Altay Bayindir&aposs 4.3million move from Fenerbahce was finally confirmed, while both Sergio Reguilon and Sofyan Amrabat joined on loan. United also boosted their defensive ranks as Jonny Evans signed a one-year deal.
United had been keen on another midfielder all summer, finally agreeing a deal for Amrabat after thrashing out the terms of a loan fee.
Ten Hag had been working under strict financial constraints and needed to offload some fringe players in order to raise funds. Those who have left brought in decent money, although the Dutchman may have wanted to see a few more leave.
Elsewhere in the Premier League, those competing for the title and top-four spent vast sums of money as they aim to catch Manchester City. The 100million barrier was smashed by Arsenal and Chelsea, while Liverpool, Tottenham and Newcastle United all invested heavily.
Below, MEN Sport have rounded up the major ins and outs of United and their top-four rivals.
Incomings: Mason Mount (60m), Andre Onana (47.2m), Jonny Evans (free), Rasmus Hojlund (72m), Altay Bayindir (4.3m), Sergio Reguilon (loan), Sofyan Amrabat (loan + 10m fee)
Notable outgoings: Anthony Elanga (undisclosed), Dean Henderson (20m), Fred (12.9m), Alex Telles (6m), Matej Kovar (7.8m), Zidane Iqbal (1m), David de Gea (released), Phil Jones, (released).
Total spend: 193.5m.
Verdict: Ten Hag worked hard to plug the major gaps in his squad before the season started, with Mount, Onana and Hojlund all in before the opening game against Wolves – albeit the latter could not play. The trio have endured different starts to their United careers, with Onana undoubtedly the biggest success at this time.
Bayindir and Reguilon both came in on deadline day to bulk up the squad, with the latter as cover for the injured Luke Shaw, while United finally got a deal over the line for Amrabat after months of interest. His arrival was the major one from Friday.
In terms of outgoings, Ten Hag may have wanted to see a couple more go but brought in good money for those who were sold permanently. Harry Maguire was close to joining West Ham but the move fell through, while interest in Scott McTominay faded.
Incomings: David Raya (loan), Kai Havertz (65m), Declan Rice (105m), Jurrien Timber (38m).
Notable outgoings: Folarin Balogun (34.3m), Kieran Tierney (loan), Granit Xhaka (21.4m).
Total spend: 208m.
Incomings: Alexis Mac Allister (35m), Dominik Szoboszlai (60m), Wataru Endo (16.2m).
Notable outgoings: Jordan Henderson (undisclosed), Fabinho (40m), Roberto Firmino (free), Naby Keita (free), James Milner (free), Alex Oxlade-Chamberlain (free),
Total spend: 111.2m.
Incomings: Axel Disasi (38.5m), Nicolas Jackson (30.1m), Christopher Nkunku (52m), Kendry Paez (17.27m), Robert Sanchez (25m), Moises Caicedo (115m), Lesley Ugochukwu (23.5m), Romeo Lavia (58m), Deivid Washington (17.1m), Djordje Petrovic (14m), Cole Palmer (42.5m).
Notable outgoings: Kai Havertz (65m), Mateo Kovacic (30m), Ruben Loftus-Cheek (17.18m), Mason Mount (60m), Christian Pulisic (18.8m), Lewis Hall (loan), Romelu Lukaku (loan), Kalidou Koulibaly (undisclosed), Edouard Mendy (undisclosed), Pierre-Emerick Aubameyang (free), Cesar Azpilicueta (free), N&aposGolo Kante (free), Kepa Arrizabalaga (loan), Hakim Ziyech (loan)
Total spend: 433m.
Incomings: Dejan Kulusevski (25.6m), James Maddison (40m), Guglielmo Vicario (17.2m), Manor Solomon (free), Pedro Porro (39m), Micky van de Ven (43m).
Notable outgoings: Harry Kane (100m), Harry Winks (10m), Djed Spence (loan)
Total spend: 164.8m.
Incomings: Harvey Barnes (39m), Sandro Tonali (55m), Tino Livramento (32m), Lewis Hall (loan).
Notable outgoings: Allan Saint-Maximin (23m), Chris Wood (undisclosed), Ryan Fraser (loan).
Total spend: 126m.
The transfer window will soon close and although United got their hands on three players well in advance of the September 1 deadline, with Rasmus Hojlund joining Mason Mount and Andre Onana at Old Trafford, activity has stalled since Hojlund&aposs announcement.
A goalkeeper, a midfielder and a striker were Erik ten Hag&aposs priorities heading into the summer window, but injuries early on in the season mean United are in need of further reinforcements.
Our team of experts will be on top of all the goings-on at Old Trafford for the remainder of the window and beyond, and you can get the latest updates and inside information to your phone by joining our new free WhatsApp community below.