On May 7, 2024 Rigel Pharmaceuticals, Inc. reported financial results for the first quarter ended March 31, 2024, including sales of TAVALISSE (fostamatinib disodium hexahydrate) tablets for the treatment of adults with chronic immune thrombocytopenia (ITP) who have had an insufficient response to a previous treatment and sales of REZLIDHIA (olutasidenib) capsules for the treatment of adult patients with relapsed or refractory (R/R) acute myeloid leukemia (AML) with a susceptible isocitrate dehydrogenase-1 (IDH1) mutation as detected by an FDA-approved test (Press release, Rigel, MAY 7, 2024, View Source [SID1234642797]).

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"Results for the first quarter of 2024 continued to demonstrate strong commercial demand with the highest number of TAVALISSE and REZLIDHIA bottles sold in a quarter since launch. We are also excited about the recent acquisition of GAVRETO and are on track to include this product in our commercial portfolio in July of this year," said Raul Rodriguez, Rigel’s president and CEO. "At the same time, we are progressing the development of olutasidenib with our strategic collaborators, MD Anderson and CONNECT, and driving forward our other pipeline programs."

Business Update

In the first quarter of 2024, a total of 2,193 TAVALISSE bottles were sold in the U.S. driven by 2,483 bottles shipped to patients and clinics, the highest number in a quarter since launch. Bottles remaining in distribution channels decreased by 290 bottles during the quarter.
In the first quarter of 2024, a total of 390 REZLIDHIA bottles were sold in the U.S., significantly accelerating sales growth over last year. This growth was driven by increased demand, with 326 bottles shipped to patients and clinics.
In April 2024, Rigel announced a peer-reviewed publication in Leukemia & Lymphoma on data from an analysis of the Phase 2 study evaluating REZLIDHIA in patients with mIDH1 AML who were R/R to prior venetoclax-based regimens. The findings from these analyses suggest that REZLIDHIA may provide an effective treatment for patients with recurrent AML following venetoclax combination therapy. REZLIDHIA induced durable remissions consistent with those observed in the pivotal trial and had a favorable tolerability profile.
In March 2024, Rigel appointed Lisa Rojkjaer, M.D. as Executive Vice President and Chief Medical Officer. Dr. Rojkjaer is an industry veteran with over 20 years of clinical development, regulatory, and medical affairs experience with a focus on hematology and oncology. She is a board-certified hematologist with an international clinical practice background.
In February 2024, Rigel announced the acquisition of the U.S. rights to GAVRETO (pralsetinib). GAVRETO is a once daily, small molecule, oral, kinase inhibitor of wild-type RET (rearranged during transfection) and oncogenic RET fusions. GAVRETO is approved by the U.S. Food and Drug Administration (FDA) for the treatment of adult patients with metastatic RET fusion-positive non-small cell lung cancer (NSCLC) and advanced or metastatic thyroid cancer. The acquisition of this product further expands Rigel’s portfolio and leverages Rigel’s existing infrastructure in both the institutional and community settings. Rigel expects to complete the transition of the asset and start recognizing product sales in July 2024.
In January 2024, Rigel and CONNECT announced a strategic development collaboration to evaluate REZLIDHIA (olutasidenib) in combination with temozolomide in patients with high-grade glioma (HGG) harboring an IDH1 mutation. Under the collaboration, CONNECT will include olutasidenib in CONNECT’s TarGeT-D, a molecularly guided Phase 2 umbrella clinical trial for HGG. In the Rigel-sponsored arm, adolescents and young adult patients (≤39 years old) with newly diagnosed IDH1-mutation positive HGG will receive maintenance therapy with olutasidenib in combination with temozolomide for the first year after radiotherapy, followed by olutasidenib monotherapy for the second year. Rigel will provide CONNECT funding up to $3 million and study material over the four-year collaboration.
Rigel continues to advance its Phase 1b clinical trial evaluating the safety, tolerability, pharmacokinetics, and preliminary efficacy of R2891, a novel and selective IRAK1/4 inhibitor, in patients with relapsed/refractory lower-risk myelodysplastic syndrome (LR-MDS). Enrollment in the third cohort of the trial has been completed and the company is planning to include two additional cohorts with twice daily dosing regimens. Preliminary data are expected by the end of 2024.
Financial Update
For the first quarter of 2024, total revenues were $29.5 million, consisting of $21.1 million in TAVALISSE net product sales, $4.9 million in REZLIDHIA net product sales, and $3.5 million in contract revenue from collaborations. Although TAVALISSE bottles shipped to patients and clinics reached the highest quarterly number of bottles since launch, net product sales were $21.1 million compared to $22.3 million in the same period of 2023, primarily due to a decrease in the number of bottles remaining in distribution channels. REZLIDHIA net product sales were $4.9 million compared to $1.5 million in the same period of 2023. Contract revenue from collaborations consisted of $2.3 million from Kissei Pharmaceutical Co., Ltd. related to delivery of drug supplies, $1.1 million from Grifols S.A. related to earned royalties, and $0.1 million from Medison Pharma Trading AG related to delivery of drug supplies and earned royalties.

For the first quarter of 2024, total costs and expenses were $36.5 million compared to $38.8 million for the same period of 2023. The decrease in costs and expenses was partly due to decreased research and development costs due to the timing of clinical trial activities related to the IRAK 1/4 inhibitor program, as well as the timing of trial completion activities related to two Phase 3 clinical trials of fostamatinib in patients with COVID-19 and wAIHA. In addition, the decrease was due to lower consulting and third-party services as well as lower facility-related costs. These decreases were partially offset by higher stock-based compensation expenses, mainly from performance-based awards.

For the first quarter of 2024, Rigel reported a net loss of $8.2 million, or $0.05 per basic and diluted share, compared to a net loss of $13.5 million, or $0.08 per basic and diluted share, for the same period of 2023.

As of March 31, 2024, Rigel had cash, cash equivalents and short-term investments of $49.6 million, compared to $56.9 million as of December 31, 2023. In April 2024, Rigel entered into an amendment to the Credit Agreement with MidCap Financial Trust. As part of the amendment, Rigel extended the maturity date and interest only period by one year.

Conference Call and Webcast with Slides Today at 4:30pm Eastern Time
Rigel will hold a live conference call and webcast today at 4:30pm Eastern Time (1:30pm Pacific Time).

Participants can access the live conference call by dialing (877) 407-3088 (domestic) or (201) 389-0927 (international). The conference call will also be webcast live and can be accessed from the Investor Relations section of the company’s website at www.rigel.com. The webcast will be archived and available for replay after the call via the Rigel website.