Work is already underway to improve Celtic's squad in the upcoming summer transfer window as they go in search of a fifth successive Scottish Premiership title next term.
The Hoops secured their fourth league title in as many seasons with a 5-0 win over Dundee United at the end of last month, whilst they also have a chance to complete a domestic treble with an SFA Cup final clash with Aberdeen.
Brendan Rodgers has already sealed one new signing for the summer in the form of Kieran Tierney, who will officially return to Celtic when his contract at Arsenal expires at the end of June.
Kieran Tierney's current market value
At the time of writing (11/05/2025), the Scotland international is valued at a whopping £8.5m by Transfermarkt, which suggests that the Hoops have landed a bargain by signing him on a free transfer.
kieran-tierney-celtic-career-stats-record (timeless)
As you can see in the graphic above, Tierney was sold for a staggering £25m after his terrific first spell at Parkhead after coming through the academy, as he joined Arsenal in the summer of 2019.
This shows that the Scottish giants have played a blinder with the experienced left-back because they sold him for a huge transfer fee and are now signing him back for nothing, whilst he is still valuable, albeit not as valuable as he once was.
Market Movers
Market Movers
Football FanCast's Market Movers series explores the changing landscape of the modern transfer market. How much is your club's star player or biggest flop worth today?
Celtic, though, have developed their own full-back who is now worth just as much as Tierney, after they signed him for a fee of just £3.5m back in 2023, in the form of Alistair Johnston.
Alistair Johnston's soaring market value
The Hoops swooped to sign the defender from CF Montreal for a fee of £3.5m in the January transfer window at the start of 2023 to bolster Ange Postecoglou's options at right-back.
Johnston-celtic-premiership
Johnston has been a regular starter at right-back when fit and available for Celtic since his move, and has proven himself to be an excellent performer at Premiership level by combining solid defensive work with outstanding attacking contributions.
The Canada international has the strength and positioning to win the majority of his physical duels to stop opposition wingers, whilst also having the drive and stamina to constantly bomb down the flank to deliver high-quality balls into the box.
Alistair Johnston (Premiership) 23/24 24/25
Appearances 32 30
Goals 1 4
Big chances created 11 15
Assists 5 9
Duel success rate 58% 56%
Clean sheets 11 12
Stats via Sofascore
As you can see in the table above, Johnston has been a star for the Hoops in his two full Premiership seasons in Glasgow, creating 26 'big chances' in 62 matches.
This has helped his market value to soar way above the £3.5m that the club initially paid for his services at the start of 2023. At the time of writing, the Celtic sensation is valued at £8.5m by Transfermarkt, which means that his value has soared by £5m in a little over two years at Parkhead.
Johnston, whose work ethic was dubbed "phenomenal" by Rodgers, is now worth as much as Tierney, who was once sold for £25m, and is a highly-valuable asset for the club, thanks to the brilliant performances that he has put in on the pitch.
Jota-Celtic Related
Celtic could sign a perfect £7m Jota replacement this summer
Celtic may be in the market for a new winger after they lost Jota to a long-term injury.
Therefore, Celtic have hit the jackpot with the Canadian defender because he is an excellent player and a star who could be sold for a profit in the future, given that his value has soared during his time in Scotland so far.