Discussion of Non-GAAP Financial Measures

The Company has provided in this release non-GAAP financial information including non-GAAP gross profit, operating income, net income, and net income per diluted share, as a supplement to the condensed consolidated financial statements, which are prepared in accordance with generally accepted accounting principles (“GAAP”). Management uses these non-GAAP financial measures internally in analyzing the Company’s financial results to assess operational performance. The Company believes that both management and investors benefit from referring to these non-GAAP financial measures in assessing its performance and when planning, forecasting and analyzing future periods. Further, the Company believes these non-GAAP financial measures are useful to investors because they allow for greater transparency with respect to key financial metrics that the Company uses in making operating decisions and because the Company believes that investors and analysts use them to help assess the health of its business and for comparison to other companies. Non-GAAP results are presented for supplemental informational purposes only for understanding the Company’s operating results. The non-GAAP information should not be considered a substitute for financial information presented in accordance with GAAP, and may be different from non-GAAP measures used by other companies.

The financial statements provided with this release include a reconciliation of the non-GAAP financial measures to those measures reported in accordance with GAAP.

The Company’s non-GAAP financial measures, used in this press release, reflect adjustments based on the following items:

Share-based compensation expense. These expenses relate to employee restricted stock units and employee stock options. The Company excludes stock-based compensation expense from its non-GAAP measures primarily because such expenses are non-cash expenses that the Company does not believe are reflective of ongoing operating results.

Amortization of intangibles. The Company incurs expenses for the amortization of intangible assets acquired in acquisitions. The Company excludes these items because these expenses are not reflective of ongoing operating results in the period incurred. These amounts arise from the Company’s prior acquisitions and have no direct correlation to the operation of the Company’s core business.

Patent litigation fees and income. The Company, from time to time, may incur charges or benefits that are outside of the ordinary course of the Company’s business related to litigation. The Company believes it is useful to exclude such charges or benefits because it does not consider such amounts to be part of the ongoing operation of the Company’s business and because of the singular nature of the claims underlying the matter.

Net tax provision (benefit) adjustments. This line item represents the income tax effects of the non-GAAP items.

Tax reform. The Tax Cuts and Jobs Act impacted the Company’s 2017 results primarily due to (i) a one-time non-cash tax expense estimated at $8 million, reflecting the revaluation of its net deferred tax asset using a U.S. federal tax rate of 21%, (ii) a one-time transition tax estimated at $1.5 million on its unremitted foreign earnings and profits, which are offset by utilized foreign tax credits estimated at $1.6 million and (iii) a valuation allowance associated with any remaining foreign tax credits of $1.5 million, which may not be utilized in future periods. The Company will continue to evaluate the impact of tax reform during the measurement period.

About Rudolph Technologies

Rudolph Technologies, Inc. is a leader in the design, development, manufacture and support of defect inspection, lithography, process control metrology, and process control software used by semiconductor and advanced packaging device manufacturers worldwide. Rudolph delivers comprehensive solutions throughout the fab with its families of proprietary products that provide critical yield-enhancing information, enabling microelectronic device manufacturers to drive down costs and time to market of their devices. Headquartered in Wilmington, Massachusetts, Rudolph supports its customers with a worldwide sales and service organization. Additional information can be found on the Company’s website at www.rudolphtech.com.

Forward Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 (the “Act”) which include Rudolph’s business momentum and future growth; the benefit to customers of Rudolph’s products and customer service; Rudolph’s ability to both deliver products and services consistent with our customers’ demands and expectations and strengthen its market position; Rudolph’s expectations regarding the semiconductor market outlook; Rudolph’s first quarter 2019 financial outlook; as well as other matters that are not purely historical data. Rudolph wishes to take advantage of the “safe harbor” provided for by the Act and cautions that actual results may differ materially from those projected as a result of various factors, including risks and uncertainties, many of which are beyond Rudolph’s control. Such factors include, but are not limited to, the Company’s ability to leverage its resources to improve its position in its core markets; its ability to weather difficult economic environments; its ability to open new market opportunities and target high-margin markets; the strength/weakness of the back-end and/or front-end semiconductor market segments; and fluctuations in customer capital spending. Additional information and considerations regarding the risks faced by Rudolph are available in Rudolph’s Form 10-K report for the year ended December 31, 2017 and other filings with the Securities and Exchange Commission. As the forward-looking statements are based on Rudolph’s current expectations, the Company cannot guarantee any related future results, levels of activity, performance or achievements. Rudolph does not assume any obligation to update the forward-looking information contained in this press release.