Waters Corp (WAT) SEC Filing 10-K Annual report for the fiscal year ending Monday, December 31, 2012

Exhibit 99.1

For Immediate Release

Contact: Gene Cassis, Vice President of Investor Relations, 508-482-2349

Waters Reports Fourth Quarter 2012 Financial Results

Milford, Massachusetts, January 22, 2013—Waters Corporation (NYSE/WAT) reported fourth quarter 2012 sales of $522 million, slightly ahead of $521 million in the fourth quarter of 2011. In the quarter, constant currency sales growth was approximately 1.5%. On a GAAP basis, earnings per diluted share (E.P.S.) for the fourth quarter were $2.00 compared to $1.51 for the fourth quarter of 2011. On a non-GAAP basis, including the adjustments in the attached reconciliation, E.P.S. grew 2% to $1.59 from $1.56 in the fourth quarter of 2011.

For the full year, sales for the Company were $1.84 billion, compared to sales of $1.85 billion in 2011, with foreign currency translation reducing sales growth by about 2%. E.P.S. for 2012 were $5.19 compared to $4.69 in 2011. On a non-GAAP basis, including adjustments in the attached reconciliation, E.P.S. grew 2% to $4.93 from $4.81 in 2011.

Commenting on the Company’s 2012 performance, Douglas Berthiaume, Chairman, President and Chief Executive Officer said, “Demand trends in the fourth quarter were generally consistent with those observed throughout 2012. Our recurring revenues and business in Asia contributed to overall constant currency growth during a challenging period for the Company. For the full year, the combination of a stable pricing environment and prudent cost control allowed us to maintain our operating income level and grow our E.P.S. principally by reducing our share count through share repurchases.”

As communicated in a prior press release, Waters Corporation will webcast its fourth quarter 2012 financial results conference call this morning, January 22, 2013 at 8:30 a.m. eastern time. To listen to the call, connect to www.waters.com, choose “Investor Relations” and click on the “Live Webcast”. A replay will be available through January 29 at midnight eastern time, similarly by webcast and also by phone at 402-220-9829.

CAUTIONARY STATEMENT

This release may contain “forward-looking” statements regarding future results and events. For this purpose, any statements that are not statements of historical fact may be deemed forward-looking statements. Without limiting the foregoing, the words, “believes”, “anticipates”, “plans”, “expects”, “intends”, “suggests”, “appears”, “estimates”, “projects”, and similar expressions, whether in the negative or affirmative, are intended to identify forward-looking statements. The Company’s actual future results