Nokia (NOK) ☆

5G core, autonomous-network and network-automation software, delivered SaaS-first; the Core Networks business under the 2025 structure, renamed Core Software inside Mobile Infrastructure from 1 January 2026.

This is the best-sourced leadership claim in the filing. The 20-F says: "In Core Networks, we hold a leading position in the telecommunications market, with our technology present in 65% of telecommunication providers' 5G SA networks... with the highest number of 5G SA core operator customers and live deployments worldwide." One caveat: Omdia's cited first places (portfolio competitiveness, Core SaaS, cloud-native readiness, automation, 5G deals) and Appledore's first place in AI Ops and Cross-Domain Service Orchestration are capability rankings rather than revenue share, so the share-like evidence rests on the 65% penetration and the deployment count.

Software embedded in 65% of 5G SA cores implies real replacement friction, but the 20-F never claims a switching cost and is explicit that the position was earned "by being early to invest in cloud innovation, containerization, multi-cloud support, and flexible deployment options" — a lead rather than a lock. Appledore ranks Nokia only number two in Network Automation Software.

Fiber and broadband access equipment. Fixed Wireless Access CPE moved out of this unit into Portfolio Businesses on 1 January 2026, leaving PON access as the core.

The 20-F states a "global number one position in xPON OLT for the sixth consecutive year" and "number one in 10G (XGS PON) ONT/OLT", both footnoted to "Omdia and Dell'Oro Q3'25". The cited first place covers this unit's principal product category rather than one slice of several, and it survives the 1 January 2026 removal of FWA CPE to Portfolio Businesses. The leadership is in PON access, not in fixed broadband generally.

Six consecutive years at number one evidences durability, but this is telco capex equipment sitting inside the same risk factor as the rest of the portfolio: "equipment price erosion and aggressive price competition", with customers "reverting to vendors to compensate" for their own unit-revenue erosion. The filing asserts no switching cost or contractual lock-in for Fixed Networks.

IP routing and data-center switching for telecom providers, AI & Cloud customers and mission-critical enterprises.

The only third-party-sourced number one is narrower than the unit: the 20-F claims "the number one global position in IP edge routing", footnoted to Dell'Oro Q3'25, which is one slice rather than IP Networks as a whole. The broader statement that "IP Networks continued to lead in its sector" is company self-description with no analyst citation. In the data-center switching half of the unit the same filing concedes "we compete against large incumbent players... making expansion challenging" and describes 2025 results only as "encouraging proof points" and "design wins". A unit that is first in one category and a self-described new entrant in another sits at challenger overall.

The barrier is moderate and applies only to edge routing. The 20-F claims no switching cost, no contractual lock and no installed-base advantage for IP Networks. The data-center push runs on merchant silicon — the 7220 IXR H6 is "powered by Broadcom's Tomahawk 6 chipset" per the 20-F — which is the opposite of a proprietary barrier.

Optical transport for metro, regional, long-haul and data-center interconnect; strengthened by the Infinera acquisition closed and integrated in 2025.

The 20-F describes Nokia as "building on our number two global market position", footnoted to Dell'Oro Q3'25. Number two is top-three rather than outright leadership, and the band reflects that.

The 20-F cites real assets: "9/10 of the top global hyperscalers use Nokia's optical networks", 1.2T/1.6T coherent transponders, 800G ZR/ZR+ pluggables, vertical integration across hardware and software, and own fab capacity for optical components. But the filing frames the 800G supply crunch as an industry-wide supply-chain risk to Nokia — "demand will outstrip supply in the coming years" — not as a Nokia pricing advantage, so treating optical as supply-tight in Nokia's favor would go beyond the text.

Radio access network products and services; the largest single business unit by revenue under the 2026 structure (EUR 1 765m of EUR 4 815m group net sales in Q2'26).

The 20-F states that "Analyst firms like Dell'Oro and Omdia ranked Nokia third in global Mobile RAN market share for the first three quarters" — third, not first. The filing names no competitor in this context: it does not rank Nokia against Ericsson or Huawei and says nothing about market exclusions, so no such framing is applied here.

The 20-F offers positive evidence: 408 commercial 5G agreements, "the fastest 5G in 15 of the 20 fastest 5G countries", over 1 000 private wireless customers and 18 new telecom customers gained in 2024-2025. The same filing's risk factors cut the other way, describing "equipment price erosion and aggressive price competition" and customers consolidating suppliers "all the way to a one-supplier model, for instance in a specific product area". The Mobile Networks segment earned a 2.8% operating margin in 2025 against 5.5% in 2024, and the filing claims no deep barrier.

Cellular, multimedia and WiFi standardization and patent licensing. Reported as the Nokia Technologies segment through FY2025; from 1 January 2026 it is the Technology Standards business unit inside the new Mobile Infrastructure segment.

Market share here is not knowable from the disclosure. The 20-F gives portfolio scale — "more than 26 000 families, including over 8 000 essential to 5G" and "more than 250 licensees across all our programs, including companies like Apple, Samsung, Lenovo, and Mercedes-Benz" — but never a share of the SEP-licensing market, and cites no third party for one. Any ranked band would therefore be unsourced.

The 20-F supports a deep barrier: "The strength of our assets has made it possible for us to successfully secure the vast majority of our patent licensing agreements without resorting to litigation", alongside "annual contracted recurring revenue of over EUR 800 million through 2030" and expansion programs in automotive, consumer electronics, IoT and multimedia at a run-rate above EUR 200m a year. One constraint tempers it: declared-essential patents carry a FRAND obligation, which the 20-F glossary defines and whose risk factors concede "not all intellectual property owners agree to apply such terms".