MEMC/SunEdison Company

Riyadh , April 4, 2011

Safe Harbor

With the exception of historical information, the matters

disclosed in this presentation are forward-looking

statements. Such statements involve certain risks and

uncertainties that could cause actual results to differ

materially from those in the forward-looking statements.

Potential risks and uncertainties are described in the

Company’s filings with the Securities and Exchange

Commission, including its 2009 Form 10-K. These forward-

looking statements represent the Company’s judgment as

of the date of this presentation. The Company disclaims,

however, any intent or obligation to update these forward-

looking statements.

P. 2 | MEMC

MEMC Company Highlights

• Formed in 1959

• NYSE quoted & part of the S&P500 index

• +6,000 employees worldwide

• Globally diverse manufacturing & technology capabilities

• Manufacturing sites in 3 continents & 25 offices globally

• Major player in Hi-Tech and Solar: Selling to all major

Semiconductor & Solar companies

MEMC is the Global Leader in Products to the Semiconductor and Solar Industries

P. 3 | MEMC

About MEMC

P. 4 | MEMC

• MEMC provides the essential wafer foundations upon which

semiconductor and solar technologies are built.

• Semiconductor Materials: Companies like Intel and

Samsung build chips on our wafers, which then

become the building blocks of everything electronic.

• Solar Materials: Wafers are the foundation for solar

cells, which convert solar energy into usable

electricity.

• Develop solar power plants for customers around the world.

• SunEdison: MEMC subsidiary develops plants for

commercial and industrial customers like Wal-Mart,

Staples and General Electric, and has built one of

Europe’s largest solar plants in Rovigo, Italy.

A World Leader in Semiconductor and Solar Technology

Unique & Diversified Positioning

Source: SEMI, Photon & MEMC estimates. 2010 Market data shown.

Solar Industry Value Chain

Chain

Ingot Wafers Cells / Modules SystemsPolysilicon

MEMC

Ingot Wafers Semiconductors Electronics

Semiconductor/Electronics Value Chain

Polysilicon

MEMC

~ $1.2 trillion

$15 billion $70 billion

$10 billion

MEMC is a Global Leader in Semiconductor and Solar Technology.

P. 5 | MEMC

* Indicated locations are Polysilicon manufacturing facilities.

Manufacturing Facilities Sales & Support Offices SunEdison

Utsunomiya, Japan

Ipoh, Malaysia

Merano, Italy*

Pasadena, Texas*

Sherman, Texas

St. Peters, Missouri

Novara, Italy

Kuala Lumpur, Malaysia

Hsinchu, Taiwan

Chonan, South Korea

Kuching, Malaysia

Portland, Oregon

P. 6 | MEMC

True Global Presence

Beltsville, Maryland

Athens, Greece

Bangkok, Thailand

Barcelona, Spain

Chennai, Índia

Catania, Italy

Denver, Colorado

Dubai, U.A.E.

Lecce, Italy

Madrid, Spain

Milan, Italy

Minden, Nevada

Pennsauken, New Jersey

Portland, Oregon

Prescott, Arizona

Sacramento, California

San Clemente, California

San Francisco, California

San Juan, Puerto Rico

Seoul, South Korea

Shanghai, China

South Africa

Toronto, Canada

Chonan, South Korea

Hsinchu, Taiwan

Ipoh, Malaysia

Kuala Lumpur, Malaysia

Kuching, Malaysia

Merano, Italy

Novara, Italy

Pasadena, Texas

Portland, Oregon

St. Peters, Missouri

Sherman, Texas

Utsunomiya, Japan

Hsinchu, Taiwan

Novara, Italy

Paris, France

Shanghai, China

Santa Clara, California

Sherman, Texas

Singapore

Seoul, South Korea

St. Peters, Missouri

Tokyo, Japan

SunEdison Highlights

Pioneer provider of solar systems and services• First to provide commercial turn key solar power plants in the US without

capital investments from our customers

• ~ 400 solar power plants, financed and under O&M

Global Market Leadership

• Built first utility scale project in the US and Canada

• Built the largest EU single operating PV plant of 70MW in Italy

• Announced 400MW MOU with Government of South Korea in 2010

• In Italy Recipient of AmCham’s ‘Transatlantic Award 2010’ for substantial

investments in the research & photovoltaic energy production fields

Global Financial Leadership

• $1.5Bn energy fund partnership with First Reserve

• Strong brand and balance sheet allows quick deployment & execution

Technology Innovation

• Internal R&D to optimizes system design and production

• Leading monitoring technology maximizes uptime and production

We develop, build, finance, own and operate solar power plants

P. 7 | MEMC

Track energy

production

Fleet view / fund view

/ site view

View monthly fund /

asset reports

IPR (Investment

Performance Ratio)**:

solar asset

performance –

simplified

* IPR = Energy

produced / Reference

energy based on

long-term weather

average.

SunEdison Investor Connect, the online reporting portal for Investors

Rovigo project: A reference within the European PV Market

Location Rovigo (Italy)

Power installed 70 MW

Surface 850,000 sqm

Jobs created 500 – 700

Modules ~300,000

Yearly production 78.6 GWh/year

(energy to power approx. 16,500 homes)

Veneto

P. 9 | MEMC

Environmental benefits:

Rovigo plant is expected to prevent the emission of

40,000 tons of CO2 which equates to the removal of

8,000 cars from the road

Europe’s largest single operating PV plant in 2010

• A stable regulatory framework that attracts investors and financiers

• Excellent planning, engineering capabilities & Solar Experience

• Financial strength, proven execution

• Long term involvement

Rovigo project: Critical Success Factors

P. 10 | MEMC

Project Development Pipeline

659 MW

1.4 GW

2009

2010

P. 11 | MEMC

• Diverse & extensive customer base

• Major geographical diversification

• Segment & product differentiation

• Growing pipeline aggressively

Saudi Arabia could be a global solar leader

Capacity

(GW)

Oil

(%)

Saudi Arabia 44.5 57

UAE 21.5 2

Kuwait 10.8 70

Qatar 5.3 -

Oman 4 18

Bahrain 2.7 -

• Largest GCC market & leading in MENA

• Expected regional growth

• X2 Generation capacity over next 10

• Can achieve lowest Kwh

• Maximize natural resources & oil exports

• Capabilities to develop a global industry

Diversified business segments

P. 13 | MEMC

• > 150 kW

• Commercial and

Industrial Rooftops

• Systems Integrators for

PV Rooftops owned by

rooftop owners,

investment funds, …

• PPA programs for

different hosts: retail,

industrial, logistic,

Public Administration,

…

• < 150 kW

• Residential and Small

Commercial

• Based on a Certified

Installers Program

• Premium customer

services: training,

logistic, financing, after-

sales, …

Small SystemsCommercial

• Large scale ground-

mount projects

• Distributed generation

for Utilities

• Development,

Execution and O&M

Services

• Construction

Financing

• Premium guarantees

Utility Scale

Contact Information:

Pancho Perez

General Manager EMEA & LATAM

pperez@sunedison.com

Tel.: +34 915 242 670

www.sunedison.com