Employees' Retirement System of the City of Baton v. Macrogenics, Inc.

61 F.4th 369
CourtCourt of Appeals for the Fourth Circuit
DecidedMarch 2, 2023
Docket21-2238
StatusPublished
Cited by8 cases

This text of 61 F.4th 369 (Employees' Retirement System of the City of Baton v. Macrogenics, Inc.) is published on Counsel Stack Legal Research, covering Court of Appeals for the Fourth Circuit primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Employees' Retirement System of the City of Baton v. Macrogenics, Inc., 61 F.4th 369 (4th Cir. 2023).

Opinion

USCA4 Appeal: 21-2238 Doc: 48 Filed: 03/02/2023 Pg: 1 of 38

PUBLISHED

UNITED STATES COURT OF APPEALS FOR THE FOURTH CIRCUIT

No. 21-2238

EMPLOYEES’ RETIREMENT SYSTEM OF THE CITY OF BATON ROUGE AND PARISH OF EAST BATON ROUGE,

Plaintiff - Appellant,

and

TODD HILL,

Plaintiff.

v.

MACROGENICS, INC.; SCOTT KOENIG; JAMES KARRELS,

Defendants - Appellees.

Appeal from the United States District Court for the District of Maryland, at Greenbelt. George Jarrod Hazel, District Judge. (8:19-cv-02713-GJH)

Argued: December 6, 2022 Decided: March 2, 2023

Before GREGORY, Chief Judge, WILKINSON, Circuit Judge, and John A. GIBNEY, Jr., Senior United States District Judge for the Eastern District of Virginia, sitting by designation.

Affirmed by published opinion. Chief Judge Gregory wrote the opinion, in which Judge Wilkinson and Judge Gibney joined. USCA4 Appeal: 21-2238 Doc: 48 Filed: 03/02/2023 Pg: 2 of 38

ARGUED: William C. Fredericks, SCOTT+SCOTT ATTORNEYS AT LAW LLP, New York, New York, for Appellant. Nina Fran Locker, WILSON SONSINI GOODRICH & ROSATI, P.C., Palo Alto, California, for Appellees. ON BRIEF: Thomas L. Laughlin, IV, Donald A. Broggi, Rihana L. Swartz, New York, New York, Jacob B. Lieberman, SCOTT+SCOTT ATTORNEYS AT LAW LLP, Colchester, Connecticut; Steven J. Toll, Jan E. Messerschmidt, COHEN MILSTEIN SELLERS & TOLL PLLC, Washington, D.C., for Appellant. Jeremy W. Gagas, Wilmington, Delaware, Laurie B. Smilan, Steffan N. Johnson, John B. Kenney, WILSON SONSINI GOODRICH & ROSATI, P.C, Washington, D.C., for Appellees.

2 USCA4 Appeal: 21-2238 Doc: 48 Filed: 03/02/2023 Pg: 3 of 38

GREGORY, Chief Judge:

In this securities class action suit, the Employees’ Retirement System of the City of

Baton Rouge and Parish of East Baton Rouge represents the class of persons and entities

who acquired shares of common stock in MacroGenics, Inc. (“MacroGenics”) between

February 6, 2019 and June 4, 2019 (the “Class Period”). Plaintiffs initiated this action against

MacroGenics, its president and CEO—Scott Koenig , and its senior vice president and

CFO—James Karrels, (collectively “Defendants”) for alleged violations of sections 10(b)

and 20(a) of the Securities Exchange Act of 1934, Securities and Exchange Commission

(“SEC”) Rule 10b–5, and sections 11, 12(a), and 15 of the Securities Act of 1933.

In their Amended Complaint, Plaintiffs alleged that after purchasing MacroGenics’

stock, they experienced economic harm proximately caused by Defendants’ material

misrepresentations, misleading statements, or omissions concerning MacroGenics’ clinical

trial drug, Margetuximab. The district court granted Defendants’ motion to dismiss after

concluding that Plaintiffs had failed to sufficiently allege any actionable misrepresentations

or omissions that would give rise to Defendants’ duty to disclose, and that most of

Defendants’ statements were also immunized from suit. This appeal followed.

Finding the district court’s analysis persuasive, we affirm.

I.

A.

MacroGenics is a public, clinical-stage biopharmaceutical company that trades

under the ticker symbol “MGNX.” Striving to advance new and improved treatments, the

3 USCA4 Appeal: 21-2238 Doc: 48 Filed: 03/02/2023 Pg: 4 of 38

company developed Margetuximab, an antibody treatment for patients with metastatic

breast cancer. MacroGenics designed Margetuximab to target the HER2 oncoprotein,

which is found on the surface of some cancer cells and causes tumors to grow. The HER2

oncoprotein is often associated with an aggressive form of the disease and a poor prognosis

for patients. Margetuximab was the company’s first treatment to progress to the crucial

Phase 3 clinical trial, named “SOPHIA.” The SOPHIA clinical trial was intended to

compare how Margetuximab (in addition to chemotherapy) performed against the current

standard-of-care therapeutic antigen, Trastuzumab (in addition to chemotherapy) in HER2-

positive metastatic breast cancer patients who had previously undergone anti-HER2-

targeted therapy treatments.

SOPHIA’s clinical trial required two primary “endpoints,” which are pre-determined

key measures of the study’s success. SOPHIA’s two endpoints were: (1) prolongation of the

progression free survival (“PFS”) and (2) prolongation of the overall survival (“OS”) of

patients. PFS evaluates “how long patients enrolled in a given treatment arm of a clinical

trial continue to survive, post-enrollment, without progression of the disease.” J.A. 17. In

other words, it tracks how many months “during and after the treatment of . . . breast

cancer[] that a patient survives with the disease without the disease getting worse.” J.A.

26. OS, on the other hand, measures “how long such patients survive for any reason and

without regard to whether they experienced any post-enrollment progression of their

disease[].” J.A. 17. More specifically, its focus is on “the length of time from either the

date of diagnosis or the start of treatment for . . . breast cancer[] that patients diagnosed

with the disease are still alive.” J.A. 26. Beginning in 2016, SOPHIA enrolled 536

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patients—i.e., the intent-to-treat (“ITT”) population—who were divided into two arms of

the trial: (1) Margetuximab with chemotherapy or (2) Trastuzumab with chemotherapy.

MacroGenics’ primary objective “was to . . . show that the Margetuximab-based treatment

delivered meaningfully superior PFS and OS results compared to the Trastuzumab-based

treatment.” J.A. 26.

In a February 6, 2019 press release (the “February 6 Press Release”), which was

published prior to the market’s opening, MacroGenics revealed that, as of October 10,

2018, SOPHIA had reached its first PFS-related endpoint (having hit 265 PFS events 1) and

stated that:

The SOPHIA clinical trial met the primary endpoint of prolongation of progression-free survival (PFS) in patients treated with the combination of margetuximab plus chemotherapy compared to trastuzumab plus chemotherapy.

Patients in the margetuximab arm experienced a 24% risk reduction in PFS compared to patients in the trastuzumab arm (HR=0.76, p=0.033). Notably, approximately 85% of patients in the study were carriers of the CD16A (FcγRIIIa) 158F allele, which has been previously associated with diminished clinical response to HERCEPTIN [the trade name for Trastuzumab] and other antibodies. In this pre-specified subpopulation, patients in the margetuximab arm experienced a 32% risk reduction in PFS compared to patients in the trastuzumab arm (HR=0.68, p=0.005). Results of the SOPHIA study are being prepared for submission for publication and presentation later this year at a major scientific conference. Follow-up for determination of the impact of therapy on the sequential primary endpoint of overall survival (OS) is ongoing, as pre-specified in the study protocol and recommended by the trial’s independent Data Safety Monitoring Committee ....

“We are pleased with the SOPHIA clinical results . . .” said Scott Koenig . . . “Our Fc-engineered, immune-enhanced molecule has demonstrated a

1 Post-enrollment in the SOPHIA trial, the PFS endpoint will be satisfied when 265 patients—or events—will survive without progression of their metastatic breast cancer. Whereas the OS endpoint will be fulfilled when 385 patients—or events—will, inevitably, pass away. 5 USCA4 Appeal: 21-2238 Doc: 48 Filed: 03/02/2023 Pg: 6 of 38

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