The Global Undersea Cabling Market was valued at USD 6.12 Billion in 2025 and is projected to reach USD 17.36 Billion by 2034, growing at a Compound Annual Growth Rate (CAGR) of 11.8% during the forecast period (2025–2034). This robust expansion is primarily driven by the accelerating global demand for high-bandwidth connectivity, the massive development of offshore wind farms, and the increasing need for inter-country and island power and data links.

As the backbone of international communication and renewable energy transmission, undersea cables are critical infrastructure for the modern world. In this blog, we profile the Top 10 Companies in the Undersea Cabling Industry—a select group of technology leaders, engineering powerhouses, and strategic innovators who are laying the digital and energy highways across the ocean floor.

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🔟 1. Prysmian Group

Headquarters: Milan, Italy
Key Offering: Fiber optic submarine cables, HVDC power cables, turnkey EPCI projects

Prysmian Group stands as the global leader in the energy and telecom cable systems industry, with a dominant position in the undersea cabling sector. The company boasts an extensive portfolio that includes advanced optical fiber cables for data transmission and high-voltage direct current (HVDC) cables for powering offshore wind farms and interconnecting national grids. Prysmian’s capabilities encompass the entire project lifecycle, from design and manufacturing to installation and maintenance using its fleet of state-of-the-art cable-laying vessels.

Innovation and Strategic Initiatives:

• Pioneering new cable designs with increased capacity and durability for ultra-deep-water applications

• Major supplier for landmark projects like the Google-led Dunant subsea cable and multiple European offshore wind grid connections

• Continuous investment in R&D for lighter, stronger cables and integrated monitoring systems

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9️⃣ 2. Nexans S.A.

Headquarters: Paris, France
Key Offering: Submarine power cables, telecommunications cables, umbilical cables, installation services

Nexans is a global forerunner in advanced cabling solutions, with a strong focus on the undersea market. The company’s offering ranges from inter-array cables for offshore wind farms to transoceanic fiber-optic systems. Nexans operates its own cable-laying vessel, the Nexans Aurora, one of the most advanced in the world, enabling it to execute complex installation projects in harsh marine environments. The company is a key player in Europe’s energy transition, providing critical infrastructure to connect offshore renewable energy to the mainland.

Innovation and Strategic Initiatives:

• Leading role in major European projects such as the Sealink and North Sea Link interconnectors

• Development of green electrification solutions, focusing on sustainable materials and processes

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8️⃣ 3. NKT A/S

Headquarters: Copenhagen, Denmark
Key Offering: High-voltage power cables, HVAC and HVDC submarine cable systems

NKT is a leading supplier of high-voltage power cables,特别专注于海底高压电缆领域。 The company is strategically positioned to capitalize on the boom in offshore wind energy, particularly in the North Sea and Baltic Sea regions. NKT’s high-quality, reliable cable systems are essential for transmitting large volumes of electricity over long distances with minimal losses. The company’s integrated approach, from production at its state-of-the-art factory in Cologne to installation, makes it a preferred partner for critical infrastructure projects.

Innovation and Strategic Initiatives:

• Key supplier for flagship offshore wind projects like DolWin6 and Sofia Offshore Wind Farm

• Investing in capacity expansion to meet the surging demand for HVDC export cables

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7️⃣ 4. Sumitomo Electric Industries, Ltd.

Headquarters: Osaka, Japan
Key Offering: Optical fiber submarine cables, power cables, advanced materials

Sumitomo Electric is a diversified global giant with a long and respected history in the undersea communications cable market. The company manufactures cutting-edge optical fiber cables that form the backbone of the internet, connecting continents with high-speed data links. Leveraging its expertise in materials science, Sumitomo produces robust cables designed to withstand the extreme pressures and corrosive conditions of the deep sea. The company is also a significant player in the Asian market, supporting regional connectivity and digital growth.

Innovation and Strategic Initiatives:

• Continuous development of fibers with higher data capacity, such as those utilizing Space Division Multiplexing (SDM)

• Active participation in consortiums building new transpacific and intra-Asian cable systems

Download FREE Sample Report: Undersea Cabling Market – View in Detailed Research Report

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6️⃣ 5. LS Cable & System

Headquarters: Anyang, South Korea
Key Offering: Submarine power cables, optical fiber cables, umbilical cables

LS Cable & System is a major force in the Asian cable market and an increasingly significant global player. The company provides a comprehensive range of submarine cables for both power transmission and telecommunications. It has been instrumental in supporting South Korea’s ambitious offshore wind goals and is expanding its international footprint by securing contracts in the Americas and Europe. LS Cable’s focus on technological advancement and competitive pricing positions it well in a rapidly growing market.

Innovation and Strategic Initiatives:

• Securing contracts for large-scale projects, including offshore wind farm grid connections in Taiwan and the United States

• Investing in R&D to develop 500kV HVDC submarine cable systems to meet future market demands

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5️⃣ 6. ZTT Group (Jiangsu Zhongtian Technology)

Headquarters: Nantong, China
Key Offering: Optical fiber and submarine cables, power transmission products

ZTT Group, through its subsidiary Jiangsu Zhongtian Technology, has emerged as a dominant player in the global cable industry. The company is a major manufacturer of optical fiber and submarine cables, benefiting from massive domestic demand driven by China’s digital infrastructure expansion and offshore wind development. ZTT’s competitive manufacturing capabilities and growing technological expertise have enabled it to win significant international contracts, challenging established Western and Japanese competitors.

Innovation and Strategic Initiatives:

• Aggressive expansion of production capacity to serve both the domestic Chinese market and international export

• Active involvement in projects linked to the Belt and Road Initiative, enhancing global connectivity

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4️⃣ 7. Furukawa Electric Co., Ltd.

Headquarters: Tokyo, Japan
Key Offering: Optical fiber cables, submarine repeater systems, advanced materials

Furukawa Electric is a veteran in the submarine communications cable industry, renowned for its high-quality optical fiber technology. The company not only manufactures the cable itself but also produces critical components like optical amplifiers and repeaters that are essential for long-distance data transmission across oceans. Furukawa’s deep expertise and reliability make it a trusted supplier for many of the world’s leading telecom operators and consortiums building new international cable routes.

Innovation and Strategic Initiatives:

• Development of low-loss, large-effective-area fibers that enable greater data capacity over longer distances

• Strategic focus on the growing data center interconnect and Asia-Pacific connectivity markets

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3️⃣ 8. Hengtong Optic-Electric (Jiangsu Hengtong)

Headquarters: Suzhou, China
Key Offering: Optical fiber, submarine communication cables, power transmission cables

Hengtong Optic-Electric is another Chinese powerhouse that has rapidly grown to become a key global supplier of submarine cables. The company has made significant investments in manufacturing facilities and technological development, allowing it to compete effectively on the world stage. Hengtong is heavily involved in projects across Southeast Asia, South America, and Africa, providing the critical infrastructure needed for digital inclusion and economic development.

Innovation and Strategic Initiatives:

• Expansion into the submarine power cable segment to capitalize on the offshore renewable energy boom

• Focus on developing integrated solutions that combine power and communication in a single cable

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2️⃣ 9. JDR Cable Systems Ltd. (Part of TFKable Group)

Headquarters: Hartlepool, United Kingdom
Key Offering: Subsea power cables, umbilicals for oil & gas, dynamic cables for floating wind

JDR Cable Systems is a specialized player known for its expertise in complex subsea cable solutions, particularly for the offshore energy sector. The company is a leader in manufacturing dynamic cables for floating offshore wind farms, a key growth area for the future of renewable energy. JDR’s technical proficiency in designing cables that can withstand the constant motion of floating platforms sets it apart. As part of the TFKable Group, it benefits from enhanced resources and a broader geographic reach.

Innovation and Strategic Initiatives:

• Technology leader in dynamic inter-array cables for floating wind turbines

• Strategic focus on the high-value offshore oil, gas, and renewable energy markets

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1️⃣ 10. Hellenic Cables S.A.

Headquarters: Athens, Greece
Key Offering: Submarine and land cables for power transmission and distribution

Hellenic Cables, a member of the Viohalco Group, is a significant European manufacturer with a growing presence in the submarine power cable market. The company supplies cables for interconnecting power grids between countries and for connecting offshore wind farms to the shore. Its strategic location in the Mediterranean positions it well for projects in Southern Europe, the Middle East, and North Africa. Hellenic Cables is investing in expanding its production capabilities to capture a larger share of the evolving market.

Innovation and Strategic Initiatives:

• Key supplier for interconnection projects in the Mediterranean region

• Investment in new manufacturing technologies to produce higher voltage submarine cables

Read Full Report: Undersea Cabling Market – View in Detailed Research Report

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🌍 Outlook: The Future of Undersea Cabling Is Deeper, Smarter, and More Connected

The undersea cabling market is undergoing a profound transformation. While traditional telecommunications cables continue to be vital, the sector is being revolutionized by the dual engines of the green energy transition and exponential data growth. The industry is investing heavily in new technologies, larger vessels, and expanded manufacturing capacity to meet this unprecedented demand.

📈 Key Trends Shaping the Market:

• Offshore Wind Boom: Massive investments in offshore wind farms, particularly in Europe, North America, and Asia, are driving demand for high-voltage export cables.

• Hyperscale Investment: Tech giants like Google, Meta, Amazon, and Microsoft are increasingly funding private cable systems to secure their global data infrastructure.

• Technological Leaps: Development of higher-capacity fibers, integrated monitoring systems, and cables for ultra-deep-water and floating applications.

• Geographic Expansion: New routes are being laid to connect emerging economies in Africa, Southeast Asia, and Latin America to the global digital economy.

Read Full Report: Undersea Cabling Market – View in Detailed Research Report

The companies listed above are not only manufacturing cables—they are enabling the global energy transition and digital future by building the critical infrastructure that lies beneath the waves.