Roth v. Armistice Capital, LLC

Court of Appeals for the Second Circuit·Decided August 28, 2025·No. 24-950·Published

Opinion

24-950 Roth v. Armistice Capital, LLC

In the

United States Court of Appeals For the Second Circuit

August Term 2024

No. 24-950

ANDREW E. ROTH,

Plaintiff-Appellant,

v.

ARMISTICE CAPITAL, LLC, ARMISTICE CAPITAL MASTER FUND LTD., STEPHEN J. BOYD

Defendants-Appellees,

VAXART, INC.,

Nominal Defendant-Appellee.

Appeal from the United States District Court for the Southern District of New York No. 1:20-cv-08872, Jennifer L. Rochon, District Judge, Presiding.

(Argued March 19, 2025; Decided August 28, 2025)

Before: PARKER, ROBINSON, and PÉREZ, Circuit Judges.

Plaintiff-Appellant Andrew E. Roth sued Defendants-Appellees in the Southern District of New York, claiming that they engaged in a short-swing transaction in violation of Section 16(b) of the Securities Exchange Act. Appellees Armistice Capital, LLC and Armistice Capital Master Fund Ltd. (collectively “Armistice”) are an investment manager and its client fund that owned shares in Nominal Defendant Vaxart, Inc., a company that sought to develop an oral COVID-19 vaccine. Appellee Stephen J. Boyd was an officer of Armistice and a member of the board of directors of Vaxart.

Armistice held warrants to purchase common stock in Vaxart. On June 26, 2020, Vaxart announced that its oral COVID-19 vaccine had been selected to participate in a study sponsored by the federal government. Following this announcement, Armistice exercised the warrants and sold Vaxart shares, realizing an $87 million profit. Roth, technically suing on behalf of Vaxart, seeks disgorgement of the profit back to the corporation, contending that the sale constituted a short-swing transaction in violation of Section 16(b) of the Securities Exchange Act. That provision prohibits insiders (such as Armistice and Boyd) from purchasing and selling an issuer’s stock within a six-month period.

Appellees moved for summary judgment, arguing that the sale did not violate Section 16(b) and that, in any event, they were expressly exempt from liability under SEC Rule 16b-3(d) because the sale had been approved by Vaxart’s board of directors. The District Court granted the motion, reasoning that even if Appellees violated Section 16(b), they were shielded from liability under SEC Rule 16b-3(d) because the Vaxart board approved the transaction with knowledge of all material facts. We agree with the District Court and we AFFIRM the judgment.

GLENN F. OSTRAGER, JOSHUA S. BROITMAN, and STEVEN W.

ZOFFER, Ostrager Chong Flaherty & Broitman P.C., New York, NY, for Plaintiff-Appellant.

JAMES E. TYSSE, DOUGLAS A. RAPPAPORT, KAITLIN D. SHAPIRO, and MICHAEL CHEN, Akin Gump Strauss Hauer & Feld LLP, New York, NY, for Defendants-Appellees.

BARRINGTON D. PARKER, Circuit Judge:

Plaintiff-Appellant Andrew E. Roth sued Defendants-Appellees in the Southern District of New York, claiming that they engaged in an insider securities transaction that violated Section 16(b) of the Securities Exchange Act. 15 U.S.C. § 78p(b). Defendants-Appellees Armistice Capital, LLC and Armistice Capital Master Fund Ltd. (collectively “Armistice”) are respectively an investment manager and its client investment fund that owned shares of Nominal Defendant- Appellee Vaxart, Inc., a company that sought to develop an oral COVID-19 vaccine. Defendant-Appellee Stephen J. Boyd is the Chief Investment Officer of Armistice Capital and served on the board of Vaxart. Non-party Keith Maher similarly served in Armistice management and on the board of Vaxart. Roth was a shareholder in Vaxart.

Armistice held two sets of warrants to purchase common stock in Vaxart.

Both warrants contained provisions limiting the total equity Armistice could own in Vaxart to 4.99% and 9.99% (so-called “blocker provisions”). Boyd then petitioned the Vaxart board to amend the warrants to permit Armistice to own up to 19.99% in Vaxart stock. The Vaxart board unanimously voted to amend the warrants to adopt this change. Then, on June 26, 2020, Vaxart announced that its

oral COVID-19 vaccine had been selected to participate in a non-human-primate challenge study sponsored by the federal government. Following this announcement, Armistice exercised the warrants, obtained additional shares, and then liquidated its position in Vaxart, allegedly realizing an $87 million profit.

In this lawsuit, Roth seeks disgorgement of the $87 million profit back to Vaxart, contending that Appellees violated Section 16(b) of the Securities Exchange Act. That provision requires insiders (such as Armistice and Boyd) to disgorge profits back to an issuing corporation after purchasing and selling that issuer’s stock within a six-month period (a so-called “short-swing” transaction). Roth contends that amending the warrants to permit Armistice to own 19.99% of Vaxart’s shares, followed by Armistice’s exercise of the warrants and ensuing sale of its Vaxart stock, constituted an illegal short-swing transaction that violated Section 16(b).

Following discovery, Appellees moved for summary judgment, arguing that even if they were insiders who engaged in a short-swing transaction, they were expressly exempt from liability under Securities and Exchange Commission (SEC) Rule 16b-3(d). That Rule shields insider traders from liability if, as occurred here, the defendant purchased equity securities directly from the issuer, and the

issuer’s board approved the insider short-swing transaction in advance. The District Court agreed that Rule 16b-3(d) precluded liability, reasoning that Vaxart’s board was fully aware that Appellees were insiders and unanimously approved of the warrant amendments to increase Armistice’s equity cap. We agree and AFFIRM the judgment of the District Court.

BACKGROUND

I. Factual Background 1 Appellee Armistice Capital is an investment manager. Appellee Stephen J.

Boyd is the founder, Managing Member, and Chief Investment Officer of Armistice Capital. Non-party Dr. Keith Maher serves as a Managing Director of Armistice Capital. Armistice Capital manages investments for its client, the Master Fund. The Master Fund is an investment vehicle which holds funds from multiple investors in a single pooled account. Boyd serves as a member of the Master Fund’s board.

Nominal Appellee Vaxart is a publicly traded biotech company that seeks to develop COVID-19 vaccines administered through tablets, as opposed to

1 Background facts in this opinion are drawn from the summary judgment record and—except where noted—are either admitted, not in genuine dispute, or viewed in the light most favorable to Roth. See Delaney v. Bank of America Corp., 766 F.3d 163, 167 (2d Cir. 2014).

injections. Armistice invested in Vaxart in 2019 and, at one time, held over half of Vaxart’s outstanding common shares.

In addition to acquiring Vaxart common shares, Armistice also acquired two series of warrants in April 2019 and September 2019 that gave Armistice the right to buy additional Vaxart shares. Each of these warrants included a “blocker provision”—a limitation on the total shares that Armistice was permitted to hold. Under the relevant blocker provisions, Armistice could exercise its warrants and receive shares only to the extent that Armistice’s total holdings following the exercise would not exceed 4.99% or 9.99% of Vaxart’s outstanding shares, depending on the warrant. If Armistice exercised the April 2019 warrants, the 4.99% limitation would apply, and if it exercised the September 2019 warrants, the 9.99% provision would apply.

After Armistice had acquired its stake in Vaxart, Boyd requested changes to Vaxart’s board of directors, specifically asking to replace two Vaxart directors with Armistice-affiliated directors and by adding two seats to the Board to be filled by independent directors of Armistice’s choice. The parties sharply dispute whether Boyd’s request was in a personal capacity or on behalf of Armistice, but there is no dispute that Vaxart ultimately granted Boyd’s request.

Free access — add to your briefcase to read the full text and ask questions with AI

Roth v. Armistice Capital, LLC, (2d Cir. 2025).

Roth v. Armistice Capital, LLC (Roth v. Armistice Capital, LLC) — published by Counsel Stack Legal Research, free access to 12M+ legal documents.

Related

Kern County Land Co. v. Occidental Petroleum Corp.
411 U.S. 582 (Supreme Court, 1973)
Anderson v. Liberty Lobby, Inc.
477 U.S. 242 (Supreme Court, 1986)
Credit Suisse Securities (Usa) LLC v. Simmonds
132 S. Ct. 1414 (Supreme Court, 2012)
Roth Ex Rel. Beacon Power Corp. v. Perseus, LLC
522 F.3d 242 (Second Circuit, 2008)
John Delaney v. Bank of America Corp.
766 F.3d 163 (Second Circuit, 2014)
Rubenstein v. Int'l Value Advisers, LLC
959 F.3d 541 (Second Circuit, 2020)
Horn v. Medical Marijuana, Inc.
80 F.4th 130 (Second Circuit, 2023)