Premier League clubs spent £175m in the January 2016 transfer window, bringing the total gross spending by Premier League clubs for the 2015/16 season to a new record of over £1bn.
The €1bn figure surpasses the previous season record of £965m, set last season.
The combined spend by those clubs currently in the bottom six was £90m this January, representing more than half of total Premier League spending.
Last year those clubs that found themselves in the bottom six on transfer deadline day had a gross transfer spend of £20m during that window, representing less than 20% of the Premier League total in January 2015.
The amount of business between Premier League clubs fell compared with January 2015, accounting for 26% of gross spending (£45m) this window, compared with £55m in January 2015. The acquisition of new players from Football League clubs totalled (£20m, 11%).
Premier League clubs concluded around £40m of player transfer fees on deadline day, slightly less than was seen on the January deadline day last year.
Newcastle United, Norwich City and Watford have been the biggest gross spenders in this window, accounting for around 40% of the total transfer spending by Premier League clubs.
Clubs in Italy were the second highest gross spenders this January, with total reported transfer spending of around 30% of the Premier League total.
Total transfer spending by top division clubs in both France and Spain was around 15% of that by Premier League clubs.
Meanwhile gross transfer spending by German clubs was around a fifth of that seen at Premier League clubs.