Graphic Packaging Holding Company reported net income for first quarter 2018 of $29.9 million, or $0.10 per share, based upon 311.3 million weighted average diluted shares. This compares to first quarter 2017 net income of $37.0 million, or $0.12 per share, based on 314.1 million weighted average diluted shares.   Net sales increased 39% to $1,476.0 million in the first quarter of 2018, compared to $1,061.5 million in the prior year period. The $414.5 million increase was driven by $359.5 mill...