Compass Therapeutics Reports Third Quarter 2023 Financial Results and Provides Corporate Update

• Opened 29 clinical sites and continue to enroll patients in COMPANION-002, a U.S. Phase 2/3 study of CTX-009 in combination with Paclitaxel in patients with advanced biliary tract cancers (BTC); top line data from this study is expected in the second half of 2024
• Continue to enroll and follow patients in COMPANION-003, a U.S. Phase 2 study of CTX-009 (DLL4 /VEGF-A bispecific antibody) in patients with advanced colorectal cancer (CRC); initial data from this study is expected before the end of the year
• Received IND clearance for CTX-8371, a next generation bispecific checkpoint inhibitor that simultaneously targets PD-1 and PD-L1; anticipate initiating a first-in-human clinical study in the fourth quarter of 2023
• Announces a CEO succession plan; Vered Bisker-Leib, PhD, Compass President and COO, to transition to Compass Chief Executive Officer and join Compass board of directors and Thomas Schuetz, MD, PhD, Compass’ Scientific Founder and Chief Executive Officer, to transition to President of Research and Development and appointed Vice Chair of the Compass board of directors. Transition to take place on January 9^th 2024
• Ended the third quarter with $164 million in cash and marketable securities, providing cash runway for the company into 2026
  

BOSTON, Nov. 09, 2023 (GLOBE NEWSWIRE) -- Compass Therapeutics, Inc. (Nasdaq: CMPX), a clinical-stage, oncology-focused biopharmaceutical company developing proprietary antibody-based therapeutics to treat multiple human diseases, today reported third quarter and year-to-date, 2023 financial results.

“Enrollment in our Phase 2/3 study, COMPANION-002, in patients with advanced BTC has increased in the third quarter in part based on our opening of several clinical sites at large academic medical centers around the country. In addition, data are continuing to evolve in our COMPANION-003 study in patients with advanced CRC, and we expect to report initial data from this study in the fourth quarter of this year,” said Vered Bisker-Leib, PhD, President and Chief Operating Officer.

“We are very excited to announce that the FDA cleared the IND for CTX-8371, our PD-1 and PD-L1 bispecific antibody, the first StitchMabs^® generated bispecific to advance to the clinic. We believe this next generation checkpoint inhibitor with its unique mechanism-of-action may have improved activity compared with first generation checkpoint blockers in a range of solid tumors. We look forward to initiating a first-in-human clinical study prior to the end of the year,” said Thomas J. Schuetz, MD, PhD, Co-Founder and Chief Executive Officer.

Carl Gordon, Chairman of Compass’ Board of Directors, “Vered is a seasoned biotech executive who has played a key role in building our pipeline and operations, and she is well positioned to lead Compass through this next phase of strategic growth. Additionally, Tom’s expertise and leadership as President of Research and Development will be invaluable as we continue to deliver on our mission of advancing next generation antibodies into transformative cancer therapies. Both Vered and Tom’s commitment to Compass over the past decade have been instrumental in the value creation of the company, and I look forward to continuing our work together.”

Development Pipeline Update and Highlights:

CTX-009 (DLL4 and VEGF-A bispecific antibody)

• Enrolling patients in a U.S. Phase 2 study of CTX-009 as a monotherapy in patients with advanced, metastatic CRC (COMPANION-003)
  • The study design is an Adaptive Simon Two-Stage, with Stage 1 of the study enrolling 37 patients; if 3 or more responses are confirmed in Stage 1, the study will advance to Stage 2, and an additional 47 patients will be enrolled 
  • The study is enrolling patients with CRC who have received two or three prior systemic therapies irrespective of their KRAS mutation status  
  • Patients are being evaluated for safety and tolerability, as well as clinical response
  • Initial results from Stage 1 of this study are expected in the fourth quarter of 2023
• Enrolling patients in a U.S. Phase 2/3 study of CTX-009 in combination with Paclitaxel in BTC (COMPANION-002)
  • This randomized Phase 2/3 study is designed to enroll 150 patients with BTC who have received one prior systemic therapy
  • The primary endpoint of the study is overall response rate (ORR), and secondary endpoints include progression free survival (PFS), overall survival (OS), clinical benefit rate (CBR) and duration of response (DOR)
  • Enrollment in the third quarter has increased relative to the first half of 2023 in part due to the opening of several clinical sites at large academic medical centers across the country
  • Top line data is expected from this study in the second half of 2024  

CTX-471 (CD137 + PD-1)

• This Phase 1 study is assessing the safety and activity of the combination of CTX-471 (CD137 agonistic antibody) and Merck’s anti-PD-1 therapy KEYTRUDA® (pembrolizumab) in patients with select solid tumors
• The dose-escalation portion of the study (n=9) has been completed with no dose limiting toxicities observed
• The cohort expansion phase of the trial is expected to begin in in the first quarter of 2024 
  

CTX-8371 (PD-1 x PD-L1)

• CTX-8371 is a next generation bispecific checkpoint inhibitor that simultaneously targets PD-1 and PD-L1 and exhibits a unique mechanism-of-action that involves cleavage of cell surface PD-1
• FDA cleared the IND for CTX-8371 and we expect to initiate a Phase 1 clinical trial in the fourth quarter of 2023

Financial Results

Net loss for the third quarter ended September 30, 2023 was $10.0 million or $0.08 per common share, compared to $12.0 million or $0.12 per common share for the same period in 2022. Net loss for the nine months ended September 30, 2023 was $29.1 million or $0.23 per common share, compared to $27.6 million or $0.27 per common share for the same period in 2022.

Cash Position

As of September 30, 2023, cash and marketable securities were $164 million as compared to $187 million as of December 31, 2022, providing the Company with an anticipated cash runway into 2026. During the first nine months of 2023, the Company used $28 million of cash to fund operations.

Research and development (R&D) Expenses

R&D expenses were $8.8 million for the quarter ended September 30, 2023, as compared to $9.8 million for the same period in 2022, a decrease of approximately $1.0 million or 10%. The decrease was primarily attributable to lower manufacturing expense related to CTX-009 of $1.6M.

R&D expenses were $25.7 million for the nine months ended September 30, 2023, as compared to $20.1 million for the same period in 2022, an increase of $5.6 million or 28%. The increase was primarily attributable to higher clinical costs of $3.8 million and higher manufacturing costs of $1.1 million.

General and Administrative (G&A) Expenses

G&A expenses were $3.1 million for the quarter ended September 30, 2023, as compared to $2.8 million for the same period in 2022, an increase of $0.3 million or 10%. The increase was primarily attributable to higher stock compensation expense of $0.3 million. G&A expenses were $9.3 million for the nine months ended September 30, 2023, as compared to $8.7 million for the same period in 2022, an increase of $0.6 million or 7%. The increase was primarily attributable to higher stock compensation expense of $0.5 million.

Upcoming Investor Conferences

Compass management will participate in two upcoming investor conferences:

• Stifel Healthcare Conference
  Date: November 14-15, 2023
  Location: New York, NY

• Jefferies London Healthcare Conference
  Date: November 14-16, 2023
  Location: London, UK

Live webcasts presentations, when available, will be under “News & Events” in the Investors section of the Company’s website located at www.compasstherapeutics.com.

KEYTRUDA® is a registered trademark of Merck Sharp & Dohme LLC, a subsidiary of Merck & Co., Inc., Rahway, NJ, USA. 

About Compass Therapeutics

Compass Therapeutics, Inc. is a clinical-stage oncology-focused biopharmaceutical company developing proprietary antibody-based therapeutics to treat multiple human diseases. Compass’s scientific focus is on the relationship between angiogenesis, the immune system, and tumor growth. The company pipeline of novel product candidates is designed to target multiple critical biological pathways required for an effective anti-tumor response. These include modulation of the microvasculature via angiogenesis-targeted agents, induction of a potent immune response via activators on effector cells in the tumor microenvironment, and alleviation of immunosuppressive mechanisms used by tumors to evade immune surveillance. Compass plans to advance its product candidates through clinical development as both standalone therapies and in combination with proprietary pipeline antibodies based on supportive clinical and nonclinical data. The company was founded in 2014 and is headquartered in Boston, Massachusetts. For more information, visit the Compass Therapeutics website at https://www.compasstherapeutics.com

Forward-Looking Statements

This press release contains forward-looking statements. Statements in this press release that are not purely historical are forward-looking statements. Such forward-looking statements include, among other things, references to Compass’s financial position to continue advancing its product candidates, expectations about cash runway, business and development plans, and statements regarding Compass’s product candidates, their development, regulatory plans with respect thereto and therapeutic potential thereof. Actual results could differ from those projected in any forward-looking statements due to numerous factors. Such factors include, among others, Compass’s ability to raise the additional funding it will need to continue to pursue its business and product development plans, the inherent uncertainties associated with developing product candidates and operating as a development stage company, Compass’s ability to identify additional product candidates for development, Compass’s ability to develop, complete clinical trials for, obtain approvals for and commercialize any of its product candidates, competition in the industry in which Compass operates and market conditions. These forward-looking statements are made as of the date of this press release, and Compass assumes no obligation to update the forward-looking statements, or to update the reasons why actual results could differ from those projected in the forward-looking statements, except as required by law. Investors should consult all of the information set forth herein and should also refer to the risk factor disclosure set forth in the reports and other documents Compass files with the SEC available at www.sec.gov, including without limitation Compass’s latest Form 10-Q and subsequent filings with the SEC.

Investor Contact
ir@compasstherapeutics.com

Media Contact
Anna Gifford, Communications Manager
media@compasstherapeutics.com
617-500-8099

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