Washington, D.C. 20549







Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 8, 2019



Calithera Biosciences, Inc.

(Exact name of registrant as specified in its charter)




Delaware   001-36644   27-2366329

(State or other jurisdiction

of incorporation)



File Number)


(IRS Employer

Identification No.)

343 Oyster Point Blvd. Suite 200

South San Francisco, California

(Address of principal executive offices)   (Zip Code)

Registrant’s telephone number, including area code: (650) 870-1000



Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:


Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)


Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)


Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))


Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:


Title of each class





Name of each exchange

on which registered

Common Stock, $0.0001 par value   CALA   The Nasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging Growth Company  ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☒




Item 2.02.

Results of Operations and Financial Condition.

On August 8, 2019, Calithera Biosciences, Inc. issued a press release announcing its financial results for the quarter ended June 30, 2019. A copy of this press release is attached hereto as Exhibit 99.1.

In accordance with General Instruction B.2 of Form 8-K, the information in this Current Report on Form 8-K, including Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, whether made before or after the date hereof, except as expressly set forth by specific reference in such filing to this Current Report on Form 8-K.


Item 9.01

Financial Statements and Exhibits.

(d) Exhibits.





99.1    Press Release, dated August 8, 2019


Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.


    Calithera Biosciences, Inc.
Dated: August 8, 2019    

/s/ Susan M. Molineaux

      Susan M. Molineaux
      President and Chief Executive Officer

Exhibit 99.1



Calithera Biosciences Reports Second Quarter 2019 Financial Results and Recent Highlights

—Calithera to Provide Corporate Update via Conference Call and Webcast at

2:00 p.m. PT on August 8, 2019—

SOUTH SAN FRANCISCO, Calif., August 8, 2019 (GLOBE NEWSWIRE) – Calithera Biosciences, Inc. (Nasdaq: CALA), a clinical stage biotechnology company focused on discovering and developing novel small molecule drugs for the treatment of cancer and other life-threatening diseases, announced today its financial results for the second quarter ended June 30, 2019. As of June 30, 2019, cash equivalents and investments totaled $153.2 million.

“In the second quarter, we achieved clinical proof of concept for our glutaminase inhibitor telaglenastat, with positive topline results of the randomized phase 2 ENTRATA study,” said Susan Molineaux, PhD, president and chief executive officer of Calithera. “After completing a secondary offering in the quarter, we are well positioned to execute on our strategy and advance our pipeline forward. In the second half of the year, we look forward to completing enrollment in our registrational CANTATA trial evaluating telaglenastat for the treatment of patients with renal cell carcinoma, as well as presenting data from our arginase inhibitor program INCB001158.”

Second Quarter 2019 and Recent Highlights



Achieved positive topline results in randomized Phase 2 ENTRATA study of telaglenastat (CB-839) with everolimus in renal cell carcinoma. The ENTRATA trial (NCT03163667) was a Phase 2 randomized, double-blind trial designed to evaluate the safety and efficacy of telaglenastat in combination with everolimus versus placebo with everolimus in patients with advanced clear cell RCC who have been treated with at least two prior lines of systemic therapy, including at least one prior VEGFR-targeted tyrosine kinase inhibitor. The trial enrolled 69 patients at multiple centers in the United States. The primary endpoint of ENTRATA was progression-free survival (PFS). The combination doubled the median PFS in heavily pretreated patients with advanced RCC. Telaglenastat, when added to everolimus, doubled the median PFS to 3.8 months as compared to 1.9 months for everolimus alone and reduced the risk of disease progression or death by 36% (HR=0.64, p=0.079 one-sided). The primary endpoint of the trial was PFS per investigator assessment with a predetermined threshold of p£0.2 one-sided. The secondary endpoint of overall survival is not yet mature.



Initiated Phase 1/2 clinical trial of telaglenastat in combination with palbociclib for solid tumors. The Phase 1/2 clinical trial is evaluating telaglenastat in combination with Pfizer’s CDK4/6 inhibitor palbociclib, also known as Ibrance®. The study will evaluate the safety and anti-tumor activity of telaglenastat plus palbociclib in patients with KRAS-mutated colorectal cancer (CRC) and KRAS-mutated non-small cell lung cancer (NSCLC).



Advanced INCB001158 arginase inhibitor immuno-oncology program. INCB001158 is being evaluated in multiple clinical trials for the treatment of patients with cancer both as a monotherapy, and in combination with immunotherapies and chemotherapy. INCB001158 is being developed as part of a collaboration and license agreement with Incyte. Data from INCB001158 are expected to be presented at the European Society for Medical Oncology (ESMO) Congress in September.



Presented new preclinical data for CB-708 at AACR Annual Meeting. CB-708 is a selective, oral inhibitor of CD73, an enzyme that synthesizes the immunosuppressive agent adenosine and is over expressed in multiple tumor types. By blocking adenosine production in the tumor, CB-708 is designed to enhance T-cell activation leading to anti-tumor activity. Calithera anticipates that CB-708 will enter clinical trials in the second half of 2019.



Completed public offering of common stock. In June 2019, Calithera completed an underwritten public offering of common stock. Gross proceeds from the offering, before underwriting discounts and commissions and offering expenses, were $57.5 million.

Selected Second Quarter 2019 Financial Results

Cash, cash equivalents and investments totaled $153.2 million at June 30, 2019.

Research and development expenses were $20.9 million for the three months ended June 30, 2019, compared with $17.3 million for the same period in the prior year. The increase of $3.6 million was primarily due to a $1.5 million increase in the telaglenastat program, including for the CANTATA trial, an increase of $1.5 million in the INCB001158 program, and an increase of $0.7 million in the CB-280 program, partially offset by a decrease of $0.1 million for investment in our early stage research programs.

General and administrative expenses were $4.0 million for the three months ended June 30, 2019, compared with $3.5 million for the same period in the prior year. The increase of $0.5 million was related to higher professional services costs.

Net loss for the three months ended June 30, 2019 was $24.2 million, or $0.58 per share.

Conference Call Information

Calithera will host an update conference call today, Thursday, August 8 at 5:00 p.m. Eastern Time/2:00 p.m. Pacific Time. The call may be accessed by dialing (855) 783-2599 (domestic) or (631) 485-4877 and referring to conference ID 9239839. To access the live audio webcast or the subsequent archived recording, visit the Investors section of the Calithera website at www.calithera.com. The webcast will be recorded and available for replay on Calithera’s website for 30 days.

About Calithera

Calithera Biosciences is a clinical-stage biopharmaceutical company pioneering the discovery and development of targeted therapies that disrupt cellular metabolic pathways to preferentially block tumor cells and enhance immune-cell activity. Driven by a commitment to rigorous science and a passion for improving the lives of people impacted by cancer and other life-threatening diseases, Calithera is advancing a pipeline of first-in-clinic, oral therapeutics to meaningfully expand treatment options available to patients. Calithera is headquartered in South San Francisco, California. For more information about Calithera, please visit www.calithera.com.

Forward Looking Statements

Statements contained in this press release regarding matters that are not historical facts are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Words such as “may,” “will,” “expect,” “anticipate,” “estimate,” “intend,” “poised” and similar expressions (as well as other words or expressions referencing future events, conditions, or circumstances) are intended to identify forward-looking statements. These statements include those related to Calithera’s clinical trials, the clinical and commercial potential of its product candidates; the trial design and enrollment of patients in the CANTATA and ENTRATA trials; clinical trials for INCB001158 and Calithera’s agreement with Incyte; and the timing that CB-708 will enter clinical trials in 2019. Because such statements are subject to risks and uncertainties, actual results may differ materially from those expressed or implied by such forward-looking statements. The potential product candidates that Calithera develops may not progress through clinical development or receive required regulatory approvals within expected timelines or at all. In addition, clinical trials may not confirm any safety, potency or other product characteristics described or assumed in this press release. Such product candidates may not be beneficial to patients or successfully commercialized. The failure to meet expectations with respect to any of the foregoing matters may have a negative effect on Calithera’s stock price. Additional information concerning these and other risk factors affecting Calithera’s business can be found in Calithera’s periodic filings with the Securities and Exchange Commission at www.sec.gov. These forward-looking statements are not guarantees of future performance and speak only as of the date hereof, and, except as required by law, Calithera disclaims any obligation to update these forward-looking statements to reflect future events or circumstances.

SOURCE: Calithera Biosciences, Inc.

Calithera Biosciences, Inc.

Selected Consolidated Statements of Operations Financial Data

(in thousands, except per share amounts)



     Three Months Ended
June 30,
    Six Months Ended
June 30,
     2019     2018     2019     2018  



Collaboration revenue

   $ —       $ 17,065     $ —       $ 22,254  













Total revenue

     —         17,065       —         22,254  

Operating expenses:


Research and development

     20,928       17,305       41,167       32,798  

General and administrative

     3,984       3,498       8,148       7,006  













Total operating expenses

     24,912       20,803       49,315       39,804  













Loss from operations

     (24,912     (3,738     (49,315     (17,550

Interest and other income, net

     760       663       1,476       1,269  













Net loss

   $ (24,152   $ (3,075   $ (47,839   $ (16,281













Net loss per share, basic and diluted

   $ (0.58   $ (0.09   $ (1.19   $ (0.45













Weighted average common shares used to compute net loss per share, basic and diluted

     41,303       35,874       40,091       35,827  













Calithera Biosciences, Inc.

Selected Consolidated Balance Sheet Financial Data

(in thousands)



     June 30,      December 31,  
     2019      2018  

Balance Sheet Data:


Cash, cash equivalents and investments

   $ 153,212      $ 136,153  

Working capital

     137,060        125,371  

Total assets

     166,376        142,725  

Total liabilities

     26,994        16,011  

Accumulated deficit

     (244,080      (196,170

Total stockholders’ equity

     139,382        126,714  



Jennifer McNealey