CALIFORNIA ? A secretary and six laboratory workers at Kaiser Permanente held the winning ticket for the $315 million Mega Millions jackpot – but they still came into work, a company spokeswoman said.

The jackpot was the second-richest prize won with a single ticket in the history of lotteries in the United States.

The winners, who had chipped in $3 apiece and bought 21 tickets, came into work Wednesday at the medical center in Garden Grove anyway, said Kaiser spokeswoman Barbara Shipnuck.

“They bought the entire staff lunch to celebrate,” Shipnuck said. “For now, they all prefer to stay anonymous.”

The ticket was bought at Rainbow Water, Juice, Flower & Gift, not far from Disneyland, where the owners will receive $1 million.