Window closes at midnight in Scotland
BBC Sport Scotland lists deals involving Scottish clubs
Croatian Jozo Simunovic signs five-year contract with Celtic
Celtic defender Virgil van Dijk joins Southampton for £11.5m
Partick Thistle sign Dundee United striker Robbie Muirhead on loan
Image source, SNSJack Hendry puts his head where it hurts against Aberdeen striker David Goodwillie
Partick Thistle central defender Jack Hendry has moved to Wigan Athletic on a four-year deal for an undisclosed fee.
He caught Wigan's eye in a pre-season friendly between the clubs. Hendry, 20, who was in the final year of his contract, has made four appearances for the Firhill side, having graduated from the youth ranks.
Dundee have signed Cardiff City's 20-year-old striker Rhys Healey on loan until January.
The Englishman was loaned to Colchester for part of last season.
Meanwhile, midfielder Simon Ferry has left Dens by mutual consent after making 23 appearances.
The 27-year-old has not played in the first team since the 4-0 win over Kilmarnock on the opening day of the season.
Dundee United have signed Australian international striker Adam Taggart and English midfielder Aaron Kuhl on loan until January.
Taggart, 22, joins from Fulham while 19-year-old Kuhl has signed from Reading.
Celtic have signed Inverness CT midfielder Ryan Christie on a four-year deal.
The 20-year-old is being loaned back to the Highland outfit for a season but Celtic have the option of recalling him in January.
Image source, SNSMidfielder Ryan Christie has signed a four-year deal with Celtic
"Ryan is a hugely talented young player and it is great news that we have secured his long-term future with Celtic," said manager Ronny Deila.
Hibernian have signed Chelsea striker Islam Feruz on loan, subject to international clearance.
Image source, SNS Group Bill MurrayThe Scotland Under-21 cap, 19, has joined Alan Stubbs' Hibs for the rest of the season.
Inverness CT confirm loan signings Miles Storey (Swindon) and Tobi Sho-Silva (Charlton) on loans, subject to clearance.
Southampton have completed a £11.5m move for Dutch defender Virgil van Dijk from Celtic.
The 24-year-old has agreed a five-year contract with the Premier League club after passing a medical.
Image source, SNSVan Dijk has sealed an £11.5m move to English Premier League outfit Southampton
Rangers duo Andy Murdoch and Robbie Crawford have been sent out on loan until January.
Image source, SNSMurdoch will be at Central Park until January 2016
Murdoch has joined Cowdenbeath in Scottish League One while fellow midfielder Crawford has moved to Alloa Athletic, one of Rangers' Scottish Championship rivals.
Partick Thistle have signed striker Robbie Muirhead on loan from Dundee United.
The 19-year-old, capped up to Scotland Under-19 level, will move to Firhill until 4 January.
Image source, SNSRobbie Muirhead has joined United's Premiership rivals Partick Thistle
"All at Thistle welcome Robbie and wish him all the best during his loan spell at Firhill," said Partick Thistle on their website.
In all, Muirhead has made 60 senior appearances in Scottish football, including 25 starts, scoring six goals.
You can follow UK-wide live text coverage of transfer deadline day here.
Good morning and welcome to our coverage of transfer deadline day in Scotland.
We're going to provide a list of all the deals involving Scottish clubs from now until midnight.
The window closes in England at 18:00 BST but players can join Scottish clubs after that time.