Off-price retail chain group The TJX Companies Inc has posted a 19 per cent jump in first quarter net profit compared to the year-ago period on the back of strong sales growth. The Massachusetts-based operator of TJ Maxx, Marshalls and other off-price outlets, said net income for the period was $147.1 million, or 27 cents a share, compared with $123.7m, or 22 cents a share, a year earlier.