There’s a model they follow and Celtic have had some real success in the transfer window this last decade.
While an academy star like Kieran Tierney has been sold for £25m, the Hoops have also implemented a buy low sell high model effectively. That has a few stars in their current ranks forming the centre of summer rumours this transfer window, with big profits likely en route.
Outside that, a player in Glasgow is judged by their trophy haul in most cases and all of these Celtic players of the present and past can count a fair amount of silverware. They all have made a serious impact in Hoops, whether that be on the park, or what they brought into the club when leaving.
Taking a look over the last 10 years, we take our picks for the 13 best moves in no particular order that Celtic have made in that time.
9. Fraser Forster
Came back to Glasgow in 2019 with an element of hype after his previous stints proved memorable. Was only on loan for a campaign cut short by Covid, but all worth it just for that heroic performance in a 1-0 League Cup final win vs Rangers. Almost single-handedly brought the trophy back to Parkhead. | AFP via Getty Images
10. Odsonne Edouard
2017 loan move from PSG was turned permanent the following summer. Perhaps didn't set the world alight when first arriving but everyone could see the potential, and 89 goals in 196 appearances proved it. That was enough to catch the eye of Crystal Palace and a £14m fee was clinched. Had to follow Dembele and arguably exceeded his impact. | Getty Images
11. Jeremie Frimpong
Not much was known about Frimpong when rocking up at Celtic after time in the Man City academy. Within 18 months, he'd made right-back his own with some flashy displays, and prompted Bayer Leverkusen to spend eight figures on him. A hefty sell-on clause could yet see Celtic profit even more from this fantastic signing. Photo: Craig Foy - SNS Group
12. Matt O'Riley
Celtic have turned down two bids for Matt O'Riley from Serie A side Atalanta this summer. Plucked from the EFL and now turning heads across Europe with his classy midfield work. Played a huge part in last season's double and a Treble the season prior. Photo: Craig Foy - SNS Group