Background: Triple-negative breast cancer (TNBC) is a subtype of breast cancer (BC) with unique clinical-pathological & prognostic characteristics. Studies have shown obesity to be risk factor for TNBC. Furthermore, patients (pts) with BC and overweight/obesity have a worse prognosis. Here we investigate body mass index (BMI) & weight trends among BC survivors. Methods: A retrospective review BC pts at Cancer Treatment Centers of America Atlanta from 2012-10/27/17. Definition of a survivor: pts who have completed definitive therapy with no evidence of disease. Survivor BMI & weight gain (kg) calculated from chart review. Weight gain in kg was recorded post chemotherapy, at 3, 6, 9, 12 month follow up. Inclusion: Pts with ER-PR-HER2- (TNBC), adults > 18 yo, pts who completed chemo (neoadjuvant or adjuvant) & surgery +/- radiation. Exclusion: Pts who died, had relapsed local disease or metastatic disease; missing BMI data; currently on chemotherapy; who did not receive chemotherapy; missing continuous BMI data or pathology report; lost to follow up. Results: 1756 BC pts with stage IA-IIIC identified, 300 pts identified as TNBC. A total of 134 patients met full inclusion/exclusion survivorship criteria. Average age of survivors = 52 (range 25-76). Stage: I = 38%; II = 50%, III = 12%. BMI categories: 0% underweight (BMI < 18.5 kg/m2), 15% normal weight (BMI 18.5 to < 25 kg/m2), 18% overweight (BMI 25 to < 30 kg/m2), 55% obese (BMI ≤30 kg/m2), 12% morbid obesity (BMI ≤ 40 kg/m2). Average BMI for all survivors = 32.23 +/-0.59 kg/m2 (range 19-52 kg/m2); post chemotherapy weight change = 0.53 +/-0.41 kg; at 3 month follow up = -0.16 +/-0.51 kg; at 6 month = -0.02 +/-0.54 kg; at 9 month follow up 1.20 +/-0.59 kg; at 12 month follow up = 2.25 +/-0.61 kg. BMI by stage: I = 32.81 +/- 1.00 kg/m2; II = 32.12 +/- 0.91 kg/m2; III = 32.44 +/- 1.27 kg/m2. Conclusions: In our study, female survivors with TNBC present with obesity and gain weight after chemotherapy. Also, weight gain continues at 9 & 12 months post definitive treatment. Survivors with TNBC should be treated with intensive weight loss interventions given that overweight/obesity is a risk factor for recurrence, worse prognosis, & cardiovascular events.