Southampton 2025 summer transfers: Every confirmed signing and sale for Will Still's side

Southampton's squad underwent considerable changes during the summer transfer window, which saw the departures of Tyler Dibling and Matheus Fernandes to Premier League clubs.

The Saints reinvested the funds raised from sales to make several additions to Will Still's squad, including the signings of Casper Jander, Finn Azaz, Tom Fellows and Damion Downs.

Leo Scienza wrapped up Southampton's summer transfer activity when he completed his permanent switch from Heidenheim on transfer deadline day. 

The Saints will surely believe they have a squad capable of securing an immediate return to the top-flight following last season's relegation.

With the window now closed, Southampton will begin to turn their focus to the highly anticipated South Coast derby against rivals Portsmouth on September 14. 

Here, Sports Mole follows all of Southampton's incomings and outgoings during the 2025 summer transfer window.

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Southampton confirmed transfers in: Summer 2025

Joshua Quarshie (£3.5m from Hoffenheim)

Damion Downs (£6.9m from Cologne)

Mads Roerslev (undisclosed from Brentford)

George Long (loan from Norwich City)

Caspar Jander (£10.4m from Nurnberg)

Finn Azaz (£12m from Middlesbrough)

Tom Fellows (£8m from West Bromwich Albion)

Elias Jelert (loan from Galatasaray)

Leo Scienza (undisclosed from Heidenheim)

Southampton confirmed transfers out: Summer 2025

Kamaldeen Sulemana (£18m to Atalanta BC)

Jan Bednarek (£6.5m to Porto)

Samuel Amo-Ameyaw (£5.9m to Strasbourg)

Paul Onuachu (undisclosed to Trabzonspor)

Aaron Ramsdale (loan to Newcastle United)

Kyle Walker-Peters (free to West Ham United)

Joe Lumley (free to Bristol City)

Juan Larios (loan to Cultural y Deportivo Leonesa)

Adam Lallana (retired)

Adli Mohamed (undisclosed to Al-Nasr)

Ollie Wright (loan to Accrington Stanley)

Rento Takaoka (loan to Valenciennes)

Princewill Ehibhatiomhan (loan to Swindon)

Daouda Traore (loan to Real Betis)

Tyler Dibling (£40m to Everton)

Yukinari Sugawara (loan to Werder Bremen)

Armel Bella-Kotchap (loan to Hellas Verona)

Mateus Fernandes (£38.1m to West Ham United)

Ben Brereton Diaz (loan to Derby County)

Charlie Taylor (loan to West Bromwich Albion)

James Bree (loan to Charlton Athletic)

Will Smallbone (loan to Millwall)

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How much have Southampton spent and earned during the summer 2025 transfer window?

Southampton total spend summer 2025: £40.8m

Southampton total income summer 2025: £108.5m

Southampton total net profit summer 2025: +£67.7m

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Latest Southampton transfer rumours

You can find a complete list of the latest Southampton transfer rumours by clicking here.

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Southampton squad

You can view Southampton's current squad ahead of the 2025-26 season by clicking here.

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