UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended December 31, 2021

or

☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period fromto

Commission file number: 001-37410

ESSA Pharma Inc.

(Exact name of registrant as specified in its charter)

British Columbia, Canada	98-1250703
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification Number)
Suite 720, 999 West Broadway
Vancouver, BC V5Z 1K5
(Address of principal executive offices, including zip code)
Registrant’s telephone number, including area code: (778) 331-0962
Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Shares	EPIX	Nasdaq Capital Market

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. Yes ☐ No ☒

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

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

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Securities Exchange Act of 1934). Yes ☐ No ☒

The number of outstanding common shares of the registrant, no par value per share, as of February 3, 2022 was 44,015,870.

ESSA PHARMA INC.

QUARTERLY REPORT ON FORM 10-Q

For the Quarter Ended December 31, 2021

Table of Contents

	PART I. FINANCIAL INFORMATION	8
Item 1.	Financial Statements and Supplementary Data	8
	Condensed Consolidated Interim Balance Sheets as of December 31, 2021 and September 30, 2021	9
	Condensed Consolidated Interim Statements of Operations and Comprehensive Loss for the three months ended December 31, 2021 and 2020	10
	Condensed Consolidated Interim Statements of Cash Flows for the three months ended December 31, 2021 and 2020	11
	Condensed Consolidated Interim Statement of Changes in Shareholders’ Equity for the three months ended December 31, 2021 and 2020	12
	Notes to Condensed Consolidated Interim Financial Statements	13
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operation	24
Item 3.	Controls and Procedures	47
	PART II. OTHER INFORMATION	48
Item 1.	Legal Proceedings	48
Item 1A.	Risk Factors	48
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	48
Item 3.	Defaults Upon Senior Securities	48
Item 4.	Mine Safety Disclosures	48
Item 5.	Other Information	48
Item 6.	Exhibits, Financial Statement Schedules	49
	SIGNATURES	50

2

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS AND RISK FACTOR SUMMARY

This Quarterly Report on Form 10-Q includes “forward-looking statements” within the meaning of the U.S. Private Securities Litigation Reform Act of 1995 and “forward-looking information” within the meaning of Canadian securities laws, or collectively, forward-looking statements. Forward-looking statements include statements that may relate to our plans, objectives, goals, strategies, future events, future revenue or performance, capital expenditures, financing needs and other information that is not historical information. Many of these statements appear, in particular, under the headings “Business,” “Risk Factors,” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations”. Forward-looking statements can often be identified by the use of terminology such as “subject to”, “believe,” “anticipate,” “plan,” “expect,” “intend,” “estimate,” “project,” “may,” “will,” “should,” “would,” “could,” “hope,” “can,” the negatives thereof, variations thereon and similar expressions, or by discussions of strategy. Such forward-looking statements involve known and unknown risks, uncertainties and other factors that may cause the Company’s actual results, performance or achievements to be materially different from any future results, performance or achievements that may be expressed or implied by such forward-looking statements. Examples of such forward looking statements include, but are not limited to statements related to:

● our ability to maintain operations, development programs, preclinical studies, clinical trials and raise capital as a result of the coronavirus disease 2019 outbreak (“COVID 19”);

● our ability to advance our product candidate and potential future product candidates through, and successfully complete, clinical trials;

● our ability to recruit sufficient numbers of patients in a timely manner for current and future clinical trials, and the benefits expected therefrom;

● our ability to establish and maintain relationships with collaborators with acceptable development, regulatory and commercialization expertise and the benefits to be derived from such collaborative efforts;

● our ability to obtain funding for operations, including research funding, and the timing and potential sources of such funding;

● the initiation, timing, cost, location, progress and success of, strategy and plans with respect to our research and development programs (including research programs and related milestones with regards to next-generation drug candidates and compounds), preclinical studies and clinical trials;

● the therapeutic benefits, properties, effectiveness, pharmacokinetic profile and safety of our product candidate and potential future product candidates, if any, including the expected benefits, properties, effectiveness, pharmacokinetic profile and safety of our next-generation aniten compounds;

● our ability to protect our intellectual property and operate our business without infringing upon the intellectual property rights of others;

● developments relating to our competitors and our industry, including the success of competing therapies that are or may become available;

● our ability to achieve profitability;

● the grant (“CPRIT Grant”) under the Cancer Prevention and Research Institute of Texas (“CPRIT”) and payments thereunder, including any residual obligations;

● our intended use of proceeds from past and future offerings of our securities;

● the implementation of our business model and strategic plans, including strategic plans with respect to patent applications and strategic collaborations and partnerships;

● our ability to identify, develop and commercialize product candidates;

● our commercialization, marketing and manufacturing capabilities and strategy;

● our expectations regarding federal, state, provincial and foreign regulatory requirements, including our plans with respect to anticipated regulatory filings;

● whether we will receive, and the timing and costs of obtaining, regulatory approvals in the United States, Canada and other jurisdictions;

● the accuracy of our estimates of the size and characteristics of the markets that may be addressed by our product candidate and potential future product candidates, if any;

● the rate and degree of market acceptance and clinical utility of our potential future product candidates, if any;

3

● the timing of, and our ability and our collaborators’ ability, if any, to obtain and maintain regulatory approvals for our product candidate and potential future product candidates, if any;

● our expectations regarding market risk, including inflation, interest rate changes and foreign currency fluctuations;

● our ability to engage and retain the employees required to grow our business;

● the compensation that is expected to be paid to our employees;

● our future financial performance and projected expenditures; and

● estimates of our financial condition, expenses, future revenue, capital requirements and our need for additional financing and potential sources of capital and funding.

Such statements reflect our current views with respect to future events, are subject to risks and uncertainties and are necessarily based upon a number of estimates and assumptions that are inherently subject to significant medical, scientific, business, economic, competitive, political and social uncertainties and contingencies. Many factors could cause our actual results, performance or achievements to be materially different from any future results, performance, or achievements that may be expressed or implied by such forward-looking statements, including those described under “Risk Factors” in our Annual Report on Form 10-K. All forward-looking statements included in this Quarterly Report on Form 10-Q, are based upon our current expectations and various assumptions. Certain assumptions made in preparing the forward-looking statements include, but are not limited to:

● our ability to maintain operations as a result of the COVID-19 outbreak;

● our ability to conduct a clinical study involving our product candidate and to identify any future product candidates;

● our ability to obtain regulatory and other approvals to commence a clinical trial involving any future product candidates;

● our ability to obtain positive results from research and development activities, including clinical trials;

● the availability of sufficient financing on reasonable terms;

● our ability to obtain required regulatory approvals;

● our ability to protect patents and proprietary rights;

● our ability to successfully out-license or sell future products, if any, and in-license and develop new products;

● the absence of material adverse changes in our industry or the global economy;

● our ability to attract and retain key personnel;

● our continued compliance with third party license terms and non-infringement of third-party intellectual property rights;

● our ability to maintain good business relationships with our strategic partners; and

● our ability to understand and predict market competition.

We believe there is a reasonable basis for our current expectations, views and assumptions, but they are inherently uncertain. We may not realize our expectations and our views and assumptions may not prove correct. Actual results could differ materially from those described or implied by such forward-looking statements.  In evaluating forward-looking statements, investors should specifically consider the following uncertainties and factors, among others (including those set forth under the heading “Risk Factors” in our Annual Report on Form 10-K), that could affect future performance and cause actual results to differ materially from those matters expressed in or implied by forward-looking statements

● risks related to our ability to maintain operations and execute on our business plan as a result of the COVID-19 outbreak or other health epidemics;

● risks related to clinical trial development and our ability to conduct the clinical trial of our product candidate and the predictive value of our current or planned clinical trials;

● risks related to clinical trials being conducted by third parties under collaboration and clinical supply agreements, including combination studies, using the Company’s product candidate, studies which the Company may not control, and ensuing reputational risk related to clinical trial results;

● risks related to our future success being dependent primarily on identification through preclinical studies, clinical studies, regulatory approval for commercialization of a single product candidate;

● risks related to our license agreement with third parties;

● uncertainty related to our ability to obtain required regulatory approvals for our proposed products;

4

● risks related to the Company’s ability to conduct a clinical trial or submit a future NDA/NDS or IND/CTA (each, as defined herein);

● risks related to our ability to successfully commercialize future product candidates;

● risks related to the possibility that our product candidate and potential future product candidates, if any, may have undesirable side effects;

● risks related to our ability to enroll subjects in clinical trials ,including enrollment delays that may be the result of the impact of Covid at clinical trial sites;

● risks that the FDA may not accept data from trials conducted in locations outside the United States;

● risks related to our ongoing obligations and continued regulatory review;

● risks related to potential administrative or judicial sanctions;

● the risk of increased costs associated with prolonged, delayed or terminated clinical trials;

● the risk that third parties may not carry out their contractual duties;

● risks related to the possibility that our relationships with clinical research organizations or academic institutions may terminate;

● risks related to our lack of experience manufacturing product candidates on a large clinical or commercial scale and our lack of manufacturing facility;

● risks inherent in foreign operations, including related to foreign sourced raw materials, manufacturing or clinical trials;

● risks related to disruptions in domestic and foreign supply chains that the Company relies on for the production and shipment of raw materials and clinical trial materials, including disruptions in suppliers ability to deliver related to Covid;

● risks related to our failure to obtain regulatory approval in international jurisdictions;

● risks related to recently enacted and future legislation in the United States that may increase the difficulty and cost for us to obtain marketing approval of, and commercialize, our product candidate and potential future products, if any, and affect the prices we may obtain;

● risks related to new legislation, new regulatory requirements, and the continuing efforts of governmental and third-party payors to contain or reduce the costs of healthcare;

● uncertainty as to our ability to raise additional funding;

● risks related to our ability to raise additional capital on favorable terms and the impact of dilution from incremental financing;

● risks of a deemed default on any residual obligations of the agreement providing for the CPRIT Grant and having to reimburse all of the CPRIT Grant, if such deemed default is not waived by CPRIT;

● risks related to our incurrence of significant losses in every quarter since inception and our anticipation that it will continue to incur significant losses in the future;

● risks related to our limited operating history;

● risks related to our reliance on proprietary technology;

● risks related to our ability to protect our intellectual property rights throughout the world;

● risks related to claims by third parties asserting that we, or our employees or consultants have misappropriated their intellectual property, or claiming ownership of what we regard as our intellectual property;

● risks related to our ability to comply with governmental patent agency requirements in order to maintain patent protection;

● risks related to computer system failures or security breaches and increasing cyber threats;

● risks related to business disruptions that could seriously harm our future revenues and financial condition and increase our costs and expenses;

● risks related to our dependence on the use of information technologies;

● risks related to our ability to attract and maintain highly qualified personnel;

● risks relating to the possibility that third-party coverage and reimbursement and health care cost containment initiatives and treatment guidelines may constrain our future revenues;

● risks related to potential conflicts of interest between us and our directors and officers;

● risks related to competition from other biotechnology and pharmaceutical companies;

● risks related to movements in foreign currency exchange rates, interest rates and rate of inflation;

5

● risks related to our ability to convince public payors and hospitals to include our product candidate and potential future products, if any, on their approved formulary lists;

● risks related to our ability to establish an effective sales force and marketing infrastructure, or enter into acceptable third-party sales and marketing or licensing arrangements;

● risks related to our ability to manage growth;

● risks related to our ability to achieve or maintain expected levels of market acceptance for our products;

● risks related to our ability to realize benefits from acquired businesses or products or form strategic alliances in the future;

● risks related to collaborations with third parties;

● risks that employees may engage in misconduct or other improper activities, including noncompliance with regulatory standards and requirements, which could cause significant liability for us and harm our reputation;

● risks related to product liability lawsuits;

● risks related to compulsory licensing and/or generic competition;

● risks related to no longer being considered an emerging growth company;

● risks related to our ability to maintain an active trading market for the Company's common shares;

● risks related to share price volatility in the event there is low liquidity for the trading of the Company’s common shares;

● risks related to the possibility that laws and regulations governing international operations may preclude us from developing, manufacturing and selling certain product candidates outside of the United States and Canada and require us to develop and implement costly compliance programs;

● risks related to laws that govern fraud and abuse and patients’ rights;

● risks related to our ability to comply with environmental, health and safety laws and regulations;

● risks related to us being a “passive foreign investment company”;

● risks related to United States investors’ ability to effect service of process or enforcement of actions against us;

● risks related to market price and trading volume volatility;

● risks related to our dividend policy;

● risks associated with future sales of our securities;

● risks related to our ability to implement and maintain effective internal controls;

● risks related to provisions in our charter documents and Canadian law affecting corporate governance; and

● risks related to analyst coverage.

If one or more of these risks or uncertainties or a risk that is not currently known to us, materialize, or if our underlying assumptions prove to be incorrect, actual results may vary materially from those expressed or implied by forward-looking statements. The forward-looking statements represent our expectations, plans, estimates and views as of the date of this document. We do not undertake and specifically decline any obligation to update, republish or revise forward-looking statements to reflect future events or circumstances or to reflect the occurrences of unanticipated events, except as required by law. Investors are cautioned that we cannot guarantee future results, events, levels of activity, performance or achievements and that forward-looking statements are inherently uncertain. Accordingly, investors are cautioned not to put undue reliance on forward-looking statements. We advise you that these cautionary remarks expressly qualify in their entirely all forward-looking statements attributable to us or persons acting on our behalf.

In December 2019, a novel strain of coronavirus, COVID-19, was reported to have surfaced in Wuhan, China. Since then, COVID-19 has spread to multiple countries, including the United States, Canada, and all European countries. On March 11, 2020, the World Health Organization characterized COVID-19 as a pandemic. COVID-19 has had a broad adverse impact on the global economy across many industries and has resulted in significant governmental measures being implemented to control the spread of the virus, including quarantines, travel restrictions and business shutdowns, as well as significant volatility in global financial markets. Although COVID-19 has not to date had any material impact on our business, operations or financial condition, there can be no assurances that it will not have an impact on our business, operations or financial condition going forward. Management has taken recommended precautions, including adherence to local and facility-related pandemic mandates, support for work at home, and encouragement and monitoring of employee vaccination. See “Risk Factors - Risks Relating to COVID-19” in our Annual Report on Form 10-K.

6

We express all amounts in this Quarterly Report on Form 10-Q in U.S. dollars, except where otherwise indicated. References to “$” and “US$” are to U.S. dollars and references to “C$” are to Canadian dollars. Except as otherwise indicated, references in this Quarterly Report on Form 10-Q to “ESSA,” “the Company,” “we,” “us” and “our” refer to ESSA Pharma Inc. and its subsidiaries.

7

PART I. FINANCIAL INFORMATION

Item 1.     Financial Statements and Supplementary Data

ESSA Pharma Inc.

CONDENSED CONSOLIDATED INTERIM FINANCIAL STATEMENTS

(Unaudited)

(Expressed in United States dollars)

FOR THE THREE MONTHS ENDED DECEMBER 31, 2021

8

ESSA PHARMA INC.

CONDENSED CONSOLIDATED INTERIM BALANCE SHEETS

(Unaudited)

(Expressed in United States dollars)

AS OF

		December 31,		September 30,
	2021		2021
ASSETS
Current
Cash and cash equivalents	$	121,058,121	$	137,825,024
Short-term investments (Note 4)		68,141,166		57,102,159
Receivables		2,028		489,012
Prepaids (Note 5)		1,747,540		2,181,882
		190,948,855		197,598,077
Deposits		259,455		259,455
Operating lease right-of-use assets (Note 7)		277,839		308,286
Total assets	$	191,486,149	$	198,165,818
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current
Accounts payable and accrued liabilities (Note 6)	$	3,524,590	$	3,808,944
Current portion of operating lease liabilities (Note 7)		133,180		120,719
		3,657,770		3,929,663
Derivative liabilities (Note 8)		119,670		20,352
Operating lease liabilities (Note 7)		169,301		210,251
Total liabilities		3,946,741		4,160,266
Shareholders’ equity
Authorized
Unlimited common shares, without par value
Unlimited preferred shares, without par value
Common shares 44,015,870 issued and outstanding (September 30, 2021 – 43,984,346) (Note 9)		277,645,624		277,415,176
Additional paid-in capital (Note 9)		38,843,947		36,442,620
Accumulated other comprehensive loss		(2,076,479)		(2,076,479)
Accumulated deficit		(126,873,684)		(117,775,765)
		187,539,408		194,005,552
Total liabilities and shareholders’ equity	$	191,486,149	$	198,165,818

Nature of operations (Note 1)

The accompanying notes are an integral part of these condensed consolidated interim financial statements.

9

ESSA PHARMA INC.

CONDENSED CONSOLIDATED INTERIM STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(Unaudited)

(Expressed in United States dollars)

FOR THE THREE MONTHS ENDED DECEMBER 31,

	2021		2020
OPERATING EXPENSES
Research and development	$	6,019,759	$	4,485,772
Financing costs (Notes 7 and 8)		4,325		1,181
General and administration		3,062,170		2,208,917
Total operating expenses		(9,086,254)		(6,695,870)
Foreign exchange		13,169		7,196
Interest income		74,584		35,691
Derivative liability gain (Note 8)		(99,318)		89,130
Loss for the period before taxes		(9,097,819)		(6,563,853)
Income tax recovery (expense)		(100)		35,149
Loss and comprehensive loss for the period	$	(9,097,919)	$	(6,528,704)
Basic and diluted loss per common share	$	(0.21)	$	(0.20)
Weighted average number of common shares outstanding – basic and diluted		43,989,773		33,343,488

The accompanying notes are an integral part of these condensed consolidated interim financial statements.

10

ESSA PHARMA INC.

CONDENSED CONSOLIDATED INTERIM STATEMENTS OF CASH FLOWS

(Unaudited)

(Expressed in United States dollars)

FOR THE THREE MONTHS ENDED DECEMBER 31,

	2021		2020
CASH FLOWS FROM OPERATING ACTIVITIES
Loss for the period	$	(9,097,919)	$	(6,528,704)
Items not affecting cash and cash equivalents:
Amortization of right-of-use asset		30,447		27,581
Accretion of lease liability		3,884		1,181
Derivative liability loss (gain)		99,318		(89,130)
Interest income		(38,967)		(5,007)
Unrealized foreign exchange		24,759		13,952
Share-based payments		2,500,091		1,204,985
Changes in non-cash working capital items:
Receivables		504,381		102,308
Prepaids		434,310		462,405
Accounts payable and accrued liabilities		(279,954)		867,841
Net cash used in operating activities		(5,819,650)		(3,942,588)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of short-term investments		(15,014,700)		—
Proceeds from short-term investments sold		4,000,000		—
Interest from short-term investments		14,660		—
Net cash used in investing activities		(11,000,040)		—
CASH FLOWS FROM FINANCING ACTIVITIES
Options exercised		104,324		153,701
Warrants exercised		—		149
Shares purchased through employee share purchase plan		27,360		27,369
Lease payments		(32,373)		(30,287)
Net cash provided by financing activities		99,311		150,932
Effect of foreign exchange on cash and cash equivalents		(46,524)		(44,595)
Change in cash and cash equivalents for the period		(16,766,903)		(3,836,251)
Cash and cash equivalents, beginning of period		137,825,024		56,320,763
Cash and cash equivalents, end of period	$	121,058,121	$	52,484,512

The accompanying notes are an integral part of these condensed consolidated interim financial statements.

11

ESSA PHARMA INC.

CONDENSED CONSOLIDATED INTERIM STATEMENT OF CHANGES IN SHAREHOLDERS’ EQUITY

(Unaudited)

(Expressed in United States dollars)

FOR THE THREE MONTHS ENDED DECEMBER 31, 2021 and 2020

						Accumulated
				Additional		other
	Number	Common		paid-in		comprehensive
	of shares	shares		capital		loss		Deficit		Total
Balance, September 30, 2020	32,064,411	$	131,086,364	$	31,204,284	$	(2,076,479)	$	(80,970,304)	$	79,243,865
Warrants exercised	1,493,504		2,987,158		(2,987,009)		—		—		149
Options exercised	42,207		274,365		(120,664)		—		—		153,701
Shares issued through employee share purchase plan	5,261		39,638		(12,269)		—		—		27,369
Share-based payments	—		—		1,204,985		—		—		1,204,985
Loss for the period	—		—		—		—		(6,528,704)		(6,528,704)
Balance, December 31, 2020	33,605,383	$	134,387,525	$	29,289,327	$	(2,076,479)	$	(87,499,008)	$	74,101,365
						Accumulated
				Additional		other
	Number	Common		paid-in		comprehensive
	of shares	shares		capital		loss		Deficit		Total
Balance, September 30, 2021	43,984,346	$	277,415,176	$	36,442,620	$	(2,076,479)	$	(117,775,765)	$	194,005,552
Options exercised	29,080		184,512		(80,188)		—		—		104,324
Shares issued through employee share purchase plan	2,444		45,936		(18,576)		—		—		27,360
Share-based payments	—		—		2,500,091		—		—		2,500,091
Loss for the period	—		—		—		—		(9,097,919)		(9,097,919)
Balance, December 31, 2021	44,015,870	$	277,645,624	$	38,843,947	$	(2,076,479)	$	(126,873,684)	$	187,539,408

The accompanying notes are an integral part of these condensed consolidated interim financial statements.

12

ESSA PHARMA INC.

NOTES TO THE CONDENSED CONSOLIDATED INTERIM FINANCIAL STATEMENTS

(Unaudited)

(Expressed in United States dollars)

FOR THE THREE MONTHS ENDED DECEMBER 31, 2021

1.     NATURE OF OPERATIONS

Nature of Operations

The Company was incorporated under the laws of the Province of British Columbia on January 6, 2009. The Company’s head office address is Suite 720 – 999 West Broadway, Vancouver, BC, V5Z 1K5. The registered and records office address is the 26^th Floor at 595 Burrard Street, Three Bentall Centre, Vancouver, BC, V7X 1L3. The Company is listed on the Nasdaq Capital Market (“Nasdaq”) under the symbol “EPIX”.

The Company is focused on the development of small molecule drugs for the treatment of prostate cancer. The Company has acquired a license to certain patents (“NTD”) which were the joint property of the British Columbia Cancer Agency and the University of British Columbia. As of December 31, 2021, no products are in commercial production or use.

2.     BASIS OF PRESENTATION

Basis of Presentation

These accompanying unaudited condensed consolidated interim financial statements, including comparatives, have been prepared in accordance with United States’ Generally Accepted Accounting Principles (“U.S. GAAP”) and pursuant to the rules and regulations of the United States Securities and Exchange Commission (“SEC”) for interim financial information. Accordingly, these condensed consolidated interim financial statements do not include all of the information and footnotes required for complete consolidated financial statements and should be read in conjunction with the audited consolidated financial statements and notes for the year ended September 30, 2021 and included in the Company’s 2021 Annual Report on Form 10-K filed with the SEC and with the securities commissions in Alberta and Ontario on November 18, 2021.
​

These unaudited condensed consolidated interim financial statements reflect all adjustments, consisting of normal recurring adjustments, which, in the opinion of management, are necessary for a fair presentation of results for the interim periods presented. The results of operations for the three months ended December 31, 2021 and 2020 are not necessarily indicative of results that can be expected for a full year. These unaudited condensed consolidated interim financial statements follow the same significant accounting policies as those described in the notes to the audited consolidated financial statements of the Company included in the Company’s 2021 Annual Report on Form 10-K for the year ended September 30, 2021, with the exception of the policies described in Note 3.

These accompanying unaudited condensed consolidated interim financial statements include the accounts of the Company and its wholly owned subsidiaries. Inter-company transactions, balances and unrealized gains or losses on transactions are eliminated upon consolidation.

The accompanying condensed consolidated interim financial statements have been prepared on a historical cost basis except for certain financial assets measured at fair value.

All amounts expressed in these accompanying condensed consolidated interim financial statements and the accompanying notes are expressed in United States dollars, except per share data and where otherwise indicated. References to “$” are to United States dollars and references to “C$” are to Canadian dollars.

13

Use of Estimates

The preparation of the accompanying condensed consolidated interim financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions about future events that affect the reported amounts of assets, liabilities, expenses, contingent assets and contingent liabilities as of the end of, or during, the reporting period. Actual results could significantly differ from those estimates. Significant areas requiring management to make estimates include the derivative liabilities, the valuation of equity instruments issued for services, income taxes and the product development and relocation grant. Further details of the nature of these assumptions and conditions may be found in the relevant notes to these condensed consolidated interim financial statements.

The effect of a change in an accounting estimate is recognized prospectively by including it in comprehensive income in the period of the change, if the change affects that period only, or in the period of the change and future periods, if the change affects both. Estimates and assumptions are reviewed quarterly.

3.     RECENT ACCOUNTING PRONOUNCEMENTS

Recent accounting pronouncements not yet adopted

ASU 2020-06 – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815-40)

In August 2020, the FASB issued ASU No. 2020-06 (“ASU 2020-06”) “Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity.” ASU 2020-06 will simplify the accounting for convertible instruments by reducing the number of accounting models for convertible debt instruments and convertible preferred stock. Limiting the accounting models will result in fewer embedded conversion features being separately recognized from the host contract as compared with current GAAP. Convertible instruments that continue to be subject to separation models are (1) those with embedded conversion features that are not clearly and closely related to the host contract, that meet the definition of a derivative, and that do not qualify for a scope exception from derivative accounting and (2) convertible debt instruments issued with substantial premiums for which the premiums are recorded as paid-in capital. ASU 2020-06 also amends the guidance for the derivatives scope exception for contracts in an entity’s own equity to reduce form-over-substance-based accounting conclusions. ASU 2020-06 will be effective January 1, 2024, for the Company. Early adoption is permitted, but no earlier than January 1, 2021, including interim periods within that year. Management is currently evaluating the effect of the adoption of ASU 2020-06 on the consolidated financial statements, but currently does not believe ASU 2020-06 will have a significant impact on the Company’s accounting.

ASU 2020-10 – Codification Improvements

In October 2020, the FASB issued ASU 2020-10, Codification Improvements. The guidance contains improvements to the Codification by ensuring that all guidance that requires or provides an option for an entity to provide information in the notes to financial statements is codified in the Disclosure Section of the Codification. The guidance also contains Codifications that are varied in nature and may affect the application of the guidance in cases in which the original guidance may have been unclear. For public business entities, the amendments in the ASU are effective for fiscal years beginning after December 15, 2020. For all other entities, the amendments are effective for annual periods beginning after December 15, 2021, and interim periods within annual periods beginning after December 15, 2022. Early adoption is permitted. We do not expect the adoption of ASU 2020-10 to have a material impact on our condensed consolidated financial statements.

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ASU 2021-04 – Earnings per share

In May 2021, the FASB issued ASU 2021-04, Earnings Per Share (Topic 260), Debt-Modifications and Extinguishments (Subtopic 470-50), Compensation-Stock Compensation (Topic 718), and Derivatives and Hedging-Contracts in Entity’s Own Equity (Subtopic 815-40).  The new ASU addresses issuer’s accounting for certain modifications or exchanges of freestanding equity-classified written call options. This amendment is effective for all entities, for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. Early adoption is permitted. The Company will evaluate the impact of the pronouncement closer to the effective date.

Recent accounting pronouncements issued by the FASB, including its Emerging Issues Task Force, the American Institute of Certified Public Accountants, and the Securities and Exchange Commission did not or are not believed by management to have a material impact on the Company’s present or future consolidated financial statement presentation or disclosures.

4.     SHORT-TERM INVESTMENTS

Short-term investments consist of guaranteed investment certificates (“GICs”) held at financial institutions purchased in accordance with the Company’s treasury policy. These GICs and term deposits bear interest at 0.20%-0.31% per annum and have maturities of up to 12 months.

5.     PREPAIDS

		December 31,		September 30,
	2021		2021
Prepaid insurance	$	1,276,479	$	1,751,052
Prepaid CMC and clinical expenses and deposits		428,696		240,513
Other deposits and prepaid expenses		42,365		190,317
Balance, end of period	$	1,747,540	$	2,181,882

6.     ACCOUNTS PAYABLE AND ACCRUED LIABILITIES

		December 31,		September 30,
	2021		2021
Accounts payable	$	1,562,511	$	1,425,871
Accrued expenses		1,635,272		2,062,441
Accrued vacation		326,807		320,632
Balance, end of period	$	3,524,590	$	3,808,944

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7.     OPERATING LEASE

Operating lease right-of-use asset
Balance, September 30, 2020	$	55,162
Amortization		(27,581)
Balance, December 31, 2020	$	27,581
Balance, September 30, 2021	$	308,286
Amortization		(30,447)
Balance, December 31, 2021	$	277,839
Operating lease liabilities
Balance, September 30, 2020	$	59,094
Accretion		1,181
Lease payments		(30,287)
Balance, December 31, 2020	$	29,988
Balance, September 30, 2021	$	330,970
Accretion		3,884
Lease payments		(32,373)
Balance, December 31, 2021	$	302,481

The Company recognizes a right-of-use asset for the right to use the underlying asset for the lease term, and a lease liability, which represents the present value of the Company’s obligation to make payments over the lease term. The present value of the lease payments is calculated using an incremental borrowing rate as the Company’s leases do not provide an implicit interest rate. At December 31, 2021, the Company’s incremental borrowing rate was 5.0% and the remaining lease term for the South San Francisco office was 29 months and Houston office was 19 months.

Accretion expense of $3,884 (2020 - $1,181) has been recorded in “general and administrative expenses” and “financing costs” in the condensed consolidated interim statements of operations and comprehensive loss respectively.

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8.     DERIVATIVE LIABILITIES

In January 2016, the Company completed a private placement of 227,273 units of the Company at $66.00 per unit (“Unit”) for gross proceeds of $14,999,992. Each Unit consisted of one common share of the Company, one 7-year cash and cashless exercise warrant (the “7-Year Warrants”), and one half of one 2-year cash exercise warrant (the “2-Year Warrants”). The 7-Year Warrants and 2-Year Warrants have an exercise price of $66.00 per common share (collectively, the “2016 Warrants”). The holders of the 7-Year Warrants may elect, in lieu of exercising the 7-Year Warrants for cash, a cashless exercise option, in whole or in part, to receive common shares equal to the fair value of the 7-Year Warrants based on the number of 7-Year Warrants to be exercised multiplied by a ten-day weighted average market price less the exercise price with the difference divided by the weighted average market price. If a warrant holder exercises this option, there will be variability in the number of shares issued per 7-Year Warrant.

Additionally, the 2016 Warrants contain provisions which may require the Company to redeem the 2016 Warrants, at the option of the holder, in the event of a major transaction, such as a change of control or sale of the Company’s assets (“Major Transaction”). The redemption value would be subject to a Black-Scholes valuation at the time of exercise. In the event the consideration for a Major Transaction payable to the common shareholders is in cash, in whole or in part, the redemption of the 2016 Warrants would be made in cash pro-rata to the composition of the consideration. The potential for a cash settlement for the 2016 Warrants outside the control of the Company, in accordance with U.S. GAAP, requires the 2016 Warrants to be treated as financial liabilities measured at fair value through profit or loss. The 2016 Warrants are not traded in an active market.

Valuation

The Company uses the Black-Scholes option pricing model to estimate fair value. The following weighted average assumptions were used to estimate the fair value of the derivative warrant liabilities on December 31, 2021 and 2020:

	December 31,		December 31,
	2021		2020
Risk-free interest rate	1.04	%	0.20	%
Expected life	1.03	years	2.03	years
Expected annualized volatility	95.4	%	81.1	%
Dividend	—		—
Liquidity discount	20	%	20	%

Sensitivity

The derivative warrants are a recurring Level 3 fair value measurement. The key level 3 inputs used by management to determine the fair value are the market price, expected volatility and liquidity discount. If the market price were to increase by a factor of 10% this would increase the obligation by approximately $37,989 as of December 31, 2021. If the market price were to decrease by a factor of 10% this would decrease the obligation by approximately $32,211 as of December 31, 2021. If the volatility were to increase by 10%, this would increase the obligation by approximately $60,397 as of December 31, 2021. If the volatility were to decrease by 10%, this would decrease the obligation by approximately $48,137 as of December 31, 2021.

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The following table is a continuity schedule of changes to the Company’s derivative liabilities:

	Total
Balance, September 30, 2020	$	127,376
Change in fair value		(89,130)
Balance, December 31, 2020	$	38,246
Balance, September 30, 2021	$	20,352
Change in fair value		99,318
Balance, December 31, 2021	$	119,670
Derivatives with expected life of less than one year	$	—
Derivatives with expected life greater than one year	$	119,670

9.     SHAREHOLDERS’ EQUITY

Authorized

Unlimited common shares, without par value.

Unlimited preferred shares, without par value.

February 2021 Financing

On February 22, 2021, the Company completed an underwritten public offering for aggregate gross proceeds of $149,999,985 (the “February 2021 Financing”). The Company issued a total of 5,555,555 common shares of the Company at a public offering price of $27.00 per share, which includes the underwriters having exercised their 30-day option to purchase an additional 724,637 common shares. In connection with the February 2021 Financing, the Company paid cash commissions of $8,999,999 and incurred other transaction costs of $229,451.

Nomination Rights

In connection with a January 2016 private placement of 227,273 Units, a Unit consisting of one common share, one 7-year warrant and one-half of one 2-year warrant, of the Company, Clarus Lifesciences III, L.P. (“Clarus”) acquired 106,061 common shares. Clarus is entitled to nominate two directors to the board of directors of the Company, one of which must be an independent director and preapproved by the Company. These nomination rights will continue for so long as Clarus holds greater than or equal to 53,030 common shares, subject to adjustment in certain circumstances.

Equity incentive plans

Restricted share units plan

The Company has adopted a Restricted Share Unit Plan (“RSU Plan”) consistent with the policies and rules of the Nasdaq. Pursuant to the RSU Plan, RSUs may be granted with vesting criteria and periods are approved by the Board of Directors at its discretion. The RSUs issued under the RSU Plan may be accounted for as either equity-settled or cash-settled share-based payments. At December 31, 2021, there are no RSUs outstanding.

As of December 31, 2021 the Stock Option Plan and RSU Plan have a combined maximum of 7,342,788 common shares which may be reserved for issuance.

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Employee Share Purchase Plan

The Company has adopted an Employee Share Purchase Plan (“ESPP”) under which qualifying employees may be granted purchase rights (“Purchase Rights”) to the Company’s common shares at not less of 85% of the market price at the lesser of the date the Purchase Right is granted or exercisable. The Company currently holds offerings consisting of six-month periods commencing on January 1 and July 1 and ending on June 30 and December 31 of each calendar year. As of December 31, 2021, the ESPP has a maximum of 249,974 (September 30, 2021 – 252,418) common shares reserved for issuance.

Eligible employees are able to contribute up to 15% of their gross base earnings for purchases under the ESPP through regular payroll deductions. Purchase of shares under the ESPP are limited for each employee at $25,000 worth of the Company’s common shares (determined using the lesser of (i) the market price of a common share on the first day of an applicable purchase period and (ii) the market price of a common share on the purchase date) for each calendar year in which a purchase right is outstanding.

During the three months ended December 31, 2021, the Company issued 2,444 shares (2020 – 5,261) upon the exercise of Purchase Rights. The Company recognizes compensation expense for purchase rights on a straight-line basis over the service period.

	For the three months
	ended December 31,
	2021			2020
Research and development expense	$	8,483	$	5,570
General and administrative		805		565
	$	9,288	$	6,135

The Company measures the purchase rights based on their estimated grant date fair value using the Black-Scholes option pricing model and the estimated number of shares that can be purchased. The following weighted average assumptions were used for the valuation of purchase rights:

	For the three months
	ended December 31,
	2021			2020
Risk-free interest rate		0.20	%	0.26	%
Expected life of share purchase rights		6 months		6 months
Expected annualized volatility		64.43	%	65.73	%
Dividend		—		—

Stock options

The Company has adopted a Stock Option Plan consistent with the policies and rules of the Nasdaq. Pursuant to the Stock Option Plan, options may be granted with expiry terms of up to 10 years, and vesting criteria and periods are approved by the Board of Directors at its discretion. The options issued under the Stock Option Plan are accounted for as equity-settled share-based payments.

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Stock option transactions are summarized as follows:

		Weighted
	Number	Average
	of Options	Exercise Price*
Balance, September 30, 2020	5,309,584	$	3.42
Options granted	1,889,646		9.87
Options exercised	(323,610)		(3.68)
Options expired/forfeited	(72,390)		(4.46)
Balance, September 30, 2021	6,803,230	$	5.20
Options granted	120,000		8.47
Options exercised	(29,080)		(3.61)
Options expired/forfeited	(104,584)		(3.18)
Balance outstanding, December 31, 2021	6,789,566	$	5.30
Balance exercisable, December 31, 2021	3,528,789	$	3.99

* Options exercisable in Canadian dollars as of December 31, 2021 are translated at current rates to reflect the current weighted average exercise price in US dollars for all outstanding options.

At December 31, 2021, options were outstanding enabling holders to acquire common shares as follows:

			Weighted average remaining
	Exercise price	Number of options	contractual life (years)
$	3.23	3,682,520	7.77
$	3.59	26,667	7.80
$	3.81	185,816	7.11
$	4.00	539,518	5.97
$	4.67	183,511	7.84
$	7.00	1,508,146	8.95
$	8.47	120,000	9.79
$	13.96	190,000	9.04
$	29.63	100,000	9.33
$	31.62	75,000	9.42
C$	4.90	146,157	5.49
C$	5.06	32,231	7.11
		6,789,566	7.93

Share-based compensation

During the three months ended December 31, 2021, the Company granted a total of 120,000 (2020 – 1,524,646) stock options with a weighted average fair value of $8.47 per option (2020 – $5.52).

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The Company recognized share-based payments expense for options granted and vesting, net of recoveries on cancellations of unvested options, during the three months ended December 31, 2021 and 2020 with allocations to its functional expense as follows:

	For the three months
	ended December 31,
	2021			2020
Research and development expense	$	1,250,868	$	281,854
General and administrative		1,239,935		916,996
	$	2,490,803	$	1,198,850

The following weighted average assumptions were used for the Black-Scholes option-pricing model valuation of stock options granted:

	2021			2020
Risk-free interest rate		0.86	%	0.39	%
Expected life of options		10.00	years	10.00	years
Expected annualized volatility		80.00	%	78.00	%
Dividend		—		—

Warrants

Warrant transactions are summarized as follows:

		Weighted
	Number	Average
	of Warrants	Exercise Price
Balance, September 30, 2020	9,272,977	$	1.73
Warrants exercised	(6,038,227)		(0.06)
Balance outstanding and exercisable, September 30, 2021 and December 31, 2021	3,234,750	$	4.84

At December 31, 2021, warrants were outstanding enabling holders to acquire common shares as follows:

Number
of Warrants		Exercise Price		Expiry Date
227,273	(1)	US$	66.00	January 14, 2023
7,477		US$	42.80	November 18, 2023
80,000		US$	4.00	January 9, 2023
2,920,000		US$	0.0001	August 23, 2024
3,234,750

(1) Detailed terms of the 2016 Warrants are included in Note 8.

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10.    RELATED PARTY TRANSACTIONS

Included in accounts payable and accrued liabilities at December 31, 2021 is $77,560 (September 30, 2021 - $82,036) due to related parties with respect to key management personnel compensation and expense reimbursements. Amounts due to related parties are non-interest bearing, with no fixed terms of repayment.

11.    SEGMENTED INFORMATION

The Company works in one industry being the development of small molecule drugs for prostate cancer. The Company’s right of use asset is located in the USA.

12.    FINANCIAL INSTRUMENTS AND RISK

The Company’s financial instruments consist of cash and cash equivalents, short-term investments, receivables, accounts payable and accrued liabilities and derivative liabilities. The fair value of cash and cash equivalents, short-term investments, receivables and accounts payable and accrued liabilities approximates their carrying values due to their short term to maturity. The derivative liabilities are measured using level 3 inputs (Note 8).

Fair value estimates of financial instruments are made at a specific point in time, based on relevant information about financial markets and specific financial instruments. As these estimates are subjective in nature, involving uncertainties and matters of judgement, they cannot be determined with precision. Changes in assumptions can significantly affect estimated fair values.

Financial risk factors

The Company’s risk exposures and the impact on the Company’s financial instruments are summarized below:

Credit risk

Financial instruments that potentially subject the Company to a significant concentration of credit risk consist primarily of cash and cash equivalents, short-term investments and receivables. The Company limits its exposure to credit loss by placing its cash with major financial institutions. The Company considers highly liquid investments with a maturity of up to twelve months when purchased to be short-term investments. As of December 31, 2021, cash and cash equivalents consisted of cash in Canada and the United States and term deposits in Canada. Balances exceed amounts insured by the Canada Deposit Insurance Corporation for up to C$100,000 and by the Federal Deposit Insurance Corporation for up to $250,000. Amounts due from government agencies are considered to have minimal credit risk.

Liquidity risk

The Company’s approach to managing liquidity risk is to ensure that it will have sufficient liquidity to meet liabilities when due. As of December 31, 2021, the Company had working capital of $187,291,085. The Company does not generate revenue and will be reliant on external financing to fund operations. Debt and equity financing are dependent on market conditions and may not be available on favorable terms.

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Market risk

Market risk is the risk of loss that may arise from changes in market factors such as interest rates, and foreign exchange rates.

(a)Interest rate risk

As of December 31, 2021, the Company has cash and cash equivalents balances and GICs which are interest bearing. Interest income is not significant to the Company’s projected operational budget and related interest rate fluctuations are not significant to the Company’s risk assessment.

(b)Foreign currency risk

The Company’s foreign currency risk exposure relates to net monetary assets denominated in Canadian dollars, UK pound and Euro. The Company maintains its cash and cash equivalents in US dollars and converts on an as needed basis to discharge Canadian denominated expenditures. A 10% change in the foreign exchange rate between the Canadian dollar, UK Pound, Euro and U.S. dollar in relation to Canadian dollar, UK Pound, Euro dollars held at December 31, 2021 would result in a fluctuation of $23,270 in the net loss recognized for the period. The Company does not currently engage in hedging activities.

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Item 2.     Management’s Discussion and Analysis of Financial Condition and Results of Operation

The following discussion should be read in conjunction with the attached financial statements and notes thereto. This Quarterly Report on Form 10-Q, including the following sections, contains forward-looking statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995. These statements are subject to risks and uncertainties that could cause actual results and events to differ materially from those expressed or implied by such forward-looking statements. For a detailed discussion of these risks and uncertainties, see “Risk Factors” in our Annual Report on Form 10-K. We caution the reader not to place undue reliance on these forward-looking statements, which reflect management’s analysis only as of the date of this Quarterly Report on Form 10-Q. We undertake no obligation to update forward-looking statements to reflect events or circumstances occurring after the date of this Quarterly Report on Form 10-Q. Throughout this discussion, unless the context specifies or implies otherwise, the terms “ESSA,” “the Company,” “we,” “us,” and “our” refer to ESSA Pharma Inc. and its subsidiaries. For a discussion regarding our financial condition and results of operations for fiscal 2021 as compared to fiscal 2020 see Item 7 of our Annual Report on Form 10-K for the fiscal year ended September 30, 2021, filed with the SEC on November 18, 2021.

Overview

ESSA is a clinical stage pharmaceutical company, focused on developing novel and proprietary therapies for the treatment of prostate cancer with an initial focus on patients whose disease is progressing despite treatment with current standard of care therapies, including second-generation antiandrogen drugs such as abiraterone, enzalutamide, apalutamide, and darolutamide. The Company believes its latest series of investigational compounds, including its product candidate EPI-7386, have the potential to significantly expand the interval of time in which patients with castration-resistant prostate cancer (“CRPC”) can benefit from anti-hormone-based therapies. Specifically, the compounds are designed to disrupt the androgen receptor (“AR”) signaling pathway, the primary pathway that drives prostate cancer growth and prevent AR activation through selective binding to the N-terminal domain (“NTD”) of the AR. In this respect, the Company’s compounds are designed to mechanistically differ from classical non-steroid antiandrogens. These antiandrogens interfere either with androgen synthesis (i.e., abiraterone), or with the binding of androgens to the ligand-binding domain (“LBD”), located at the opposite end of the receptor from the NTD (i.e., “lutamides”). A functional NTD is essential for the functionality of the AR; blocking the NTD inhibits AR-driven transcription and therefore androgen-driven biology.

The Company believes that the transcription inhibition mechanism of its preclinical compounds is unique and has the potential advantage of bypassing several of the identified mechanisms of resistance to the antiandrogens currently used in the treatment of CRPC. The Company has been granted by the United States Adopted Names ("USAN") Council a unique USAN stem "-aniten" to recognize this new first-in-class mechanistic class. The Company refers to this series of proprietary investigational compounds as the “aniten” series. In preclinical studies, blocking the NTD has demonstrated the capability to prevent AR-driven gene expression. A previously completed Phase I clinical trial of ESSA’s first-generation agent, ralaniten acetate (“EPI-506”) administered to patients with metastatic CRPC (“mCRPC”) refractory to current standard of care therapies demonstrated prostate-specific antigen (“PSA”) declines, a sign of inhibition of AR-driven biology. This inhibition, however, was neither deep nor sustained enough to confer clinical benefit and the Company made the decision to develop a more potent next generation drug which would also have a longer half-life. The Company has done so and is now in clinical trial with this next generation aniten, EPI-7386.

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According to the American Cancer Society, in the United States, prostate cancer is the second most frequently diagnosed cancer among men, behind skin cancer. Approximately one-third of all prostate cancer patients who have been treated for local disease with curative intent will subsequently have rising serum levels of PSA, which is an indication of recurrent disease with or without development of distant metastasis. Patients with recurrent disease as indicated by rising PSA usually undergo initial androgen ablation therapy using analogues of luteinizing hormone releasing hormone or surgical castration; this approach is termed “androgen deprivation therapy” (“ADT”). Most of these patients initially respond to this androgen ablation therapy; however, many experience a recurrence in tumor growth despite the reduction of testosterone to castrate levels, and at that point are considered to have CRPC. Following diagnosis of CRPC, patients have been generally treated with antiandrogens that block the binding of androgens (darolutamide, enzalutamide, apalutamide or bicalutamide) to the AR, or inhibit synthesis of androgens (abiraterone). More recently, significant improvements in progression free survival and overall survival have been achieved by utilizing this latest generation of antiandrogens in combination with ADT earlier in the disease natural history (i.e HSPC and nmCRPC).

Since the mid-20th century, it has been recognized that the growth of prostate tumors is in large part mediated by an activated AR. Generally, there are three means of activating the AR. First, androgens such as dihydrotestosterone can activate AR by binding to its LBD. Second, CRPC can be driven by variants of AR that lack an LBD, are constitutively activated, and consequently do not require androgen for activation. A third mechanism, of less certain clinical significance, may involve certain signaling pathways that activate AR independent of androgen activity. Generally, current drugs for the treatment of prostate cancer are directed against the first mechanism by either (i) interfering with the production of androgen, or (ii) preventing androgen from binding to the LBD. Over time, these approaches eventually fail due to mechanisms of resistance which involve the LBD end of the receptor, whether at the DNA (AR amplification or LBD mutations) or RNA level (emergence of AR splice variants). With respect to the development of alternative pathway mechanisms of AR activation, tumors might also be insensitive to anti-androgen activity. Finally, in patients who have been treated for years with various anti-androgen therapies, genomic changes may lead to additional, non-AR-related oncogenic drivers, also insensitive to inhibition of AR biology.

The Company believes that through their potential to block androgen-driven gene transcription by using a unique mechanism involving the NTD and thereby bypassing these known mechanisms of resistance to current antiandrogens, the aniten series of compounds hold the potential to be effective in cases where LBD-based mechanisms of resistance to second generation antiandrogens in otherwise AR-driven disease are operating. The results from both extensive preclinical studies and the initial clinical experience support the Company’s belief. In preclinical studies, the aniten series of compounds has been observed to shrink AR-dependent prostate cancer xenografts, including tumors both sensitive and resistant to the second-generation antiandrogens such as enzalutamide. Plasma PSA level declines were observed in the initial results of the Phase I study of EPI-7386 as described below. Importantly with respect to the potential clinical application of NTD inhibition, recent studies by the Company and its collaborators have also suggested the potential advantage for combinations of the Company’s aniten compounds with currently approved antiandrogens to inhibit AR-driven biology more completely than AR inhibition from either end of the receptor alone. This hypothesis is supported by the clinical trial results obtained in recent years of the superior overall survival obtained with initial combination therapy with ADT and latest generation anti-androgens relative to the administration of these two therapies sequentially.

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The Phase I clinical trial of the first generation aniten EPI-506 provided evidence regarding the safety and tolerability for the potential mechanism of transcription inhibition of AR-driven biology. Patients generally tolerated doses of EPI-506 at overall exposures consistent with those associated with therapeutic activity in animal models. Possible proof of concept was observed with short duration PSA declines of up to 37% being observed in some patients whose disease was highly refractory to second-generation antiandrogen treatment. However, this first-generation drug demonstrated poor pharmaceutical properties. The drug was rapidly metabolized in humans, leading to a very short half-life of circulating drug and suboptimal drug exposures. Consequently, very high doses were required to achieve modest drug exposures, with the relatively short half-life limiting the therapeutic exposure of the drug within a 24-hour period. This limitation, together with other demonstrated unfavorable pharmaceutical properties, led to the Company’s decision to discontinue EPI-506 development in favor of focusing on the development of a next generation of anitens. This next generation includes significantly more potent drugs designed also to exhibit increased resistance to metabolism and therefore a longer predicted circulating half-life. The Company’s lead product candidate EPI-7386 has demonstrated these and other favorable characteristics in extensive preclinical characterization studies which the Company has presented in a series of poster presentations at scientific meetings over the last two years.

While the potential importance of the NTD as a drug target has been appreciated for more than two decades, for technical reasons this has been a difficult target for therapeutic agent development. The NTD of the AR is flexible with a high degree of intrinsic disorder making it difficult for use in classic crystal structure-based drug design. The Company is not currently aware of any clinical-stage NTD AR inhibitors that are in development by other drug development companies. The nature of the highly specific binding of the aniten compounds to the NTD, and the biological consequences of that binding, have been defined in recent scientific studies. The selectivity of the binding, based on in vivo imaging as well as in vitro studies, has been consistent with the favorable toxicological results observed in preclinical studies of the first-generation EPI-506 and the subsequent safety results observed in the Phase I trial of EPI-506. The Company has completed a series of biophysical and biological studies revealing the interaction and binding of EPI-7386 to the NTD of the AR and presented these findings at several medical conferences in 2021. 

The incidence of both metastatic and non-metastatic CRPC continues to rise, and using a dynamic progression model, Scher et al.¹ projected a 2020 incidence of 546,955 and prevalence of 3,072,480. The Company believes that the aniten series of compounds could ultimately hold potential benefit for many of those patients. In its early clinical development, the Company intends to initially focus on patients who have failed second-generation antiandrogen therapies (i.e. abiraterone and/or lutamides) for the following reasons:

● CRPC treatment remains a prostate cancer market segment with an apparent and significant unmet therapeutic need and is therefore a potentially large market;

● the Company believes that the unique mechanism of action of its aniten compounds is well suited to treat those patients who have failed AR LBD focused therapies and whose biological characterization reveals that their tumors are still largely driven by AR biology; and

● the Company expects that the relatively large number of patients with an apparent unmet therapeutic need in this area will facilitate timely enrollment in its clinical trials.

¹ Scher HI, Solo K, Valant J, Todd MB, Mehra M (2015) Prevalence of Prostate Cancer Clinical States and Mortality in the United States: Estimates Using a Dynamic Progression Model. PLoS ONE 10(10): e0139440. doi:10.1371/journal.pone.013944

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Furthermore, the Company believes that a successful Phase I clinical trial will facilitate the early study of the combination of EPI-7386 with second-generation antiandrogens. The Company and its collaborators have developed preclinical in vitro and in vivo evidence supporting further evaluation of the combination of NTD inhibitors together with the LBD inhibiting antiandrogens. The Company believes that the application of two independent, complementary mechanisms of AR transcription inhibition may result in greater suppression of androgen activity and the delay or prevention of drug resistance. Recent progress in the clinical treatment of prostate cancer has resulted from the earlier utilization of antiandrogens in combination with classic ADT, consistent with the premise that more effective androgen suppression may yield clinical benefit. The Company believes that the introduction of NTD inhibitors such as EPI-7386 therefore has potential to improve androgen suppression, delay the emergence of resistance, and result in improved clinical benefit. The first collaboration, with Janssen Research & Development, LLC (“Janssen”), to study in clinical trials the safety and potential benefit of combination of EPI-7386 with abiraterone acetate with prednisone as well as the combination of EPI-7386 with apalutamide was announced January 13, 2021. A second collaboration and supply agreement with Astellas Pharma Inc. (“Astellas”) to evaluate EPI-7386 in combination with Astellas and Pfizer Inc.’s androgen receptor inhibitor, enzalutamide, in patients with metastatic castration-resistant prostate cancer (“mCRPC”) was announced on February 24, 2021. A third collaboration and supply agreement with Bayer Consumer Care AG (“Bayer”) to evaluate EPI-7386 in combination with Bayer’s androgen receptor inhibitor, darolutamide, in patients with mCRPC was announced on April 28, 2021.

The Company is party to a license agreement with the British Columbia Cancer Agency and the University of British Columbia dated December 22, 2010, as amended on February 10, 2011, May 27, 2014, and May 25, 2021 (the “License Agreement”), which provides the Company with exclusive world-wide rights to the issued patents and patent applications related to the EPI 002 and the EPI-7386 compounds.

The Company believes that it has developed a strong and defensive intellectual property position for aniten structural classes. As of January 2022, ESSA owns rights to 47 issued patents, including 12 issued U.S. patents, that are in force and cover multiple EPI- and aniten structural classes of compounds with different structural motifs/analogues. As of January 2022, 4 of these issued patents cover the EPI-7386 compound and are expected to provide protection until 2036 to 2039. Patent applications are also pending in the United States and in contracting states to the Patent Cooperation Treaty for the aniten next-generation NTD inhibitors, with expected expiration dates between 2036-2041.

Completed Phase I Clinical Study of EPI-506

The Company conducted an initial proof-of-concept Phase I clinical study utilizing the first-generation aniten compound, EPI-506. The objective of the EPI-506 Phase I clinical trial was to explore the safety, tolerability, maximum tolerated dose and pharmacokinetics of EPI-506, in addition to anti-tumor activity in asymptomatic or minimally symptomatic patients with mCRPC who were no longer responding to either abiraterone or enzalutamide treatments, or both. Efficacy endpoints, such as PSA reduction, and other disease progression criteria were evaluated. Details relating to the design of the Phase I/II clinical trial of EPI-506 are available on the U.S. National Institutes of Health clinical trials website (see https://clinicaltrials.gov).

The Investigational New Drug (“ IND”) application to the FDA for EPI-506, to begin a Phase I clinical trial, was allowed in September 2015, with the first clinical patient enrolled in November 2015. The Company’s Clinical Trial Application (“CTA”) submission to Health Canada was subsequently also cleared. Based on allometric scaling, an initial dose level of EPI-506 of 80 mg was determined. However, following the enrollment of the initial cohorts, it became apparent that EPI-506 exposure was much lower in humans than projected. EPI-506 dosing was escalated aggressively to allow patients in the clinical study greater exposure to the drug. The highest dose patients ultimately received was 3600 mg of EPI-506, administered in a single dose or split into two doses daily. The initial data from the Phase I clinical trial was presented at the European Society of Medical Oncology meeting in September 2017.

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Conducted at five sites in the United States and Canada, the open-label, single-arm, dose-escalation study evaluated the safety, pharmacokinetics, maximum-tolerated dose and anti-tumor activity of EPI-506 in men with end-stage mCRPC who had progressed after prior enzalutamide and/or abiraterone treatment and who may have received one prior line of chemotherapy. Twenty-eight patients were available for analysis, with each patient having received four or more prior therapies for prostate cancer at the time of study entry. Patients self-administered oral doses of EPI-506 ranging from 80 mg to 3600 mg, with a mean drug exposure of 85 days (range of eight to 535 days). Four patients underwent prolonged treatment (with a median of 318 days; and a range of 219 to 535 days at data cut-off), following intra-patient dose escalation. PSA declines, a measure of potential efficacy, ranging from 4% to 37% were observed in five patients, which occurred predominantly in the higher dose cohorts (≥1280 mg).

EPI-506 was generally well-tolerated with favorable safety results observed across all doses up to 2400 mg. At a dose of 3600 mg, gastrointestinal adverse events (nausea, vomiting and abdominal pain) were observed in two patients: one patient in the once-daily (“QD”) dosing cohort and one patient in the 1800 mg twice-daily dosing cohort, leading to study discontinuation and a dose-limiting toxicity (“DLT”) due to more than 25% of doses being missed in the 28-day safety reporting period. A separate patient in the 3600 mg QD cohort experienced a transient Grade 3 increase in liver enzymes (AST/ALT), which also constituted a DLT, and enrollment was consequently concluded in this cohort.

Although the Company believes that the safety results and possible signs of anti-tumor activity observed at higher dose levels support the concept that inhibiting the AR-NTD may provide a clinical benefit to mCRPC patients, the pharmacokinetic and metabolic studies revealed the limitations of the first generation agent EPI-506. Through its discovery research the Company had concluded that it should be feasible to develop a next generation of NTD inhibitor which would demonstrate greater potency, reduced metabolism and other improved pharmaceutical properties. As a result, the Company announced on September 11, 2017 its decision to discontinue the further clinical development of EPI-506 and to implement a corporate restructuring plan to focus research and development resources on its next-generation anitens targeting the AR-NTD. The restructuring included a decrease in headcount and a reduction of operational expenditures related to the clinical program.

Phase I Clinical Study of EPI-7386

The Company’s family of next-generation investigational aniten compounds incorporate multiple chemical scaffold changes to the first-generation drugs which in preclinical studies retain NTD inhibition of the AR. In addition, they have shown improvement in a range of attributes when compared to the first-generation compound, EPI-506, in preclinical studies. In in vitro assays measuring inhibition of AR transcriptional activity, these product candidates demonstrated 20 times higher potency than EPI-506 or its active metabolite, EPI-002. In addition, the compounds have demonstrated increased metabolic stability in preclinical studies, suggesting the potential for longer half-lives in humans. Lastly, the compounds have demonstrated more favorable pharmaceutical properties relative to EPI-506. The Company believes that these product candidates, if successfully developed and approved, may offer advancements in ease and cost of large-scale manufacture, drug product stability, and suitability for commercialization globally. From this series of next-generation compounds, EPI-7386 was selected as the lead candidate for clinical development and an IND was submitted to the FDA on March 30, 2020 and was allowed by the FDA on April 30, 2020. A CTA was filed with Health Canada in April 2020 and clearance was subsequently received. The Phase I clinical trial of EPI-7386 “Oral EPI-7386 in Patients With Metastatic Castration-Resistant Prostate Cancer (EPI-7386)” was started in June 2020 with the first patient dosed in July 2020 and is currently actively enrolling patients (www.clinicaltrials.gov). In September 2021 the Company filed a protocol amendment with the FDA to focus further monotherapy development in less heavily pretreated patients with mCRPC. The Company has presented preclinical and clinical scientific data relative to EPI-7386 in a number of poster presentations at scientific meetings in the past year.

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Our Strategy

The Company’s initial therapeutic goal is to develop a safe and effective therapy for prostate cancer patients whose tumors have progressed on current antiandrogen therapy while remaining prevalently driven by the AR pathway. However, preclinical studies suggest the potential of the Company’s aniten compounds to increase therapeutic activity when combined with antiandrogens at the earlier stage of the disease. Therefore, while the Company’s initial priority is to continue Phase I clinical development of EPI 7386 as a single agent, in parallel the Company has also been conducting preclinical studies in collaboration with industry and academic institutions. In addition, the Company has developed collaborations with the relevant pharmaceutical companies in the prostate cancer space for the conduct of clinical trials of combination therapies in earlier line of treatment for patients with mCRPC. The Company’s intent to support these collaborative clinical trials with Janssen, Astellas, and Bayer have been announced. The first of these studies, involving the combination of EPI-7386 with enzalutamide, is being conducted in collaboration with Astellas and Pfizer. ESSA will operationally conduct this trial, with an initial Phase I dose equilibration phase following by a randomized Phase 2 trial involving a planned 120 patients. The enzalutamide for this trial will be supplied by Astellas. The first patient in this Phase 1 / 2 study was dosed in January 2022. Combination trials with abiraterone acetate with prednisone, and with apalutamide will be conducted by Janssen and and are expected to be initiated around the middle of the first half of calendar 2022, and a combination clinical trial with darolutamide is expected to be initiated by Bayer thereafter. From the preclinical perspective, the Company together with collaborators is further exploring other potential applications for AR-NTD inhibitors, including breast cancer and other AR-associated cancers.

The identification and characteristics of the IND candidate EPI-7386

The purpose of the next-generation program has been to identify drug candidates with increased potency, reduced metabolic susceptibility and superior pharmaceutical properties compared to ESSA’s first-generation compounds. Structure-activity relation studies conducted on the chemical scaffold of ESSA’s first-generation compounds have resulted in the generation of a new series of compounds that have demonstrated higher potency and predicted longer half-lives. Multiple changes in the chemical scaffold have also been incorporated with the goal of improving ADME (absorption, distribution, metabolism, and excretion) and pharmaceutical properties of the chemical class.

Several next-generation aniten molecules met prespecified preclinical target product profile goals regarding potency, stability, selectivity and pharmaceutical properties. On March 26, 2019, the Company announced the nomination of EPI-7386 as its lead clinical candidate for the treatment of mCRPC through inhibition of the NTD of the androgen receptor. In preclinical studies, EPI-7386 has displayed activity in vitro in numerous AR-dependent prostate cancer models including models where second-generation antiandrogens are inactive. In addition, EPI-7386 is significantly more potent, metabolically stable and more effective in preclinical studies compared to ESSA’s first-generation compound, EPI-506. Lastly, EPI-7386 has demonstrated a favorable tolerability profile in all animal studies of the compound conducted to date.

Following IND-enabling studies, ESSA filed an IND for EPI-7386 in mCRPC at the end of the first calendar quarter of 2020, and following the receipt of clearance by the FDA and allowance by Health Canada, commenced clinical testing of EPI-7386 in July 2020, allowing for accommodations to the planned timeline as a result of the impact of the COVID-19 situation at individual clinical trial sites (see “Risk Factors - Risks Relating to COVID-19” in our Annual report on Form 10-K).

Advancing EPI-7386 through clinical development and regulatory approval in CRPC patients

The Company is conducting an open-label, dose-escalation Phase I clinical trial to determine the safety, tolerability, pharmacokinetics, maximum tolerated dose and/or recommended phase 2 dose (“RP2D”), and potential therapeutic benefits of the drug in mCRPC patients, who are refractory to standard-of-care treatments. The design of the Phase I clinical trial includes the standard 3+3 design per dose cohort for the Part 1a dose escalation phase, with subjects receiving a daily oral dose of EPI-7386 until there is objective evidence of clinical disease progression, and or occurrence of an unacceptable toxicity. The Part 1b dose expansion phase will commence when the RP2D is determined.

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Patients for the Part 1a are initially selected clinically, on the basis of having progressive metastatic CRPC as exemplified by rising PSA values and/or radiological disease progression despite latest generation antiandrogen treatment. However, all patients are also retrospectively biologically characterized for underlying tumor genomic characteristics, for evidence of AR pathway activation and during the conduct of the trial, for dose-related biological, pharmacological and pharmacodynamic effects. The goal of the dose escalation phase is to establish a RP2D which will be confirmed by the treatment of a larger group of patients treated at this optimal dose.

Once the Phase I clinical trial is complete, the Company plans to review the totality of the data, including the safety, tolerability, evidence of efficacy and pharmacological and biomarker data. This overall experience will inform the final size, design, and timing of a Phase II clinical trial, and importantly, the clinical as well as biological characteristics of the patients with mCRPC considered most likely to benefit from this therapeutic approach despite the late stage of their disease. Subsequent Phase II and additional clinical trials, including trials of combination aniten/lutamide therapy in earlier lines of treatment, should benefit from this initial clinical trial experience.

The Company has presented preclinical scientific data relative to EPI-7386 in a number of poster presentations at scientific meetings.

At the 32nd EORTC-NCI-AACR Annual Symposium on Molecular Targets and Cancer Therapeutics (“ENA”) on October 24, 2020, an oral poster presentation titled, “The preclinical characterization of the N-terminal domain androgen receptor inhibitor, EPI-7386, for the treatment of prostate cancer,” presented new information about EPI-7386 including: (i) in an in vitro cellular thermal shift assay (CETSA), EPI-7386 was shown to physically interact with the both the full-length and the splice variant (AR-V7) form of the androgen receptor (“AR”) (ii) in an in vitro full-length AR-driven cellular model (LNCaP), RNAseq data was analyzed by pathway enrichment analysis. EPI-7386 demonstrates largely similar modulation of AR-regulated genes compared to enzalutamide, but with additional unique elements; and (iii) EPI-7386 exhibits superior activity to enzalutamide in the AR-V7-driven cellular models LNCaP95 and 22Rv1 by modulating AR-driven gene expression with or without the addition of an external androgen.

Previously, in vitro data had been presented demonstrating that EPI-7386 binds to the full-length AR and can inhibit the transcription of AR-regulated genes. The new data demonstrate that EPI-7386 can also physically interact with the splice variant form, AR-V7, of the androgen receptor and inhibit its activity. The importance of this interaction with AR-V7 is seen through the superior transcriptional inhibition of AR-regulated genes by EPI-7386 compared to enzalutamide in the AR-V7-driven cell models LNCaP95 and 22Rv1. Together, these data provide insights into mechanistic aspects related to the binding and utility of EPI-7386 against AR-V7 splice-variant driven prostate cancer models. The data supports the Company’s rationale for studying EPI-7386 in men with prostate cancer resistant to current antiandrogens.

On February 11, 2021, the Company presented preclinical and clinical pharmacology data from ESSA’s Phase 1 clinical trial of EPI-7386 for the treatment of patients with metastatic castration-resistant prostate cancer (“mCRPC”) at the 2021 American Society of Clinical Oncology Genitourinary (“ASCO GU”) Cancers Symposium in an oral poster presentation titled, “Preclinical and clinical pharmacology of EPI-7386, an androgen receptor N-terminal domain inhibitor for castration-resistant prostate cancer.” The poster is available on the Company website.

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Data on the poster included a comparison of preclinical projections of EPI-7386 clinical pharmacokinetic parameters to the pharmacokinetic, safety and preliminary clinical data from the initial 200 mg cohort of patients enrolled in ESSA’s multi-center, open-label, ascending multiple-dose Phase 1 study of EPI-7386 to treat patients with mCRPC who have become resistant to standard of care treatments. Patients participating in this trial have progressed on two or more approved systemic therapies for mCRPC, including at least one second generation antiandrogen therapy not necessarily in the metastatic disease setting. In this initial cohort of patients receiving the 200 mg once-daily dose, EPI-7386 was well-tolerated with no SAEs observed. The results from this cohort support ESSA’s preclinical projections regarding the pharmacologic properties of EPI-7386 in humans. EPI-7386 was well-absorbed, demonstrated high exposure levels and was confirmed to have a long half-life of at least 24 hours. The predicted exposures of EPI-7386 in patients at that 200 mg dose level were similar to the Company’s modeled projections and were still below optimal target exposures of EPI-7386 associated with anti-tumor activity in animal models. Although the 200 mg dose exposure was suboptimal, one out of three patients who completed 12 weeks of therapy experienced a prostate specific antigen (“PSA”) decline of more than 50 percent after three cycles of EPI-7386 therapy (12 weeks) with ongoing continued PSA declines continuing through seventeen cycles of therapy, despite previously having failed enzalutamide and abiraterone acetate.

At the 2021 American Association of Cancer Research (AACR) Annual Meeting, which took place virtually April 10-15, 2021, ESSA presented an e-poster presentation titled, “Comprehensive in vitro characterization of the mechanism of action of EPI-7386, an androgen receptor N-terminal inhibitor.” The content of this poster added to previously presented data that EPI-7386 binds to the full-length androgen receptor, inhibits the transcription of AR-regulated genes, and physically interacts with the splice variant form AR-V7, by demonstrating that EPI-7386 can prevent the androgen receptor from binding to genomic DNA and is active against additional androgen receptor splice variants, including AR-v567es. These preclinical data suggest EPI-7386 can potentially inhibit AR related transcription, a key driver of prostate cancer, and further supports the ongoing Phase 1 dose escalation study.

The data also showed that EPI-7386, in combination with enzalutamide, may result in broader and deeper inhibition of the AR pathway, underscoring the potential clinical benefit of combining EPI-7386 with current standard-of-care antiandrogen therapies for prostate cancer patients at earlier stages of the disease.

On October 7, 2021 at the 2021 AACR-NCI-EORTC Virtual International Conference on Molecular Targets and Cancer Therapeutics the Company presented a virtual poster of preclinical data confirming EPI-7386’s target engagement with the NTD of the androgen receptor, the primary driver of prostate cancer growth. The multiple studies showed (i) three separate orthogonal NMR approaches confirm that EPI-7386 binds to the Tau5 region of the NTD; (ii) cellular thermal shift assays (CETSA) confirm engagement of EPI-7386 with both full length AR (AR-FL) and AR-V567es, a splice variant lacking the ligand-binding domain (LBD); (iii) gene expression driven by the AR splice variant, AR-V567es, can be inhibited by EPI-7386 whereas enzalutamide and darolutamide, which bind to the LBD, cannot inhibit AR-V567es-driven gene expression; and (iv) chromatin immunoprecipitation sequencing (ChIP-Seq) data indicate that EPI-7386 inhibits androgen-induced changes at the AR cistrome and when combined with enzalutamide, can completely abrogate genome-wide androgen-induced AR binding.

Additionally, the data demonstrated that the combination of EPI-7386 with enzalutamide results in complete inhibition of genome-wide androgen-induced AR binding, supporting the rationale for the upcoming Phase 1/2 combination trials of EPI-7386 with approved antiandrogens in patients with metastatic castration-resistant prostate cancer.

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The Company believes these results from the initial clinical data and ongoing in vitro studies are encouraging and suggest a favorable pharmacokinetic profile of EPI-7386 in patients. The Company believes the data demonstrate proof of concept by suggesting that EPI-7386, through its novel mechanism of action of targeting the N-terminal domain, may bypass the resistant mechanisms in at least a subset of mCRPC patients in whom the disease continues to remain AR-dependent despite progression on current antiandrogen therapies. While early in the Phase 1 clinical study, the Company is encouraged to have seen early signs of biological activity and declining PSA levels in a multi-refractory patient at the initial 200 mg dose as presented at the February 11, 2021 ASCO-GU meeting. EPI-7386 continues to be safe, well-tolerated, with generally good drug exposures, and adverse-events typical of those associated with antiandrogen therapy. Patients are currently being dosed at 600 mg, 800 mg, and 1,000 mg QD, with each of these dose levels being cleared as safe and tolerable. Given the favorable tolerability of the drug and the wide therapeutic window seen in preclinical studies, the Company is enrolling additional dose cohorts using a twice daily (BID) dosing schedule, commencing with 400 mg dose level, to further enhance patient drug exposures. The protocol amendment filed with the FDA in September 2021 allows for monotherapy development in less heavily pretreated patients in whom the Company believes the androgen receptor pathway continues to be the primary driver of tumor growth. The Company’s goal is to establish a recommended Phase 2 dose (“RP2D”) for monotherapy during the first half of 2022 based on multiple inputs, including pharmacokinetic and biological observations, in addition to clinical experience, and commence the expansion Phase 1b study soon thereafter in earlier, less heavily pre-treated and more biologically characterized patients. It is expected that a clinical readout of the Phase 1a monotherapy trial will be presented in the first half of calendar 2022.

Developing a product candidate as an essential component of a new standard of care for the treatment of pre-CRPC and expanding usage earlier in the disease stage

An activated AR is required for the growth and survival of most prostate cancer. Unlike current antiandrogen therapies which can only inhibit full-length AR, NTD inhibition of AR-directed biology occurs both in full length AR and splice variant ARs. Therefore, the Company believes that the AR-NTD is an ideal target for next-generation antiandrogen hormone therapy. If ESSA’s product candidate is successful in treating CRPC patients, it is reasonable to expect that such clinical candidate may be effective in treating earlier stage patients. Preclinical studies suggest particular value to the use of anitens in combination with the currently widely used antiandrogens. As a result, the Company intends to conduct additional clinical studies potentially leading to the approval of EPI-7386 for use in prostate cancer patients at an earlier disease stage in combination with second-generation antiandrogens. In this regard, the Company continues to develop in vitro and in vivo data in collaboration with academic investigators and clinical data with industry investigators as in the collaboration with Janssen to study EPI-7386 in combination clinical trials with abiraterone acetate/prednisone, as well as with apalutamide, and in the collaboration and supply agreement with Astellas to evaluate EPI-7386 in combination with Astellas and Pfizer Inc.’s enzalutamide, as well as in the collaboration and supply agreement with Bayer to evaluate EPI-7386 in combination with Bayer’s darolutamide, in patients with mCRPC. Preclinical data supporting this approach highlights the potential benefits of combining an NTD inhibitor, such as an aniten compound, with an antiandrogen that works through inhibition of the LBD of the AR by directly blocking androgen binding (e.g. lutamides) or by inhibiting androgen synthesis (abiraterone acetate). Other emerging potential clinical applications for NTD inhibitors are in combination with other agents, such as poly ADP ribose polymerase (“PARP”) inhibitors, Pin1 inhibitors, CDK4/6 inhibitors, as well as in the subset of metastatic breast cancer patients whose tumors have been demonstrated to have activation of the AR pathway.

Evaluating strategic collaborations to maximize value

The Company currently retains all commercial rights for its aniten series drug portfolio. The Company continues to evaluate potential collaborations that could enhance the value of its prostate cancer program and allow it to leverage the expertise of such strategic collaborators such as those with Janssen, Astellas, and Bayer.

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Future Clinical Development Program

Phase I/II Clinical Trial Design for treating CRPC patients

With the allowance by the FDA of the IND and clearance of the CTA by Health Canada for EPI-7386, the Company is conducting a Phase I, multi-dose escalation clinical trial to determine the safety, tolerability, maximum tolerated dose/recommended Phase 2 dose pharmacokinetics, and efficacy of the compound in refractory mCRPC patients at clinical sites in the US and Canada. The clinical trial is expected to enroll approximately 42 patients at multiple medical institutions in a standard 3+3 trial design with an approximate 12 additional patients enrolled in a dose expansion cohort at the recommended Phase 2 dose level. The Company is working with clinicals sites so patients can be enrolled ensuring compliance with COVID-19 risk management guidance as provided by FDA (see “Risk Factors - Risks Relating to COVID-19” in our Annual Report on Form 10-K). Learnings from the Phase I clinical trial of EPI-506 have been incorporated into the design and conduct of the Phase I study. The Company has included in the study design, for example, extensive biological characterization of the patients entered into the trial. Depending on the results of the Phase 1 study, a Phase II single arm clinical trial evaluating the activity of EPI-7386 single agent in a larger group of biologically-characterized mCRPC patients might be conducted.

In October 2021 the company disclosed the development of a collaboration with Caris Life Sciences, involving the incorporation of Caris’ newly developed cNAS (“circulating nucleic acid sequencing”) assay in the characterization of patients receiving EPI-7386. The Company believes that the characterization of real time individual patient biology will contribute significantly to understanding the extent to which individual patient’s tumors are still AR driven and what mechanisms of resistance exist.

Early Conduct of a Combination Phase I/II Clinical Trial

Given the evolution of prostate cancer therapeutics towards combination therapy strategies from the earlier stages of the disease, the biological rationale for combining NTD and LBD inhibitors, and compelling early in vitro and preclinical animal model results, the Company intends to perform combination studies of EPI-7386 with current generation antiandrogens. Since these combination studies will involve earlier lines of therapy, they will commence only after sufficient experience with safety, tolerability and efficacy has been accumulated with single agent EPI-7386 therapy in patients with metastatic disease resistant to standard of care treatments. Under the collaboration agreement with Janssen, Janssen will pay for and conduct two trials with EPI-7386 and each of their antiandrogens, apalutamide and abiraterone acetate, and ESSA will provide the clinical trial material of EPI-7386. Under the collaboration with Astellas, ESSA will pay for and conduct a trial with EPI-7386 and enzalutamide, with Astellas providing enzalutamide, and under the collaboration with Bayer, Bayer will pay for and conduct a clinical trial with EPI-7386 and darolutamide, with ESSA providing the clinical trial material EPI-7386.

Once the RP2D for each drug has been established, Phase 2 of the study will commence. Phase 2 is a two-arm, randomized (2:1), open-label study and is expected to enroll 120 mCRPC patients who have not yet been treated with second-generation antiandrogen therapies. The goal of the Phase 2 of the study is to evaluate the safety, tolerability and antitumor activity of EPI-7386 in combination with a fixed dose of enzalutamide compared with enzalutamide as a single agent. The combination studies being run by Janssen and Bayer are anticipated to begin in the first half of 2022, at the discretion of those firms.

Phase III Clinical Trial

In order to ultimately obtain full single agent regulatory approval, the Company expects that at least one Phase III clinical trial will be required, most likely in patients similar to the population of mCRPC patients who will have been enrolled in the planned Phase I/II clinical trial. However, the results of the Phase I/II clinical trial may also suggest modification of the initial patient population based on anti-tumor response and biomarker assessment. In a Phase III clinical trial, the key end-point is expected to be progression-free survival or overall survival relative to patients receiving the standard-of-care. It is expected that such a Phase III clinical trial would be conducted at numerous sites around the world.

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Competition

The competition in the prostate cancer market is very high, and many of the companies against which we compete or against which we may compete in the future have significantly greater financial resources and expertise in research and development, manufacturing, preclinical testing, conducting clinical trials, obtaining regulatory approvals and marketing approved products than we do. Mergers and acquisitions in the pharmaceutical and biotechnology industries may result in even more resources being concentrated among a smaller number of our competitors. Several pharmaceutical therapies already have approved and many new molecules are being tested for their effect in this patient population. In addition, generic forms of Zytiga (abiraterone acetate) are now approved and commercially available in the U.S.

Currently approved therapies include:

GENERIC/PROGRAM NAME	BRAND NAME	COMPANY NAME(S)	STAGE
Enzalutamide	Xtandi	Astellas and Pfizer	Marketed
Abiraterone acetate	Zytiga	Johnson & Johnson	Marketed
Sipuleucel-T	Provenge	Valeant	Marketed
Docetaxel	n/a	Sanofi and various	Marketed
Cabazitaxel	Jevtana	Sanofi	Marketed
Radium-233	Xofigo	Bayer	Marketed
Apalutamide (ARN-509)	Erleada	Johnson & Johnson	Marketed
Darolutamide	Nubeqa	Bayer	Marketed
Pembrolizumab	Keytruda	Merck	Marketed
Olaparib	Lynparza	AstraZeneca	Marketed
Rucaparib	Rubraca	Clovis Oncology	Marketed

In this market, ESSA believes that its competitive position is strong because its product candidate, if successful, involves a mechanistically unique, differentiated approach to prostate cancer involving the therapeutic modality that has been shown to make the biggest difference to the survival of recurrent prostate cancer patients: blocking AR activation. Since anitens have been shown to directly bind to AR-NTD and prevent AR-mediated transcription, they have the potential to bypass the AR-dependent resistance pathways (discussed above) that may develop as a result of treatment with current hormone-related therapies that target the AR LBD. If successful, ESSA believes this could represent a significant step forward in the treatment of prostate cancer. To ESSA’s knowledge, no other antagonist to the AR-NTD is currently undergoing clinical trials for prostate cancer or any other indication. Other approaches to interfering with AR signaling include strategies to degrade the AR such as that being pursued by Arvinas, Inc.

Patents and Proprietary Rights

License Agreement with UBC and the BCCA

ESSA has in-licensed intellectual property embodied in issued patents, pending patents applications and know-how relating to compounds that modulate AR activity. ESSA refers to these intellectual property rights as the “Licensed IP.”

Pursuant to the License Agreement, ESSA has been granted a worldwide, exclusive license to develop and commercialize products based on the Licensed IP. ESSA paid a minimum annual royalty of C$40,000 in the 2014 calendar year, increasing to C$65,000 in each of 2015 and 2016 and C$85,000 in 2017, 2018, and 2019 and must continue to pay a minimum of C$85,000 for each year thereafter. For a First Compound entering clinical development, an additional C$50,000 and C$900,000 must be paid upon enrollment of a patient in a Phase II and Phase III clinical trial, respectively.

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The Licensors may terminate the License Agreement upon ESSA’s insolvency, or the License Agreement may be terminated by either party for certain material breaches by the other party. ESSA has already spent more than C$5,000,000 in connection with the commercialization of products relating directly to the Licensed IP, as required under the License Agreement. ESSA is required to allocate reasonable time to the development and commercialization of the Licensed IP and to use reasonable efforts to promote, market and sell products covered by the Licensed IP. The terms of the License Agreement required ESSA to issue to the Licensors, 1,000,034 pre-Consolidation common shares, in lieu of payment of an initial license fee. If ESSA develops products covered by the Licensed IP in the future, it will be required to pay certain development and regulatory milestone payments up to an aggregate of C$2.4 million for the first drug product developed under the license and up to an aggregate of C$510,000 for each subsequent product. ESSA must also pay the Licensors low single-digit royalties based on aggregate worldwide net sales of products covered by the Licensed IP and a percentage of sublicensing revenue in the low teens. The License Agreement will expire on the later of 20 years after the date of the License Agreement or the expiry of the last issued patent included in the Licensed IP.

ESSA’s Intellectual Property Strategy

Both ESSA and the broader pharmaceutical industry attach significant importance to patents for the protection of new technologies, products and processes. Accordingly, ESSA’s success depends, in part, on its ability to obtain patents or rights thereto, to protect commercial secrets and carry on activities without infringing the rights of third parties. See “Risk Factors” in our Annual Report on Form 10-K. Where appropriate, and consistent with management’s objectives, ESSA will continue to seek patents in relation to components or concepts of its technology that it perceives to be important.

Patent Applications

ESSA has licensed certain patent rights, with respect to some of its compounds that modulate AR activity, from the Licensors, jointly. ESSA has the right to acquire ownership of the licensed patents and patent applications upon specified payment to the Licensors, and providing that payments required under the License Agreement continue to be made.

As of January 2022, ESSA owns rights to 47 issued patents worldwide, including 12 issued U.S. patents, that are in force and cover multiple EPI- and aniten structural classes of compounds with different structural motifs/analogues. As of January 2022, 4 of these issued patents cover the EPI-7386 compound, and are expected to provide protection between 2036 to 2039.

ESSA currently has 16 pending and maintained patent families which cover multiple EPI- and aniten structural classes of compounds with different structural motifs/analogues, that provide a strong and defensive intellectual property portfolio.

Regulatory Environment

The production and manufacture of ESSA’s product candidate and potential future product candidates and its R&D activities are subject to regulation for safety, efficacy, quality and ethics by various governmental authorities around the world. In the United States, drugs and biological products are subject to regulation by the FDA. In Canada, these activities are regulated by the Food and Drugs Act and the rules and regulations thereunder, which are enforced by the TPD. Drug approval laws require registration of manufacturing facilities, carefully controlled research and testing of product candidates, government review and approval of experimental results prior to giving approval to sell drug products. Regulators also require that rigorous and specific standards such as cGMP, good laboratory practices (“GLP”) and current good clinical practices (“GCP”) are followed in the manufacture, testing and clinical development respectively of any drug product. See “Risk Factors” in our Annual Report on Form 10-K.

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The process of obtaining regulatory approvals and the corresponding compliance with appropriate federal, state, local and foreign statutes and regulations requires the expenditure of substantial time and financial resources. Failure to comply with the applicable U.S. requirements at any time during the product development process, approval process or after approval may subject an applicant or sponsor to a variety of administrative or judicial sanctions, including refusal by the FDA to approve pending applications, withdrawal of an approval, imposition of a clinical hold, issuance of warning letters and other types of enforcement letters, product recalls, product seizures, total or partial suspension of production or distribution, injunctions, fines, refusals of government contracts, restitution, disgorgement of profits, or civil or criminal investigations and penalties brought by the FDA and the Department of Justice or other governmental entities.

Drug Products Development Process

An applicant seeking approval to market and distribute a new drug product in the United States must typically undertake the following:

● completion of extensive nonclinical, sometimes referred to as preclinical laboratory tests, and preclinical animal trials in compliance with applicable requirements for the humane use of laboratory animals and formulation studies, including GLPs;