Summary

  • Stadtwerke München is reported to have raised its holding in M-net from roughly 63.8 per cent to about 76.8 per cent on 2 July 2026, with Allgäuer Überlandwerk reported at 10 per cent, Stadtwerke Augsburg unchanged at 13.2 per cent and three other municipal co-shareholders reported to have sold out.
  • A cooperation announced in September 2025 between Stadtwerke München, M-net and Telekom Deutschland is reported to target around 550,000 Munich fibre-to-the-home connections, with passive fibre leased from SWM to Telekom via M-net and active bitstream wholesale flowing back from Telekom to M-net.
  • The structural effect is that municipal control concentrates in one owner while contestability shifts from retail rivalry to the governance of wholesale access between a municipal owner, a regional carrier and the national incumbent.

One owner, more control

Two reported changes define M-net Telekommunikations GmbH's present position, and neither is documented here by a commercial-register filing or by contract text that has been inspected.

The first is ownership. Company and trade-press reporting says Stadtwerke München (SWM), the municipal utility of the city of Munich, raised its shareholding in M-net from approximately 63.8 per cent to approximately 76.8 per cent on 2 July 2026 (reported ownership change). Allgäuer Überlandwerk (AÜW) is reported to have increased its stake to 10 per cent, Stadtwerke Augsburg (swa) to have kept 13.2 per cent, and the co-shareholders N-ERGIE Nürnberg, ESTW Erlangen and infra fürth gmbh to have sold their holdings to SWM.

The governance change is larger than the arithmetic suggests. Three municipal minority holders leave the register, and the remaining position is concentrated in a single municipal owner. For a regional carrier whose fibre programme is a municipal project as well as a commercial one, that decides who can still say no to a build, a price or a partner.

The second reported change is a cooperation announced in September 2025 between SWM, M-net and Telekom Deutschland (reported Munich cooperation). Reports date the signing to 22 or 23 September 2025, and this article does not treat either date as settled. The announced scope is roughly 550,000 end-customer connections in Munich, with Telekom connecting 54 SWM fibre nodes; SWM and M-net are described as leasing passive FTTH fibre to Telekom, while M-net receives open-access active bitstream wholesale on Telekom's existing and planned Munich fibre.

That is a swap, not a purchase. Telekom gains passive fibre in a city where civil works are slow and contested; M-net gains an active-layer product reaching premises it has not yet upgraded. The base it is meant to convert is the roughly 650,000 Munich households and business premises that SWM and M-net are reported to have passed with fibre-to-the-building since 2009/2010, with SWM owning the passive infrastructure and M-net responsible for active technology and operations (reported Munich FTTB base). The same reporting puts Munich fibre coverage at about 71 per cent of households in mid-2026 against a stated conversion goal, which means a majority of the municipal footprint still sits on the building-level technology that the cooperation is designed to replace.

Which layer decides the competition

A fibre access business has two separable layers. The passive layer is ducts, fibre and premises connections, which are expensive, long-lived and locally monopolistic. The active layer is the electronics, service platform and handover that turn that glass into a product a retailer can resell. A retail internet provider needs one of the two, and the price and terms of whichever layer it buys determine whether it can compete.

In Munich the reported structure spreads those layers across three parties. SWM owns the passive plant; M-net operates the active network on its own footprint; Telekom both leases municipal passive fibre and supplies active bitstream back to M-net. Each participant is therefore a supplier to, and a customer of, another. That is efficient where duplication would otherwise be unaffordable, and it is also a chain of dependencies in which any single party can become the gatekeeper for the others' retail offers.

The regulatory asymmetry sharpens the point. M-net was reported in 2017, unlike Telekom Deutschland, not to be subject to Bundesnetzagentur price regulation for FTTH/FTTB-based wholesale products, and no market-definition decision has been inspected for this article that would confirm or change that position (reported 2017 regulatory position). If it still holds, municipal ownership is not the same thing as regulated open access: the protection for wholesale customers rests on contract design and competition law, both of which are slower and more contestable than an ex ante price decision. Germany's national Gigabitstrategie, which targets nationwide fibre coverage by 2030 without obliging households to migrate, supplies the political backdrop but no pricing constraint.

Scale and money set the boundaries of what M-net can carry. M-net reported FTTx networks passing 832,000 households and businesses across Bavaria at the end of 2021, and approximately 907,000 connected households with FTTx potential in later reporting; revenue was reported at €271.9 million for 2024 with more than 920 employees as of 2026 (reported network and financial figures). Those are company and trade-press figures, not audited annual-report values, and revenue alone says nothing about the capital intensity of converting a building-passed base into in-apartment fibre.

The municipal record is not a clean one

M-net's municipal ownership has already produced one costly disappointment. In 2017 the company was reported to face a financing gap of roughly €100 million after miscalculations in a fibre rollout in Landkreis Cham, leading to management changes and a capital increase; the reports state that M-net neither confirmed nor denied the exact amount (reported 2017 Cham financing gap). That episode is the reason to read the current expansion as a financing structure, not only a coverage promise. Long-lived passive assets, municipal budget exposure and political timelines move at different speeds, and the one that gives way is usually the timeline.

M-net is also building outside Munich with municipal partners, including a project with AÜW in Weitnau reported to cover 673 private households and 83 commercial units with some districts due by the end of 2027, and the GoAugsburg programme reported to target roughly 12,500 residential and commercial units by 2027. These are announced targets with dates attached, not completed connections, and they should be read as such.

What remains unverified

Four gaps bound the conclusions here. The contract terms of the Munich cooperation — duration, volume basis, pricing, non-discrimination commitments, service levels and termination rights — have not been inspected. Whether the reported stake increase has been recorded in the commercial register, and at what valuation the departing municipal shareholders sold, is not established. M-net's capital expenditure and net debt for 2025 and 2026 are absent, so it is not possible to say whether the reported 2024 revenue is being reinvested or returned to municipal owners.

And the current regulatory classification of M-net's FTTH/FTTB wholesale products remains an open question rather than a confirmed condition.

Three observable events would falsify the reading that this is a genuine re-layering of Munich competition rather than a defence of incumbent position: checkable build figures showing Munich FTTH completions materially below the stated conversion target; a commercial-register filing showing the reported SWM stake change did not complete; or a regulator decision or signed wholesale schedule that prices municipal passive access and Telekom active bitstream on terms that third-party retailers can actually buy.

M-net's directory record is maintained at M-net Telekommunikations GmbH.