Tierney O'Rourke
Lawyers
Advises U.S. and international clients on a range of private and public M&A transactions, joint ventures and securities 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 equity offerings, public company reporting and corporate governance.
Tierney’s practice spans a range of industries, with a particular focus on the technology, fintech and financial services sectors.
Experience
Mergers & Acquisitions
- Altair Engineering’s $10.6 billion acquisition by Siemens
- CoreWeave’s:
- $9 billion contested acquisition of Core Scientific
- $1.7 billion acquisition of Weights and Biases
- acquisition of Monolith AI
- HP’s $3.3 billion acquisition of Poly
- McKesson’s $850 million acquisition of an 80% interest in PRISM Vision
- Gilead Sciences’ $405 million acquisition of MiroBio
- Truist’s sale of Sterling Capital Management to Guardian Capital
- Mirion’s $2.6 billion combination with GS Acquisition Holdings Corp II, a SPAC
- Goldman Sachs Merchant Banking Division’s $500 million investment in InhabitIQ
- Equinix’s $335 million acquisition of Packet Host
- SS&C Technologies’ $120 million acquisition of Innovest Systems
- Immedica Pharma’s acquisition of pegzilarginase assets from Aeglea
- Upgrade’s
- $100 million acquisition of Uplift
- Series G equity financing
- CrowdStrike’s acquisition of SecureCircle
- Arcade Beauty’s out-of-court restructuring
Capital Markets
- Uber Technologies’ $8.1 billion IPO
- PayPal’s $3 billion notes offering and concurrent tender offer
- Nubank’s $2.6 billion IPO, Senior Preferred financing and Series G-1 financing
- Hub International’s $1.6 billion private placement
- Bloom Energy’s $632.5 million green convertible notes and capped call transactions
- Citrix’s $750 million notes offering
- Coursera’s $519.1 million IPO
- AssetMark’s $316 million IPO
- Paymentus’ $241.5 million IPO
- Aligos Therapeutics’ $150 million IPO
- Surgalign Holdings’ $37.5 million follow-on offering
General Corporate Advice
- Tierney regularly provides general corporate advice to companies, including Arcade Beauty, AssetMark, CoreWeave, Upgrade, Plaid and TWG
Education
J.D., Stanford Law School
- 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
B.A., American Studies, Stanford University
- Phi Beta Kappa
Qualifications and admissions
- State of California