Arsenal's first league title in 22 years. West Ham's relegation. Sunderland, freshly promoted, somehow finding their way into European football. The 2025/26 Premier League season produced the kind of storylines that get turned into documentaries. But beneath all that noise, a quieter, arguably more revealing story was playing out in the transfer market — and the players who gained the most value this season aren't necessarily the ones whose names were on every back page.
According to data published by Transfermarkt, the list of players who grew their market valuations most dramatically over the course of the campaign contains some genuinely surprising entries. And if you know how to read them properly, they tell you far more about the state of English football than any league table.
Igor Thiago: The Injury-Defying Miracle at Brentford
Perhaps the most striking entry on the list is Brentford's Igor Thiago, who climbed to third place among the Premier League's biggest value gainers — despite significant injury disruption throughout the season. Let that sink in for a moment. A player who spent a meaningful portion of the campaign on the treatment table still managed to generate enough impact on the pitch to become one of the most valuable assets in the division.
That is not a coincidence. That is Brentford doing what Brentford do. The west London club have built an entire identity around identifying undervalued talent, optimising it, and watching the market catch up. Igor Thiago's valuation rise — achieved in spite of injury, not because of an uninterrupted run of form — speaks to the sheer quality of what Brentford's recruitment and development structure has unlocked in him. For any club eyeing him this summer, that number on the Transfermarkt page is arguably still conservative.
Morgan Rogers and the Aston Villa Blueprint
Coming in at eighth on the list, Morgan Rogers' presence is confirmation of something that can no longer be dismissed as a fluke. Aston Villa are not just a well-funded club riding a wave — they are a genuine talent development machine. Rogers' value surge adds another data point to a growing body of evidence that Villa Park is one of the best environments in European football for a young player to realise their potential.
The broader implication here matters enormously. When clubs like Manchester City or Liverpool accelerate a player's development, it is largely expected — the infrastructure, the coaching depth, the competition for places all points in that direction. When Villa do it, repeatedly, it signals a structural shift in where ambition and smart process can take a football club. Rogers is the latest name in what is becoming a very long list.
The Arsenal Distortion Problem
There is, however, a significant caveat to how we interpret any valuation data from this particular season — and it centres on Arsenal. Winning the Premier League title for the first time in over two decades does extraordinary things to a squad's perceived worth. Several Gunners players will almost certainly appear on this list, and it would be lazy analysis to treat those numbers at face value.
Title-winning campaigns inflate valuations. The exposure, the scrutiny, the highlights reels — they all push market perceptions upward in ways that don't always survive contact with a more competitive or less harmonious environment. That is not to diminish what Arsenal achieved, but for any club doing their due diligence this summer, separating genuine long-term value from the glow of a championship medal is an essential piece of work.
The Cruel Gap Between Value and Reality
Perhaps the most emotionally resonant dimension of this data is what it reveals about the clubs at the extremes. Sunderland — a club that has rebuilt from the third tier with remarkable speed — are now in European football. Some of their players may well feature in value conversations that, a few years ago, would have seemed unthinkable from Wearside. Yet the gap between market value and the resources needed to truly compete at the top remains enormous.
West Ham's story cuts even deeper. A club whose squad contains real Premier League-quality talent — players whose valuations reflect that — facing the Championship next season. Market value and league position told brutally different stories in 2025/26. For supporters on both ends of that spectrum, this list is a reminder that football's economy is always running on a parallel track to the one that actually determines your fate.
The numbers are fascinating. But it's what they refuse to tell you that matters most.
Source information via Transfermarkt News. Original reporting by Dribblestack editorial team.
