It closed at $66 a share in consolidated trading, up $1.625.
Oil closed Thursday at $62.66 a barrel in regular trading.
The offer is thought to be more than $200 a share; the company's stock closed at $210.75 in heavy trading.
After three mood changes, the stock market closed higher yesterday in active trading.
It had closed down 50 cents, to $34.87, in regular trading.
The stock closed in composite trading at $37.125, up 25 cents.
Yesterday, they closed at $2.35 a share in electronic trading.
The company's shares fell $8.50, to close at $31, in heavy trading.
Shares of Microsoft closed up $2 today, to $88.9375, in heavy trading.
The stock closed at $55, up $8.75, in heavy trading.