
Kirby Hsu
Associate
- Bio
- Winning Matters
- Professional Affiliations
- Publications
- News
An experienced litigator, Kirby Hsu represents a wide range of clients—such as Fortune 500 companies, financial institutions, startups, and individuals—in their most challenging cases and investigations. Kirby focuses his practice on complex commercial litigation, class action defense, government investigations, and securities litigation.
Kirby counsels leading clients at every stage of litigation in both state and federal courts. He has in-depth experience developing trial strategy, taking and defending depositions, and drafting pleadings, demand letters, and dispositive motions.
Kirby’s representative matters include:
- Represented solar power solutions company in several consumer arbitrations.
- Represented a bank and a multinational retailer in a consumer class action in federal court.
- Represented a fintech company in a commercial lease litigation.
- Represented a thermal imaging component manufacturer in a business-tort action in federal court.
- Represented an IT consulting company in a trade secrets action in state court.
- Represented directors and officers of a public company in a securities class action in federal court.
- Represented a blockchain technology company in a SEC investigation.
- Represented an individual in fraudulent-transfer action brought by a SEC-appointed receiver in state court.
Kirby also maintains an active pro bono practice, which has included representing clients in immigration court proceedings.
Prior to joining Willenken, Kirby practiced at Baker McKenzie. During law school, he first chaired drunk-driving jury trials as a student prosecutor. Kirby’s interests include photography, reading fiction, and spending time with his wife and dogs. Kirby is conversant in Mandarin Chinese.

In 2022, Kirby was selected by the firm to the Leadership Council on Legal Diversity (LCLD) Pathfinders Program.
While in college, Kirby taught seventh-grade math at an under-served middle school in Las Vegas as a Teach For America corps member.
- “Short Squeeze’ Class Actions Face Uphill Battle,” Law360, February 2021, co-author
- “Could the SEC Use Dealer Registration Requirements to Target Investors in PIPE Transactions?” Hedge Fund Law Report, November 5, 2020, co-author
- “Defending Against COVID-19 Tuition Refund Class Actions,” Law360, June 8, 2020, co-author
- “9th Circ. Denials Sustain Consumer Arbitration Hurdles,” Law360, April 27, 2020, co-author
- “After Oral Argument in ‘Liu’ Case, SCOTUS Poised to Curtail SEC’s Broad Use of Disgorgement,” The Recorder, March 5, 2020, co-author
Biography
An experienced litigator, Kirby Hsu represents a wide range of clients—such as Fortune 500 companies, financial institutions, startups, and individuals—in their most challenging cases and investigations. Kirby focuses his practice on complex commercial litigation, class action defense, government investigations, and securities litigation.
Kirby counsels leading clients at every stage of litigation in both state and federal courts. He has in-depth experience developing trial strategy, taking and defending depositions, and drafting pleadings, demand letters, and dispositive motions.
Kirby’s representative matters include:
- Represented solar power solutions company in several consumer arbitrations.
- Represented a bank and a multinational retailer in a consumer class action in federal court.
- Represented a fintech company in a commercial lease litigation.
- Represented a thermal imaging component manufacturer in a business-tort action in federal court.
- Represented an IT consulting company in a trade secrets action in state court.
- Represented directors and officers of a public company in a securities class action in federal court.
- Represented a blockchain technology company in a SEC investigation.
- Represented an individual in fraudulent-transfer action brought by a SEC-appointed receiver in state court.
Kirby also maintains an active pro bono practice, which has included representing clients in immigration court proceedings.
Prior to joining Willenken, Kirby practiced at Baker McKenzie. During law school, he first chaired drunk-driving jury trials as a student prosecutor. Kirby’s interests include photography, reading fiction, and spending time with his wife and dogs. Kirby is conversant in Mandarin Chinese.
Winning Matters
Professional Affiliations
In 2022, Kirby was selected by the firm to the Leadership Council on Legal Diversity (LCLD) Pathfinders Program.
While in college, Kirby taught seventh-grade math at an under-served middle school in Las Vegas as a Teach For America corps member.
Publications
- “Short Squeeze’ Class Actions Face Uphill Battle,” Law360, February 2021, co-author
- “Could the SEC Use Dealer Registration Requirements to Target Investors in PIPE Transactions?” Hedge Fund Law Report, November 5, 2020, co-author
- “Defending Against COVID-19 Tuition Refund Class Actions,” Law360, June 8, 2020, co-author
- “9th Circ. Denials Sustain Consumer Arbitration Hurdles,” Law360, April 27, 2020, co-author
- “After Oral Argument in ‘Liu’ Case, SCOTUS Poised to Curtail SEC’s Broad Use of Disgorgement,” The Recorder, March 5, 2020, co-author