That’s according to the iconic boss’ leaked transfer list from 2004, which shows the then-Anderlecht star on the Red Devils’ radar.
Kompany was listed under the column ‘transfer targets/possibilities’ alongside the likes of Gabriel Heinze and Barcelona star Gerard Pique, both of whom Ferguson brought to Old Trafford that summer.
The centre back instead left Anderlecht for SV Hamburger for a reported €10m (£8.8m) in 2006, before joining Manchester City for £7m two years later.
Had Kompany signed for the red half of Manchester in 2004 and starred, both clubs would likely have had very different decades, with United unlikely to have signed Nemanja Vidic in 2006.
Man City would also have lost a captain who would eventually lead them to four Premier League titles, two FA Cup wins and four League Cup victories in an 11-year stint at the Etihad Stadium.
Elsewhere on the list, Alan Smith has an arrow pointing to his name, with Ferguson completing a controversial move for the Leeds forward in the summer of 2004.
Both Nicky Butt and Diego Forlan are also included in the boss’ plans, as both were deemed ‘excess’ to the squad by the Scot.
The duo were both sold that summer, with the Uruguayan signing for Villarreal and the Class of ’92 member swapping Old Trafford for Newcastle United’s St James’ Park.
Burnley and England keeper Tom Heaton also features on the list under the ‘youth potential’ column, alongside current team mate Phil Bardsley, former Sunderland star Kieran Richardson and former Birmingham City stalwart Jonathan Spector.
Kompany meanwhile went onto join City and announced his move to Anderlecht as player-manager.
In an emotional Facebook message, he wrote: “Not so long ago, I took a call from RSC Anderlecht.
“Quite unexpectedly, they offered me the position of Player-Manager.
“Michael and Frank explained to me in detail how they saw it working in practice.
“They had thought it through.
“Mr. Coucke, the owner, pledged full support: time, budget, framework, staff, facilities …
“I was left not only impressed, but also intrigued by this sign of confidence in me.
“It got me thinking.
“The end of this season couldn’t be more memorable.
“I have lived the dream here.
“I have learned so much the last 3 years.
“From an incredible manager.
“Pep Guardiola reignited my love for the game.
“I’ve witnessed, participated, analyzed, absorbed, studied.
“Man City play the football I want to play.
“It is the football I want to teach and to see played.
“I have decided to take up the challenge at RSC Anderlecht.
“I want to share my knowledge with the next purple generations.
“With that, I will also put a bit of Manchester in the heart of Belgium.
“This is no goodbye. It’s a see you later.”