On November 7, 2017 CytomX Therapeutics, Inc. (NASDAQ: CTMX), a biopharmaceutical company developing investigational Probody therapeutics for the treatment of cancer, reported third quarter 2017 financial results (Press release, CytomX Therapeutics, NOV 7, 2017, View Source;p=RssLanding&cat=news&id=2315188 [SID1234521674]).

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As of September 30, 2017, CytomX had cash, cash equivalents and short-term investments of $331.3 million. Based upon its current operating plan, the Company expects its existing capital resources will be sufficient to fund operations into 2020.

"We have continued to enjoy a highly productive year with excellent progress in advancing our deep pipeline of potentially transformative Probody therapeutics and the addition of another major partner in Amgen," said Sean McCarthy, D.Phil., president and chief executive officer of CytomX Therapeutics. "I am delighted with the team’s strong execution across all areas of the organization, and we continue to be well positioned for initial data read outs in 2018 from our lead, wholly owned programs, CX-072 and CX-2009. We also expect that Probody therapeutics targeting CTLA-4, PD-1, and CD71 will enter the clinic next year, demonstrating the considerable momentum behind our pipeline."

Q3’17 BUSINESS HIGHLIGHTS AND RECENT DEVELOPMENTS

PROCLAIM-CX-072 (PD-L1 Probody Therapeutic) Clinical Program

Patient enrollment continued in the monotherapy dose escalation arm (Part A1) of the study evaluating CX-072 in patients with advanced unresectable solid tumors or lymphomas. Enrollment is expected to be complete by year-end.
Patient enrollment has now been initiated in all other dose escalation arms of the study:
Monotherapy expansion in patients with PD-L1-positive tumors at multiple dose levels (Part A2);
Concomitant schedule for CX-072 plus ipilimumab in patients with advanced unresectable solid tumors or lymphomas (Part B1);
Phased schedule for CX-072 plus ipilimumab in patients with advanced unresectable solid tumors or lymphomas (Part B2); and
Combination of CX-072 plus vemurafinib in patients with V600E BRAF-positive melanoma (Part C)
During the first half of 2018, an expansion cohort of the study at the recommended Phase 2 dose is expected to begin enrolling patients to evaluate CX-072 as monotherapy in a tumor type with known sensitivity to PD-L1 and/or PD-1 inhibitors (Part D).
PROCLAIM-CX-2009 (CD166 Probody Drug Conjugate) Clinical Program

CX-2009 is a first-in-class Probody drug conjugate (PDC) that targets CD166, an antigen that is broadly and highly expressed in many types of cancers, but has been considered undruggable given that it is also expressed in normal tissue.
Patient enrollment continues in the PROCLAIM-CX-2009 study, a Phase 1/2 clinical trial evaluating CX-2009 as monotherapy in a subset of CD166-positive cancers.
The study was initiated at a dose of 0.25 mg/kg, has advanced through several patient cohorts and is currently enrolling at a dose of 2 mg/kg.
Expansion cohorts at the recommended Phase 2 dose in one or more CD166 positive tumor types are expected to initiate in 2018.
CX-2029 (CD71 Probody Drug Conjugate) Preclinical Program

CytomX, in collaboration with AbbVie, is advancing CX-2029, a CD71-directed PDC, through Investigational New Drug (IND) application-enabling studies and expects to file an IND application in the first half of 2018.
A $15 million milestone payment ($14 million net of associated license fees) was received from AbbVie in conjunction with meeting certain criteria allowing the initiation of GLP toxicology studies by CytomX.
CX-188 (PD-1 Probody Therapeutic) Preclinical Program

CytomX is advancing CX-188, a PD-1-directed Probody therapeutic, through IND application-enabling studies and expects to file an IND application in the second half of 2018.
Amgen Partnership

During the quarter, Amgen and CytomX entered into a strategic collaboration in immuno-oncology in the field of Probody T-cell engaging bispecific antibodies including the co-development of a CytomX Probody T-cell engaging bispecific against the Epidermal Growth Factor Receptor (EGFR), a highly validated oncology target expressed on multiple human cancer types.
Under the terms of the agreement, Amgen and CytomX will co-develop a Probody T-cell engaging bispecific against EGFR-CD3 with CytomX leading early development. Amgen will lead later development and commercialization with global late-stage development costs shared between the two companies.
Amgen made an upfront payment of $40 million and purchased $20 million of CytomX common stock.
CytomX is eligible to receive up to $455 million in development, regulatory and commercial milestones for the EGFR program.
Amgen will lead global commercial activities with CytomX able to opt into a profit share in the U.S. and receive tiered, double-digit royalties on net product sales outside of the U.S.
Amgen also received exclusive worldwide rights to develop and commercialize up to three undisclosed targets. Should Amgen ultimately pursue all of these targets, CytomX will be eligible to receive up to $950 million in additional upfront and milestone payments and high single-digit to mid-double digit royalty payments on any resulting products.
CytomX also received the rights from Amgen to an undisclosed preclinical T-cell engaging bispecific program; Amgen is eligible to receive milestones and royalty payments on any resulting products from this CytomX program.
Bristol-Myers Squibb (BMS) Partnership

BMS continues to advance its CTLA-4-directed Probody therapeutic, which is expected to enter the clinic in early 2018.
In addition, CytomX and Bristol-Myers Squibb are evaluating a Probody version of Bristol-Myers Squibb’s CTLA-4 nonfucosylated (CLTA-4-NF) version of ipilimumab as part of the current collaboration.
Third Quarter Financial Results
Cash, cash equivalents and investments totaled $331.3 million as of September 30, 2017, compared to $181.9 million as of December 31, 2016. The increase reflects a $200 million upfront payment received from BMS in connection with the expansion of the existing collaboration.

Revenue was $24.1 million for the three months ended September 30, 2017, compared to $3.5 million for the three months ended September 30, 2016. The increase was primarily attributable to the recognition of $14.0 million, net of the associated license fees, from the milestone payment received from AbbVie as a result of the Company achieving certain milestones required to be met to begin GLP toxicology studies under the CD71 Agreement and an increase of $6.3 million related to the recognition of the an upfront payment received from BMS in connection with the expansion of our collaboration pursuant to an amendment of our Collaboration and License Agreement entered into in March 2017.

Research and development expenses were $28.9 million for the three months ended September 30, 2017, compared to $13.3 million for the corresponding period in 2016. The increase was primarily attributable to $10.7 million of in-process research and development expense recognized and a $1.2 million sublicense fee payable to UCSB as a result of the Amgen agreement, an increase of $1.7 million in pharmacology studies and clinical trial expenses resulting from the advancement of CX-072, CX- 2009 and CX-2029 in 2017, an increase of $0.9 million in allocations resulting from increases in facilities-related expenses, an increase of $0.4 million in consulting and contracted services and an increase of $0.4 million in personnel-related expense resulting from an increase in headcount.

General and administrative expenses were $6.2 million for the three months ended September 30, 2017, compared to $5 million for the corresponding period in 2016. The increase was primarily attributable to an increase of $0.3 million in personnel-related expenses due to an increase in headcount, an increase of $0.3 million in legal expenses and an increase of $0.4 million in consulting and public relations expenses.