
Corporate Finance
Capital Markets
Securities Law
Corporate Governance
John G. O'Connell is a Partner at Simpson Thacher & Bartlett in New York City, specializing in corporate finance with a focus on capital markets and securities law. He has extensive experience in high yield and investment grade debt offerings, IPOs, and acquisition financings across various industries, including technology, healthcare, and consumer retail. John is known for his deep market knowledge and expertise in corporate governance. He earned his J.D. from Villanova University School of Law in 2011 and his B.A. from Villanova University in 2008. John is admitted to practice in New York.
John O’Connell's representative experience includes advising:

- Symetra Life Insurance Company completed a financing with Wells Fargo Securities, LLC, BofA Securities, Inc., J.P. Morgan Securities LLC and U.S. Bancorp Investments, Inc. on not available. - Deal value was 4400000000 Sector: Financial Services; Location: USA. - On the acquirer side, legal counsel was not available, led by David Azarkh, John O.
Jul 24 2025
4B
Finance
Partner
2021 – Unknown
Associate
2012 – 2021

- Univision Communications Inc. entered into financing with J.P. Morgan Securities LLC in a financing on not available. - Deal value was 2200000000 Sector: Media; Location: USA. - On the acquirer side, counsel was not available; key lawyer(s): John O.
Jul 22 2025
2B
Finance
1 min