What ACM Decided
On June 8, 2026, the Dutch Authority for Consumers and Markets (ACM) prohibited Glaspoort B.V. — a joint venture of incumbent telecom operator KPN and pension administrator APG — from acquiring part of DELTA Fiber Netwerk B.V.'s fiber-optic infrastructure, covering roughly 200,000 households across multiple municipalities. ACM's own summary is blunt: the deal would have left households in the affected areas with "only two competing fixed telecom networks" — KPN's and VodafoneZiggo's — down from three (ACM, June 2026).
The regulator's formal denial (an eindmededeling, or final notice) confirms the transaction was first notified on December 18, 2024 and rejected roughly eighteen months later, with the companies now free to appeal to the Rotterdam District Court within six weeks (ACM eindmededeling). KPN and APG have not announced an appeal, but their public reaction leaves the door open.
Steelmanning the Deal
Fiber-to-the-home buildout is brutally capital-intensive, and the Netherlands has more overlapping fiber infrastructure than almost any EU peer — a legacy of aggressive, competitive rollout since 2021 that pushed Delta and other independent operators to lay parallel cable in areas KPN and VodafoneZiggo already served. Consolidating some of that duplicated infrastructure into fewer, better-utilized networks is not an unreasonable ambition: it can lower per-connection costs, accelerate the retirement of copper lines, and free capital for players like Delta to build in genuinely underserved rural areas instead of competing street-by-street with an incumbent. KPN itself argued this was a comparatively modest transaction, stating plainly that "the parties do not see why this relatively small transaction warrants the strongest measure available to ACM, i.e. prohibition" (KPN Investor Relations, June 2026). That is a fair objection to raise, even if ACM ultimately rejected it.
Why ACM Said No
ACM's reasoning goes beyond simple network-counting. The regulator found that telecom retailers without their own infrastructure — Odido and Budget among them — would become "entirely dependent on access to KPN's network," because VodafoneZiggo does not offer wholesale access to competitors on comparable terms (ACM, June 2026). That is the crux of the case: it is not merely a local competition problem in 200,000 households, but a structural one, since Delta functions as an open-access network that any retailer can use. Losing that model would convert access-dependent competitors into permanent price-takers on KPN's terms in the affected areas.
ACM also flagged a national dimension. Delta is described as reaching roughly one in five Dutch households, making it the country's most significant independent fiber competitor to KPN at scale, not just a regional player (Emerce, June 2026). Chipping away at that position piece by piece, ACM concluded, would erode competitive pressure on KPN nationally over time — exactly the kind of cumulative, hard-to-reverse harm competition law exists to catch before it compounds.
The Missing Remedies Debate
Here is where the pro-innovation case gets more complicated. ACM says it examined remedies KPN and Glaspoort proposed and found none sufficient — but neither ACM's press release nor its final notice details what those remedies actually were, or why structural alternatives (for instance, a divestiture conditioned on preserving Delta's open-access wholesale model, or a firewall guaranteeing equal-terms access for Odido and Budget) couldn't have addressed the dependency concern without an outright ban (Telecompaper, June 2026). A full prohibition is the bluntest tool ACM has, and using it without a transparent account of why lighter-touch conditions failed makes the decision harder for outside observers — and for future merging parties — to evaluate on its merits.
The Netherlands is unusual in having three real, competing fixed networks in many areas at all. That is worth protecting — but protecting it by opaque prohibition rather than reasoned remedy analysis sets a weaker precedent than the outcome deserves.
The Bottom Line
On substance, ACM's competitive analysis is sound: preserving genuine infrastructure competition, especially an open-access network that smaller retailers depend on, is squarely aligned with consumer choice and long-run innovation in broadband markets — outcomes this publication generally wants regulators to protect. But proportionate regulation also means showing your work on remedies before reaching for prohibition, particularly in a capital-intensive sector where some consolidation is inevitable and even efficient. ACM got the right result here. It should publish more of the remedy analysis behind it, so the next fiber operator weighing a deal — and the next regulator watching from Brussels or beyond — knows exactly where the line sits.