Piper Jaffray Acquires Sandler O'Neill & Partners for $485 Million

Piper Sandler Acquires Stamford Partners LLP

June 13, 2022

Professional Services

Piper Sandler Companies has completed the acquisition of Stamford Partners LLP, a London-based specialist M&A boutique focused on European food and beverage and related consumer sectors. The deal expands Piper Sandler’s European investment banking capabilities and adds dedicated food & beverage advisory talent to its consumer advisory platform.

Piper Sandler Acquires DBO Partners

July 6, 2022

Professional Services

Piper Sandler (NYSE: PIPR) entered into a definitive agreement to acquire DBO Partners, an independent technology investment banking firm based in the San Francisco Bay Area. The transaction is intended to expand Piper Sandler’s technology investment banking capabilities and scale, including private equity general partner advisory services. Piper Sandler later announced the acquisition was completed.

Piper Sandler Acquires G Squared Capital Partners

September 17, 2025

Financial Services

Piper Sandler Companies entered into a definitive agreement to acquire G Squared Capital Partners, a Washington, D.C.-area boutique investment bank focused on government services and defense technology. The deal is intended to integrate G Squared’s specialty coverage into Piper Sandler’s technology investment banking platform and expand capabilities in federal markets, with the transaction expected to close in Q3 2025.

Piper Sandler Acquires MENA Growth Partners to Build GCC Investment Banking Hub

January 19, 2026

Financial Services

Piper Sandler Companies entered into a definitive agreement to acquire MENA Growth Partners, a merchant bank based in Abu Dhabi, to serve as its strategic investment banking hub across the GCC region. The platform is intended to pair MENA Growth Partners’ local relationships with Piper Sandler’s advisory and capital markets capabilities, including energy, infrastructure, chemicals, healthcare, and technology coverage. The deal is expected to close in the first quarter of 2026, subject to customary closing conditions.

Piper Sandler Companies Acquires Cornerstone Macro

February 7, 2022

Financial Services

Piper Sandler Companies entered into a definitive agreement to acquire independent research firm Cornerstone Macro. The acquisition adds Cornerstone Macro’s macro research and equity derivatives trading capabilities to Piper Sandler’s institutional equities research, sales, and trading platform, with Cornerstone Macro continuing to provide research as part of Piper Sandler & Co.

Piper Sandler to Acquire Aviditi Advisors

June 12, 2024

Financial Services

Piper Sandler Companies entered into a definitive agreement to acquire Aviditi Advisors, an alternative investment bank providing fundraising, secondary solutions, and capital markets services. The deal is expected to close in late Q3 2024, subject to regulatory approvals and customary closing conditions.