BACKGROUND Proximal humerus fractures remain challenging to the treating orthopaedist in both their initial diagnosis and classification and in their corresponding management. They account for approximately 5% of all fractures, 1,2 and their incidence is expected to increase secondary to an ageing population and the associated osteoporosis.(3,4,5,6) These fractures are the third most common type of fragility fractures after distal radius and hip fractures in patients aged 65 years and above. MATERIALS AND METHODS In our study, 42 patients were treated and followed for a period of 2 years from July 2014 to July 2016 in Department of Orthopaedics, Siddhartha Medical College, Vijayawada, Andhra Pradesh. In our study, 42 patients were treated with PHILOS locking plate and their intra and postoperative period followup done for 2 years; outcome of patients, complications studied throughout this period. RESULTS In our study, 42 cases treated with locking plates, age incidence most common in 41-50 years age group, more common in males (34 cases), more common on right side (31 cases). In our study, maximum number of cases belong to Neer's 2-part surgical neck of humerus fractures (24 out of 42 cases) followed by fracture dislocations (9 out of 42 cases) and three-part fractures (8 out of 42 cases). Mean followup of our study was 18.9 months ranging from 9 months to 24 months. Average time for union was 12.5 weeks in our study ranging from 12 weeks to 14 weeks. Out of 42 cases we have operated 28 cases within 7 days of injury and 8 cases within 7-14 days and remaining 6 cases after 14 days due to delay in presentation to us. Adequate reduction is achieved in 32 cases out of 42 cases. Mean Neck shaft angle calculated on immediate postoperative radiographs was 136.3 degrees and mean angle after fracture healing was 131.6 degrees. There was a mean 4.7 degrees varus collapse (mean fall of Neck shaft angle) from initial fixation to fracture healing in our study. Range of motion was affected by increasing age in our study, best range of motion was found in age group of 20-30 years with a mean of 136 degrees forward flexion, 133 degrees abduction, 85 degrees of external rotation and 86 degrees of internal rotation. Range of motion reduced with advancing age in our study can be explained by the age related rotator cuff dysfunction. Results were evaluated based on the Constant Murley Score and DASH shoulder scoring systems. In 86% of cases, there was excellent to good results & fair results in 12% cases. There were two percent poor results in our study. CONCLUSION In our study, we conclude that locking plates minimise the possible complications like screw loosening, screw back-out and varus collapse associated with traditional plates. Significant improvement in functional outcome is seen with locking plates due to early mobilisation of shoulder. Functional outcome is directly proportional to the reconstruction and functioning of rotator cuff and proper rehabilitation.