Brenden Aaronson, a 21-year-old American midfielder, and Rasmus Kristensen, a 24-year-old Danish full-back, have both arrived at Elland Road, bringing Champions League and international experience with them - and the deals were over the line before the market had even opened.
Last season the Whites' thin squad, devastated by injury, played a huge role in Leeds' close brush with Premier League relegation and by getting business done early doors, the Leeds board look keen to avoid a repeat crisis.
So much depends on how the two big question marks over Raphinha and Kalvin Phillips are resolved, as the sale of either or both of United's star players will drastically change the budget that the West Yorkshire side have to play with this transfer window.
The window opened on Friday June 10 but already, Leeds have been linked with countless players who may or may not be interested in joining the Elland Road outfit.
The bookmakers have had their say on the likelihood of various footballers coming to LS11 - here are 16 players who they think could be wearing a United shirt next season, ranked from least likely to most likely:
1. Jesse Lingard - 40/1
Former loan club West Ham United are currently the favourites at 6/5 to secure the England international. Photo: Dan Mullan
2. Aaron Wan-Bissaka - 33/1
The bookies are tipping the Londoner to return to his boyhood club Crystal Palace this summer, with odds for a homecoming set at 3/1. Photo: Shaun Botterill
3. Alex Oxlade-Chamberlain - 25/1
The 28-year-old is reportedly keen to depart Liverpool having been reduced to a fringe player at Anfield. Photo: Naomi Baker
4. Sam Johnstone - 25/1
Leeds United are keen to bring in a reliable shot-stopper to provide back-up and competition for the Whites' no.1, Illan Meslier. Photo: Tony Marshall
5. Danny Ings - 25/1
After Patrick Bamford's extended absence wreaked havoc with the Whites' season, Leeds are looking to bring in a back-up goal-scorer - Ings bagged 7 in 30 games this term. Photo: Marc Atkins
6. Harry Winks - 25/1
Having fallen behind new signing Roman Bencatur in the Spurs pecking order, Winks is being pursued by Everton boss Frank Lampard and the Toffees are favourite to capture him at 3/1. Photo: Peter Norton