In re Stemline Therapeutics, Inc. Sec. Litig.

313 F. Supp. 3d 543
CourtDistrict Court, S.D. Illinois
DecidedMarch 15, 2018
Docket17 Civ. 832 (PAC)
StatusPublished
Cited by2 cases

This text of 313 F. Supp. 3d 543 (In re Stemline Therapeutics, Inc. Sec. Litig.) is published on Counsel Stack Legal Research, covering District Court, S.D. Illinois primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
In re Stemline Therapeutics, Inc. Sec. Litig., 313 F. Supp. 3d 543 (S.D. Ill. 2018).

Opinion

HONORABLE PAUL A. CROTTY, United States District Judge:

This is a securities case brought by buyers of stock in Stemline Therapeutics, Inc. ("Stemline"), which develops a highly sophisticated and complicated drug for the treatment of an otherwise fatal blood cancer. The buyers contend they were misled by Stemline's claimed ability to remediate certain fatal side effects of its drug.

Lead Plaintiffs Adam Ludlow, Daljit Singh, and Kenneth Walsh, and Representative Plaintiff Marion Beeler ("Plaintiffs") bring this consolidated class action1 against Stemline, its officers and directors, *545Ivan Bergstein, Ron Bentsur, Eric L. Dobmeier, Alan Forman, David Gionco, Kenneth Zuerblis ("Individual Defendants"), and its underwriter, Jefferies LLC ("Jefferies"), alleging violations of: Sections 10(b) and 20(a) of the Exchange Act (Counts I, II); and Sections 11, 12(a)(2), and 15 of the Securities Act (Counts III-V). Plaintiffs, who allegedly purchased Stemline securities (1) pursuant and/or traceable to Stemline's secondary public offering on or about January 20, 2017 ("Offering") and/or (2) on the open market between January 20, 2017 and February 1, 2017 ("Class Period"), claim that they suffered injury from Stemline's misleading statements in the Offering's prospectus concerning its ability to remediate side effects of the drug under development.

Stemline, Individual Defendants, and Jefferies move to dismiss the Amended Complaint. ECF 42, 45. For reasons set forth below, the motion to dismiss is GRANTED .

BACKGROUND

I. Development of SL-401

Stemline is a clinical stage biopharmaceutical company that acquires, develops, and commercializes proprietary oncology therapeutics. Its leading drug candidate and key value driver is SL-401. Amended Complaint ("AC"), ¶¶ 14, 30. SL-401 treats certain rare, blood-related and otherwise fatal cancers, including blastic plasmacytoid dendritic cell neoplasm ("BPDCN") and acute myeloid leukemia ("AML"), Id. ¶¶ 2, 30.

Stemline began its clinical development program for SL-401 in July 2014, Upon achieving initial success, it broadened the trial into a pivotal trial with a plan to enroll at least 60 patients. Id. ¶ 36. The pivotal trial opened with a lead-in phase to evaluate the dosage and safety. Id. ¶¶ 25, 36. The lead-in phase was followed by an expansion phase to determine whether the SL-401 drug treatment was efficacious against the blood cancer. Id. ¶¶ 25, 42. The lead-in phase was completed on June 30, 2015, and the expansion phase began thereafter, with the goal of submitting a marketing application to the Food and Drug Administration ("FDA") during the second half of 2017. Id. ¶¶ 37, 42.

On December 7, 2015, Stemline reported on the clinical data of 29 patients treated with SL-401 during the lead-in phase and the on-going expansion phase. Id. ¶¶ 37, 39, 40; ECF 43-6 at 9. Three of the treated patients had contracted severe capillary leak syndrome ("CLS")2 , a now-known side effect of SL-401, two of whom had died from it and one of whom had experienced a life-threatening emergency. AC ¶ 40. Stemline implemented a safety and dosage protocol to minimize the risk of CLS. The trial continued and no additional case of severe CLS was observed until January 2017. Id. ¶¶ 41, 48.

As the expansion phase continued, in August 2016, the FDA granted the Breakthrough Therapy Designation ("BTD") status to SL-401 because the drug demonstrated substantial improvements over existing therapies: during the BPDCN trial, it demonstrated high overall response rates, with multiple complete responses.

*546Id. ¶¶ 29, 35, 45. Notably, the FDA granted the BTD status despite the fact that the side effect of SL-401 had caused two deaths and one life-threatening emergency. See id. ¶¶ 40, 45. The BTD status provided for additional FDA guidance and a higher priority in the FDA's review and approval process. Id. ¶ 46.

On January 6, 2017, Stemline announced that it had entered into an agreement with the FDA on the registration pathway of SL-401 for the treatment of BPDCN, and would be enrolling an additional cohort of BPDCN patients in the ongoing pivotal trial to support the filing of a Biologies License Application for full approval of SL-401. Id. ¶ 47.

II. Safety Measure Failure

On or about January 14, 2017, one BPDCN patient enrolled in the pivotal trial developed a serious side effect, after receiving two of the five treatment cycles of SL-401 that began on January 13, 2017. In accordance with the revised safety and dosage protocol, doctors ceased administering SL-401 to the patient. Id. ¶¶ 48, 73. On January 17, 2017, the patient's family reported that the patient had been "diagnosed with Capillary Leak Syndrome, which [was] a known side effect of SL-401." Id. ¶ 74. On January 18, 2017, the patient died. Id. ¶ 48. Stemline learned of the patient's death on the same day. Id. ¶ 49.

III. Secondary Public Offering and Offering Documents

On January 19, 2017, the day after the patient's death, Stemline announced the Offering of its common stock to fund the potential commercialization of SL-401. Id. ¶ 50. On January 20, 2017, Stemline filed the offering documents (Form 424B5), including the Prospectus, with the U.S. Securities and Exchange Commission ("SEC") and, on the same day, offered 4.5 million shares of Stemline common stock at $10.00 per share, totaling $45 million. Id. ¶¶ 51, 52.

The Offering's Prospectus detailed SL-401's prior and then-current trials, including the Pivotal Trial. Id. ¶ 53. The Prospectus provided facts and assessments concerning prior clinical trials by incorporating prior SEC filings by reference. See id. ¶¶ 55-64. The Prospectus also stated that "SL-401's safety profile has continued to remain predictable and manageable over increasing treatment duration, drug exposure, and patient experience," id. ¶ 65, and "favorable clinical data" have been observed as of the date of the offering documents, id. ¶ 66. The Prospectus did not disclose the patient's death that Stemline had learned on January 18, 2017. Id. ¶ 53.

IV. Public Disclosure of Patient's Death

On February 2, 2017, The Street published an article revealing that on January 17, 2017, a BPDCN patient had been diagnosed with CLS and had died the next day. Id. ¶ 67. The article included several unfounded commentaries on SL-401 and the FDA approval process. For example, the article stated that "a cancer patient in a clinical trial died from a severe side effect, a type of low blood pressure tied to the company's drug SL-401" and "[SL-401] is also now tied to three patient deaths," when the cause of the patient's death had not yet been determined. ECF 43-13 at 1, 2.

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Bluebook (online)
313 F. Supp. 3d 543, Counsel Stack Legal Research, https://law.counselstack.com/opinion/in-re-stemline-therapeutics-inc-sec-litig-ilsd-2018.