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Fiber & Connectivity

Fiber & Connectivity encompasses the optical transport infrastructure - metro, long-haul and subsea fiber networks - that links data centers to each other and to end users, built by equipment vendors, cable and connector manufacturers, carriers, tower operators and colocation providers. The sub-theme is currently being reshaped by AI- and cloud-driven bandwidth demand, with carriers and equipment vendors expanding fiber builds and data-center interconnection capacity, even as trade and tariff exposure, tower-customer concentration, and a wave of new subsea cable capacity shape the near-term outlook.

Active institutional exposure flipped from a net outflow of $10.4 billion in Q1 2026 to a net inflow of $25.9 billion in Q2 2026. 38.9% of companies in this sub-theme saw increased active positions in Q2 2026.

Overview

Fiber & Connectivity covers the physical optical-network layer that links data centers to each other and to end users across metro, long-haul and subsea routes, excluding intra-cluster interconnects. The ecosystem spans optical transport and networking equipment vendors (Ciena, Nokia, Lumentum), fiber and connector/cable manufacturers (Corning, Amphenol, Belden), high-speed connectivity semiconductor suppliers (Credo Technology, MaxLinear, Broadcom, Nvidia), carriers that own and operate fiber and wireless backhaul networks (AT&T, Verizon, T-Mobile, Lumen, Orange, Vodafone, Swisscom, SK Telecom), tower and passive-infrastructure operators (American Tower, Crown Castle) that host backhaul and small-cell connections, and data-center/colocation operators (Equinix, Digital Realty) that terminate and interconnect these networks. Corning supplies optical fiber and cable to carriers including AT&T and Verizon; Ciena, Nokia and Lumentum supply optical transport systems used in metro and long-haul networks; Credo, MaxLinear and Broadcom supply high-speed interconnect and networking semiconductors that also compete with each other; Amphenol and Belden compete with Corning in connector and cable products; and American Tower and Crown Castle lease tower and backhaul-adjacent infrastructure to wireless carriers such as AT&T, Verizon and T-Mobile. Equinix and Digital Realty operate the colocation and interconnection facilities where these networks terminate, in some cases through joint ventures such as Digital Realty's partnerships with Blackstone and Realty Income.

Investment Thesis

Growth Drivers
Risks
What Could Change This

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Bottleneck Tracker

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Key Companies

Related Events

GeopoliticalCanada and EU Move Toward Associate MembershipOct 30, 2026

Canada and the EU are deepening ties to reduce reliance on the US, which took 71.7% of Canadian merchandise exports in 2025. European Investment Bank financing could open a new capital source for Canadian critical minerals miners. Canada's access to the JUPITER supercomputer and the new digital trade pact favor Canadian tech and research firms. A feasibility study on Canadian LNG exports to Europe and new subsea cable plans could create longer-term infrastructure opportunities. Trump's tariff threats against Europe over the arrangement add trade-risk uncertainty, and the joint declaration's silence on formal associate membership leaves the final structure unresolved.

GeopoliticalEU Unveils Arctic Strategy Amid Greenland ThreatsOct 21, 2026

The EU's Arctic strategy signals a shift toward funding hard security and infrastructure in the High North, with spending on sensors, cameras, satellites, subsea cables and icebreakers. Suppliers of subsea cable, maritime surveillance and satellite capabilities stand to gain from EU-backed procurement. A sovereign Greenland-EU cable and a cable monitoring center raise demand for subsea fiber and repair capacity. Expanding Europe's icebreaker fleet, which is around 10 ships versus Russia's roughly 40, favors Nordic shipbuilders. The plan also deepens transatlantic friction over Greenland and reinforces Europe's push for strategic autonomy, though the details and budgets remain unspecified.

TechnologyCisco, Nvidia unveil 12.8 Tbps USFP opticOct 15, 2026

A pluggable optic at 12.8 Tbps would sharply raise bandwidth density for AI cluster cabling, favoring optical module, DSP and laser suppliers who can meet 400G-per-lane and 100 W thermal demands. Nvidia's participation, despite its move to co-packaged optics on its switches, shows pluggables remain strategic for NICs and flexible deployments. The open standard widens the addressable market beyond Cisco and Nvidia but raises thermal, reliability and blast-radius challenges for module and cage makers. Microsoft's use of Cisco's P200 for scale-across networking strengthens Cisco's position against Nvidia Spectrum-XGS and Broadcom Jericho 4. Commercial impact is gradual, tied to 204.8 Tbps switches and Vera Rubin Ultra-class racks later in the decade.

SectorSamsung Invests $1B in Helix AI InfrastructureSep 29, 2026

The investment gives Samsung a strategic foothold in one of the largest privately funded AI infrastructure platforms, positioning its semiconductor, battery, cooling and construction affiliates as potential suppliers to Helix's global data center and power buildout. For Helix, the added $1 billion strengthens its capital base beyond $10 billion, reinforcing its ability to compete for hyperscale data center, power generation and fiber contracts against rival infrastructure funds. The deal underscores accelerating capital concentration in AI infrastructure, with sovereign wealth funds, private equity and strategic industrial investors like Samsung co-investing alongside chipmakers such as Nvidia. Markets reacted positively to Samsung's shares, reflecting investor expectation of downstream demand for its memory and industrial products. Longer term, the tie-up could deepen cross-affiliate collaboration within the Samsung group around AI data center supply chains.

SectorVerizon Signs $1B Dark Fiber Deal for Google Data CentersJul 27, 2026

This deal signals a structural shift in how hyperscalers procure connectivity: dedicated dark fiber contracts rather than managed bandwidth services, which durably benefits fiber infrastructure owners and disadvantages managed-service-only carriers. Verizon gains a recurring, high-margin revenue stream tied directly to AI infrastructure buildout rather than consumer broadband cyclicality. Other dark fiber providers and long-haul fiber network operators are positioned to win similar hyperscaler contracts as AI campus buildouts accelerate globally. Traditional telecom managed-bandwidth revenue faces substitution pressure as large cloud operators bypass shared networks. Equipment suppliers in fiber splicing, DWDM, and optical networking benefit from the associated capacity upgrades.