Sumitomo Mitsui Finance and Leasing has sufficient capital to absorb the financial impact of its planned purchase of helicopter lessor Macquarie Rotorcraft, S&P Global Ratings said in a Wednesday release.

The acquisition will allow the Japan-based leasing company to diversify its portfolio and widen its revenue sources, S&P said.

The transaction, which could potentially exceed $1 billion, aligns with the company's goal to zero in on the transportation sector, with its helicopter leasing segment growing and gaining competitive advantage, the rating agency said.

S&P expects the company's risk-adjusted capital ratio to remain within its current capital assessment despite the deal's impact.

However, potential risks such as weaker growth in the acquired business and related impairment still linger, S&P said.