According to Transfermarkt, 11,148 transfers were officially made between January 1 and February 1, with the transfer fees totalling a little over $600 million.
While significantly less than the 18,488 transfers worth $1.6 billion that occurred last January, it's still a lot to take in.
But we've made it easy for you.
Here's The18's five-minute guide to the most important transfers of this year's winter window:
Winter Transfers 2021
Five Most Expensive
1. Sébastien Haller (West Ham → Ajax)
Fee: $24.75 million
One of the first transfers of the window, Haller left West Ham for less than half of his original fee but already has two goals and four assists in the Eredivisie.
2. Amad Diallo (Atalanta → Manchester United)
Fee: $23.1 Million
Despite only making five senior appearances for Atalanta, Manchester United deemed him talented enough to pay $23 million for the 18-year-old winger.
3. Dominik Szoboszlai (Red Bull Salzburg → RB Leipzig)
Fee: $22 million
The Red Bull pipeline between Austria and Germany continues, as Hungarian winger Dominik Szoboszlai is the latest prospect to make the switch. He posted nine goals and 14 assists as a 19-year-old in Austria last year.
4. Krépin Diatta (Club Brugge → Monaco)
Fee: $22 million
An insanely pacey right winger, Diatta's nine goals in Belgium's Jupiler Pro League this season cemented him as one of the hottest prospects in Europe.
That one has stayed hit.
— FotMob (@FotMob) June 24, 2019
5. Nicolò Rovella (Genoa → Juventus)
Fee: $19.8 million
The masters of the buy-and-loan-back scheme, Juventus completed three such transfers over the winter window, with Rovella, a 19-year-old holding midfielder, being the most expensive purchase.
Top Five Bargains
1. Joakim Mæhle (KRC Gent → Atalanta)
Fee: $12.10 million
After selling Timothy Castagne to Leicester, Atalanta was left with a hole at the fullback position. With Mæhle, the Italian side gained a talented Danish right back and made a $14 million profit.
2. Kenny Lala (Strasbourg → Olympiacos)
Fee: $2.75 million
Lala was one of Strasbourg's most dependable defenders for the past four seasons, but with his contract set to expire this season, Oympiacos was able to buy a player worth $9.9 million at a 70 percent discount.
3. Viktor Kovalenko (Shakhtar Donetsk → Atalanta)
Atalanta hit the bargain bin again, this time snatching up Ukranian midfielder Viktor Kovalenko for $5.9 million below his market value.
4. Papu Gómez (Atalanta → Sevilla)
Fee: $6.05 million
Gómez may be 32, but he is aging like a fine wine. His three best seasons have all come after he turned 28, which is why the Argentinian is still worth $16 million.
5. Demarai Gray (Leicester City → Bayer Leverkusen)
Fee $2.20 million
Still just 24, Gray was sometimes an impact player off the bench for Leicester, but he never quite found his form in the Premier League. Leverkusen will hope that their low-risk purchase of the former Birmingham man will pay off.
Five For The Future
1. Kwadwo Baah (Rochdale → Manchester City)
Barely two weeks after we highlighted Baah's brilliant brace against Charlton, the teenage winger secured a move to Manchester City, effective at the end of the season.
2. Brenden Aaronson (Philadelphia Union → RB Salzburg)
The American midfielder scored in his international debut against El Salvador back in December, and now the New Jersey native will be trading MLS for the Austrian Bundesliga.
3. Filip Stevanović (Partizan Belgrad → Manchester City)
Manchester City is clearly looking to corner the market on young left wingers, this time bringing in Stevanović from Serbia for a hair under $10 million and loaning him back out until the end of the campaign.
4. Kouadio Koné (Toulouse → Borussia Mönchengladbach)
Mönchengladbach will hope that Koné, a promising defensive midfielder from France, can be the club's latest unsung transfer to make an impact in the Bundesliga.
5. Mark McKenzie (Philadelphia Union → KRC Gent)
Gent used some of its Mæhle money to purchase another Philadelphia Union prospect — American center back Mark McKenzie.
Top Five Deadline Day Moves
1. Paulinho (Braga → Sporting Lisbon)
Currently leading the league by four points, Sporting Lisbon will hope that the Primiera Liga's second-leading scorer from last season will help the club win its first Portuguese title since 2001-02.
2. Moisés Caicedo (Independiente → Brighton & Hove Albion)
Recently linked to Manchester United, Brighton plucked Caicedo for $5.5 million from his native Ecuador, where the 19-year-old already has four international caps.
Score in a @FIFAWorldCup Qualifier
Score 2 *golazos* in the #Libertadores
— CONMEBOL Libertadores (@TheLibertadores) February 1, 2021
3. Ozan Kabak (Schalke 04 → Liverpool)
Liverpool's signing of Ben Davies earlier in the day overshadowed the Reds' bigger move, a loan-to-buy transfer of Schalke's Ozan Kabak, a Turkish center back with significant promise that will likely get playing time right away.
4. Takumi Minamino (Liverpool → Southampton)
Southampton will hope that its last-minute deadline-day loan helps an attack that has often struggled to create chances in the Premier League.
5. Adam Ounas (Napoli → Crotone)
Last-place Crotone boasts the worst defense in Serie A, which is why it brought Napoli winger Adam Ounas in on loan. Hey, sometimes you have to fight fire with fire.
Five Impact Loans
1. Willian José (Real Sociedad → Wolves)
Wolves' goal totals have suffered since the loss of Raúl Jiménez to head injury. José has four straight double-digit goal totals in LaLiga. Seems like a perfect fit.
2. Luka Jović (Real Madrid → Eintracht Frankfurt)
Frankfurt striker André Silva has seven goals in his last five games, bringing his total to 16 for the season. Jović already has three goals in four Bundesliga games. With these two firing on all cylinders, Frankfurt is scary good.
3. Martin Ødegaard (Real Madrid → Arsenal)
Ødegaard has impressed consistently despite being loaned out at different clubs each of the past three seasons. The EPL is his hardest challenge yet; is he up to it?
4. Moussa Dembélé (Lyon → Atletico Madrid)
Luis Suárez and João Félix have been fantastic up top for the leaders of LaLiga, but the athletic presence of Moussa Dembélé offers them something a little bit different.
5. Ainsley Maitland-Niles (Arsenal → West Bromwich Albion)
Maitland-Niles joins a West Brom side that is in desperate need of quality on the pitch. Can a solid holding midfielder help fix the woes of the league's worst defense?