
Representing a broad base of international and domestic issuer and manager clients, Simpson Thacher & Bartlett LLP heavily specializes in the whole spectrum of equity-linked and debt securities offerings, in addition to high-value IPOs. The team shows strength in managing multiple offerings of ordinary and common shares, with the main focus being on the aviation, energy, and retail industries. The practice is led by Joshua Ford Bonnie, Roxane Reardon, and Kenneth Wallach, with the Washington DC-based former being an expert in counselling companies on complex spin-offs and strategic transactions. From New York, Reardon and Wallach bring vast experience in handling single-tranche convertible note offerings and corporate finance transactions to the outfit, while David Azarkh predominantly concentrates on leveraged buyouts. In Palo Alto, William Brentani is a general securities expert, and John Ericson and Richard Fenyes both concentrate on restructurings, debt capital markets transactions, and acquisition finance. All lawyers are New York-based unless otherwise mentioned.
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- Profile
Key clients
- AEP American Electric Power Co.
- Ambipar Participacoes e Empreendimentos S.A.
- Asahi Group Holdings, Ltd.
- Banco De Credito E Inversiones
- Barclays Capital Inc.
- Blackstone Credit
- BrightSpring Health Services, Inc.
- BrightView
- Citigroup Global Markets Inc.
- Cohen & Steers Capital Management, Inc.
Work highlights
- Represented Waystar Holding Corp. (“Waystar”) in connection with its $1.1 billion initial public offering of common stock. Shares of Waystar Holding Corp. are now listed on The Nasdaq Global Select Market under the ticker symbol “WAY.”
- Represented BrightSpring Health Services, Inc., a portfolio company of Kohlberg Kravis Roberts & Co. L.P., in connection with its $1.1 billion initial public offering of common stock and its concurrent public offering of 6.75% tangible equity units.
- Represented the underwriters, led by Morgan Stanley & Co. LLC and J.P. Morgan Securities LLC, in connection with the $819.7 million initial public offering of Astera Labs, Inc. (“Astera Labs”).
Lawyers
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Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.

Joseph Kaufman
Roxane Reardon
Practice head
Joshua Ford Bonnie; Roxane Reardon; Kenneth Wallach
Other key lawyers
David Azarkh; William Brentani; Mark Brod; John Ericson; Richard Fenyes; Joe Kaufman; Edgar Lewandowski; Heidi Mayon; Arthur Robinson; Brian Rosenzweig; Marisa Stavenas; Sunny Cheong; Will Golden; Hui Lin; John O’Connell; Jonathan Ozner