Rebecca O'Brien

BECKY O’BRIEN advises on structured finance transactions, with a focus on CLOs and private credit, including rated feeder transactions and CFOs. She also has extensive experience across securitization transactions involving a wide range of asset classes, as well as derivatives, and regularly counsels clients on cross-border regulatory matters, including the U.S. risk retention rules, the Volcker Rule, the Investment Advisers Act, NAIC considerations, and EU and UK securitization regulations.

“Rebecca’s proactive and client-focused approach, good judgment and deep knowledge of the CLO market and transaction process make her an excellent adviser in complex CLO transactions.”

“Rebecca is exceptional across all dimensions. Her client service is outstanding and she is always responsive, solutions-oriented and able to manage fast-moving CLO timelines with calm efficiency.”
Chambers USA 2026

Becky was ranked by Chambers USA for Capital Markets: Securitization: CLOs Nationwide (2026), where clients praised her as being a “thoughtful and trusted expert who is wonderful to work with,” and that “things run very smoothly with Rebecca at the helm and she’s also someone who knows the deep nuances of CLO documentation” (2026).

• Nuveen Asset Management as portfolio manager across its Symphony CLO platform.
• UBS Asset Management (fka Credit Suisse Asset Management) as portfolio manager across the Madison Park Funding, One Eleven Funding, and Madison Park Euro Funding CLO platforms.
• Scotiabank as arranger and structurer on a wide variety of CLO, CFO, rated feeder, and ABL transactions.
• RREEF/DWS group as portfolio manager in connection with the RIN infrastructure CLO platform.
• International Finance Corporation on its emerging markets CLO platform.
• Nuveen Asset Management on a wide variety of rated feeder and funds transactions across CPACE and energy and infrastructure credit.
• Coller Capital as manager in connection with its CFO transactions in relation to private equity and private credit assets.
• JP Morgan Alternative Asset Management on the establishment of a rated feeder into a credit fund.
• Atalaya as manager in connection with a rated feeder into one of its managed funds.
• Oceanview Insurance in connection with two CFO transactions.
• Brigade Capital Management as portfolio manager on its Battalion CLO platform.
• New York Life Investment Management as portfolio manager on its Flatiron CLO platform.
• Natixis as structurer and placement agent on a cross border CFO transaction.
• Citi as AAA lender in CLO transactions.

The above matters were handled prior to joining Sidley.

• Women in Securitization, Member

• Safe Passage
• Services for the UnderServed (S:US)
• My Sisters’ Place