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Investment Surge in Subsea Cable Infrastructure Amid Growing Data Demand

Investment Surge in Subsea Cable Infrastructure Amid Growing Data Demand

First seen 15 Oct 2026, 13:33 UTC • •
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ThreatCluster AI
ThreatCluster •October 16, 2026 at 00:38 UTC
  • •Subsea cables carry over 99% of intercontinental data traffic.
  • •International bandwidth demand is projected to double every three years.
  • •Investments in subsea infrastructure are critical for supporting the AI boom.

Subsea cables are critical for global data traffic, carrying over 99% of intercontinental data. Demand for international bandwidth is expected to double every three years, necessitating significant investments in new cable systems and maintenance infrastructure. Recent joint ventures, such as between BT International and Verizon, highlight ongoing investment in the sector. Freshfields is advising on these developments, including CPP Investments' acquisition of a majority stake in Tarchon, a planned subsea electricity interconnector. The commercial model for subsea cables is capital-intensive, with substantial costs incurred before service begins. Investors can engage through consortiums or special-purpose vehicles, often backed by sovereign wealth funds. The expected lifespan of these cables is around 25 years, with revenue generated through capacity sales or leases.

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Timeline

Recent
BT International and Verizon joint venture
BT International and Verizon formed a joint venture for subsea cable infrastructure, with Freshfields advising BT Group.
Freshfields
Recent
CPP Investments acquires stake in Tarchon
CPP Investments acquired a majority stake in Tarchon, a planned subsea electricity interconnector between Germany and the UK.
Freshfields

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Common questions

What is the significance of subsea cables?
Subsea cables are essential for global data transmission, carrying more than 99% of intercontinental data traffic.
How is investment in subsea cables changing?
Investment is increasing significantly due to the doubling demand for international bandwidth projected every three years.
What are the commercial models for investing in subsea cables?
Investors can participate through consortiums or special-purpose vehicles, often involving substantial upfront costs.