Exhibit 99.1

CYMER REPORTS THIRD QUARTER 2012 OPERATING RESULTS

SAN DIEGO, Calif., October 26, 2012 - Cymer, Inc. (Nasdaq: CYMI), the world’s leading supplier of light sources used by chipmakers to manufacture advanced semiconductor devices, today announced operating results for the third quarter ended September 30, 2012.

For the third quarter of 2012:

Commenting on the results, Bob Akins, Cymer’s chief executive officer, said, “Third quarter profitability exceeded our expectations driven by higher gross margin and lower than forecasted operating expenses. Revenue was below our July guidance as deep ultraviolet (DUV) light source demand softened throughout the quarter. Additionally, customer acceptance of a Display Products Group (DPG) Gen 4 tool did not occur in the quarter. OnPulse revenue, which accounts for approximately 88 percent of our Installed Base Products (IBP) revenue, increased as compared to the prior quarter primarily due to a continued higher mix of ArF pulses and installed base growth. We demonstrated sustained 30 Watts EUV source expose power during the quarter and we completed the delivery of our first EUV 3300 source to ASML.”

In the third quarter of 2012, the company shipped 27 DUV light sources, of which 17 were ArF immersion and 10 were KrF, and the company installed 24 DUV light sources at chipmaker locations. Gross profit was $71.8 million for the third quarter of 2012, yielding a 54.6 percent gross margin. Total operating expenses, which include research and development and selling and administrative expenses, were $62.7 million. Total operating income was $9.0 million or approximately seven percent of revenue.

DUV and IBP bookings for the third quarter of 2012 totaled $112.4 million, resulting in a book-to-bill ratio of 0.86. Forty-seven percent of the DUV unit bookings were ArF immersion and 53 percent were KrF. The company ended the quarter with a DUV backlog of $50.3 million.

As of September 30, 2012, cash and investments totaled $305.1 million.

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Forward Looking Statements

This document contains “forward-looking statements” as that term is defined in the Private Securities Litigation Reform Act of 1995. Statements in this press release that are not strictly historical in nature are forward-looking statements. These statements include, but are not limited to statements regarding plans for the development and performance of the company’s EUV source technology, the company’s development of and manufacturing capability for its silicon crystallization tool for the display industry, and expectations for growth in Installed Base Products revenue. These statements are predictions based on current information and expectations and involve a number of risks and uncertainties. In addition, statements regarding backlog and book-to-bill ratios should not be read as predictions or projections of future performance. Actual events or results may differ materially from those projected in any of such statements due to various factors, including but not limited to: the risk that the company’s EUV sources, which are still under development and not capable of supporting the commercial production of integrated circuits, may not meet customer specifications or may have reliability or performance problems; the risk that commercial EUV systems may not be introduced by the company on time, or at all; the risk that a competitor’s EUV or other source may be selected over the company’s EUV source; the demand for semiconductors in general, and, in particular, for leading-edge devices with smaller geometries; cyclicality in the market for semiconductor manufacturing equipment; the timing of customer orders, shipments and acceptances; delays or cancellations by customers of their orders; the performance and market acceptance of the company’s new products or technologies; new and enhanced product offerings by competitors; the company’s ability to meet its production and product development schedules; the rate at which semiconductor manufacturers adopt new technologies and purchase and take delivery of photolithography tools from the company’s customers; the company’s ability to secure adequate supplies of critical components for its advanced products; the company’s ability to manage its expense levels and unanticipated expenses; the company’s ability to achieve its forecasted gross margin which includes its ability to absorb manufacturing costs; the company’s ability to align its cost structure with forecasted business levels; the inability to obtain Cymer shareholder approval or regulatory approval for the proposed transaction with ASML; the satisfaction of other conditions to the closing of the proposed transaction with ASML; the possibility that the length of time necessary to consummate the proposed transaction with ASML may be longer than anticipated; risks associated with integrating the businesses of Cymer and ASML; the possibility that the businesses of ASML and Cymer may suffer as a result of uncertainty surrounding the proposed transaction with ASML; the company’s ability to manage its foreign currency exposure; the performance and conditions in the United States and world financial markets; the policies and actions of the United States and other governments; and general economic conditions. The foregoing list of factors is not exhaustive. For a discussion of these and other factors which may cause our actual events or results to differ from those projected, please refer to the company’s most recent annual report on Form 10-K and quarterly reports on Form 10-Q, as well as other subsequent filings with the Securities and Exchange Commission (SEC). You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this press release. All forward-looking statements are qualified in their entirety by this cautionary statement, and the company undertakes no obligation to revise or update any forward-looking statements to reflect events or circumstances after the date of this press release.

About Cymer

Cymer, Inc. (Nasdaq: CYMI) is an industry leader in developing lithography light sources, used by chipmakers worldwide to pattern advanced semiconductor chips, and is pioneering a new silicon crystallization tool for the display industry. Cymer’s light sources have been widely adopted by the world’s top chipmakers and the company’s installed base comprises approximately 3,750 systems. Continuing its legacy of leadership, Cymer is currently pioneering the industry’s transition to EUV lithography, the next viable step on the technology roadmap for the creation of smaller, faster chips. The company is headquartered in San Diego, CA, has more than 1,200 employees on payroll (expressed in full time equivalents) and supports its customers from numerous offices around the globe. Cymer maintains a Web site to which it regularly posts press releases, SEC filings, and additional information about Cymer. Interested persons can also subscribe to automated e-mail alerts or RSS feeds. Please visit www.cymer.com.

Cymer and all other Cymer product or service names used herein are either registered trademarks or trademarks of Cymer, Inc. Any other marks mentioned herein are the property of their respective holders.

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CYMER, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)

(in thousands, except per share data)

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CYMER, INC.

CONSOLIDATED BALANCE SHEETS (UNAUDITED)

(in thousands)

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CYMER, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

(in thousands)

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