Driven from HBL data

What might indicate if one company has a significantly higher debt-to-equity ratio than the other two on the below data?

Please describe the financing ratio of company A.

Financing Ratios
Company A Market Comparison
Year 2014 2015 2016 Debt to Equity = total liabilities / shareholder's equity Company A Company B Company C
Ratio 0.27 0.19 0.28 0.28 1.3 4.51