Paper products maker P.H. Glatfelter Co. today reported first-quarter net income of $18.9 million, or 43 cents per diluted share, compared with net income of $17.4 million, or 38 cents per diluted share, in the year-ago period.

Shares of the company are traded on the New York Stock Exchange under the ticker symbol GLT.

Meanwhile, dental products company Dentsply International Inc. today reported first-quarter net income attributable to the company of $53.3 million, or 37 cents per diluted share, compared with $69.1 million, or 48 cents per diluted share, in the year-ago quarter.

Shares of Dentsply are traded on the Nasdaq under the ticker symbol XRAY.

On Monday, Lancaster County-based flooring, ceiling and cabinetry manufacturer Armstrong World Industries Inc. reported net income of $18.2 million, or 31 cents per diluted share, compared with $13.5 million, or 23 cents per diluted share, in the year-ago period.

Shares of Armstrong are traded on the NYSE under the ticker symbol AWI.