OCI TerraSus

What OCI TerraSus does

OCI TerraSus Sdn. Bhd. is a Malaysia-based, wholly-owned subsidiary of South Korean conglomerate OCI Holdings Company Ltd., specialising in the manufacture of high-purity polysilicon for solar photovoltaic and (forthcoming) semiconductor end-markets. The company operates its primary production facility at the Samalaju Industrial Park in Bintulu, Sarawak, where it produces solar-grade polysilicon (10-nines purity) via the Chemical Vapour Deposition (CVD) process, powered primarily by renewable hydropower from Sarawak Energy. Current nameplate solar-grade capacity is 35,000 metric tonnes annually, with a planned expansion to 56,600 MT under a RM4.6 billion (approximately US$1 billion) investment commitment through 2028.

The company's revenue model is direct B2B enterprise sales of polysilicon to global solar PV manufacturers and — beginning with a 2025-formed 50-50 joint venture with Japan's Tokuyama Corporation called OCI Tokuyama Semiconductor Materials (OTSM) — to semiconductor wafer and chip manufacturers in Korea, Japan, and Taiwan. OTSM is constructing an 8,000 MT/year semiconductor-grade polysilicon plant at Samalaju, scheduled for commercial operations in January 2029, with US$125 million of debt financing from the IFC and an 80 MW renewable-energy PPA with Sarawak Energy. A second joint venture, OCI Kumho (with Kumho P&B Chemicals), produces epichlorohydrin (ECH) for epoxy resins and operates a closed-loop Brine Recycling Process with the main polysilicon plant, enabling wastewater-free chemical production.

OCI TerraSus differentiates through hydropower-powered manufacturing (lowest embedded carbon footprint vs. coal-powered competitors), proprietary circular-economy processes including a Steam Recovery System that cuts electricity use by ~40%, and a fully non-Chinese, FEOC-compliant supply chain that channels polysilicon into US solar cell production via sister subsidiary Mission Solar Energy. The company serves enterprise customers exclusively through long-term supply agreements, with a workforce of over 1,000 technical employees and additional expansion headcount of ~200 tied to the new semiconductor plant.

Name

OCI TerraSus

Legal name

OCI TerraSus Sdn. Bhd.

Website

https://ociterrasus.com

Company type

Private

Founded year

2017

Operating status

Operating

Headcount range

501–1,000 employees

Short description

OCI TerraSus is a Malaysia-based subsidiary of South Korea's OCI Holdings that manufactures high-purity solar-grade polysilicon at its hydropower-powered Samalaju Industrial Park facility. It sells directly to global solar PV manufacturers and is expanding into semiconductor-grade polysilicon via the OTSM joint venture with Tokuyama Corporation.

Ownership category

akta.pro rank

Product category

Polysilicon Manufacturing

NAICS

Resin, Synthetic Rubber, and Artificial and Synthetic Fibers and Filaments Manufacturing (3252)

SIC

Semiconductors & Related Devices (3674), Plastic Materials, Synth Resins & Nonvulcan Elastomers (2821), Industrial Organic Chemicals (2860)

akta.pro primary industry

Solar PV Module & Cell Manufacturing (Crystalline, Thin-Film) (EUAMAHAA)

akta.pro secondary industries

Thin-Film Deposition Materials (PVD/CVD/ALD Targets & Precursors) (HDAHAGAH), PVC & Chlorinated Polymers (IMAEANAB)

Keywords

• Solar-grade polysilicon
• Semiconductor-grade polysilicon
• Epichlorohydrin production
• Photovoltaic materials
• High-purity silicon manufacturing

Headquarters

HQ city

Kuching

HQ country

Malaysia

HQ region

Asia

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Technology or R&D, Operations, Infrastructure, Personnel, Supply Chain

Revenue model

1. Solar-grade polysilicon sales: OCI TerraSus manufactures and sells high-purity solar-grade polysilicon to solar PV manufacturers and photovoltaic cell producers globally. Primary revenue stream from long-term supply agreements.
2. Semiconductor-grade polysilicon sales: Ultra-high purity polysilicon for semiconductor chips and silicon wafers produced via the OCI Tokuyama Semiconductor Materials joint venture, targeting Korea, Japan, and Taiwan export markets. Operations scheduled to begin January 2029.
3. Epichlorohydrin (ECH) sales via OCI Kumho JV: OCI Kumho joint venture with Kumho P&B Chemicals produces epichlorohydrin (ECH), a key chemical used in epoxy resins and rubber manufacturing, generating revenue through sales to coatings, electronics, and automotive industries.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels9 records

Core offering

OCI TerraSus manufactures high-purity polysilicon for the solar photovoltaic and semiconductor industries at its Samalaju Industrial Park facility in Bintulu, Sarawak, Malaysia. The company produces solar-grade polysilicon (10-nines purity) at 35,000 metric tonnes annual capacity and is expanding into semiconductor-grade polysilicon via a joint venture. Through its OCI Kumho joint venture, it also produces epichlorohydrin (ECH) for epoxy resin, coatings, and industrial chemical applications.

Product overview

OCI TerraSus is a Malaysia-based polysilicon manufacturing company and subsidiary of OCI Holdings (South Korea). The company's primary product is solar-grade polysilicon (produced at 35,000 metric tonnes annually using hydropower), which is the essential raw material for silicon wafers and photovoltaic cells. The company is expanding into semiconductor-grade polysilicon through its OCI Tokuyama Semiconductor Materials (OTSM) joint venture with Tokuyama Corporation (Japan), with commercial production targeted for 2029. Through its OCI Kumho joint venture with Kumho P&B Chemicals, the company also produces epichlorohydrin (ECH) for epoxy resins and related chemicals. OCI TerraSus positions itself at the intersection of clean energy materials and semiconductor supply chains, powering both solar PV systems and AI/semiconductor industries.

Differentiator

Problem solved

Functional benefit

Products and services

• Solar-grade polysilicon Ultra-high-purity polysilicon (10-nines purity) for solar photovoltaic panels, produced at the Samalaju Industrial Park using clean hydropower energy. Annual capacity of 35,000 metric tonnes, supplied to global solar PV manufacturers and downstream to Mission Solar Energy's US solar cell production plant.
• Semiconductor-grade polysilicon (OTSM) Ultra-high-purity polysilicon for semiconductors with significantly higher purity requirements than solar-grade, manufactured through the OCI Tokuyama Semiconductor Materials (OTSM) 50-50 joint venture with Japan's Tokuyama Corporation. Annual capacity of 8,000 metric tonnes, targeting AI, data centre, and advanced semiconductor chip markets in Korea, Japan, and Taiwan.
• Epichlorohydrin (ECH) Epichlorohydrin (ECH) produced through the OCI Kumho joint venture with Kumho P&B Chemicals. Used as a key raw material in epoxy resins, coatings, electronics, automotive components, wind turbine blades, water treatment, and rubber manufacturing.

Quantifiable outcome

• 35,000 metric tonnes annually of solar-grade polysilicon capacity, expandable to 56,600 MT
• +4 more outcomes

Named customers4 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Nine partnerships are on record, tiered supporting and core.

• Universiti MalayasupportingStrategic or Co-development Partner · 13 January 2026MoU for year-long programme with Faculty of Languages and Linguistics focusing on leadership engagement, cultural exchange, community outreach, and sustainability education. Part of Women Empowerment Programme. Principal Director Dr. Kim Soo Yeon delivered keynote address.
• Invest SarawaksupportingStrategic or Co-development Partner · 8 August 2025OTSM signed MoA with Invest Sarawak to develop supply chains, forge strategic partnerships, and build industrial ecosystems to support OTSM's semiconductor-grade polysilicon plant operations and Sarawak's ambition as a regional tech hub.
• Sarawak Energy Berhad / Syarikat Sesco BerhadcoreOthers · 16 July 202510-year Power Purchase Agreement (PPA) signed with Sarawak Energy Berhad for 80-megawatt power supply to the new semiconductor-grade polysilicon plant from commencement of operations in 2029. Renewable energy for sustainable manufacturing.
• Mission Solar Energy (MSE)coreStrategic or Co-development Partner · 20 March 2025OCI TerraSus will supply high-purity solar-grade polysilicon produced using renewable hydropower in Sarawak to Mission Solar Energy's new solar cell production plant in the US (RM1.17 billion / US$265 million investment). Establishing a fully non-Chinese solar supply chain.
• Tokuyama CorporationcoreStrategic or Co-development Partner · 1 January 2025Joint venture with Japan's Tokuyama Corporation called OCI Tokuyama Semiconductor Materials Sdn. Bhd. (OTSM) to manufacture semiconductor-grade polysilicon at Malaysian facilities. 50-50 joint venture. Commercial production scheduled to begin January 2029. Tokuyama is one of the world's largest producers of silicon.
• Girl Guides Association of Malaysia (Sarawak Branch)supportingOthers · 1 January 2025Ongoing CSR partnership for youth empowerment, sustainability education, and community development. Donation of RM100,000 to support 2,285 members and students affected by Bintulu floods. Previous collaboration on Student Sustainability Symposium.
• Natural Resources Environment Board (NREB)supportingOthers · 7 December 2024NREB officers participated in Student Sustainability Symposium conducted by OCI M, providing briefings on practical environmental protection methods including recycling and reusing.
• Kumho P&B ChemicalscoreStrategic or Co-development Partner · 1 January 2024Joint venture OCI Kumho to produce epichlorohydrin (ECH), a key chemical used in epoxy and rubber production. Through the Brine Recycling Process, natural salt is supplied to OCI Kumho and brine by-product from ECH production is returned to OCI TerraSus for caustic soda production, creating a circular system.
• Universiti Putra Malaysia (UPM) SarawaksupportingStrategic or Co-development Partner · 1 January 2024Research partnership to explore treated manufacturing sludge as soil conditioner for agriculture. Field trials on melon and corn crops showed enhanced soil fertility and crop yields comparable to or better than chemical fertilisers. Led by Prof. Dr. Patricia King.

Scale indicators14 records

Recent moves11 records

Expansion highlights6 records

Direct peers

• Tokuyama Corporation: Japan-based Tokuyama is both a JV partner and direct competitor in semiconductor-grade polysilicon. It operates one of the world's largest electronic-grade polysilicon facilities and has deep customer relationships across wafer fabs in Korea, Japan, and Taiwan, making it the most relevant benchmark for OTSM's commercial trajectory.
• Wacker Chemie: Germany-based Wacker Chemie is one of the world's largest non-China polysilicon producers with decades of semiconductor-grade and solar-grade capacity. It is the most direct comparable to OCI TerraSus given similar product mix (solar + semiconductor grades), similar tier-1 customer base, and similar focus on quality and ESG positioning.
• Tongwei Co. China-based Tongwei is the world's largest polysilicon producer with hundreds of thousands of MT of capacity. While based in China and not directly competing for FEOC-compliant demand, it sets global polysilicon pricing and capacity expansion benchmarks.
• REC Silicon: Norway and US-based REC Silicon produces high-purity polysilicon for solar PV and electronics applications using hydropower in Moses Lake, Washington. Its renewable-powered model and FEOC positioning closely mirror OCI TerraSus's strategy.
• Daqo New Energy: China-based Daqo is a major polysilicon producer and one of the lowest-cost manufacturers globally. It is publicly listed and provides a useful financial benchmark for solar-grade polysilicon margins and capital intensity.
• Hemlock Semiconductor: US-based Hemlock Semiconductor (owned by Corning and Dow) is a major producer of both solar-grade and semiconductor-grade polysilicon. It serves similar wafer and PV customers and competes directly for FEOC-compliant US solar supply contracts.
• Xinjiang Daqo: Subsidiary of Daqo New Energy, Xinjiang Daqo operates some of the largest polysilicon production facilities in Xinjiang, China. It is a key marginal cost producer that sets the floor for global polysilicon pricing.
• GCL Technology Holdings: Hong Kong/China-based GCL Technology is one of the top global polysilicon producers, primarily serving the Chinese solar PV supply chain. It is the dominant benchmark for Chinese polysilicon cost curves and pricing dynamics.

Broad incumbents

• East Hope Group: China-based East Hope is a diversified industrial conglomerate with rapidly expanding polysilicon capacity. It represents the new wave of Chinese polysilicon capacity that drives global oversupply and pricing pressure.
• OCI Holdings: South Korea-based OCI Holdings is OCI TerraSus's parent company and the original polysilicon pioneer. It operates polysilicon and chemical assets globally and is the controlling shareholder of OCI Tokuyama Semiconductor Materials JV, making it the strategic benchmark for valuation and capital allocation.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/share/15zQvFqb1e/?mibextid=wwXIfr
• LinkedInlinkedin.com/company/ocim-malaysia
• Instagraminstagram.com/ociterrasus
• TikToktiktok.com/@ociterrasus

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 records

Subsidiaries2 records

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about OCI TerraSus