Kerys Lynch was last seen leaving her house in Kilwinning in North Ayrshire at around 12.30pm on Monday.
Chloe Brand, from Carron in Falkirk, was last seen at around 3.30pm on Friday.
Amie Choat, 13, was last seen in the Staunton Rise area of Livingston at around 8.30am on Tuesday.
Abbey Rogan was last seen leaving an address in Kirkcaldy at around 9.45pm on Tuesday.
