Exhibit 99.1

Nanometrics Reports Third Quarter 2017 Financial Results

MILPITAS, Calif., November 2, 2017 — Nanometrics Incorporated (NASDAQ: NANO), a leading provider of advanced process control systems, today announced financial results for its fiscal third quarter, which ended September 30, 2017.

Q3 2017 Highlights:

A reconciliation between GAAP operating results and non-GAAP operating results is provided following the financial statements that are part of this release and on the investor page of Nanometrics' website. Non-GAAP results exclude the impact of amortization of acquired intangibles, restructuring, executive search costs and certain discrete tax items.

“The positive business environment continues, for our industry as well as for Nanometrics, as we drive to record business levels in 2017,” commented Dr. Timothy J. Stultz, president and chief executive officer. “Whereas third-quarter revenue results were hampered by the timing of customer acceptance of a few systems, we continue to expect fourth-quarter revenues to be at record levels – significantly above our previous quarterly highs – even before adding the contribution of revenues delayed from the third quarter. With wafer fab equipment spending tracking to an all-time high – driven largely by significant investments in 3D-NAND, where Nanometrics has a strong market leadership position – we are expecting 2017 to be our fourth straight year of double-digit revenue growth, with record annual revenues and increasing earnings per share for our company.”

Third Quarter 2017 Summary

Revenues for the third quarter of 2017 were $56.7 million, down 12.0% from $64.4 million in the second quarter of 2017, and down 3.5% from $58.7 million in the third quarter of 2016. On a GAAP basis, gross margin was 54.1%, compared to 52.2% in the prior quarter and 51.8% in the year-ago period. Operating income was $7.5 million, compared to $10.7 million in the prior quarter and $9.1 million in the year-ago period. Net income was $5.8 million or $0.22 per diluted share, compared to $8.3 million or $0.32 per diluted share in the prior quarter and $7.9 million or $0.31 per diluted share in the third quarter of 2016.

On a non-GAAP basis, which excludes amortization of acquired intangible assets and restructuring, gross margin was 54.4%, compared to 52.4% in the prior quarter and 52.5% in the year-ago period. Gross margin improved primarily as a result of higher-than-expected

service margins in the quarter. Non-GAAP operating income was $7.9 million, compared to $11.1 million in the prior quarter and $9.5 million in the third quarter of 2016. Non-GAAP net income, which adjusts for amortization of intangible assets, restructuring, executive search costs and certain discrete tax items, was $5.7 million or $0.22 per diluted share, compared to $7.8 million or $0.30 per diluted share in the prior quarter and $8.3 million or $0.33 per diluted share in the third quarter of 2016.

Business Outlook

Management expects fourth-quarter 2017 revenues in the range of $72 to $80 million. Gross margin is expected to be in the range of 53.5% to 54.5% on both a GAAP and non-GAAP basis. Management expects fourth-quarter operating expenses to range between $23.5 million and $24.3 million on both a GAAP and non-GAAP basis, and earnings in the range of $0.40 to $0.50 per diluted share on both a GAAP and non-GAAP basis.

Conference Call Details

A conference call to discuss third quarter 2017 results will be held today at 4:30 p.m. EDT (1:30 p.m. PDT). To participate in the conference call, the dial-in numbers are (877) 374-4041 for domestic callers and (253) 237-1156 for international callers. The conference ID is 51893339. A live and recorded webcast and supplemental financial information will be made available on the investor page of the Nanometrics website at www.nanometrics.com.

Use of Non-GAAP Financial Information

The non-GAAP gross profit, gross margin, operating income, operating income margin, net income, net income per share, which exclude certain expenses, charges and special items, and free cash flow, were not prepared in accordance with U.S. Generally Accepted Accounting Principles (GAAP). Management uses non-GAAP financial results, which exclude amortization of acquired intangibles assets, restructuring charges, executive search costs and certain discrete tax items, to evaluate the company’s ongoing performance and to enable comparison to other periods that did not include these items. The company believes the presentation of non-GAAP results is useful to investors for analyzing ongoing business trends, comparing performance to prior periods, and enhancing the investor’s ability to view the company’s results from management’s perspective; however, investors are cautioned that other companies may calculate these measures differently than Nanometrics does, which would limit the usefulness of these financial measures. A table presenting a reconciliation of GAAP results to non-GAAP results is included at the end of this press release and is available on the investor page of the Nanometrics website at www.nanometrics.com.

About Nanometrics

Nanometrics is a leading provider of advanced, high-performance process control metrology and inspection systems used primarily in the fabrication of semiconductors and other solid-state devices, including sensors, optoelectronic devices, high-brightness LEDs, discretes and data storage components. Nanometrics’ automated and integrated metrology systems measure critical dimensions, device structures, topography and various thin film properties, including three-dimensional features and film thickness, as well as optical, electrical and material properties. The company’s process control solutions are deployed throughout the fabrication process, from front-end-of-line substrate manufacturing, to high-volume production of semiconductors and other devices, to advanced three-dimensional wafer-level packaging applications. Nanometrics’ systems enable advanced process control for device manufacturers, providing improved device yield at reduced manufacturing cycle time, supporting the accelerated product life cycles in the semiconductor and other advanced device markets. The company maintains its headquarters in Milpitas, California, with sales and service offices worldwide. Nanometrics is traded on NASDAQ Global Select Market under the symbol NANO. Nanometrics’ website is http://www.nanometrics.com.

Forward Looking Statements

Certain statements in this press release, including those found in Dr. Stultz’s quote, and under the caption “Business Outlook,” are forward-looking statements that involve a number of risks and uncertainties that could cause actual results to differ materially from those described in this release. Although Nanometrics believes that the expectations reflected in the forward-looking statements are reasonable, actual results could differ materially from these expectations due to a variety of factors, including, but not limited to: decreased levels of industry spending; slowing adoption rate of Nanometrics’ new products; Nanometrics’ inability to gain additional market share, increase sales, ship products as scheduled, achieve customer acceptance of new products, or outperform the industry; decreased demand for Nanometrics’ products; shifts in the timing of customer orders and product shipments; technology adoption rates; changes in customer and product mix; changes in market share; changes in operating expenses; and general economic conditions. For additional information and considerations regarding the risks faced by Nanometrics that could cause actual results to differ materially, see its annual report on Form 10-K for the year ended December 31, 2016, as filed with the Securities and Exchange Commission on March 3, 2017 including under the caption “Risk Factors,” as well as other periodic reports filed with the SEC from time to time. Nanometrics disclaims any obligation to update information contained in any forward-looking statement, except as required by law.

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CONDENSED CONSOLIDATED BALANCE SHEETS

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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

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RECONCILIATION OF GAAP TO NON-GAAP RESULTS

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