Tierney O'Rourke
Advises U.S. and international clients on a range of private and public M&A transactions, as well as securities offerings and corporate matters.
Tierney advises U.S. and international clients on a range of private and public M&A transactions, including cross-border transactions. Her M&A experience includes mergers, securities acquisitions, carve-outs, majority and minority investments, joint ventures and activism defense.
She also advises clients on securities and corporate matters, including debt and equity offerings, public company reporting and corporate governance. Her capital markets practice includes representation of both issuers and underwriters.
Tierney’s practice spans a range of industries, with a particular focus on the technology, fintech, life sciences and financial services sectors.
Experience highlights
Recent Representations
- Immedica Pharma acquisition of pegzilarginase assets from Aeglea
- Upgrade $100 million acquisition of Uplift
- Bloom Energy $632.5 million green convertible notes and capped call transactions
- Arcade Beauty out-of-court restructuring
- Gilead Sciences $405 million acquisition of MiroBio
- PayPal $3 billion notes offering and concurrent tender offer
- HP $3.3 billion acquisition of Poly
- Nubank $2.6 billion IPO
- CrowdStrike Holdings acquires SecureCircle
- Mirion business combination with GS Acquisition Holdings Corp II
- Nubank $750 million Series G-1 financing
- Paymentus $241.5 million IPO
- Coursera $519.1 million IPO
- Surgalign Holdings $37.5 million follow-on offering
- Aligos Therapeutics $150 million IPO
- SS&C Technologies $120 million acquisition of Innovest Systems
Education
- Gerald Gunther Prize in Deals II
- Judge Thelton E. Henderson Prize in Organizations & Transactions Clinic
- Managing Editor, Stanford Journal of International Law
- Executive Editor, Stanford Law Review
- Phi Beta Kappa
Professional history
- Counsel, 2024-present
- Davis Polk since 2017
Qualifications and admissions
- State of California