Duluth Holdings Inc (NASDAQ:DLTH) reported that net income improved by $5.2 million and adjusted EBITDA rose by $6.4 million over the prior-year period, pointing to year-over-year gains in profitability. The workwear and apparel retailer said net income increased by $5.2 million and adjusted EBITDA, a measure of operating earnings, climbed $6.4 million against the comparable prior-year period.