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Los Angeles Partners and Counsel

Mimi C. Cheng - Partner - Headshot
Mimi C. Cheng - Partner

Mimi is a Partner in Simpson Thacher’s Banking and Credit, Fund Finance and Backleverage and Investment-Backed Financing Practices, and has extensive experience counseling private equity funds, investment banks and other large financial institutions on the use of leverage products secured by, or referencing, public and private investment property. She regularly advises on financings designed to facilitate and support fund investment activities, including subscription facilities, NAV facilities, hybrid subscription and basket facilities, margin loans and other forms of backleverage. Mimi has represented clients including BlackRock, Blackstone, KKR, KSL Capital Partners, JPMorgan, Silver Lake Partners and Sixth Street Partners.

Michael W. Kaplan - Partner - Headshot
Michael W. Kaplan - Partner

As a Corporate Partner in the Firm’s Los Angeles office, Michael Kaplan focuses on advising private equity firms and their portfolio companies on mergers and acquisitions, securities offerings and general corporate matters. Mike also represents founders, venture investors, startups and early-stage companies on debt and equity financings as well as in connection with commercial agreements and other corporate matters.

Gregory B. Klein - Partner - Headshot
Gregory B. Klein - Partner Greg Klein is a Corporate Partner in the Firm’s Los Angeles office. Greg’s practice focuses on advising private equity firms, as well as public and private companies, in a variety of transactions, including mergers and acquisitions, dispositions, carve-outs, leveraged buyouts, equity financings, joint ventures and other direct investments. Greg also has extensive experience representing startups and early-stage companies on debt and equity financings as well as in connection with commercial agreements and other corporate matters. 
Chet A. Kronenberg - Partner - Headshot
Chet A. Kronenberg - Partner

Chet Kronenberg, senior Los Angeles litigator, represents clients in a wide range of complex commercial litigation, including defending clients in consumer, employment, insurance and securities lawsuits, and government investigations. Chet has served as lead counsel for clients such as Aptive Environmental, Banc of California, Beazley Group, Blackstone, Citibank, KKR, L3 Technologies, LG Display, Lion Capital, Nature Home Flooring, Pinnacle Foods, SiriusXM Radio, Siris Capital, Vivint, Inc., Vivint Solar, Vivo Capital, Whittaker, Clark & Daniels and Yingli. He has been recognized by The Legal 500 in multiple categories, including Securities Litigation, Insurance and Appellate. In addition, Chet has been named by Benchmark Litigation as a California “Litigation Star” and a “Labor & Employment Star.”

Jennifer J. Levitt - Partner - Headshot
Jennifer J. Levitt - Partner Jennifer Levitt is a Partner at Simpson Thacher & Bartlett LLP, where she is a member of the Banking and Credit Practice. Jennifer regularly represents financial sponsors in connection with debt financings for their private equity, real estate, infrastructure, mezzanine debt and other investment funds. She has extensive experience in complicated financings designed to provide fund-level leverage to facilitate and support investment activities, including subscription facilities, NAV facilities, margin loans, other forms of back-leverage and GP stake investments. Jennifer has represented clients including BlackRock, Blackstone, Carlyle, Centerbridge, KKR, KSL Capital Partners, Oaktree Capital Management and SoftBank. A leading advisor, Jennifer was recently named a “West Trailblazer” by The American Lawyer, which honors practitioners who have moved the needle in the legal industry.
Thomas A. Wuchenich - Partner - Headshot
Thomas A. Wuchenich - Partner

Tom Wuchenich is the Managing Partner of Simpson Thacher’s Los Angeles office and Co-Administrative Partner of the Firm. Tom represents a broad range of alternative asset management firms in the formation and ongoing operation of their private investment funds and separate accounts across a variety of asset classes. He also has significant experience in strategic transactions for asset management firms. Tom’s regular clients include such sponsors as Canyon Capital, Charger Investment Partners, CIM Group, Coral Tree Partners, Francisco Partners, Hellman & Friedman, KSL Capital Partners, Oaktree Capital Management, Platinum Equity, Prime Group and Technology Crossover Ventures. He has represented Oaktree Capital Group in its initial public and follow-on offerings, in its sale to Brookfield Asset Management and its acquisition of a majority interest in 17Capital, as well as Clearlake Capital Partners and Platinum Equity in their sales of minority stakes to third parties. Tom is regularly recognized as one of the leading private funds lawyers in The International Who’s Who of Business Lawyers, and was recently named to the 2019 “LA500: The Most Influential People in Los Angeles” by the Los Angeles Business Journal. He has served as a member of the Firm’s Executive Committee.