ASML Holding N.V. agreed to acquire Cymer Inc. for $2.55 billion in cash and stock on October 17. The two companies have collaborated in developing lithography systems for manufacturing semiconductors since 2011. They hope to close the deal in the first half of the year pending approvals from regulators and Cymer shareholders.

Skadden, Arps, Slate, Meagher & Flom: Richard Ely, Timothy Fesenmyer, and Neil Stronski.