However, its debt totalled $100 billion at the end of March and investors are concerned the takeover of the FTSE 100 designer will see the debt pile grow further, heaping more pressure on its balance sheet.
Addressing analysts worried about the firm’s finances, Son said: “Yoda said in Star Wars, listen to the Force.”
Sprint shares have risen more than 30% this year on hopes cash from the stake sales would be spent on turning around the mobiles firm.
Naoshi Nema, an analyst at investment bank Cantor Fitzgerald, said: “We are afraid the stock market will react negatively until investors see a profit growth to justify the high premium.”
Elsewhere, there was talk that a potential bidding war could emerge, with ARM customer Apple named as a possible buyer.
“SoftBank’s bet on ARM… might be one that one of the US tech giants may be prepared to eclipse,” said ETX Capital’s Neil Wilson.
