Overall, Tory rebels were 115, then 75, then 34. About 28 of the 34 were ERG.
Those who voted against the deal (3rd vote):
Adam Afriyie (Conservative), Windsor - No
Steve Baker (Conservative), Wycombe - No
John Baron (Conservative), Basildon and Billericay - No
Guto Bebb (Conservative), Aberconwy - No
Peter Bone (Conservative), Wellingborough - No
Suella Braverman (Conservative), Fareham - No
Andrew Bridgen (Conservative), North West Leicestershire - No
William Cash (Conservative), Stone - No
Christopher Chope (Conservative), Christchurch - No
James Duddridge (Conservative), Rochford and Southend East - No
Mark Francois (Conservative), Rayleigh and Wickford - No
Marcus Fysh (Conservative), Yeovil - No
Justine Greening (Conservative), Putney - No
Dominic Grieve (Conservative), Beaconsfield - No
Sam Gyimah (Conservative), East Surrey - No
Philip Hollobone (Conservative), Kettering - No
Adam Holloway (Conservative), Gravesham - No
Ranil Jayawardena (Conservative), North East Hampshire - No
Bernard Jenkin (Conservative), Harwich and North Essex - No
Andrea Jenkyns (Conservative), Morley and Outwood - No
Joseph Johnson (Conservative), Orpington - No
David Jones (Conservative), Clwyd West - No
Phillip Lee (Conservative), Bracknell - No
Julian Lewis (Conservative), New Forest East - No
Julia Lopez (Conservative), Hornchurch and Upminster - No
Craig Mackinlay (Conservative), South Thanet - No
Anne Marie Morris (Conservative), Newton Abbot - No
Priti Patel (Conservative), Witham - No
Owen Paterson (Conservative), North Shropshire - No
John Redwood (Conservative), Wokingham - No
Laurence Robertson (Conservative), Tewkesbury - No
Andrew Rosindell (Conservative), Romford - No
Lee Rowley (Conservative), North East Derbyshire - No
Theresa Villiers (Conservative), Chipping Barnet - No
Not sure who is or isn't ERG there. If it's 28 then just one short of the ERG being able to swing it by my calculations.