Benfica and Sporting dominated the Primeira Liga transfer market this summer, both raiding Serie A, while Sporting also broke its transfer record on a domestic rival. Porto also made a smart permanent move on a loan star. Below are the ten biggest confirmed Primeira Liga transfers of summer 2026, ranked by fixed fee excluding add-ons and counting down to the biggest deal of the window. All figures are in euros.

10. João Palhinha: Bayern Munich to Benfica

Benfica secured a marquee return to Portugal for João Palhinha. The move is worth 14 million euros, plus five million in achievable objectives. Palhinha previously starred for Sporting before moving abroad via Fulham and Bayern Munich. He has signed a contract running until June 2030.

9. Nestory Irankunda: Watford to Sporting

Sporting won the race for Australian World Cup star Nestory Irankunda from Championship side Watford. The deal is reported at 16 million euros, potentially rising past €18m with add-ons. Bayern Munich, his former club, are due a hefty cut through a sell-on clause. Irankunda has signed a long-term contract with the Lisbon giants.

8. Jakub Kaminski: Köln to Benfica

After a 1-year loan from Wolfsburg, FC Köln bought the player for 5.5 million euros. However, quickly after that, Benfica triggered a release clause to sign Polish winger Jakub Kaminski. The activated clause was set at 17 million euros, with Köln banking a healthy profit. Kaminski scored seven goals for Köln last season after arriving on loan from Wolfsburg. He has signed a five-year contract with a €60m release clause.

7. Jakub Kiwior: Arsenal to Porto

Porto made permanent what had been a hugely successful loan, signing Jakub Kiwior outright from Arsenal. The buy option was set at €17 million + €5 million performance bonuses. Kiwior helped Porto win the Primeira Liga title during his loan season. He has signed a contract through June 2030 with a €70m release clause.

6. Alessandro Circati: Parma to Benfica

Benfica signed Australian World Cup defender Alessandro Circati from Parma to bolster their backline. The fee is reported at 18 million euros, plus two million in performance add-ons. Circati came through Parma's academy and helped them win promotion to Serie A. He has signed a contract running until June 2031.

5. Sergi Altimira: Real Betis to Sporting

Sporting completed the signing of Spanish midfielder Sergi Altimira from Real Betis. The official figures show 18.25 million euros, with up to two million more in bonuses. He has signed a five-year deal with an €80m release clause.

4. Georgiy Sudakov: Shakhtar Donetsk to Benfica

Benfica first brought in Ukrainian midfielder Georgiy Sudakov on loan last season, paying Shakhtar Donetsk a loan fee of 6.75 million euros for the 2025/26 campaign. That deal included a mandatory permanent clause worth 20.25 million euros, with a further €5m in variables, taking the total package to a possible 25.25 million euros. Shakhtar retain a 25% sell-on stake, reducible to 15% for a €6m payment. Sudakov has now become a full Benfica player after helping the club challenge domestically last season.

3. Ibrahima Ba: Famalicão to Sporting

Sporting moved fast to sign Senegalese defender Ibrahima Ba after a rival deal collapsed on medical grounds. The official fee stands at 21.25 million euros, with Famalicão also holding a resale percentage. Ba arrives as cover following Ousmane Diomande's exit to the Premier League. He has signed a five-year contract with an €80m release clause.

2. Issa Doumbia: Venezia to Sporting

Sporting signed Italian midfielder Issa Doumbia in a deal that stands as the record sale in Venezia's history. The fee is reported at 23 million euros, plus additional bonuses. Doumbia scored 10 goals last season as Venezia won promotion to Serie A. He has signed a contract running until June 2031.

1. Rodrigo Zalazar: Sporting Braga to Sporting

Sporting broke their transfer record to sign Uruguayan playmaker Rodrigo Zalazar from domestic rivals Sporting Braga. The fixed fee is set at 30 million euros, surpassing the club's previous record for Viktor Gyökeres. Zalazar scored 23 goals for Braga last season. He has signed a five-year contract with an €80m release clause.

Sporting, the biggest spenders in the Primeira Liga this summer, have completely overhauled their midfield and defence. The extensive rebuild appears to be aimed at addressing the weaknesses that proved costly last season, when Porto went on to claim the league title.