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    Home /  Lawyers /  Mike Ringler

    Mike Ringler

    Partner

    Mike Ringler Headshot Photo Portrait backdrop

    Palo Alto

    +1-650-461-5600

    |

    ringlerm@sullcrom.com

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    Mike Ringler is Co-Head of Sullivan & Cromwell’s Technology Group and a partner in the Firm’s M&A Group. Resident in the Firm’s Palo Alto office, Mike is a nationally recognized M&A adviser, focusing on technology-related industries. He has represented large industry-leading companies, as well as smaller industry disruptors, in a broad range of technology sectors, including the semiconductor, networking, software and internet industries. Mike regularly advises boards, special committees and management teams on mission-critical and transformative M&A transactions. He also advises boards and special committees confronting challenges to corporate control, such as unsolicited acquisition proposals, proxy contests and shareholder activism. Mike is Band 1 ranked in Chambers USA and is named in Chambers Global and Best Lawyers in America. He is also named in Lawdragon’s Leading Dealmakers in America guide and has been recognized as an M&A MVP by Law360. He has been recognized on many occasions as a leader in his field by national and statewide publications, including The American Lawyer, The New York Times, California’s Daily Journal and IFLR1000. He was named a Dealmaker of the Year by The American Lawyer in 2015 and 2021.

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    Spotlight

    xAI and X Merge in a $113 Billion Transaction

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    • Experience
    • Rankings and Recognitions
    • News
    • Credentials
    • Related Practices
    Experience

    Experience

    • Elon Musk, xAI and X on the $113 billion merger of xAI and X
    • Elon Musk in his $44 billion acquisition of Twitter*
    • Ansys in its $35 billion sale to Synopsys*
    • Splunk in its $30 billion sale to Cisco Systems*
    • Hewlett-Packard in its $25 billion acquisition of Compaq (and related proxy fight with Walter Hewlett) and its $5 billion acquisition of Mercury Interactive*
    • CA Technologies in its $19 billion sale to Broadcom*

    • Freescale in its $19 billion sale to a consortium of private equity financial sponsors*
    • Livongo Health in its $18.5 billion sale to Teladoc*
    • Seagate in its $18 billion three-party sale to Silver Lake Partners and Veritas*
    • Proofpoint in its $12.3 billion sale to Thoma Bravo*
    • SK Hynix in its $9 billion acquisition of Intel’s memory business*
    • Credit Karma in its $8 billion sale to Intuit*
    • Pixar in its $8 billion sale to The Walt Disney Company*
    • Sun Microsystems in its $8 billion sale to Oracle and its $2 billion acquisition of Cobalt Networks*
    • McAfee in its $7.7 billion sale to Intel*
    • Mulesoft in its $7 billion sale to salesforce*
    • Business Objects in its $7 billion sale to SAP*
    • Entegris in its $6.5 billion acquisition of CMC Materials*
    • Coherent in its initially announced $5.7 billion sale to Lumentum, followed by Coherent’s subsequent responses to competing acquisition proposals from MKS Instruments, II-VI and Lumentum in a three-party bidding war culminating in Coherent’s $7 billion sale to II-VI*
    • Informatica in its $5.5 billion sale to a consortium of private equity financial sponsors*
    • LSI in its $5.2 billion merger with Agere Systems*
    • Cypress Semiconductor in its $5 billion merger of equals with Spansion*
    • FEI in its $5 billion sale to Thermo Fisher Scientific*
    • Riverbed Technology in its $4 billion sale to Thoma Bravo*
    • AppDynamics in its $4 billion sale to Cisco Systems*
    • Solectron in its $3.6 billion sale to Flextronics*
    • Trulia in its $3.5 billion merger with Zillow*
    • 3Com in its $3.5 billion sale to Hewlett-Packard*
    • Aruba Networks in its $3 billion sale to Hewlett-Packard*
    • Xperi Corporation in its $3 billion merger with TiVo Corporation*
    • Salesforce in its $2.5 billion acquisition of ExactTarget*
    • 3PAR in its initially announced $1.7 billion sale to Dell, followed by 3PAR’s subsequent responses to an unsolicited acquisition proposal from Hewlett-Packard culminating in 3PAR’s $2.5 billion sale to Hewlett-Packard*
    • The GoDaddy Group in its $2.3 billion sale to a consortium of private equity financial sponsors and its $2 billion acquisition of Host Europe Group*
    • Taleo in its $2.2 billion sale to Oracle*
    • Redback Networks in its $2.2 billion sale to Ericsson*
    • Flatiron Health in its $2 billion sale to Roche*
    • Apptop in its $2 billion sale to Vista Equity Partners*
    • Marketo in its $2 billion sale to Vista Equity Partners*
    • Iora Health in its $2 billion sale to 1Life Healthcare*
    • F5 Networks in its $1 billion acquisition of Shape Security*

    *Denotes representations undertaken prior to joining S&C.

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    Rankings and Recognitions

    Rankings and Recognitions

    • Chambers USA: America’s Leading Lawyers for Business, Band 1
    • Chambers Global: The World’s Leading Lawyers for Business
    • Who’s Who Legal: Thought Leaders USA - M&A 2023 and Global Leader M&A 2022
    • Lawdragon’s 500 Leading Lawyers in America, 2024

    • Lawdragon’s 500 Leading Dealmakers in America
    • Business Insider, “The 29 Lawyers Leading Billion-Dollar M&A Deals,” 2021
    • The Best Lawyers in America, listed annually since 2010, including being honored as a 2017 M&A Lawyer of the Year
    • Law360 2021 Mergers and Acquisitions MVP
    • BTI Consulting Group M&A Client Service All-Star, 2021
    • The Legal 500, which included Mr. Ringler in its 2024 M&A Private Practice Powerlist
    • MergerLinks Dealmaker, 2023
    • The American Lawyer, Dealmaker of the Year, 2021 and 2015
    • Daily Journal, California Lawyer Attorneys of the Year (CLAY) Award, 2021 (in recognition of work on behalf of Livongo in its $18.5 billion sale to Teladoc Health)
    • Daily Journal’s 2022, 2021, 2019, 2018, 2015 and 2012 lists of the Top 100 Lawyers in California
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    News

    News

    • xAI and X Merge in a $113 Billion Transaction

      March 28, 2025
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    Credentials

    Credentials

    Education

    • Georgetown University Law Center, J.D., 1995
    • University of Michigan, B.S., 1992

    Bar Admissions

    • California
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    Related Practices

    Related Practices

    • General Practice
    • Corporate Governance
    • Mergers & Acquisitions
    • Technology
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