Keith Flaum

Keith Flaum

Silicon Valley

Email keith.flaum@​

Phone +1 650 463 4084

Fax +1 650 463 4199

Practice groupCorporate & Finance

Keith Flaum is a leading M&A lawyer with more than 25 years of experience representing publicly traded and privately held companies in domestic and cross-border merger and acquisition transactions and complex joint ventures, with a particular emphasis on representing information technology and life sciences companies. Keith is also a trusted adviser to boards of directors and special committees in the M&A context.

Keith's recent experience includes more than US$100 billion of M&A activity for some of the world's top technology companies, handling groundbreaking deals throughout the United States, Europe, Asia, the Middle East, and elsewhere.

Legal guides consistently recognize Keith as one of the top legal minds in M&A. In 2016, The National Law Journal named him a "Trailblazer" in M&A while the LMG Life Sciences Guide deemed him a "Life Sciences Star." Law360 has recognized him as both a "Technology MVP" and "M&A MVP," and in 2015, the Daily Journal named him one of the top 100 lawyers in California. Chambers USA ranks him in their highest tier, Band 1, for California Corporate/M&A.

Keith has been actively involved for more than 15 years in the M&A Committee of the ABA's Section of Business Law, including as Vice Chair of the Committee, Chair of the Market Trends Subcommittee, Co-Chair of the International M&A Subcommittee, and a member of the Subcommittee on Acquisitions of Public Companies.

Awards and recognitions


M&A, Highly Regarded


Technology and Telecommunications, Highly Regarded


Acritas Star
Acritas Stars Independently Rated Lawyers


Corporate/M&A (Northern California)
Chambers USA


Corporate M&A (International & Cross-Border) (USA)
Chambers Global

2015, 2019

Top 100 Lawyers in California
Daily Journal


M&A/Corporate and Commercial: M&A: Large Deals ($1bn+), Leading Lawyer
Legal 500 US


Global Elite Thought Leader, M&A
Who's Who Legal


Corporate Governance
Who's Who Legal

2016, 2018-2019

Life Science Star
LMG Life Sciences Guide


Healthcare: Life Sciences
Legal 500 US


Trailblazer in M&A
The National Law Journal

2013, 2015-2016

Technology MVP



Education and admissions


J.D., University of California, Davis School of Law, 1989

B.A., University of California, Los Angeles, 1986

Bar admissions and qualifications


Representative experience

Facebook's US$16bn acquisition of WhatsApp.*

Advising The Anschutz Corporation in respect of the US$5.8bn acquisition of Regal Entertainment Group by Cineworld Group plc.

Jazz Pharmaceuticals' US$1bn acquisition of Gentium S.p.A.*

Merz Pharma on its acquisitions of BioForm, Ulthera, OnLight Sciences, Neocutis, and the sale of its medical dermatology business to Sebela Pharmaceuticals.*

Oracle's acquisitions of NetSuite, MICROS Systems, Taleo Corporation, Acme Packet, Inc., Aconex Limited, Eloqua Inc., Textura Corporation, and Opower, Inc. for >US$20bn.*

Reid Hoffman, founder and controlling stockholder of LinkedIn, in LinkedIn's acquisition by Microsoft for US$26.2bn.*

Chewy, Inc. in its US$3.3bn sale to PetSmart in what is reported to be the largest e-commerce deal ever.*

Advised Varian Medical/Varex Imaging Corporation on its purchase of PerkinElmer’s medical imaging business for US$276m.*

Advised XenoPort on its US$446.6m sale to Arbor Pharmaceuticals.*

zulily, inc. in its US$2.4bn sale to Liberty Interactive Corporation.*

Applied Materials' US$29bn merger with Tokyo Electron, and its acquisition of Varian Semiconductor Equipment for US$4.9bn.*

Illumina's successful defense of Roche's US$6.2bn hostile takeover attempt.*

eBay's acquisitions of GSI Commerce for approximately US$2.4bn, GittiGidiyor (Turkey), and Brands4Friends (Germany).*

eBay's sale of a majority interest in Skype for US$1.9bn and its enterprise business to Sterling Partners and Permira for US$925m.*

RF Micro Devices' US$1.6bn merger of equals with TriQuint Semiconductor.*

Riverbed Technology's acquisition of OPNET Technologies for US$1bn, as well as acquisitions of Zeus Technology in the United Kingdom and Aptimze in New Zealand.*

Opera Software in acquisitions of companies in Brazil, Turkey, Canada, Argentina, and numerous acquisitions in the United States.*

PayPal in its joint venture with SOFTBANK relating to online payment technology in Japan.

Zynga in its joint venture with SOFTBANK relating to online gaming in Japan and its acquisition of Unoh in Japan.

*Matter handled prior to joining Hogan Lovells.

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