For four years, the most unusual line in the accounts of Portugal’s biggest retailer has been a fish farm above the Arctic Circle that had never sold a fish. That changed in the last days of June. Andfjord Salmon, the Oslo-listed, land-based aquaculture company in which Jerónimo Martins has been steadily building a stake since 2022, completed its first-ever commercial sale — roughly 450,000 post-smolt delivered to neighbouring farmer Eidsfjord Sjøfarm — and with it, the first revenue in one of the boldest Portuguese corporate bets anywhere in the Nordics.
The milestone. The sale, agreed for mid-June and executed ahead of the company’s original schedule, moved fish from pool K1 at Andfjord’s flagship site at Kvalnes, on the island of Andøya in Norway’s Vesterålen archipelago. Stronger-than-expected growth allowed the company to bring the transaction forward; around 300,000 fish remain in the pool for grow-out to harvest size. “Our inaugural post-smolt sale is an important milestone as it demonstrates how our infrastructure solutions enable scaling and optimisation of pool capacity and production, which shortens our runway to revenue and improves our cash flow,” chief executive Martin Rasmussen said when announcing the accelerated timetable in late May.
Why the biology matters. Andfjord’s pitch to investors has always rested on its flow-through technology: rectangular pools dug into the island’s shoreline, gravity-fed with clean, oxygen-rich seawater drawn from the Gulf Stream, promising the biological control of land-based farming without the energy bills of fully recirculating systems. The operating data now backs the pitch. As of late May, survival rates in the two operational pools stood above 99% — 99.17% in pool K0 and 99.24% in K1 — extraordinary figures in an industry where conventional net-pen farming routinely loses 15% or more of each generation. Standing biomass reached 1,584 tonnes, with feed-conversion ratios of 1.03 and 0.93 respectively.
The Portuguese connection. Jerónimo Martins — owner of Pingo Doce in Portugal and Biedronka in Poland — entered Andfjord’s shareholder register in 2022 through its agribusiness arm, Jerónimo Martins Agro-Alimentar, and has kept buying ever since. According to Portuguese business daily ECO, the group has invested around €115 million across successive capital raises, injecting a further €20 million in early 2026 and lifting its holding to just under 40%. When Andfjord raised NOK 385 million (about €35 million) in a private placement this spring to fund its next construction phase, the Portuguese group participated again. What began as a strategic hedge — a retailer securing future protein supply — has become something closer to industrial ownership of a Norwegian aquaculture platform.
The strategic logic. For a food retailer selling millions of kilos of salmon a year across Iberia and Poland, vertical integration into farming is a defence against one of the most volatile commodity markets in food. Salmon spot prices swing violently; land-based, predictable-volume production offers a way to smooth both supply and cost. Jerónimo Martins has said it expects its first revenues from salmon sales in 2026 — a promise that, as of this quarter, Andfjord has begun to keep.
Scaling up. The company is not pausing at the milestone. Around 550,000 smolt were released into pool K3 in early June, making it the third pool in operation at Kvalnes, and fixed-price construction contracts have been signed with Norwegian contractor Entreprenør Harald Nilsen for pools K5 and K7, while K2 and K4 are being completed. Andfjord also strengthened its bank financing during the first quarter, increasing its total facility by NOK 200 million to NOK 1.5 billion, of which NOK 600 million remains undrawn. The first quarter still showed the arithmetic of a pre-revenue builder — operating income of just NOK 0.1 million against a net loss of NOK 23.9 million — but the June sale marks the start of the commercial phase the entire build-out has been aiming at.
The corridor pattern. The deal is the clearest current example of an underappreciated corridor dynamic: Portuguese capital operating inside the Nordic real economy, not merely exporting to it. The usual traffic on this corridor runs north-to-south — Danish solar developers in the Alentejo, Swedish industrial buyers in Leiria, Norwegian shipping offices in Setúbal. Jerónimo Martins’ Arctic salmon position runs the other way, and at a scale — €115 million and a near-40% stake — that makes it one of the largest single Portuguese corporate investments in Norway.
There is a long way between a first post-smolt sale and the 90,000-tonne annual harvest ambition Andfjord has sketched for its three Andøya sites. Land-based aquaculture remains littered with projects that proved biology at small scale and stumbled at large. But for the corridor scoreboard, the entry is now unambiguous: a Portuguese retailer helped finance a new model of Norwegian fish farming, and in June 2026 it started paying back — one pool, and 450,000 fish, at a time.