Idexx Laboratories Inc. of Westbrook closed a banner day on Tuesday, first reporting that its second-quarter revenue of $467 million was up 13 percent from the same quarter in 2015, and then seeing its stock price reach an all-time high when markets closed.

Trading of the veterinary diagnostic-test maker’s stock reached a record $105.88 per share when the Nasdaq closed Tuesday. Idexx’s stock received a similar bump after its first-quarter earnings report in April prompted a record $84.35 per share stock price.

The company attributed the revenue increase to strong growth in its companion animal group and water quality test kit segment.

Idexx reported earnings per diluted share of 74 cents, an increase of 23 percent from a year earlier, while absorbing a negative impact of 6 cents per share related to net changes in foreign currency exchange. The federal research and development tax credit, which benefited the current but not the prior year period, had a 2 percent favorable impact on earnings-per-share growth, it said.

“We accelerated growth in the second quarter, further demonstrating the benefits of bringing our innovations to an attractive global market with an expanded commercial presence, including our move to a fully direct sales strategy in the U.S. companion-animal market in 2015,” said Jonathan Ayers, company chairman and CEO, in a news release. “Our teams accomplished strong revenue gains across U.S. and all international regions, with flow-through benefits that drove very strong profit results.”

Idexx results for the second quarter beat analyst expectations by a considerable margin, according to the investor service Seeking Alpha. Its earnings per share beat expectations by 12 cents, and revenue was $21.7 million above analyst projections.

Idexx trades on the Nasdaq exchange under the symbol IDXX. Its stock price increased 13.2 percent in trading on Tuesday.

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