[15] On 15 July, AS Monaco signed Benjamin Lecomte on a five-year contract for an undisclosed fee from Montpellier,[16] and sent Jordi Mboula on loan to Cercle Brugge until the end of the season.

[17] On 23 July, Paul Nardi left AS Monaco to sign for Lorient,[18] while Samuel Grandsir moved to Brest on a season-long loan deal.

[21] On 6 August, AS Monaco announced the signing of Ruben Aguilar on a five-year contract from Montpellier,[22] and that Pelé had joined Reading on a season-long loan.

[28] On 14 August, AS Monaco announced the signing of Wissam Ben Yedder to a five-year contract from Sevilla,[29] while Rony Lopes moved in the opposite direction.

[38] On 1 September, AS Monaco announced the season-long loan signing of Jean-Kévin Augustin from RB Leipzig, with an option to make the move permanent in the summer of 2020.

[39] On 2 September, Robert Navarro left AS Monaco to join Real Sociedad on a permanent transfer,[40] and Wilson Isidor moved to Laval on loan for the season.

[47] On 29 January, AS Monaco announced the signing of Radosław Majecki, from Legia Warsaw, Aurélien Tchouaméni from Bordeaux and Youssouf Fofana from Strasbourg all on contracts until June 2024.

[54] On 28 December, Leonardo Jardim left his role as head coach of AS Monaco, with Robert Moreno being announced as his replacement on a contract until June 2022 the same day.

[1][2] On 25 June, Everton announced that they had agreed a deal with AS Monaco to extend the loan of Djibril Sidibé until the end of their season.

[59] On 1 July, AS Monaco confirmed that the loan deals for Pelé, Jordi Mboula and Antonio Barreca had all been extended until the end of their respective seasons.

[60] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.