Subsea cable networks -- the fibre optic cables that run along the ocean floor and carry the vast majority of the world's international internet and telecommunications traffic -- have been a foundational component of global digital infrastructure for three decades, but they have recently undergone a transformation in their commercial structure, ownership model, and geopolitical significance that is reshaping how they are financed, built, and operated. The traditional model of subsea cable development -- industry consortia of telecom carriers sharing the cost and capacity of new cable systems in proportion to their traffic needs -- has been substantially disrupted by the entry of hyperscaler technology companies as direct cable owners and investors. Google, Meta, Microsoft, and Amazon have collectively become the largest funders of new subsea cable capacity over the past five years, either through wholly owned private cable systems or as significant equity investors in consortium cables, driven by the growth of their own traffic volumes to a scale where private cable ownership is more economical than purchasing capacity on third-party systems.
The hyperscaler entry has changed the economics and planning horizon of subsea cable investment in fundamental ways. The major technology companies have traffic growth visibility that allows them to commit to multi-decade cable investments without the demand uncertainty that telecom carriers face in wholesale capacity markets. Their financial capacity to fund large-scale cable infrastructure without the debt financing constraints that smaller cable developers face has enabled them to fund cable systems in geographies and on routes where the commercial case for third-party telecom carrier investment was marginal. And their stated preference for route diversity and resilience -- connecting their data centre footprint through multiple geographically redundant cable paths rather than relying on the shared infrastructure that carrier-owned cables provide -- is driving cable construction to regions and across routes that would not have attracted investment on commercial capacity demand alone.
Geopolitical Risk and the Strategic Infrastructure Classification
Subsea cables have always been strategically important -- they were targets for intelligence gathering and sabotage in both World Wars -- but the current geopolitical environment has elevated their strategic significance to a level that is generating active government policy responses across multiple jurisdictions. The physical vulnerability of subsea cables to intentional damage was dramatically illustrated by the suspected sabotage of the Nord Stream gas pipelines in 2022 and by the documented damage to cables in the Baltic Sea in late 2024 and early 2025 that cut connections between Finland, Germany, Sweden, and Lithuania and that investigators linked to physical anchoring of a vessel on the cable route rather than a direct cutting operation. These incidents confirmed what intelligence agencies had been warning for years: that adversaries have both the capability and the motivation to damage undersea infrastructure as a tool of below-threshold conflict.
The response from Western governments has been a combination of investment in cable monitoring and protection capability and a new scrutiny of the ownership and landing rights of subsea cable infrastructure. The US government has moved to restrict Chinese telecommunications companies from participating in cable systems with US landing points, citing national security concerns about access to traffic and the potential for interference with cable operations. The UK, Australia, and EU member states have adopted or are developing similar frameworks that subject cable infrastructure investment to foreign investment screening processes and that in some cases mandate domestic control of cable landing stations. These restrictions are reshaping which companies can participate in cable consortia on sensitive routes and are creating a bifurcation in global cable infrastructure between systems connected to Western economies and systems that connect to China and its strategic partners.
Cable Manufacturing and the Alcatel-SubCom Duopoly
The manufacture of subsea cable -- the physical fibre optic cable and the repeater amplifier units that are integrated into deep-sea cable systems -- is one of the most concentrated industrial markets in the world. Four companies -- SubCom (US, formerly TE Connectivity Subsea), Alcatel Submarine Networks (France, Nokia subsidiary), HMN Technologies (Singapore, formerly Huawei Marine Networks), and NEC (Japan) -- manufacture the vast majority of the world's subsea cable supply. The manufacturing capacity constraints and long lead times of subsea cable production -- large cable ships that lay the cable are booked years in advance and cable manufacturing facilities have limited throughput -- create bottlenecks in the delivery timeline for new cable systems that are extending project completion dates and that have been a constraint on the pace of hyperscaler cable investment despite the financial capacity to move faster.
The strategic sensitivity of the cable manufacturing base has attracted government attention: HMN Technologies' status as a former Huawei subsidiary has made it effectively inaccessible for cables with Western government or hyperscaler involvement in sensitive routes, concentrating the addressable order book further toward SubCom, Alcatel Submarine Networks, and NEC. The US government has provided funding support to SubCom as part of its Indo-Pacific strategy to ensure Western cable manufacturing capacity remains available for strategic cable projects, and the geographic concentration of cable ship capacity in a small number of specialist vessels that are operated globally has created logistics bottlenecks that governments and developers are increasingly aware of as potential strategic vulnerabilities.
New Routes and the Global Connectivity Gap
The geographic distribution of subsea cable investment is shifting as hyperscaler data centre buildout, government digital connectivity programmes, and the commercial opportunity in underserved markets attract cable development to routes and regions that were previously served by limited or ageing cable infrastructure. The Africa coast -- historically served by a small number of consortium cables with limited capacity relative to the continent's population -- has seen a wave of new cable investment from both hyperscalers and commercial cable developers seeking to provide the connectivity infrastructure that African digital economy growth requires. Google's Equiano cable along the African west coast, Meta's 2Africa system that encircles the African continent, and the SubCom-built PEACE cable connecting Asia to Africa and Europe through the Middle East are all bringing substantial new capacity to regions where bandwidth costs had previously constrained internet adoption and digital service development.
The Pacific island nations, Southeast Asian archipelago markets, and the polar shipping routes that are opening as Arctic ice retreats are all cable development frontiers where the combination of connectivity gaps and strategic interests is attracting investment. The polar route cables that would connect Asia and Europe through the Arctic Ocean are a particular area of geopolitical interest because they offer the potential for a route that bypasses the chokepoints of the Suez Canal and Southeast Asian straits, but they face extraordinary engineering challenges from ice-affected seabed environments and the regulatory complexity of Arctic territorial waters.
Top 10 Companies in This Space
- SubCom LLC -- US subsea cable manufacturer and deployer, major cable ship operator and end-to-end cable system supplier
- Alcatel Submarine Networks (Nokia) -- French cable manufacturer, Nokia subsidiary and leading European-origin subsea cable system supplier
- NEC (Submarine Network Division) -- Japanese cable manufacturer, major Asia-Pacific subsea cable supplier and network system integrator
- Google (Subsea Cable Investments) -- US hyperscaler, largest private funder of subsea cable infrastructure with wholly owned systems on multiple routes
- Meta Platforms (2Africa / Marea) -- US hyperscaler, 2Africa encircling Africa and Marea transatlantic cable as part of major private cable investment portfolio
- Orange Marine -- French telecom's cable ship and maintenance arm, cable laying and maintenance services as a commercial service alongside Orange's own cable interests
- Global Marine Group -- UK cable installation and maintenance company, cable laying vessels and repair services for independent and telecom carrier cables
- HMN Technologies (formerly Huawei Marine) -- Singapore-based cable manufacturer, active in non-Western-aligned cable routes following Huawei divestiture
- PCCW Global -- Hong Kong telecom, subsea cable investments and capacity management in Asia-Pacific routes
- Aqua Comms (AquaComms) -- Irish subsea cable operator, transatlantic cable systems serving hyperscaler and enterprise wholesale capacity demand
Our Take
Subsea cable infrastructure has crossed from a commercial telecom asset to a strategic national infrastructure category, and the investment, policy, and security implications of that reclassification are still playing out. The hyperscaler takeover of cable funding is positive for the pace of global capacity buildout but is concentrating control of international internet infrastructure in a small number of US technology companies in ways that non-US governments and telecom regulators are beginning to scrutinise. The manufacturing bottleneck at SubCom and Alcatel Submarine Networks is a real constraint on deployment timelines and a strategic vulnerability that government investment is beginning to address. For investors, the direct cable operator and cable ship operator segment is the most accessible commercial exposure to this infrastructure theme; the hyperscaler cable investment is embedded in the economics of the companies making it rather than separately measurable. The geopolitical bifurcation of cable networks is a decade-long structural trend that will produce two distinct cable ecosystems: a Western-aligned system and a China-linked system, with decreasing overlap between them. -- Elena Vasquez, MarketsNXT