The 19-year-old put pen to paper on a new three-year deal to commit his future to the club, amid speculation linking clubs including Paris St Germain with a move for him.
Like so many other teenagers, van Gaal gave Pereira his senior debut at the club this year and has been impressed with his progression since he took over as United manager.
“I am delighted that Andreas has signed a new contract,” van Gaal told ManUtd.com.
“Andreas has all the attributes to become an integral part of the first team; great natural talent coupled with a good appetite to learn.
“I am pleased with his progression so far this season and look forward to working with him to develop his talent even further.”
It’s a testament to van Gaal’s reputation that so many youngsters have signed new contracts this year.
Anybody who has regularly followed Man United’s U21s over the last couple of years will be well aware of Pereira’s talent. If he can match that some maturity and discipline, two traits van Gaal will teach him in abundance, he’s got everything he needs to become a successful player at United.