[3] On 13 August, NorthEast United announced the appointment of Niall Clark as their strength and conditioning coach for the upcoming season.

[4] On 14 August, the Highlanders announced the contract extension of goalkeepers Mirshad Michu and Nikhil Deka for the upcoming season.

[5] On 15 August, NorthEast United announced the retention of defenders Gurjinder Kumar, Mashoor Shereef, Joe Zoherliana and Provat Lakra for the upcoming season.

On 23 August, NorthEast United confirmed the signing of Arindam Bhattacharya on its social media and various other platforms for the upcoming season.

[13] On 6 September, NorthEast United announced the signing of Spanish midfielder Jon Gaztañaga from Cultural Leonesa for the upcoming season.

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