Diebold has offered for every Wincor Nixdorf share 38.98 euros in cash and 0.434 of a common Diebold share.
Both companies said on October 17 they had entered exclusive talks. Based on Diebold's share price before that announcement, the offer represents an implied value of 52.50 euros per Wincor share, a premium of about 35 percent.
Including debt, the offer values Wincor Nixdorf at 1.7 billion euros, or $1.8 billion.
Wincor Nixdorf shares were indicated to open 11.3 percent higher, according to pre-market data at broker Lang & Schwarz.