
101 +3%
* Only Aspirin CC sales, excluding Rx Aspirin Cardio
Page 17 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

18. Executing new
Strategic Agenda
Page 18 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

19. CropScience –
A Leader in its Markets
Herbicides €1,944m €1,370m Insecticides
Market position: 2 Market position: 1
20%
29%
Env. Science €650m €1,570m Fungicides
Market position: 1 Market position: 3
23%
9%
BioScience €687m 10% 9% €609m Seed Treatment
Market position: 6 Market position: 2
Sales 2010: €6,830m
Page 19 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

20. CropScience –
Major Progress Achieved
 Developed and communicated new business strategy,
Strategy execution underway
Performance &  9M2011: 11% organic growth and 500bpts. higher margin
Productivity  Savings projects on target for €265m contribution by 2012
 Refocused R&D investments
Innovation
 R&D productivity remains on high level
Emerging Markets  9M2011: 13% organic growth
Page 20 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

21. CropScience –
Strategic Roadmap
Rejuvenate the core Reinvent customer-
Rebalance and Extend BioScience
Crop Protection centricity along the
refocus innovation footprint
business entire value chain
 Streamline portfolio  Better understand and  Raise overall R&D  Strengthen our position
serve interconnected spend to more than in established crops
 Optimize our supply needs of customers, €850 million by 2015
chain model and asset
from farmers to
 Develop leading
footprint
agronomists, raw
 Increase BioScience positions in 3 of 4 broad
R&D to be level with acre crops
 Target savings of €265 material processors,
AgChem spend
million through 2012 food processors,
retailers and consumers  Focus Crop Protection
R&D on high-growth
areas
Page 21 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

22. CropScience –
Rebalance and Refocus Innovation
R&D spending in € million
Best-in-class R&D productivity
>850
 23 new agrochemical active ingredients
722 launched since 2000, generated sales of €2bn
664 in 2009
 Launched >45 AgChem formulations and
>170 seed varieties since 2010
 Planning to launch 4 new molecules between
2012 and 2015
 Refocus R&D: Increase BioScience R&D to
be level with AgChem spend, focus
CropPotection R&D on high growth areas
2005 2010 2015e
AgChem BioScience
Page 22 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

23. CropScience –
Extend BioScience Footprint
Strengthen our position Develop leading positions in
in established crops 3 of 4 broad acre crops
 Leverage cotton and oilseeds  Enter soybean seeds and traits market
opportunities through regional  Invest in wheat to build leading breeding
expansion and new traits and traits platform
 Continue to grow our strong  Extend rice production considerably
vegetables franchise
FY Change
Sales (in €m)
2010 % Fx adj.
 Secure proprietary access to top
Oilseeds 168 +33 germplasm and breeding excellence
Cotton seeds 152 +54  Ensure fast and focused development of
Vegetables 273 +10 distinctive traits, in collaboration or alone
Rice 34 +36
Total BioScience 687 +27
Page 23 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

24. From Megatrends
To Business
Page 24 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

25. MaterialScience –
Leading Positions in All Segments
Sales in € million
Polyurethanes Sales Split by Segment 2010
€5,024m
 #1-2; approx. 23-24% market share*
Polycarbonates
€2,791m 28%
 #1; approx. 27% market share
49%
Coatings, Adhesives, Specialties 5%
€1,791m
 #1; >40% market share**
18%
Industrial Operations
€548m
€10,154m
*depending on segment
Page 25 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012 ** arom. & aliph. isocyanates

26. MaterialScience –
Major Progress Achieved
 9M2011 – achieved 11% organic growth on
Performance higher prices, earnings basically flat on higher
raw material costs
 Opened new world-scale TDI plant in China
Productivity  Capacity expansion at China site
 9M2011 plus 10% organic growth
Emerging Markets  Global PC headquarter moved to China
Page 26 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

27. Capitalize on Global Market Trends
and Spur Future Growth
Energy consumption
Buildings are responsible for more than 40% of global
energy use*
Greenhouse-gas emissions
14% of greenhouse gases worldwide origin from the
transportation sector, making it the third largest emission
source**
Noise
About 30% of the EU population are exposed to road
traffic noise in excess of 55 dB(A) during night time***
Bayer polymers help to save energy, reduce CO2 emissions and avoid traffic noise
*Source: UNEP, Sustainable Buildings and Climate Initiative
**Source: World Resources Institute
*** WHO recommends less than 30 dB(A); dB(A): A-weighted decibel quality
Page 27 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

28. China – Center of Gravity of
MaterialScience´s Customer Industries
 The largest construction market in
the world
World’s largest PCS
 The largest automotive market in the market
world
 The largest railway market in the
world
To become the world’s
 The largest consumer electronics largest PUR market by
market in the world 2015
 World’s second largest economy with
strong momentum
A close second behind
 World’s largest exporter the US for the world’s
largest Coatings market
PUR: polyurethane, PCS: polycarbonate
Page 28 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

29. MaterialScience – Expansion of
Production Capacities in China
Strengthening Leadership Through Further Local Production and Know-how
 Second investment stage at PUR PCS CAS
largest, fully integrated site in
MDI PCS HDI
Shanghai
350 kt in 2010 200 kt in 2010 30 kt in 2010
 New investment of approx. €1bn in
Shanghai until 2016 to +650 kt until 2016 +300 kt until 2016 +50 kt until 2016
 Increase MDI capacity to TDI
1,000kt/year 250 kt in 2011
 Increase PCS capacity to
500kt/year
 Increase HDI capacity, new
50kt line planned
 Expansion of local R&D activities
MDI: methyl diphenylene diisocyanate, TDI: toluene diisocyanate
HDI: hexamethylene diisocyanate, PCS: polycarbonate
Page 29 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

30. Building a World-Class Innovation
Company
2011 A Year of Significant Progress
 Delivered growth and performance, 9M2011: adj. sales up 7%, adj.
EBITDA up 12%, reported EPS +43%, Core EPS +19%
 Group FY 2011 financial outlook1) projects 5-7% organic sales growth,
adj. EBITDA > €7.5bn and core EPS growth of ~15%
 Further strategic progress:
 Innovation pipeline: 4 potential blockbuster compounds in pharma
pipeline
 Productivity: Group-wide restructuring plans with €320 million
annualized savings already implemented
 Emerging markets: 11% organic growth
1) Aspublished with Q3 statements on October 27, 2011;
the company is not providing intra quarterly guidance updates
Page 30 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

31. Appendix
Page 31 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

32. 3rd Quarter 2011 –
Successful Development Continued
Q3‘11 ∆% Highlights of Financial Results
€ million € million
Sales 8,670 +1 (+5)  All subgroups contributed to sales
EBITDA
growth
- reported 1,731 +41
 Continuing momentum in emerging
- adjusted 1,805 +8
markets
EBIT
- reported 1,099 +95  Adj. EBITDA raised on lower costs
- adjusted 1,174 +17 at HealthCare and higher volumes
Net income 642 +125
at CropScience. MaterialScience
lower due to higher raw material and
Net cash flow 1,577 +1
energy costs
Free operating cash flow 1,223 +5
EPS  Reported EBIT impacted by net
- reported 0.78€ +123 special charges of €75m (prev. year
- core 1.12€ +18 €436m)
( ) = Fx & portfolio adjusted
Page 32 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

33. Emerging Markets Show Continuing
Strong Momentum
3rd Quarter 2011 Group sales by region Emerging Economies
+7%
USA Emerging
~1,300 +12%
+3% Economies¹
20% 36% +10%
~1,150
19% 38%
+7% +11%
33%
10% 450 ~430
Western Europe Others²
+1% +4%
Group €8,670m; +5% Emerging Latin Eastern Africa &
Asia³ America Europe Middle East
In € million, ∆% yoy Fx adjusted ¹ Emerging economies include: Latin America, Asia w/o Japan, Australia,
New Zealand, Africa and Middle East incl. Turkey, Eastern Europe
² Others = Japan, Australia, New Zealand, Canada
³ Emerging Asia = Asia w/o Japan, Australia, New Zealand
Page 33 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

34. 3rd Quarter 2011 –
Cash Flow And Net Debt Development
Q3 2011 Cash Flow Net Debt Development
In € million In € billion
-0.4
GCF NCF Invest- oFCF
cont. ments
7.4 7.0
1,327 1,577 354 1,223
∆%
y-o-y +50 +1 -10 +5
Q2´11 Q3´11
Page 34 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

35. HealthCare –
Emerging Markets Driving Growth
Q3’11 Sales Earnings
in € million, ∆% yoy, () = Fx & portf. adjusted Adj. Adj.
Pharma EBITDA EBIT
Consumer
Health 36% -3% (0%) 1,226 +9%
0% (+4%) 1,122
1,537 2,663
909 +16%
785
739 853 +15%
470 600 +28%
383 373 -3% 315 309 -2%
HealthCare €4,200m; -2% (+2%) Q3‘10 Q3‘11 Q3‘10 Q3‘11
Price Volume Fx Portfolio
0.6% 1.0% -3.5% 0.2%
Page 35 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

36. CropScience –
Strong Volume Growth At Crop Protection
Q3’11 Sales Earnings
in € million, ∆% yoy, () = Fx & portf. adjusted Adj. Adj.
Crop Protection / EBITDA EBIT
Environmental
Science 36% BioScience
-9% (-3%) +4% (+11%) 165 +47%
114 1,265
112
470 600
46
·
-18
CropScience €1,379m; +3% (+9%)
Q3‘10 Q3‘11 Q3‘10 Q3‘11
Price Volume Fx Portfolio
-1.9% 11.3% -5.9% -0.7%
Page 36 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

37. MaterialScience –
Sales Driven By Higher Selling Prices
Q3’11 Sales Earnings
in € million, ∆% yoy, () = Fx & portf. adjusted Adj. Adj.
EBITDA EBIT
Polycarbonates Polyurethanes
+3% (+7%) 36% +4% (+7%)
408
749 1,371
348 -15%
259
196 -24%
CAS* 475
0% (+3%)
173
IO**
+21% (+24%)
MaterialScience €2,768m; +4% (+7%) Q3‘10 Q3‘11 Q3‘10 Q3‘11
Price Volume Fx Portfolio *CAS: Coatings, Adhesives, Specialties
7.1% 0.3% -3.7% 0.2% ** IO: Industrial Operations
Page 37 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

38. Reporting Events and AGM
Date Event Publication
Tuesday,
Investor Conference Call 2011 Annual Report
February 28, 2012
Meet Management,
March 13-14, 2012 Investor Conference
Leverkusen
Thursday, 1st Quarter 2012 Results
Investor Conference Call
April 26, 2012 Stockholders’ Newsletter
Friday,
Annual General Meeting
April 27, 2012
Tuesday, 2nd Quarter 2012 Results
Investor Conference Call
July 31, 2012 Stockholders’ Newsletter
Tuesday, 3rd Quarter 2012 Results
Investor Conference Call
October 30, 2012 Stockholders’ Newsletter
Page 38 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012

39. Investor Relations Contacts
Dr. Alexander Rosar
Head of Investor Relations
Phone: +49-214-30-81013
E-mail: alexander.rosar@bayer.com
Dr. Jürgen Beunink Ute Menke
Phone: +49-214-30-65742 Phone: +49-214-30-33021
E-mail: juergen.beunink@bayer.com E-mail: ute.menke@bayer.com
Peter Dahlhoff Judith Nestmann
Phone: +49-214-30-33022 Phone: +49-214-30-66836
E-mail: peter.dahlhoff@bayer.com E-mail: judith.nestmann@bayer.com
Fabian Klingen Dr. Olaf Weber
Phone: +49-214-30-35426 Phone: +49-214-30-33567
E-mail: fabian.klingen@bayer.com E-mail: olaf.weber@bayer.com
Page 39 • Bayer Investor Presentation • Cheuvreux German Corporate Conference • Werner Baumann • January 18, 2012