Kirke Hasson

Pillsbury Winthrop Shaw Pittman LLP

Kirke M. Hasson, Pillsbury’s Trials team head, handles complex intellectual property, contract and fiduciary duty cases. Kirke is an experienced litigator who prosecutes and defends a range of complex corporate cases, including disputes related to intellectual property, licensing and partnership agreements, and fiduciary duties for clients in the life sciences space.

His broad practice also encompasses defending challenges to mergers and acquisitions, advising clients involved in corporate and committee investigations, and litigating shareholder and securities actions.

He represents clients in federal and state courts, appellate proceedings and arbitration forums. For more than a decade, Kirke was the national co-leader of Pillsbury’s Litigation practice.


  • Pursued action for Invitae Corporation to have declared invalid genetic testing patents asserted by Myriad Genetics in a multidistrict litigation in Utah. Following extensive litigation, Myriad abandoned its patent enforcement efforts.
  • Represented selling stockholders of a drug development company regarding the collection of milestones related to regulatory progress of a drug.
  • Campagnuolo v. IDEC Pharmaceuticals (U.S. District Court, S.D. Cal.) – Action challenging merger of IDEC Pharmaceuticals and Biogen
  • Klein v. Salvi (S.D.N.Y.) – Defense of section 16(b) case relating to pharmaceutical company acquisition of biotech company in Eastern Europe
  • Equity-Linked Investors v. Adams (Delaware Chancery Court) – Action challenging actions of directors of Genta regarding stock offering said to undervalue corporate assets regarding biotechnology company active in antisense field
  • Represented former program head of major pharmaceutical company regarding federal investigation of alleged off-label promotion and violation of anti-kickback laws
  • State of California ex rel. Richardson v. IREF et al. (Sicor) (California Superior Court) – Qui tam action challenging underpayments allegedly made to the University of California by a foundation and pharmaceutical developers
  • Chiron v. SourceCF (U.S. District Court, N.D. Cal.) – Action alleging marketing of unsafe medical device for use in combination with drugs for treatment of CF

Associations : American Conservatory Theater, Chair of the Board of Trustees


  • J.D., Harvard Law School, 1974
  • B.A., Yale University, 1971

ADMISSIONS : California


Rate : $$$

What types of cases Attorney Kirke Hasson & Pillsbury Winthrop Shaw Pittman LLP can handle?
Pillsbury Winthrop Shaw Pittman LLP can handle cases related to laws concerning Financial Services, Corporate, Litigation, Intellectual Property. We manually verify each attorney’s practice areas before approving their profiles and reviews on our website.
Where is Pillsbury Winthrop Shaw Pittman LLP located?
Pillsbury Winthrop Shaw Pittman LLP is located at 4 Embarcadero Center, San Francisco, CA 94111, USA. You can reach out to Pillsbury Winthrop Shaw Pittman LLP using their phone line 415.983.1077. You can also check their website or email them at [email protected].
How much would it cost to hire Pillsbury Winthrop Shaw Pittman LLP?
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Pillsbury Winthrop Shaw Pittman LLP
Embarcadero Center 4
San Francisco 94111 CA US
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