Johnson & Johnson Pay $1 Billion For 18% Stake In Elan By: MarketMinute.com Stock News Shares of Ireland-based Elan Corp. (NYSE: ELN) surged 95 cents to $7.95 after Johnson & Johnson (NYSE: JNJ) paid $1 billion to take an 18% stake in the drug research firm. Johnson & Johnson stock lost 92 cents to $56.15. Related Stocks: Johnson & Johnson