Olive oil just got its own version of a corporate takeover thriller. Shares of Deoleo, the Spanish company that bottles the world's best-known olive oil brands, surged as much as 20% on Wednesday to a fresh 52-week high after reports confirmed a four-country bidding war for control of the company is entering its final stretch.

Spanish agricultural cooperative Dcoop has emerged as the frontrunner with a roughly €470 million ($545 million) offer, according to Spanish outlet El Economista, putting it ahead of a crowded field of rival bidders that includes Italy's Coricelli, Bonifiche Ferraresi and Newlat Food, France's Lesieur (part of the Avril group), and Australia's Cobram Estate Olive, CNBC reported.

Deoleo, listed on the Madrid exchange under the ticker OLE.MC, owns Bertolli and Carbonell, two of the most recognizable olive oil brands on supermarket shelves worldwide, and is widely described as the largest olive oil bottler and marketer on the planet. Wednesday's move marked the stock's strongest single-day gain since March 2022, according to a Yahoo Finance report citing Quartz, as traders bet the sale is finally close to the finish line after months of speculation.

A Deal Years in the Making

The sale process is said to be in its "final phase," with a closing initially expected as soon as September, though nothing has been signed and both companies declined to comment when contacted by reporters. If Dcoop's bid prevails, the deal would knit together two of Spain's largest olive oil operations and hand the combined entity roughly 15% of domestic Spanish consumption — a move framed by Spanish outlets as cementing the country's dominance in a sector it already leads globally alongside Italy and Greece.

The takeover fight comes after a brutal stretch for the olive oil business. Extreme drought, water shortages and disease pressure on groves across the Mediterranean sent olive oil prices spiraling in recent years, squeezing margins for bottlers like Deoleo even as consumers paid record prices at the grocery store. Industry watchers now describe conditions as "more stable" following that period of exceptional volatility, which analysts say has made this a more attractive moment for rivals to make a move on the company.

Deoleo's board and Dcoop both declined to comment on the reported terms, leaving the market to trade on sourcing from Spanish financial press pending an official announcement.

Dcoop, a cooperative that already ranks among the world's largest olive oil and table olive producers, would be adding serious retail muscle to its farming base by absorbing Deoleo's household-name brands and its established distribution network across Europe and the Americas. That vertical combination — from grove to supermarket shelf — is part of what has investors excited, and part of why rivals from three other continents are reportedly still circling even with Dcoop in pole position.

For now, Deoleo shareholders are simply riding the speculation. The stock's pop puts it at its highest level in a year, and traders will be watching for a formal filing or confirmed signing in the coming weeks that would make the deal official — or for a rival bidder to jump the queue before the ink dries.