A Phase 1 Open-Label, Dose-Finding Study Evaluating Safety and Pharmacokinetics of FPA144 in Patients With Advanced Solid Tumors
Phase: PHASE1
Conditions: Advanced Solid Tumors, Gastric Cancer, Transitional Cell Carcinoma of the Bladder
Sponsor: Five Prime Therapeutics, Inc.

 
 
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Confidential 
 
A Phase 1 Open-Label, Dose-Finding Study 
Evaluating Safety and Pharmacokinetics of FPA144 
in Patients with Advanced Solid Tumors 
 
Protocol Number: 
FPA144-001 
Investigational Product: FPA144 
IND Number: 
117701 
Development Phase: 
Phase 1 
Indication Studied: 
Advanced Solid Tumors 
Protocol Version: 
5 – Amendment 5 
Date of Protocol: 
30 May 2017 
Supersedes: 
 
Version 4, Amendment 4, dated 29 March 2016 
Sponsor: 
Five Prime Therapeutics, Inc. 
Two Corporate Drive 
South San Francisco, CA 94080-7047 
Tel: + 1 415-365-5600  
Responsible Medical 
Officer: 
Helen L. Collins, MD 
Senior Vice President and Chief Medical Officer 
Five Prime Therapeutics, Inc. 
 
Confidential 
This document contains proprietary and confidential information of Five Prime Therapeutics, Inc. and may not be 
reproduced or disclosed in whole or in part without written authorization from Five Prime Therapeutics, Inc.  

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Protocol Approval Signature Page 
Declaration of Sponsor 
A Phase 1 Open-Label, Dose-Finding Study 
Evaluating Safety and Pharmacokinetics of FPA144 
in Patients with Advanced Solid Tumors 
The study will be conducted according to the protocol and in compliance with Good Clinical 
Practice (GCP), the Declaration of Helsinki, and other applicable regulatory requirements. 
Essential study documents will be archived in accordance with applicable regulations. 
This study protocol was subjected to critical review. The information it contains is consistent 
with current knowledge of the risks and benefits of the investigational product, as well as with 
the moral, ethical, and scientific principles governing clinical research as set out in the 
Declaration of Helsinki, 1989, and the International Conference on Harmonization (ICH) 
guidelines on GCP.  
 
 

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Declaration of the Investigator 
A Phase 1 Open-Label, Dose-Finding Study 
Evaluating Safety and Pharmacokinetics of FPA144 
in Patients with Advanced Solid Tumors 
All documentation for this study that is supplied to me and that has not been previously 
published will be kept in the strictest confidence. This documentation includes this study 
protocol, Investigator's Brochure (IB), electronic case report forms (eCRFs), and other scientific 
data. 
The study will not be commenced without the prior written approval of a properly constituted 
Institutional Review Board (IRB) or Independent Ethics Committee (IEC). No changes will be 
made to the study protocol without the prior written approval of the Sponsor and the IRB or IEC, 
except as necessary to eliminate an immediate hazard to the patients. 
I have read and understood and agree to abide by all the conditions and instructions contained in 
this protocol. 
 
 
 
 
Principal Investigator’s Signature 
 
Date 
 
 
 
Name (printed) 
 
 
 
 
 
Institution or Company Name 
 
 

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Protocol Synopsis 
Title: 
A Phase 1 Open-Label, Dose-Finding Study Evaluating Safety and 
Pharmacokinetics of FPA144 in Patients with Advanced Solid Tumors 
Protocol Number: 
FPA144-001 
Clinical Phase: 
1 
Sponsor: 
Five Prime Therapeutics, Inc. 
Study Centers: 
Up to 35 study centers  
Objectives: 
 
Primary: 
• To evaluate the safety profile of escalating doses of FPA144 in patients with 
advanced solid tumors, and to determine the MTD and RD (Part 1A only) 
• To evaluate the safety profile of escalating doses of FPA144 in patients with 
advanced gastric or gastroesophageal cancer (Part 1B only), hereinafter 
referred collectively to as ‘gastric cancer.’ 
• To evaluate the safety and tolerability of FPA144 administered 
intravenously every two weeks at the RD in patients with gastric cancer and 
other solid tumors, including transitional cell carcinoma of the genitourinary 
tract (hereinafter referred to as bladder cancer) (Part 2 only) 
 
Secondary: 
• To characterize the PK profile of single and multiple doses of intravenously 
administered FPA144 in gastric cancer patients and in other solid tumor 
patients, including bladder cancer 
• To evaluate the safety and tolerability of longer term exposure to FPA144 
administered intravenously every two weeks 
• To evaluate the objective response rate (ORR) in patients with 
FGFR2b-selected gastric cancer and other solid tumors by tumor type, 
including FGFR2b-selected bladder cancer (Part 2 only) 
• To evaluate duration of response in responding patients with 
FGFR2b-selected gastric cancer and other solid tumors by tumor type, 
including FGFR2b-selected bladder cancer (Part 2 only) 
• To characterize the pharmacodynamic profile of FPA144 through an 
analysis of the immune cell infiltrate in pre-treatment and on-treatment 
tumor biopsies  by tumor type (Part 2 only) 

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Objectives (Cont.): 
Exploratory: 
• To evaluate the stable disease rate and duration in patients with FGFR2b- 
selected gastric cancer and other solid tumors by tumor type, including 
FGFR2b-selected bladder cancer (Part 2 only) 
• To assess progression-free survival (PFS) in patients with FGFR2b-selected 
gastric cancer and other solid tumors by tumor type, including FGFR2b-
selected bladder cancer (Part 2 only) 
• To explore the association between extent of FGFR2b overexpression and 
FGFR2 amplification (or other molecular aberration, as applicable) in tumor 
tissue and clinical outcome by tumor type  
• To characterize the pharmacodynamic profile of FPA144 through an 
analysis of exploratory biomarkers in pre-treatment and on-treatment tumor 
biopsies by tumor type (Part 2 only) 
Study Design: 
This is a three-part, open-label, safety, tolerability, and PK study of FPA144. 
Patients will be enrolled into either Part 1 (A or B), or Part 2 of the study, but 
not both Part 1 and 2. 
 
 
After an initial screening period of up to 28 days (4 weeks), patients will be 
treated with FPA144 every 2 weeks in 28-day cycles. In Part 1A, each enrolled 
patient will be observed for 28 days for safety assessments and occurrence of 
dose-limiting toxicities (DLT Observation Period). Additional treatments may 
be administered every 2 weeks in 28 day cycles thereafter as clinically 
indicated (Extended Treatment Period). 
 
In Part 1B, patients will be treated with FPA144 every 2 weeks in 28-day 
cycles at the current Part 1A DLT-cleared dose levels.  
In Part 2, patients will be treated with FPA144 every 2 weeks in 28-day cycles 
at a recommended dose (RD) selected after assessment of data obtained in 
Parts 1A and 1B. 
 
Part 1A: Dose-Escalation 
Part 1A is a dose-escalation study in patients with any locally advanced or 
metastatic solid tumor or lymphoma for which standard therapies have been 
exhausted. Approximately 6 dose cohorts are anticipated, with a minimum of 
3 patients enrolled in each cohort. The anticipated dose levels are: 
Dose level 1: 
0.3 mg/kg FPA144 
Dose level 2: 
1 mg/kg FPA144 
Dose level 3: 
3 mg/kg FPA144 
Dose level 4: 
6 mg/kg FPA144 
Dose level 5: 
10 mg/kg FPA144 
Dose level 6: 
15 mg/kg FPA144 

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Study Design 
(Cont.): 
Review of safety and PK parameters may inform decisions to add cohorts with 
alternative dose levels or dose regimens (e.g. less frequent dosing) in order to 
reach an optimal target exposure. 
All dose escalation decisions will be based on assessment of DLTs, overall 
safety, and tolerability and will be made after the last patient enrolled in each 
cohort has completed the first treatment cycle. Dose escalation decisions will 
be agreed upon by the Cohort Review Committee (CRC), consisting of the 
Sponsor and Investigators.  
The maximum tolerated dose (MTD) is defined as the maximum dose at which 
< 33% of patients experience a DLT during Cycle 1 (Safety and PK 
Assessment Period). If a DLT is observed in 1 of 3 patients, then 3 additional 
patients will be enrolled at that same dose level. Dose escalation may continue 
until 2 of 3-6 patients treated at a dose level experience a DLT. The next lower 
dose will then be considered the MTD. Alternatively, an intermediate dose 
between the last cleared dose level and the dose level resulting in >33% DLTs 
may be explored before concluding that the MTD has been reached. Once the 
MTD or RD has been reached, 3-10 additional gastric cancer patients may be 
added prior to commencing Part 2, to further explore the safety and PK at this 
dose level. 
 
The following algorithm will be used for Part 1A dose escalation decisions:  
 
Number of Patients 
with DLTs 
Action 
0/3 
Open next cohort 
1/3 
Enroll 3 more patients in same cohort 
≥ 2/3 
Stop enrollment. Enter 3 more patients at dose 
level below, if only 3 were previously entered 
1/6 
Open next cohort 
≥ 2/6 
Stop enrollment. Enter 3 more patients at dose 
level below, if only 3 were previously entered. 
In the event no MTD is identified yet drug exposures exceed those deemed 
necessary based on nonclinical pharmacology data or the clinical PK profile, 
the Sponsor and Investigators may decide to discontinue dose escalation. 
Part 1A: Optional Extended Treatment Period 
On completion of Cycle 1 (Safety and PK Assessment Period), Part 1A 
patients may participate in an optional Extended Treatment Period, which 
begins on Day 1 of Cycle 2. FPA144 will be administered every 2 weeks in 4-

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week cycles until disease progression, unacceptable toxicity, patient or 
physician request to discontinue, death, or termination of the study. 
Study Design 
(Cont.): 
Part 1B: 
The purpose of Part 1B is to further assess safety and evaluate PK of FPA144 
in gastric cancer patients prior to commencing Part 2. Clearance of some 
antibodies (e.g., bevacizumab and trastuzumab) has been shown to be more 
rapid in gastric cancer patients than in patients with other solid tumors (Han 
2014, Cosson 2014). Enrolled patients may be gastric cancer patients whose 
tumors will be tested retrospectively, or those who are known to be FGFR2 
gene-amplified or FGFR2b protein-overexpressed. In a staggered fashion with 
Part 1A dose escalation, patients in Part 1B will be enrolled one dose level 
below the current highest dose level cohort being studied in Part 1A. For 
example, if the current dose level in Part 1A being studied is 3 mg/kg, 
enrollment of Part 1B patients will be at the 1 mg/kg dose level; if the current 
dose level being studied in Part 1A is 6 mg/kg, enrollment of Part 1B patients 
will be at the 3 mg/kg dose level.  
In Part 1B, approximately 3 patients may be enrolled at each dose level, with 
an election by the Sponsor and investigators to enroll up to 6 patients per dose 
cohort. Dose escalation may continue in Part 1B up to 15 mg/kg if no MTD in 
Part 1A is identified.  
 
Part 2: Dose Expansion 
Enrollment in Part 2 will begin when a recommended dose (RD) has been 
identified by the CRC, based on overall safety, tolerability, PK, and estimates 
of efficacious exposures extrapolated from nonclinical data. The RD may or 
may not be the same as the MTD identified in Part 1A. For example, if the 
MTD is not reached, or if exposure at the MTD is much higher than the level 
believed to be required for efficacy, or if data from Part 1B patients or 
subsequent cycles of treatment from both Parts 1 (A and B) provide additional 
insight on the safety profile, then the RD may be a different, though not higher, 
dose than the MTD. 
Once the RD has been established, patients with gastric cancer, bladder cancer, 
or with other locally advanced, recurrent or metastatic solid tumor types will 
be enrolled in Part 2 of the study.  Patients will be selected for enrollment in 
Part 2 based on FGFR2b expression, as determined by an accompanying 
validated laboratory test for the analysis of FGFR2b expression for each tumor 
type in which an assay is available. 
Part 2 patients will be enrolled and treated to further characterize safety and 
preliminary efficacy in a selected cancer patient population with the greatest 
potential for clinical benefit from FPA144 treatment. Treatment may continue 
until disease progression, unacceptable toxicity, patient or physician decision 
to discontinue, death, or termination of the study. 

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Study Design 
(Cont.): 
Two cohorts of patients with FGFR2b-selected tumors will enroll in Part 2, as 
follows: 
• Cohort A: Approximately 20 patients with gastric cancer with strong 
FGFR2b overexpression  
• Cohort F: Up to 30 patients with FGFR2b-selected non-gastric solid tumors, 
including patients with FGFR2b-selected bladder cancer. Enrollment of non-
gastric tumor types will be contingent on the development of an 
accompanying validated laboratory test for the analysis of FGFR2b 
overexpression.     
Based on Sponsor discretion, the following cohorts will be closed for 
enrollment in Part 2: 
• Cohort B: Patients with FGFR2b overexpressing gastric cancer in the 
absence of FGFR2 amplification  
• Cohort C: Patients with gastric cancer without FGFR2b overexpression 
• Cohort D: Patients with gastric cancer with moderate FGFR2b 
overexpression  
• Cohort E: Patients with gastric cancer with low FGFR2b overexpression  
Study Population: 
Inclusion Criteria 
Patients enrolling into Part 1(A or B) or Part 2 must meet all of the following 
inclusion criteria: 
1. Understand and sign an Institutional Review Board/Independent Ethics 
Committee-approved informed consent form prior to any study-specific 
evaluation 
2. Life expectancy of at least 3 months 
3. ECOG performance status of 0 to 1 
4. Age 18 years at the time the informed consent form is signed except for 
the patients in Taiwan, where the patient’s age must be  20 at the time the 
informed consent form is signed.  

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Study Population 
(Cont.) 
5. In sexually-active patients (i.e., females of child bearing potential, who 
have not undergone menopause as defined by 12 consecutive months of 
amenorrhea or had a permanent sterilization procedure and males, who 
have not had a permanent sterilization procedure), willingness to use 2 
effective methods of contraception, of which one must be a physical 
barrier method (condom, diaphragm, or cervical/vault cap) until 6 months 
after the last dose of FPA144. Other effective forms of contraception are 
permanent sterilization (hysterectomy and/or bilateral oophorectomy, or 
bilateral tubal ligation with surgery, or vasectomy) at least 6 months prior 
to Screening. Female patients of childbearing potential must be on stable 
oral contraceptive therapy or intrauterine or implant device for at least 90 
days prior to the study, or abstain from sexual intercourse as a way of 
living. 
 
6. Adequate hematological and biological function, confirmed by the 
following laboratory values: 
a) Bone Marrow Function 
• 
ANC 1.5 x 109/L 
• 
Platelets >100 x 109/L  
• 
Hemoglobin 9 g/dL 
b) Hepatic Function 
• 
Aspartate aminotransferase (AST) and alanine aminotransferase 
(ALT) 3 x upper limit of normal (ULN); if liver metastases, then 
5 x ULN  
• 
Bilirubin 1.5 x ULN 
c) Renal Function  
• 
Serum creatinine 1.5 x ULN 
7. Tumor tissue for determination of FGFR2b expression (optional for Part 
1A patients)   
 
Patients enrolling into Part 1A (Dose-Escalation) of the study must also meet 
the following inclusion criteria: 
8. Histologically or cytologically confirmed solid tumor or lymphoma that is 
locally recurrent or metastatic and has progressed following standard 
treatment or is not appropriate for standard treatment 
9. Measurable or Non-measurable disease  

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Study Population 
(Cont.) 
Patients enrolling into Part 1B of the study must also meet the following 
inclusion criteria: 
10. Histologically documented gastric or gastroesophageal cancer 
11. Tumor tissue for prospective or retrospective determination of FGFR2b 
expression and FGFR2 amplification 
12. Locally recurrent or metastatic disease that has progressed following 
standard treatment or is not a candidate for standard treatment  
13. Measurable disease as defined by RECIST version 1.1 
 
Patients enrolling into Part 2 (Dose-Expansion) of the study must also meet 
the following inclusion criteria: 
14. The following tumor types, by cohort: 
• 
Cohort 2A:  Histologically documented gastric or gastroesophageal 
cancer with FGFR2b overexpression, as determined by an 
accompanying validated IHC assay 
• 
Cohort 2F: Histologically or cytologically confirmed bladder cancer 
including tumors of the renal pelvis, ureters, urinary bladder, or 
urethra, or other histologically or cytologically confirmed solid tumor 
types with FGFR2b overexpression, as determined by an 
accompanying validated laboratory test for the analysis of FGFR2b 
expression 
15. Tumor tissue for prospective determination of FGFR2b overexpression and 
retrospective determination of FGFR2 amplification and other molecular 
aberrations (as applicable) 
16. Locally recurrent or metastatic disease that has progressed following 
standard treatment or is not appropriate for standard treatment  
17. Measurable disease as defined by RECIST version 1.1 
 
 
Exclusion Criteria 
Patients enrolling into Part 1(A or B) or Part 2 will be excluded if any of the 
following criteria apply: 
1. Untreated or symptomatic central nervous system (CNS) metastases. 
Patients with asymptomatic CNS metastases are eligible provided they 
have been clinically stable for at least 4 weeks and do not require 
intervention such as surgery, radiation or any corticosteroid therapy for 
management of symptoms related to CNS disease. 
 

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Study Population 
(Cont.) 
2. Impaired cardiac function or clinically significant cardiac disease, 
including either of the following: 
• 
Unstable angina pectoris 6 months prior to first scheduled dose of 
FPA144 
 
• 
Acute myocardial infarction 6 months prior to first scheduled dose 
of FPA144 
 
3. QTc segment >470 msec 
 
4. Known human immunodeficiency virus (HIV) or acquired 
immunodeficiency syndrome (AIDS)-related illness, or history of chronic 
hepatitis B or C. 
5. Treatment with any anticancer therapy or participation in another 
therapeutic clinical study with investigational drugs 14 days ( 28 days 
for patients in Korea) prior to first dose of FPA144. 
 
6. Ongoing acute adverse effects from prior treatment > NCI CTCAE Grade 
1.  
7. Retinal disease or a history of retinal disease or detachment or, in the 
ophthalmologist’s opinion, increased risk for retinal detachment 
8. Corneal defects, corneal ulcerations, keratitis, keratoconus, history of 
corneal transplant, or other known abnormalities of the cornea that may, in 
the opinion of an ophthalmologist, pose a risk with FPA144 treatment. 
9. NSCLC patients with exon 19 or 21 EGFR mutation or ALK amplification 
who have not received an EGFR or ALK TKI, respectively (Part 1A only)  
10. Gastric and breast cancer patients with HER2 over-expression who have 
not received anti-HER2 targeted therapy. 
11. Major surgical procedures are not allowed ≤28 days prior to FPA144 
administration. In all cases the patient must be sufficiently recovered and 
stable before treatment administration. 

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Study Population 
(Cont.) 
12. Females who are pregnant or breastfeeding; women of childbearing 
potential must not be considering getting pregnant during the study. 
13. Presence of any serious or unstable concomitant systemic disorder 
incompatible with the clinical study (e.g., substance abuse, psychiatric 
disturbance, or uncontrolled intercurrent illness including active infection, 
arterial thrombosis, and symptomatic pulmonary embolism) 
14. Presence of any other condition that may increase the risk associated with 
study participation or may interfere with the interpretation of study results, 
and, in the opinion of the Investigator, would make the patient 
inappropriate for entry into the study. 
15. Known allergy or hypersensitivity to components of the FPA144 
formulation including polysorbate. 
 
16. History of prior malignancy except: 
a) Curatively treated non-melanoma skin cancer or 
b) Solid tumor treated curatively more than 5 years previously without 
evidence of recurrence or 
c) History of other malignancy that in the Investigator’s opinion would 
not affect the determination of study treatment effect. 
 
17. In Part 1B and 2 (Dose Expansion), prior treatment with any selective 
inhibitor (e.g., AZD4547, BGJ398, JNJ-42756493, BAY1179470) of the 
FGF-FGFR pathway 
No waivers of these inclusion or exclusion criteria will be granted. 
Study Treatment: 
FPA144 will be supplied in a sterile vial for dilution into an intravenous bag 
for administration by the study site. 
In Part 1A, patients will receive 2 doses of FPA144, 2 weeks apart. If this is 
tolerated without disease progression by the end of the first cycle, patients will 
be eligible to continue on study in the Extended Treatment Period and receive 
FPA144 every 2 weeks until disease progression or other cause for study 
withdrawal. 
Dose-Modification 
Criteria: 
Dose reductions may be permitted for patients on treatment beyond the DLT 
period in Part 1A or any patient in Parts 1B or 2 upon discussion with and 
approval by the Sponsor. 
Patients may miss up to 2 consecutive doses (up to 6 weeks between doses) for 
adverse or other events; omission of additional dosing longer than 6 weeks for 
adverse or other events will necessitate the patient’s removal from the study 
unless allowed by the study Sponsor. 
Intra-patient dose escalation above the starting dose for each patient in Part 1 
(A and B) and Part 2 will not be permitted. If a patient’s dose is decreased for 
a reason that is no longer relevant, dose escalation to the originally assigned 
dose may occur after discussion and approval by the Sponsor. 

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Concomitant 
Medications: 
Supportive care (e.g., anti-emetics; analgesics for pain control) may be used at 
the Investigator’s discretion and in accordance with institutional procedures. 
Hematopoietic stimulating agents may be used if indicated. Concomitant 
anticancer therapies of any kind are not permitted except chronic maintenance 
therapies, such as luteinizing hormone releasing hormone (LHRH)-modulating 
agents for breast or prostate cancer, which may be continued if the patient has 
been on these agents and 1) continued use is unlikely to result in additional 
reduction in tumor measurements and 2) is considered standard therapy for the 
patient. 
Withdrawal 
Criteria: 
A patient must be discontinued from protocol-prescribed therapy if any of the 
following apply: 
• Consent withdrawal at the request of the patient or their legally authorized 
representative 
• Progression of patient’s disease. Patients who are receiving clinical benefit 
despite isolated disease progression may continue on study after discussion 
with Medical Monitor 
 
• Any event that would pose an unacceptable safety risk to the patient 
 
• A concurrent illness that would affect assessments of the clinical status to a 
significant degree and require discontinuation of therapy 
 
• A positive pregnancy test at any time during the study 
• At the specific request of the Sponsor or its authorized representative (e.g., 
if the study is terminated for reasons of patient safety) 
Pharmacokinetic 
Assessments: 
Patients enrolled in Parts 1A and 1B will have blood sampling for 
measurement of serum FPA144 concentration during Cycle 1 Days 1, 2, 4, and 
8. In addition, blood samples will be collected both before and at the end of the 
infusion at Cycle 1 Day 15 and Cycles 2-5 Day 1 and every other cycle Day 1 
starting from Cycle 5 as well as at the end of treatment.  
For patients in Part 2, Cycle 1 blood samples will be collected on Cycle 1 Days 
1 and 8. Blood samples will be collected on Cycle 1 Day 15 and Cycles 2-5 
Day 1 and every other cycle Day 1 starting from Cycle 5 both before and at the 
end of each infusion as well as the end of treatment to explore the PK in 
enrolled patients. 
Standard PK parameters will be determined based on serum FPA144 
concentration-time data. 
Immunogenicity: 
All patients in the study will have blood samples collected prior to dosing on 
Day 1 of Cycles 1-5 and every over other cycle from Cycle 5 for measurement 
of anti-FPA144 antibodies.  
 

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Efficacy 
Assessments: 
Efficacy measures will include tumor assessments consisting of clinical 
examination and appropriate imaging techniques, preferably computed 
tomography (CT) scans of the chest, abdomen, and pelvis with appropriate 
slice thickness per RECIST; other assessments (magnetic resonance imaging 
[MRI], X-ray, positron emission tomography (PET), and ultrasound) may be 
performed, if required. Tumor assessments will be performed at Screening, 
then every 6 weeks from the first dose, for 24 weeks, and then approximately 
every 12 weeks thereafter. Once an initial complete response (CR) or partial 
response (PR) is noted, confirmatory scans must be performed 4–6 weeks later.  
Safety 
Assessments: 
Safety measures will include AEs, hematology, clinical chemistry, urinalysis, 
vital signs, body weight, concomitant medications/procedures, ECOG 
performance status, targeted physical exams, ECGs, ophthalmology/retinal 
examinations, and FPA144 dose modifications. 
Pharmacodynamic 
Assessments: 
Tumor biopsies, mandatory as feasible, will be performed before treatment and 
either at 15 days or 29 days on-treatment for all patients in Part 2 (see 
Section 6.4). Feasibility at each timepoint will be assessed by the Investigator 
and should include a consideration of patient safety. Patients may also have an 
optional on-treatment biopsy upon documented tumor response and/or optional 
post-treatment biopsy upon documented tumor progression after discussion 
with the Sponsor. 
Statistical 
Procedures: 
The total enrollment planned for this study was approximately 70–
210 patients. Based on the Sponsor decision to close a subset of cohorts in Part 
2 (as described in Section 4.1), the planned patient enrollment will be 
approximately 100 patients. 
Approximately 20–30 patients will be enrolled into Part 1A. In Part 1B, up to 
30 patients with gastric cancer will be enrolled. For Part 2, exploratory activity 
will be examined by enrollment of:  
• Cohort A: Approximately 30 patients with gastric cancer with strong 
FGFR2b overexpression defined as IHC 3+ ≥ 10% tumor membrane 
staining. 
• Cohort C: Approximately 10-30 patients with gastric cancer without 
FGFR2b overexpression (IHC 0).  Expansion of this cohort to 30 patients 
will be contingent on Sponsor’s decision to evaluate additional patients 
without FGFR2b overexpression as a basis for exploring patient selection 
based on FGFR2b expression. 
 

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Statistical 
Procedures 
(Cont.): 
The following additional cohorts may be explored in Part 2 at the discretion of 
the Sponsor:  
• Cohort D: Approximately 30 patients with gastric cancer with moderate 
FGFR2b overexpression defined as IHC 2+ ≥ 10% and/or IHC 3+ < 10% 
tumor membrane staining.%. Enrollment in this cohort will be contingent on 
Sponsor’s decision to explore lower IHC score limits. 
• Cohort E: Approximately 30 patients with gastric cancer with low FGFR2b 
overexpression defined as IHC 1+ and/or IHC 2+ < 10% tumor membrane 
staining.%. Enrollment in this cohort will be contingent on Sponsor’s 
decision to explore lower IHC score limits. 
• Cohort F: Approximately 30 patients with FGFR2b-selected non-gastric 
solid tumors, including patients with FGFR2b-selected bladder cancer. 
Enrollment of  additional tumor types will be contingent on the development 
of an accompanying validated laboratory test for the analysis of FGFR2b 
overexpression.     
 

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List of Key Study Personnel 
Sponsor: 
 
Neyssa Marina, MD 
FivePrime Therapeutics, Inc. 
Two Corporate Drive 
South San Francisco, CA 94080-7047 
+ 1 650-745-9676 (office) 
+ 1 650-996-0510 (mobile) 
+ 1 415-365-5615 (fax)  
 
Helen Collins, MD 
FivePrime Therapeutics, Inc. 
Two Corporate Drive 
South San Francisco, CA 94080-7047 
+ 1 707-321-8168  (mobile) 
+ 1 650-745-9633 (office) 
+ 1 415-365-5615 (fax) 
Contract Research 
Organization: 
INC Research, LLC 
3201 Beechleaf Court 
Suite 600  
Raleigh, NC 27604-1547 
+1 919-876-9300 (office) 
+1 919-882-0425 (fax) 
Serious Adverse Event 
Reporting: 
INC Research Safety and Pharmacovigilance 
+ 1 877-464-7787 (Fax) 
INCDrugSafety@INCResearch.com (email) 
 

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Table of Contents 
Protocol Approval Signature Page ................................................................................... 2 
Declaration of the Investigator ......................................................................................... 3 
Protocol Synopsis ............................................................................................................... 4 
List of Key Study Personnel ........................................................................................... 16 
Table of Contents ............................................................................................................. 17 
List of Abbreviations and Definitions ............................................................................ 23 
1. 
Introduction ............................................................................................................. 25 
1.1 
Background .............................................................................................................25 
1.2 
Overview of the FGF/FGFR Pathway ..................................................................26 
1.3 
The Role of FGFR2 in Normal Tissue Homeostasis and in Cancer ..................26 
1.4 
FPA144: An FGFR2b Specific Antibody .............................................................27 
1.5 
Nonclinical Studies with FPA144 ..........................................................................28 
1.5.1 
In Vivo Pharmacology ...............................................................................28 
1.5.1.1 
In Vivo Anti-Tumor Studies .............................................................. 28 
1.5.1.2 
In Vivo ADCC Activity of FPA144 .................................................. 29 
1.5.1.3 
FPA144 Induces Tumor-Specific Innate and Adaptive Immune 
Profile Changes ................................................................................. 30 
1.5.2 
FPA144 Exposure Efficacy Relationships .................................................30 
1.5.3 
Toxicology .................................................................................................31 
1.6 
Patient Selection .....................................................................................................32 
1.7 
Clinical Experience with FPA144 .........................................................................34 
1.8 
FPA144 Starting Dose Justification ......................................................................36 
1.9 
Risk-Benefit Assessment ........................................................................................36 
2. 
Study Objectives and Endpoints ........................................................................... 39 
2.1 
Primary Objectives ................................................................................................39 
2.2 
Secondary Objectives .............................................................................................39 
2.3 
Exploratory Objectives ..........................................................................................39 
2.4 
Primary Study Endpoints ......................................................................................40 

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2.5 
Secondary Endpoints .............................................................................................40 
2.6 
Exploratory Endpoints ..........................................................................................40 
3. 
Overall Design and Plan of the Study ................................................................... 40 
3.1 
Overview .................................................................................................................40 
3.1.1 
Screening Period ........................................................................................40 
3.1.2 
Part 1A (Dose Escalation) ..........................................................................41 
3.1.3 
Part 1B .......................................................................................................43 
3.1.4 
Part 2 (Dose Expansion) ............................................................................43 
3.2 
Procedures ...............................................................................................................43 
3.2.1 
Ophthalmologic Monitoring ......................................................................44 
3.2.2 
Tumor Analysis for Patient Selection ........................................................45 
3.2.3 
Optional Exploratory Archival Tumor Tissue Analysis ............................46 
3.3 
Study Schema ..........................................................................................................47 
3.4 
Rationale for the Study Design .............................................................................48 
4. 
Study Eligibility and Withdrawal Criteria .......................................................... 48 
4.1 
Planned Number of Patients and Study Centers .................................................48 
4.2 
Inclusion Criteria for Study Participation ...........................................................49 
4.2.1 
Part 1A (Dose-Escalation) .........................................................................49 
4.2.2 
Part 1B .......................................................................................................50 
4.2.3 
Part 2 (Dose-Expansion) ............................................................................50 
Exclusion Criteria for Study Participation ......................................................................50 
4.2.4 
Additional Part 1B and Part 2 (Dose Expansion) Exclusion Criteria ........52 
4.3 
Patient Withdrawal and Replacement .................................................................52 
4.4 
Patient Identification and Enrollment ..................................................................52 
4.5 
Pre-Study Screening (Part 1B and Part 2) ...........................................................53 
5. 
Study Drug .............................................................................................................. 54 
5.1 
Identity ....................................................................................................................54 
5.2 
Administration ........................................................................................................54 
5.3 
Packaging, Labeling, and Storage ........................................................................54 
5.4 
Starting Dose and Dose Modifications .................................................................55 

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5.4.1 
Dose Escalation of FPA144 between Cohorts (Part 1A) ...........................55 
5.4.2 
Dose Escalation of FPA144 (Part 1B) .......................................................56 
5.4.2.1 
Maximum Tolerated Dose ................................................................. 56 
5.4.2.2 
Toxicity at Lowest Dose Level .......................................................... 56 
5.4.3 
Dose Escalation within a Cohort................................................................56 
5.4.4 
Dose-Limiting Toxicity .............................................................................56 
5.4.5 
Dose Modification Criteria ........................................................................57 
5.4.6 
Dose Interruptions during Study Drug Infusion ........................................58 
5.5 
Blinding and Breaking the Blind ..........................................................................59 
5.6 
Drug Accountability ...............................................................................................59 
5.7 
Investigational Product Compliance ....................................................................59 
5.8 
Concomitant Medication and Treatment .............................................................59 
6. 
Parameters and Methods of Assessment .............................................................. 60 
6.1 
Tumor Response Parameters ................................................................................60 
6.2 
Safety Parameters ..................................................................................................61 
6.2.1 
Adverse Events ..........................................................................................61 
6.2.1.1 
Collection of Adverse Events ............................................................ 61 
6.2.1.2 
Definitions ......................................................................................... 61 
6.2.1.3 
Assessment of Adverse Events .......................................................... 62 
6.2.1.4 
Recording Adverse Events ................................................................ 65 
6.2.1.5 
Reporting Serious Adverse Events .................................................... 65 
6.2.1.6 
Follow-up of Adverse Events ............................................................ 67 
6.2.1.7 
Pregnancy .......................................................................................... 67 
6.2.2 
Laboratory Parameters ...............................................................................67 
6.2.3 
Vital Signs ..................................................................................................69 
6.2.4 
Electrocardiograms ....................................................................................69 
6.2.5 
Pregnancy ...................................................................................................69 
6.2.6 
Physical and Ophthalmologic Examinations .............................................69 
6.2.7 
Immunogenicity .........................................................................................70 
6.2.8 
Optional Test for FCGR Polymorphisms ..................................................70 
6.2.9 
Exploratory Blood Based Biomarker Analysis for Patients in Part 2 ........70 
6.2.10 
ECOG Performance Status ........................................................................70 

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6.3 
Pharmacokinetic Parameters ................................................................................71 
6.4 
Tumor Biopsy in Part 2 .........................................................................................71 
7. 
Study Conduct ......................................................................................................... 73 
7.1 
Overview of Patient Assessments ..........................................................................73 
7.2 
Study Assessments and Procedures by Visit ........................................................73 
7.2.1 
Pre-Study Period (Parts 1B and 2) .............................................................73 
7.2.2 
Screening Period (Day –28 to Day 0) ........................................................73 
7.2.3 
Treatment Allocation (Dosing Assignment) ..............................................74 
7.2.4 
Cycle 1, Day 1 (Parts 1A, 1B, and 2) .........................................................75 
7.2.5 
Cycle 1, Day 2 (Part 1A and B only) .........................................................76 
7.2.6 
Cycle 1, Day 4 (Part 1A and 1B only) .......................................................76 
7.2.7 
Cycle 1, Day 8 (Parts 1A, 1B and 2) ..........................................................76 
7.2.8 
Cycle 1, Day 15 (Parts 1A, B, and 2).........................................................76 
7.2.9 
End of Cycle 1 (Part 1A only) ...................................................................77 
7.2.10 
Part 1A Extended Treatment/Part 1B and Part 2 Cycle 2 and 
Subsequent Cycles .....................................................................................77 
7.2.10.1 
Cycle 2 and Subsequent Cycles, Day 1 and Day 15 
(Parts 1A, 1B, and 2) ......................................................................... 78 
7.2.11 
End-of-Treatment Visit or Early Termination ...........................................79 
8. 
Statistical Methods.................................................................................................. 80 
8.1 
Study Patients .........................................................................................................80 
8.1.1 
Disposition of Patients ...............................................................................80 
8.1.2 
Protocol Deviations ....................................................................................80 
8.1.3 
Analysis Populations ..................................................................................80 
8.2 
General Considerations .........................................................................................81 
8.3 
Demographics, Baseline Characteristics, and Concomitant Medications ........81 
8.4 
Treatment Compliance ..........................................................................................81 
8.5 
Analyses of Tumor Response ................................................................................82 
8.6 
Safety Analyses .......................................................................................................82 
8.7 
Efficacy Analysis ....................................................................................................82 
8.8 
Pharmacokinetic Analyses .....................................................................................83 

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8.9 
Interim Analyses .....................................................................................................83 
8.10 
Determination of Sample Size ...............................................................................83 
9. 
Ethical, Legal, and Administrative Aspects ......................................................... 85 
9.1 
Data Quality Assurance .........................................................................................85 
9.2 
Electronic Case Report Forms and Source Documentation ...............................85 
9.3 
Access to Source Data ............................................................................................85 
9.4 
Data Processing ......................................................................................................86 
9.5 
Archiving Study Records .......................................................................................86 
9.6 
Good Clinical Practice ...........................................................................................87 
9.7 
Informed Consent ...................................................................................................87 
9.8 
Protocol Approval and Amendment .....................................................................87 
9.9 
Cohort Review Committee ....................................................................................88 
9.10 
Duration of the Study .............................................................................................88 
9.11 
Premature Termination of the Study or Cohorts ................................................88 
9.12 
Confidentiality ........................................................................................................88 
9.13 
Other Ethical and Regulatory Issues ....................................................................88 
10. References ................................................................................................................ 90 
11. Appendices ............................................................................................................... 93 
 
 
 

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Tables in Text 
Table 1: 
Dose-Escalation Considerations ............................................................................42 
Table 2: 
Decision Criteria for Escalation .............................................................................55 
Table 3: 
Dose Modification Guidelines (Non-corneal Toxicity) .........................................57 
Table 4: 
Dose Modification Guidelines for FPA144-related Corneal Toxicity ...................58 
Table 5: 
Laboratory Assessments ........................................................................................68 
Table 6: 
Parameters of Simon’s 2-stage Design ..................................................................84 
 
Figures in Text 
Figure 1: 
Tumor Growth Inhibition in OCUM-2 Gastric Cancer Cell Line .........................29 
Figure 2: 
FPA144 but Not an ADCC-Deficient FGFR2b Antibody Leads to Tumor 
Suppression in a Syngeneic Tumor Model with Modest FGFR2b Expression .....30 
Figure 3: 
Study Schema.........................................................................................................47 
 
List of Appendices 
Appendix 1: 
Schedule of Assessments–Dose Escalation and Dose Expansion Cohorts ............94 
Appendix 2: 
Study Flowchart for Pharmacokinetic, Immunogenicity, and 
Pharmacodynamic Blood Sample Collections for Part 2 .......................................97 
Appendix 3: 
ECOG Performance Status ....................................................................................98 
Appendix 4: 
Fluorescein Stain Grading Systems .......................................................................99 
 
 
 

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List of Abbreviations and Definitions 
ADA 
Anti-drug antibody 
ADCC 
Antibody-dependent cell-mediated cytotoxicity  
AE 
Adverse event 
ALK 
Anaplastic lymphoma kinase 
ALT 
Alanine transaminase  
ANC 
Absolute neutrophil count 
ANOVA 
Analysis of variance 
APTT 
Activated partial thromboplastin time 
AST 
Aspartate transaminase 
-HCG 
Beta-human chorionic gonadotropin 
BUN 
Blood urea nitrogen 
CBC 
Complete blood count 
Cmax 
Maximum serum concentration 
Cmin 
Minimum serum  concentration 
CNS 
Central nervous system 
CO2 
Carbon dioxide (bicarbonate) 
CR 
Complete response 
CRC 
Cohort Review Committee 
CRO 
Contract research organization 
CT 
Computed tomography 
CTCAE 
Common Terminology Criteria for Adverse Events 
DLT 
Dose-limiting toxicity 
eCRF 
Electronic case report form 
ECG 
Electrocardiogram 
ECOG 
Eastern Cooperative Oncology Group 
EGFR 
Epidermal growth factor receptor 
EOT 
End of treatment 
FDA 
Food and Drug Administration 
FGF 
Fibroblast growth factor (subtypes, e.g., FGF-1, FGF-2) 
FGFR 
Fibroblast growth factor receptor (subtypes, e.g., FGFR1, FGFR2) 
FISH 
Fluorescence in situ hybridization 
FRS2 
FGF receptor substrate-2 
GCP 
Good Clinical Practice 
GLP 
Good Laboratory Practice 

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HER 
Human epidermal growth factor receptor 
HIV 
Human immunodeficiency virus 
HNSTD 
Highest non-severely toxic dose 
IB 
Investigator’s Brochure 
ICF 
Informed consent form 
ICH 
International Conference on Harmonization 
IEC 
Independent Ethics Committee  
Ig 
Immunoglobulin 
IHC 
Immunohistochemistry 
IND 
Investigational New Drug (application) 
INR 
International normalized ratio 
IRB 
Institutional Review Board 
IV 
Intravenous 
LDH 
Lactate dehydrogenase 
LHRH 
Luteinizing hormone-releasing hormone 
MABEL 
Minimal anticipated biologic effect level 
MCH 
Mean corpuscular hemoglobin 
MCHC 
Mean corpuscular hemoglobin concentration 
MCV 
Mean corpuscular volume 
MRI 
Magnetic resonance imaging 
mRNA 
Messenger ribonucleic acid 
MTD 
Maximum tolerated dose 
NCI 
National Cancer Institute 
NOAEL 
No observed adverse effect level 
NSCLC 
Non-small cell lung cancer 
OCT 
Ocular coherence tomography 
ORR 
Objective response rate 
PD 
Progressive disease 
PET 
Positron emission tomography 
PFS 
Progression free survival 
PK 
Pharmacokinetics 
PR 
Partial response 
PS 
Performance status 
PSA 
Prostate-specific antigen 
QTc 
Corrected QT interval 

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RBC 
Red blood cell 
RD 
Recommended dose 
RECIST 
Response Evaluation Criteria in Solid Tumors 
RNA 
Ribonucleic acid 
RPE 
Retinal pigmented epithelium 
RVO 
Retinal vein occlusion 
SAE 
Serious adverse event 
SAP 
Statistical analysis plan 
SD 
Stable disease 
t1/2 
Half-life 
TKI 
Tyrosine kinase inhibitor 
ULN 
Upper limit of normal 
WBC 
White blood cell 
 
1. Introduction 
1.1 
Background  
The role of the fibroblast growth factor (FGF)-FGF receptor (FGFR) pathway in cancer is well 
known. FGFs can stimulate the transformation and proliferation of tumor cells and stimulate 
angiogenesis. There are 22 known human FGFs with the expression of individual FGFs generally 
restricted to specific tissues, cell types, and/or developmental stage. Fibroblast growth factor 
signaling is mediated by a family of transmembrane tyrosine kinase receptors encoded by 4 
distinct genes producing FGF receptor subtypes termed FGFR1–4 (Turner 2010).  
The FGFR2 has two splicing variants, b and c. In general, FGFR2b is expressed in tissues of 
epithelial origin (e.g., stomach, skin) (Miki 1992). The major ligands signaling through FGFR2b 
are FGF7, FGF10 and FGF22. Alteration in signaling in the FGF/FGFR2 pathway (e.g. 
overexpression of FGFR2b protein or amplification of FGFR2 gene) has been associated with 
gastric, breast, and other cancers, and appears to portend a worse prognosis (Wu 2013, Turner 
2010). In fact, as early as 1990, subsets of patients with gastric cancer (~3-9%) and breast cancer 
(1–2%) were noted to have amplification of the FGFR2 gene, which resides on chromosome 
10q26. In gastric cancer, FGFR2 amplification leads to high-level expression of the FGR2b 
receptor on the surface of the cells. 
FPA144 is a humanized monoclonal antibody (IgG1 isotype) specific to the human FGFR2b 
receptor (NCBI reference sequence ID NP_001138385.1) that blocks FGF ligand binding to the 
receptor. This antibody is glycosylated, but is produced in a CHO cell line that lacks the FUT8 
gene (α1,6-Fucosyltransferase) and therefore lacks a core fucose in the polysaccharide portion of 
the antibody. The absence of the core fucose results in higher affinity for the Fc receptor 

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FcγRIIIa compared to the fucosylated molecule and potentially enhances immune cell-mediated 
tumor cell killing (Shinkawa 2003).  
FPA144 inhibits FGF ligand-stimulated FGFR2b phosphorylation and cell proliferation in cell 
culture in FGFR2b overexpressing gastric and breast cancer cell lines. FPA144 also inhibits 
tumor growth in FGFR2b overexpressing gastric and breast xenograft models. In addition, 
FivePrime has demonstrated in vitro that FPA144 mediates antibody-dependent cell-mediated 
cytotoxicity (ADCC) in cells expressing FGFR2b. The 3 potential mechanisms of action of 
FPA144 include blocking ligand binding and downstream signaling, decreasing expression of the 
FGFR2b driver protein and enhancing ADCC.  
As FPA144 is a targeted biologic, the clinical development of FPA144 will ultimately be in 
selected patients with alterations in the FGFR2b pathway that are most likely to respond to this 
novel agent. The tumor types most relevant to date include gastric and bladder cancer, as well as 
potentially breast, ovarian, and cholangiocarcinoma. Each of these cancers is in need of new 
therapeutic options. FPA144, a selective FGFR2b inhibitor, may offer benefit in patients with 
appropriately selected tumors, with an improved safety profile relative to less or non-targeted 
therapeutics. 
1.2 
Overview of the FGF/FGFR Pathway 
FGF signaling is mediated by a family of transmembrane tyrosine kinase receptors encoded by 
four distinct genes producing four FGF receptor (FGFR) subtypes termed FGFR1–4. Splice 
variations lead to several receptor variants, including two predominant isoforms each of FGFR1–
3 and one isoform of FGFR4. Many FGFs have high affinity binding to multiple FGF receptors 
and as such each FGF receptor has a characteristic binding profile.  
The extracellular domains of the FGFRs contain 3 immunoglobulin (Ig)-like domains. The 
carboxyl-terminal segment of the third Ig domain of FGFR1–3 can be encoded by two different 
exons, designated IIIb and IIIc, leading to expression of two distinct proteins, FGFR2b and 
FGFR2c. This alternative splicing regulates both ligand specificity and tissue distribution. In the 
literature, FGFR2b is generally referred to as FGFR2IIIb, FGFR2b, or K-sam. FGFR2b 
expression is largely restricted to epithelial tissues, and this isoform has high affinity for the FGF 
ligands FGF7, FGF10, and FGF22, with lower affinity for FGF21, FGF1 and FGF3. Among 
FGF receptors, FGF7, FGF10, and FGF22 bind exclusively to FGFR2b (Zhang 2006). 
FPA144 selectively targets the FGFR2b isoform. It does not bind to the FGFR2c receptor 
isoform or to any other FGFR. 
1.3 
The Role of FGFR2 in Normal Tissue Homeostasis and in Cancer 
FGFR2 plays important roles in embryonic development and tissue repair. FGFR2 knockout 
mice are embryonic lethal (Xu 1998). The role of FGFR2 in normal adult tissue homeostasis is 
less well defined but has been explored by a series of tissue-specific conditional knockouts 
(Grose 2007) and by expression of a dominant negative version of the FGFR2b receptor (Werner 

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1994). In rodents, the FGFR2b is known to be important for incisor stem cells and continued 
growth of incisors throughout life (Lin 2009, Parsa 2010), which is not relevant in humans. Other 
data suggest there is a degree of redundancy between the FGFR1 and FGFR2 pathways in the 
maintenance of the skin (Yang 2010), liver and central nervous system (Böhm 2010), suggesting 
a selective approach to blocking the FGFR2b pathway is preferable to therapeutics with broader 
FGFR pathway inhibition. 
High levels of FGFR2 expression have been found in many advanced solid tumors including 
gastric and bladder cancer. Specifically, FGFR2b can be highly expressed on tumors either via 
amplification of the FGFR2 gene or via transcriptional regulation of the FGFR2b isoform. Using 
a validated immunohistochemistry (IHC) assay to specifically detect FGFR2b expression in solid 
tumors, approximately 9% of gastric cancers and 10% of bladder cancers were observed to 
express a range of FGFR2b protein. 
In patients with gastric cancer, 3–9% have amplification of the FGFR2 gene, which resides on 
chromosome 10q26 (Hattori 1990, Turner 2010).  This amplification is most often found in 
poorly differentiated gastric cancer samples, results in high levels of FGFR2b overexpression, 
and is correlated with a poor prognosis (Jung 2012). Interestingly, amplification of FGFR2 is 
very rare in gastric tumors that overexpress or have amplification of the HER2 gene (Deng 
2012), as those pathways appear to be largely mutually exclusive. In addition to FGFR2 
amplification, there may be a subset of gastric cancer patients whose tumors overexpress 
FGFR2b in the absence of amplification; similar to patients with FGFR2 amplification, these 
patients are thought to have a poor prognosis (Hattori 1996)..  
Some other tumor types have also been found to have dysregulation of the FGFR2 signaling 
pathway. Similar to gastric cancer FGFR2 amplification has been found in a small percentage of 
triple negative breast cancers (Turner 2010). FGFR2b protein overexpression has been found in 
ovarian cancer (Steele 2001), endometrial and lung cancers. In addition, FGFR2 gene 
translocations have been identified in cholangiocarcinoma (Wu 2013). These tumors, selected for 
FGFR2b overexpression, may also be responsive to treatment with FPA144. 
1.4 
FPA144: An FGFR2b Specific Antibody 
FPA144 is an antibody to the third Ig region of the FGFR2b receptor isoform, the region that is 
alternatively spliced and regulates ligand specificity. FPA144 recognizes only the b isoform of 
the FGFR2. The antibody has been glycoengineered for enhanced ADCC (Gemo 2014). When 
the antibody recognizes the FGFR2b receptor on the cell surface, it blocks ligand binding and 
downstream signaling including cell proliferation. Enhanced ADCC may increase tumor cell 
killing. Since FPA144 is specific for the FGFR2b receptor, it does not interfere with signaling of 
the other FGFs/ FGFRs, including FGFR2c. Additionally and in contrast to the FGFR TKIs, 
FPA144 does not inhibit FGF23 signaling. FGF23 is a ligand involved in calcium/phosphate 
metabolism. Thus, treatment with FPA144 is not expected to cause significant dose-limiting 

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hyperphosphatemia associated with the FGFR TKIs (Andre 2013, Brown 2005, Dienstmann 
2014, Sequist 2014). 
1.5 
Nonclinical Studies with FPA144  
There are three potential mechanisms of action of FPA144. It blocks ligand binding and 
downstream signaling, decreases expression of the FGFR2b driver protein and has enhanced 
ADCC. These mechanisms have been explored both in vitro and in vivo. 
1.5.1 In Vivo Pharmacology 
1.5.1.1 In Vivo Anti-Tumor Studies  
FPA144 has been studied in a series of mouse xenograft models using human gastric and breast 
tumor cell lines that contain the FGFR2 amplicon. These FGFR2 amplified lines all express high 
levels of the FGFR2b protein and respond to FPA144 in a dose-dependent fashion. A dose 
response study (twice weekly dosing) was performed with the most sensitive model, a gastric 
cancer line, OCUM-2 (Figure 1). Mice were treated at the indicated concentrations of FPA144, 
and the tumor growth was compared to mice treated with albumin alone. Statistically significant 
tumor growth inhibition was seen at 0.3 mg/kg but not at 0.1 mg/kg, and tumor regression was 
seen at 1 mg/kg with complete tumor regression starting at doses of 1.5 mg/kg (2/15 animals), 
2 mg/kg (1/15 animals), 3 mg/kg (5/15 animals), and 5 mg/kg (8/15 animals). In the SNU-16 
gastric cancer model, tumor growth inhibition was seen at 1 mg/kg, while in the MFM-223 
tumor-bearing mice, 5 mg/kg led to tumor stasis.  
All of these tumor models require immunodeficient mice for tumor engraftment. Because these 
mice lack a fully functioning immune system, and because the mouse Fc receptor (the receptor 
on immune cells required for ADCC) has lower affinity for human antibodies than the human 
Fc receptor, ADCC is impaired in these models of FPA144 mediated tumor growth inhibition. 
Thus, in patients with FGFR2b overexpressing tumors, ADCC may further contribute to 
anti-tumor activity in the clinical setting.  

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Figure 1: 
Tumor Growth Inhibition in OCUM-2 Gastric Cancer Cell Line 
 
Mechanistically, FPA144 blocks FGFR2b phosphorylation, downregulates the receptor and 
inhibits downstream signaling. The effect on downstream signaling was measured by examing 
phosphorylation of a protein that is directly phosphorylated by the FGFR2 protein, FGF receptor 
substrate-2 (FRS2). This has been demonstrated in the SNU-16 FGFR2-amplified gastric cancer 
xenograft model. In this experiment, mice were treated twice weekly with 10 mg/kg FPA144. 
When tumors had reached approximately 500 mm3, the animals were sacrificed and protein 
levels in tumors were measured via Western Blotting. FPA144 treatment resulted in decreased 
FGFR phosphorylation, total receptor expression, and phosphorylation of the downstream signal 
transduction molecule, FRS2. 
In contrast to the results with FGFR2-amplified gastric cancer models, FPA144 has minimal 
impact on xenograft models that are not FGFR2 amplified or do not express the FGFR2b protein. 
Mice bearing NCI-87 gastric tumors, which do not express FGFR2b, were dosed 
intraperitoneally twice a week with FPA144 once the tumors reached approximately 100 mm3. 
The tumor growth rate was indistinguishable between animals treated with either FPA144 
(5 mg/kg) or control animals administered albumin.  
These results in models with different FGFR2b/FGFR2 profiles suggest that in the clinical 
setting, patients whose tumors overexpress FGFR2b may be more likely to respond to FPA144, 
highlighting the rationale for selecting patients whose tumors overexpress FGFR2b. 
1.5.1.2 In Vivo ADCC Activity of FPA144  
To understand the contribution of ADCC on FPA144 anti-tumor efficacy, a mutant antibody, 
FPA144 N297Q, which cannot bind Fc receptors, was compared to FPA144 in the syngeneic 

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4T1 model that expresses FGFR2b but to a lesser degree than amplified or overexpressed 
FGFR2b xenografts, such as OCUM-2M or SNU-16 xenograft tumors.  4T1 tumors were grown 
to a volume of approximately 100 mm3, then treated with FPA144, FPA144 N297Q, or the Fc 
fragment of human IgG1 (hFc-IgG1) as control.  FPA144 decreased tumor burden vs hFc-IgG1 
control while FPA144 N297Q showed no effect (Figure 2).  These data support a role for ADCC 
activity through Fc receptor binding as a required mechanism for FPA144 efficacy in a model 
that expresses modest amounts of FGFR2b protein.    
Figure 2: 
FPA144 but Not an ADCC-Deficient FGFR2b Antibody Leads to 
Tumor Suppression in a Syngeneic Tumor Model with Modest 
FGFR2b Expression 
 
 
1.5.1.3 FPA144 Induces Tumor-Specific Innate and Adaptive Immune Profile Changes 
To assess the effects of FPA144 on the tumor microenvironment, changes in infiltrating 
leukocytes post-FPA144 exposure were analyzed in 4T1 tumors.  Once tumors reached 
approximately 150 mm3, mice were treated with FPA144, FPA144 N297Q, or hFc-G1 Control 
on Day 0 and Day 3.  Tumors were harvested for immunofluorescence or FACS analysis 24 
hours after the second dose.  FPA144 treatment leads to a recruitment of NK cells.  In addition, 
PD-L1 expressing cells are increased within the tumor upon FPA144 treatment compared to 
either hFc-G1 control or FPA144N297Q mutant. Furthermore, an increase in CD3-positive T 
cells was observed within tumors treated with FPA144 and was not evident in mice treated with 
hFc-G1 Control or FPA144 N297Q groups, suggesting that these changes in the tumor 
microenvironment are dependent on both FGFR2b and Fc receptor engagement.   
1.5.2 FPA144 Exposure Efficacy Relationships 
To translate the efficacy results in animal models to patients with FGFR2b overexpressing 
gastric cancers, the relationship between FPA144 trough concentrations and efficacy in animal 
models was examined. Intraperitoneal FPA144 doses of 1 mg/kg twice weekly were associated 

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with tumor growth inhibition while greater efficacy depicted by tumor regression was noted at 
doses ≥3 mg/kg. A dose of 1 mg/kg in the mouse xenograft model led to steady state trough 
plasma concentrations of about 1 g/ml, while 3 mg/kg resulted in significant tumor regression 
and trough plasma concentrations of 67–109 g/mL. These data suggest that clinical dosing 
regimens resulting in steady state trough plasma concentrations of at least 1 g/mL may be 
efficacious in patients with FGFR2b-associated gastric cancer.  
1.5.3 Toxicology 
Toxicology studies with FPA144 have been performed in rat and cynomolgus monkey. The 
studies performed have included pilot single dose pharmacokinetic/tolerability and repeat-dose 
studies as well as GLP repeat-dose studies. The longest of these studies involved intravenous 
(IV) administration of 13 weekly doses in rats and monkeys.  
In pilot repeat-dose toxicology studies, rats and cynomolgus monkeys received 4 weekly IV 
doses of FPA144 up to 150 mg/kg. There were no changes in clinical signs and symptoms or 
clinical chemistry. The most significant findings from these repeat-dose pilot studies were 
microscopic findings in corneal epithelium. FPA144-treated animals displayed a dose-dependent 
“thinning” that represents both attenuation and reduction in the number of cells present in the 
corneal epithelium. In addition, microscopic changes in the retinal pigmented epithelium (RPE) 
in rat were noted that included RPE atrophy in one high-dose animal that received 4 weekly 
150 mg/kg doses. Retinal changes were not observed in the 13-week GLP toxicology studies 
with a high dose of 100 mg/kg.  
In the 13-week repeat-dose GLP toxicology studies, FPA144 was administered by IV at dose 
levels of 1, 5, or 100 mg/kg/dose to both rats and monkeys for 13 weekly doses.  
In the rat, FPA144 resulted in adverse findings including: tooth (incisor) abnormalities (clinical, 
macroscopic, and microscopic findings) and body weight loss/lack of weight gain, which were 
most likely secondary to the tooth findings that necessitated early euthanasia at the 
100 mg/kg/dose, ocular findings (ophthalmic and microscopic findings), and macroscopic and/or 
microscopic findings in the Harderian gland (not present in humans) and oral mucosa (hard 
palate) at 5 and 100 mg/kg/dose; and macroscopic and/or microscopic findings in the tongue at 
all dose levels. FGFR2 pathway signaling is known to play a critical role in maintaining the 
health of rat incisors but has not been found to be relevant in human dentition. FPA144-related, 
but non-adverse microscopic findings, were also noted in the mammary gland of animals at all 
dose levels. Administration of FPA144 also resulted in exacerbation of background microscopic 
findings in the prostate gland of males given 1, 5, and 100 mg/kg, the non-glandular stomach of 
animals given 5 and 100 mg/kg/dose, and the lung of animals given 100 mg/kg/dose. With the 
exception of FPA144-related effects on incisor teeth, some degree of recovery up to total 
recovery was evident for all findings at the end of recovery. The absence of FPA144-related 
findings in the eye (ophthalmic or microscopic findings), Harderian gland, mammary gland, and 
prostate gland at the end of the recovery period indicated complete reversibility of the findings in 

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these tissues. Since all findings in the 1 mg/kg/dose group were minimal, without clinical 
consequences, and recoverable, the highest, non-severely toxic dose (HNSTD) in rats was 
determined to be 1 mg/kg/dose when given weekly for 13 weeks. The lowest dose of 
1 mg/kg/dose level was associated with mean Cmax and AUCτ (τ=168 hours) of 27.7 µg/mL and 
789 h*μg/mL, respectively, for combined sexes on Day 85 of the dosing phase.  
In the 13-week repeat-dose GLP toxicology study performed in cynomolgus monkeys, FPA144 
was generally well tolerated. FPA144-related effects were limited to microscopic findings of 
corneal atrophy (slight to moderate) in animals given 5 and 100 mg/kg/dose and mammary gland 
atrophy (moderate to marked severity) in females from all dose groups. These findings in the 
cornea and mammary gland were not associated with clinical sequelae and were not observed at 
the end of the recovery phase, indicating complete recovery. Therefore, based on the lack of 
correlative clinical findings or changes (e.g., ophthalmic findings or clinical observations) and 
the demonstrated reversal during a recovery period, neither finding was considered adverse. The 
100-mg/kg/dose level is considered below the severely toxic dose level in monkeys for the study. 
This represents a >300-fold safety factor over the proposed starting dose of 0.3 mg/kg. The 
highest dose of 100 mg/kg was associated with mean Cmax and AUCτ (τ=168 hours) values of 
3266 µg/mL and 252787 h*μg/mL, respectively, for combined sexes on Day 85 of the dosing 
phase.  
In addition to in vivo toxicology studies, a GLP-compliant tissue cross reactivity study has been 
performed to compare the binding of FPA144 to a panel of 36 tissues from rat, cynomolgus 
monkey, and human. In general the binding pattern of FPA144 was similar among the 3 species 
and agreed with literature reports on the expression of FGFR2b being epithelial-based. 
Further details of the nonclinical program for FPA144 can be found in the Investigator’s 
Brochure (IB), which contains comprehensive information on the investigational product. 
1.6 
Patient Selection 
FPA144 is an antibody designed to recognize the FGFR2b receptor when expressed on tumors. 
FGFR2b may be highly expressed as a result of a molecular aberration of the FGFR2 gene (e.g. 
amplification or translocation) or transcriptional regulation of the FGFR2b isoform.  The current 
hypothesis is that the presence of FGFR2b is an important predictor of patients who may respond 
to FPA144 treatment.  This is based on the preclinical observation that only tumors that 
overexpressed FGFR2b responded to FPA144 treatment in xenograft studies (described in 
Section 1.5.1). For this reason, during Part 2 of the clinical trial, patients will be selected 
according to the extent of FGFR2b overexpression using immunohistochemistry (IHC). In 
addition, clinical outcomes will be explored in FGFR2b-selected gastric and bladder cancer 
patients across a range of IHC-based selection criteria that take into account both the level of 
tumor membrane staining intensity and the percentage of the tumor sample positively stained.  
This will enable a better understanding of the relationship between the extent of FGFR2b 
expression and clinical outcomes in the setting of gastric and bladder cancer. 

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FivePrime has developed an anti-FGFR2b antibody for nonclinical use, whose sensitivity and 
specificity to detect FGFR2b by IHC has been optimized. Evaluation of tumor samples from 125 
gastric cancer patients demonstrates high concordance between FISH positive (FGFR2 
amplified) tumors and FGFR2b IHC score of 3+ (Deshpande 2014).  The relationship between 
FGFR2b expression and molecular aberrations of FGFR2 in other tumor types are not well-
established and are currently under preclinical investigation.  
Thus in Part 1B and Part 2, samples from all patients will be assessed prospectively by IHC to 
determine the expression of FGFR2b. For gastric cancer patients, overexpression of FGFR2b 
will be defined as follows in Part 2: 
• Strong FGFR2b Overexpression: defined as strong membranous staining of at least 10% of 
the tumor cells in a sample (scored as IHC 3+ ≥ 10%) 
The two gastric cancer cohorts enrolling patients with moderate (Cohort D) and low (Cohort E) 
FGFR2b overexpression will be closed. 
For patients with bladder cancer, overexpression of FGFR2b will be defined as follows in Part 2: 
• High FGFR2b Overexpression: defined by the extent of membranous staining in tumor cells 
giving rise to an H-score of ≥ 20 in a sample 
• Low FGFR2b Overexpression: defined by the extent of membranous staining in tumor cells 
giving rise to H-score of  ≥ 10, but  <  20 in a sample 
The H-score is a method of assessing the extent of membranous immunoreactivity and is derived 
using the formula: 3 x the percentage of tumor cells with strong membranous staining (3+)  + 2 x 
the percentage of  tumor cells with moderate membranous staining (2+) + percentage of tumor 
cells with weak membranous staining (1+), giving a range of 0 to 300. 
For other FGFR2b-selected tumor types outside of gastric and bladder cancer, criteria for 
defining FGFR2b overexpression will be determined upon availability of a validated assay for 
each individual tumor type in question.  Criteria for determining FGFR2b overexpression will be 
based on preclinical data and may differ between tumor types. 
For determining FGFR2 gene amplification by FISH, samples submitted for Part1B will be 
analyzed either prospectively or retrospectively, while samples submitted for Part 2 will be 
analyzed retrospectively. For this study, a tumor will be considered FGFR2 gene amplified if the 
ratio of the FGFR2 probe to the centromeric probe (CEN10) is ≥2 in ≥10% of the cells, or there 
are small clusters of amplification in which the ratio cannot be determined (Su 2014).  
A total of 8 patients with gastric cancer with or without FGFR2b overexpressing tumors and with 
or without FGFR2 amplification were enrolled in Part 1B (which is closed to enrollment). Two 
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enroll approximately 20 patients with gastric cancer with strong FGFR2b overexpression. Cohort 
F will enroll up to 30 patients for FGFR2b-selected solid tumors outside of gastric cancer, 
including patients with FGFR2b-selected bladder cancer. Enrollment of additional tumor types in 
this cohort will be contingent on the development of an accompanying validated laboratory test 
for the analysis of FGFR2b overexpression. Cohort B, which was defined as the cohort of 
patients with tumors with FGFR2b overexpression in the absence of FGFR2 amplification, was 
closed for enrollment due to the absence of eligible patients (unpublished internal FivePrime 
data). In addition, Cohort C, planned to enroll patients with gastric cancer without FGFR2b 
overexpression (IHC score of 0), will be closed.  Cohort D, which was defined as the cohort of 
patients with gastric cancer with moderate FGFR2b overexpression, and Cohort E, which was 
defined as the cohort of patients with gastric cancer with low FGFR2b overexpression, will also 
be closed to enrollment. 
1.7 
Clinical Experience with FPA144 
This study was initiated in December 2014 and is the first-in-human assessment of the safety, 
tolerability and PK profile of FPA144.  Dose escalation has been completed in patients with solid 
tumors (Part 1A) and gastric cancer (Part 1B) and the dose expansion phase (Part 2) is currently 
enrolling patients with FGFR2b-selected gastric and bladder cancer in this study.   
Prior to completing Part 1A in November 2015, 19 patients with a variety of solid tumors were 
enrolled.  Of these 19 patients, 18 completed at least one cycle and were evaluable for dose 
limiting toxicity.  FPA144 was well tolerated in doses up to 15 mg/kg in patients with advanced 
solid tumors.  There were no DLTs observed during dose-escalation and a MTD was not 
reached.  Based on an assessment of safety, tolerability, and PK, a RD of 15 mg/kg was selected.  
In parallel to Part 1A, escalating doses of FPA144 were also evaluated in gastric cancer patients 
in Part 1B.  In Part 1B, a total of 8 gastric cancer patients were enrolled.  One patient received 
FPA144 at 3 mg/kg, one patient at 6 mg/kg, and six patients at 10 mg/kg.  Out of the 8 enrolled, 
6 met both the criteria for FGFR2b overexpression by IHC and FGFR2 amplification by FISH.    
As of the latest data cut-off (October 28, 2016), a total of 53 patients across Part 1 (27 patients) 
and Part 2 (26 patients) have enrolled in the study and received at least 1 dose of FPA144. Of the 
53 patients, 35 patients had gastric cancer and 18 patients were identified as having gastric 
cancer that was FGFR2b+ high (IHC 3+ intensity in ≥ 10% of tumor cells). Of those 18 patients, 
6 patients were enrolled in the Part 1B dose escalation and 12 patients in the Part 2 dose 
expansion Cohort A. In addition, 4 patients with gastric cancer with low FGFR2b overexpression 
have been enrolled into Cohort E and 10 patients with gastric cancer (IHC 0 – 2) have been 
enrolled into Cohort C in Part 2. 
Safety and tolerability of FPA144 is supported by experience from a total of 53 patients from the 
Phase 1 study (FPA144-001) who have received at least 1 dose of FPA144. As of 
October 28, 2016, AEs have been reported in 48 of 53 patients (90.5%). Twenty-nine of the 53 

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(54.7%) patients reported an AE that was deemed by the Investigator to be drug related. Of the 
drug-related AEs, none were Grade 4, and 4 events were Grade 3: an infusion reaction in 1 
patient, an aspartate transaminase (AST) elevation and alkaline phosphatase increase in 1 patient, 
nausea in 1 patient, and a transient decrease in neutrophil count in 1 patient which resolved 
without dose interruption or modification. No patient permanently discontinued treatment due to 
a treatment-related AE. Overall, 1 patient discontinued treatment due to an AE of E.Coli sepsis 
that was considered unrelated to study treatment. Treatment-related serious adverse events 
(SAEs) were reported in 2 patients: 1 patient had a Grade 3 infusion reaction and 1 patient had a 
Grade 2 corneal ulcer, both at the 15 mg/kg dose level. The patient with the infusion reaction 
was subsequently able to receive drug after pre-medication, while the patient with the corneal 
ulcer resumed drug after temporarily holding study drug and receiving treatment with antibiotic 
drops. 
As discussed in Section 1.5.3, the pre-clinical animal toxicity studies supported a need for 
comprehensive ophthalmologic examinations. As of the October 28, 2016 cut off, there have 
been no reported adverse events (AEs) of any grade related to the retina. Ocular adverse events 
have been reported in 13 patients. There was 1 reported SAE of Grade 2 corneal ulcer which was 
symptomatic and resolved with topical antibiotic treatment and FPA144 dosing interruption. The 
patient missed 1 dose of FPA144 and was subsequently able to resume dosing. Other treatment-
emergent Grade 2 AEs that fall under the System/Organ/Class of eye disorders were 1 patient 
each with dry eye, increased lacrimation, and blepharitis. The remaining eye disorder AEs were 
all Grade 1. After October 28, 2016, an event of Grade 2 limbic stem cell deficiency was 
reported by the investigator as related to study drug.  The event was unexpected and considered 
medically important per the Sponsor and thus reported.  The main symptom of the limbic stem 
cell deficiency, blurred vision, improved symptomatically after stopping FPA144.  The slit lamp 
exams remain abnormal approximately 2 months after discontinuation of treatment with 
FPA144.   
Evidence of early efficacy in the FGFR2b+ high gastric and gastroesophageal junction (GEJ) 
cancer patient population is supported by a confirmed response rate (per Response Evaluation 
Criteria in Solid Tumors [RECIST] 1.1) of 22.2% in 18 patients in the target patient population 
with a duration of response of 15.9 weeks (95% CI 9.7, 20.0 weeks) and a median progression-
free survival of 14 weeks (95% CI 8.0, 21.6 weeks). 
While the data are preliminary and potentially subject to change, it supports continued 
investigation of FPA144 in FGFR2b-selected gastric cancer.   
In addition, in Part 1A, a response was seen in a 75 year-old man with recurrent urinary bladder 
cancer.  He is being treated with 3 mg/kg FPA144 and has had complete radiographic and 
metabolic regression of the lymph nodes that were his evaluable sites of disease. This is a 
complete response by RECIST v1.1, based on the original size of lymph nodes and subsequent 
response to treatment.  This supports the further exploration of the potential for FPA144 therapy 
in additional cancer settings, including urothelial bladder cancer.  

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1.8 
FPA144 Starting Dose Justification 
A starting dose of 0.3 mg/kg every 2 weeks is planned for this initial single agent Phase 1 trial 
based on several approaches to identifying an appropriate starting dose for this cancer patient 
population:  
1) In mouse pharmacology studies using xenograft responses, the minimal anticipated biologic 
effect level (MABEL) was determined to be 0.3 mg/kg when dosed twice a week. No 
anti-tumor effects were observed at 0.1 mg/kg on the same schedule. Thus, 0.3 mg/kg may 
represent a minimally effective dose in patients.  
2) In the monkey, the no adverse event level (NOAEL) is ≥100 mg/kg in the 13-week GLP 
toxicology program. The monkey is likely the more relevant species based on more similar 
FGFR biology between man and cynomolgus monkey. In rats, many of the observations in 
the toxicology study appear to be a consequence of the documented dependence of rat incisor 
growth on FGFR2 signaling (Lin 2009) that is not relevant for human use. 
3) In the rat study, adverse findings were found at the 1 mg/kg dose level based on the 
observation of minimal, microscopic subepithelial fibrosis in the tongue in 1/30 animals. This 
lesion was deemed only partially reversible in the recovery group based on findings in 
1/10 recovery animals. In the higher dose groups, there was obvious ongoing recovery of 
these findings in the tongue. While this finding could set the NOAEL at <1 mg/kg in the rat, 
FivePrime believes a determination that this lesion was adverse is conservative since these 
lesions are very infrequent and minimal in nature and were not associated with clinical 
sequelae or overt signs of toxicity such as weight loss or reduced food consumption at the 
1 mg/kg dose level. 
4) No lesions in the tongue were observed in the monkey study even at the highest dose level of 
100 mg/kg/dose. 
5) The mRNA expression pattern of FGFR2b in adult human tissues is very low in the tongue. 
6) Such lesions will be monitored in the clinic by oral examination. 
1.9 
Risk-Benefit Assessment 
This overview is not intended to replace the complete information presented in the FPA144 IB. 
Investigators participating in this study are required to review the FPA144 IB before 
administering the antibody.  
FPA144 is being developed for testing in FGFR2b overexpressed tumors given the sensitivity of 
these tumors in nonclinical studies to FPA144 treatment.  This first in human study is currently 
ongoing in the US, Korea, and Taiwan and aims to assess the safety, tolerability and PK profile 
of FPA144. Prior to this study, there have been no other trials of FPA144 or other antibodies 
specifically targeting FGFR2b to provide guidance with regard to potential risks or benefits of 
FPA144. As of the last data cut-off (October 28, 2016), the number and nature of drug-related 
adverse events have been limited, with no patients discontinuing the study for drug-related 

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toxicity (outlined in detail in Section 1.7).  Therefore, specific inhibition of a potentially 
important target in a subset of gastric cancer or other solid tumor patients may be accomplished 
with limited toxicity. 
Ongoing clinical studies with FGFR TKIs may provide additional insight into the safety and anti-
tumor activity associated with targeting the FGF signaling pathway. 
AZD4547 is a selective inhibitor of FGFR 1, 2 and 3 that has been evaluated in an ongoing 
Phase 1 trial with expansion in patients with FGFR 1 or 2 amplified tumors. A dose range of 
20-200 mg bid was evaluated with dose limiting toxicities of increased liver enzymes, stomatitis, 
renal failure, hyperphosphatemia and mucositis. At the expansion dose of 80 mg bid, adverse 
events included hyperphosphatemia, dry skin and mucous membranes, and retinal pigmented 
epithelium (RPE) detachment. A partial response was reported in a non-small cell lung cancer 
patient with FGFR1 amplification (Andre 2013).  
BGJ398 is a pan-FGFR inhibitor at low nanomolar concentrations in early Phase 2 development. 
In Phase 1, the dose-limiting toxicities included Grade 3 aminotransferases and 
hyperphosphatemia and Grade 1 corneal toxicity. At the MTD of 125 mg/day, 
hyperphosphatemia occurred in 78% of patients, stomatitis (37%), alopecia (32%), decreased 
appetite (32%), and fatigue (22%) and were generally mild. Anti-tumor activity, characterized as 
regressions and unconfirmed and confirmed partial responses, was observed in patients with 
activating mutations of FGFR1, FGFR2 and FGFR3 in several different tumor types (Sequist 
2014). 
JNJ-42756493 is also a small molecule pan-FGFR inhibitor that is undergoing evaluation in a 
Phase 1 trial. No dose limiting toxicities were reported across the dose range reported. The most 
common adverse events (AEs) were hyperphosphatemia (57%), asthenia (46%), dry mouth 
(32%), abdominal pain (29%), diarrhea (25%), vomiting (25%), decreased appetite (21%), and 
constipation (21%). Tumor response occurred in a bladder cancer patient with an FGFR3-TACC 
translocation (Dienstmann 2014). 
Hyperphosphatemia is an expected result from inhibition of FGF23, given its role in phosphate 
homeostasis. FGF23 signaling occurs via FGFR1c and FGFR4, neither of which is inhibited by 
FPA144. Hyperphosphatemia has not been seen in toxicology studies with FPA144 treatment of 
up to 13 weeks in duration. Although hyperphosphatemia is not an expected effect of treatment 
with FPA144, serum phosphate levels will be monitored throughout the study. No abnormal 
serum phosphate levels have been reported in any patients who received FPA144 to date. 
Based on the nonclinical studies with FPA144 and the FGFR2 pathway literature, the adverse 
events of interest for safety monitoring include those involving mammary glands, oropharynx 
and ocular toxicity, particularly potential changes in corneal epithelium.  No AEs related to 
mammary glands have been reported thus far on FPA144-001.  As of the data cutoff of October 
28, 2016, 13 patients have reported ocular adverse events.  Only 1 event, a Grade 2 corneal ulcer, 

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required treatment and follow-up from an ophthalmologist. The event was unexpected and 
considered medically important per the Investigator and reported.  The corneal ulcer resolved 
after holding study drug, after which the patient continued FPA144 administration.  After the 
data cutoff, an event of Grade 2 limbic stem cell deficiency was reported by an Investigator as 
related to study drug. The event was unexpected and considered medically important per the 
Sponsor and reported.  The main symptom of the limbic stem cell deficiency, blurred vision, 
improved symptomatically after stopping FPA144.  The slit lamp exams remain abnormal 
approximately 2 months after discontinuation of treatment with FPA144.  In addition, one event 
of grade 1 dry mouth was reported in a patient during cycle 6 of FPA144 given at 3 mg/kg.   
In addition to the study design (dose escalation) and eligibility criteria that exclude patients with 
significant organ dysfunction, the following precautions will be taken. 
Patients found to have certain ocular abnormalities during screening will be excluded. 
Ophthalmology examinations will be performed during the course of the study to monitor 
potential ocular effects. 
Potential oral abnormalities will be evaluated by serial physical examinations. 
Patients will be closely monitored for infusion-related reactions. The infusion length may be 
increased at the Investigator’s discretion based on occurrence of infusion-related reactions, such 
as changes in vital signs, nausea, vomiting, or other constitutional symptoms or allergic reactions 
occurring during infusion or up to 2 hours after cessation of the infusion. For subsequent 
infusions, patients may be pre-medicated with antiemetics, steroids, or antihistamines at the 
discretion of the Investigator. The treatment will be administered according to the institution’s 
standard practice. Epinephrine for subcutaneous injection, diphenhydramine for IV injection, and 
any other medications and resuscitation equipment for emergency management of anaphylactic 
reactions must be available in the room where the infusions are being performed. To date, four 
events of infusion-related reaction have been reported across three patients [one grade 1 event 
reported in a patient receiving FPA144 at 10 mg/kg, one grade 2 event in a patient receiving 10 
mg/kg, and two events (grade 3 and 2) reported in a patient receiving 15 mg/kg] The grade 3 
infusion-related event was unexpected and considered medically important per the Investigator 
and reported. 
In summary, FGF signaling pathways appear to be valid targets for clinical investigation in 
human cancer based on preclinical models as well as Phase 1 clinical investigations 
demonstrating anti-tumor activity with broad FGFR targeted agents. Pre-clinical data support 
specific targeting of FGFR2b in tumors with overexpression of the receptor and non-clinical 
toxicology evaluation has demonstrated that potentially effective doses may be safely 
administered. 

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However, as this is the first clinical study of FPA144, the safety profile in humans has not been 
established, and unanticipated side effects may occur. Cautious dose escalation with close 
monitoring of safety is planned in this study in order to limit the risk to patients. 
2. Study Objectives and Endpoints 
2.1 
Primary Objectives 
• To evaluate the safety profile of escalating doses of FPA144 in patients with advanced solid 
tumors, and to determine the MTD and RD (Part 1A only) 
• To evaluate the safety profile of escalating doses of FPA144 in patients with advanced 
gastric cancer (Part 1B only) 
• To evaluate the safety and tolerability of FPA144 administered intravenously every two 
weeks at the RD in patients with gastric cancer and other solid tumors, including bladder 
cancer (Part 2 only) 
2.2 
Secondary Objectives 
• To characterize the PK profile of single and multiple doses of intravenously administered 
FPA144 in patients with gastric cancer and in other solid tumors, including bladder cancer 
• To evaluate the safety and tolerability of longer term exposure to FPA144 administered 
intravenously every two weeks  
• To evaluate the objective response rate (ORR) in patients with FGFR2b-selected gastric 
cancer and other solid tumors by tumor type, including FGFR2b-selected bladder cancer 
(Part 2 only) 
• To evaluate duration of response in responding patients with FGFR2b-selected gastric cancer 
and other solid tumors by tumor type, including FGFR2b-selected bladder cancer (Part 2 
only) 
• To characterize the pharmacodynamic profile of FPA144 through an analysis of the immune 
cell infiltrate in pre-treatment and on-treatment tumor biopsies by tumor type (Part 2 only) 
2.3 
Exploratory Objectives 
• To evaluate the stable disease rate and duration in patients with FGFR2b-selected gastric 
cancer and other solid tumors by tumor type, including FGFR2b-selected bladder cancer 
(Part 2 only) 
• To assess progression-free survival (PFS) in patients with FGFR2b-selected gastric cancer 
and other solid tumors by tumor type, including FGFR2b-selected bladder cancer (Part 2 
only) 
• To explore the association between extent of FGFR2b overexpression and FGFR2 
amplification (or other molecular aberrations, as applicable) in tumor tissue and clinical 
outcome by tumor type 

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• To characterize the pharmacodynamic profile of FPA144 through an analysis of exploratory 
biomarkers in pre-treatment and on-treatment tumor biopsies by tumor type (Part 2 only) 
2.4 
Primary Study Endpoints 
• The incidence of Grade 3 and Grade 4 adverse events (AEs) and clinical laboratory 
abnormalities defined as dose-limiting toxicities (DLTs) (Part 1 only) 
• The incidence of AEs and clinical laboratory abnormalities (Parts 1B and 2 only) 
2.5 
Secondary Endpoints 
• PK parameters 
• The incidence of AEs, clinical laboratory abnormalities, retinal findings, and ECG 
abnormalities 
• Objective response per RECIST v1.1  
• Duration of response per RECIST v1.1 
• Levels of immune cell infiltrate in pre-treatment and on-treatment tumor biopsy samples  
2.6 
Exploratory Endpoints 
• Stable disease 6 weeks per RECIST v1.1 
• Occurrence of disease progression per RECIST v1.1 or death  
• Identified FGFR2b protein overexpression and FGFR2 amplification (or other molecular 
aberrations, as applicable)  in tumor tissue and response by RECIST v1.1 
• Analysis of exploratory biomarkers in pre-treatment and on-treatment tumor biopsy samples 
3. Overall Design and Plan of the Study 
3.1 
Overview 
This is a three-part, open-label, safety, tolerability, and PK study of FPA144. Patients will be 
enrolled into either Part 1(A or B) or Part 2 of the study, but not both.  
Enrolled patients will be treated in 28-day cycles. Each cycle will consist of 2 doses: on Day 1 
and Day 15.  
3.1.1 Screening Period  
All patients will undergo screening assessments within 4 weeks prior to the first dose of FPA144, 
with the exception that FGFR2b overexpression may be determined by the central laboratory at 
any time prior to enrollment in the study (Part 1B and Part 2 patients). 

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Tumor tissue for FGFR2b expression analysis will be submitted for Part 1A patients if available 
for retrospective analysis, and is mandatory for all patients enrolling in Part 1B and Part 2 of the 
study. In Part 1B, 8 patients with gastric cancer were enrolled, whose tumor tissue was analyzed 
for FGFR2b expression and FGFR2 amplification. In Part 2, approximately 40 patients with 
gastric cancer will be enrolled based on prospective IHC analysis of FGFR2b expression. In 
addition, up to 30 patients with FGFR2b-selected non-gastric solid tumors (including patients 
with FGFR2b-selected bladder cancer for which a validated IHC assay is available) will be 
enrolled based on prospective FGFR2b analysis. Additional non-gastric solid tumor types, aside 
from bladder cancer, can be enrolled only upon availability of an accompanying validated 
laboratory test for the analysis of FGFR2b expression. 
Study-procedure-related AEs that occur after signing of the informed consent form and before 
administration of the first FPA144 dose will be collected during this period. 
3.1.2 Part 1A (Dose Escalation)  
Part 1A is a dose escalation in patients with any solid tumor or lymphoma who, in the opinion of 
the Investigator, may benefit from treatment with FPA144. Dose escalation will continue until 
either the MTD or maximum feasible dose is reached, with a minimum of three patients enrolled 
in each cohort. The anticipated dose levels are: 
• Dose level 1: 
0.3 mg/kg 
• Dose level 2: 
1 mg/kg 
• Dose level 3: 
3 mg/kg 
• Dose level 4: 
6 mg/kg 
• Dose level 5: 
10 mg/kg  
• Dose level 6: 
15 mg/kg 
All dose escalation decisions will be based on assessment of DLTs, overall safety, and 
tolerability and will be made after the last patient enrolled in each cohort has completed the first 
treatment cycle. Dose escalation decisions will be agreed upon between the Investigators and the 
Sponsor’s Medical Monitor. Prior to initiating each new dose level or expanding an existing dose 
level, a safety teleconference will be held wherein Investigators and Sponsor’s Medical Monitor 
review patient data, including, but not limited to, demographics, FPA144 dosing, concomitant 
medications, hematology and serum chemistry, and AEs; and confer and document agreement 
that dose escalation or expanding an existing dose level is considered appropriate. If the Sponsor 
and Investigators collectively agree that following review of safety and pharmacokinetic data, 
that a different dose escalation scheme should be used than the one outlined, this will be 
permitted. Review of safety and PK parameters may inform decisions to add cohorts with 
alternative dose levels or dose regimens (e.g., less frequent dosing) in order to reach an optimal 
target exposure. 

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The following algorithm will be used for dose escalation decisions: 
Table 1: 
Dose-Escalation Considerations 
Number of patients with 
DLT at a Given Dose Level 
Dose Escalation Decision Rule 
0/3 
Escalation will occur to the next higher dose cohort 
1/3 
Enroll three more in same cohort 
≥ 2/3 
Stop enrollment. Enter three more patients at dose level below, if only 3 were 
previously entered 
1/6 
Open next cohort 
≥ 2/6 
Stop enrollment. Enter three more patients at a dose level below, if only 3 were 
previously entered 
The MTD is defined as the highest dose associated with DLTs in less than 33% of patients 
receiving FPA144 administered on Days 1 and 15 of a 28-day cycle. This will normally be the 
dose recommended for further study (RD); however, based on review of safety and PK data, the 
RD could be lower than the MTD. If the MTD is not reached, and the highest evaluated FPA144 
dose is well tolerated, the data will be reviewed to assess whether further dose escalations are 
warranted. The protocol will be amended if additional dose escalation is considered appropriate. 
If the MTD is not reached during Part 1A, or subsequent cycles of treatment in Part 1A provide 
additional insight on the safety profile, an RD may be selected based on overall tolerability, 
safety, and PK. 
If a patient does not receive 2 doses and does not complete the safety and PK assessment in 
Cycle 1 for reasons other than toxicity (e.g., disease progression or withdrawal of consent), then 
an additional patient will be enrolled into the cohort so that the cohort has at least three patients 
evaluable for tolerability through Cycle 1. All such discussions and decisions will be 
documented as part of the dose escalation decision-making process.  
Intra-patient dose escalation above the starting dose for each patient will not be permitted for 
patients in Part 1 (A and B) and Part 2. If a patient’s dose is decreased for a reason that is no 
longer relevant, dose escalation to the originally assigned dose may occur after discussion and 
approval by the Sponsor. 
On completion of Cycle 1 (Safety and PK Assessment Period), Part 1A patients may participate 
in an optional Treatment-Extension Period, which begins on Day 1 of Cycle 2. FPA144 will be 
administered once every 2 weeks until disease progression, unacceptable toxicity, patient or 
physician decision to discontinue, death, or termination of the study (as defined in Section 9.11), 
assuming no limitations with availability of drug supply, or other issues that may preclude the 
Sponsor from providing FPA144. 

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Enrollment into Part 1A is complete.  A total of 19 patients with solid tumors were enrolled into 
Part 1A before its closure in November of 2015. 
3.1.3 Part 1B 
The purpose of Part 1B is to further assess safety and evaluate PK of FPA144 in gastric cancer 
patients, prior to commencing Part 2. Clearance of some antibodies (e.g., bevacizumab and 
trastuzumab) has been shown to be more rapid in gastric cancer patients than in patients with 
other solid tumors. Enrolled patients may be those with FGFR2 amplification or FGFR2b 
overexpression, or gastric cancer patients whose tumors will be tested retrospectively.  
In a staggered fashion with Part 1A dose escalation, patients in Part 1B will be enrolled at one 
dose level below the current highest dose level cohort being studied in Part 1A. For example, if 
the current dose level being studied is at 3 mg/kg for Part 1A, enrollment of Part 1B patients will 
be at the 1 mg/kg dose level. If the current dose level being studied in Part 1A is 6 mg/kg, 
enrollment of Part 1B patients will be at the 3 mg/kg dose level.  
In Part 1B, approximately 3 gastric cancer patients may be enrolled at a dose level, starting one 
dose level below the current Part 1A dose. The Sponsor and Investigators may elect to enroll up 
to an additional 3 patients per dose cohort, based on prospective analysis of tumor tissue with 
FGFR2b overexpression as determined by IHC, in the presence or absence of FGFR2 
amplification, as determined by FISH. Enrollment in Part 1B may not replicate every dose level 
explored in Part 1A. Dose escalation may continue in Part 1B up to 15 mg/kg if no MTD is 
identified in Part 1A.  
Enrollment into Part 1B is complete.  A total of 8 patients with gastric cancer were enrolled into 
Part 1B prior to its closure in November of 2015. 
3.1.4 Part 2 (Dose Expansion) 
Part 2 will evaluate the recommended dose of FPA144 in patients with FGFR2b-selected gastric 
and bladder cancer or with other locally advanced or metastatic solid tumors. Patients will be 
selected for enrollment in Part 2 based on FGFR2b expression, as determined by a validated 
laboratory test for the analysis of FGFR2b expression for each tumor type. 
Enrollment into Part 2 of the study will begin when the MTD or RD has been determined from 
Part 1 of the study. Patients in Part 2 will be assessed for tolerability, safety, and efficacy. 
3.2 
Procedures 
Patients will undergo safety evaluations (DLTs and other AEs, vital signs, ECGs, clinical 
laboratory tests), determination of ECOG performance status [PS], and physical and 
ophthalmologic examinations. Additionally, blood samples will be collected for PK analyses and 
for exploratory PD assessment in all patients.  For all patients enrolled in Part 2, biopsy at the 
primary tumor site or metastatic site is mandatory, as feasible, at Screening (at least 24 hours 

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prior to Cycle 1 Day 1 dosing) and at either Day 15 (within 7 days prior to Cycle 1 Day 15 and 
at least 24 hours prior to dosing) or at Day 29 (within 7 days prior to Cycle 2 Day 1 and at least 
24 hours prior to dosing).  Feasibility at each timepoint will be assessed by the Investigator and 
should include a consideration of patient safety. 
Tumor assessments will be performed at Screening (within 4 weeks prior to first dose), then 
every 6 weeks from the first dose, for 24 weeks, and every 12 weeks thereafter. Once an initial 
complete response (CR) or partial response (PR) is noted, confirmatory scans must be performed 
4–6 weeks later. A tumor assessment should also be performed at the End-of-Study visit unless 
already performed within the previous 6 weeks or if tumor progression was previously 
determined. Response will be evaluated using RECIST v1.1. Subsequent tumor assessments will 
be performed using the same technique used to evaluate baseline tumor measurements. It is 
assumed that tumor assessments will be performed by CT unless clinical circumstances warrant 
the use of another methodology, in which case prior written approval must be obtained from the 
Sponsor.  
Safety will be assessed by monitoring AEs and changes in physical examinations (including oral 
and ophthalmologic assessments), weight, vital signs, 12-lead ECGs, and laboratory 
measurements. Assessment of AEs will follow the guidelines provided in the National Cancer 
Institute (NCI) Common Toxicity Criteria for Adverse Events (CTCAE), version 4.03. Blood 
samples will also be drawn at scheduled time points during the study for determination of drug 
plasma concentration, and anti-drug antibodies (ADAs) (i.e., antibody response to FPA144). 
Patients enrolled in Part 1(A and B) or Part 2 of the study may continue treatment with FPA144 
in 28-day cycles until disease progression, intolerable toxicity, patient or physician decision to 
discontinue, death, or termination of the study. Responding patients who discontinue treatment 
while still in response (CR, PR or SD) should get follow-up scans at 12-week intervals to 
determine the duration of response, unless other anticancer therapy is started.  
All patients should return to the clinic for end-of-treatment (EOT) assessments irrespective of 
whether a patient is withdrawn or withdraws at a planned visit or mid-cycle.  
During Part 1(A and B) and Part 2, AEs will be assessed as outlined in Section 6.2.1.1 below. 
3.2.1 Ophthalmologic Monitoring 
At Screening, prior to Cycle 2 Day 1, and at the EOT visit, each patient will undergo a 
comprehensive ophthalmologic examination, with particular focus on the cornea and retina. 
Comprehensive ophthalmologic exams are to include fundoscopic and slit lamp exam, ocular 
coherence tomography (OCT), visual acuity, and review of ocular and visual symptoms.  
Additionally, slit lamp examinations (with completion of fluorescein staining form) will be 
performed every 6 weeks after Cycle 2 Day 1 (prior to Cycle 3 Day 15, Cycle 5 Day 1, and 
Cycle 6 Day 15), and then every 12 weeks after Cycle 6 Day 15. Slit lamp examinations will 

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continue every 6–8 weeks if a patient has any persistent corneal findings.  OCT is not required at 
these time points. 
The comprehensive ophthalmologic exam will also be repeated at any point if the patient 
develops new visual or ocular symptoms or reports changes in visual acuity.  
3.2.2 Tumor Analysis for Patient Selection 
A third party laboratory in the United States will perform the FGFR2b expression and FGFR2 
amplification analysis using validated IHC and FISH assays. 
Tumor tissue for FGFR2b expression and FGFR2 amplification is optional for patients enrolling 
into Part 1A, and analysis may occur retrospectively. 
Patients in Part 1B and Part 2 of this study must consent to tumor tissue analysis and will have 
their tumor tissue sent to a third party laboratory in the United States for FGFR2b expression and 
FGFR2 amplification analysis. Patients may consent to tumor tissue analysis prior to consenting 
to enrollment in the treatment portion of this study. It is the responsibility of each Investigator to 
obtain an adequate tumor specimen for analysis of FGFR2b overexpression for enrollment into 
Part 1B and 2. Tumor slide or tumor block specimen processing, labeling, and shipping 
instructions are detailed in the Lab Manual that will be distributed with the specimen collection 
kit. For Part 1B, the first 3 gastric cancer patients enrolling into a dose cohort may have their 
tumor tissue analyzed retrospectively, then additional gastric cancer patients may be enrolled 
into that cohort if tumor tissue analysis shows FGFR2b overexpression, in the presence or 
absence of FGFR2 amplification. For Part 2, once tumor specimens are received, analysis will be 
performed as efficiently as possible (typically within 7 calendar days of receipt), and results will 
be communicated back to the Investigator or designee.  
For gastric cancer samples analyzed using IHC, strong FGFR2b overexpression will be defined 
as strong membranous staining of at least 10% of the tumor cells in a sample (scored as IHC 3+ 
≥ 10%).  For bladder cancer samples analyzed using IHC, high FGFR2b overexpression will be 
defined by the extent of membranous staining in tumor cells giving rise to H-score of ≥ 20 in a 
sample. Low FGFR2b overexpression will be defined by the extent of membranous staining in 
tumor cells giving rise to H-score of  ≥ 10, but  <  20 in a sample. For other FGFR2b-selected 
non-gastric tumor types, criteria for defining FGFR2b overexpression will be determined upon 
availability of a validated IHC assay for each additional tumor type in question.   A cohort may 
be closed for at any time according to the Sponsor’s discretion.  
Samples submitted for Part1B will be subjected to both IHC and FISH analysis (prospective or 
retrospectively). For Part 2, all samples from enrolled patients will be subjected to FISH 
retrospectively to determine FGFR2 gene amplification (or other molecular aberrations, as 
relevant). For this study, a tumor will be considered FGFR2 gene amplified if the ratio of the 
FGFR2 probe to the centromeric probe (CEN10) is ≥2 in ≥10% of the cells, or if there are small 
clusters of amplification in which the ratio cannot be determined.  

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3.2.3 Optional Exploratory Archival Tumor Tissue Analysis 
Patients enrolled into the study (Part 1A, Part 1B, or Part 2) may elect to consent to exploratory 
analyses of available archival tissue samples.  This exploratory analysis is distinct from the 
FGFR2b expression and FGFR2 amplification analyses prescribed for patient selection in 
Section 3.2.2, and therefore necessitates the availability of additional archival tissue outside of 
that required for patient selection.  The objective of this optional exploratory tumor tissue 
analysis is to explore the mechanism of action of FPA144 through a more thorough examination 
of FGFR2b signaling and immune status in the tumor.  Specifically, the presence of FGFR2b 
fusions or mutations, the expression levels of FGFR2b and FGFR pathway genes, as well as 
immune cell gene signatures will be explored.  
For patients who consent to the optional exploratory tumor analysis, participation is contingent 
upon the availability of adequate archival tumor specimens (a minimum of 1 paraffin embedded 
block or, in cases where a block is unavailable, approximately 10 unstained slides) and is 
permitted only after discussion and approval by the Sponsor.  Patients may consent to 
exploratory tumor tissue analysis at any time after enrollment onto the treatment portion of the 
study.  Tumor slide or tumor block specimen processing, labeling, and shipping instructions will 
be provided by the Sponsor upon request.  Third party laboratories in the United States will 
perform the exploratory analyses, which will include, but are not limited to multiplex 
immunofluorescence, RNA sequencing, and whole exome Next Generation Sequencing (NGS). 

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3.3 
Study Schema 
Figure 3: 
Study Schema 
 
 
 
 
                         
 
 
 
 
 
 
 
 
 
 
 
 
 
*Part 1A patients only 
                      
 
  
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Part 2 – Dose Expansion  
At Reco mmended Dose 
End of Treat ment 
Visit: 
28 Days after last 
dose of FPA144 
Cohort Dose 
Levels: 
      
0.3 mg/kg* 
1 mg/kg 
3 mg/kg  
6 mg/kg 
10 mg/kg 
15 mg/kg  
 
Part 1A N = 3-6 
per Cohort 
Part 1B N ≈ 3-6 
per Cohort 
Screening Assess ments (Parts 1A, 1B and 2): Within 28 days of first dose FPA144 
Cycle = Day 1 to Day 28 
Dose Escalation and/or 
Reco mmended Dose 
Selection – Based on 
DLTs, overall safety, 
tolerability, PK, and 
estimates of efficacious 
exposures after the last 
subject enrolled in each 
Part 1A cohort has 
completed Cycle 1 
Cycle 1 Visit Days: 
Day 1:  FPA144 dose 
Days 2, 4 and 8:  PK and 
Safety assessments only 
Day 15: FPA144 
Cycle 2 and Beyond 
Visit Days: 
 
Day 1:  FPA144 
 
Day 15: FPA144 
 
Tumor Scans Q6W 
Gastric Cancer Patients  
Cohort A: 
Strong 
FGFR2b 
over- 
expression  
 
N ≈ 20 
Cohort F:  
FGFR2b-
selected 
with a 
validated 
lab test 
N up to 30 
Treat ment per 28 Day Cycles 
Cycle 1 Visit Days: 
Day 1:  FPA144 
Day 8:  PK and Safety    
assessments only 
Day 15: FPA144 
Subsequent Cycles 
Visit Days: 
 
Day 1:  FPA144 
Day 15: FPA144 
 
Tumor Scans Q6W 
End of Treat ment 
Visit: 
28 Days after last 
dose of FPA144 
Non-gastric, Solid Tu mor 
Patients (Including Bladder)  
Part 1A and Part 1B:  
Dose Escalation and Optional Extended Treatment Period  

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3.4 
Rationale for the Study Design 
This is an open-label study to assess the safety, PK, PD, and preliminary efficacy of FPA144 in 
patients with solid tumors. The study will comprise three parts: a dose escalation portion in 
unselected solid tumor patients (Part 1A), a dose escalation portion in patients with gastric 
cancer (Part 1B), and a dose expansion portion in patients with gastric cancer and other FGFR2b-
selected solid tumors, including bladder cancer (Part 2).  
The 3+3 dose escalation design is standard for early stage trials of novel anticancer treatments. 
Dose expansion in gastric cancer and other FGFR2b-selected solid tumor patients will allow for 
a more thorough investigation of the safety, PK, and biological effects of FPA144 in the target 
population for future trials. 
4. Study Eligibility and Withdrawal Criteria 
4.1 
Planned Number of Patients and Study Centers 
Part 1A (Dose Escalation): A total of 19 patients with locally advanced or metastatic solid 
tumors were enrolled.  
Part 1B: A total of 8 patients with gastric cancer with or without FGFR2b overexpression, in the 
presence or absence of FGFR2 amplification, were enrolled.  
Enrollment in Part 1(A and B) is closed as the RD for Part 2 has been determined. 
Part 2 (Dose Expansion): Part 2 is open for enrollment into the following cohorts: 
• Cohort A: Approximately 20 patients with gastric cancer with strong FGFR2b 
overexpression. 
• 
Cohort F: Up to 30 patients with FGFR2b-selected non-gastric solid tumors (including 
bladder cancer for which an accompanying validated IHC assay is available). Enrollment of 
additional tumor types will be contingent on the development of an accompanying validated 
laboratory test for the analysis of FGFR2b overexpression.     
The following cohorts will be closed for enrollment in Part 2: 
• Cohort B: Patients with gastric cancer with FGFR2b overexpression without FGFR2 
amplification 
• Cohort C: Patients with gastric cancer without FGFR2b overexpression  
• 
Cohort D: Patients with gastric cancer with moderate FGFR2b overexpression  
• Cohort E: Patients with gastric cancer with low FGFR2b overexpression  
The study will be conducted at up to 35 investigational centers globally. 
 

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4.2 
Inclusion Criteria for Study Participation 
Patients enrolling into Part 1(A and B) or Part 2 must meet all of the following inclusion criteria: 
1. 
Understand and sign an Institutional Review Board/Independent Ethics Committee-
approved informed consent form prior to any study-specific evaluation 
2. 
Life expectancy of at least 3 months 
3. 
ECOG performance status of 0 to 1 
4. 
Age 18 years at the time the informed consent form is signed except for the patients in 
Taiwan, where the patient’s age must be  20 at the time the informed consent form is 
signed 
5. 
In sexually-active patients (i.e., females of childbearing potential, who have not undergone 
menopause as defined by 12 consecutive months of amenorrhea or had a permanent 
sterilization procedure and males, who have not had a permanent sterilization procedure), 
willingness to use 2 effective methods of contraception, of which one must be a physical 
barrier method (condom, diaphragm, or cervical/vault cap) until 6 months after the last dose 
of FPA144. Other effective forms of contraception are permanent sterilization 
(hysterectomy and/or bilateral oophorectomy, or bilateral tubal ligation with surgery, or 
vasectomy) at least 6 months prior to Screening. Female patients of childbearing potential 
must be on stable oral contraceptive therapy or intrauterine or implant device for at least 90 
days prior to the study, or abstain from sexual intercourse as a way of living  
6. 
Adequate hematological and biological function, confirmed by the following laboratory 
values: 
a) Bone marrow function 
 ANC 1.5 x 109/L 
 Platelets >100 x 109/L  
 Hemoglobin 9 g/dL 
b) Hepatic function 
 AST and ALT 3 x upper limit of normal (ULN); if liver metastases, then 5 x ULN  
 Bilirubin 1.5 x ULN 
c) Renal function  
 Serum creatinine 1.5 x ULN  
7. 
Tumor tissue, must be available for determination of FGFR2b overexpression (optional for 
Part 1A patients) 
4.2.1 Part 1A (Dose-Escalation)  
Patients enrolling in this portion of the study must also meet the following inclusion criteria: 

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8. 
Histologically or cytologically confirmed solid tumor or lymphoma that is locally recurrent 
or metastatic and has progressed following standard treatment or is not appropriate for 
standard treatment 
9. 
Measurable or non-measurable disease  
4.2.2 Part 1B 
Patients enrolling in this portion of the study must also meet the following inclusion criteria: 
10. Histologically documented gastric or gastroesophageal cancer  
11. Tumor tissue for prospective or retrospective determination of FGFR2b expression and 
FGFR2 amplification 
12. Locally recurrent or metastatic disease that has progressed on or following standard 
treatment, or is not a candidate for standard treatment  
13. Measurable disease as defined by RECIST version 1.1 
4.2.3 Part 2 (Dose-Expansion) 
Patients enrolling in this portion of the study must also meet the following inclusion criteria: 
14. The following tumor types, by cohort: 
• Cohort 2A:  Histologically documented gastric or gastroesophageal cancer with 
FGFR2b overexpression, as determined by an accompanying, validated IHC assay 
• Cohort 2F: Histologically or cytologically confirmed bladder cancer (including tumors 
of the renal pelvis, ureters, urinary bladder, or urethra), or other histologically or 
cytologically confirmed solid tumor types with FGFR2b overexpression, as determined 
by an accompanying validated laboratory test for the analysis of FGFR2b expression 
15. Tumor tissue for prospective determination of FGFR2b expression and retrospective 
determination of FGFR2 amplification and other molecular aberrations (as applicable) 
16.  Locally recurrent or metastatic disease that has progressed on or following standard 
treatment, or is not a candidate for standard treatment  
17. Measurable disease as defined by RECIST version 1.1 
 
Exclusion Criteria for Study Participation 
Patients enrolling into Part 1(A and B) or Part 2 will be excluded if any of the following criteria 
apply: 
1. 
Untreated or symptomatic central nervous system (CNS) metastases. Patients with 
asymptomatic CNS metastases are eligible provided they have been clinically stable for at 
least 4 weeks and do not require intervention such as surgery, radiation, or any 
corticosteroid therapy for management of symptoms related to CNS disease 

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2. 
Impaired cardiac function or clinically significant cardiac disease, including either of the 
following: 
a) Unstable angina pectoris ≤6 months prior to first scheduled dose of FPA144 
b) Acute myocardial infarction ≤6 months prior to first scheduled dose of FPA144 
3. 
QTc segment >470 msec  
4. 
Known HIV or AIDS-related illness, or history of chronic hepatitis B or C 
5. 
Treatment with any anticancer therapy or participation in another therapeutic clinical study 
with investigational drugs ≤14 days (28 days for patients in Korea) prior to first dose of 
FPA144 
6. 
Ongoing acute adverse effects from such treatment > NCI CTCAE Grade 1 
7. 
Retinal disease or a history of retinal disease or detachment or, in the ophthalmologist’s 
opinion, at increased risk for retinal detachment  
8. 
Corneal defects, corneal ulcerations, keratitis, keratoconus, history of corneal transplant, or 
other known abnormalities of the cornea that may, in the opinion of an ophthalmologist, 
pose a risk with FPA144 treatment 
9. 
NSCLC patients with exon 19 or 21 EGFR mutation or ALK amplification who have not 
received an EGFR or ALK TKI, respectively (Part 1A only)  
10. Gastric and breast cancer patients with HER2 overexpression who have not received 
anti-HER2 targeted therapy 
11. Major surgical procedures are not allowed ≤28 days prior to FPA144 administration. In all 
cases, the patient must be sufficiently recovered and stable before treatment administration 
12. Females who are pregnant or breastfeeding; women of childbearing potential must not be 
considering getting pregnant during the study 
13. Presence of any serious or unstable concomitant systemic disorder incompatible with the 
clinical study (e.g., substance abuse, psychiatric disturbance, or uncontrolled intercurrent 
illness including active infection, arterial thrombosis, and symptomatic pulmonary 
embolism) 
14.  Presence of any other condition that may increase the risk associated with study 
participation or may interfere with the interpretation of study results, and, in the opinion of 
the Investigator, would make the patient inappropriate for entry into the study 
15. Known allergy or hypersensitivity to components of the FPA144 formulation including 
polysorbate 
16. History of prior malignancy except: 
a) Curatively treated non-melanoma skin cancer or 

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b) Solid tumor treated curatively more than 5 years previously without evidence of 
recurrence or  
c) History of other malignancy that in the Investigator’s opinion would not affect the 
determination of study treatment effect 
4.2.4 Additional Part 1B and Part 2 (Dose Expansion) Exclusion Criteria 
17. Prior treatment with any selective inhibitor (e.g., AZD4547, BGJ398, JNJ-42756493, 
BAY1179470) of the FGF-FGFR pathway 
No waivers of these inclusion or exclusion criteria will be permitted. 
4.3 
Patient Withdrawal and Replacement 
The patient has the right to stop treatment or to withdraw from the study at any time. Patients 
may continue to repeat cycles of FPA144 treatment until at least one of the following criteria 
applies: 
• Consent withdrawal at the patient’s request or at the request of their legally authorized 
representative 
• Progression of patient’s underlying disease. Patients who are receiving clinical benefit 
despite isolated disease progression may continue on study after discussion with Medical 
Monitor 
• Any event that would pose an unacceptable safety risk to the patient 
• An intercurrent illness that would affect assessments of the clinical status to a significant 
degree and require discontinuation of therapy 
• A positive pregnancy test at any time during the study 
• At the specific request of the Sponsor or its authorized representative (for example, if the 
study is terminated for reasons of patient safety) 
The date and reason for cessation of FPA144 will be documented, and the Investigator must 
make every effort to perform the EOT procedures. Patients will be followed for 28 days after the 
last dose of FPA144 for safety; those with ongoing SAEs will be followed until either resolution 
or stabilization.  
Data from patients who discontinue prematurely will remain part of the study database. 
Withdrawn patients at a given dose level may be replaced at the discretion of the Sponsor. 
4.4 
Patient Identification and Enrollment 
Patients must be able to provide written informed consent and meet all inclusion criteria and 
none of the exclusion criteria. No waivers of inclusion or exclusion criteria will be granted by the 
Investigator and Sponsor or its designee for any patient enrolled in the study. Before enrolling a 
patient, all eligibility criteria must be satisfied. Patients who qualify for Part 1A of the study will 

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be enrolled into the first available cohort. In Part 1B, approximately 3 gastric cancer patients 
may be enrolled at each dose level, starting one dose level below the current Part 1A dose. The 
Sponsor and Investigators may elect to enroll up to an additional 3 patients per dose level whose 
tumors overexpress FGFR2b. In Part 2, approximately 20 patients with gastric cancer with strong 
FGFR2b overexpression (IHC 3+ ≥ 10%, Cohort A) will be enrolled. A cohort of patients with 
FGFR2b-selected non-gastric solid tumors will also be enrolled in Part 2 (Cohort F), including 
FGFR2b-selected bladder cancer which has an accompanying validated IHC assay. Patients with 
additional tumor types may be enrolled, contingent on the development of an accompanying 
validated laboratory test for the analysis of FGFR2b expression.  
The Investigator may repeat qualifying lab tests and vitals/ECGs prior to enrollment if a non-
qualifying finding is considered an error or an acute finding is likely to meet eligibility criteria 
on repeat testing. 
4.5 
Pre-Study Screening (Part 1B and Part 2) 
Potential Part 1B and Part 2 patients may elect to consent to tumor tissue analysis at any time 
prior to full assessment of eligibility for enrollment to have their tumor tissue sent to a third party 
laboratory in the United States for FGFR2b expression and FGFR2 amplification analysis. 
Approximately 10 unstained slides or formalin-fixed, paraffin-embedded tumor tissue must be 
available for determination of FGFR2b overexpression. For Part 2, once a potential study 
patient’s tumor is known to overexpress FGFR2b, the patient may be given the opportunity to 
consent to full study participation and will undergo screening to ensure the eligibility criteria are 
met. The tumor tissue analysis may be done at any time prior to enrollment in the study, if 
patients have: 
• Confirmed diagnosis of either gastric or gastroesophageal cancer, bladder cancer or other 
locally advanced or metastatic non-gastric solid tumor with an accompanying validated 
laboratory test for the analysis of FGFR2b expression  
• Age  18 years  
• Performance status (PS) ≤1 on the ECOG Performance Status Scale (see Appendix 3) or 
Investigator’s opinion that PS will have recovered to this level by the time of enrollment 
• The patient will have signed and dated the Institutional Review Board/Ethics Committee-
approved consent document prior to any protocol-specific screening procedures being 
performed 
Note: Patients should not undergo any study-related procedures until full study consent has been 
obtained. 

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5. Study Drug 
5.1 
Identity 
FPA144 drug product is a sterile aqueous solution supplied in single-use glass vials. The 
composition of the drug product contains 20 mg/mL active ingredient, 20 mM L-histidine, 
270 mM sucrose, 0.01% polysorbate 20 at pH 6.0. The container-closure system consists of a 
10 mL Type I borosilicate tubing glass vial, a 20 mm bromobutyl rubber stopper, and a 20 mm 
flip-off seal. The final drug product will be provided as refrigerated liquid 5ml fill in ISO 6R 
vials, which is diluted for administration per instructions provided in a separate Pharmacy 
Manual. 
5.2 
Administration 
FPA144 will be administered only to patients in this study using procedures described in this 
protocol. 
The dose of FPA144 is based on body weight at Cycle 1 Day 1 and adjusted if the patient’s 
weight changes > 10% from Cycle 1 Day 1. 
A pharmacist (or other responsible person) will prepare the solution for administration. After 
calculating the number of vials, based on the patient’s weight, the study drug product will be 
diluted in a 0.9% sodium chloride solution. Prepared FPA144 should be administered 8 hours 
after preparation (ambient temperature). FPA144 will be administered under medical supervision 
over approximately 30-minute IV infusion via a peripheral vein or central venous catheter. The 
IV administration set for FPA144 infusion must contain a 0.22-µm in-line filter or a 0.22-µm 
syringe filter.  
Infusion of FPA144 must be stopped, reduced, interrupted, or discontinued per Section 5.4.6. If a 
patient experiences an infusion reaction, the patient’s vital signs (temperature, blood pressure, 
pulse, and respiration rate) should be monitored during the infusion as well as every 30 minutes 
after the infusion for a minimum of 2 hours and until resolution of the infusion reaction. 
Further instructions on drug preparation and administration are in the Pharmacy Manual. 
5.3 
Packaging, Labeling, and Storage 
Study drug will be packaged as a 5 ml fill in ISO 6R vials by the Sponsor (or designee) 
according to all local legal requirements. Study drug will be labeled in accordance with 
applicable regulatory requirements. 
All study drug supplies must be stored refrigerated at 2°– 8C in accordance with the 
manufacturer’s instructions as provided in the Pharmacy Manual. Until dispensed to patients, the 
study drug will be stored in a securely locked area, accessible to authorized personnel only. 

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5.4 
Starting Dose and Dose Modifications 
The starting dose level of FPA144 and subsequent dose escalations between cohorts in Parts 1A 
and 1B are described in Section 3.1.2. The dose of FPA144 in Part 2, the expansion phase of the 
study, will be determined by evaluation of the data from Part 1A of the study.  
5.4.1 Dose Escalation of FPA144 between Cohorts (Part 1A) 
Dose escalation to the next cohort will only start after the preceding dose cohort has completed 
the DLT period. Twenty-eight days (DLT period) of safety data must be available on at least 
3 safety-evaluable patients prior to a potential dose-escalation decision by the CRC. In the event 
that a patient in a cohort is lacking adequate safety data (e.g., due to early withdrawal from study 
or poor compliance with the protocol), an additional patient will be enrolled to the cohort. 
Dose escalation in each successive dose cohort will proceed in a stepwise fashion. All relevant 
safety information for the first cohort or the preceding dose cohort will be reviewed by the CRC 
(see Section 9.9). 
During dosing, the CRC may decide to stop dosing a patient or the complete cohort for safety 
reasons. 
Dose escalation is planned to continue until dose-limiting toxicities occur in 2 or more patients in 
a cohort. The decision to discontinue dose escalation will be made jointly by the Sponsor and 
Investigator(s) based on reaching MTD or a dose level that achieves target serum concentration 
of FPA144. 
Once the MTD or RD has been reached, 3-10 additional gastric cancer patients may be added 
prior to commencing Part 2, to further explore the safety and PK at this dose level. 
The dose escalation decision rules are summarized in Table 2. 
Table 2: 
Decision Criteria for Escalation 
Number of Patients with DLTs 
Action 
0/3 
Open next cohort 
1/3 
Enroll 3 more in same cohort 
≥2/3 
Stop enrollment. Enter three more patients at dose level below, if only 3 were 
previously entered 
1/6 
Open next cohort 
≥2/6 
Stop enrollment. Enter three more patients at dose level below, if only 3 were 
previously entered 

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5.4.2 Dose Escalation of FPA144 (Part 1B) 
In a staggered fashion with Part 1A dose escalation, patients in Part 1B will be enrolled at one 
dose level below the current highest dose level cohort being studied in Part 1A. For example, if 
the current dose level in Part 1A being studied is 3 mg/kg, enrollment of Part 1B patients will be 
at the 1 mg/kg dose level; if the current dose level being studied in Part 1A is 6 mg/kg, 
enrollment of Part 1B patients will be at the 3 mg/kg dose level. 
During dosing, the CRC may decide to stop dosing a patient or the complete cohort for safety 
reasons. Dose escalation may continue in Part 1B up to 15 mg/kg if no MTD in Part 1A is 
identified.  
5.4.2.1 Maximum Tolerated Dose 
The MTD is defined as the highest dose associated with DLTs in Cycle 1 in less than 33% of 
patients receiving FPA144 administered on Day 1 and Day 15 of a planned 28-day cycle.  
If the MTD is not reached during Part 1A or subsequent cycles of treatment in Part 1 provide 
additional insight regarding the safety profile, an RD may be selected depending on overall 
tolerability, PK, and estimates of efficacious exposures extrapolated from ongoing clinical 
evaluations.  
Alternatively, the protocol may be amended to explore higher dose levels of FPA144. 
5.4.2.2 Toxicity at Lowest Dose Level 
If the MTD is unexpectedly exceeded at the first dose level of FPA144 (0.3 mg/kg), then 
decisions on how to proceed will be based on safety, tolerability, and PK data; and will be agreed 
on between the Investigators and Sponsor’s Medical Monitor. 
5.4.3 Dose Escalation within a Cohort 
In Part 1 (A and B), intra-patient dose escalation will not be permitted.  
In Part 2, patients will be treated at the RD as determined from Part 1 (A and B), and dose 
escalation will not be allowed. 
5.4.4 Dose-Limiting Toxicity 
DLTs are defined as any of the following events that occur during the first cycle of treatment and 
are assessed by the Investigator as related to FPA144. As applicable, events will be classified 
according to the NCI CTCAE (Version 4.03). 
• Absolute neutrophil count (ANC) <0.5 x 109/L >5 days duration or febrile neutropenia (i.e., 
fever >38.3°C with ANC <1.0 x 109/L). 
• Platelets <25 x 109/L or platelets <50 x 109/L with bleeding requiring medical intervention 
• Prolonged (>7 days) Grade 3 thrombocytopenia  

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• Grade 4 anemia (i.e., life-threatening consequences; urgent intervention indicated) 
• Any Grade 2 or greater ophthalmologic AE that does not resolve within 7 days 
• AST/ALT >3 x ULN and concurrent total bilirubin >2 x ULN. 
• Any non-hematological AE CTCAE Grade 3 or greater (except nausea, vomiting, and 
diarrhea if well controlled by systemic medication). Grade 3 or 4 lab values that are not of 
clinical significance per Investigator and Sponsor agreement will not be considered DLTs. 
Part 1A patients who experience a DLT are not required to discontinue study participation in 
FPA144-001. 
5.4.5 Dose Modification Criteria 
Dose reductions may be permitted for patients on treatment beyond the DLT period (in Part 1A) 
or any patient in Parts 1B or 2 per the guidelines outlined in Table 3 and Table 4 for non-ocular 
and ocular-related (defined as related to the cornea and retina) toxicities, respectively. If dose 
reductions or interruptions that do not fall within these guidelines are being considered by the 
Investigator, these will require discussion with and approval by the Sponsor.  
Table 3: 
Dose Modification Guidelines (Non-corneal Toxicity) 
Toxicity Grade 
FPA144 Dose 
Dose Schedule 
1 
Continue 100% of dose 
No delay or missed dose required 
2 
Continue 100% of dose 
No delay or missed dose required 
3 
Continue 75–100% of starting dose 
following recovery to Baseline or Grade 1 
Up to 2 missed doses allowed without 
Sponsor approval to continue 
4 
Continue 50–75% of starting dose 
following recovery to Baseline or Grade 1 
Up to 2 missed doses allowed without 
Sponsor approval to continue 

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Table 4: 
Dose Modification Guidelines for FPA144-related Corneal Toxicity 
FPA144/IP-related 
Toxicity Grade 
Dose Schedule 
New FPA144 Dose 
Grade 1  
No Delay 
100% 
Grade 2 
Delay dosing, see ophthalmologist and 
treat with topical (ophthalmologic) 
antibiotics   
If recovery to baseline or Grade 1 within 
28 days, may resume at 100% dose  
Grade 2 which does 
not return to 
baseline within 28 
days 
Any Grade 3 or 
Grade 4 
Permanently discontinue dosing of 
FPA144 
N/A 
Any patient who reports pain or irritation of the eye or change in vision should be evaluated by 
an ophthalmologist. 
Patients may miss up to 2 consecutive doses (up to 6 weeks between doses) for adverse or other 
events and may resume the study drug if the event returns to Baseline or ≤ Grade 1 within 
6 weeks of treatment interruption. Omission of additional dosing longer than 6 weeks for adverse 
events will necessitate the patient’s discontinuation from the study unless allowed by the 
Sponsor. Patients may miss doses in the course of participation in the study, including missed 
doses for scheduled vacations or other personal reasons as needed, but not more than 2 doses 
sequentially.  
There is a ±3-day window for the scheduled dosing visits. Patients should not have 2 consecutive 
doses of FPA144 within 7 days. The first dose of each cycle is considered Day 1 of each Cycle, 
Cycles will repeat every 28 days unless there is a treatment delay. For patients who cannot 
receive Day 15 treatment by Day 21, patients should skip Day 15 treatment of that cycle and 
resume Day 1 treatment of the next cycle. Patients can have treatment delay of Day 1 of the 
subsequent Cycle as long as the Day 1 treatment is within 6 weeks of the last treatment. 
Intra-patient dose escalation above the starting dose for each patient will not be permitted for 
patients in Part 1 (A and B) and Part 2. If a patient’s dose is decreased for a reason that is no 
longer relevant, dose escalation to the originally assigned dose may occur after discussion and 
approval by the Sponsor. 
5.4.6 Dose Interruptions during Study Drug Infusion 
Infusion of FPA144 must be stopped if any AE ≥ Grade 3 occurs during the infusion. If 
bronchospasm or dyspnea occurs in a patient during infusion, the infusion should be stopped.  

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In addition, at the Investigator’s discretion, the infusion rate may be reduced or stopped if a less 
severe AE (Grade 1 or 2) occurs during the infusion. If a Grade 3 or less severe AE resolves 
within 4 hours, the infusion may be restarted at half the previous rate. If the same AE appears 
again with the same severity at any time during the restarted infusion, the infusion should be 
discontinued, and no further dosing of study drug will occur without consultation with the 
Sponsor or Sponsor’s designee.  
If a patient experiences an infusion reaction, the patient’s vital signs (temperature, blood 
pressure, pulse, and respiration rate) should be monitored during the infusion, as well as every 
30 minutes after the infusion for a minimum of 2 hours and until resolution of the infusion 
reaction. 
5.5 
Blinding and Breaking the Blind 
Blinding and breaking the blind are not applicable as this is an open-label study. 
5.6 
Drug Accountability 
The Investigator or appropriately qualified staff is responsible for maintaining accurate study 
drug accountability records throughout the study. 
The Investigator is responsible for returning all unused study drug to the Sponsor (or designee), 
and must verify that no remaining supplies are in the Investigator’s possession. The study site is 
permitted to destroy used or partially used study drug vials according to the site policy once 
Sponsor approval of their documented destruction procedure has been obtained. On completion 
of the study, the number of FPA144 vials shipped, destroyed, and returned must be reconciled. 
5.7 
Investigational Product Compliance 
Only qualified trained site personnel may administer FPA144. Pharmacy personnel trained in the 
study requirements will monitor compliance with the treatment assignments. FPA144 will be 
infused over approximately 30 minutes via a peripheral vein or central venous catheter by a 
trained healthcare professional. Records of study medication administered (date, time, and dose 
administered relative to time of preparation) will be recorded on the patient’s electronic case 
report form (eCRF). 
5.8 
Concomitant Medication and Treatment 
All concomitant medications including herbal and other non-traditional remedies are to be 
captured on the eCRF. The following parameters will be collected: generic name, route of 
administration, start date, stop date, dosage and frequency, and indication. Any changes in the 
dosage or regimen of a concomitant medication also must be recorded on the eCRF. 
At Screening, patients will be asked what medications they have taken during the previous 
30 days. At each subsequent study visit, patients will be asked about any changes in concomitant 
medications since the previous visit. 

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Throughout the study, Investigators may prescribe any concomitant medications or treatments 
deemed necessary to provide adequate supportive care except for the following: 
• Concomitant anticancer therapy including chemotherapy, radiation therapy, targeted 
therapies, and other experimental drugs. Chronic maintenance therapies, such as LHRH-
modulating agents for breast or prostate cancer, may be continued if the patient has been on 
these agents and 1) continued use is unlikely to result in additional reduction in tumor 
measurements and 2) is considered standard therapy for the patient 
If a patient uses a prohibited medication or undergoes tumor resection, the Sponsor should be 
consulted for a decision on whether the patient should be withdrawn from the study (see 
Section 7.2.11). 
Patients may initiate or continue pain medications as dictated by standard clinical practice. 
Transfusions are permitted as needed. 
No routine premedication will be administered for the initial FPA144 dose. If a patient develops 
nausea, vomiting, or other infusion-related AEs, he/she may be pre-medicated with antiemetics, 
steroids, or antihistamines prior to subsequent infusions of FPA144 at the discretion of the 
Investigator. The treatment will be administered according to the institution’s standard practice, 
and should be captured on the patient’s eCRF. 
6. Parameters and Methods of Assessment 
Safety of FPA144 will be assessed by monitoring AEs and changes in physical examinations 
(including weight and ophthalmologic findings), vital signs, 12-lead ECGs, and clinical 
laboratory measurements. Blood samples will be evaluated for immunogenicity. In Part 2, 
pharmacodynamic assessments will be conducted on tumor biopsy samples acquired at 
Screening and either at 15 days or 29 days on-treatment (see Section 6.4).  Patients in Part 2 
may also have an optional on-treatment biopsy upon documented tumor response and/or optional 
post-treatment biopsy upon documented tumor progression after discussion with the Sponsor. 
6.1 
Tumor Response Parameters 
Tumor assessments will be performed at Screening (within 28 days prior to first dose), then 
every 6 weeks from the first dose, for 24 weeks, and then every 12 weeks thereafter. Tumor 
assessments should be completed within 1 week prior to start of the dose when re-imaging is 
scheduled. All patients should have tumor response parameters assessed at the EOT visit unless a 
tumor assessment has been performed within the previous 6 weeks.  
Response will be evaluated using RECIST v1.1 for measurable disease (required for Part 2). A 
response (complete or partial) to treatment must be confirmed 4–6 weeks later. Subsequent 
tumor assessments will be performed using the same physical, biomarker, or radiological 
parameter(s) used to measure the tumor at baseline.  

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Progressive disease is defined as the appearance of one or more of the following as described in 
RECIST v1.1 (Eisenhauer 2009): 
• For patients with measurable disease, at least a 20% increase in the sum of diameters of 
target lesions, taking as reference the smallest sum on study (this includes the baseline sum if 
that is the smallest on study). In addition to the relative increase of 20%, the sum must also 
demonstrate an absolute increase of at least 5 mm.  
• Unequivocal progression of currently or previously non-measurable lesions  
• The appearance of one or more new lesions 
• Development of clinical signs or symptoms which, in the opinion of the Investigator, indicate 
clinically significant disease progression  
Note: Tumor assessments performed as part of the patient’s standard of care within 28 days 
(4 weeks) of the first dose of FPA144 do not need to be repeated during screening. 
6.2 
Safety Parameters 
6.2.1 Adverse Events  
6.2.1.1 Collection of Adverse Events 
Any new symptoms, injury or worsening of symptoms that occur following signing of the 
informed consent form (ICF) but prior to first infusion (Cycle 1 Day 1) will be considered 
pretreatment events and reported on the Medical History page of the eCRF, unless they directly 
correlate to a study-related procedure. Adverse event reporting will continue until completion of 
the End-of-Treatment visit or until 28 days after the last dose of study drug. Serious AEs 
occurring after the end of the study should be reported to the Sponsor by the Investigator if the 
Investigator considers a causal relationship with the study drug. 
Serious AEs should always be recorded on the AE eCRF page.  
SAEs and new AEs that are not SAEs will be collected until 28 days after the last dose of 
FPA144 (or withdrawal of consent). If a new SAE comes to the attention of the Investigator after 
the final visit, information regarding the SAE should be collected and reported only if assessed 
as possibly or probably related by the Investigator. 
6.2.1.2 Definitions 
An AE is any untoward medical occurrence that occurs in a patient administered a 
pharmaceutical product, and which does not necessarily have to have a causal relationship with 
this treatment. An AE can therefore be any unfavorable and unintended sign (including abnormal 
laboratory finding), symptom, or disease temporally associated with the use of an investigational 
product, whether or not considered related to the product. 

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All AEs including intercurrent illnesses that occur during the study, from the time of study drug 
administration, will be documented on the eCRF. Concomitant illnesses, which existed prior to 
the day of the first study infusion, will not be considered AEs unless they worsen by at least 
1 grade during the treatment period. Intensity (severity) grade will be defined according to the 
NCI-CTCAE, version 4.03. Pre-existing conditions will be recorded on the Medical History 
eCRF. 
A treatment-emergent AE will be defined as an AE that begins or worsens in severity after at 
least 1 dose of study drug has been administered. 
Diagnostic and therapeutic non-invasive and invasive procedures, such as surgery, will not be 
reported as an AE, but the procedure and/or therapeutic treatment should be recorded on the 
appropriate eCRF. The medical condition for which the procedure was performed must be 
reported as an AE (or as part of the patient’s medical history, if appropriate). Disease progression 
is an endpoint and not an AE or SAE. 
6.2.1.3 Assessment of Adverse Events 
Each AE will be assessed by the Investigator with regard to the following categories: 
6.2.1.3.1 Seriousness 
An SAE is defined as any untoward medical occurrence that at any dose: 
• Results in death. Death may occur as a result of the underlying disease process. All events 
other than progression of underlying disease that result in death during the reporting period 
up to 28 days following the last dose of FPA144 must be treated as an SAE and reported as 
such. 
• Is life-threatening (patient is at immediate risk of death from the event as it occurred). 
• Requires inpatient hospitalization (formal admission to a hospital for medical reasons) or 
prolongation of existing hospitalization. 
• Results in persistent or significant disability or incapacity. 
• Is a congenital anomaly or birth defect. 
Important medical events that may not result in death, are not life-threatening, or do not require 
hospitalization may be considered SAEs when, based on appropriate medical judgment, they 
may jeopardize the patient and may require medical or surgical intervention to prevent one of the 
outcomes listed in this definition. Examples of such events are intensive treatment in an 
emergency room or at home for allergic bronchospasm, blood dyscrasias or convulsions that do 
not result in hospitalization, or development of drug dependency or drug abuse. 
Medical and scientific judgment should be exercised in deciding whether a case is serious and 
whether expedited reporting is appropriate. 

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Hospitalization for an event solely related to disease progression is not considered an SAE. 
Hospitalization for an elective or planned procedure to treat a pre-existing condition is not 
considered an SAE unless it results in one of the outcomes listed above. 
6.2.1.3.2 Intensity 
Investigators need to assess the severity of AEs according to the guidelines provided in 
NCI-CTCAE, version 4.03. 
CTCAE v 4.03 Severity Grades are: 
• Grade 1: Mild; asymptomatic or mild symptoms; clinical or diagnostic observations only; 
intervention not indicated; mild AE   
• Grade 2: Moderate; minimal, local or non-invasive intervention indicated; limiting age-
appropriate instrumental activities of daily living; moderate AE 
• Grade 3: Severe or medically significant but non immediately life-threatening; 
hospitalization or prolongation of hospitalization indicated; disabling; limiting 
self-care activities of daily living; severe AE 
• Grade 4: Life-threatening consequences; urgent intervention indicated 
• Grade 5: Fatal AE 
If the AE is not specified in the CTCAE or the study protocol, the grading of severity will be 
assessed as mild (Grade 1), moderate (Grade 2), severe (Grade 3), life-threatening (Grade 4), or 
death due to the AE (Grade 5) using the following definitions: 
• Mild: The patient is aware of the event or symptom, but the event or symptom is easily 
tolerated. 
• Moderate: The patient experiences sufficient discomfort to interfere with or reduce his or her 
usual level of activity. 
• Severe: Significant impairment of functioning: the patient is unable to carry out usual 
activities. 
• Very severe (life-threatening): The patient’s life is at risk from the event. 
6.2.1.3.3 Causality 
The Investigator will assess the causality/relationship between the study drug and the AE and 
record that assessment on the eCRF.  
The most likely cause of an SAE (e.g., disease under treatment, concomitant disease, 
concomitant medication, other) will be indicated on the eCRF with details of the concomitant 
disease or medication or other cause. 
The causal relationship of the AE to study drug will be described in terms of: 

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• Probably related. The AE: 
– Follows a reasonable temporal sequence from administration of the study drug. 
– Could not be reasonably explained by the patient’s clinical state, environmental or toxic 
factors, or other therapies administered to the patient. 
– Disappears or decreases on cessation or reduction in dose of the study drug. 
– Follows a known pattern of response to the study drug. 
– Reappears or worsens on re-challenge. 
• Possibly related. The AE: 
– Follows a reasonable temporal sequence from administration of the study drug 
– Could be reasonably explained by the patient’s clinical state, environmental or toxic 
factors, or other therapies administered to the patient. 
– Follows a known pattern of response to the study drug. 
• Unlikely related. The AE: 
– Does not follow a reasonable temporal sequence from administration of the study drug. 
– Could be reasonably explained by the patient’s clinical state, environmental or toxic 
factors, or other therapies administered to the patient. 
– Does not follow a known pattern of response to the study drug. 
– Does not reappear or worsen on re-challenge. 
• Not related: 
– The AE does not meet the above criteria. 
– There is sufficient information that the etiology of the AE is not related to the study drug. 
– The AE that, after consideration, is clearly due to extraneous causes (diseases, 
environment, etc.), which should be specified, if known. 
The relatedness for SAEs will also be assessed and documented on the SAE form. 
6.2.1.3.4 Outcome and Action Taken 
The Investigator will record the action taken and outcome for each AE according to the 
following criteria: 
• Action Taken 
– None 
– Dose reduced 
– Administration of FPA144 temporarily interrupted 

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– Administration of FPA144 delayed 
– Administration of FPA144 permanently discontinued 
– Unknown 
• Outcome 
– Recovered 
– Recovered with sequelae 
– Ongoing 
– Death 
– Unknown/Lost to follow-up 
6.2.1.4 Recording Adverse Events 
Any new symptoms or injury or worsening of symptoms that occur following signing of the ICF, 
but prior to the first infusion (Cycle 1 Day 1), will be considered pretreatment events and 
reported on the Medical History page of the eCRF, unless they directly correlate to a study-
related procedure. New or worsening symptoms or injury related to study-related procedures that 
occur before Day 1 will be reported as adverse events. Otherwise, adverse event reporting will 
begin on Cycle 1, Day 1 (day of first infusion) and continue until completion of the End-of-
Study visit or until 4 weeks (28 days) after the last dose of study drug. Serious AEs occurring 
after the end of the study should be reported to the Sponsor by the Investigator if the Investigator 
considers there is a causal relationship with the study drug.  
All AEs, regardless of the relationship to study drug, will be recorded on the eCRF. This 
includes potential end-organ toxicity, e.g., renal (proteinuria), hepatic, and cardiovascular 
(increased blood pressure) effects, and effects on wound healing. All AE reports should contain a 
brief description of the event, date and time of onset, date and time of resolution, intensity, 
treatment required, relationship to study drug, action taken with the study drug, outcome, and 
whether the event is classified as serious. 
Abnormal laboratory findings that are not considered clinically significant will be recorded only 
on the laboratory eCRF pages and not on the AE pages. Abnormal laboratory results that are 
considered clinically significant in the Investigator’s opinion are also to be recorded on the AE 
page of the eCRF. Relationship (reasonable causal relationship) to drug therapy and counter 
measures undertaken will be noted on the eCRF. 
6.2.1.5 Reporting Serious Adverse Events 
Any SAEs, whether or not considered related to treatment with FPA144, must be reported, by the 
Investigator, to the Sponsor or Sponsor’s designee within 24 hours of the Investigator becoming 
aware of the event and will be recorded on both the SAE form and AE page of the eCRF. 
Additional SAE information including medications or other therapeutic measures used to treat 

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the event, action taken with the study drug due to the event, and outcome/resolution of the event 
will be recorded on the SAE form. Forms for reporting SAEs will be provided to the study sites. 
A copy of SAE forms must be faxed within 24 hours to the attention of the INC 
Pharmacovigilance Safety Specialist: 
 
INC Research Safety and Pharmacoviligance 
Fax number: 1-877-464-7787 
Email: INCDrugSafety@INCResearch.com 
The Investigator should not wait to receive additional information to fully document the event 
before notification of a SAE, though additional information may be requested. The minimum 
information that is required for an initial SAE report is as follows: 
• Patient number 
• Investigator name and site number 
• Event term 
• Event onset date 
• Serious criteria 
• Relationship to study drug 
As applicable, information from relevant laboratory results, hospital case records, and autopsy 
reports should be obtained. 
The Investigator and Sponsor will review each SAE report and evaluate the seriousness and 
causal relationship of the event to study treatment. In the event of a disagreement about 
causality, the greater level of assessment will be used. In addition, the Sponsor will evaluate the 
expectedness according to the FPA144 Investigator’s Brochure. Based on the Investigator and 
Sponsor’s assessment of the event, a decision will be made concerning the need for further 
action. 
The Sponsor or its designee is responsible for submitting reports of AEs associated with the use 
of the drug that are both serious and unexpected to FDA, according to 21 Code of Federal 
Regulations (CFR) 312.32, and to other regulatory authorities, according to national law and/or 
local regulations. All Investigators participating in ongoing clinical studies with the study 
medication will receive copies of these reports for prompt submission to their Institutional 
Review Board (IRB) or Independent Ethics Committee (IEC).  
The Sponsor or its designee will submit all safety updates and periodic reports to the regulatory 
authorities as required by applicable regulatory requirements. 

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6.2.1.6 Follow-up of Adverse Events 
All AEs experienced by a study patient, irrespective of the suspected causality, will be monitored 
until the event has resolved or stabilized, any abnormal laboratory values have returned to 
baseline or stabilized at a level acceptable to the Investigator and Medical Monitor, there is a 
satisfactory explanation for the changes observed, or the patient is lost to follow-up. 
6.2.1.7 Pregnancy 
Pregnancy tests should be performed for any patient of childbearing potential, as noted in 
Appendix 1. In the event of suspected pregnancy, the pregnancy test should be repeated. Patients 
who become pregnant during the study must discontinue study treatment immediately. 
INC Research Pharmacovigilance must be notified of any patient that becomes pregnant while 
participating in this study. Although pregnancy is not an AE, all pregnancies must be followed to 
conclusion to determine their outcome. It is the responsibility of the Investigator or designee to 
report any pregnancy in a patient that occurs during the study by completing the Pregnancy 
Reporting Form. Please contact the study monitor to receive the Pregnancy Reporting Form on 
learning of a pregnancy. 
Notification of the pregnancy including the anticipated date of birth should be submitted on a 
Pregnancy Reporting Form within 24 hours of awareness and reported using the same procedure 
as described for reporting SAEs (Section 6.2.1.5). If the pregnancy is to be terminated, the 
anticipated date of termination should be provided. 
6.2.1.7.1 Follow-up in the Event of a Pregnancy  
The patient will be asked to provide information on the outcome of the pregnancy, including 
premature termination should the case arise. Spontaneous miscarriages and congenital 
abnormalities will be reported as SAEs. Information on the status of the mother and child will be 
forwarded to INC Research Pharmacovigilance and the Sponsor. Generally, follow-up will be in 
accordance with regulatory guidance and at least 6 to 8 weeks after the estimated delivery date. 
Any premature termination of the pregnancy will be reported as an SAE. 
6.2.2 Laboratory Parameters 
Laboratory assessments will be performed locally at each study site’s laboratory by means of 
their established methods. Before starting the study, the Investigator will provide the Sponsor (or 
designee) with a list of the normal ranges and units of measurement.  
Blood samples should be taken using standard venipuncture techniques. The following 
laboratory parameters (Table 5) will be determined in accordance with the Schedule of 
Assessments (Appendix 1): 

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Table 5: 
Laboratory Assessments 
Hematology: 
 
Complete blood cell (CBC) with differential: 
 
 
white blood cells (WBC) 
platelets  
 
ANC 
hemoglobin 
 
neutrophils (%) 
hematocrit 
 
eosinophils (%) 
red blood cells (RBC) 
 
basophils (%) 
RBC indices: 
 
lymphocytes (%) 
mean corpuscular volume (MCV) 
 
monocytes (%) 
mean corpuscular hemoglobin (MCH) 
 
 
mean corpuscular hemoglobin concentration (MCHC) 
Urinalysis: 
 
Dipstick (appearance, color, pH, specific gravity, ketones, protein, glucose, bilirubin, nitrite, urobilinogen, 
and occult blood) 
 
If dipstick is positive (2+ or greater) for blood or protein, perform a microscopic examination. 
Clinical chemistry: 
 
Albumin                                                                 globulin 
 
alkaline phosphatase 
glucose 
ALT (SGPT) 
lactate dehydrogenase (LDH) 
AST (SGOT) 
phosphate 
blood urea nitrogen (BUN) 
potassium 
calcium 
sodium 
chloride 
total bilirubin 
carbon dioxide (CO2 [bicarbonate]) 
total cholesterol 
creatinine 
total protein 
direct bilirubin  
uric acid 
Other chemistry tests:  
 
Magnesium 
Coagulation: 
 
INR 
 
APTT 
 Serum pregnancy test: 
 
In females of childbearing potential only. 
Tumor Markers 
 
If a patient is being followed with a tumor marker (e.g., CA-125, PSA or other), the tumor marker should be 
obtained prior to the start of each cycle 
Abnormal laboratory results that lead to a change in patient treatment management (e.g., dose 
delay, requirement for additional medication or monitoring) are considered clinically significant 
for the purposes of this study and will be recorded on the AE page of the eCRF. Values meeting 
SAE criteria must be reported as SAEs. 
The Investigator’s determination of relationship of the AE to drug therapy and counter measures 
undertaken will be documented and noted on the eCRF. 

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6.2.3 Vital Signs 
Vital signs will include sitting blood pressure, pulse, and body temperature. All vital signs will 
be obtained after the patient has been resting for at least 5 minutes. Vital signs will be performed 
in accordance with the Schedule of Assessments (Appendix 1). 
6.2.4 Electrocardiograms  
Twelve-lead ECGs will be performed in accordance with the Schedule of Assessments 
(Appendix 1). The Investigator must review the ECG, document this review in the source 
documents, and record any clinically significant changes that occur during the study as an AE in 
the eCRF. 
6.2.5 Pregnancy 
Pregnancy is an exclusion criterion and women of childbearing potential must not be considering 
getting pregnant during the study. A negative serum pregnancy test fewer than 5 days prior to 
first dosing with FPA144 treatment is mandatory. Patients of reproductive potential (males and 
females) must practice 2 effective contraception methods (per Section 4.2) during the study and 
for 6 months after last treatment. 
6.2.6 Physical and Ophthalmologic Examinations 
Physical and ophthalmologic examinations will be performed in accordance with the Schedule of 
Assessments.  
A complete physical examination including height and weight will be performed at Screening. 
Limited physical examinations should be conducted per the Schedule of Assessments 
(Appendix 1) and include examination of the oropharynx. The examination should also include a 
description and measurement of visible or palpable lesions. Examination of the genitourinary and 
gastrointestinal body systems may be excluded.  
Comprehensive ophthalmologic exams will be performed during Screening, prior to Cycle 2 
Day 1, and at the EOT visit. These comprehensive evaluations should include slit-lamp 
examination, optical coherence tomography, visual acuity, determination of intraocular pressure, 
completion of fluorescein staining score form, and review of ocular/visual symptoms. When 
performing the ocular exam by the Ophthalmologist, the following should be noted: 
• IOP can be done by Tonopen or Applanation but should be done before dilation. 
• Confrontation VF is adequate. 
• OCT should include the macula. 
• Corneal staining and scoring should be done before dilation and before the IOP check as both 
may disrupt corneal integrity.  

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Additionally, slit lamp exams (including completion of fluorescein staining form) without OCT 
will be performed by an ophthalmologist every 6 weeks after Cycle 2 Day 1 (prior to Cycle 3 
Day 15, Cycle 5 Day 1, and Cycle 6 Day 15), and every 12 weeks starting at Cycle 6 Day 15. Slit 
lamp exams will continue every 6–8 weeks if a patient has any persistent corneal findings. 
Comprehensive ophthalmologic exams will be performed any other time when the patient 
complains of photophobia, changes in vision, or eye pain, or other ocular or visual complaints.  
6.2.7 Immunogenicity 
Immunogenicity, defined as an immune response to FPA144, will be assessed by measurement 
of total anti-FPA144 antibodies from all patients. Immunogenicity testing will consist of 
screening, confirmation, and titration. Additional characterization of a confirmed anti-FPA144 
antibody response may be considered.  
Samples for immunogenicity assessment will be drawn from each patient at the time points 
outlined in Appendix 1 and Appendix 2). Samples for immunogenicity testing will be collected 
and processed according to the instruction provided in the Laboratory Manual. 
 
6.2.8 Optional Test for FCGR Polymorphisms 
Blood samples will be collected prior to the first dose (Cycle 1 Day 1) from all patients (Part 1 
and Part 2) consenting to test for polymorphisms that frequently occur in Fc-gamma receptors, 
such as FCGR2A and FCGR3A. These genes express Fc gamma receptors on white blood cells 
that are an integral part of the ADCC pathway, which is an anticipated mechanism of action of 
FPA144. The data will be collected for a retrospective analysis at the completion of the study to 
correlate patient response to FPA144. These biomarker tests are considered exploratory.  
6.2.9 Exploratory Blood Based Biomarker Analysis for Patients in Part 2  
Blood (approximately 20 ml) for analyses of circulating tumor DNA and other exploratory 
blood-based biomarkers will be collected from all patients enrolled in Part 2. These samples will 
be collected as outlined in Appendix 2. 
This is an exploratory biomarker study to determine whether patients with FGFR2 molecular 
aberrations (e.g. amplification) can be identified by analyzing tumor DNA present in the 
circulation, and whether response or resistance to FPA144 can be measured.  Additional analyses 
may explore the feasibility of alternative liquid-based biopsy approaches (e.g. using circulating 
tumor cells or exosomal RNA).  Data will be analyzed retrospectively.  
6.2.10 ECOG Performance Status 
ECOG performance status will be assessed at Screening, at Day 1 Cycle 2 and subsequent 
cycles, and at the EOT visit in all patients (Appendix 1). 

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6.3 
Pharmacokinetic Parameters 
Blood samples to determine serum FPA144 concentration will be collected as outlined in 
Appendix 1 and Appendix 2. Patients enrolled in Part 1A and Part 1B will have blood sampling 
during Cycle 1 Days 1, 2, 4, and 8. In addition, blood samples will be collected before and at the 
end of the infusion at Cycle 1 Day 15 and Day 1 of Cycles 2 - 5 and every other Cycle Day 1 
starting from Cycle 5 (i.e. Cycle 5 Day 1, Cycle 7 Day 1, Cycle 9 Day 1, etc.), as well as the End 
of Treatment visit.  
Patients enrolled in Part 2 will have blood sampling during Cycle 1 Days 1 and 8. Blood samples 
will also be collected pre-dose and at the end of each infusion on Cycle 1 Day 15 and Day 1 of 
Cycles 2 – 5 and every other Cycle Day 1 starting from Cycle 5 (i.e. Cycle 5 Day 1, Cycle 7 Day 
1, Cycle 9 Day 1, etc.), as well as the EOT visit. 
These samples will be collected and processed according to the instructions provided in a 
separate Laboratory Manual. 
6.4 
Tumor Biopsy in Part 2 
Biopsy at the primary tumor site or metastatic site is mandatory as feasible at: 
• Screening (at least 24 hours prior to dosing)   
And either:  
• 15 days on-treatment (within 7 days prior to Cycle 1 Day 15 and at least 24 hours prior to 
dosing)  
Or  
• 29 days on-treatment (within 7 days prior to Cycle 2 Day 1 and at least 24 hours prior to 
dosing).   
Feasibility at each timepoint will be determined by the Investigator and should include a 
consideration of patient safety. If the Investigator assesses that a biopsy is not feasible, then this 
determination must be recorded in the source documents. Patients may also have on-treatment 
biopsy upon documented tumor response and post-treatment biopsy upon documented tumor 
progression after discussion with the Sponsor.   
Biopsied lesions may become inflamed, bleed, or change dimensions, which could result in 
inaccurate tumor measurements. Therefore, it is strongly recommended not to use the biopsied 
lesion as a target lesion when assessing the response by RECIST v 1.1 criteria. 

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These biopsy samples should be excisional, incisional or core needle. Fine needle aspirates or 
other cytology specimens are insufficient for downstream biomarker analyses. Tumor tissue 
specimens in the form of a paraffin embedded block or unstained slides will be submitted for 
central IHC assessment.  
Tumor biopsy samples are being collected to evaluate the pharmacodynamic effect of FPA144 
on the tumor microenvironment. These samples may also undergo RNA sequencing to determine 
the effect of FPA144 on gene expression pathways as well as identified gene expression 
signatures associated with response or resistance to response. These analyses may help predict 
future response to treatment.  
These biopsy samples will be obtained before treatment and on-treatment to examine immune 
infiltrates and expression of selected tumor markers. An optional biopsy may be obtained of 
tumors that have responded and/or progressed on or after treatment to understand mechanisms of 
resistance. 
Tumor biopsy samples may be assessed for the expression of immune or disease-related genes 
and/or proteins, as well as for the presence of immune cell populations using a variety of 
methodologies including but not limited to IHC, qRT-PCR, genetic mutation detection, and 
fluorescent in situ hybridization (FISH). Other methods of tumor biomarker expression are being 
evaluated.  

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7. Study Conduct 
7.1 
Overview of Patient Assessments 
After an initial screening period of up to 28 days (4 weeks), patients will be treated with FPA144 
every 2 weeks (± 3 days) in 28-day cycles, and FPA144 will be administered as a 30-minute 
infusion. All time points of assessments should be completed in the timeframe stated. 
Assessments performed prior to the patient signing the informed consent are acceptable only if 
confirmed to have been standard of care.  
The schedule of detailed patient assessments is shown in Appendix 1 and Appendix 2. 
Instructions for the sampling and processing of PK and immunogenicity data are described in a 
separate, protocol-specific laboratory manual.  
7.2 
Study Assessments and Procedures by Visit 
7.2.1 Pre-Study Period (Parts 1B and 2) 
Study eligibility for Part 1B and Part 2 includes analysis of either archived or recently obtained 
tumor tissue for evaluation of FGFR2b overexpression and FGFR2 amplification. Potential 
patients may elect to consent for this tumor tissue analysis by a third party laboratory in the 
United States at any time prior to enrollment into the study.  
In Part 1B, approximately 3 gastric cancer patients may be enrolled at each dose level, whose 
tumor tissue may be tested retrospectively. The Sponsor and Investigators may elect to enroll up 
to an additional 3 patients per dose level whose tumors overexpress FGFR2b.  
In Part 2, those patients whose tumors are documented to have FGFR2b overexpression will 
subsequently be given the opportunity to consent to full study participation, and will undergo in-
clinic screening to ensure the eligibility criteria are met. 
7.2.2 Screening Period (Day –28 to Day 0) 
Written, signed informed consent must be collected prior to any study-specific procedures. 
Patients who have fully consented to participation in the study will undergo screening 
assessments within 28 days (4 weeks) prior to administration of the first infusion of FPA144 
(unless otherwise stated). To determine if the patient meets all the inclusion criteria and does not 
violate the exclusion criteria, the following procedures will be performed: 
• Tumor tissue for central FGFR2b expression testing 
 
Note: This requirement is mandatory for Part 1B and Part 2 of the study, and may be done at 
any time prior to enrollment. Tumor tissue analysis for Part 1B may be done prospectively or 
retrospectively. Tumor tissue analysis will be encouraged for patients enrolled in Part 1A, for 
retrospective analysis. FGFR2 amplification testing may be performed either prospectively 
or retrospectively for patients in Part 1B, but will only be performed retrospectively for 
patients enrolled in Part 2. 
• Complete medical and disease history  

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• Demographic and baseline characteristics 
• Vital signs (sitting blood pressure, pulse, respiration, and body temperature [C] after 
5 minutes rest) 
• Complete physical examination, including weight, and height 
• Comprehensive ophthalmologic exams including fundoscopic and slit lamp exam, ocular 
coherence tomography (OCT), determination of intraocular pressure, visual acuity, 
completion of fluorescein staining score form, and review of ocular/visual symptoms. 
• ECOG performance status evaluation  
• 12-lead ECG (required at screening, and if clinically indicated during the study) 
• Document prior and concurrent medications 
• Hematology (hemoglobin, hematocrit, white blood cell [WBC] and differential [with ANC], 
and platelet count). Blood will be analyzed by a local laboratory 
• Serum chemistry (total protein, albumin, creatinine, BUN or urea, uric acid, total bilirubin, 
alkaline phosphatase (ALP), ALT, AST, lactate dehydrogenase (LDH), glucose, globulin, 
phosphate, calcium, sodium, potassium, magnesium, chloride, carbon dioxide (CO2 
[bicarbonate]), total cholesterol, creatinine, and direct bilirubin. Blood will be analyzed by a 
local laboratory 
• Urinalysis (includes dipstick for protein, glucose, blood, pH, and ketones)  
• Serum pregnancy test (beta-human chorionic gonadotropin [-HCG]), 5 days prior to 
Cycle 1 Day 1, for women of childbearing potential  
• Radiological imaging/tumor assessments: Tumor assessments should consist of clinical 
examination and appropriate imaging techniques (preferably CT scans with appropriate slice 
thickness per RECIST v1.1); other assessments (MRI, X-ray, PET, and ultrasound) may be 
performed if required. The same methods used to detect lesions at baseline are to be used to 
follow the same lesions throughout the clinical study. CT assessments are to be performed 
within 28 days prior to the first infusion of FPA144. Radiological assessments performed as 
part of the patient’s standard of care within 28 days of the first study infusion do not need to 
be repeated if the documentation of results is provided and is adequate for an assessment. 
• Mandatory as feasible biopsy collection (at least 24 hours prior to dosing) for patients 
enrolled in Part 2 
Note: A protocol-specific Patient Enrollment Number Assignment Form must be submitted 
to the Sponsor (or designee) to confirm patient eligibility prior to initiation of study treatment 
and assignment of a patient enrollment number.  
7.2.3 Treatment Allocation (Dosing Assignment) 
This is an open-label study. Enrollment numbers will be faxed or emailed to the Investigator (or 
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within a specific cohort and will determine to which treatment cohort newly enrolled patients 
will be assigned. 
7.2.4 Cycle 1, Day 1 (Parts 1A, 1B, and 2) 
The following procedures will be performed: 
• Prior to FPA144 infusion (within  72 hours unless otherwise stated): 
– Verification of eligibility 
– Update medical and disease history to capture any changes from screening 
– AE reporting, if applicable, and review of concomitant medications 
– Vital signs (sitting blood pressure, pulse, respiration, and body temperature [C] after 
5 minutes rest) 
– Limited physical examination including weight and oral exam 
– Clinical safety labs (hematology results must be available prior to dosing)  
– Serum ß-hCG (evaluated by local laboratories) will be performed 5 days prior to the 
first dose of FPA144 only on women of childbearing potential   
– Urinalysis 
– Blood sample for immunogenicity testing 4 hours prior to dosing of FPA144 
– Blood sample for PK 4 hours prior to dosing of FPA144 
– Optional blood sample for FCGR polymorphism testing 
– Blood-based biomarker sample collection in all patients enrolled in Part 2 as outlined in 
Appendix 2  
• Study drug administration: 
– Administer FPA144, by IV infusion over approximately 30 minutes  
• Post FPA144 administration: 
– Post-dose Vital signs (sitting heart rate, blood pressure, respiration, and body temperature 
[C] after 5 minutes rest) at the following time points relative to the start of the infusion: 
 0.5 hours (within 5 minutes after end of infusion), + 1 hour (±5 minutes), 2 hours 
(±5 minutes), and 4 hours (±5 minutes) from start of infusion.  
– AE reporting and review of concomitant medications, if applicable 
– PK sample collection, at the following time points relative to the start of the infusion:  
 Part 1A: 0.5 hours (within 5 minutes after end of infusion), + 1 hour (±5 minutes), 
2 hours (±5 minutes), 4 hours (±5 minutes), and 8 hours (±5 minutes) from start of 
infusion. 

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 Part 1B: 0.5 hours (within 5 minutes after end of infusion), + 1 hour (±5 minutes), 
and 4 hours (±5 minutes) from start of infusion. 
 Part 2: PK sample collection at 0.5 hours (within 5 minutes after end of infusion), + 
1 hour (±5 minutes), and 4 hours (±5 minutes) from start of infusion as outlined in 
Appendix 2. 
7.2.5 Cycle 1, Day 2 (Part 1A and B only) 
• Vital signs (sitting heart rate, blood pressure, respiration and body temperature) 
• PK sample collection at the following time point: 
– 24 hours (±1 hour) from start of infusion on Day 1 
• AE reporting, if applicable, and review of concomitant medications 
7.2.6 Cycle 1, Day 4 (Part 1A and 1B only) 
• Vital signs (sitting heart rate, blood pressure, respiration and body temperature) 
• PK sample collection at the following time point: 
– 72 hours (+24 hour) from start of infusion on Day 1 
• AE reporting, if applicable, and review of concomitant medications  
7.2.7  Cycle 1, Day 8 (Parts 1A, 1B and 2)  
Study patients will return to the study center on Day 8 (± 2 days). No treatment will be 
administered.  
The following assessments will be completed: 
• Vital signs (sitting blood pressure, pulse, respiration, and body temperature [C] after 
5 minutes rest) 
• Limited physical examination including oral exam 
• Clinical safety labs  
• Blood sample for PK  
• AE reporting, if applicable, and review of concomitant medications  
7.2.8 Cycle 1, Day 15 (Parts 1A, B, and 2)  
Study patients will return to the study center on Day 15 and the following assessments will be 
completed.  
• Prior to FPA144 infusion (within  72 hours unless otherwise stated): 
– Vital signs (sitting blood pressure, heart rate, respiration, and body temperature [C] after 
5 minutes rest) 

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– Limited physical examination including weight and oral exam 
– Clinical safety labs (hematology results must be available prior to dosing)  
– Blood sample for PK, 4 hours prior to dosing of FPA144 
– AE reporting, if applicable, and review of concomitant medications  
– Mandatory as feasible biopsy collection for patients enrolled in Part 2 only, at either:  
– 15 days on-treatment (within 7 days prior to Cycle 1 Day 15 and at least 24 hour prior to 
dosing)  
Or  
– 29 days on-treatment (within 7 days prior to Cycle 2 Day 1 and at least 24 hour prior to 
dosing). 
• Study drug administration: 
– Administer FPA144, by IV infusion over 30 minutes  
• Post FPA144 administration: 
– PK sample collection at 0.5 hours (within 5 minutes after end of infusion) 
– Post-dose Vital signs (sitting heart rate, blood pressure, respiration, and body temperature 
[C] after 5 minutes rest) at the following time points relative to the start of the infusion: 
 0.5 hours (within 5 minutes after end of infusion) and + 1 hour (±5 minutes)  
– AE reporting, if applicable, and review of concomitant medications 
7.2.9 End of Cycle 1 (Part 1A only) 
For Part 1A patients, if at the end of Cycle 1 the Investigator determines that the patient may 
benefit from continued dosing with FPA144, entry into the Extended Treatment Period may be 
offered.  
• If the patient is continuing onto the Extended Treatment Period (Cycle 2), proceed to 
procedures outlined in Section 7.2.10. 
• If the patient does not qualify to receive further doses of FPA144, the patient will undergo 
procedures in an EOT visit (see Section 7.2.11).  
7.2.10 Part 1A Extended Treatment/Part 1B and Part 2 Cycle 2 and Subsequent Cycles 
Part 1A Extended Treatment may begin on Cycle 2, Day 1. Dosing will be discontinued if the 
patient experiences either disease progression or unacceptable toxicity.  
At each infusion visit, patients are to remain at the study site after each administration of 
FPA144 until completion of all post-dose assessments for safety monitoring. The following 
assessments will be performed at each visit unless otherwise noted: 

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7.2.10.1 Cycle 2 and Subsequent Cycles, Day 1 and Day 15 (Parts 1A, 1B, and 2)  
• Prior to each infusion of study drug:  
– Vital signs (sitting heart rate, blood pressure, respiration, and body temperature [C] after 
5 minutes rest) 
– Limited physical examination including oral exam 
– Weight on Day 1 of each Cycle (after Cycle 1, dose will be recalculated only if weight 
has changed >10% from Cycle 1, Day 1) 
– Comprehensive ophthalmologic exams including fundoscopic and slit lamp exam, ocular 
coherence tomography (OCT), visual acuity, completion of fluorescein staining score 
form, determination of intraocular pressure, and review of ocular/visual symptoms prior 
to Cycle 2 Day 1only 
– Slit lamp exams (including completion of fluorescein staining form) without OCT every 
6 weeks through Cycle 6, Day 15 (prior to Cycle 3, Day 15; Cycle 5, Day 1; Cycle 6, Day 
15), and every 12 weeks starting at Cycle 6, Day 15. Continue every 6–8 weeks if the 
patient has any persistent corneal findings 
Note: Refer for additional comprehensive ophthalmologic evaluation at any time if 
patient complains of photophobia, vision changes, or eye pain 
– ECOG performance status evaluation (Cycle 2 Day 1, then Day 1 of every subsequent 
Cycle) 
– Clinical safety labs (hematology results must be obtained prior to dosing) 
– Blood sample for PK (4 hours pre-dose)  
– Day 1 Cycles 2-5 and starting at Cycle 5, blood samples will only be collected every 
other Cycle on Day 1 (Cycle 5, 7, and 9 etc…) 
– Blood sample for immunogenicity (4 hours pre-dose).  
– Day 1 Cycles 2-5 and starting at Cycle 5, blood samples will only be collected on Day 1 
of every other Cycle (Cycles 5, 7, and 9 etc…) 
– Urinalysis Day 1 of each Cycle  
– Tumor assessment using the same physical or radiologic parameter(s) used to evaluate 
baseline tumor measurements are to be done every 6 weeks from the first dose for 24 
weeks (within 7 days prior to the start of Cycle 2 Day 15, Cycle 4 Day 1, Cycle 5 Day 15, 
Cycle 7 Day 1), then approximately every 12 weeks thereafter. 
– Mandatory as feasible biopsy collection for patients enrolled in Part 2 only, at either:  
– 15 days on-treatment (within 7 days prior to Cycle 1 Day 15 and at least 24 hour prior to 
dosing)  
Or  

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– 29 days on-treatment (within 7 days prior to Cycle 2 Day 1 and at least 24 hour prior to 
dosing). 
– Optional biopsy (after discussion with the Sponsor) for consenting patients enrolled in 
Part 2 who responded to treatment (within 14 days post tumor assessment) 
– Optional exploratory archival tumor tissue analysis for consenting patients enrolled in 
Part 2  
– Blood-based biomarker sample collection every 6 weeks from the first dose for 24 weeks 
(prior to Cycle 2 Day 15, Cycle 4 Day 1, Cycle 5 Day 15, Cycle 7 Day 1), and then 
approximately every 12 weeks thereafter from patients enrolled in Part 2 as outlined in 
Appendix 2 
– AE reporting, if applicable, and review of concomitant medications 
• Study drug administration: 
– Administer FPA144, by IV infusion over 30 minutes  
• Post study drug administration: 
– Post-dose vital signs (sitting heart rate, blood pressure, respiration, and body temperature 
[C] after 5 minutes rest) at the following time points relative to the start of the infusion: 
 0.5 hours (after the end of infusion) and +1 hour (±5 minutes)  
– PK sample collection at 0.5 hours (from start of infusion, within 5 minutes after end of 
infusion)  
 Day 1 Cycles 2-5 and starting at Cycle 5, blood samples will only be collected on 
Day 1 of every other Cycle (Cycle 5, 7, and 9 etc…) 
– AE reporting, if applicable, and review of concomitant medication  
7.2.11 End-of-Treatment Visit or Early Termination 
Patients will return to the study center approximately 28 ( 3) days after their last infusion of 
FPA144, or in the event a patient discontinues prematurely from the study.  
The following assessments will be performed at the EOT visit: 
• Vital signs (sitting pulse, blood pressure, respiration, and body temperature [C] after 
5 minutes rest) 
• 12-lead ECG 
• Limited physical examination including oral exam  
• ECOG performance status evaluation 

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• Comprehensive ophthalmologic exams including fundoscopic and slit lamp exam, ocular 
coherence tomography (OCT), visual acuity, intraocular pressure, completion of fluorescein 
staining score form, and review of ocular/visual symptoms if at least 6 weeks since the 
previous ophthalmologic exams. 
• Clinical safety labs  
• Blood sample for PK 
• Blood sample for immunogenicity 
• Serum ß-hCG (evaluated by local laboratories) in women of child-bearing potential 
• Blood- based biomarker sample collection from patients enrolled in Part 2 as outlined in 
Appendix 2 
• Urinalysis 
• Tumor assessment using the same physical or radiologic parameter used to evaluate baseline 
tumor measurements. (This scan can be omitted if the last scan was performed <6 weeks 
prior to EOT visit or if tumor progression was previously determined.  
• Optional biopsy (after discussion with the Sponsor) for consenting patients enrolled in Part 2 
who progressed, (28 [7] days, post last infusion of FPA144 visit only) 
• AE reporting, if applicable, and review of concomitant medications 
8. Statistical Methods 
Before database lock, a separate statistical analysis plan (SAP) will be finalized, providing 
detailed methods for the analyses outlined below.  
Any deviations from the planned analyses will be described and justified in the final integrated 
study report. 
8.1 
Study Patients 
8.1.1 Disposition of Patients 
The number and percentage of patients entering and completing each phase (e.g., Screening, 
Cycle 1, and Extended Treatment Period) of the study will be presented. Reasons for withdrawal 
will also be summarized. 
8.1.2 Protocol Deviations 
A summary of the number and percentage of patients with major protocol deviations by type of 
deviation will be provided. Deviations will be defined in the SAP prior to database lock. 
8.1.3 Analysis Populations 
The following analysis populations are defined for the study: 

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• Safety Population—all patients who have received any portion of at least one dose of 
FPA144.  
• DLT-Evaluable Population—all patients enrolled into Part 1A of the study who received at 
least 2 doses of FPA144 and completed Cycle 1 of treatment, or who experienced a DLT in 
Cycle 1.  
• PK-Evaluable Population—all patients who have received at least one dose of FPA144 and 
have had adequate PK assessments drawn for determination of the PK profile. Adequacy will 
be determined on a case-by-case basis and will be assessed prior to analysis of the blood 
samples.  
• Efficacy-Evaluable Population—all patients who met eligibility criteria, received at least 
1 dose of FPA144, have measurable tumor lesions at baseline, and have at least 
1 post-Baseline disease assessment. 
8.2 
General Considerations 
Data collected in this study will be presented using summary tables and patient data listings. 
Continuous variables will be summarized using descriptive statistics, specifically the mean, 
median, standard deviation (SD), minimum, and maximum. Categorical variables will be 
summarized by frequencies and percentages. 
The statistical and analytical plans presented below summarize the more complete plans to be 
detailed in the statistical analysis plan (SAP). A change to the data analysis methods described in 
the protocol will require a protocol amendment only if it alters a principal feature of the protocol. 
The SAP will be finalized prior to database lock. Any changes to the methods described in the 
final SAP will be described and justified in the clinical study report. 
8.3 
Demographics, Baseline Characteristics, and Concomitant Medications 
Demographic data, medical history, concomitant disease, and concomitant medication will be 
summarized by cohort and overall. To determine whether the criteria for study conduct are met, 
corresponding tables and listings will be provided. These will include a description of patients 
who did not meet the eligibility criteria, an assessment of protocol violations, study drug 
accountability, and other data that may impact the general conduct of the study. 
Baseline characteristics will be summarized for the safety population. Patients who died or 
withdrew before treatment started or do not complete the required safety observations will be 
described and evaluated separately. 
8.4 
Treatment Compliance 
Treatment administration will be summarized by cohort including dose administration, dose 
modifications or delays, cumulative dose, average dose, number of infusions, and the duration of 
therapy. 

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8.5 
Analyses of Tumor Response 
Patients will be classified according to their best overall tumor response (complete response 
[CR], partial response [PR], stable disease [SD], or progressive disease [PD]). Frequencies, 
proportions, and exact 95% CI of patients, when appropriate, stratified by their best overall 
tumor response will be calculated. Patients with a best overall tumor response of CR or PR with 
duration of at least 4 weeks (28 days) will be further classified as having an objective tumor 
response. Listing of patients with an objective tumor response will be presented. 
Duration of response will be calculated as the number of days from the first documentation of 
overall response (CR or PR) to the first documentation of disease progression or death, 
whichever comes first. Patients who are alive and progression-free at the time of data analysis 
will be censored at the time of their last assessment for tumor response. 
Duration of stable disease will be calculated from Cycle 1, Day 1.  
8.6 
Safety Analyses 
Safety analyses will be performed separately within both parts of the study and for all patients 
combined. Data from all patients that receive any portion of at least 1 dose of FPA144 will be 
included in the safety analyses. AEs, clinical laboratory information, vital signs, ECOG 
performance status, body weight, ECGs, results of ophthalmology/retinal exams, and 
concomitant medications/procedures will be tabulated and summarized.  
AEs will be summarized overall and with separate summaries for serious AEs, AEs leading to 
discontinuation, AEs leading to death, and NCI CTCAE Version 4.03 Grade 3 or higher AEs.  
Body weight and vital signs will be summarized descriptively (N, mean, standard deviation, 
median, minimum, and maximum). ECOG will be summarized categorically and descriptively.  
Shift tables displaying patient counts and percentages classified by baseline grade and maximum 
grade on treatment will be provided for laboratory data by cohort and overall. A marked 
laboratory change is defined as a shift from a baseline Grade 0 to Grade 3 (non-hematologic) or 
Grade 4 (hematologic) on treatment, or a shift from a baseline Grade 1 to Grade 4 on treatment. 
The number and percentage of patients with marked laboratory changes will be tabulated by 
cohort and overall. 
8.7 
Efficacy Analysis 
Efficacy analyses will be descriptive. The overall response rate will be summarized with 
frequencies and percentages. The duration of response for CR and PR patients will be 
summarized with descriptive statistics (N, mean, standard deviation, median, minimum, and 
maximum) as well as categorically. Response and duration of response will be determined using 
RECIST v1.1. Kaplan-Meier methodology will be used to summarize duration of response and 
PFS. 

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8.8 
Pharmacokinetic Analyses 
Individual and mean (±SD) serum FPA144 concentration-time data will be tabulated and plotted 
by dose level. FPA144 PK parameters will be estimated from the serum study drug 
concentration-time data using a non-compartmental analysis (NCA) method with intravenous 
infusion input. Alternative methods may be considered. Estimated individual and mean (±SD) 
PK parameters will be tabulated and summarized by dose level. Other descriptive statistics might 
be reported for serum FPA144 concentration-time data and estimated PK parameters. Dose 
proportionality, study drug accumulation, and attainment of steady state will be evaluated as data 
allow. 
The impact of immunogenicity on FPA144 exposure will be assessed.  
8.9 
Interim Analyses 
No formal interim analysis of efficacy is planned. For Part 2 Cohorts A, C, D, E and F, an 
interim analysis of response may be performed to determine adequate efficacy. 
Safety data will be reviewed on a routine basis by the Sponsor and CRO’s Medical Monitors. In 
Part 1 (A and B), the Medical Monitors and Investigator(s) will review safety data from each 
dose cohort prior to dose escalation or de-escalation. Adverse event data from the extended 
treatment period will be presented to the Medical Monitors when available. 
In addition, interim safety reviews will be conducted by an external Data Safety Monitoring 
Board (DSMB) on a regular basis throughout the treatment phase in Part 2.  If warranted from 
these reviews, the DSMB may request additional safety data or recommend modification of 
study conduct as outlined in the DSMB Charter. 
8.10 Determination of Sample Size 
Three patients per dose group, with a sample size increase to 6 in the case of DLT, is generally 
accepted as adequate to determine the safety of escalating doses of novel oncologic drugs. If a 
DLT is observed in 1 of 3 patients, then 3 additional patients will be enrolled at that same dose 
level. Dose escalation will continue until 2 of 3–6 patients treated at a dose level experience a 
DLT. The maximum tolerated dose (MTD) is defined as the maximum dose at which < 33% of 
patients experience a DLT during Cycle 1. After the MTD is determined, additional gastric 
cancer patients may be recruited at that dose level to further characterize the safety, PK, 
pharmacodynamics, and preliminary efficacy of FPA144.  
In Part 1B, up to 30 patients with gastric cancer with or without FGFR2b overexpression, in the 
presence or absence of FGFR2 amplification may be enrolled to explore preliminary long-term 
safety and PK.  
In each of the Part 2 gastric cancer cohorts (Cohorts A, C, D, and E), approximately 30 gastric 
cancer patients with ranges of FGFR2b overexpression scores (IHC 3+ ≥ 10%; IHC 0; IHC 2+ ≥ 

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10% tumor membrane staining and/or IHC 3+ < 10%; IHC 1+ and/or IHC 2+ < 10%) will be 
enrolled and treated to further characterize safety and preliminary efficacy. For each cohort, a 
response rate of ≥ 20% would be considered clinically meaningful. To ensure adequate efficacy, 
an interim analysis may be performed (with the assumption that a response rate of ≤ 5% would 
be of no interest in the first stage).  Assuming a significance level of 5% and 80% power 
(Table 5), the required sample size is 29 evaluable patients per cohort. The Sponsor may choose 
to suspend enrollment if no confirmed response (CR or PR) is observed after the first 10 
evaluable patients have either received at least 4 cycles of therapy or have had disease 
progression, as it is unlikely the response rate would be 20% or more. If a full cohort of 30 
patients is enrolled for a group, the precision of the 95% confidence interval for the response rate 
is within 18%.  
Table 6: 
Parameters of Simon’s 2-stage Design 
Targeted 
Response Rate 
Response Rate 
of No Interest 
Overall 
Sample 
Size 
Sample 
Size at 
Stage I 
Responses  
to go to 
Stage II 
Number of 
Overall 
Responses 
20% 
5% 
29 
10 
≥ 1 
≥ 4 
For Part 2 Cohort F, enrollment of patients with non-gastric solid tumors, including FGFR2b-
selected bladder cancer, will be guided by the same 2-stage design used for cohorts A, C, D, and 
E for each tumor type. 
However, the Sponsor may choose to close enrollment of a cohort at any time (Section 9.11). 
Based on Sponsor decision to close a subset of cohorts in Part 2 (as described in Section 4.1), the 
planned patient enrollment will be approximately 100 patients. 

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9. Ethical, Legal, and Administrative Aspects 
9.1 
Data Quality Assurance 
The Sponsor (or designee) may conduct a site visit prior to study initiation at a site to verify the 
qualifications of each Investigator, inspect the site facilities, and inform the Investigator of 
responsibilities and for ensuring study compliance and procedures for adequate and correct 
documentation. 
The Investigator is required to prepare and maintain adequate and accurate case histories 
designed to record all observations and other pertinent data for each study patient. All 
information recorded on the eCRFs for this study must be consistent with the patients’ source 
documentation (i.e., medical records). 
9.2 
Electronic Case Report Forms and Source Documentation 
All data obtained during this study should be entered into the eCRFs promptly. All source 
documents from which eCRF entries are derived should be placed in the patient’s medical 
records. eCRF fields for which source documents will typically be needed include laboratory 
assessments, physical exam reports, nursing notes, ECG recordings, hospital records, computed 
tomography (CT) scans, X-rays, and/or magnetic resonance imaging (MRI) reports.  
The eCRFs for each patient will be checked against source documents at the study site by the site 
monitor.  
Instances of missing or uninterpretable data will be discussed with the Investigator for resolution. 
9.3 
Access to Source Data 
During the study, a monitor will perform routine site visits to review protocol compliance, 
compare eCRFs and individual patient’s medical records, assess drug accountability, and ensure 
that the study is being conducted according to pertinent regulatory requirements. eCRF entries 
will be verified with source documentation. The review of medical records will be performed in 
a manner to ensure that patient confidentiality is maintained. 
In accordance with ICH GCP guidelines, the Investigator must ensure provision of sufficient 
time, reasonable space, and adequate qualified personnel for the monitoring visits. The visits are 
for the purpose of verifying adherence to the study protocol and the completeness, consistency, 
and accuracy of data entered on the eCRF and other documents. Moreover, regulatory 
authorities, IRBs, IECs, and/or the Sponsor’s Quality Assurance group may wish to carry out 
such source data checks and/or on-site audit inspections. Direct access to source data will be 
required for these inspections and audits; they will be carried out giving due consideration to 
data protection and medical confidentiality. The Investigator assures that the Sponsor and/or 
Sponsor’s designee will receive the necessary support to complete these activities. 

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All participating centers should take particular care in ensuring that original imaging source data 
(CT images, MRI images, echo images, etc.) are maintained and accessible for monitoring, and 
that these original source data are then archived on a long-term basis in compliance with ICH 
GCP Section 8. These images must be stored in a secure location until the Sponsor or Sponsor’s 
designee authorizes their destruction, and must be retrievable by study patient number in the 
event of an audit.  
9.4 
Data Processing 
The Data Management Plan, to be developed during the initiation phase of the study, will include 
specifications for consistency and plausibility checks on data and will also include data-handling 
rules for obvious data errors. All processes for data processing and query handling will be 
described in the Data Management Plan.  
9.5 
Archiving Study Records 
The study site will maintain a study file, which should contain, at minimum, the Investigator’s 
Brochure, the protocol and any amendments, the protocol for tissue sampling, drug 
accountability records, correspondence with the IEC/IRB and the Sponsor (or designee), and 
other study-related documents. 
The Investigator agrees to keep records and those documents that include (but are not limited to) 
the identification of all participating patients, medical records, study-specific source documents, 
source worksheets, all original signed and dated ICFs, copies of all eCRFs, query responses, and 
detailed records of drug disposition to enable evaluations or audits from regulatory authorities 
and Five Prime Therapeutics or its designees.  
The Investigator shall retain records required to be maintained for a period of 5 years following 
the date a marketing application in an ICH region is approved for the drug for the indication for 
which it is being investigated or, if no application is to be filed or if the application is not 
approved for such indication, until at least 5 years after the investigation is discontinued. 
However, these documents should be retained for a longer period if required by the applicable 
regulatory requirement(s) or if needed by the Sponsor. In addition, the Investigator must make 
provision for the patients’ medical records to be kept for the same period of time. 
No data should be destroyed without the agreement of Five Prime Therapeutics. Should the 
Investigator wish to assign the study records to another party or move them to another location, 
Five Prime Therapeutics must be notified in writing of the new responsible person and/or the 
new location.  
Patients’ medical records and other original data will be archived in accordance with the 
archiving regulations or facilities of the investigational site.  

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9.6 
Good Clinical Practice 
The procedures set out in this study protocol are designed to ensure that the Sponsor and 
Investigator abide by GCP guidelines of the ICH and the Declaration of Helsinki (1989). The 
study also will be carried out in compliance with local legal requirements.  
9.7 
Informed Consent 
All information about the clinical study, including the patient information and the ICF, is 
prepared and used for the protection of the human rights of the patient according to ICH GCP 
guidelines and the Declaration of Helsinki. 
The ICF, prepared by the Investigator with the assistance of the sponsor, must be approved along 
with the study protocol by the IEC/IRB and be acceptable to the sponsor before each patient is 
enrolled on the study, written informed consent will be obtained according to the regulatory and 
legal requirements. A copy of the signed ICF will be retained by the patient and the original will 
be filed in the Investigator’s site file, unless otherwise agreed. The Investigator will not 
undertake any investigation specifically required only for the clinical study until valid consent 
has been obtained. The terms of the consent and when it was obtained must be documented in the 
source documents and in the eCRF. 
If a protocol amendment is required, the informed consent form may need to be revised to reflect 
the changes to the protocol. If the consent form is revised, it must be reviewed and approved by 
the appropriate IRB/IEC, and signed by all patients subsequently enrolled in the study as well as 
those currently enrolled in the study. 
9.8 
Protocol Approval and Amendment 
Before the start of the study, the study protocol and/or other relevant documents will be approved 
by the IRB/IEC, in accordance with local legal requirements. The Sponsor, Sponsor’s agents, 
and Investigator must ensure that all ethical and legal requirements have been met before the first 
patient is enrolled in the study. 
This protocol is to be followed exactly. To alter the protocol, amendments must be written, 
receive approval from the appropriate personnel, and receive IRB/IEC approval prior to 
implementation (if appropriate). Following approval, the protocol amendment will be submitted 
to the investigational new drug (IND) application under which the study is being conducted.  
All amendments will be distributed to all protocol recipients, with appropriate instructions. 
Administrative changes (not affecting the patient benefit/risk ratio) may be made without the 
need for a formal amendment. Administrative changes will be distributed to the Investigator and 
others as appropriate.  

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9.9 
Cohort Review Committee 
The CRC will assess safety of the study, Part 1 (A and B) and Part 2, on a regular basis. The 
CRC will consist of representatives from the Sponsor, CRO, as well as one or more designated 
Investigators from actively participating sites in which FPA144 is being evaluated.  
9.10 Duration of the Study 
For any individual patient, the minimum duration of the study will be approximately 3 months. 
This includes up to 28 days for screening, and 1 month on study including 4 weeks (28 days) of 
post-treatment follow-up. Patients who are considered to be benefitting from FPA144 treatment 
may continue on study until disease progression. 
9.11 Premature Termination of the Study or Cohorts 
If the Investigator, Sponsor, or Medical Monitor becomes aware of conditions or events that 
suggest a possible hazard to patients if the study continues, the study may be terminated. The 
study may also be terminated early at the Sponsor’s discretion in the absence of such a finding. 
Conditions that may warrant termination include, but are not limited to: 
• Discovery of an unexpected, significant, or unacceptable risk to the patients enrolled in the 
study 
• Failure to enroll patients at an acceptable rate 
• Decision on the part of the Sponsor to suspend or discontinue development of the drug 
Individual study cohorts may be closed at any time according to the Sponsor’s discretion. 
9.12 Confidentiality 
All study findings and documents will be regarded as confidential. The Investigator and 
members of his/her research team must not disclose such information without prior written 
approval from the Sponsor. 
The anonymity of participating patients must be maintained. Patients will be identified on eCRFs 
and other documents submitted to the Sponsor or Sponsor’s designee by their patient number, 
initials, and/or birth date. Study patients are not to be identified by name, and any information 
sent to the Sponsor or Sponsor’s designee should have patient identifiers redacted, and replaced 
with patient ID. Documents that include the name of the patient (e.g., the signed informed 
consent) must be maintained in confidence by the Investigator. The Investigator further agrees to 
take all reasonable precautions to prevent the disclosure by any employee or agent of the study 
center to any third party or otherwise into the public domain. 
9.13 Other Ethical and Regulatory Issues 
If a significant safety issue is identified, either from an individual case report or review of 
aggregate data, then the Sponsor will issue prompt notification to applicable regulatory 

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authorities and Investigators. Investigators will then notify local IRB/IECs as deemed 
appropriate based on individual IRB/ IEC policy. 
A significant safety issue is one that has a significant impact on the course of the clinical trial or 
program (including the potential for suspension of the trial program or amendments to protocols) 
or warrants immediate update of informed consent. 

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10. References  
Andre, Fabrice, Malcolm Ranson, Emma Dean, et al. "Abstract LB-145: Results of a Phase I 
Study of AZD4547, an Inhibitor of Fibroblast Growth Factor Receptor (FGFR), in 
Patients with Advanced Solid Tumors." Paper presented at the AACR 104th Annual 
Meeting 2013, Washington, DC, 2013. 
Böhm, Friederike, Tobias Speicher, Claus Hellerbrand, et al. "FGF Receptors 1 and 2 Control 
Chemically-Induced Injury and Compound Detoxification in Regenerating Livers of 
Mice." Gastroenterology 139, no. 4 (2010): 1385-96. 
Bron, A., VE Evans, and JA Smith. "Grading of Corneal and Conjuctival Staining in the Context 
of Other Dry Eye Tests." Cornea 22, no. 7 (2003): 640-50. 
Brown, Alan P., Cynthia L. Courtney, Lena M. King, et al. "Cartilage Dysplasia and Tissue 
Mineralization in the Rat Following Administration of a FGF Receptor Tyrosine Kinase 
Inhibitor." Toxicologic Pathology 33 (2005): 449-55. 
Cosson, Valerie , Vivian Ng, Michaela Lehle, et al. "Population Pharmacokinetics and Exposure-
Response Analyses of Trastuzuman in Patients with Advanced Gastric or 
Gastroesophageal Junction Cancer." Cancer Chemotherapy Pharmacology 73 (2014): 
737-47. 
Deng, N., L.  Kee, H. Wang, et al. "A Comprehensive Survey of Genomic Alterations in Gastric 
Cancer Reveals Systematic Patterns of Molecular Exclusivity and Co-Occurrence Among 
Distinct Therapeutic Targets." Gut 61 (2012): 679-84. 
Deshpande, Amit M., Servando Palencia, David I. Bellovin, et al. "Expression of FGFR2b in 
Gastric Cancer as Measured by Immunohistochemistry With a Highly Specific 
Monoclonal Antibody." Paper presented at the American Association for Cancer 
Research San Diego, CA, 2014. 
Dienstmann, Rodrigo, Rastilav Bahleda, Adamo. Barbara, et al. "First in human study of JNJ-
42756493, a potent pan fibroblast growth factor receptor (FGFR) inhibitor in patients 
with advanced solid tumors." Paper presented at the AACR 105th Annual Meeting, San 
Diego, CA, 2014. 
Eisenhauer, E.A., P. Bogaerts, L.H. Schwartz, et al. "New Response Evaluation Criteria in Solid 
Tumours: Revised RECIST Guideline (version 1.1)." European Journal of Cancer 45 
(2009): 228-47. 
Gemo, Abigael , Amit  Deshpande, Servando Palencia, et al. "FPA144: A Therapeutic Antibody 
for Treating Ptients with Gastric Cancers Bearing FGFR2 Gene Amplification." Paper 
presented at the AACR 105th Annual Meeting 2014, San Diego California, 2014. 
Grose, Richard, Vera Fantl, Sabine Werner, et al. "The Role of Fibroblast Growth Factor 
Receptor 2b in Skin Homeostasis and Cancer Development." The EMBO Journal 28 
(2007): 1268-78. 
Han, Kelong, Jin Jin, Mauricio Maia, et al. "Lower Exposure and Faster Clearance of 
Bevacizumab in Gastric Cancer and the Impact of Patient Variables: Analysis of 
Individual Data from AVAGAST Phase III Trial." The AAPS Journal 16, no. 5 (2014): 
1056-63. 

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Hattori, Yutaka, Hiroshi Itoh, Shinya Uchino, et al. "Immunohistochemical Detection of K-sam 
Protein in Stomach Cancer." Clinical Cancer Research 2 (1996): 1373-81. 
Hattori, Yutaka, Hiroki Odagiri, Hiroshi Nakatani, et al. "K-sam, an Amplified Gene in Stomach 
Cancer, is a Member of the Heparin-Binding Growth Factor Receptor Genes." 
Proceedings of the National Academy of Sciences (PNAS) 87 (1990): 5983-87. 
Jung, E. , E.  Jung , S.  Min, et al. "Fibroblast Growth Factor Receptor 2 Gene Amplification 
Status and its Clinicopathologic Significance in Gastric Carcinoma." Human Pathology 
43, no. 10 (2012): 1559-66. 
Lin, Yongshun, Yi-Shing Lisa Cheng, Chunlin Qin, et al. "FGFR2 in the Dental Epithelium is 
Essential for Development and Maintenance of the Maxillary Cervical Loop, a Stem Cell 
Niche in Mouse Incisors." Developmental Dynamics 238, no. 2 (2009): 324-30. 
Miki, Toru, Donald P. Bottaro, Timothy P. Fleming, et al. "Determination of Ligand-Binding 
Specificity by Alternative Splicing: Two Distinct Growth Factor Receptors Encoded by a 
Single Gene." Proceedings of the National Academy of Sciences 69 (1992): 246-50. 
Parsa, Sara, Koh-ichi Kuremoto, Kerstin Seidel, et al. "Signaling by FGFR2b Controls the 
Regenerative Capacity of Adult Mouse Incisors." Development 137 (2010): 3743-52. 
Sequist, Lecia V., Phillippe Cassier, Andrea Varga, et al. "Phase I Study of BGJ398, a Selective 
Pan-FGFR Inhibitor in Genetically Preselected Advanced Solid Tumors." Paper 
presented at the AACR 2014 Annual Meeting, San Diego, CA, 2014. 
Shinkawa, Toyohide, Kazuyasu Nakamura, Naoko Yamane, et al. "The Absence of Fucose but 
Not the Presence of Galactose or Bisecting N-Acetylglucosamine of Human IgG1 
Complex-type Oligosaccharides Shows the Critical Role of Enhancing Antibody-
dependent Cellular Cytotoxicity." THe Journal of Biological Chemisty 278, no. 5 (2003): 
3466-73. 
Steele, I. , R.  Edmondson, J.  Bulmer, et al. "Induction of FGF Receptor 2-IIIb Expression and 
Response to its Ligands in Epithelial Ovarian Cancer." Oncogene 20 (2001): 5878-87. 
Su, X. , P.   Zhan, P. Gavine, et al. "FGFR2 Amplification has Prognostic Significance in Gastric 
Cancer: Results From a Large International MultiCentre Study ". British Journal of 
Cancer 110 (2014): 967-75. 
Turner, N. , and R.  Grose. "Fibroblast Growth Factor Signalling: From Development to Cancer." 
Nature 10 (2010): 116-29. 
Turner, N., M.B. Lambros, H.M. Horlings, et al. "Integrative Molecular Profiling of Triple 
Negative Breast Cancers Identifies Amplicon Drivers and Potential Therapeutic Targets." 
Oncogene 29 (2010): 2013-23. 
Werner, Sabine, Hans Smola, Xiang Liao, et al. "The Function of KGF in Morphogenesis of 
Epithelium and Reepithelialization of Wounds." Science 266 (1994): 819-22. 
Wu, Yi-Mi, Fengyun Su, Shanker Kalyana-Sundaram, et al. "Identifi cation of Targetable FGFR 
Gene Fusions in Diverse Cancers." Cancer Discovery 3, no. 6 (2013): 636-47. 
Xu, Xiaoling, Michael  Weinstein, Cuiling Li, et al. "Fibroblast growth factor receptor 2 
(FGFR2)-mediated reciprocal regulation loop between FGF8 and FGF10 is essential for 
limb induction." Development 125, no. 753-765 (1998): 753. 

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Yang, Jingxuan, Michael  Müller, A.  Müller, et al. "Fibroblast Growth Factor Receptors 1 and 2 
in Keratinocytes Control the Epidermal Barrier and Cutaneous Homeostasis." The 
Journal of Cell Biology 188, no. 8 (2010): 935-52. 
Zhang, Xiuqin, Omar  Ibrahimi, Shaun  Olsen, et al. "Receptor Specificity of the Fibroblast 
Growth Factor Family." The Journal of Biological Chemisty 281, no. 23 (2006): 15694-
700. 
 
 

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11. Appendices 
The following appendices are provided for this protocol. 
Appendix 1: 
Schedule of Assessments–Dose Escalation and Dose Expansion Cohorts ............94 
Appendix 2: 
Study Flowchart for Pharmacokinetic, Immunogenicity, and 
Pharmacodynamic Blood Sample Collections for Part 2 .......................................97 
Appendix 3: 
ECOG Performance Status ....................................................................................98 
Appendix 4: 
Fluorescein Stain Grading Systems .......................................................................99 
 
 

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Appendix 1: 
Schedule of Assessments–Dose Escalation and Dose Expansion Cohorts 
Procedurea 
Screening 
Parts 1A, 1B and 2 Cycle 1 
Part 1A/Part 1B/Part 2 Cycle 2 
and Subsequent Cycles 
End of 
Treatmentb 
Day –28 to 
Day 0 
Day 1 
Day 2 
Day 4 
Day 8 
Day 15 
Day 1 
Day 15 
Other 
Week 0 
Week 1 
Week 1 
Week 1 
Week 2 
Week 3 
≥Week 4 
Informed Consent 
Xz 
 
 
 
 
 
 
 
 
 
Review/Confirm Eligibility Criteria 
X 
X 
 
 
 
 
 
 
 
 
Medical/Oncology History 
X 
X 
 
 
 
 
 
 
 
 
Tumor Tissue Collectionc 
X 
 
 
 
 
 
 
 
 
 
Optional Archival Tumor Tissue Collectiond 
 
 
 
 
 
 
 
 
X 
 
Demography/Baseline Characteristics 
X 
 
 
 
 
 
 
 
 
 
Physical Examinatione, f  
X 
X 
 
 
X 
X 
X 
X 
 
X 
ECOG Performance Status 
X 
 
 
 
 
 
Xn 
 
 
X 
Vital Signsg 
X 
Xg 
X 
X 
X 
Xg 
Xg 
Xg 
 
X 
12-lead ECGh 
X 
 
 
 
 
 
 
 
Xi 
X 
Comprehensive Ophthalmologic Examt 
X 
 
 
 
 
 
X t 
 
Xi 
X 
Slit Lamp Examu   
 
 
 
 
 
 
X 
X 
Xi 
 
Clinical Safety laboratory sampling j, k 
X 
X 
 
 
X 
X 
X 
X 
 
X 
Serum Pregnancy Testl 
X 
X 
 
 
 
 
 
 
 
X 
Urinalysism 
X 
X 
 
 
 
 
X 
 
Xi 
X 
Radiological/Tumor Scans o 
X 
 
 
 
 
 
Xp 
Xp 
Xp 
Xq 
Biopsyy 
X 
 
 
 
 
X 
X 
 
X 
X 
Immunogenicity Samplingv 
 
X  
 
 
 
 
X  
 
 
X  
Optional collection for FCGR Polymorphismw 
 
X 
 
 
 
 
 
 
 
 
Blood-based biomarker sample collectionx  
 
X 
 
 
 
 
 
 
X 
X 
PK Samples 
 
Xr 
Xr 
Xr 
Xr 
Xr 
Xr 
 
 
Xr 
FPA144 Dose 
 
X 
 
 
 
X 
X 
X 
 
 
Adverse Eventss and Prior/Concomitant Meds 
X 
 
X ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––X 

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a 
Unless specified, procedure is to be completed within ± 72 hours of scheduled time point and to be synchronized with administration day of FPA144 infusion. 
b 
End of Treatment (EOT) assessments should be performed 28 (±3) days following the last dose of FPA144.  
c 
Tumor tissue from archival or newly obtained material will be submitted for Part 1A patients (optional, if available), and is required for enrollment in Part 2. Refer to the 
Laboratory Manual for sample handling instructions. 
d 
For patients who consent to the optional exploratory tumor analysis, participation is contingent on the availability of adequate archival tumor specimens (distinct from 
those provided for patient selection) and is permitted only after discussion and approval by the Sponsor.   
e 
Complete physical exam and height will be measured at Screening only. Limited physical examinations should be conducted, including examination of the oropharynx, 
thereafter.  
f 
After Cycle 1, dose will be recalculated at each infusion visit only if weight has changed >10% from Cycle 1, Day 1. 
g 
Vital signs (blood pressure, pulse, respiration, and temperature) are to be measured on Cycle 1 Day 1 at the following time points: pre-dose, and 0.5, 1, 2, and 4 hours, from the 
start of infusion. On subsequent dosing days, pre-dose and at 0.5 and 1 hour from start of infusion. 
h 
With patient resting for 5 minutes prior to recording. 
i 
If clinically indicated at any time. 
j 
Includes hemoglobin, hematocrit, WBC and differential (with ANC), and platelet count. Blood will be analyzed by a local laboratory and must be reviewed by the Investigator 
prior to dosing with FPA144.  
k 
CBC with differential, platelets, hemoglobin, hematocrit, RBC, and RBC indices. Blood chemistry including magnesium. Hematology, blood chemistry, and urinalysis test 
results must be obtained within 72 hours of dosing to confirm eligibility. On FPA144 dosing days, hematology, blood chemistry to be performed but only hematology results are 
required prior to dosing. Coagulation samples need to be obtained at Cycle 1 through Cycle 4 only, unless clinically indicated. 
l 
Serum ß-hCG (evaluated by local laboratories) will be performed only on women of childbearing potential  5 days prior to the first dose of FPA144 and at EOT. 
m 
Includes dipstick for protein, glucose, blood, pH, and ketones. If dipstick findings are abnormal, then a microscopic evaluation will be performed to assess the abnormal 
findings. 
n 
ECOG Performance Status will be assessed at Day 1 Cycle 2 and Day 1 of subsequent cycles until the End of Treatment visit. 
o 
Tumor assessments should consist of clinical examination and appropriate imaging techniques (preferably CT scans with appropriate slice thickness per RECIST); other 
assessments (MRI, X-ray, PET, and ultrasound) may be performed if required. The same methods used to detect lesions at baseline are to be used to follow the same lesions 
throughout the clinical study. Screening tumor scan must be within 4 weeks of the start of treatment on Day 1. 
p 
Tumor scans to be performed at Screening (within 4 weeks of Cycle 1 Day 1) and within 7 days prior to the start of Cycle 2 Day 15, Cycle 4 Day 1, Cycle 5 Day 15, Cycle 7 
Day 1, and then approximately every 12 weeks. If initial CR or PR is noted, confirmatory scans must be performed 4–6 weeks later. 
q 
This scan can be omitted if the last scan was performed < 6 weeks prior to EOT visit or if tumor progression was previously determined.  
r 
For Part 1A Cycle 1 Day 1 to Day 8: PK samples to be collected within 4 hours prior to dosing of FPA144 and at the following time points relative to the start of the infusion: 
0.5 hours (within 5 minutes after end of infusion), +1 hour (±5 minutes), 2 hours (±5 minutes), 4 hours (±5 minutes), 8 hours (±5 minutes), 24 hours (Day 2, ±1 hour), 72 hours 
(Day 4, +24 hour) and 168 hours (Day 8) from start of infusion.  
For Part 1B Cycle 1 Day 1 to Day 8: PK samples to be collected within 4 hours prior to dosing of FPA144 and at the following time points relative to the start of the infusion: 
0.5 hours (within 5 minutes after end of infusion), +1 hour (±5 minutes), 4 hours (±5 minutes), 24 hours (Day 2, ±1 hour), 72 hours (Day 4, +24 hour) and 168 hours (Day 8) 
from start of infusion.   
Part 2 Cycle 1 Day 1 to Day 8: PK samples to be collected within 4 hours prior to dosing of FPA144 and at 0.5 hours (within 5 minutes after end of infusion),  +1 hour (±5 
minutes), 4 hours (±5 minutes), and 168 hours (Day 8, ± 2 days) from the start of infusion.  
For Parts 1 (A & B) and 2 Cycle 1 Day 15 and Cycles 2-5 Day 1 and every other cycle Day 1 starting from Cycle 5: PK samples to be collected ≤4 hours prior to dosing of 
FPA144 and 0.5 hours (within 5 minutes after the end of infusion). Refer to the Laboratory Manual for detailed sample handling instructions. 
s 
AE collection begins following signing of the ICF for Screening. Events reported prior to the first infusion will be considered pretreatment events and reported on the Medical 
History page of the eCRF, unless they directly correlate to a study-related procedure. Adverse event reporting will continue until completion of the EOT visit or until 28 days 
after the last dose of study drug. 

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t 
Prior to Cycle 2 Day 1 only comprehensive ophthalmologic evaluations should include fundoscopic and slit lamp exam, OCT, visual acuity, and review of symptoms. The 
comprehensive ophthalmologic exam will be repeated at any point if changes in visual acuity or visual symptoms are reported by patients. 
u 
 
v 
Slit lamp exams (including completion of fluorescein staining form) without OCT every 6 weeks through Cycle 6 Day 15 (prior to Cycle 3, Day 15; Cycle 5, Day 1; Cycle 6, 
Day 15), and then every 12 weeks after Cycle 6 Day 15. Slit lamp exams will continue every 6–8 weeks if the patient has any persistent corneal findings. 
Blood samples to be collected prior to dosing on Day 1 of Cycles 1-5and every other cycle starting from cycle 5 for measurement of anti-FPA144 antibodies. 
w 
x 
 
y 
 
 
 
z 
FCGR polymorphism  testing sample must both be collected  prior to first dose 
Blood-based biomarker sample will be collected from Part 2 patients prior to dosing on Cycle 1 Day 1 and then every 6 weeks from the first dose for 24 weeks (prior to Cycle 2 
Day 15, Cycle 4 Day 1, Cycle 5 Day 15, Cycle 7 Day 1), and then approximately every 12 weeks thereafter as outlined in Appendix 2. 
Biopsy at primary tumor or metastatic tumor site will be collected at screening [at least 24 hours prior to dosing] and either at 15 days on-treatment [within 7 days prior to 
Cycle 1 Day 15 and at least 24 hours prior to dosing] or at 29 days on-treatment [within 7 days prior to Cycle 2 Day 1 and at least 24 hours prior to dosing]. After consultation 
with the Sponsor, patients who have documented response may receive another biopsy within 28 (±7) days post tumor assessment and/or patients who have progression may 
receive another biopsy at the End-of–Treatment visit. The post-response and post-progression biopsies are optional.  
Written, signed informed consent must be collected prior to any study-specific procedures.  The most recent IRB/EC approved ICF must be signed. 

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Appendix 2: 
Study Flowchart for Pharmacokinetic, Immunogenicity, and 
Pharmacodynamic Blood Sample Collections for Part 2 
Study Cycle 
Study Day 
Time Point 
Type of Sample 
Cycle 1 
Day 1 (First Dose) 
≤ 4 hours Prior to infusion 
FPA144 PK (serum) 
ADA (serum) 
 
Blood-based Biomarker 
(whole blood) 
FCGR Polymorphism 
(optional; whole blood) 
5 minutes after end of infusion  
FPA144 PK (serum) 
1 hour after end of infusion (± 5 minutes) FPA144 PK (serum) 
4 hours after end of infusion (±5 minutes) FPA144 PK (serum) 
Day 8 
168 hours after infusion (±2 days) 
FPA144 PK (serum) 
Day 15 
(Second Dose) 
≤ 4 hours Prior to infusion 
FPA144 PK (serum) 
5 minutes after end of infusion  
FPA144 PK (serum) 
Cycle 2 thru Cycle 5 
Day 1 (First Dose) 
≤ 4 hours Prior to infusion 
FPA144 PK (serum) 
ADA (serum) 
 
Blood-based Biomarker 
at Cycle 4 only ( whole 
blood) 
5 minutes after end of infusion 
FPA144 PK (serum) 
Day 15 
(Second Dose) 
≤ 4 hours Prior to infusion 
Blood-based Biomarker 
at Cycle 2 and 5 only 
(whole blood)  
Cycle 7 and 
Subsequent Cycles  
Day 1 (First Dose) 
≤ 4 hours Prior to infusion 
FPA144 PK at odd 
cycles only (serum)  
ADA at odd cycles only 
(serum) 
Blood-based Biomarker 
at Cycle 7 and then 
every 12 weeks 
thereafter (whole blood) 
5 minutes after end of infusion 
FPA144 PK at odd 
cycles only (serum) 
End of Treatment  
Follow-up   
Visit Date 
During Visit 
FPA144 PK (serum) 
ADA (serum) 
 
Blood-based Biomarker 
(whole blood) 

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Appendix 3: 
ECOG Performance Status 
Grade 
 
Performance Status Criteria 
0 
 
Fully active, able to carry on all pre-disease activities without restriction. 
1 
 
Restricted in physically strenuous activity but ambulatory and able to carry 
out work of a light sedentary nature (light housework, office work). 
2 
 
Ambulatory and capable of all self-care but unable to carry out any work 
activities. Up and about more than 50% of waking hours. 
3 
 
Capable of only limited self-care, confined to bed or chair more than 50% 
of waking hours. 
4 
 
Completely disabled. Cannot carry on any self-care. Totally confined to 
bed or chair. 
 

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Appendix 4: 
Fluorescein Stain Grading Systems 
 

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Appendix 4: Fluorescein Stain Grading Systems (Cont.) 
 

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Appendix 4: Fluorescein Stain Grading Systems (Cont.) 
 

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Appendix 4: Fluorescein Stain Grading Systems (Cont.) 
 

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Appendix 4: Fluorescein Stain Grading Systems (Cont.)