AdC Blocks Boluda's Acquisition of Remolcanosa Portugal — Sines Tug and Mooring Market Saved From Collapsing Into a Monopoly After a December 2025 Phase-2 Probe and Two Rejected Remedy Packages

The Autoridade da Concorrência (AdC), led by Nuno Cunha Rodrigues, today prohibited the proposed acquisition of Remolcanosa Portugal — Serviços Marítimos by Spain's Boluda group. The decision closes a Phase-2 in-depth investigation that opened in late December 2025 and lands as one of the more consequential competition rulings of the year on the maritime-services side, because the affected market is the tug-and-mooring service for non-bulk-hazardous-goods vessels at the Port of Sines.

The AdC's reasoning, set out in the published decision, is unusually direct. Sines today operates as an asymmetric duopoly in this segment, with Remolcanosa Portugal as the only effective competitor to the incumbent. Letting Boluda absorb that competitor would have transformed the structure into a textbook monopoly. The customer side cannot escape the geography — vessels calling at Sines must source tug and mooring services on-port — and the AdC found that entry barriers are high enough that no realistic third operator would emerge in a credible timeframe to discipline pricing.

Two Remedy Packages, Both Rejected

Boluda submitted two separate sets of behavioural and structural remedies during the Phase-2 review. The AdC's board concluded that neither package was 'adequado nem suficiente', citing high risks on effectiveness and viability. The regulator was particularly sceptical of forward-looking arguments about cessação de concessão at the Port of Sines and the prospect of a new public tender procedure that would, in theory, reset the competitive landscape and bring fresh entrants. The AdC characterised those arguments as 'incertos quanto ao âmbito, calendário e resultado' — too speculative to anchor a current monopoly remedy.

Without a remedy that demonstrably preserved competitive constraint at Sines, the board judged that the merged entity would have 'capacidade e incentivo' to exercise market power durably, principally through price increases on the captive customer base of shipping lines, terminal operators and logistics integrators that route through Sines.

Why Sines Specifically

Sines is Portugal's deepest port, the country's main container and energy gateway, and the arrival point for the LNG cargoes that feed Lisbon's gas system and a growing share of the European electricity stack. It is also the landing point for several of the trans-Atlantic and trans-Mediterranean container loops, and the operational anchor of the Sines 4.0 expansion, the Vasco da Gama Terminal pipeline and the data-centre clusters anchored at the Start Campus footprint. The pricing of tug and mooring services is a non-trivial input cost on every vessel call — pass-through goes into shipping rates, terminal fees and ultimately consumer-facing logistics. A monopoly on that input would, in the AdC's reading, have raised the floor on the entire Sines cost stack.

The decision is also a statement about Portugal's growing willingness to push back on Iberian consolidation in regulated infrastructure. Boluda is the dominant Spanish maritime services operator and has accumulated tug-and-mooring positions across major European ports over the last decade. The Sines block is the line.

What This Means for Expat Readers

• Logistics-cost stability. Imported consumer goods, fuel and food cleared through Sines will not absorb a tug-monopoly mark-up. Households should not see this surface in retail pricing.
• Maritime-employment lens. Two operators continue to staff Sines tug and mooring crews. Workers in the Setúbal–Sines belt with relevant maritime credentials should expect the existing dual-employer market to persist for the medium term.
• Investment signal. The AdC has effectively put a marker down for the next round of port-services M&A. Expat-investor allocations to Iberian logistics rollups should price an increased probability of competition vetoes on cross-border concentration deals.
• Sines build-out continuity. The Sines 4.0 capex programme, the LNG terminal expansion, the data-centre construction and the Start Campus power build all rely on a functioning port-services market. Today's block protects the cost base under those projects.
• Appeal pathway. Boluda can challenge the decision at the Tribunal da Concorrência, Regulação e Supervisão. Any appeal would not lift the prohibition during litigation; the deal is dead unless overturned on the merits.

The decision is final at the administrative level. Boluda has the standard window to take the matter to the specialist competition court in Santarém. Remolcanosa Portugal continues as an independent operator at Sines.