MEI Pharma (MEIP) 10-K 2019 FY Annual report

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM10-K

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

For the fiscal year ended June 30, 2019

OR

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

For the transition period from                    to                    .

Commission File Number:000-50484

MEI Pharma, Inc.

(Exact name of registrant as specified in its charter)

DELAWARE	51-0407811
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

3611 Valley Centre Drive, San Diego, CA 92130

(Address of principal executive offices) (Zip Code)

(858)369-7100

(Registrant’s telephone number, including area code)

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

Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock, $0.00000002 par value	MEIP	The NASDAQ Stock Market LLC

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

None

(Title of Class)

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

Indicate by a check mark if the registrant is not required to file reports pursuant to Section 13 or Section 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 RegulationS-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, anon-accelerated filer, a smaller reporting company, or an emerging growth company. See definition of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule12b-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 checkmark 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 Rule12b-2 of the Exchange Act).    Yes  ☐    No  ☒

The aggregate market value of the voting common equity held bynon-affiliates of the registrant was approximately $186.6 million as of December 31, 2018, based on the closing price of the registrant’s Common Stock as reported on the NASDAQ Capital Market on such date. For purposes of this calculation, shares of the registrant’s common stock held by directors and executive officers have been excluded. This number is provided only for purposes of this Annual Report onForm 10-K and does not represent an admission that any particular person or entity is an affiliate of the registrant.

As of August 26, 2019, there were 73,634,927 shares of the registrant’s common stock, par value $0.00000002 per share, outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Certain information required by Part III of this Annual Report onForm 10-K is incorporated by reference from the registrant’s definitive proxy statement for the annual meeting of stockholders to be held in December 2019, which will be filed with the Securities and Exchange Commission within 120 days after the close of the registrant’s fiscal year ended June 30, 2019.

MEI PHARMA, INC.

TABLE OF CONTENTS

		Page
PART I
Item 1:	Business		3
Item 1A:	Risk Factors		13
Item 1B:	Unresolved Staff Comments		24
Item 2:	Properties		24
Item 3:	Legal Proceedings		25
Item 4:	Mine Safety Disclosures		25
PART II
Item 5:	Market for the Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities		26
Item 6:	Selected Financial Data		27
Item 7:	Management’s Discussion and Analysis of Financial Condition and Results of Operations		28
Item 7a:	Quantitative and Qualitative Disclosures about Market Risk		34
Item 8:	Financial Statements and Supplementary Data		34
Item 9:	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure		53
Item 9A:	Controls and Procedures		53
Item 9B:	Other Information		54
PART III
Item 10:	Directors, Executive Officers and Corporate Governance		55
Item 11:	Executive Compensation		55
Item 12:	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters		55
Item 13:	Certain Relationships and Related Transactions, and Director Independence		55
Item 14:	Principal Accountant Fees and Services		55
PART IV
Item 15:	Exhibits, Financial Statement Schedules		56
Item 16:	Form10-K Summary		57

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Forward-Looking Statements

This Annual Report on Form10-K, or Annual Report, includes forward-looking statements, which involve a number of risks and uncertainties. These forward-looking statements can generally be identified as such because the context of the statement will include words such as “may,” “will,” “intend,” “plan,” “believe,” “anticipate,” “expect,” “estimate,” “predict,” “potential,” “continue,” “likely,” or “opportunity,” the negative of these words or other similar words. Similarly, statements that describe our future plans, strategies, intentions, expectations, objectives, goals or prospects and other statements that are not historical facts are also forward-looking statements. Discussions containing these forward-looking statements may be found, among other places, in “Business” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in this Annual Report. For such statements, we claim the protection of the Private Securities Litigation Reform Act of 1995. Readers of this Annual Report are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the time this Annual Report was filed with the Securities and Exchange Commission, or SEC. These forward-looking statements are based largely on our expectations and projections about future events and future trends affecting our business, and are subject to risks and uncertainties that could cause actual results to differ materially from those anticipated in the forward-looking statements. These risks and uncertainties include, without limitation, those discussed in “Risk Factors” and in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of this Annual Report. In addition, past financial or operating performance is not necessarily a reliable indicator of future performance, and you should not use our historical performance to anticipate results or future period trends. We can give no assurances that any of the events anticipated by the forward-looking statements will occur or, if any of them do, what impact they will have on our results of operations and financial condition. Except as required by law, we undertake no obligation to update publicly or revise our forward-looking statements to reflect events or circumstances that arise after the filing of this Annual Report or documents incorporated by reference herein that include forward-looking statements.

Unless the context requires otherwise, references in this Annual Report to “MEI Pharma,” “we,” “us” and “our” refer to MEI Pharma, Inc.

MEI Pharma, Inc. and our corporate logo are registered service marks of MEI Pharma. Any other brand names or trademarks appearing in this Annual Report are the property of their respective holders.

PART I

Item 1. Business

Overview

We are a late-stage pharmaceutical company focused on leveraging our extensive development and oncology expertise to identify and advance new therapies intended to meaningfully improve the treatment of cancer. Our approach to building our pipeline is to acquire oncology drug candidates and create value in programs through clinical development, commercialization and strategic partnerships.

Our portfolio of drug candidates contains four clinical-stage candidates, including one candidate in an ongoing Phase 3 global registration trial and another candidate in an ongoing Phase 2 clinical trial to support an accelerated approval of a marketing application with the U.S. Food and Drug Administration (“FDA”) under 21 CFR Part 314.500, Subpart H. Our common stock is listed on the NASDAQ Capital Market under the symbol “MEIP.”

Clinical Development Programs

Cancer is often a highly adaptable disease capable of evading the body’s defenses and resisting treatment, allowing it to grow and spread. Despite new treatments that strive to leverage actionable insights into cancer biology, even the most cutting-edge therapies can struggle to balance potency with safety. As a result, the oncology community strives to improve on existing therapies and search for new and better options to optimize benefits for patients. This approach includes medicines that not only act as monotherapies, but also work well in combination with other therapies to deliver the best possible outcomes.

We currently have four clinical-stage development programs with diverse approaches to inhibiting cancer, including epigenetics, cell signalling and cancer metabolism:

• ME-401, an oral phosphatidylinositol3-kinase (“PI3K”) delta inhibitor;

• Voruciclib, an oral cyclin-dependent kinase (“CDK”) inhibitor;

• ME-344, a mitochondrial inhibitor targeting the oxidative phosphorylation (“OXPHOS”) complex; and

• Pracinostat, an oral histone deacetylase (“HDAC”) inhibitor.

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* Phase 2 trial intended to support an accelerated approval marketing application with the FDA

** Study arm initiated under clinical collaboration with BeiGene, Ltd.

*** Investigator-initiated trial

ME-401: PI3Kd Inhibitor in a Phase 2 Trial to Support an Accelerated Approval in Relapsed or Refractory Follicular Lymphoma

ME-401 is an oral, once-daily, selective PI3Kd inhibitor in clinical development for the treatment ofB-cell malignancies. We own worldwide rights toME-401 in all geographies except Japan, which we licensed to Kyowa Kirin Company (formerly “Kyowa Hakko Kirin Co., Ltd.”) (“KKC”) in 2018.

MEI is conducting two ongoing studies evaluatingME-401. The first is a Phase 2 clinical trial evaluatingME-401 as a monotherapy for the treatment of adults with relapsed or refractory follicular lymphoma (“FL”) after failure of at least two prior systemic therapies including chemotherapy and an anti-CD20 antibody. Subject to the results, upon completion of the Phase 2 clinical trial, we are planning a submission with the FDA to support an accelerated approval of a marketing application under 21 CFR Part 314.500, Subpart H. The second is amulti-arm, open-label, Phase 1b dose escalation and expansion trial evaluatingME-401 as a monotherapy and in combination with other therapies or investigational agents in patients with relapsed or refractoryB-cell malignancies.

While PI3Kd inhibitors as a group are a clinically validated class for the treatment ofB-cell malignancies, the FDA approved orally administered products, idelalisib (marketed as Zydelig^®) and duvelisib (marketed as COPIKTRA®), and the intravenously administered PI3Kd/α inhibitor copanlisib (marketed as Aliqopa^®), are challenged by dose-limiting toxicities. We believe this provides an opportunity for the development of a next-generation candidate with pharmaceutical properties that may better maximize the biological potential of PI3Kd inhibition by limiting toxicities, which hinder clinical utility.

The molecular structure and pharmacodynamic characteristics ofME-401 are distinct from the FDA approved PI3Kd inhibitors.ME-401 is characterized by prolonged target binding, preferential cellular accumulation, high volume of distribution throughout the body tissues, and an approximately28-hour half-life suitable for once daily oral administration. These properties ofME-401 allow exploration of flexible dosing regimens such as an intermittent dosing schedule, which has the potential to maintain clinical benefit while minimizing immune-related toxicities common to other PI3Kd agents, either as a monotherapy or in combination with other therapies or investigational agents.

ME-401 Scientific Overview: at the Crossroads ofB-cell Signalling Pathways

The PI3K/AKT/mTOR pathway is an important signaling pathway for many cellular functions such as cell survival, cell cycle progression and cellular growth. PI3Ks are a family of enzymes within this pathway that have been shown to play a critical role in the proliferation and survival of certain cancer cells. Specifically, the PI3Kd isoform is at the crossroads ofB-cell receptor signaling pathways that are major drivers of survival and proliferation of manyB-cell malignancies. Because thed isoform is largely restricted to leukocytes, it is an attractive target for selectively inhibiting the PI3K pathway inB-cell malignancies.

PI3Kd Inhibitors andB-Cell Malignancies

Clinical Program

MEI is conducting two ongoing studies: a Phase 2 trial evaluating patients with relapsed or refractory FL to support an accelerated approval of a marketing application with the FDA under 21 CFR Part 314.500, Subpart H, and amulti-arm, open-label, Phase 1b dose escalation and expansion trial as a monotherapy and in combination with other therapies or investigational agents in patients with FL and otherB-cell malignancies.

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Phase 1bMulti-arm Trial

In June 2019, at the American Society of Clinical Oncology (“ASCO”) annual meeting and the International Conference on Malignant Lymphoma (“ICML”) meeting, we reported updated interim data from the ongoing Phase 1b clinical trial evaluatingME-401 as a monotherapy and in combination with rituximab in patients with relapsed or refractoryB-cell malignancies. Over 85 patients were enrolled at the time of the ASCO and ICML presentations, of which data on 71 patients were presented at the meetings for safety, including 54 patients with relapsed or refractory FL and 17 with relapsed or refractory chronic lymphocytic leukemia or small lymphocytic lymphoma (“CLL/SLL”). The immunoglobulin heavy-chain variable region was unmutated in 82% (9/11) of CLL/SLL patients tested.

ME-401 is administered once daily at 60 mg for two28-day cycles and then on an intermittent schedule of once daily dosing for the first seven days of each subsequent28-day cycle (i.e. IS). A previous cohort of monotherapy patients in the trial was treated withME-401 at 60 to 180 mg administered continuously once daily or were switched to the IS in later cycles (i.e. CS).

The overall response rate among the 64 patients with relapsed or refractory FL and relapsed or refractory CLL/SLL who were evaluable for efficacy was 83% (54/64); the overall response rate in patients with relapsed or refractory FL was 80% (40/50) and it was 100% in patients with CLL/SLL (14/14). The overall response rate in patients ranged from 75% to 100% across all groups of patients with FL or CLL/SLL and the majority of patients responding, 89%, achieved their response by the end of the second treatment cycle.

Evaluable Patients	FL (N = 50)		CLL/SLL (N = 14)		Total (N = 64)
All groups		40/50 (80%)		14/14 (100%)		54/64 (83%)
By treatment arm
ME-401 monotherapy		30/38 (79%)		11/11 (100%)		41/49 (84%)
ME-401 + rituximab		10/12 (83%)		3/3 (100%)		13/15 (87%)
By schedule
IS Group		15/20 (75%)		5/5 (100%)		20/25 (80%)
CS Group		25/30 (83%)		9/9 (100%)		34/39 (87%)

After a median follow up of approximately nine months as of the 2019 ASCO and ICML presentations, the majority of patients remain progression free.

ME-401 was generally well-tolerated and no grade 4 or grade 5 adverse events of special interest have been observed in the Phase 1b trial. Among drug related grade 3 adverse events of special interest, the most common are diarrhea/colitis at 9.7% (3/31) on IS dosing and 20% (8/40) on CS dosing, and rash with none on IS dosing and 10% (4/40) on CS dosing, in FL and CLL/SLL patients.

The rate of the development of delayed, grade 3 adverse events of special interest was less in patients on the intermittent dosing schedule. Grade 3 elevations in ALT and AST were transient and in each case were associated with grade 3 diarrhea or rash.

Grade 3 Drug Related Adverse Events of Special Interest	CS (N = 40) n (%)	IS (N = 31) n (%)
Diarrhea/Colitis	8 (20.0%)	3 (9.7%)
Rash, all types	4 (10.0%)	0
ALT/AST increased	3 (7.5%)	1 (3.2%)
Mucositis	1 (2.5%)	0
Pneumonia/Pneumonitis	5 (12.5%)	1 (3.2%)

The Phase 1b trial is additionally evaluatingME-401 (60 mg) in combination with zanubrutinib, an investigational inhibitor of Bruton’s tyrosine kinase (“BTK”) being developed by BeiGene, Ltd. (“Beigene”). Pursuant to a collaboration initiated with BeiGene in October 2018, we began evaluating the safety and efficacy ofME-401 in combination with zanubrutinib for the treatment of patients with variousB-cell malignancies. The cost of the combination trial is being equally shared. Each company is supplying its own investigational agent. We retain all commercial rights toME-401 and BeiGene retains all commercial rights to zanubrutinib.

Phase 2 Trial Intended to Support an Accelerated Approval Marketing Application

In July 2018, the Company discussed with the FDA anME-401 monotherapy accelerated approval strategy in patients with relapsed or refractory FL. The FDA communicated support for the Company’s proposed randomized Phase 2 trial. An accelerated approval ofME-401 will be subject to FDA review of the improvement provided byME-401 over other therapies available.

We are recruiting patients in the global randomized Phase 2 trial evaluating the efficacy, safety, and tolerability ofME-401 in patients with FL after failure of at least two prior systemic therapies including chemotherapy and an anti-CD20 antibody. The study will evaluate both the CS and IS dosing regimens; in one arm,ME-401 will be administered once daily continuously and in the other arm,ME-401 will be administered once daily for two cycles (i.e., eight weeks) followed by an intermittent schedule wherebyME-401 will be administered once daily for the first seven days of a28-day cycle followed by 21 days of placebo. Approximately 166 patients will be randomized in the trial and the primary efficacy endpoint will be the rate of objective response to therapy and tolerability ofME-401.

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Voruciclib: CDK Inhibitor with CDK9 Inhibition in Phase 1 Studies

Voruciclib is an orally administered CDK inhibitor differentiated by its potent in vitro inhibition of CDK9 in addition to CDK6, 4 and 1. Voruciclib is currently being evaluated in a Phase 1b dose ranging trial in patients withB-cell malignancies.

Voruciclib Scientific Overview: Cell Cycle Signaling

The CDK family of proteins are important cell cycle regulators. CDK9 is a transcriptional regulator of the myeloid leukemia cell differentiation protein (“MCL1”), a member of the family of anti-apoptotic proteins which, when elevated, may prevent the cell from undergoing cell death. Inhibition of CDK9 blocks the production of MCL1, which is an established resistance mechanism to theB-cell lymphoma (“BCL2”) inhibitor venetoclax (marketed as Venclexta®).

Inpre-clinical studies voruciclib shows dose-dependent suppression of MCL1; in December 2017 a study of voruciclib published in the journalNature Scientific Reports reported that the combination of voruciclib plus theBCL-2 inhibitor venetoclax was capable of inhibiting two master regulators of cell survival,MCL-1 andBCL-2, and achieved synergistic antitumor efficacy in an aggressive subset of DLBCLpre-clinical models. (Scientific Reports. (2017) 7:18007.DOI:10.1038/s41598-017-18368-w).

Additionally, at the 2018 American Society of Hematology (“ASH”) annual meeting we presented results from pre-clinical studies demonstrating that voruciclib synergizes with venetoclax to induce apoptosis in both venetoclax sensitive and resistant acute myeloid leukemia (“AML”) cells. The pre-clinical data further demonstrated that voruciclib transiently downregulates MCL1 and that MCL1 downregulation is likely responsible for the bulk of the synergy between voruciclib and venetoclax.

CDK9 is also a transcriptional regulator of MYC, a transcription factor regulating cell proliferation and growth which contributes to many human cancers and is frequently associated with poor prognosis and unfavorable patient survival. Targeting MYC directly has historically been difficult, but CDK9 is a transcriptional regulator of MYC and is a promising approach to target this oncogene.

Clinical Program

We are evaluating patients with hematological malignancies in a dose ranging Phase 1b clinical trial of voruciclib. The trial is initially intended to evaluate voruciclib as a monotherapy in patients with relapsed and/or refractoryB-cell malignancies or AML after failure of prior standard therapies to determine the safety, preliminary efficacy and maximum tolerated dose. In parallel, subject to FDA agreement, we also plan to evaluate voruciclib in combination with venetoclax to assess synergies and the opportunity for combination treatments across multiple indications.

Voruciclib was previously evaluated in more than 70 patients in multiple Phase 1 studies with a tolerability profile consistent with other drugs in its class. Inpre-clinical studies, voruciclib shows dose-dependent suppression of MCL1 at concentrations achievable with doses that appear to be generally well tolerated in earlier Phase 1 studies.Pre-clinical studies additionally show inhibition of MYC protein expression.

ME-344: Mitochondrial Inhibitor with Combinatorial Potential

ME-344 is our novel and tumor selective, isoflavone-derived mitochondrial inhibitor drug candidate. It directly targets the OXPHOS complex 1, a pathway involved in ATP production in the mitochondria.ME-344 was recently studied in an investigator-initiated, multi-center, randomized clinical trial in combination with the vascular endothelial growth factor (“VEGF”) inhibitor bevacizumab (marketed as Avastin^®) in a total of 42 patients with HER2 negative breast cancer.

ME-344 Scientific Overview: Cancer Metabolism

Tumor cells often display a high metabolic rate to support cell division and growth. This heightened metabolism requires a continual supply of energy in the form of adenosine triphosphate (“ATP”). The two major sources of ATP are the specialized cellular organelles termed mitochondria and through the metabolism of carbohydrates, proteins and lipids.

ME-344 was identified through a screen of more than 400 new chemical structures originally created based on the central design of naturally occurring plant isoflavones. We believe that some of these synthetic compounds, including our drug candidateME-344, interact with specific mitochondrial enzyme targets, resulting in the inhibition of ATP generation. When these compounds interact with their target, a rapid reduction in ATP occurs, which leads to a cascade of biochemical events within the cell and ultimately to cell death.

Clinical Program

ME-344 demonstrated evidence of single agent activity against refractory solid tumors in a Phase 1 trial, and inpre-clinical studies tumor cells treated withME-344 resulted in a rapid loss of ATP and cancer cell death. In addition to single agent activity,ME-344 may also have significant potential in combination with anti-angiogenic therapeutics. While anti-angiogenics reduce the rate of glycolysis in tumors as a mechanism to block growth, tumor metabolism often shifts to mitochondrial metabolism to continue energy production to support continued tumor proliferation. In such cases of tumor plasticity in the presence of treatment with anti-angiogenics, targeting the alternative metabolic source withME-344 may open an important therapeutic opportunity.

Support for this combinatorial use ofME-344 was first published in the June 2016 edition ofCell Reports;pre-clinical data from a collaboration with the Spanish National Cancer Research Centre in Madrid demonstrated mitochondria-specific effects ofME-344 in cancer cells, including substantially enhanced anti-tumor activity when combined with agents that inhibit the activity of VEGF. These data demonstrating the potential anti-cancer effects of combiningME-344 with a VEGF inhibitor due to an inhibition of both mitochondrial and glycolytic metabolism provided a basis for commencement of an investigator-initiated trial ofME-344 in combination with bevacizumab in HER2 negative breast cancer patients.

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At ASCO, further support for the combinatorial use ofME-344 with anti-angiogenic therapeutics was presented from a multicenter, investigator-initiated, randomized, open-label, clinical trial that evaluated the combination ofME-344 and bevacizumab in 42 patients with early HER2-negative breast cancer. Patients were randomizedone-to-one to eitherME-344 in combination with bevacizumab or saline in combination with bevacizumab.

The primary objective of the trial was to show proof ofME-344 biologic activity as measured by Ki67 reductions (a measure of cell proliferation that is highly correlated with tumor response) from day 0 to 28 compared to the control group who received bevacizumab alone. Secondary objectives included determining whetherME-344 biologic activity correlates with vascular normalization. The data demonstrate significant biologic activity in theME-344 treatment group:

• InME-344 treated patients, mean absolute Ki67 decreases were 13.3 compared to an increase of 1.1 in the bevacizumab monotherapy group (P=0.01).

• InME-344 treated patients, mean relative Ki67 decreases were 23% compared to an increase of 186% in the bevacizumab monotherapy group (P < 0.01).

• The mean relative Ki67 reduction in patients experiencing vascular normalization in theME-344 treated patients was 33%, compared to an increase of 11.8% in normalized patients from the bevacizumab monotherapy group (P=0.09). Approximatelyone-third of patients in each arm had vascular normalization.

Treatment was generally well tolerated; two Grade 3 adverse events of high blood pressure were reported, one in each arm.

Results from our earlier,first-in-human, single-agent Phase 1 clinical trial ofME-344 in patients with refractory solid tumors were published in the April 1, 2015 issue of Cancer. The results indicated that eight of 21 evaluable patients (38%) treated withME-344 achieved stable disease or better, including five who experienced progression-free survival that was at least twice the duration of their last prior treatment before entry into the trial. In addition, one of these patients, a heavilypre-treated patient with small cell lung cancer, achieved a confirmed partial response and remained on study for two years.ME-344 was generally well tolerated at doses equal to or less than 10 mg/kg delivered on a weekly schedule for extended durations. Treatment-related adverse events included nausea, dizziness and fatigue. Dose-limiting toxicities were observed at both the 15 mg/kg and 20 mg/kg dose levels, consisting primarily of grade three peripheral neuropathy.

Pracinostat: HDAC Inhibitor Candidate in a Phase 3 Global Registration Clinical Trial

Pracinostat is an oral HDAC inhibitor being evaluated in a pivotal Phase 3 global registration clinical trial for the treatment of adults with newly diagnosed AML who are unfit to receive intensive chemotherapy. Pracinostat is also being evaluated in a Phase 2 trial in patients with high or very high-risk myelodysplastic syndrome (“MDS”). In August 2016, we entered into an exclusive worldwide license, development, manufacturing and commercialization agreement with Helsinn Healthcare SA, a Swiss pharmaceutical corporation (“Helsinn”) for pracinostat in AML, MDS and other potential indications (the “Helsinn License Agreement”). Under the agreement, Helsinn is primarily responsible for funding global development and commercialization costs for pracinostat. We are responsible for conducting the Phase 2 MDS trial, the cost of which is being shared equally with Helsinn.

Breakthrough Therapy Designation for pracinostat was granted by the FDA in 2016, and in January 2018 the EMA granted Orphan Drug Designation to pracinostat for the treatment of AML. The designations in the US and European Union (“EU”) are supported by data from a Phase 2 trial of pracinostat plus azacitidine (marketed as Vidaza^®) in elderly patients with newly diagnosed AML who are not candidates for induction chemotherapy. The trial showed a median overall survival of 19.1 months and a complete remission (“CR”) rate of 42% (21 of 50 patients). These data compare favorably to an international Phase 3 trial of azacitidine(AZA-001; Dombret et al. Blood. 2015 May 18), which showed a median overall survival of 10.4 months with azacitidine alone and a CR rate of 19.5% in a similar patient population. The combination of pracinostat and azacitidine was generally well tolerated, with no unexpected toxicities. The most common grade 3/4 treatment-emergent adverse events included febrile neutropenia, thrombocytopenia, anemia and fatigue.

Pracinostat Scientific Overview; Epigenetics

HDACs play a key role in epigenetic regulation of gene expression by regulating chromatin structure. Acetylation of positively charged lysine residues present in histone proteins by the histone acetyltransferase (“HATs”) reduces the affinity between histones and negatively charged DNA, resulting in the opening of the chromatin structure. This makes it easier for the transcriptional machinery to access the DNA, enhancing RNA transcription. Conversely, deacetylation by the HDACs closes the chromatin structure leading to a repression of gene transcription. In normal cells, HDACs and HATs together control histone acetylation levels to maintain a balance. In diseases such as cancer, this regulation can be disturbed. HDAC inhibitors cause accumulation of acetylated histones, enhance transcription and result in changes to a variety of cellular responses including differentiation, proliferation, migration, survival and response to metabolic and hypoxic stress. In general, tumor cells are more susceptible than normal cells to the anti-proliferative andpro-apoptotic effects of HDAC inhibitors.

There are currently three HDAC inhibitors, one oral and two injectable, approved by the FDA for the treatment ofT-cell lymphoma and a fourth orally administered HDAC inhibitor approved for multiple myeloma. Other HDAC inhibitors are being evaluated in clinical trials as monotherapies and in combination for the treatment of various hematologic diseases and solid tumors.

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Pracinostat is an orally available, potent HDAC inhibitor with potentially improved physicochemical, pharmaceutical and pharmacokinetic properties when compared to other compounds of this class, including increased bioavailability and increased half-life.

Clinical Program

The ongoing pivotal Phase 3 registration trial, which is being run by Helsinn and was initiated in June 2017, is a randomized, double-blind, placebo-controlled study that will enroll worldwide approximately 500 adults with newly diagnosed AML who are unfit to receive intensive chemotherapy. Patients are randomized 1:1 to receive pracinostat or placebo with azacitidine as background therapy. The primary endpoint of the trial is overall survival. Secondary endpoints include morphologic CR rate, event-free survival and duration of CR.

Additionally, pracinostat is being investigated in a Phase 2 dose optimization trial evaluating patients with high and very high-risk MDS who are previously untreated with hypomethylating agents. This patient group represents the highest unmet need in MDS, with median survival estimates of 1.6 years and 0.8 years, respectively (Greenberg et al, Blood 2012). The ongoing Phase 2 open-label trial is evaluating a 45 mg dose of pracinostat in combination with the standard dose of azacitidine. The trial is designed to evaluate tolerability of the combination, with the intent of maintaining patient enrollment longer than in an earlier Phase 2 trial evaluating a 60 mg dose. A prolonged treatment may result in a systemic exposure to pracinostat and azacitidine sufficient to achieve the desired treatment effect; data from the earlier Phase 2 trial suggested that insufficient exposure to treatment may have limited the treatment effect of the combination.

Apre-planned interim analysis of the ongoing Phase 2 MDS trial demonstrated a 10% discontinuation rate among the first 20 evaluable patients treated, meeting the predefined threshold in the first 3 treatment cycles. The 10% rate is consistent with the discontinuation rate for azacitidine given as a monotherapy in earlier studies with pracinostat. Having met this threshold, the trial expanded open-label enrollment to a total of 60 patients in the study. An interim analysis presented at the 2018 ASH meeting demonstrated a discontinuation rate due to adverse events in the first 3 months of 4%, substantially lower than the rate of 26% reported in the Company’s prior Phase 2 trial. The Phase 2 trial has completed enrollment and patients will be followed for one year to evaluate safety and efficacy. The primary endpoints of the trial are 1) safety and tolerability and 2) overall response rate, defined as CR, partial remission (“PR”) and marrow CR. Secondary endpoints include CR rate, overall hematologic improvement (“HI”) response rate, clinical benefit rate (defined as rate of CR + PR + HI + Marrow CR), rate of cytogenetic complete response/remission, duration of response, rate of leukemic transformation, event-free survival, progression-free survival and overall survival. If the Phase 2 open-label trial is successful, Helsinn intends to initiate a global registration trial. All future development and commercialization costs after the completion of the Phase 2 trial are the responsibility of Helsinn.

Pracinostat has been previously investigated in more than 300 patients in multiple Phase 1 and Phase 2 clinical trials and found to be generally well tolerated with manageable side effects often associated with drugs of this class, including fatigue, myelosuppression and gastrointestinal toxicity.

Competition

The marketplace for our drug candidates is highly competitive. A number of other companies have products or drug candidates in various stages ofpre-clinical or clinical development that are intended for the same therapeutic indications for which our drug candidates are being developed. Some of these potential competing drug candidates are further advanced in development than our drug candidates and may be commercialized sooner. Even if we are successful in developing products that receive regulatory approval, such products may not compete successfully with products produced by our competitors or with products that may subsequently receive regulatory approval.

Our competitors include pharmaceutical companies and biotechnology companies, as well as universities and public and private research institutions. In addition, companies active in different but related fields represent substantial competition for us. Many of our competitors developing oncology drugs have significantly greater capital resources, larger research and development staffs and facilities, and greater experience in drug development, regulation, manufacturing, marketing and commercialization than we do. They compete with us in recruiting sites and eligible patients to participate in clinical studies and in attracting development and/or commercialization partners. They also license technologies that are competitive with our technologies. As a result, our competitors may be able to more easily develop technologies and products that would render our technologies or our drug candidates obsolete ornon-competitive.

Intellectual Property

We own, by assignment or exclusive license, worldwide rights to each of our current drug candidates. Our intellectual property portfolio includes approximately 21 issued U.S. patents, 164 issued foreign patents, 16 pending U.S. patent applications, and 68 pending foreign applications.

We have acquired, by assignment, worldwide rights toME-401 and other related compounds from Pathway Therapeutics, Inc. The U.S. Patent and Trademark Office (“USPTO”) has issued four patents covering the composition of matter and pharmaceutical compositions of ME-401 which are projected to expire in January 2031 and December 2032, not including any patent term extension. There are currently nine U.S. and 23 foreign applications forME-401 and related compounds pending.

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We have acquired exclusive worldwide rights to develop, manufacture and commercialize voruciclib from Presage Biosciences, Inc. (“Presage”). The USPTO has issued three patents covering the composition of matter and pharmaceutical compositions of voruciclib which are projected to expire between April 29, 2024 and September 2028, not including any patent term extension.

We have acquired, by assignment, patents and patent applications from Novogen, our former majority shareholder, which relate to a large family of isoflavonoid compounds, includingME-344. The USPTO has issued ten patents coveringME-344, including its composition of matter, pharmaceutical compositions and methods of use to treat cancer. The composition of matter and pharmaceutical composition claims coveringME-344 are expected to expire in March 2027 and November 2031, not including patent term extension.

We have acquired, by assignment, patents and patent applications from S*Bio Pte Ltd (“S*Bio”) relating to a family of heterocyclic compounds, which include pracinostat, that inhibit histone deacetylases. The USPTO has issued seven patents covering a number of these heterocyclic-based compounds, including pracinostat, and their composition of matter, pharmaceutical compositions, and methods of use to treat proliferative diseases. The composition of matter claims covering pracinostat are projected to expire in May 2028, not including patent term extension. In the Helsinn License Agreement, we granted to Helsinn an exclusive (subject to certain retained rights to perform obligations under the agreement), sublicensable, payment-bearing, license under and to certain patents andknow-how controlled by us to develop, manufacture and commercialize pracinostat and any pharmaceutical product containing pracinostat for all human and animal indications.

Our success depends in large part on our ability to protect our proprietary technologies, compounds and information, and to operate without infringing the proprietary rights of third parties. We rely on a combination of patent, trade secret, copyright, and trademark laws, as well as confidentiality, licensing and other agreements, to establish and protect our proprietary rights. We seek patent protection for our key inventions, including drug candidates we identify, routes for chemical synthesis and pharmaceutical formulations. There is no assurance that any of our pending patent applications will issue, or that any of our patents will be enforceable or will cover a drug or other commercially significant product or method. In addition, we regularly review our patent portfolio to identify patents and patent applications that we deem to have relatively low value to our ongoing business operations for potential abandonment. There is also no assurance that we will correctly identify which of our patents and patent applications should be maintained and which should be abandoned. The term of most of our other current patents commenced, and most of our future patents, if any, will commence, on the date of issuance and terminate 20 years from the earliest effective filing date of the patent application. Because any marketing and regulatory approval for a drug often occurs several years after the related patent application is filed, the resulting market exclusivity afforded by any patent on our drug candidates and technologies will likely be substantially less than 20 years.

As most patent applications in the U.S. are maintained as confidential until published by the USPTO at 18 months from filing for all cases filed after November 29, 2000, or at issue, for cases filed prior to November 29, 2000, we cannot be certain that we or Presage were the first to make the inventions covered by the patents and applications referred to above. Additionally, publication of discoveries in the scientific or patent literature often lags behind the actual discoveries. Moreover, pursuant to the terms of the Uruguay Round Agreements Act, patents filed on or after June 8, 1995 have a term of twenty years from the date of such filing except for provisional applications, irrespective of the period of time it may take for such patent to ultimately issue. This may shorten the period of patent protection afforded to therapeutic uses ofME-401, voruciclib,ME-344 or pracinostat as patent applications in the biopharmaceutical sector often take considerable time to issue. However, in some countries the patent term may be extended.

In order to protect the confidentiality of our technology, including trade secrets andknow-how and other proprietary technical and business information, we require all of our consultants, advisors and collaborators to enter into agreements that prohibit the use or disclosure of information that is deemed confidential. These agreements also oblige our consultants, advisors and collaborators to assign to us, or negotiate a license to developments, discoveries and inventions made by such persons in connection with their work relating to our products. We cannot be sure that confidentiality will be maintained by those from whom we have acquired technology or disclosure prevented by these agreements. We also cannot be sure that our proprietary information or intellectual property will be protected by these agreements or that others will not independently develop substantially equivalent proprietary information or intellectual property.

The pharmaceutical industry is highly competitive, and patents may have been applied for by, and issued to, other parties relating to products competitive withME-401, voruciclib,ME-344 or pracinostat. Use of these compounds and any other drug candidates may give rise to claims that they infringe the patents or proprietary rights of other parties, existing now and in the future. An adverse claim could subject us to significant liabilities to such other parties and/or require disputed rights to be licensed from such other parties. We cannot be sure that any license required under any such patents or proprietary rights would be made available on terms acceptable to us, if at all. If we do not obtain such licenses, we may encounter delays in product market introductions, or may find that the development, manufacture or sale of products requiring such licenses may be precluded.

Research and Development

The objective of our research and development program is the generation of data sufficient to achieve regulatory approval of our drug candidates in one or more dosage forms in major markets such as the U.S., to meet medical needs and develop a clinical and commercial profile with attractive attributes, and/or to allow us to enter into a development and/or commercial relationship with another party. The data are generated by ourpre-clinical studies and clinical trial programs.

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The key aspects of our research and development program are to provide more complete characterization of the following:

• the relevant molecular targets of action of our drug candidates;

• the relative therapeutic benefits and indications for use of our drug candidates as a monotherapy or as part of combinational therapy with other agents; and

• the most appropriate therapeutic indications and dosage forms forME-401, voruciclib,ME-344 and pracinostat.

Government Regulation

U.S. Regulatory Requirements

The FDA, and comparable regulatory agencies in other countries, regulate and impose substantial requirements upon the research, development,pre-clinical and clinical testing, labeling, manufacture, quality control, storage, approval, advertising, promotion, marketing, distribution and export of pharmaceutical products including biologics, as well as significant reporting and record-keeping obligations. State governments may also impose obligations in these and other areas.

In the U.S., pharmaceutical products are regulated by the FDA under the Federal Food, Drug, and Cosmetic Act (“FDCA”) and other laws, including in the case of biologics, the Public Health Service Act. We believe, but cannot be certain, that our products will be regulated as drugs by the FDA. The process required by the FDA before drugs may be marketed in the U.S. generally involves the following:

• pre-clinical laboratory evaluations, including formulation and stability testing, and animal tests performed under the FDA’s Good Laboratory Practices regulations to assess pharmacological activity and toxicity potential;

• submission and approval of an Investigational New Drug (“IND”), including results ofpre-clinical tests, manufacturing information, and protocols for clinical tests, which must become effective before clinical trials may begin in the U.S.;

• obtaining approval of Institutional Review Boards (“IRB”), to administer the products to human subjects in clinical trials;

• adequate and well-controlled human clinical trials to establish the safety and efficacy of the product for the product’s intended use;

• development of manufacturing processes which conform to FDA current Good Manufacturing Practices (“cGMP”), as confirmed by FDA inspection;

• submission of results forpre-clinical and clinical studies, and chemistry, manufacture and control information on the product to the FDA in a New Drug Approval Application (“NDA”); and

• FDAreview and approval of a NDA, prior to any commercial sale or shipment of a product.

The testing and approval process requires substantial time, effort, and financial resources, and we cannot be certain that any approval will be granted on a timely basis, if at all.

The results of thepre-clinical studies, together with initial specified manufacturing information, the proposed clinical trial protocol, and information about the participating investigators are submitted to the FDAas part of an IND, which must become effective before we may begin human clinical trials in the U.S. Clinical trials must be conducted in accordance with federal regulations and Good Clinical Practice (“GCP”) requirements, and with investigational products that follow cGMP. Additionally, an independent IRB must review and approve each study protocol and oversee conduct of the trial. An IND becomes effective 30 days after receipt by the FDA, unless the FDA, within the30-day period, raises concerns or questions about the conduct of the trials as outlined in the IND and imposes a clinical hold. If the FDA imposes a clinical hold, the IND sponsor must resolve the FDA’s concerns before clinical trials can begin.Pre-clinical tests and studies can take several years to complete, and there is no guarantee that an IND we submit based on such tests and studies will become effective within any specific time period, ifat all.

Human clinical trials are typically conducted in three sequential phases that may overlap.

• Phase 1:The drug is initially introduced into healthy human subjects or patients and tested for safety and dosage tolerance. Absorption, metabolism, distribution, and excretion testing is generally performed at this stage.

• Phase 2:The drug is studied in controlled, exploratory therapeutic trials in a limited number of subjects with the disease or medical condition for which the new drug is intended to be used in order to identify possible adverse effects and safety risks, to determine the preliminary or potential efficacy of the product for specific targeted diseases or medical conditions, and to determine dosage tolerance and the optimal effective dose.

• Phase 3:When Phase 2 studies demonstrate that a specific dosage range of the drug may be effective and the drug has an acceptable safety profile for further investigation, controlled, large-scale therapeutic Phase 3 trials are undertaken at multiple study sites to demonstrate clinical efficacy and to further test for safety in an expanded patient population.

Concurrent with clinical trials, companies usually complete additional non-clinical studies and must also develop additional information about the chemistry and physical characteristics of the product candidate.

We cannot be certain that we will successfully complete clinical testing of our products within any specific time period, ifat all. Furthermore, the FDA, the IRB or we may suspend or terminate clinical trials at any time on various grounds, including a finding that the subjects or patients are being exposed to an unacceptable health risk.

Results ofpre-clinical studies and clinical trials, as well as detailed information about the manufacturing process, quality control methods, and product composition, among other things, are submitted to the FDA as part of an NDA seeking approval to market and commercially distribute the product on the basis of a determination that the product is safe and effective for its intended use. Before approving an NDA, the FDA will inspect the facilities at which the product is manufactured and may inspect clinical study sites at which the product candidate was studied and will not approve the product unless cGMP and GCP compliance is satisfactory. If applicable regulatory criteria are not satisfied, the FDA may deny the NDA or require

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additional testing or information. As a condition of approval, the FDA also may require post-marketing testing or surveillance to monitor the product’s safety or efficacy. The FDA also may require a risk evaluation and mitigation strategy, or REMS, as a condition of product approval or following approval to ensure that the benefits of the product candidate outweigh the risks. Moreover, even if the FDA approves a product, it may limit the approved indications or populations for use of the product, require that contraindications, warnings, or precautions be included in the product labeling, including a black box warning, impose other conditions, such as post-approval studies, or may not approve label statements that are necessary for successful commercialization and marketing. Even after an NDA is approved, the FDA may impose additional obligations or restrictions (such as labeling changes, or clinical post-marketing requirements), or even suspend or withdraw a product approval on the basis of data that arise after the product reaches the market, or if compliance with regulatory standards is not maintained. We cannot be certain that any NDA we submit will be approved by the FDA for full or accelerated approval on a timely basis, if at all. Also, any such approval may limit the indicated uses for which the product may be marketed. Any refusal to approve, delay in approval, suspension or withdrawal of approval, or restrictions on indicated uses could have a material adverse impact on our business prospects.

Each NDA must be accompanied by a substantial user fee, pursuant to the requirements of the Prescription Drug User Fee Act (“PDUFA”), and its amendments. Following product approval, drug products are also subject to annual program fees. The FDA adjusts the PDUFA user fees on an annual basis. A written request can be submitted for a waiver for the application fee for the first human drug application that is filed by a small business, but there are no small business waivers for program fees. Product candidates that are designated as orphan products are not subject to application user fees unless the application includes an indication other than the orphan indication and may be exempt from program fees if certain criteria are met. We are not at the stage of development with our products where we are subject to these fees, but they are significant expenditures that may be incurred in the future and must be paid at the time of application submissions to the FDA.

Satisfaction of FDA requirements typically takes many years. The actual time required varies substantially, based upon the type, complexity, and novelty of the pharmaceutical product, among other things. Government regulation imposes costly and time-consuming requirements and restrictions throughout the product life cycle and may delay product marketing for a considerable period of time, limit product marketing, or prevent marketing altogether. Success inpre-clinical or early stage clinical trials does not ensure success in later stage clinical trials. Data obtained frompre-clinical and clinical activities are not always conclusive and may be susceptible to varying interpretations that could delay, limit, or prevent marketing approval. Even if a product receives marketing approval, the approval is limited to specific clinical indications. Further, even after marketing approval is obtained, the discovery of previously unknown problems with a product may result in restrictions on the product or even complete withdrawal of the product from the market.

After product approval, there are continuing significant regulatory requirements imposed by the FDA, including record-keeping requirements, obligations to report adverse side effects in patients using the products, and restrictions on advertising and promotional activities. Quality control and manufacturing procedures must continue to conform to cGMPs, and the FDA periodically inspects facilities to assess cGMP compliance. Additionally, post-approval changes in ingredient composition, manufacturing processes or facilities, product labeling, or other areas may require submission of a NDA Supplement to the FDA for review and approval. New indications will require additional clinical studies and submission of a NDA Supplement.

Failure to comply with FDA regulatory requirements may result in an enforcement action by the FDA, including clinical holds, refusal to approve marketing applications or supplements, Warning Letters, product recalls, suspension or revocation of product approval, seizure of product to prevent distribution, impositions of injunctions prohibiting product manufacture or distribution, and civil and criminal penalties, among other actions. Maintaining compliance is costly and time-consuming. We cannot be certain that we, or our present or future suppliers or third-party manufacturers, will be able to comply with all FDA regulatory requirements, and potential consequences of noncompliance could have a material adverse impact on our business prospects.

The FDA’s policies may change, and additional governmental regulations may be enacted that could delay, limit, or prevent regulatory approval of our products or affect our ability to manufacture, market, or distribute our products after approval. Moreover, increased attention to the containment of healthcare costs in the U.S. and in foreign markets could result in new government regulations that could have a material adverse effect on our business. Our ability to commercialize future products will depend in part on the extent to which coverage and reimbursement for the products will be available from government and health administration authorities, private health insurers, and other third-party payers. European Union member states and U.S. government and other third-party payers increasingly are attempting to contain healthcare costs by consideration of new laws and regulations limiting both coverage and the level of reimbursement for new drugs. Our failure to obtain coverage, an adequate level of reimbursement, or acceptable prices for our future products could diminish any revenues we may be able to generate. We cannot predict the likelihood, nature or extent of adverse governmental regulation that might arise from future legislative or administrative action, either in the U.S. or abroad.

Our activities also may be subject to state laws and regulations that affect our ability to develop and sell our products. We are also subject to numerous federal, state, and local laws relating to such matters as safe working conditions, clinical, laboratory, and manufacturing practices, environmental protection, fire hazard control, and disposal of hazardous or potentially hazardous substances. We may incur significant costs to comply with such laws and regulations now or in the future, and the failure to comply may have a material adverse impact on our business prospects.

The FDCA includes provisions designed to facilitate the development and expedite the review of drugs and biological products intended for treatment of serious or life-threatening conditions that demonstrate the potential to address unmet medical needs for such conditions. These provisions set forth a procedure for designation of a drug as a “fast track product”. The fast track designation applies to the combination of the product and specific indication for which it is being studied. A product designated as fast track is ordinarily eligible for additional programs for expediting development and review, such as increased FDA interactions and rolling submission and review of the application. Products that are intended to treat serious or life-threatening conditions and that provide a meaningful therapeutic benefit over existing treatments may also be eligible for accelerated approval. Drug approval under the accelerated approval regulations may be based on evidence of clinical effect on a surrogate endpoint that is reasonably likely to predict clinical benefit. A post-marketing clinical study will be required to verify clinical benefit, and other restrictions to assure safe use may be imposed. Failure to conduct required post-approval studies, or confirm a clinical benefit, will allow the FDA to withdraw the drug or biologic from the market on an expedited basis. A third potential designation that may be available is breakthrough therapy designation. A breakthrough therapy is a product that is intended, alone or in combination with one or more other products, to treat a serious or life-threatening disease or condition, and preliminary clinical evidence indicates that the product may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints. Products designated as breakthrough therapies are eligible for intensive FDA guidance, a commitment from the FDA to involve senior managers and experienced review staff in a proactive collaborative and cross-disciplinary review, rolling submission and review of the application, and the facilitation of cross-disciplinary review. Finally, if a product is intended to treat a serious condition and, if approved, would provide significant improvements in the safety or effectiveness of the treatment, diagnosis, or prevention of the condition, the product may be eligible for priority review meaning that FDA’s goal for the review of an NDA is shortened to six months from FDA’s acceptance of the application, rather than the standard review of ten months from application acceptance. We do not currently have fast track designation for any of our clinical programs. If we should seek such designation for any of our programs, however, we cannot be assured that it will be granted by the FDA. There is also no guarantee that we will be able to maintain any designation that we may receive.

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Under the Drug Price Competition and Patent Term Restoration Act of 1984, a sponsor may obtain marketing exclusivity for a specified period of time following FDA approval of certain drug applications, regardless of patent status, if the drug is a new chemical entity or if new clinical studies, that are not bioavailability or bioequivalence studies, were required to support the marketing application for the drug. This marketing exclusivity generally prevents a third party from obtaining FDA approval for an identical or nearly identical drug under an Abbreviated New Drug Application or a “505(b)(2) New Drug Application”. The period of the marketing exclusivity and the specific effect differs depending on whether the exclusivity is based upon a drug’s new chemical entity status or whether it is based on the conduct of new clinical studies. The marketing exclusivity, however, is not absolute. For example, marketing exclusivity will not prevent FDA from approving full NDAs. Following NDA approval, the statute also allows a patent owner to obtain an extension of a single unexpired patent that has not previously been extended for a period equal toone-half the period of time elapsed between the filing of an IND and the filing of the corresponding NDA plus the period of time between the filing of the NDA and FDA approval, with a five year maximum patent extension. The total patent life of the product with the extension cannot exceed fourteen years from the product’s approval date. The period of patent extension may also be reduced for any time that the applicant did not act with due diligence. We cannot be certain that we will be able to take advantage of either the patent term extension or marketing exclusivity provisions of these laws or that, if received, they will adequately protect any approved products from competition.

The Best Pharmaceuticals for Children Act (“BPCA”), signed into law on January 4, 2002, was reauthorized and amended by the FDA Amendments Act of 2007 (“FDAAA”). The reauthorization of BPCA adds an additional six months of marketing exclusivity and patent protection to unexpired exclusivities and unexpired patents listed with FDA for NDA applicants that conduct acceptable pediatric studies of new and currently-marketed drug products for which pediatric information would be beneficial, as identified by the FDA in a Pediatric Written Request. The Pediatric Research Equity Act (“PREA”), signed into law on December 3, 2003, also was reauthorized and amended by the FDAAA. The reauthorization of PREA requires that most applications for drugs and biologics include a pediatric assessment (unless waived or deferred) to ensure the drugs’ and biologics’ safety and effectiveness in children. Such pediatric assessment must contain data, gathered using appropriate formulations for each age group for which the assessment is required, that are adequate to assess the safety and effectiveness of the drug or the biological product for the claimed indications in all relevant pediatric subpopulations, and to support dosing and administration for each pediatric subpopulation for which the drug or the biological product is safe and effective. The pediatric assessments can only be deferred provided there is a timeline for the completion of such studies. The FDA may waive (partially or fully) the pediatric assessment requirement for several reasons, including if the applicant can demonstrate that reasonable attempts to produce a pediatric formulation necessary for that age group have failed. Orphan products are also exempt from the PREA requirements. The Food and Drug Administration Safety and Innovation Act signed into law on July 9, 2012, permanently renewed and strengthened BPCA and PREA.

Under the FDA Reauthorization Act of 2017, beginning in 2020, sponsors submitting applications for product candidates intended for the treatment of adult cancer which are directed at molecular targets that the FDA determines to be substantially relevant to the growth or progression of pediatric cancer must submit, with the application, reports from molecularly targeted pediatric cancer investigations designed to yield clinically meaningful pediatric study data, using appropriate formulations, to inform potential pediatric labeling. While orphan products are not exempt from this requirement, the FDA may grant full or partial waivers, or deferrals, for submission of data.

Under the Orphan Drug Act, the FDA may grant orphan drug designation to drugs intended to treat a “rare disease or condition,” which generally is a disease or condition that affects fewer than 200,000 individuals in the U.S. Orphan drug designation does not convey any advantage in, or shorten the duration of, the regulatory review and approval process. If a product which has an orphan drug designation subsequently receives the first FDA approval for the indication for which it has such designation, the product is entitled to orphan exclusivity, i.e., the FDA may not approve any other applications to market the same drug for the same indication for a period of seven years, except in limited circumstances. Pracinostat has been granted orphan drug designation by the FDA for the treatment of AML, but it may not receive orphan designation for other indications. Our other products may not be eligible for orphan drug status or be designated as orphan drugs. Even if designated as orphan drugs, our products may not be approved before other applications or granted orphan drug exclusivity if approved.

Foreign Regulatory Requirements

Outside the U.S., our ability to market our products will also be contingent upon receiving marketing authorizations from the appropriate regulatory authorities and compliance with applicable post-approval regulatory requirements. Although the specific requirements and restrictions vary from country to country, as a general matter, foreign regulatory systems include risks similar to those associated with FDA regulation, described above.

Under European Union regulatory systems, marketing authorizations may be submitted either under a centralized or a decentralized procedure (“DCP”). Under the centralized procedure, a single application to the EMA leads to an approval granted by the European Commission which permits the marketing of the product throughout the EU. The centralized procedure is mandatory for certain classes of medicinal products, but optional for others. For example, all medicinal products developed by certain biotechnological means, and those developed for cancer and other specified diseases and disorders, must be authorized via the centralized procedure. The centralized procedure will apply to any of our products that are developed by means of a biotechnology process or are intended for treatment of cancer. The DCP is used for products that are not required to be authorized by the centralized procedure. Under the DCP (where there is no pre-existing marketing authorization granted by one member state) or mutual recognition procedure (“MRP”) an application for a marketing authorization is submitted to the competent authority of one member state of the EU (the reference member state). The holders of a national marketing authorization may submit further applications to the competent authorities of any or all the remaining member states (the concerned member states). The DCP enables applicants to submit an identical application to the competent authorities of all member states where approval is sought at the same time as the first application, while under the MRP, products are authorized initially in one member state, and other member states where approval is sought are then requested to recognize the original authorization based upon an assessment report prepared by the original authorizing competent authority. Under the decentralized and mutual recognition procedures, the reference member state assessment takes 210 days (MRP) or 120 days (DCP) and the concerned member states process should take no longer than 90 days. However, if one member state makes an objection, which under the legislation can only be based on a possible risk to human health, the application will be automatically referred to the Committee for Medicinal Products for Human Use (“CHMP”) of the EMA. If a referral for arbitration is made, the procedure is suspended. However, member states that have already approved the application may, at the request of the applicant, authorize the product in question without waiting for the result of the arbitration. Such authorizations will be without prejudice to the outcome of the arbitration. For all other concerned member states, the opinion of the CHMP, which is binding, could support or reject the objection or alternatively could reach a compromise position acceptable to all EU countries concerned. The arbitration procedure may take an additional year before a final decision is reached and may require the delivery of additional data.

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As with FDA approval, we may not be able to secure regulatory approvals in the EU in a timely manner, if at all. Additionally, as in the U.S., post-approval regulatory requirements, such as those regarding product manufacture, marketing, or distribution, would apply to any product that is approved in the EU, and failure to comply with such obligations could have a material adverse effect on our ability to successfully commercialize any product.

The conduct of clinical trials in the European Union is governed by the European Clinical Trials Directive, which was implemented in May 2004. This Directive governs how regulatory bodies in member states control clinical trials. No clinical trial may be started without a clinical trial authorization granted by the national competent authority and favorable ethics approval. New legislation to revise and replace the European Clinical Trials Directive has been passed but is not yet implemented (currently estimated for 2020).

Accordingly, there is a marked degree of change and uncertainty both in the regulation of clinical trials and in respect of marketing authorizations which we face for our products in the EU.

Manufacturing

We do not have the facilities or capabilities to commercially manufacture any of our drug candidates. We are and expect to continue to be dependent on contract manufacturers for supplying our existing and future candidates for clinical trials and commercial scale manufacturing of our candidates in accordance with regulatory requirements, including cGMP. Contract manufacturers may utilize their own technology, technology developed by us, or technology acquired or licensed from third parties. FDA approval of the manufacturing procedures and the site will be required prior to commercial distribution.

Employees

As of June 30, 2019, we had 40 employees, 13 of whom hold a Ph.D. or M.D. degree. Other personnel resources are used from time to time as consultants or third party service organizations on anas-needed basis. All members of our senior management team have prior experience with pharmaceutical, biotechnology or medical product companies. We believe that we have been successful in attracting skilled and experienced personnel, but there can be no assurance that we will be able to attract and retain the individuals needed. None of our employees are represented by a collective bargaining agreement, nor have we experienced work stoppages. We believe that our relations with our employees are good.

Available Information

Our annual reports on Form10-K, quarterly reports on Form10-Q, current reports on Form8-K, and amendments to those reports filed with or furnished to the Securities and Exchange Commission pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, are available free of charge through our website at www.meipharma.com as soon as reasonably practicable after they are electronically filed with, or furnished to, the Securities and Exchange Commission.

Item 1A. Risk Factors

Investment in our securities involves a high degree of risk. You should consider carefully the risks described below, together with other information in this Annual Report and other public filings, before making investment decisions regarding our securities. If any of the following events actually occur, our business, operating results, prospects or financial condition could be materially and adversely affected. This could cause the trading price of our common stock to decline and you may lose all or part of your investment. Moreover, the risks described below are not the only ones that we face. Additional risks not presently known to us or that we currently deem immaterial may also affect our business, operating results, prospects or financial condition.

Risks Related to Our Business and Industry

We will need substantial additional funds to progress the clinical trial program for our drug candidates, and to develop new compounds. The actual amount of funds we will need will be determined by a number of factors, some of which are beyond our control.

We will need substantial additional funds to progress the clinical trial program for our drug candidates and to develop any additional compounds. The factors that will determine the actual amount of funds that we will need to progress the clinical trial programs may include, but are not limited to, the following:

• the therapeutic indications for use being developed;

• the clinical trial endpoint required to achieve regulatory approval;

• the number of clinical trials required to achieve regulatory approval;

• the number of sites included in the trials;

• the length of time required to enroll suitable patients;

• the number of patients who participate in the trials and the rate that they are recruited;

• the number of treatment cycles patients complete while they are enrolled in the trials;

• costs and potential difficulties encountered in manufacturing sufficient drug product for the trials; and

• the efficacy and safety profile of the product.

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We have been opportunistic in our efforts to obtain cash, and we expect to continue to evaluate various funding alternatives from time to time. If we obtain additional funding, it may adversely affect the market price of our common stock and may be dilutive to existing stockholders. If we are unable to obtain additional funds on favorable terms or at all, we may be required to cease or reduce our operations. We may sell additional shares of common stock, and securities exercisable for or convertible into shares of our common stock, to satisfy our capital and operating needs; however, such transactions will be subject to market conditions and there can be no assurance any such transactions will be completed.

We are a clinical research and development stage company and are likely to incur operating losses for the foreseeable future.

You should consider our prospects in light of the risks and difficulties frequently encountered by clinical research stage and developmental companies. We have incurred net losses of $231.2 million from our inception through June 30, 2019, including a net loss of $44.5 million for the year ended June 30, 2019 (excluding $27.6 million ofnon-cash income resulting from a change in the fair value of our warrant liability), a net loss of $30.4 million for the year ended June 30, 2018 (excluding a $9.7 millionnon-cash expense resulting from a change in the fair value of our warrant liability), and net income of $2.7 million for the year ended June 30, 2017. We anticipate that we will incur operating losses and negative operating cash flow for the foreseeable future. We have not yet commercialized any drug candidates and cannot be sure that we will ever be able to do so, or that we may ever become profitable.

If Helsinn or other parties with whom we collaborate on the development and commercialization of our drug candidates do not satisfy their obligations or if they terminate their agreements with us, we may not be able to develop or commercialize our drug candidates.

In August 2016, we entered into an exclusive license, development and commercialization agreement with Helsinn to collaborate on the global development, manufacturing and commercialization of pracinostat. In October 2018, we entered into an agreement with KKC to collaborate on the development, manufacturing and commercialization ofME-401 in Japan. We may enter into additional agreements to collaborate with other third parties on the development, manufacturing or commercialization of our drug candidates in the future. In connection with these agreements, we may grant certain rights regarding the use of our patents and technology. The counterparties may be responsible for development, manufacturing or commercialization of our drug candidates and the costs related thereto.

Our counterparties might not fulfill all of their obligations to us. Our ability to receive revenue from our drug candidates may be dependent upon their efforts. If they fail to devote adequate resources or otherwise does not successfully develop, commercialize or manufacture our drug candidates, we may not receive the future milestone payments or royalties provided for in the agreement. In addition, under certain circumstances, including our failure to satisfy our obligations under the agreement, the counterparty may have the right to terminate the agreement.

We could also become involved in disputes with our counterparties, which could lead to delays in or termination of the agreement and time-consuming and expensive litigation or arbitration.

If our counterparties are unwilling or unable to fulfill their obligations or if the agreement is terminated, we may lack sufficient resources to develop and commercialize our drug candidates on our own and may be unable to reach agreement with a suitable alternative collaborator. The failure to develop and commercialize our drug candidates would have a material adverse effect on our business, operating results, prospects and financial condition.

We are subject to significant obligations to Presage in connection with our license of voruciclib, and we may become subject to significant obligations in connection with future licenses we obtain, which could adversely affect the overall profitability of any products we may seek to commercialize, and such licenses of drug candidates, the development and commercialization for which we are solely responsible, may never become profitable.

In September 2017, we entered into a license agreement with Presage (“the Presage License Agreement”). Under the terms of the agreement, Presage granted us exclusive worldwide rights to develop, manufacture and commercialize voruciclib, a clinical-stage, oral and selective CDK inhibitor, and related compounds. In exchange, we paid Presage $2.9 million and are obligated for additional potential payments of up to $181 million upon the achievement of certain development, regulatory and commercial milestones. We will also paymid-single-digit tiered royalties on the net sales of any product successfully developed pursuant to such agreement. We are also subject to continuing payment obligations to S*Bio in connection with our acquisition of patents and patent applications relating to pracinostat in August 2012. We may enter into similar agreements in the future that require us to make significant payments upon obtainment of development, regulatory or commercial milestones. We may be obligated to make milestone or royalty payments when we do not have the cash on hand to make these payments or have available cash for our other development efforts. These milestone and royalty payments could adversely affect the overall profitability for us of any products that we may seek to commercialize. In addition, if we fail to comply with our obligations under the license agreement, the counterparty may have the right to terminate the agreement. In such a case, we would lose our rights to the intellectual property covered by the license agreement and we would not be able to develop, manufacture or commercialize our drug candidates.

The profitability of our license agreement with Presage depends on the successful development, regulatory approval and commercialization of voruciclib. We are solely responsible for the development and commercialization of voruciclib, including the related costs. Drug development is a long, expensive and uncertain process and delay or failure can occur at any stage of our clinical trials. We cannot be certain that we will ever receive regulatory approval for voruciclib or that it will be successfully commercialized, even if approved.

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The results ofpre-clinical studies and completed clinical trials are not necessarily predictive of future results, and our current drug candidates may not have favorable results in later studies or trials.

Pre-clinical studies and Phase 1 and Phase 2 clinical trials are an expensive and uncertain process that may take years to complete.Pre-clinical studies and Phase 1 and Phase 2 clinical trials are not primarily designed to test the efficacy of a drug candidate, but rather to test safety, to study pharmacokinetics and pharmacodynamics, and to understand the drug candidate’s side effects at various doses and schedules. Favorable results in early studies or trials may not be repeated in later studies or trials, including ongoingpre-clinical studies, large-scale Phase 3 clinical trials, or other studies intended as registration trials, and our drug candidates in later-stage trials may fail to show desired safety and efficacy despite having progressed through earlier-stage trials. Interim results may also not be predictive of the final results of a clinical study. Moreover, comparisons of results across different studies should be viewed with caution as such comparisons are limited by a number of factors, including differences in study designs and populations. Such comparisons also will not provide a sufficient basis for any comparative claims following product approval. Unfavorable results from ongoingpre-clinical studies or clinical trials could result in delays, modifications or abandonment of ongoing or future clinical trials, or abandonment of a clinical program.Pre-clinical and clinical results are frequently susceptible to varying interpretations that may delay, limit or prevent regulatory approvals or commercialization. Negative or inconclusive results or adverse medical events during a clinical trial could cause a clinical trial to be delayed, repeated or terminated, or a clinical program to be abandoned.

Final approval by regulatory authorities of our drug candidates for commercial use may be delayed, limited or prevented, any of which would adversely affect our ability to generate operating revenues.

We will not generate any operating revenue until we, a licensee, or a potential collaborator successfully commercialize one of our drug candidates. Currently, we have drug candidates at different stages of development, and each will need to successfully complete certain clinical studies and obtain regulatory approval before potential commercialization. We may experience unforeseen events during product development that may substantially delay or prevent product approval. For example, the FDA may order the temporary, or permanent, discontinuation of a clinical trial at any time if it believes that the clinical trial either is not being conducted in accordance with FDA requirements or presents an unacceptable risk to the clinical trial patients. An IRB may also require the clinical trial at the site to be halted, either temporarily or permanently, for failure to comply with the IRB’s requirements or if the trial poses an unexpected serious harm to clinical trial patients. The FDA or an IRB may also impose conditions on the conduct of a clinical trial. Clinical trial sponsors may also choose to discontinue clinical trials as a result of risks to clinical trial patients, a lack of favorable results, or changing business priorities.

Thepre-clinical and clinical development, manufacturing, labeling, packaging, storage, recordkeeping, export, marketing and distribution, and other possible activities relating to our drug candidates are subject to extensive regulation by the FDA and other regulatory agencies. Failure to comply with applicable regulatory requirements may, either before or after product approval, subject us to administrative or judicially imposed sanctions that may negatively impact the approval of one or more of our drug candidates or otherwise negatively impact our business.

Neither collaborators, licensees nor we are permitted to market a drug candidate in the United States until the particular drug candidate is approved for marketing by the FDA. Specificpre-clinical data, chemistry, manufacturing and controls data, a proposed clinical trial protocol and other information must be submitted to the FDA as part of an IND application, and clinical trials may commence only after the IND application becomes effective. To market a new drug in the United States, we must submit to the FDA and obtain FDA approval of an NDA. An NDA must be supported by extensive clinical andpre-clinical data, as well as extensive information regarding chemistry, manufacturing and controls to demonstrate the safety and effectiveness of the drug candidate.

Obtaining approval of an NDA can be a lengthy, expensive and uncertain process. Regulatory approval of an NDA is not guaranteed. The number and types ofpre-clinical studies and clinical trials that will be required for FDA approval varies depending on the drug candidate, the disease or condition that the drug candidate is designed to target and the regulations applicable to any particular drug candidate. Despite the time and expense exerted inpre-clinical and clinical studies, failure can occur at any stage, and we could encounter problems that delay our product candidate development or that cause us to abandon clinical trials or to repeat or perform additionalpre-clinical studies and clinical trials. The FDA can delay, limit or deny approval of a drug candidate for many reasons, and product candidate development programs may be delayed or may not be successful for many reasons including but not limited to, the following:

• The FDA or IRBs may not authorize us to commence, amend, or continue clinical studies;

• we may not be able to enroll a sufficient number of qualified patients for clinical trials in a timely manner or at all, patients may drop out of our clinical trials or be lost to follow-up at a higher rate than we anticipate, patients may not follow the clinical trial procedures, or the number of patients required for clinical trials may be larger than we anticipate;

• a drug candidate may not be deemed adequately safe or effective for an intended use;

• the FDA may not find the data frompre-clinical studies and clinical trials sufficient;

• the FDA may require that we conduct additional pre-clinical or clinical studies, change our manufacturing process, or gather additional manufacturing information above what we currently have planned for;

• the FDA’s interpretation and our interpretation of data frompre-clinical studies and clinical trials may differ significantly;

• the FDA may not agree with our intended indications, the design of our clinical or pre-clinical studies, or there may be a flaw in the design that does not become apparent until the studies are well advanced;

• we may not be able to establish agreements with contractors or collaborators or they or we may fail comply with applicable FDA and other regulatory requirements, including those identified in other risk factors;

• the FDA may not approve the manufacturing processes or facilities;

• the FDA may change its approval policies or adopt new regulations; or

• the FDA may not accept an NDA or other submission due to, among other reasons, the content or formatting of the submission.

Ourpre-clinical and clinical data, other information and procedures relating to a drug candidate may not be sufficient to support approval by the FDA or any other U.S. or foreign regulatory authority, or regulatory interpretation of these data and procedures may be unfavorable. Our efforts to take advantage of expedited regulatory pathways for serious or life-threatening illnesses, such as accelerated approval, to secure marketing authorization more quickly may not be successful. Securing accelerated approval requires demonstrating a meaningful therapeutic benefit over available existing treatments, and, in addition, FDA will require post-marketing studies to verify clinical benefit. Failure to conduct required post-approval studies, or confirm a clinical benefit, will allow the FDA to withdraw the drug from the market on an expedited basis. Our business and reputation may be harmed by any failure or significant delay in receiving regulatory approval for the sale of any drugs resulting from our drug candidates. As a result, we cannot predict when or whether regulatory approval will be obtained for any drug we develop.

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Additionally, other factors may serve to delay, limit or prevent the final approval by regulatory authorities of our drug candidates for commercial use, including, but not limited to:

• ME-401, voruciclib,ME-344 and pracinostat are in various stages of development, and we or our licensees will need to conduct significant clinical testing and development work to demonstrate the quality, safety, and efficacy of these drug candidates before applications for marketing can be filed with the FDA, or with the regulatory authorities of other countries;

• development and testing of product formulation, including identification of suitable excipients, or chemical additives intended to facilitate delivery of our drug candidates;

• it may take us many years to complete the testing of our drug candidates, and failure can occur at any stage of this process; and

• negative or inconclusive results or adverse medical events during a clinical trial could cause us to delay or terminate our development efforts.

The successful development of any of these drug candidates is uncertain and, accordingly, we may never commercialize any of these drug candidates or generate significant revenue.

Changes in funding for the FDA and other government agencies or future government shutdowns could cause delays in the submission and regulatory review of marketing applications, which could negatively impact our business or prospects.

The ability of the FDA to review and approve new products can be affected by a variety of factors, including government budget and funding levels, ability to hire and retain key personnel and accept submission, applications, and the payment of user fees, and statutory, regulatory, and policy changes. In addition, government funding of other government agencies that fund research and development activities is subject to the political process, which is inherently fluid and unpredictable.

Disruptions at the FDA and other agencies may also slow the time necessary for new drugs to be reviewed and/or approved by necessary government agencies, which would adversely affect our business. For example, over the last several years, including for 35 days beginning on December 22, 2018, the U.S. government has shut down several times and certain regulatory agencies, such as the FDA, had to furlough critical FDA employees and stop critical activities. If a prolonged government shutdown occurs, it could significantly impact the ability of the FDA to timely review and process our regulatory submissions, which could have a material adverse effect on our business or prospects.

Failure to obtain regulatory approval in foreign jurisdictions would prevent us from marketing our products internationally.

We intend to have our drug candidates marketed outside the United States. In order to market our products in manynon-U.S. jurisdictions, we must obtain separate regulatory approvals and comply with numerous and varying regulatory requirements. To date, we have not filed for marketing approval for any of our drug candidates and may not receive the approvals necessary to commercialize our drug candidates in any market.

The approval procedure varies among countries and may include all of the risks associated with obtaining FDA approval. Further, the time required to obtain foreign regulatory approval may differ from that required to obtain FDA approval, and additionalpre-clinical studies, clinical trials, other testing and data review may be required. We may not obtain foreign regulatory approvals on a timely basis, if at all. Additionally, approval by the FDA does not ensure approval by regulatory agencies in other countries, and approval by one foreign regulatory authority does not ensure approval by regulatory agencies in other foreign countries or by the FDA. However, a failure or delay in obtaining regulatory approval in one jurisdiction may have a negative effect on the regulatory approval process in other jurisdictions, including approval by the FDA. The failure to obtain regulatory approval in foreign jurisdictions could limit commercialization of our products, reduce our ability to generate profits and harm our business.

The Breakthrough Therapy Designation granted by the FDA to pracinostat for the treatment of AML and any additional Breakthrough Therapy Designation granted by the FDA for any of our product candidates or other indications of pracinostat, may not lead to a faster development or regulatory review or approval process, and does not increase the likelihood that our product candidates will receive marketing approval.

In August 2016, the FDA granted Breakthrough Therapy Designation to pracinostat for the treatment of AML. We may also seek such designation for our other drug product candidates if our clinical data supports such a designation. A Breakthrough Therapy is defined as a drug that is intended, alone or in combination with one or more other drugs, to treat a serious or life-threatening disease or condition, and preliminary clinical evidence indicates that the drug may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. For drugs that have been designated as Breakthrough Therapies, interaction and communication between the FDA and the sponsor can help to identify the most efficient path for development.

Designation as a Breakthrough Therapy is within the discretion of the FDA. Accordingly, even if we believe that one of our product candidates meets the criteria for designation as a Breakthrough Therapy, the FDA may disagree and instead determine not to make such designation. However, the potential reduced timelines associated with Breakthrough Therapy Designation may introduce significant chemistry, manufacturing and controls challenges for product development as manufacturing development may need to take place at a faster pace than would otherwise be required because the FDA will expect that properly qualified and manufactured product be available at the time of product approval. In any event, the receipt of a Breakthrough Therapy Designation for a product candidate may not result in a faster development process, review or approval compared to drugs considered for approval under conventional FDA procedures and does not assure ultimate approval by the FDA. In addition, even after granting a Breakthrough Therapy Designation, the FDA may later decide that such product candidates no longer meet the conditions for qualification and rescind such designations.

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Any orphan drug designations we receive may not confer marketing exclusivity or other benefits.

In the United States, under the Orphan Drug Act, the FDA may grant orphan designation to a drug or biological product intended to treat a rare disease or condition. Such diseases and conditions are those that affect fewer than 200,000 individuals in the United States, or if they affect more than 200,000 individuals in the United States, there is no reasonable expectation that the cost of developing and making a drug available in the United States for these types of diseases or conditions will be recovered from sales of the drug. Orphan drug designation must be requested before submitting an NDA. If the FDA grants orphan drug designation, the identity of the therapeutic agent and its potential orphan use are disclosed publicly by that agency. Orphan drug designation does not convey any advantage in or shorten the duration of the regulatory review and approval process, but it can lead to financial incentives, such as opportunities for grant funding toward clinical trial costs, tax advantages anduser-fee waivers.

If a drug that has orphan designation subsequently receives the first FDA approval for the disease or condition for which it has such designation, the drug is entitled to orphan drug marketing exclusivity for a period of seven years. Orphan drug marketing exclusivity generally prevents the FDA from approving another application, including a full NDA, to market the same drug or biological product for the same indication for seven years, except in limited circumstances, including if the FDA concludes that the later drug is safer, more effective or makes a major contribution to patient care. For purposes of small molecule drugs, the FDA defines “same drug” as a drug that contains the same active moiety and is intended for the same use as the drug in question. We may not be able to obtain future orphan drug designations that we may apply for or maintain any orphan drug designations that we may receive. A designated orphan drug also may not receive orphan drug marketing exclusivity if it is approved for a use that is broader than the indication for which it received orphan designation.

In January 2018, the EMA granted orphan drug designation to pracinostat for the treatment of AML. The European exclusivity period is ten years but can be reduced to six years if the drug no longer meets the criteria for orphan drug designation or if the drug is sufficiently profitable so that market exclusivity is no longer justified. Orphan designation does not convey any advantage in, or shorten the duration of, the regulatory review and approval process.

Orphan drug exclusivity may be lost if the FDA or EMA determines that the request for designation was materially defective or if the manufacturer is unable to assure sufficient quantity of the drug to meet the needs of patients with the rare disease or condition. Orphan drug exclusivity also may not protect a product from competition. For instance, the FDA may approve a drug that is the same drug with orphan exclusivity for a different indication or a different drug for the same indication as the orphan product. Even after an orphan product is approved, the FDA can also subsequently approve a product containing the same principal molecular features for the same condition if the FDA concludes that the latter product is clinically superior. The FDA may further grant orphan designation to multiple sponsors for the same compound or active molecule and for the same indication. If another sponsor receives FDA approval for such product before we do, we would be prevented from launching our product in the United States for the orphan indication for a period of at least seven years unless we can demonstrate clinical superiority.

A Fast Track Designation by the FDA, even if granted for any of our product candidates, may not lead to a faster development or regulatory review or approval process and does not increase the likelihood that our product candidates will receive marketing approval.

We do not currently have Fast Track Designation for any of our product candidates but may seek Fast Track Designation if our clinical data supports such a designation. If a drug is intended for the treatment of a serious or life-threatening condition and the drug demonstrates the potential to address unmet medical needs for this condition, the drug sponsor may apply to the FDA for Fast Track Designation. The FDA has broad discretion whether to grant this designation. Even if we believe a specific product candidate is eligible for this designation, we cannot assure you that the FDA would decide to grant it. Even if we do receive Fast Track Designation, we may not experience a faster development process, review or approval compared to conventional FDA procedures. The FDA may withdraw Fast Track Designation if it believes that the designation is no longer supported by data from our clinical development program. Many drugs that have received Fast Track Designation have failed to obtain drug approval.

Even if we or our licensees receive regulatory approval to commercialize our drug candidates, our ability to generate revenues from any resulting products will be subject to a variety of risks, many of which are out of our control.

Even if our drug candidates obtain regulatory approval, resulting products may not gain market acceptance among physicians, patients, healthcare payers or the medical community. We believe that the degree of market acceptance and our ability to generate revenues from such products will depend on a number of factors, including, but not limited to, the following:

• timing of market introduction of our drugs and competitive drugs;

• actual and perceived efficacy and safety of our drug candidates;

• prevalence and severity of any side effects;

• potential or perceived advantages or disadvantages over alternative treatments;

• potential post-marketing commitments imposed by regulatory authorities, such as patient registries;

• strength of sales, marketing and distribution support;

• price of our future products, both in absolute terms and relative to alternative treatments;

• the effect of current and future healthcare laws on our drug candidates; and

• availability of coverage and reimbursement from government and other third-party payers.

If any of our drugs are approved and fail to achieve market acceptance, we may not be able to generate significant revenue to achieve or sustain profitability.

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If any products we develop become subject to unfavorable pricing regulations, third-party reimbursement practices or healthcare reform initiatives, our ability to successfully commercialize our products will be impaired.

Our future revenues, profitability and access to capital will be affected by the continuing efforts of governmental and private third-party payers to manage, contain or reduce the costs of health care through various means, such as capping prices, limiting price increases, reducing reimbursement, and requiring rebates. We are also unsure of the impact that the potential repeal of health care reform legislation or other changes in healthcare policy resulting from executive orders or court decisions may have on our business or what actions federal, state, foreign and private payers may take or reforms that may be implemented in the future. Therefore, it is difficult to predict the effect of any potential reform on our business. Our ability to commercialize our drug candidates successfully will depend, in part, on the extent to which reimbursement for the cost of such drug candidates and related treatments will be available from government health administration authorities, such as Medicare and Medicaid in the United States, private health insurers and other organizations. Significant uncertainty exists as to the reimbursement status of newly approved health care products, particularly for indications for which there is no current effective treatment or for which medical care typically is not sought. Adequate third-party coverage may not be available to enable us to maintain price levels sufficient to realize an appropriate return on our investment in research and development. If adequate coverage and reimbursement levels are not provided by government and third-party payers for use of our products, our products may fail to achieve market acceptance without a substantial reduction in price or at all and our results of operations will be harmed.

Further, there has been heightened governmental scrutiny over the manner in which manufacturers set prices for their marketed products, which have resulted in several recent Congressional inquiries and proposed and enacted bills by Congress and the states designed to, among other things, bring more transparency to product pricing, review the relationship between pricing and manufacturer patient programs, and reform government program reimbursement methodologies for products. In addition, the United States government, state legislatures, and foreign governments have shown significant interest in implementing cost containment programs, including price-controls, restrictions on reimbursement and requirements for substitution of generic products for branded prescription drugs to limit the growth of government paid health care costs. For example, the United States government has passed legislation requiring pharmaceutical manufacturers to provide rebates and discounts to certain entities and governmental payors to participate in federal healthcare programs. Further, Congress and the current administration have each indicated that it will continue to seek new legislative and/or administrative measures to control drug costs, and the current administration recently released a “Blueprint”, or plan, to reduce the cost of drugs. The current administration’s Blueprint contains certain measures that the U.S. Department of Health and Human Services is already working to implement. Individual states in the United States have also been increasingly passing legislation and implementing regulations designed to control pharmaceutical product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing.

Even if our drug candidates obtain regulatory approval, we and our collaborators will be subject to ongoing government regulation.

Even if regulatory authorities approve any of our drug candidates, the manufacture, marketing and sale of these drugs will be subject to strict and ongoing regulation. Compliance with such regulations may consume substantial financial and management resources and expose us and our collaborators to the potential for other adverse circumstances. For example, a regulatory authority can place restrictions on the sale or marketing of a drug in order to manage the risks identified during initial clinical trials or after the drug is on the market. A regulatory authority can condition the approval for a drug on costly post-marketingfollow-up studies. Based on these studies, if a regulatory authority does not believe that the drug demonstrates a clinical benefit to patients or an acceptable safety profile, it could limit the indications for which a drug may be sold or revoke the drug’s marketing approval. In addition, identification of certain side effects either during clinical trials or after a drug is on the market may result in reformulation of a drug, additionalpre-clinical and clinical trials, labeling changes, termination of ongoing clinical trials or withdrawal of approval. Any of these events could delay or prevent us from generating revenue from the commercialization of these drugs and cause us to incur significant additional costs.

We may not be able to establish the contractual arrangements necessary to develop, market and distribute our drug candidates.

A key part of our strategy is to establish contractual relationships with third parties to package, market and distribute our drug candidates. There is no assurance that we will be able to negotiate commercially acceptable licensing or other agreements for the future exploitation of our drug candidates, including continued clinical development, manufacture or marketing. If we are unable to successfully contract for these services, or if arrangements for these services are terminated, we may have to delay our commercialization program which will adversely affect our ability to generate operating revenues.

Our commercial opportunity will be reduced or eliminated if competitors develop and market products that are more effective, have fewer side effects or are less expensive than our drug candidates.

The development of drug candidates is highly competitive. A number of other companies have products or drug candidates that have either been approved or are in various stages ofpre-clinical or clinical development that are intended for the same therapeutic indications for which our drug candidates are being developed. Some of these potential competing drug candidates are further advanced in development than our drug candidates and may be commercialized sooner. Even if we are successful in developing effective drugs, our compounds may not compete successfully with products produced by our competitors.

Our competitors include pharmaceutical companies and biotechnology companies, as well as universities and public and private research institutions. In addition, companies active in different but related fields represent substantial competition for us. Many of our competitors developing oncology drugs have significantly greater capital resources, larger research and development staffs and facilities and greater experience in drug development, regulation, manufacturing and marketing than we do. These organizations also compete with us and our service providers, to recruit qualified personnel, and with us to attract partners for joint ventures and to license technologies that are competitive with us. As a result, our competitors may be able to more easily develop technologies and products that would render our technologies or our drug candidates obsolete ornon-competitive.

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We rely on third parties to conduct our clinical trials and pre-clinical studies. If those parties do not successfully carry out their contractual duties or meet expected deadlines, our drug candidates may not advance in a timely manner or at all.

In the course of ourpre-clinical testing and clinical trials, we rely on third parties, including laboratories, investigators, clinical contract research organizations (“CROs”), and manufacturers, to perform critical services for us. For example, we rely on third parties to conduct our clinical trials and many of ourpre-clinical studies, which are required to be conducted consistent with regulations on Good Laboratory Practice (“GLP”). CROs and study sites are responsible for many aspects of the trials, including finding and enrolling subjects for testing and administering the trials. Although we rely on these third parties to conduct our pre-clinical and clinical trials, we are responsible for ensuring that each of our trials is conducted in accordance with its investigational plan and protocol and that the integrity of the studies and resulting data is protected. Moreover, the FDA and foreign regulatory authorities require us to comply with regulations and standards, commonly referred to as Good Clinical Practices (“GCPs”), for conducting, monitoring, recording, and reporting the results of clinical trials to ensure that the data and results are scientifically credible and accurate, and that the trial subjects are adequately informed of the potential risks of participating in clinical trials. Our reliance on third parties does not relieve us of these responsibilities and requirements. These third parties may not be available when we need them or, if they are available, may not comply with all regulatory and contractual requirements or may not otherwise perform their services in a timely or acceptable manner, and we may need to enter into new arrangements with alternative third parties and our clinical trials may be extended, delayed or terminated. These independent third parties may also have relationships with other commercial entities, some of which may compete with us. In addition, if such third parties fail to perform their obligations in compliance with our protocols or the applicable regulatory requirements, our trials may not meet regulatory requirements or may need to be repeated, we may not receive marketing approvals, or we or such third parties may face regulatory enforcement. As a result of our dependence on third parties, we may face delays, failures or cost increases outside of our direct control. These risks also apply to the development activities of collaborators, and we do not control their research and development, clinical trial or regulatory activities.

We will depend on third party suppliers and contract manufacturers for the manufacturing of our drug candidates and have no direct control over the cost of manufacturing our drug candidates. Increases in the cost of manufacturing our drug candidates would increase our costs of conducting clinical trials and could adversely affect our future profitability.

We do not intend to manufacture our drug candidates ourselves, and we will rely on third parties for our drug supplies both for clinical trials and for commercial quantities in the future. We have taken the strategic decision not to manufacture active pharmaceutical ingredients (“API”) for our drug candidates, as these can be more economically supplied by third parties with particular expertise in this area. We have identified contract facilities that are registered with the FDA, have a track record of large scale API manufacture, and have already invested in capital and equipment. We have no direct control over the manufacturing of our drug candidates, or the cost thereof. If the contract manufacturers are unable to produce sufficient quantities of our drug candidates, as a result of a lack of available materials or otherwise, our ability to complete product candidate development and our future profitability would be adversely affected. If the cost of manufacturing increases, or if the cost of the materials used increases, these costs will be passed on to us, making the cost of conducting clinical trials more expensive. Increases in manufacturing costs could adversely affect our future profitability if we are unable to pass all of the increased costs along to our customers.

Further, we, along with our contract manufacturers, are required to comply with FDA requirements for cGMPs, related to product testing, quality assurance, manufacturing and documentation. Our contract manufacturers may not be able to comply with the applicable FDA regulatory requirements, which could result in delays to our product development programs, could result in adverse regulatory actions against them or us, and could prevent us from ultimately receiving product marketing approval. They also generally must pass an FDA preapproval inspection for conformity with cGMPs before we can obtain approval to manufacture our drug candidates and will be subject to ongoing, periodic, unannounced inspection by the FDA and corresponding state agencies to ensure strict compliance with cGMP, and other applicable government regulations and corresponding foreign standards. If we and our contract manufacturers fail to achieve and maintain high manufacturing standards in compliance with cGMP, we may experience manufacturing errors resulting in defective products that could be harmful to patients, product recalls or withdrawals, delays or interruptions of production or failures in product testing or delivery, delay or prevention of filing or approval of marketing applications for our products, cost overruns or other problems that could seriously harm our business. Not complying with FDA requirements could result in a product recall, or prevent commercialization of our drug candidates and delay our business development activities. In addition, such failure could be the basis for the FDA to issue a warning or untitled letter or take other regulatory or legal enforcement action, including recall or seizure, total or partial suspension of production, suspension of ongoing clinical trials, refusal to approve pending applications or supplemental applications, and potentially civil and/or criminal penalties depending on the matter.

Our business strategy may include entry into additional collaborative or license agreements. We may not be able to enter into collaborative or license agreements or may not be able to negotiate commercially acceptable terms for these agreements.

Our current business strategy may include the entry into additional collaborative or license agreements for the development and commercialization of our drug and drug candidates. The negotiation and consummation of these types of agreements typically involve simultaneous discussions with multiple potential collaborators or licensees and require significant time and resources. In addition, in attracting the attention of pharmaceutical and biotechnology company collaborators or licensees, we compete with numerous other third parties with product opportunities as well as the collaborators’ or licensees’ own internal product opportunities. We may not be able to consummate collaborative or license agreements, or we may not be able to negotiate commercially acceptable terms for these agreements.

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If we do enter into such arrangements, we could be dependent upon the subsequent success of these other parties in performing their respective responsibilities and the cooperation of our partners. Our collaborators may not cooperate with us or perform their obligations under our agreements with them. We cannot control the amount and timing of our collaborators’ resources that will be devoted to researching our product candidates pursuant to our collaborative agreements with them. Our collaborators may choose to pursue existing or alternative technologies in preference to those being developed in collaboration with us.

Under agreements with any collaborators or licensees we may work with in the future, we may rely significantly on them to, among other activities:

• fund research and development activities with us;

• pay us fees upon the achievement of milestones; and

• market for or with us any commercial products that result from our collaborations.

If we do not consummate collaborative or license agreements, we may use our financial resources more rapidly on our drug development efforts, continue to defer certain development activities or forego the exploitation of certain geographic territories, any of which could have a material adverse effect on our business prospects. Further, we may not be successful in overseeing any such collaborative arrangements. If we fail to establish and maintain necessary collaborative or license relationships, our business prospects could suffer.

We rely on acquisitions or licenses from third parties to expand our pipeline of drug candidates.

We are not presently engaged in drug discovery activities. In order to expand our pipeline of drug candidates for future development, we may need to purchase orin-license any such drug candidates. The success of this strategy depends in large part on the combination of our regulatory and development capabilities and expertise and our ability to identify, select and acquire orin-license clinically-enabled product candidates on terms that are acceptable to us. Identifying, selecting and acquiring orin-licensing promising product candidates requires substantial technical expertise, and we have limited experience in identifying and integrating any acquired product candidates into our current infrastructure. Efforts to do so may not result in the actual acquisition orin-license of a particular drug candidate, potentially resulting in a diversion of our management’s time and the expenditure of our resources with no resulting benefit. If we are unable to identify, select and acquire or license suitable product candidates from third parties on terms acceptable to us, our business and prospects may be limited.

We face a risk of product liability claims and claims may exceed our insurance limits.

Our business exposes us to the risk of product liability claims. This risk is inherent in the manufacturing, testing and marketing of human therapeutic products. Our product liability insurance coverage is subject to deductibles and coverage limitations. We may not be able to obtain or maintain adequate protection against potential liabilities, or claims may exceed our insurance limits. If we cannot or do not sufficiently insure against potential product liability claims, we may be exposed to significant liabilities, which may materially and adversely affect our business development and commercialization efforts.

Our efforts will be seriously jeopardized if we are unable to retain and attract key employees.

Our success depends on the continued contributions of our principal management, development and scientific personnel. We face competition for such personnel, and we believe that risks and uncertainties related to our business, including the timing and risk associated with research and development, our available and anticipated cash resources, and the volatility of our stock price, may impact our ability to hire and retain key and other personnel. The loss of services of our Chief Executive Officer or other key employees could adversely impact our operations and ability to generate or raise additional capital.

Negative U.S. and global economic conditions may pose challenges to our business strategy, which relies on funding from the financial markets or collaborators.

Negative conditions in the U.S. or global economy, including financial markets, may adversely affect our business and the business of current and prospective vendors, licensees and collaborators, and others with whom we do or may conduct business. The duration and severity of these conditions is uncertain. If negative economic conditions occur, we may be unable to secure funding on terms satisfactory to us to sustain our operations or to find suitable collaborators to advance our internal programs, even if we achieve positive results from our drug development programs.

Laws, rules and regulations relating to public companies may be costly and impact our ability to attract and retain directors and executive officers.

Laws and regulations affecting public companies, including rules adopted by the Securities and Exchange Commission (“SEC”) and by the National Association of Securities Dealers Automated Quotations (“NASDAQ”), may result in increased costs to us. These laws, rules and regulations could make it more difficult or costly for us to obtain certain types of insurance, including director and officer liability insurance, and we may be forced to accept reduced policy limits and coverage or incur substantially higher costs to obtain the same or similar coverage. The impact of these events could also make it more difficult for us to attract and retain qualified persons to serve on our board of directors, on our board committees or as executive officers. We cannot estimate accurately the amount or timing of additional costs we may incur to respond to these laws, rules and regulations.

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If we fail to establish and maintain proper and effective internal controls, our ability to produce accurate financial statements on a timely basis could be impaired, which would adversely affect our operating results, our ability to operate our business, and our stock price, and could result in litigation or similar actions.

Ensuring that we have adequate internal financial and accounting controls and procedures in place to produce accurate financial statements on a timely basis is a costly and time-consuming effort that needs to bere-evaluated frequently. Failure on our part to have effective internal financial and accounting controls would cause our financial reporting to be unreliable, could have a material adverse effect on our business, operating results, and financial condition, and could cause the trading price of our common stock to fall dramatically. Our management is responsible for establishing and maintaining adequate internal control over financial reporting to provide reasonable assurance regarding the reliability of our financial reporting and the preparation of financial statements for external purposes in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). A control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the control system’s objectives will be met. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that misstatements due to error or fraud will not occur or that all control issues and instances of fraud, if any, within the company will be detected.

We cannot be certain that the actions we have taken to ensure we have adequate internal controls over financial reporting will be sufficient. In future periods, if the process required by Section 404 of the Sarbanes-Oxley Act reveals any material weaknesses or significant deficiencies, the correction of any such material weaknesses or significant deficiencies could require remedial measures which could be costly and time-consuming. In addition, in such a case, we may be unable to produce accurate financial statements on a timely basis. Any associated accounting restatement could create a significant strain on our internal resources and cause delays in our release of quarterly or annual financial results and the filing of related reports, increase our costs and cause management distraction. Any of the foregoing could cause investors to lose confidence in the reliability of our financial statements, which could cause the market price of our common stock to decline and make it more difficult for us to finance our operations and growth.

Security breaches and other disruptions could compromise our information and expose us to liability, which would cause our business and reputation to suffer.

In the ordinary course of our business, we collect and store sensitive data, including intellectual property, our proprietary business information and that of our suppliers, as well as personally identifiable information of clinical trial participants and employees. Similarly, our third-party providers possess certain of our sensitive protected health data. The secure maintenance of this information is critical to our operations and business strategy. Despite our security measures, our information technology and infrastructure may be vulnerable to attacks by hackers or breached due to employee error, malfeasance or other disruptions. Attacks of this nature are increasing in their frequency, levels of persistence, sophistication and intensity, and are being conducted by sophisticated and organized groups and individuals with a wide range of motives and expertise. Although we develop and maintain systems and controls designed to prevent these events from occurring, and we have a process to identify and mitigate threats, the development and maintenance of these systems, controls and processes is costly and requires ongoing monitoring and updating as technologies change and efforts to overcome security measures become more sophisticated, and such systems, controls and processes may not be successful in preventing a breach. Any such breach could compromise our networks and the information stored there could be accessed, publicly disclosed, lost or stolen. We could be required to expend significant amounts of money and other resources to repair or replace information systems or networks. In addition, our liability insurance may not be sufficient in type or amount to cover us against claims related to security breaches, cyberattacks and other related breaches.

The legislative and regulatory landscape for privacy and data protection continues to evolve, and there has been an increasing amount of focus on privacy and data protection issues with the potential to affect our business, including compliance with the Health Insurance Portability and Accountability Act of 1996 and recently enacted laws in a majority of states requiring security breach notification. The collection and use of personal health data of individuals in the European Union is also governed by strict data protection laws. In addition to existing laws, since May 25, 2018, the General Data Protection Regulation (“GDPR”) has imposed new obligations with respect to European Union data and substantial fines for breaches of the data protection rules. It will increase our responsibility and potential liability in relation to personal data that we process, and we will be required to put in place additional mechanisms ensuring compliance with the new European Union data protection rules. There is significant uncertainty related to the manner in which data protection authorities will seek to enforce compliance with GDPR. For example, it is not clear if the authorities will conduct random audits of companies doing business in the European Union, or if the authorities will wait for complaints to be filed by individuals who claim their rights have been violated. Enforcement uncertainty and the costs associated with ensuring GDPR compliance may be onerous and adversely affect our business, operating results, prospects and financial condition.

Additionally, California recently enacted legislation that has been dubbed the first “GDPR-like” law in the United States. Known as the California Consumer Privacy Act (“CCPA”), it creates new individual privacy rights for consumers (as that word is broadly defined in the law) and places increased privacy and security obligations on entities handling personal data of consumers or households. When it goes into effect on January 1, 2020, the CCPA will require covered companies to provide new disclosures to California consumers, provide such consumers new ways toopt-out of certain sales of personal information, and allow for a new cause of action for data breaches. The CCPA may significantly impact our business activities and require substantial compliance costs that adversely affect business, operating results, prospects and financial condition.

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Thus, any access, disclosure or other loss of information, including our data being breached at our partners or third-party providers, could result in legal claims or proceedings and liability under laws that protect the privacy of personal information, disrupt our operations and damage our reputation, which could adversely affect our business.

If we fail to comply with environmental, health and safety laws and regulations, we could become subject to fines or penalties or incur costs that could harm our business.

We are subject to numerous environmental, health and safety laws and regulations, including those governing laboratory procedures and the handling, use, storage, treatment and disposal of hazardous materials and wastes. From time to time and in the future, our operations may involve the use of hazardous and flammable materials, including chemicals and biological materials, and may also produce hazardous waste. Even if we contract with third parties for the disposal of these materials and waste, we cannot completely eliminate the risk of contamination or injury resulting from these materials. In the event of contamination or injury resulting from the use or disposal of our hazardous materials, we could be held liable for any resulting damages, and any liability could exceed our resources. We also could incur significant costs associated with civil or criminal fines and penalties for failure to comply with such laws and regulations.

We maintain workers’ compensation insurance to cover us for costs and expenses we may incur due to injuries to our employees resulting from the use of hazardous materials, but this insurance may not provide adequate coverage against potential liabilities. However, we do not maintain insurance for environmental liability or toxic tort claims that may be asserted against us.

In addition, we may incur substantial costs in order to comply with current or future environmental, health and safety laws and regulations. Current or future environmental laws and regulations may impair our research, development or production efforts. In addition, failure to comply with these laws and regulations may result in substantial fines, penalties or other sanctions.

Limitations on the deductibility of net operating losses could adversely affect our business and financial condition.

We have a history of net operating losses. As a result of the Tax Cuts and Jobs Act of 2017, the deduction of net operating losses is limited to 80% of current year taxable income. The limitations on the net operating loss deduction, as well other changes in tax policy, may subject us to additional taxation, adversely affecting our results of operations and financial condition.

Risks Relating to Our Intellectual Property

Our commercial success is dependent, in part, on obtaining and maintaining patent protection and preserving trade secrets, which cannot be guaranteed.

Patent protection and trade secret protection are important to our business and our future will depend, in part on our ability to maintain trade secret protection, obtain patents and operate without infringing the proprietary rights of others both in the United States and abroad. Litigation or other legal proceedings may be necessary to defend against claims of infringement, to enforce our patents or to protect our trade secrets. Such litigation could result in substantial costs and diversion of our management’s attention.

The patent positions of pharmaceutical and biotechnology companies can be highly uncertain and involve complex legal and factual questions. In August 2012, we acquired patents and patent applications related to pracinostat from S*Bio. In September 2013, we acquired patents and patent applications related toME-401 from Pathway Therapeutics, Inc. In September 2017, we acquired patents and patent applications related to voruciclib from Presage. In 2011 we acquired both issued patents and pending patent applications related toME-344 from Novogen in relation to our Isoflavone-based compounds, which we previously licensed from Novogen. Additionally, Novogen had previously applied for patents in a number of countries with respect to the use of their isoflavone compounds, includingME-344. The patent applications may not proceed to grant or may be amended to reduce the scope of protection of any patent granted. The applications and patents may also be opposed or challenged by third parties. Our commercial success will depend, in part, on our ability to obtain and maintain effective patent protection for our compounds and their use in treating, preventing, or curing cancer, and to successfully defend patent rights in those technologies against third-party challenges. As patent applications in the United States are maintained in secrecy until published or issued and as publication of discoveries in the scientific or patent literature often lag behind the actual discoveries, we cannot be certain that we or Presage were the first to make the inventions covered by the pending patent applications or issued patents referred to above or that we or they were the first to file patent applications for such inventions. Additionally, the breadth of claims allowed in biotechnology and pharmaceutical patents or their enforceability cannot be predicted. We cannot be sure that, should any patents issue, we will be provided with adequate protection against potentially competitive products. Furthermore, we cannot be sure that should patents issue, they will be of commercial value to us, or that private parties, including competitors, will not successfully challenge our patents or circumvent our patent position in the United States or abroad.

Claims by other companies that we infringe on their proprietary technology may result in liability for damages or stop our development and commercialization efforts.

The pharmaceutical industry is highly competitive, and patents have been applied for by, and issued to, other parties relating to products competitive with the compounds that we have acquired. Therefore, pracinostat,ME-401, voruciclib, andME-344 and any other drug candidates may give rise to claims that they infringe the patents or proprietary rights of other parties existing now and in the future.

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Furthermore, to the extent that we or our consultants or research collaborators use intellectual property owned by others in work performed for us, disputes may also arise as to the rights in such intellectual property or in resultingknow-how and inventions. An adverse claim could subject us to significant liabilities to such other parties and/or require disputed rights to be licensed from such other parties.

We have contracted formulation development and manufacturing process development work for our product candidates. This process has identified a number of excipients, or additives to improve drug delivery, which may be used in the formulations. Excipients, among other things, perform the function of a carrier of the active drug ingredient. Some of these identified excipients or carriers may be included in third party patents in some countries. We intend to seek a license if we decide to use a patented excipient in the marketed product or we may choose one of those excipients that does not have a license requirement.

We cannot be sure that any license required under any such patents or proprietary rights would be made available on terms acceptable to us, if at all. If we do not obtain such licenses, we may encounter delays in product market introductions, or may find that the development, manufacture or sale of products requiring such licenses may be precluded.

We may be subject to claims by third parties asserting that our employees or we have misappropriated their intellectual property, or claiming ownership of what we regard as our own intellectual property.

Many of our employees and the employees of Helsinn and third parties upon which we rely to conduct our clinical trials were previously employed at universities or at other biotechnology or pharmaceutical companies, some of which may be competitors or potential competitors. Some of these employees executed proprietary rights,non-disclosure andnon-competition agreements, or similar agreements, in connection with such previous employment. Although we try to ensure that our employees do not use the proprietary information orknow-how of others in their work for us, we may be subject to claims that we or these employees have used or disclosed intellectual property, including trade secrets or other proprietary information, of any such third party. Litigation may be necessary to defend against such claims. If we fail in defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights or personnel or sustain damages. Such intellectual property rights could be awarded to a third party, and we could be required to obtain a license from such third party to commercialize our technology or products. Such a license may not be available on commercially reasonable terms or at all. Even if we are successful in defending against such claims, litigation could result in substantial costs and be a distraction to management.

In addition, while we typically require our employees, consultants, advisors and collaborators who may be involved in the development of intellectual property to execute agreements assigning such intellectual property to us, we may be unsuccessful in executing such an agreement with each party who in fact develops intellectual property that we regard as our own, which may result in claims by or against us related to the ownership of such intellectual property. If we fail in prosecuting or defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights. Even if we are successful in prosecuting or defending against such claims, litigation could result in substantial costs and be a distraction to our senior management and scientific personnel.

We may be subject to substantial costs stemming from our defense against third-party intellectual property infringement claims.

Third parties may assert that we are using their proprietary information without authorization. Third parties may also have or obtain patents and may claim that technologies licensed to or used by us infringe their patents. If we are required to defend patent infringement actions brought by third parties, or if we sue to protect our own patent rights, we may be required to pay substantial litigation costs and managerial attention may be diverted from business operations even if the outcome is not adverse to us. In addition, any legal action that seeks damages or an injunction to stop us from carrying on our commercial activities relating to the affected technologies could subject us to monetary liability and require us or any third party licensors to obtain a license to continue to use the affected technologies. We cannot predict whether we would prevail in any of these types of actions or that any required license would be made available on commercially acceptable terms or at all.

Risks Related to Securities Markets and Investment in Our Stock

The trading price of the shares of our common stock has been and may continue to be highly volatile and could decline in value and we may incur significant costs from class action litigation.

The trading price of our common stock could be highly volatile in response to various factors, many of which are beyond our control, including, but not limited to, the following:

• failure to successfully develop our drug candidates;

• design, results and timing of clinical trials andpre-clinical studies;

• announcements of technological innovations by us or our competitors;

• new products introduced or announced by us or our competitors;

• changes in financial estimates by securities analysts;

• actual or anticipated variations in operating results;

• expiration or termination of licenses, research contracts or other collaboration agreements;

• conditions or trends in the regulatory climate and the biotechnology, pharmaceutical and genomics industries;

• instability in the stock market as a result of current or future domestic and global events;

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• changes in the market valuations of similar companies;

• the liquidity of any market for our securities; and

• threatened or actual delisting of our common stock from a national stock exchange.

Equity markets in general, and the market for biotechnology and life sciences companies in particular, have experienced substantial price and volume fluctuations that have often been unrelated or disproportionate to the operating performance of companies traded in those markets. In addition, changes in economic conditions in the U.S., the EU or globally, particularly in the context of current global events, could impact upon our ability to grow profitably. Adverse economic changes are outside our control and may result in material adverse impacts on our business or our results of operations. These broad market and industry factors may materially affect the market price of shares of our common stock, regardless of our development and operating performance. In the past, following periods of volatility in the market price of a company’s securities, securities class-action litigation has often been instituted against that company. Such litigation, if instituted against us, could cause us to incur substantial costs and divert management’s attention and resources.

Future sales of our common stock, including common stock issued upon exercise of outstanding warrants or options, may depress the market price of our common stock and cause stockholders to experience dilution.

The market price of our common stock could decline as a result of sales of substantial amounts of our common stock in the public market, including upon exercise of outstanding warrants or stock options, and any subsequent sales of such shares. As of June 30, 2019, we had outstanding warrants issued in our May 2018 private placement exercisable to purchase 16,061,602 shares of common stock at an exercise price of $2.54 per share, which expire in May 2023. We also had outstanding options to purchase 8,356,961 shares of common stock. We may seek additional capital through one or more additional equity transactions in the future; however, such transactions will be subject to market conditions and there can be no assurance any such transactions will be completed. If we sell shares in the future, the prices at which we sell these future shares will vary, and these variations may be significant. Stockholders will experience significant dilution if we sell these future shares at prices significantly below the price at which previous stockholders invested.

Because we do not intend to pay, and have not paid, any cash dividends on our shares of common stock, our stockholders will not be able to receive a return on their shares unless the value of our common stock appreciates and they sell their shares.

We have never paid or declared any cash dividends on our common stock, and we intend to retain any future earnings to finance the development and expansion of our business. We do not anticipate paying any cash dividends on our common stock in the foreseeable future. Therefore, our stockholders will not be able to receive a return on their investment unless the value of our common stock appreciates and they sell their shares.

We will have broad discretion over the use of the net proceeds from any exercise of outstanding warrants and options.

We will have broad discretion to use the net proceeds to us upon any exercise of outstanding warrants and options, and investors in our stock will be relying on the judgment of our board of directors and management regarding the application of these proceeds. Although we expect to use a substantial portion of the net proceeds from any exercise of the warrants and options for general corporate purposes and progression of our clinical trial programs, we have not allocated these net proceeds for specific purposes.

We are authorized to issue blank check preferred stock, which could adversely affect the holders of our common stock.

Our restated certificate of incorporation allows us to issue blank check preferred stock with rights potentially senior to those of our common stock without any further vote or action by the holders of our common stock. The issuance of a class of preferred stock could decrease the amount of earnings and assets available for distribution to the holders of our common stock or could adversely affect the rights and powers, including voting rights, of such holders. In certain circumstances, such issuance could have the effect of decreasing the market price of our shares, or making a change in control of the Company more difficult.

Our executive officers and directors may sell shares of their stock, and these sales could adversely affect our stock price.

Sales of our stock by our executive officers and directors, or the perception that such sales may occur, could adversely affect the market price of our stock. Our executive officers and directors may sell stock in the future, either as part, or outside, of trading plans under Rule10b5-1 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”).

Item 1B. Unresolved Staff Comments

None.

Item 2. Properties

We have leased approximately 20,800 square feet of office space, located at 3611 Valley Centre Drive, San Diego, California 92130. The location houses our executive and administrative offices. The lease commenced in July 2017 and expires in May 2020. The monthly rental rate is approximately $67,000 per month over the remaining term of the lease, plus a pro rata share of certain building expenses.

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Item 3. Legal Proceedings

None.

Item 4. Mine Safety Disclosures

Not applicable.

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PART II

Item 5. Market for the Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Our common stock is listed on the NASDAQ Capital Market under the symbol “MEIP”.

Holders

As of August 26, 2019, there were 73,634,927 shares of our common stock outstanding and 815 holders of record of our common stock. This number was derived from our stockholder records and does not include beneficial owners of our common stock whose shares are held in the name of various dealers, clearing agencies, banks, brokers and other fiduciaries.

For a discussion of outstanding warrants and other securities exercisable for or convertible into shares of our common stock, see Notes 7 and 8 under Item 8 in this Annual Report.

Dividends

We have never declared or paid any cash dividends on our common stock and do not anticipate paying any cash dividends in the foreseeable future. We currently intend to retain all available funds and future earnings, if any, to support operations and finance the growth and development of our business. Any future determination related to our dividend policy will be made at the discretion of our board of directors.

Securities authorized for issuance under equity compensation plans

The table below shows, as of June 30, 2019, information for equity compensation plans previously approved by stockholders and for compensation plans not previously approved by stockholders.

Plan Category	Number of securities to be issued upon exercise of outstanding options, warrants and rights (a)		Weighted-average exercise price of outstanding options, warrants and rights (b)		Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a)) (c)
Equity compensation plans approved by security holders (1)		8,356,961	$	3.20		9,486,844
Equity compensation plans not approved by security holders		—		—		—
Total		8,356,961	$	3.20		9,486,844

(1) Consists of 8,356,961 shares of common stock issuable upon exercise of options granted under the MEI Pharma, Inc. Amended and Restated 2008 Stock Omnibus Equity Compensation Plan (“the Plan”), under which 19,089,794 shares of common stock are authorized for issuance. The Plan provides for the grant of options and/or other stock-based or stock-denominated awards to ournon-employee directors, officers, employees and advisors. The weighted-average exercise price presented is the weighted-average exercise price of vested and unvested options. 

Performance graph

The graph below compares the cumulative five-year total return on our common stock from July 1, 2014, through June 30, 2019, to the cumulative total return over such period for (i) the NASDAQ Composite Index and (ii) the NASDAQ Biotechnology Index. The graph assumes the investment of $100 on July 1, 2014, with the reinvestment of dividends, although dividends have not been declared on our common stock, and is calculated according to the SEC’s methodology. We caution that the stock price performance shown in the graph may not be indicative of future stock price performance. The graph, including each of the graph lines, was provided by Zacks Investment Research, Inc.

This information, including the graph below, is not deemed to be “soliciting material” or to be “filed” with the SEC, or subject to the SEC’s proxy rules, other than as provided in such rules, or to the liabilities of Section 18 of the Exchange Act, and shall not be deemed incorporated by reference into any prior or subsequent filing by us under the Securities Act of 1933, as amended (the “Securities Act”) or the Exchange Act, except to the extent that we specifically incorporate it by reference into any such filing.

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COMPARISON OF FIVE-YEAR CUMULATIVE TOTAL RETURN

Item 6. Selected Financial Data

The following Selected Financial Data should be read in conjunction with “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Item 8. Financial Statements and Supplementary Data” included below in this Annual Report. The following table presents our selected historical condensed financial data. The condensed statements of operations data for fiscal years ended June 30, 2019, 2018 and 2017 and the condensed balance sheet data as of June 30, 2019 and 2018 are derived from our audited financial statements included elsewhere in this Annual Report. The condensed statements of operations data for the fiscal years ended June 30, 2016 and 2015 and the condensed balance sheet data as of June 30, 2017, 2016 and 2015 are derived from our audited financial statements that are not included in this Annual Report.

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	Years Ended June 30,
	2019			2018			2017			2016			2015
	(In thousands, except per share data)
Statement of Operations Data:
Revenue	$	4,915		$	1,622		$	23,249		$	—		$	—
Operating expenses:
Cost of revenue		4,263			3,383			5,000			—			—
Research and development		32,300			17,038			7,237			13,403			23,823
General and administrative		14,597			9,787			8,628			7,601			8,948
Total operating expenses		51,160			30,208			20,865			21,004			32,771
(Loss) income from operations		(46,245	)		(28,586	)		2,384			(21,004	)		(32,771	)
Change in fair value of warrant liability		27,632			(9,705	)		—			—			—
Financing costs associated with warrants		—			(2,367	)		—			—			—
Other income and expense, net		1,794			590			286			142			77
Net (loss) income	$	(16,819	)	$	(40,068	)	$	2,670		$	(20,862	)	$	(32,694	)
Net (loss) income:
Basic	$	(16,819	)	$	(40,068	)	$	2,670		$	(20,862	)	$	(32,694	)
Diluted	$	(54,613	)	$	(40,068	)	$	2,670		$	(20,862	)	$	(32,694	)
Net (loss) income per share
Basic	$	(0.24	)	$	(0.97	)	$	0.07		$	(0.61	)	$	(1.16	)
Diluted	$	(0.75	)	$	(0.97	)	$	0.07		$	(0.61	)	$	(1.16	)
Shares used to calculate net (loss) income per share
Basic		71,139			41,431			36,813			34,400			28,204
Diluted		72,385			41,431			36,938			34,400			28,204
	As of June 30,
	2019			2018			2017			2016			2015
	(In thousands)
Balance Sheet Data:
Cash, cash equivalents, short-term investments, and common stock proceeds receivable	$	79,763		$	102,743		$	53,565		$	45,918		$	63,779
Total assets	$	82,663		$	104,657		$	55,704		$	47,164		$	64,750
Warrant liability	$	17,613		$	46,313		$	—		$	—		$	—
Total liabilities	$	34,733		$	54,198		$	4,866		$	5,512		$	4,959
Accumulated deficit	$	(231,218	)	$	(214,399	)	$	(174,331	)	$	(177,001	)	$	(156,139	)
Total stockholders’ equity	$	47,930		$	50,459		$	50,838		$	41,652		$	59,791

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The following discussion and analysis should be read in conjunction with “Item 8. Financial Statements and Supplementary Data” included below in this Annual Report. Operating results are not necessarily indicative of results that may occur in future periods.

This discussion and analysis contains forward-looking statements that involve a number of risks, uncertainties and assumptions. Actual results may differ materially from those anticipated in the forward-looking statements as a result of many factors including, but not limited to, those set forth under “Cautionary Statement About Forward-Looking Statements” and “Risk Factors” in Item 1A. included above in this Annual Report. All forward-looking statements included in this Annual Report are based on the information available to us as of the time we file this Annual Report, and except as required by law, we undertake no obligation to update publicly or revise any forward-looking statements.

Overview

We are a late-stage pharmaceutical company focused on leveraging our extensive development and oncology expertise to identify and advance new therapies intended to meaningfully improve the treatment of cancer. Our portfolio of drug candidates contains four clinical-stage candidates, including one candidate in an ongoing Phase 3 global registration trial and another candidate in an ongoing Phase 2 clinical trial to support an accelerated approval of a marketing application with the FDA under 21 CFR Part 314.500. Our common stock is listed on the NASDAQ Capital Market under the symbol “MEIP”.

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Clinical Development Programs

Our approach to building our pipeline is to license promising cancer agents and build value in programs through development, commercialization and strategic partnerships, as appropriate. Our drug candidate pipeline includes:

• ME-401, an oral PI3K delta inhibitor;

• Voruciclib, an oral CDK inhibitor;

• ME-344, a mitochondrial inhibitor targeting the OXPHOS complex; and

• Pracinostat, an oral HDAC inhibitor.

Recent Developments

In October 2018, we entered into a license agreement with KKC forME-401 (“the KKC License Agreement”). Under the terms of the KKC License Agreement, KKC was granted the exclusive right to develop and commercializeME-401 in Japan. We also granted KKC the right to purchase supply ofME-401 for commercial requirements at cost plus apre-negotiated percentage, as well as manufacturing rights in Japan. In return, we received an upfront payment of $10.0 million and are also eligible to receive up to $87.5 million in additional development and commercialization milestones, as well as royalties on net sales ofME-401 in Japan extending into themid-teens. The KKC License Agreement expires at the end of the royalty term, that is, upon the last to occur of (a) expiration of our patents in Japan, (b) expiration of regulatory exclusivity forME-401 in Japan or (c) 10 years from the first commercial sale ofME-401 in Japan.

In October 2018, we entered into a clinical collaboration with BeiGene to evaluate the safety and efficacy ofME-401 in combination with BeiGene’s zanubrutinib, an investigational inhibitor of Bruton’s tyrosine kinase (“BTK”), for the treatment of patients withB-cell malignancies. Under the terms of the clinical collaboration agreement, we amended our ongoing Phase 1b trial to include evaluation ofME-401 in combination with zanubrutinib in patients withB-cell malignancies. Study costs are being shared equally by the parties, and we agreed to supplyME-401 and BeiGene agreed to supply zanubrutinib. We record the costs reimbursed by BeiGene as a reduction of our research and development expenses. We retained full commercial rights forME-401 and BeiGene retained full commercial rights for zanubrutinib.

For a more complete discussion of our business, see the section of this Annual Report “Item1- Business” above.

Equity Transactions

Shelf Registration Statement

We have a shelf registration statement that permits us to sell, from time to time, up to $150.0 million of common stock, preferred stock and warrants. In November 2017, we entered into anAt-The-Market Equity Offering Sales Agreement (the “ATM Sales Agreement”), pursuant to which we may sell an aggregate of up to $30.0 million of our common stock pursuant to the shelf registration statement. During the year ended June 30, 2019, we sold 2,214,658 shares under the ATM Sales Agreement for net proceeds of $5.4 million; $5.2 million of these proceeds were received in July 2019 and are recorded as common stock proceeds receivable as of June 30, 2019. As of June 30, 2019, there is $144.4 million aggregate value of securities available under the shelf registration statement.

May 2018 Private Placement

In May 2018, we sold 33,003,296 shares of our common stock, together with warrants to purchase 16,501,645 shares of common stock, in a private offering for approximately $70.2 million, after deducting offering costs.

Helsinn Equity Investment

In August 2016, we entered into a Common Stock Purchase Agreement with Helsinn Investment Fund SA (the “Helsinn Equity Agreement”). Pursuant to the terms of the Helsinn Equity Agreement, we issued 2,616,431 shares of common stock on August 16, 2016 in exchange for a $5.0 million investment. The transaction was exempt from registration pursuant to Section 4(a)(2) of the Securities Act.

Critical Accounting Policies and Management Estimates

Management’s discussion and analysis of our financial condition and results of operations is based on our financial statements, which have been prepared in accordance with U.S. GAAP. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, expenses and related disclosures. Actual results could differ from those estimates. We believe the following accounting policies to be critical to the judgments and estimates used in the preparation of our financial statements.

Revenue Recognition

Beginning July 1, 2018, we recognize revenue when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. For enforceable contracts with our customers, we first identify the distinct performance obligations – or accounting units – within the contract. Performance obligations are commitments in a contract to transfer a distinct good or service to the customer.

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Payments received under commercial arrangements, such as licensing technology rights, may includenon-refundable fees at the inception of the arrangements, milestone payments for specific achievements designated in the agreements, and royalties on the sale of products. At the inception of arrangements that include milestone payments, we use judgment to evaluate whether the milestones are probable of being achieved and we estimate the amount to include in the transaction price using the most likely method. If it is probable that a significant revenue reversal will not occur, the estimated amount is included in the transaction price. Milestone payments that are not within our or the licensee’s control, such as regulatory approvals, are not included in the transaction price until those approvals are received. At the end of each reporting period, were-evaluate the probability of achievement of development milestones and any related constraint and, as necessary, we adjust our estimate of the overall transaction price. Any adjustments are recorded on a cumulativecatch-up basis, which would affect revenues and earnings in the period of adjustment. To date, we have not recognized any material cumulativecatch-up adjustments from changes in our estimate of the transaction price.

We develop estimates of the stand-alone selling price for each distinct performance obligation and allocate the overall transaction price to each accounting unit based on a relative stand-alone selling price approach. We develop assumptions that require judgment to determine the stand-alone selling price for license-related performance obligations, which may include forecasted revenues, development timelines, reimbursement rates for personnel costs, discount rates and probabilities of technical, regulatory and commercial success. We estimate stand-alone selling price for research and development performance obligations by forecasting the expected costs of satisfying a performance obligation plus an appropriate margin.

In the case of a license that is a distinct performance obligation, we recognize revenue fromnon-refundable,up-front fees at the point in time when the license is transferred to the licensee and the licensee can use and benefit from the license. For licenses that are bundled with other obligations, we use judgment to assess the nature of the combined performance obligation to determine whether the combined performance obligation is satisfied over time or at a point in time and, if over time, the appropriate method of measuring progress for purposes of recognizing revenue. If the performance obligation is satisfied over time, we evaluate the measure of progress each reporting period and, if necessary, adjust the measure of performance and related revenue recognition.

The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services to be provided. Revenue is recorded proportionally as costs are incurred. We generally use thecost-to-cost measure of progress because it best depicts the transfer of control to the customer which occurs as we incur costs. Under thecost-to-cost measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation (an “input method” under Topic 606). We use judgment to estimate the total cost expected to complete the research and development performance obligations, which include subcontractors’ costs, labor, materials, other direct costs and an allocation of indirect costs. We evaluate these cost estimates and the progress each reporting period and, as necessary, we adjust the measure of progress and related revenue recognition. To date, we have not recognized any material cumulativecatch-up adjustments from changes in our estimate of the measure of progress.

For arrangements that include sales-based or usage-based royalties, we recognize revenue at the later of (i) when the related sales occur or (ii) when the performance obligation to which some or all of the royalty has been allocated has been satisfied or partially satisfied. To date, we have not recognized any royalty revenue from license agreements.

The timing of revenue recognition, invoicing and cash collections results in billed accounts receivable and unbilled receivables (contract assets), which are classified as “prepaid expenses and other current assets” on our Balance Sheet, and deferred revenue (contract liabilities). We invoice our customers in accordance with agreed-upon contractual terms, typically at periodic intervals or upon achievement of contractual milestones. Invoicing may occur subsequent to revenue recognition, resulting in contract assets. We may receive advance payments from our customers before revenue is recognized, resulting in contract liabilities. The contract assets and liabilities reported on the Balance Sheet relate to the KKC License Agreement and Helsinn License Agreement.

Cost of Revenue

Cost of revenue primarily includes external costs paid to third-party contractors to perform research, conduct clinical trials and develop and manufacture drug materials, and internal compensation and related personnel expenses to support our research and development performance obligations associated with the Helsinn License Agreement.

Research and Development Costs

Research and development costs are expensed as incurred and include costs paid to third-party contractors to perform research, conduct clinical trials and develop and manufacture drug materials. Clinical trial costs, including costs associated with third-party contractors, are a significant component of research and development expenses. We expense research and development costs based on work performed. In determining the amount to expense, management relies on estimates of total costs based on contract components completed, the enrollment of subjects, the completion of trials, and other events. Costs incurred related to the purchase or licensing ofin-process research and development for early-stage products or products that are not commercially viable and ready for use, or have no alternative future use, are charged to expense in the period incurred.

Share-Based Compensation

Share-based compensation expense for employees and directors is recognized in the Statement of Operations based on estimated amounts, including the grant date fair value and the expected service period. For stock options, we estimate the grant date fair value using a Black-Scholes valuation model, which requires the use of multiple subjective inputs including estimated future volatility, expected forfeitures and the expected term of the awards. We estimate the expected future volatility based on the stock’s

30

historical price volatility. The stock’s future volatility may differ from the estimated volatility at the grant date. For restricted stock unit (“RSU”) equity awards, we estimate the grant date fair value using our closing stock price on the date of grant. We recognize the effect of forfeitures in compensation expense when the forfeitures occur. The estimated forfeiture rates may differ from actual forfeiture rates which would affect the amount of expense recognized during the period. We recognize the value of the awards over the awards’ requisite service or performance periods. The requisite service period is generally the time over which our share-based awards vest.

Warrant Liability

In May 2018, we issued warrants in connection with the May 2018 Private Placement. Pursuant to the terms of the warrants, we could be required to settle the warrants in cash in the event of an acquisition of the Company and, as a result, the warrants are required to be measured at fair value and reported as a liability in the balance sheet. We recorded the fair value of the warrants upon issuance using the Black-Scholes valuation model, and are required to revalue the warrants at each reporting date with any changes in fair value recorded on our statement of operations. Inputs used to determine estimated fair value of the warrant liabilities include the estimated fair value of the underlying stock at the valuation date, the estimated term of the warrants, risk-free interest rates, expected dividends and the expected volatility of the underlying stock.

Income Taxes

Our income tax expense consists of current and deferred income tax expense or benefit. Current income tax expense or benefit is the amount of income taxes expected to be payable or refundable for the current year. A deferred income tax asset or liability is recognized for the future tax consequences attributable to tax credits and loss carryforwards and to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized. As of June 30, 2019 and 2018, we have established a valuation allowance to fully reserve our net deferred tax assets. Changes in our ownership may limit the amount of net operating loss carryforwards that can be utilized in the future to offset taxable income.

The Financial Accounting Standards Board (“FASB”) Topic on Income Taxes prescribes a recognition threshold and measurement attribute criteria for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must bemore-likely-than-not to be sustained upon examination by taxing authorities. An uncertain income tax position will not be recognized if it has less than a 50% likelihood of being sustained. There were no unrecognized tax benefits as of June 30, 2019 and 2018.

Results of Operations

Comparison of Years Ended June 30, 2019 and 2018

We had a loss from operations of $46.2 million for the year ended June 30, 2019 compared to a loss from operations of $28.6 million for the year ended June 30, 2018.

Revenue:We recognized revenue of $4.9 million for the year ended June 30, 2019 compared to $1.6 million for the year ended June 30, 2018. Revenue increased primarily due to our license agreement with KKC and resulted from the transfer of the license, the partial satisfaction of our research and development obligations and providing clinical trial materials. Revenue related to the license agreement with KKC was $2.5 million for the year ended June 30, 2019. There was no revenue related to the license agreement with KKC for the year ended June 30, 2018. Revenue also includes recognition of fees allocated to performance obligations in accordance with the Helsinn License Agreement. Revenue related the Helsinn License Agreement was $2.4 million for the year ended June 30, 2019 compared to $1.6 million for the year ended June 30, 2018.

Cost of Revenue: We recognized cost of revenue of $4.3 million for the year ended June 30, 2019 compared to $3.4 million for the year ended June 30, 2018. The cost of revenue includes external costs paid to third-party contractors to perform research, conduct clinical trials and develop and manufacture drug materials, and internal compensation and related personnel expenses associated with pracinostat. Costs of revenue relate to expenses for pracinostat incurred in connection with our development activities in accordance with the Helsinn License Agreement, including both Helsinn’s share and our share of costs related to the POC study, which we are responsible for conducting.

Research and Development: The following is a summary of our research and development expenses to supplement the more detailed discussion below. The dollar values in the following table are in thousands.

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	Years Ended June 30,
Research and development expenses	2019		2018
ME-401	$	17,515	$	5,766
Voruciclib		3,120		4,121
ME-344		455		685
Pracinostat		17		22
Other		11,193		6,444
Total research and development expenses	$	32,300	$	17,038

Research and development expenses consist primarily of clinical trial costs (including payments to CROs),pre-clinical study costs, and costs to manufacture our drug candidates fornon-clinical and clinical studies. Other research and development expenses consist primarily of salaries and personnel costs, share-based compensation, legal costs, and other costs not allocated to specific drug programs. Research and development expenses were $32.3 million for the year ended June 30, 2019 compared to $17.0 million for the year ended June 30, 2018. Costs related toME-401 were higher for the year ended June 30, 2019 due to $7.1 million of increased clinical trial costs primarily as a result of starting the Phase 2 study and $4.6 million of associated drug manufacturing costs. Costs related to voruciclib decreased for the year ended June 30, 2019 compared with the year ended June 30, 2018, related to a license fee payment of $2.9 million made in the prior period, partially offset by increased clinical trial costs. Other research and development costs increased for the year ended June 30, 2019 due to higher levels of salaries ($1.8 million) and share-based compensation ($1.1 million) associated with increased headcount to support our clinical activities, as well as to increased legal and consulting fees ($1.3 million).

General and Administrative:General and administrative expenses increased by $4.8 million to $14.6 million for the year ended June 30, 2019 compared to $9.8 million for the year ended June 30, 2018. The increase is primarily due to $3.3 million in increased salaries and share-based compensation associated with increased headcount to support our activities and $0.9 million in increased professional services and legal expenses during the year ended June 30, 2019.

Other income or expense:We recorded anon-cash gain of $27.6 million during the year ended June 30, 2019 due to a change in the fair value of our warrant liability for warrants issued in connection with the May 2018 Private Placement. The change in the warrant liability is primarily due to changes in our stock price. Additionally, we received interest and dividend income of $1.8 million for the year ended June 30, 2019 compared to $0.6 million for the year ended June 30, 2018. The increase was due to higher investment balances and higher yields during the year ended June 30, 2019 compared to the year ended June 30, 2018.

Comparison of Years Ended June 30, 2018 and 2017

We had a loss from operations of $28.6 million for the year ended June 30, 2018 compared to income from operations of $2.4 million for the year ended June 30, 2017.

Revenue:We recognized revenue of $1.6 million for the year ended June 30, 2018 compared to $23.2 million for the year ended June 30, 2017. Revenue for the year ended June 30, 2018 consisted of fees allocated to performance obligations in accordance with the Helsinn License Agreement. Revenue for the year ended June 30, 2017 also included income related to the completion of the performance obligations related to the upfront license fees in accordance with the Helsinn License Agreement.

Cost of Revenue: We recognized cost of revenue of $3.4 million for the year ended June 30, 2018 compared to $5.0 million for the year ended June 30, 2017. The cost of revenue includes external costs paid to third-party contractors to perform research, conduct clinical trials and develop and manufacture drug materials, and internal compensation and related personnel expenses associated with pracinostat. Cost of revenue relate to expenses for pracinostat incurred in connection with our development activities in accordance with the Helsinn License Agreement, including both Helsinn’s share and our share of costs related to the POC study (as defined below), which we are responsible for conducting.

Research and Development: The following is a summary of our research and development expenses to supplement the more detailed discussion below (in thousands):

	Years Ended June 30,
Research and development expenses	2018		2017
ME-401	$	5,766	$	2,565
Voruciclib		4,121		—
Pracinostat		22		(945	)
ME-344		685		66
Other		6,444		5,551
Total research and development expenses	$	17,038	$	7,237

Research and development expenses consist primarily of clinical trial costs (including payments to CROs),pre-clinical study costs, and costs to manufacture our drug candidates fornon-clinical and clinical studies. Other research and development expenses consist primarily of salaries and other personnel costs, share-based compensation, legal costs, and other costs not allocated to specific

32

drug programs. Research and development expenses increased by $9.8 million to $17.0 million for the year ended June 30, 2018 compared to $7.2 million for the year ended June 30, 2017. The increase was primarily due to an increase of $4.1 million in costs associated with voruciclib, including a $2.9 million upfront payment made for the license of voruciclib. Additionally, drug manufacturing costs related toME-401 increased by $2.6 million to supply planned clinical trials and there was a prior year reduction of clinical trial costs of $1.9 million due to revisions in estimates of amounts that were owed to contract research organizations for clinical trials for pracinostat andME-344 that were at or near completion. Other research and development costs increased by $0.9 million due to increased personnel costs and share-based compensation.

General and Administrative:General and administrative expenses increased by $1.2 million to $9.8 million for the year ended June 30, 2018 compared to $8.6 million for the year ended June 30, 2017. The increase primarily relates to professional services expenses, share-based compensation, and general corporate expenses incurred during the year ended June 30, 2018.

Other income or expense:We recognized other expense of $11.5 million for the year ended June 30, 2018 and other income of $286,000 for the year ended June 30, 2017. The expense in 2018 primarily consisted of a $9.7 million change in the fair value of outstanding warrants and $2.4 million in financing costs related to the May 2018 Private Placement, offset by interest on cash, cash equivalents, and short-term investments. The other income for the year ended June 30, 2017 consisted of interest on cash, cash equivalents and short-term investments.

New Accounting Pronouncements

See Note 1 to the Financial Statements included in Item 8 of this Annual Report.

Off-Balance Sheet Arrangements

We do not currently have anyoff-balance sheet arrangements.

Liquidity and Capital Resources

We have accumulated losses of $231.2 million since inception and expect to incur operating losses and generate negative cash flows from operations for the foreseeable future. As of June 30, 2019, we had $79.8 million in cash and cash equivalents, short-term investments, and common stock proceeds receivable, which we believe will be sufficient to fund our operations into fiscal year 2021. Our current business operations are focused on continuing the clinical development of our drug candidates. Changes to our research and development plans or other changes affecting our operating expenses may affect actual future use of existing cash resources. Our research and development expenses are expected to increase in the foreseeable future. We cannot determine with certainty costs associated with ongoing and future clinical trials or the regulatory approval process. The duration, costs and timing associated with the development of our product candidates will depend on a variety of factors, including uncertainties associated with the results of our clinical trials.

To date, we have obtained cash and funded our operations primarily through equity financings and license agreements. In order to continue the development of our drug candidates, at some point in the future we expect to pursue one or more capital transactions, whether through the sale of equity securities, license agreements or entry into strategic partnerships. There can be no assurance that we will be able to continue to raise additional capital in the future.

Sources and Uses of Our Cash

Net cash used in operations for the year ended June 30, 2019 was $29.4 million ($39.4 million, net of a $10.0 million license fee received from KKC, as described above). Net cash used in operating activities was $21.0 million for the year ended June 30, 2018. Net cash provided by operating activities was $3.5 million for the year ended June 30, 2017 ($17.4 million used in operating activities, net of $20.9 million in cash received under the Helsinn License Agreement). The increase in cash used in operating activities year over year is due to increased operating expenses incurred for research and development and general and administrative costs.

Net cash provided by investing activities for the year ended June 30, 2019 was $24.3 million compared to $44.3 million used in investing activities for the year ended June 30, 2018. The change was primarily due to higher purchases of short-term investments in 2018 as a result of the May 2018 Private Placement, net of maturities. Net cash used in investing activities for the year ended June 30, 2017 was $10.1 million.

Net cash provided by financing activities during the year ended June 30, 2019 was $1.4 million compared with $70.2 million provided by financing activities during the year ended June 30, 2018. Cash raised during the year ended June 30, 2019 reflected $1.1 million of proceeds from the exercise of warrants. Cash raised during the year ended June 30, 2018 reflected $70.2 million of net proceeds related to the May 2018 Private Placement. There was $4.2 million provided by financing activities during the year ended June 30, 2017, reflecting an equity investment by Helsinn.

Contractual Obligations

We have contracted with various consultants and third parties to assist us inpre-clinical research and development and clinical trials work for our leading drug compounds. The contracts are terminable at any time, but obligate us to reimburse the providers for any time or costs incurred through the date of termination. Additionally, we have employment agreements with certain of our current employees that provide for severance payments and accelerated vesting for share-based awards if their employment is terminated under specified circumstances.

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We have leased approximately 20,800 square feet of office space, located at 3611 Valley Centre Drive, San Diego, California. The location houses our executive and administrative offices. The lease commenced in July 2017 and expires in May 2020. The monthly rental rate is approximately $67,000 per month over the remaining term of the lease, plus a pro rata share of certain building expenses. The remaining contractual obligations are approximately $0.7 million.

Presage License Agreement

In September 2017, we entered into the Presage License Agreement. Under the terms of the Presage License Agreement, Presage granted to us exclusive worldwide rights to develop, manufacture and commercialize voruciclib, a clinical-stage, oral and selective CDK inhibitor, and related compounds. In exchange, we paid Presage $2.9 million. With respect to the first indication, an incremental $2.0 million payment, due upon dosing the first subject in the first registration trial will be owed to Presage, for total payments of $4.9 million prior to receipt of marketing approval of the first indication in the U.S., E.U. or Japan. Additional potential payments of up to $179 million will be due upon the achievement of certain development, regulatory and commercial milestones. We will also paymid-single-digit tiered royalties on the net sales of any product successfully developed. As an alternative to milestone and royalty payments related to countries in which we sublicense product rights, we will pay to Presage a tiered percent (which decreases as product development progresses) of amounts received from such sublicensees. As of June 30, 2019, we have not accrued any amounts for potential future payments.

S*Bio Purchase Agreement

We are party to a definitive asset purchase agreement with S*Bio, pursuant to which we acquired certain assets comprised of intellectual property and technology including rights to pracinostat. We agreed to make certain milestone payments to S*Bio based on the achievement of certain clinical, regulatory and net sales-based milestones, as well as to make certain contingent earnout payments to S*Bio. Milestone payments will be made to S*Bio up to an aggregate amount of $74.5 million if certain U.S., E.U. and Japanese regulatory approvals are obtained and if certain net sales thresholds are met in North America, the E.U. and Japan. The first milestone payment of $200,000 plus 166,527 shares of our common stock having a value of $500,000 was paid in August 2017 upon the first dosing of a patient in a Phase 3 clinical trial. Subsequent milestone payments will be due upon certain regulatory approvals and sales-based events. As of June 30, 2019, we have not accrued any amounts for potential future payments.

CyDex License Agreement

We are party to a license agreement with CyDex. Under the license agreement, CyDex granted to us an exclusive, nontransferable license to intellectual property rights relating to Captisol^® for use with our two isoflavone-based drug compounds (currentlyME-344). We agreed to pay to CyDex anon-refundable license issuance fee, future milestone payments, and royalties at a low, single-digit percentage rate on future sales of our approved drugs utilizing Captisol. Contemporaneously with the license agreement, CyDex entered into a commercial supply agreement with us, pursuant to which we agreed to purchase 100% of our requirements for Captisol from CyDex. We may terminate both the license agreement and the supply agreement for convenience at any time upon 90 days’ prior written notice. As of June  30, 2019, we have not accrued any amounts for potential future payments.

Item 7a. Quantitative and Qualitative Disclosures about Market Risk

Interest Rate Risk

Our exposure to market interest rates relates primarily to the investments of cash balances and short-term investments. We have cash reserves held in U.S. dollars and we place funds on deposit with financial institutions, which are readily available. Our short-term investments consist solely of U.S. government securities with a maturity of three to twelve months.

We place our cash deposits with high credit quality financial institutions and by policy limit the amount of credit exposure to any one corporation or bank. These deposits are in excess of the Federal Deposit Insurance Corporation (“FDIC”) insurance limits. We are adverse to principal loss and we ensure the safety and preservation of our invested funds by limiting default risk, market risk and reinvestment risk. We seek to mitigate default risk by depositing funds with high credit quality financial institutions, by limiting the amount of credit exposure to any one corporation or bank, by purchasing short-term investments consisting of U.S. government securities, and by positioning our portfolio to respond appropriately to a significant reduction in a credit rating of any such financial institution.

We do not consider the effects of interest rate movements to be a material risk to our financial condition.

Item 8. Financial Statements and Supplementary Data

MEI Pharma, Inc.

Index to Financial Statements

Report of Independent Registered Public Accounting Firm

Balance Sheets

Statements of Operations

Statements of Stockholders’ Equity

Statements of Cash Flows

Notes to Financial Statements

34

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Board of Directors and Stockholders

MEI Pharma, Inc.

San Diego, California

Opinion on the Financial Statements

We have audited the accompanying balance sheets of MEI Pharma, Inc. (the “Company”) as of June 30, 2019 and 2018, the related statements of operations, stockholders’ equity, and cash flows for each of the three years in the period ended June 30, 2019, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company at June 30, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended June 30, 2019, in conformity with accounting principles generally accepted in the United States of America.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the Company’s internal control over financial reporting as of June 30, 2019, based on criteria established in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”) and our report dated August 28, 2019 expressed an unqualified opinion thereon.

Change in Accounting Method Related to Revenue

As discussed in Note 1 to the financial statements, the Company changed its method of accounting for revenue during the year ended June 30, 2019 due to the adoption of the Accounting Standards Codification 606, “Revenue from Contracts with Customers.”

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ BDO USA, LLP

We have served as the Company’s auditor since 2011.

San Diego, California

August 28, 2019

35

MEI PHARMA, INC.

BALANCE SHEETS

(In thousands, except per share amounts)

	June 30,
	2019			2018
ASSETS
Current assets:
Cash and cash equivalents	$	9,590		$	13,309
Short-term investments		64,899			89,434
Total cash, cash equivalents and short-term investments		74,489			102,743
Common stock proceeds receivable (Note 7)		5,274			—
Prepaid expenses and other current assets		2,435			1,586
Total current assets		82,198			104,329
Intangible assets, net		261			296
Property and equipment, net		204			32
Total assets	$	82,663		$	104,657
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	4,787		$	3,643
Accrued liabilities		4,559			3,454
Deferred revenue		4,955			788
Total current liabilities		14,301			7,885
Deferred revenue, long-term		2,819			—
Warrant liability		17,613			46,313
Total liabilities		34,733			54,198
Commitments and contingencies (Note 9)
Stockholders’ equity:
Preferred stock, $0.01 par value; 100 shares authorized; none outstanding		—			—
Common stock, $0.00000002 par value; 226,000 shares authorized; 73,545 and 70,406 shares issued and outstanding at June 30, 2019 and 2018, respectively.		—			—
Additionalpaid-in-capital		279,148			264,858
Accumulated deficit		(231,218	)		(214,399	)
Total stockholders’ equity		47,930			50,459
Total liabilities and stockholders’ equity	$	82,663		$	104,657

See accompanying notes to financial statements.

36

MEI PHARMA, INC.

STATEMENTS OF OPERATIONS

(In thousands, except per share amounts)

	Years Ended June 30,
	2019			2018			2017
Revenue	$	4,915		$	1,622		$	23,249
Operating expenses:
Cost of revenue		4,263			3,383			5,000
Research and development		32,300			17,038			7,237
General and administrative		14,597			9,787			8,628
Total operating expenses		51,160			30,208			20,865
(Loss) income from operations		(46,245	)		(28,586	)		2,384
Other income (expense):
Change in fair value of warrant liability		27,632			(9,705	)		—
Financing costs associated with warrants		—			(2,367	)		—
Interest and dividend income		1,795			591			287
Income tax expense		(1	)		(1	)		(1	)
Net (loss) income	$	(16,819	)	$	(40,068	)	$	2,670
Net (loss) income:
Basic	$	(16,819	)	$	(40,068	)	$	2,670
Diluted	$	(54,613	)	$	(40,068	)	$	2,670
Net (loss) income per share:
Basic	$	(0.24	)	$	(0.97	)	$	0.07
Diluted	$	(0.75	)	$	(0.97	)	$	0.07
Shares used in computing net (loss) income per share:
Basic		71,139			41,431			36,813
Diluted		72,385			41,431			36,938

See accompanying notes to financial statements.

37

MEI PHARMA, INC.

STATEMENTS OF STOCKHOLDERS’ EQUITY

(In thousands)

	Common Shares		Additional paid in capital			Accumulated Deficit			Total Stockholders’ Equity
Balance at June 30, 2016		34,156	$	218,653		$	(177,001	)	$	41,652
Net income		—		—			2,670			2,670
Issuance of common stock		2,616		4,212			—			4,212
Share-based compensation expense		—		2,304			—			2,304
Balance at June 30, 2017		36,772		225,169			(174,331	)		50,838
Net loss		—		—			(40,068	)		(40,068	)
Issuance of common stock in private placement (Note 7)		33,003		35,910			—			35,910
Issuance of common stock for milestone payment (Note 9)		167		500			—			500
Issuance of common stock for vested restricted stock units		271		(267	)		—			(267	)
Exercise of stock options		193		329			—			329
Share-based compensation expense		—		3,217			—			3,217
Balance at June 30, 2018		70,406		264,858			(214,399	)		50,459
Net loss		—		—			(16,819	)		(16,819	)
Issuance of common stock		2,215		5,444			—			5,444
Exercise of warrants		440		2,186			—			2,186
Issuance of common stock for vested restricted stock units		246		(324	)		—			(324	)
Exercise of stock options		238		422			—			422
Share-based compensation expense		—		6,562			—			6,562
Balance at June 30, 2019		73,545	$	279,148		$	(231,218	)	$	47,930

See accompanying notes to financial statements.

38

MEI PHARMA, INC.

STATEMENTS OF CASH FLOWS

(In thousands)

	Years Ended June 30,
	2019			2018			2017
Cash flows from operating activities:
Net (loss) income	$	(16,819	)	$	(40,068	)	$	2,670
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Change in fair value of warrant liability		(27,632	)		9,705			—
Financing costs associated with warrants		—			2,367			—
Share-based compensation		6,562			3,217			2,304
Depreciation and amortization		80			53			85
Changes in operating assets and liabilities:
Prepaid expenses and other current assets		(849	)		172			(927	)
Accounts payable		1,144			3,058			(494	)
Accrued liabilities		1,105			669			(1,148	)
Deferred revenue		6,986			(208	)		996
Net cash (used in) provided by operating activities		(29,423	)		(21,035	)		3,486
Cash flows from investing activities:
Purchases of property and equipment		(217	)		—			(51	)
Purchases of short-term investments		(64,655	)		(114,233	)		(60,123	)
Proceeds from maturity of short-term investments		89,190			69,906			50,097
Net cash provided by (used in) investing activities		24,318			(44,327	)		(10,077	)
Cash flows from financing activities:
Proceeds from exercise of stock options		372			329			—
Proceeds from exercise of warrants		1,118			—			—
Payment of RSU tax withholdings in exchange for common shares surrendered by RSU holders		(324	)		(267	)		—
Issuance of common stock		220			70,151			4,212
Net cash provided by financing activities		1,386			70,213			4,212
Net (decrease) increase in cash and cash equivalents		(3,719	)		4,851			(2,379	)
Cash and cash equivalents at beginning of the period		13,309			8,458			10,837
Cash and cash equivalents at end of the period	$	9,590		$	13,309		$	8,458
Supplemental cash flow information:
Income taxes paid	$	(1	)	$	(1	)	$	(1	)
Non-cash financing activities:
Proceeds receivable- sale of common stock	$	5,224		$	—		$	—
Proceeds receivable- stock option exercises	$	50		$	—		$	—
Change in fair value of warrants exercised	$	1,068		$	—		$	—

See accompanying notes to financial statements.

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MEI PHARMA, INC.

NOTES TO FINANCIAL STATEMENTS

June 30, 2019

Note 1. The Company and Summary of Significant Accounting Policies

The Company

We are a late-stage pharmaceutical company focused on leveraging our extensive development and oncology expertise to identify and advance new therapies intended to meaningfully improve the treatment of cancer. Our portfolio of drug candidates contains four clinical-stage candidates, including one candidate in an ongoing Phase 3 global registration trial and another candidate in an ongoing Phase 2 clinical trial that we intend to submit to the U.S. Food and Drug Administration (“FDA”) to support accelerated approval of a marketing application. Our common stock is listed on the NASDAQ Capital Market under the symbol “MEIP”.

Clinical Development Programs

Our approach to building our pipeline is to license promising cancer agents and build value in programs through development, commercialization and strategic partnerships, as appropriate. Our drug candidate pipeline includes:

• ME-401, an oral phosphatidylinositol3-kinase (“PI3K”) delta inhibitor;

• Voruciclib, an oral cyclin-dependent kinase (“CDK”) inhibitor;

• ME-344, a mitochondrial inhibitor targeting the oxidative phosphorylation (“OXPHOS”) complex; and

• Pracinostat, an oral histone deacetylase (“HDAC”) inhibitor.

The results ofpre-clinical studies and completed clinical trials are not necessarily predictive of future results, and our current drug candidates may not have favorable results in later studies or trials. The commercial opportunity will be reduced or eliminated if competitors develop and market products that are more effective, have fewer side effects or are less expensive than our drug candidates. We will need substantial additional funds to progress the clinical trial programs for the drug candidatesME-401, voruciclib,ME-344 and pracinostat, and to develop new compounds. The actual amount of funds that will be needed are determined by a number of factors, some of which are beyond our control. Negative U.S. and global economic conditions may pose challenges to our business strategy, which relies on funding from the financial markets or collaborators.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires management to make estimates and assumptions that affect the amounts reported in the financial statements and disclosures made in the accompanying notes to the financial statements. We use estimates that affect the reported amounts (including assets, liabilities, revenues and expenses) and related disclosures. Actual results could materially differ from those estimates.

Liquidity

We have accumulated losses of $231.2 million since inception and expect to incur operating losses and generate negative cash flows from operations for the foreseeable future. As of June 30, 2019, we had $79.8 million in cash and cash equivalents, short-term investments, and common stock proceeds receivable, which we believe will be sufficient to meet obligations and fund our liquidity and capital expenditure requirements for at least the next 12 months from the issuance of these financial statements. Our current business operations are focused on continuing the clinical development of our drug candidates. Changes to our research and development plans or other changes affecting our operating expenses may affect actual future use of existing cash resources. Our research and development expenses are expected to increase in the foreseeable future. We cannot determine with certainty costs associated with ongoing and future clinical trials or the regulatory approval process. The duration, costs and timing associated with the development of our product candidates will depend on a variety of factors, including uncertainties associated with the results of our clinical trials.

To date, we have obtained cash and funded our operations primarily through equity financings and license agreements. In order to continue the development of our drug candidates, at some point in the future we expect to pursue one or more capital transactions, whether through the sale of equity securities, license agreements or entry into strategic partnerships. There can be no assurance that we will be able to continue to raise additional capital in the future.

Cash and Cash Equivalents

Cash and cash equivalents consist of cash and highly liquid investments with original maturities of three months or less when purchased. Cash is maintained at financial institutions and, at times, balances may exceed federally insured limits. We have never experienced any losses related to these balances.

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Short-Term Investments

Investments that have maturities of greater than three months but less than one year are classified as short-term investments. As of June 30, 2019 and 2018, our short-term investments consisted of $64.9 million and $89.4 million, respectively, in U.S. government securities. The short-term investments held as of June 30, 2019 and 2018 had maturity dates of less than one year, are considered to be “held to maturity” and are carried at amortized cost. As of June 30, 2019 and 2018, the gross holding gains and losses were immaterial.

Fair Value Measurements

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value is as follows:

• Level 1 — Observable inputs such as quoted prices in active markets for identical assets or liabilities.

• Level 2 — Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

• Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

We measure the following financial instruments at fair value on a recurring basis. The fair values of these financial instruments were as follows (in thousands):

	June 30, 2019							June 30, 2018
	Level 1		Level 2		Level 3			Level 1		Level 2		Level 3
Warrant liability	$	—	$	—	$	(17,613	)	$	—	$	—	$	(46,313	)
Total	$	—	$	—	$	(17,613	)	$	—	$	—	$	(46,313	)

The carrying amounts of financial instruments such as cash equivalents, short-term investments and accounts payable approximate the related fair values due to the short-term maturities of these instruments. We invest our excess cash in financial instruments which are readily convertible into cash, such as money market funds and U.S. government securities. Cash equivalents, where applicable, and short-term investments are classified as Level 1 as defined by the fair value hierarchy.

In May 2018, we issued warrants in connection with our private placement of shares of common stock. Pursuant to the terms of the warrants, we could be required to settle the warrants in cash in the event of an acquisition of the Company and, as a result, the warrants are required to be measured at fair value and reported as a liability in the Balance Sheet. We recorded the fair value of the warrants upon issuance using the Black-Scholes valuation model and are required to revalue the warrants at each reporting date with any changes in fair value recorded on our Statement of Operations. The valuation of the warrants is considered under Level 3 of the fair value hierarchy due to the need to use assumptions in the valuation that are both significant to the fair value measurement and unobservable. Inputs used to determine estimated fair value of the warrant liabilities include the estimated fair value of the underlying stock at the valuation date, the estimated term of the warrants, risk-free interest rates, expected dividends and the expected volatility of the underlying stock. The significant unobservable inputs used in the fair value measurement of the warrant liabilities were the volatility rate and the estimated term of the warrants. Generally, increases (decreases) in the fair value of the underlying stock and estimated term would result in a directionally similar impact to the fair value measurement. The change in the fair value of the Level 3 warrant liability is reflected in the Statement of Operations for the years ended June 30, 2019 and 2018.

To calculate the fair value of the warrant liability, the following assumptions were used:

	June 30, 2019			June 30, 2018
Risk-free interest rate		1.7	%		2.7	%
Expected life (years)		3.8			4.8
Expected volatility		56.8	%		77.3	%
Dividend yield		0.0	%		0.0	%
Black-Scholes Fair Value	$	1.10		$	2.81

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The following table sets forth a summary of changes in the estimated fair value of our Level 3 warrant liability for the year ended June 30, 2019 and 2018 (in thousands):

	Fair Value of Warrants Using Significant Unobservable Inputs (Level 3)
	2019			2018
Balance at July 1,	$	46,313		$	—
Issuance of liability classified warrants		—			36,608
Reclassification of derivative liability to equity upon exercise of warrants		(1,068	)		—
Change in estimated fair value of liability classified warrants		(27,632	)		9,705
Balance at June 30,	$	17,613		$	46,313

Intangible Assets

Intangible assets consist of patents acquired from S*Bio in August 2012, relating to a family of heterocyclic compounds that inhibit HDACs. Capitalized amounts are amortized on a straight-line basis over the expected life of the intellectual property of 14 years from the date of acquisition. The carrying values of intangible assets are periodically reviewed to determine if the facts and circumstances suggest that a potential impairment may have occurred. Results of operations for the years ended June 30, 2019, 2018 and 2017 do not reflect any write-downs associated with the potential impairment of intangible assets.

Property and Equipment

Property and equipment are stated at cost and depreciated over the estimated useful lives of the assets (generally three to seven years) using the straight-line method. Leasehold improvements are stated at cost and are amortized over the shorter of the estimated useful lives of the assets or the lease term.

Revenue Recognition

ASC Topic 606, Revenue from Contracts with Customers (“Topic 606” or the “new revenue standard”)

Beginning July 1, 2018, we recognize revenue when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. For enforceable contracts with our customers, we first identify the distinct performance obligations – or accounting units – within the contract. Performance obligations are commitments in a contract to transfer a distinct good or service to the customer.

Payments received under commercial arrangements, such as licensing technology rights, may includenon-refundable fees at the inception of the arrangements, milestone payments for specific achievements designated in the agreements, and royalties on the sale of products. At the inception of arrangements that include milestone payments, we use judgment to evaluate whether the milestones are probable of being achieved and we estimate the amount to include in the transaction price using the most likely method. If it is probable that a significant revenue reversal will not occur, the estimated amount is included in the transaction price. Milestone payments that are not within our or the licensee’s control, such as regulatory approvals, are not included in the transaction price until those approvals are received. At the end of each reporting period, were-evaluate the probability of achievement of development milestones and any related constraint and, as necessary, we adjust our estimate of the overall transaction price. Any adjustments are recorded on a cumulativecatch-up basis, which would affect revenues and earnings in the period of adjustment. To date, we have not recognized any material cumulativecatch-up adjustments from changes in our estimate of the transaction price.

We develop estimates of the stand-alone selling price for each distinct performance obligation and allocate the overall transaction price to each accounting unit based on a relative stand-alone selling price approach. We develop assumptions that require judgment to determine the stand-alone selling price for license-related performance obligations, which may include forecasted revenues, development timelines, reimbursement rates for personnel costs, discount rates and probabilities of technical, regulatory and commercial success. We estimate stand-alone selling price for research and development performance obligations by forecasting the expected costs of satisfying a performance obligation plus an appropriate margin.

In the case of a license that is a distinct performance obligation, we recognize revenue fromnon-refundable,up-front fees at the point in time when the license is transferred to the licensee and the licensee can use and benefit from the license. For licenses that are bundled with other obligations, we use judgment to assess the nature of the combined performance obligation to determine whether the combined performance obligation is satisfied over time or at a point in time and, if over time, the appropriate method of measuring progress for purposes of recognizing revenue. If the performance obligation is satisfied over time, we evaluate the measure of progress each reporting period and, if necessary, adjust the measure of performance and related revenue recognition.

The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services to be provided. Revenue is recorded proportionally as costs are incurred. We generally use thecost-to-cost measure of progress because it best depicts the transfer of control to the customer which occurs as we incur costs. Under thecost-to-cost measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation (an “input method” under Topic 606). We use judgment to estimate the

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total cost expected to complete the research and development performance obligations, which include subcontractors’ costs, labor, materials, other direct costs and an allocation of indirect costs. We evaluate these cost estimates and the progress each reporting period and, as necessary, we adjust the measure of progress and related revenue recognition. To date, we have not recognized any material cumulativecatch-up adjustments from changes in our estimate of the measure of progress.

For arrangements that include sales-based or usage-based royalties, we recognize revenue at the later of (i) when the related sales occur or (ii) when the performance obligation to which some or all of the royalty has been allocated has been satisfied or partially satisfied. To date, we have not recognized any sales-based royalty revenue from license agreements.

We recognized revenue associated with the following license agreements (in thousands):

	Years Ended June 30,
	2019		2018		2017
KKC License Agreement	$	2,557	$	—	$	—
Helsinn License Agreement		2,358		1,622		23,249
	$	4,915	$	1,622	$	23,249
Timing of Revenue Recognition:
License transferred at a point in time	$	879	$	—	$	20,880
Services performed over time		4,036		1,622		2,369
	$	4,915	$	1,622	$	23,249

Revenue for the year ended June 30, 2019 included revenue related to the KKC License Agreement (Note 2). Based on the characteristics of the KKC License Agreement, delivery of the license is a distinct performance obligation, and we recognized related revenue of $0.9 million during the year ended June 30, 2019 when the license was transferred to the licensee and the licensee could use and benefit from the license. The license agreement included other distinct performance obligations that will be satisfied over time, and accordingly we recognized $1.7 million related to our progress toward satisfying those obligations during the year ended June 30, 2019.

Revenue for the years ended June 30, 2019, 2018 and 2017 included revenue related to the Helsinn License Agreement (Note 2). Based on the characteristics of the Helsinn License Agreement, control of the remaining deliverables occurs over time and therefore we recognize revenue based on the extent of progress towards completion of the performance obligations.

As of June 30, 2019, we had $7.8 million of deferred revenue associated with our remaining performance obligations under the KKC and Helsinn license agreements. We expect to recognize approximately $5.0 million of deferred revenue in the next 12 months, and an additional $2.8 million thereafter.

Contract Balances

The following table presents changes in contract assets and contract liabilities during the year ended June 30, 2019 (in thousands):

	As of July 1, 2018		Net Change			As of June 30, 2019
Receivables	$	82	$	(82	)	$	—
Contract Assets	$	312	$	374		$	686
Contract Liabilities	$	788	$	6,986		$	7,774

The timing of revenue recognition, invoicing and cash collections results in billed accounts receivable and unbilled receivables (contract assets), which are classified as “prepaid expenses and other current assets” on our Balance Sheet, and deferred revenue (contract liabilities). We invoice our customers in accordance with agreed-upon contractual terms, typically at periodic intervals or upon achievement of contractual milestones. Invoicing may occur subsequent to revenue recognition, resulting in contract assets. We may receive advance payments from our customers before revenue is recognized, resulting in contract liabilities. The contract assets and liabilities reported on the Balance Sheet relate to the KKC License Agreement and Helsinn License Agreement.

Accounting Standard Codification (“ASC”) Topic 605, Revenue Recognition (“Topic 605”)

Revenue Recognition

Payments received under commercial arrangements, such as licensing technology rights, may includenon-refundable fees at the inception of the arrangements, milestone payments for specific achievements designated in the agreements, and royalties on the sale of products. We consider a variety of factors in determining the appropriate method of accounting under our license agreements, including whether the various elements can be separated and accounted for individually as separate units of accounting.

Multiple Element Arrangements

Deliverables under an arrangement will be separate units of accounting, provided (i) a delivered item has value to the customer on a standalone basis; and (ii) the arrangement includes a general right of return relative to the delivered item, and delivery or performance of the undelivered item is considered probable and substantially in our control.

We account for revenue arrangements with multiple elements by separating and allocating consideration according to the relative selling price of each deliverable. If an element can be separated, an amount is allocated based upon the relative selling price of each element. We determine the relative selling price of a separate deliverable using the price we charge other customers when we sell that element separately. If the element is not sold separately and third party pricing evidence is not available, we will use our best estimate of selling price.

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License Fee Revenue

Non-refundable,up-front fees that are not contingent on any future performance by us and require no consequential continuing involvement on our part are recognized as revenue when the license term commences and the licensed data, technology or product is delivered. We defer recognition ofnon-refundable upfront license fees if we have continuing performance obligations, without which the licensed data, technology, or product has no utility to the licensee separate and independent of our performance under the other elements of the applicable arrangement. The specific methodology for the recognition of the revenue is determined on acase-by-case basis according to the facts and circumstances of the applicable agreement.

Research and Development Revenue

Research and development revenue represents ratable recognition of fees allocated to research and development activities. We defer recognition of research and development revenue until the performance of the related research and development activities has occurred. Research and development revenue for the year ended June 30, 2018 and 2017 related to services provided by third-party vendors related to research and development activities performed under the Helsinn License Agreement (Note 2).

Cost of Revenue

Cost of revenue primarily includes external costs paid to third-party contractors to perform research, conduct clinical trials and develop and manufacture drug materials, and internal compensation and related personnel expenses to support our research and development performance obligations associated with the Helsinn License Agreement.

Research and Development Costs

Research and development costs are expensed as incurred and include costs paid to third-party contractors to perform research, conduct clinical trials and develop and manufacture drug materials. Clinical trial costs, including costs associated with third-party contractors, are a significant component of research and development expenses. We expense research and development costs based on work performed. In determining the amount to expense, management relies on estimates of total costs based on contract components completed, the enrollment of subjects, the completion of trials, and other events. Costs incurred related to the purchase or licensing ofin-process research and development for early-stage products or products that are not commercially viable and ready for use, or have no alternative future use, are charged to expense in the period incurred.

Share-based Compensation

Share-based compensation expense for employees and directors is recognized in the Statement of Operations based on estimated amounts, including the grant date fair value and the expected service period. For stock options, we estimate the grant date fair value using a Black-Scholes valuation model, which requires the use of multiple subjective inputs including estimated future volatility, expected forfeitures and the expected term of the awards. We estimate the expected future volatility based on the stock’s historical price volatility. The stock’s future volatility may differ from the estimated volatility at the grant date. For restricted stock unit (“RSU”) equity awards, we estimate the grant date fair value using our closing stock price on the date of grant. We recognize the effect of forfeitures in compensation expense when the forfeitures occur. The estimated forfeiture rates may differ from actual forfeiture rates which would affect the amount of expense recognized during the period. We recognize the value of the awards over the awards’ requisite service or performance periods. The requisite service period is generally the time over which our share-based awards vest.

Interest and Dividend Income

Interest on cash balances is recognized when earned. Dividend income is recognized when the right to receive the payment is established.

Income Taxes

Our income tax expense consists of current and deferred income tax expense or benefit. Current income tax expense or benefit is the amount of income taxes expected to be payable or refundable for the current year. A deferred income tax asset or liability is recognized for the future tax consequences attributable to tax credits and loss carryforwards and to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized. As of June 30, 2019 and 2018, we have established a valuation allowance to fully reserve our net deferred tax assets. Tax rate changes are reflected in income during the period such changes are enacted. Changes in our ownership may limit the amount of net operating loss carryforwards that can be utilized in the future to offset taxable income.

In December 2017, the U.S government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act reduced the corporate tax rate from 34% to 21%, effective for tax years beginning January 1, 2018. We are subject to the provisions of the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification740-10, Income Taxes, which requires that the effect on deferred tax assets and liabilities of a change in tax rates be recognized in the period the tax rate change was enacted.

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Pursuant to the Securities and Exchange Commission Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (SAB 118), given the amount and complexity of the changes in tax law resulting from the Tax Act, the Company had not finalized the accounting for the income tax effects of the Tax Act as of June 30, 2018. In connection with our initial analysis of the impact of the Tax Act, the Company recorded anon-cash tax expense of $15.9 million during the year ended June 30, 2018, due to there-measurement of our deferred tax assets and liabilities at the new U.S. federal tax rate, offset by a corresponding change to the Company’s valuation allowance. December 22, 2018 marked the end of the measurement period for purposes of SAB 118. As such, the Company completed our analysis based on legislative updates relating to the Tax Act currently available, and no material adjustments have been recorded as of June 30, 2019.

The FASB Topic on Income Taxes prescribes a recognition threshold and measurement attribute criteria for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must bemore-likely-than-not to be sustained upon examination by taxing authorities. An uncertain income tax position will not be recognized if it has less than a 50% likelihood of being sustained. There were no unrecognized tax benefits as of June 30, 2019 and 2018.

Net (Loss) Income Per Share

Basic and diluted net (loss) income per share are computed using the weighted-average number of shares of common stock outstanding during the period, less any shares subject to repurchase or forfeiture. There were no shares of common stock subject to repurchase or forfeiture for the years ended June 30, 2019, 2018 and 2017. Our potentially dilutive shares, which include outstanding stock options, restricted stock units, and warrants, are considered to be common stock equivalents and are only included in the calculation of diluted net loss per share when their effect is dilutive. The assessment of dilution is made on a quarterly basis and therefore the annual determination of diluted net loss per share only includes those quarters in which the potential common stock equivalents were determined to be dilutive. For the years ended June 30, 2019, 2018 and 2017, we did not have any items that would be classified as other comprehensive income or losses.

The following table presents the calculation of net loss (income) used to calculate basic and diluted loss (income) per share (in thousands):

	Years Ended June 30,
	2019			2018			2017
Net (loss) income—basic	$	(16,819	)	$	(40,068	)	$	2,670
Change in fair value of warrant liability		(37,794	)		—			—
Net (loss) income—diluted	$	(54,613	)	$	(40,068	)	$	2,670

Shares used in calculating net (loss) income per share was determined as follows (in thousands):

	Years Ended June 30,
	2019		2018		2017
Weighted average shares outstanding		71,139		41,064		36,435
Effect of vested restricted stock units		—		367		378
Weighted average shares used in calculating basic (loss) income per share		71,139		41,431		36,813
Effect of potentially dilutive common shares from equity awards and liability-classified warrants		1,246		—		125
Weighted average shares used in calculating diluted (loss) income per share		72,385		41,431		36,938

The following potentially dilutive shares (in thousands) that have been excluded from the calculation of net (loss) income per share because of their anti-dilutive effect:

	Years Ended June 30,
	2019		2018		2017
Stock options		8,057		5,606		3,749
Restricted stock units		32		336		—
Warrants		8,062		3,532		3,582
Total anti-dilutive shares		16,151		9,474		7,331

Recent Accounting Pronouncements

Adopted Accounting Standards

In May 2014, the FASB issued Accounting Standards UpdateNo. 2014-09 (Topic 606) “Revenue from Contracts with Customers.” The FASB subsequently issued a number of narrow-scope technical improvements to Topic 606 before it became effective. The guidance in Topic 606 provides companies with a single model for accounting for revenue arising from contracts with customers and supersedes prior revenue recognition guidance under ASC Topic 605, “Revenue Recognition” (Topic 605). On July 1, 2018, we adopted Topic 606 using the modified retrospective method applied to those contracts which were not completed as of the adoption date. We did not record any adjustment to opening retained earnings as of July 1, 2018 as the adoption of Topic 606 did not have an impact on our financial statements. Refer toRevenue Recognition for further details of accounting for revenue with customers.

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Accounting Standards Not Yet Adopted

In February 2016, the FASB issued ASU2016-02 Leases, which introduces the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous guidance. The new standard establishes aright-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement.

A modified retrospective transition approach is required, applying the new standard to all leases existing at the date of initial application. An entity may choose to use either (1) its effective date or (2) the beginning of the earliest comparative period presented in the financial statements as its date of initial application. We will adopt the new lease standard effective July 1, 2019 and use the effective date as our date of initial application. Consequently, financial information will not be updated and the disclosures required under the new standard will not be provided for dates and periods before July 1, 2019.

The new standard provides a number of optional practical expedients in transition. We plan to elect the package of practical expedients, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs.

We expect that this standard will not have a material effect on our financial statements. The most significant effects relate to (1) the recognition of new ROU assets and lease liabilities on our balance sheet for our real property operating lease; and (2) providing new disclosures about our leasing activities.

On adoption, we currently expect to recognize an additional operating lease liability with a corresponding ROU asset of approximately $0.7 million based on the present value of the remaining minimum rental payments under current leasing standards for existing operating leases.

Note 2. License Agreements

KKC License Agreement

In October 2018, we, as licensor, entered into a license agreement with Kyowa Kirin Co., Ltd., a Japanese life sciences company (“KKC”) forME-401 (“the KKC License Agreement”) (formerly “Kyowa Hakko Kirin Co., Ltd.” or “KHK”). Under the terms of the KKC License Agreement, KKC was granted the exclusive right to develop and commercializeME-401 in Japan. We also granted KKC the right to purchase supply ofME-401 for commercial requirements at cost plus apre-negotiated percentage, as well as manufacturing rights in Japan. In return, we received an upfront payment of $10.0 million and are also eligible to receive up to $87.5 million in additional development and commercialization milestones, as well as royalties on net sales ofME-401 in Japan extending into themid-teens. The KKC License Agreement expires at the end of the royalty term, that is, upon the last to occur of (a) expiration of our patents in Japan, (b) expiration of regulatory exclusivity forME-401 in Japan or (c) 10 years from the first commercial sale ofME-401 in Japan.

We assessed the KKC License Agreement in accordance with ASC 606 and determined that our performance obligations comprise the license, research and development obligations, and our obligation to provide clinical trial materials to KKC.

We determined that the transaction price amounts to the upfront payment of $10.0 million. Future milestone payments are fully contingent as the risk of significant revenue reversal will only be resolved depending on future research and development and/or regulatory approval outcomes. We willre-evaluate the likelihood of achieving future milestones at the end of each reporting period.

We determined that control of the license was transferred to KKC during the year ended June 30, 2019. Revenue allocated to the research and development obligations is recognized based on the proportional performance of these research and development activities, which we expect to recognize through fiscal year 2022. Revenue allocated to providing clinical trial materials is recognized upon delivery.

Helsinn License Agreement

In August 2016, we, as licensor, entered into an exclusive worldwide license, development, manufacturing and commercialization agreement with Helsinn Healthcare SA, a Swiss pharmaceutical corporation (“Helsinn”) for pracinostat in acute myeloid leukemia (“AML”), myelosdisplastic syndrome (“MDS”) and other potential indications (the “Helsinn License Agreement”). Under the terms of the agreement, Helsinn was granted a worldwide exclusive license to develop, manufacture and commercialize pracinostat, and is primarily responsible for funding its global development and commercialization. As compensation for such grant of rights, we received payments of $20.0 million. In addition, we are eligible to receive up to $444 million in potential regulatory and sales-based milestones, along with royalty payments on the net sales of pracinostat, which, in the U.S., are tiered and begin in themid-teens.

We determined that the agreement contains multiple performance obligations for purposes of revenue recognition. Revenue related to the research and development elements of the arrangement is recognized based on the extent of progress toward completion of each performance obligation. Revenue is recognized on a gross basis as we are the primary obligor and have discretion in supplier selection. During the year ended June 30, 2019, our only remaining performance obligation under the agreement is the conduct of a Phase 2 dose-optimization study of pracinostat in combination with azacitidine in patients with high and very high risk MDS who are previously untreated with hypomethylating agents (the “POC study”), for which Helsinn has agreed to share third-party expenses.

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Presage License Agreement

In September 2017, we, as licensee, entered into a license agreement with Presage Biosciences, Inc. (“Presage”). Under the terms of the license agreement, Presage granted to us exclusive worldwide rights to develop, manufacture and commercialize voruciclib, a clinical-stage, oral and selective CDK inhibitor, and related compounds. In exchange, we paid $2.9 million. With respect to the first indication, an incremental $2.0 million payment, due upon dosing of the first subject in the first registration trial will be owed to Presage, for total payments of $4.9 million prior to receipt of marketing approval of the first indication in the U.S., E.U. or Japan. Additional potential payments of up to $179 million will be due upon the achievement of certain development, regulatory and commercial milestones. We will also paymid-single-digit tiered royalties on the net sales of any product successfully developed. As an alternative to milestone and royalty payments related to countries in which we sublicense product rights, we will pay to Presage a tiered percent (which decreases as product development progresses) of amounts received from such sublicensees.

CyDex License Agreement

We, as licensee, are party to a license agreement with CyDex Pharmaceuticals, Inc. (“CyDex”). Under the terms of the license agreement, CyDex granted to us an exclusive, nontransferable license to intellectual property rights relating to Captisol^® for use with our isoflavone-based drug compounds (currentlyME-344). We agreed to pay to CyDex anon-refundable license issuance fee, future milestone payments, and royalties at a low, single-digit percentage rate on future sales of our approved drugs utilizing Captisol. Contemporaneously with the license agreement, CyDex entered into a commercial supply agreement with us, pursuant to which we agreed to purchase 100% of our requirements for Captisol from CyDex. We may terminate both the license agreement and the supply agreement at any time upon 90 days’ prior written notice.

Note 3. BeiGene Collaboration

In October 2018, we entered into a clinical collaboration with BeiGene, Ltd. (“BeiGene”) to evaluate the safety and efficacy ofME-401 in combination with BeiGene’s zanubrutinib, an investigational inhibitor of Bruton’s tyrosine kinase (“BTK”), for the treatment of patients withB-cell malignancies. Under the terms of the clinical collaboration agreement, we amended our ongoing Phase 1b trial to include evaluation ofME-401 in combination with zanubrutinib in patients withB-cell malignancies. Study costs are being shared equally by the parties, and we agreed to supplyME-401 and BeiGene agreed to supply zanubrutinib. We record the costs reimbursed by BeiGene as a reduction of our research and development expenses. We retained full commercial rights forME-401 and BeiGene retained full commercial rights for zanubrutinib.

Note 4. Intangible Assets

Intangible assets consisted of the following, in thousands:

	June 30,
	2019			2018
S*Bio Patents—Gross	$	500		$	500
Less: accumulated amortization		(239	)		(204	)
Intangible assets, net	$	261		$	296

Amortization expense of intangible assets for the years ended June 30, 2019, 2018 and 2017 was $35,000 in each year. We expect to record amortization of $35,000 per year through 2026 for our S*Bio patents.

Note 5. Property and Equipment

Property and equipment consisted of the following, in thousands:

	June 30,
	2019			2018
Furniture and equipment	$	250		$	81
Leasehold improvements		48			—
		298			81
Less: accumulated depreciation		(94	)		(49	)
Property and equipment, net	$	204		$	32

Depreciation expense of property and equipment for the years ended June 30, 2019, 2018 and 2017 was $45,000, $18,000 and $50,000, respectively.

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Note 6. Accrued Liabilities

Accrued liabilities consisted of the following, in thousands:

	June 30,
	2019		2018
Accruedpre-clinical and clinical trial expenses	$	2,014	$	1,234
Accrued compensation and benefits		1,973		1,766
Accrued legal and professional services expenses		316		251
Other		256		203
Total accrued liabilities	$	4,559	$	3,454

Note 7. Stockholders’ Equity

Equity Transactions

Shelf Registration Statement

We have a shelf registration statement that permits us to sell, from time to time, up to $150.0 million of common stock, preferred stock and warrants. In November 2017, we entered into anAt-The-Market Equity Offering Sales Agreement (the “ATM Sales Agreement”), pursuant to which we may sell an aggregate of up to $30.0 million of our common stock pursuant to the shelf registration statement. During the year ended June 30, 2019, we sold 2,214,658 shares under the ATM Sales Agreement for $5.4 million, after deducting offering costs; $5.2 million of these proceeds were received on July 2, 2019 and are recorded as common stock proceeds receivable as of June 30, 2019. As of June 30, 2019, there is $144.4 million aggregate value of securities available under the shelf registration statement.

May 2018 Private Placement

In May 2018, we raised $70.2 million, net of transaction costs, in a private placement of common shares and warrants. We issued and sold 33,003,296 shares of common stock, as well as warrants to purchase 16,501,645 shares. The price was approximately $2.27 to purchase one share with an accompanying warrant; each warrant is for the purchase ofone-half of a share. The warrants are exercisable at a price of $2.54 per share and expire in May 2023. The warrants were fully vested upon issuance in May 2018. In the event of a sale of the Company, the terms of the warrants require us to use our best efforts to ensure the holders of such warrants will have a continuing right to purchase shares of the acquirer and, if our efforts are unsuccessful, to make a payment to such warrant holders based on a Black-Scholes valuation (using variables as specified in the warrants). Therefore, we are required to account for the warrants as liabilities and record them at fair value. We recorded the fair value of the warrants of $36.6 million upon issuance using the Black-Scholes valuation model. The warrants were revalued as of June 30, 2019 and 2018 at $17.6 million and $46.3 million, respectively; the changes in fair value were recorded in our Statement of Operations. During the year ended June 30, 2019, warrants were exercised for 440,043 shares of common stock, and we received proceeds of $1.1 million. As of June 30, 2019, there were outstanding warrants to purchase 16,061,602 shares of our common stock.

Helsinn Equity Investment

On August 5, 2016, we entered into the Helsinn Equity Agreement. Pursuant to the terms of the Helsinn Equity Agreement, we issued 2,616,431 shares of common stock on August 16, 2016 in exchange for a $5.0 million investment. The transaction was exempt from registration pursuant to Section 4(a)(2) of the Securities Act.

Description of Capital Stock

Our total authorized share capital is 226,100,000 shares consisting of 226,000,000 shares of common stock, $0.00000002 par value per share, and 100,000 shares of preferred stock, $0.01 par value per share.

CommonStock

The holders of common stock are entitled to one vote per share. In the event of a liquidation, dissolution or winding up of our affairs, holders of the common stock will be entitled to share rateably in all our assets that are remaining after payment of our liabilities and the liquidation preference of any outstanding shares of preferred stock. All outstanding shares of common stock are fully paid andnon-assessable. The rights, preferences and privileges of holders of common stock are subject to any series of preferred stock that we have issued or that we may issue in the future. The holders of common stock have nopre-emptive rights and are not subject to future calls or assessments by us.

PreferredStock

Our Board of Directors has the authority to issue up to 100,000 shares of preferred stock with par value of $.01 per share in one or more series and to fix the rights, preferences, privileges and restrictions in respect of that preferred stock, including dividend rights, dividend rates, conversion rights, voting rights, terms of redemption (including sinking fund provisions), redemption prices and liquidation preferences, and the number of shares constituting such series and the designation of any such series, without future vote or action by the stockholders. Therefore, the board without the approval of the stockholders could authorize the issue of preferred stock with voting, conversion and other rights that could affect the voting power, dividend and other rights of the holders of shares or that could have the effect of delaying, deferring or preventing a change of control. There were no shares of preferred stock outstanding as of June 30, 2019 or 2018.

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Note 8. Share-based Compensation

We use equity-based compensation programs to provide long-term performance incentives for our employees. These incentives consist primarily of stock options and RSUs. In December 2008, we adopted the MEI Pharma, Inc. 2008 Stock Omnibus Equity Compensation Plan (“2008 Plan”), as amended and restated in 2011, 2013, 2014, 2015, 2016 and 2018, under which 19,089,794 shares of common stock are authorized for issuance. The 2008 Plan provides for the grant of options and/or other stock-based or stock-denominated awards to ournon-employee directors, officers, employees and advisors. As of June 30, 2019, there were 9,486,844 shares available for future grant under the 2008 Plan.

Total share-based compensation expense for all stock awards consists of the following, in thousands:

	Years Ended June 30,
	2019		2018		2017
Research and development	$	2,239	$	1,176	$	839
General and administrative		4,323		2,041		1,465
Total share-based compensation	$	6,562	$	3,217	$	2,304

Stock Options

Stock options granted to employees vest ratably each month for a period of 36 months, or vest 25% one year from the date of grant and ratably each month thereafter for a period of 36 months, and expire either five years or ten years from the date of grant. Stock options granted to directors vest ratably each month for a period of 12 months from the date of grant, and expire either five years or ten years from the date of grant. As of June 30, 2019, there were a total of 8,356,961 options outstanding.

A summary of our stock option activity and related data follows:

	Number of Options			Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
Outstanding at June 30, 2018		6,281,615		$	3.08
Granted		3,119,250		$	3.90
Exercised		(237,810	)	$	1.78
Forfeited / Cancelled		(452,240	)	$	3.10
Expired		(353,854	)	$	8.30
Outstanding at June 30, 2019		8,356,961		$	3.20		7.6	$	2,571,190
Vested and exercisable at June 30, 2019		3,980,033		$	2.86		6.3	$	2,127,106

As of June 30, 2019, the aggregate intrinsic value of outstanding options is calculated as the difference between the exercise price of the underlying options and the closing price of our common stock of $2.50 on that date. The total fair value of options that vested during the years ended June 30, 2019, 2018 and 2017 was $3.4 million, $2.4 million and $2.4 million, respectively.

A summary of our nonvested stock option activity:

	Number of Options			Weighted-Average Grant Date Fair Value
Nonvested at June 30, 2018		3,232,930		$	2.15
Granted		3,119,250		$	2.78
Forfeited		(411,210	)	$	2.28
Vested		(1,564,042	)	$	2.17
Nonvested at June 30, 2019		4,376,928		$	2.58

Unrecognized compensation expense related tonon-vested stock options totalled $5.6 million as of June 30, 2019. Such compensation expense is expected to be recognized over a weighted-average period of 1.8 years. As of June 30, 2019, we expect all outstanding options to vest.

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We use a Black-Scholes valuation model to estimate the grant date fair value of stock options. To calculate these fair values, the following weighted-average assumptions were used:

	Years Ended June 30,
	2019			2018			2017
Risk-free interest rate		2.7	%		2.3	%		1.3	%
Expected life (years)		6.0			6.0			5.9
Expected volatility		82.5	%		93.7	%		107.4	%
Dividend yield		0.0	%		0.0	%		0.0	%
Weighted-average grant date fair value	$	2.78		$	2.40		$	1.15

Restricted Stock Units

In March 2013, the Compensation Committee of the Board of Directors granted 400,000 RSUs to our Chief Executive Officer. Each RSU represented the contingent right to receive one share of our common stock. The shares underlying the RSUs were delivered on March 29, 2018, and we issued 271,080 shares of common stock, net of shares withheld to cover taxes and fees. The fair value of the RSUs on the date of grant was $3.5 million.

In June 2016, we granted 364,726 RSUs to employees. Each RSU represented the contingent right to receive one share of our common stock. The RSUs were subject to performance criteria that were met in August 2016. The fair value of the RSUs was measured at $1.61 per unit on the date the performance criteria were met. The RSUs vested in August 2018, and we released 332,193 RSU shares. We issued 245,782 shares of common stock to RSU holders; 86,411 shares were surrendered to us by RSU holders as payment for the employee portion of the required withholding of associated payroll taxes.

Note 9. Commitments and Contingencies

We have contracted with various consultants and third parties to assist us inpre-clinical research and development and clinical trials work for our leading drug compounds. The contracts are terminable at any time, but obligate us to reimburse the providers for any time or costs incurred through the date of termination. We also have employment agreements with certain of our current employees that provide for severance payments and accelerated vesting for share-based awards if their employment is terminated under specified circumstances.

We have leased approximately 20,800 square feet of office space, located at 3611 Valley Centre Drive, San Diego, California. The location houses our executive and administrative offices. The lease commenced in July 2017 and expires in May 2020. The monthly rental rate is approximately $67,000 per month over the remaining term of the lease, plus a pro rata share of certain building expenses. The remaining contractual obligations are approximately $0.7 million.

Presage License Agreement

As discussed in Note 2, we are party to a license agreement with Presage under which we may be required to make future payments upon the achievement of certain development, regulatory and commercial milestones, as well as potential future royalties based upon net sales. As of June 30, 2019, we have not accrued any amounts for potential future payments.

S*Bio Purchase Agreement

We are party to a definitive asset purchase agreement with S*Bio, pursuant to which we acquired certain assets comprised of intellectual property and technology including rights to pracinostat. We agreed to make certain milestone payments to S*Bio based on the achievement of certain clinical, regulatory and net sales-based milestones, as well as to make certain contingent earnout payments to S*Bio. Milestone payments will be made to S*Bio up to an aggregate amount of $75.2 million if certain U.S., E.U. and Japanese regulatory approvals are obtained and if certain net sales thresholds are met in North America, the E.U. and Japan. The first milestone payment of $200,000 plus 166,527 shares of our common stock having a value of $500,000 was paid in August 2017 upon the first dosing of a patient in a Phase 3 clinical trial. Subsequent milestone payments will be due upon certain regulatory approvals and sales-based events. As of June 30, 2019, we have not accrued any amounts for potential future payments.

CyDex License Agreement

As discussed in Note 2, we are party to a license agreement with CyDex under which we may be required to make future payments upon the achievement of certain milestones, as well as potential future royalties based upon net sales. Contemporaneously with the license agreement, CyDex entered into a commercial supply agreement with us, pursuant to which we agreed to purchase 100% of our requirements for Captisol from CyDex. As of June 30, 2019, we have not accrued any amounts for potential future payments.

Note 10. Segment Information

We have one operating segment, the development of pharmaceutical compounds. All of our assets and liabilities were located in the United States of America as of June 30, 2019, 2018 and 2017.

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Note 11. Income Taxes

Pre-tax income (loss) consists of the following jurisdictions (in thousands):

	Years Ended June 30,
	2019			2018			2017
Domestic	$	(16,819	)	$	(40,068	)	$	2,670
Foreign		—			—			—
Pre-tax income (loss)	$	(16,819	)	$	(40,068	)	$	2,670

The reconciliation of income tax computed at the U.S. federal statutory tax rates to income tax expense is as follows (in thousands):

	Years Ended June 30,
	2019						2018						2017
	$			%			$			%			$			%
Tax benefit (expense) at U.S. statutory rates	$	3,532			21	%	$	11,019			28	%	$	(908	)		34	%
State tax		86			1	%		(5,370	)		-13	%		(158	)		6	%
Other		(478	)		-3	%		(537	)		-1	%		(208	)		8	%
Capital loss carryover expiration		—			0	%		—			0	%		(26,382	)		988	%
(Increase) decrease in valuation allowance		(9,082	)		-54	%		14,914			37	%		27,655			-1036	%
Revaluation of deferred taxes		—			0	%		(15,870	)		-40	%		—			0	%
Equity compensation		138			1	%		(837	)		-2	%		—			0	%
Warrant liability costs		5,803			35	%		(3,320	)		-8	%		—			0	%
	$	(1	)		0	%	$	(1	)		0	%	$	(1	)		0	%

Deferred tax liabilities and assets are comprised of the following (in thousands):

	June 30,
	2019			2018
Deferred tax assets:
Tax carried forward losses	$	18,510		$	8,893
Fixed and intangible assets		15,328			17,790
Share-based payments		3,081			2,354
Capital lease obligation		1,635			171
Compensation accruals		85			367
Consultant and other accruals		41			35
Charitable contributions		22			11
Total deferred tax assets		38,702			29,621
Valuation allowance for deferred tax assets		(38,702	)		(29,621	)
Net deferred tax assets and liabilities	$	—		$	—

We evaluate the recoverability of the deferred tax assets and the amount of the required valuation allowance. Due to the uncertainty surrounding the realization of the tax deductions in future tax returns, we have recorded a valuation allowance against our net deferred tax assets as of June 30, 2019 and 2018. At such time as it is determined that it is more likely than not that the deferred tax assets will be realized, the valuation allowance would be reduced.

We had federal and state net operating loss carryforwards of approximately $81.8 million and $19.0 million as of June 30, 2019. Under the Tax Act, the federal net operating losses generated in tax years ending subsequent to December 31, 2017 will be carried forward indefinitely.Pre-tax reform federal net operating loss carryforwards of approximately $20.1 million will begin to expire in 2022. Net operating loss carryforwards generated in tax years ending subsequent to December 31, 2017 are approximately $61.7 million. State net operating loss carryforwards will begin to expire in 2030.

Our ability to utilize our net operating loss carryforwards may be substantially limited due to ownership changes that have occurred or that could occur in the future under Section 382 of the Internal Revenue Code and similar state laws. During 2017, we completed a study to analyze whether one or more ownership changes had occurred through August 31, 2016, and determined that two such ownership changes did occur. Afollow-up study was completed during the year ended June 30, 2019 to identify whether any additional ownership changes had occurred as a result of the May 2018 stock issuance. The analysis concluded no additional ownership changes had taken place as of June 30, 2018. While the ownership changes do limit the amount of net operating loss we are able to use each year, all of our net operating losses were expected to be available for utilization prior to expiring.

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None of our prior income tax returns have been selected for examination by a major taxing jurisdiction; however, the statutes of limitations for various filings remain open. The oldest filings subject to potential examination for federal and state purposes are 2016 and 2015, respectively. If we utilize a net operating loss related to a closed year, the amount of the net operating loss may still be adjusted by the taxing authority. We have not reduced any tax benefit on our financial statements due to uncertain tax positions as of June 30, 2018 and we are not aware of any circumstance that would significantly change this result through the end of fiscal year 2020. To the extent we incurincome-tax related penalties or interest, we will recognize them as additional income tax expense.

Note 12. Selected Quarterly Financial Information (Unaudited)

The following table presents our unaudited quarterly results of operations for the years ended June 30, 2019 and 2018 (in thousands, except per share amounts).

	Quarters Ended												Year Ended
	June 30, 2019			March 31, 2019			December 31, 2018			September 30, 2018			June 30, 2019
Total revenues	$	1,129		$	1,249		$	2,049		$	488		$	4,915
Net income (loss) (1)	$	3,052		$	(17,354	)	$	12,025		$	(14,542	)	$	(16,819	)
Basic income (loss) per share	$	0.04		$	(0.24	)	$	0.17		$	(0.21	)	$	(0.24	)
Diluted loss per share	$	(0.15	)	$	(0.24	)	$	(0.15	)	$	(0.21	)	$	(0.75	)
	Quarters Ended												Year Ended
	June 30, 2018			March 31, 2018			December 31, 2017			September 30, 2017			June 30, 2018
Total revenues	$	548		$	433		$	358		$	283		$	1,622
Net income (loss) (1)	$	(19,253	)	$	(5,948	)	$	(6,079	)	$	(8,788	)	$	(40,068	)
Basic income (loss) per share	$	(0.36	)	$	(0.16	)	$	(0.16	)	$	(0.24	)	$	(0.97	)
Diluted income (loss) per share	$	(0.36	)	$	(0.16	)	$	(0.16	)	$	(0.24	)	$	(0.97	)

(1) We have experienced large changes in our net income (loss) which relates to the change in fair value of the warrant liability for the years ended June 30, 2019 and 2018. Refer to Note 1 for further discussion.

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Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

Item 9A.Controls and Procedures

(a) Disclosure Controls and Procedures

At the end of the period covered by this Annual Report on Form10-K, our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by an issuer in the reports that it files or submits under the Exchange Act is accumulated and communicated to the issuer’s management, including its principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. Based on that evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures are effective to ensure that the information required to be disclosed by the Company in reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms.

A control system no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues, if any, within the Company are detected. Accordingly, our disclosure controls and procedures are designed to provide reasonable, not absolute, assurance that the objectives of our disclosure control system are met and, as set forth above, our Chief Executive Officer and Chief Financial Officer have concluded, based on their evaluation as of the end of the period covered by this Annual Report on Form10-K, that our disclosure controls and procedures were effective to provide reasonable assurance that the objectives of our disclosure control system were met.

(b) Management’s Annual Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a—15(f) under the Exchange Act. Our internal control was designed to provide reasonable assurance to our management and Board of Directors regarding the preparation and fair presentation of published financial statements. All internal control systems, no matter how well designed, have inherent limitations. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation.

Management maintains a comprehensive system of controls intended to ensure that transactions are executed in accordance with management’s authorization, assets are safeguarded and financial records are reliable. Management also takes steps to ensure that information and communication flows are effective, and to monitor performance, including performance of internal control procedures.

Management assessed the effectiveness of our internal control over financial reporting as of June 30, 2019, based on the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission in Internal Control-Integrated Framework (2013 Framework). Based on this assessment, management believes that our internal control over financial reporting is effective as of June 30, 2019.

There were no changes in internal control over financial reporting during the quarter ended June 30, 2019, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

The effectiveness of our internal control over financial reporting as of June 30, 2019 has been audited by BDO USA, LLP, an independent registered public accounting firm, as stated in their report which is included herein.

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Report of Independent Registered Public Accounting Firm

Board of Directors and Stockholders

MEI Pharma, Inc.

San Diego, California

Opinion on Internal Control over Financial Reporting

We have audited MEI Pharma, Inc. (the “Company’s”) internal control over financial reporting as of June 30, 2019, based on criteria established inInternal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (the COSO criteria). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of June 30, 2019, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the balance sheets of the Company as of June 30, 2019 and 2018, and the related statements of operations, stockholders’ equity, and cash flows for each of the three years in the period ended June 30, 2019, and the related notes and our report dated August 28, 2019 expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying, Item 9A, Management’s Annual Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit of internal control over financial reporting in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ BDO USA, LLP

San Diego, California

August 28, 2019

Item 9B. Other Information

Not applicable.

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PART III

Item 10. Directors, Executive Officers and Corporate Governance

Code of Ethics

We have adopted a Code of Business and Ethics policy that applies to our directors and employees (including our principal executive officer and our principal financial officer), and have posted the text of our policy on our website (www.meipharma.com). In addition, we intend to promptly disclose (i) the nature of any amendment to the policy that applies to our principal executive officer and principal financial officer and (ii) the nature of any waiver, including an implicit waiver, from a provision of the policy that is granted to one of these specified individuals, the name of such person who is granted the waiver and the date of the waiver on our website in the future.

The other information required by this item is incorporated herein by reference to our proxy statement for the fiscal year ended June 30, 2019 (the “Proxy Statement”).

Item 11. Executive Compensation

The information required by this item is incorporated herein by reference to the Proxy Statement.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information required by this item is incorporated herein by reference to the Proxy Statement.

Item 13. Certain Relationships and Related Transactions, and Director Independence

The information required by this item is incorporated herein by reference to the Proxy Statement.

Item 14. Principal Accountant Fees and Services.

The information required by this item is incorporated herein by reference to the Proxy Statement.

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PART IV

Item 15. Exhibits, Financial Statement Schedules

(a) 1. Financial Statements

Reference is made to the Financial Statements under Item 8 in Part II hereof.

2. Financial Statement Schedules

The Financial Statement Schedules have been omitted either because they are not required or because the information has been included in the financial statements or the notes thereto included in this Annual Report on Form10-K.

3. Exhibits

Exhibit Index

3.1	Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1 to the Registrant’s Quarterly Report on Form10-Q filed on February 7, 2019 (FileNo. 000-50484)).
3.5	Certificate of Designation of Series A Convertible Preferred Stock of Marshall Edwards, Inc. (incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form8-K filed on May 11, 2011 (FileNo. 000-50484))
3.6	Certificate of Designation of Series B Preferred Stock of Marshall Edwards, Inc. (incorporated by reference to Exhibit 4 to Exhibit 10.1 to the Registrant’s Current Report on Form8-K filed on March 18, 2011 (FileNo. 000-50484))
3.7	Second Amended and Restated Bylaws (incorporated by reference to Exhibit 3.1 to the Registrant’s Quarterly Report on Form10-Q filed on May 4, 2017 (FileNo. 000-50484)).
4.1	Specimen Stock Certificate (incorporated by reference to Exhibit 4.1 to Amendment No.  1 to the Registrant’s Registration Statement on FormS-1 filed on October 31, 2003 (Reg.No. 333-109129)).
4.2	Form of Warrant (incorporated by reference to Exhibit B to Exhibit 10.1 to the Registrant’s Current Report on Form8-K filed on May 16, 2018 (FileNo. 000-50484)).
10.1	Employment letter dated April  23, 2010, between Marshall Edwards, Inc. and Daniel Gold (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form8-K filed on April 26, 2010 (FileNo. 000-50484)).
10.2	Employment letter dated June  1, 2011, between Marshall Edwards, Inc. and Robert D. Mass (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form8-K filed on June 2, 2011 (FileNo. 000-50484)).
10.3	Employment letter dated March  6, 2014, between MEI Pharma, Inc. and David M. Urso (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form8-K filed on April 8, 2014 (FileNo. 000-50484)).
10.4	Amendment No. 1, dated July 12, 2018, to the Employment Letter dated March  6, 2014, between MEI Pharma, Inc. and David M. Urso. (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form8-K filed on July 16, 2018 (FileNo. 000-50484)).
10.5	Employment letter dated February  1, 2017, between MEI Pharma, Inc. and Brian G. Drazba (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form8-K filed on April 3, 2017 (FileNo. 000-50484)).
10.6	MEI Pharma, Inc. Amended and Restated 2008 Stock Omnibus Equity Compensation Plan (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form10-Q filed on November 30, 2018 (FileNo. 000-50484)).
10.7	Form of Indemnification Agreement (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form8-K filed on August 29, 2011 (FileNo. 000-50484)).
10.8	Asset Purchase Agreement, dated as of August  7, 2012, between MEI Pharma, Inc. and S*Bio Pte Ltd. (incorporated by reference to Exhibit 2.1 to the Registrant’s Current Report on Form8-K filed on August 8, 2012 (FileNo. 000-50484)).
��10.9**	License Agreement, dated September  28, 2012, between Cydex Pharmaceuticals, Inc. and the Company (incorporated by reference to Exhibit 10.1 to the Registrant’s Quarterly Report on Form10-Q filed on November 13, 2012 (FileNo. 000-50484)).
10.10**	Supply Agreement, dated September  28, 2012, between Cydex Pharmaceuticals, Inc. and the Company (incorporated by reference to Exhibit 10.2 to the Registrant’s Quarterly Report on Form10-Q filed on November 13, 2012 (FileNo. 000-50484)).
10.11**	License, Development and Commercialization Agreement, dated August  5, 2016, by and between the Company and Helsinn Healthcare SA (incorporated by reference to Exhibit 10.1 to Amendment No. 1 to the Registrant’s Quarterly Report on Form10-Q/A filed on February  16, 2017 (File No.000-50484)).

56

10.12	Common Stock Purchase Agreement, dated as of August  5, 2016, by and between MEI Pharma, Inc. and Helsinn Investment Fund SA (incorporated by reference to Exhibit 10.2 to the Registrant’s Quarterly Report on Form10-Q filed on November 9, 2016 (FileNo. 000-50484)).
10.13**	License Agreement, dated as of September  5, 2017, by and between MEI Pharma, Inc. and Presage Biosciences, Inc. (incorporated by reference to Exhibit 10.1 to the Registrant’s Quarterly Report on Form10-Q filed on November 8, 2017 (FileNo. 000-50484)).
10.14	At-The-Market Equity Offering Sales Agreement, dated November 8, 2017 between MEI Pharma, Inc. and Stifel, Nicolaus & Company, Inc. (incorporated by reference to Exhibit 1.1 to the Registrant’s Current Report on Form8-K filed on November 8, 2017 (FileNo. 000-50484)).
10.15	Securities Purchase Agreement, dated May  11, 2018, between MEI Pharma, Inc. and the purchasers identified in Exhibit A therein (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form8-K filed on May  16, 2018 (FileNo. 000-50484)).
17**	License, Development and Commercialization Agreement, dated as of October  31, 2018, by and between the Company and Kyowa Hakko Kirin Co., Ltd., now known as Kyowa Kirin Company (incorporated by reference to Exhibit 10.1 to the Registrant’s Quarterly Report on Form10-Q filed on February 7, 2019 (FileNo. 000-50484)).
23.1	Consent of Independent Registered Accounting Firm*
31.1	Certification of Chief Executive Officer pursuant to Rule13a-14(A) promulgated under the Securities Exchange Act of 1934*
31.2	Certification of Chief Financial Officer pursuant to Rule13a-14(A) promulgated under the Securities Exchange Act of 1934*
32.1	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section  1350 and Rule13a-14(B) promulgated under the Securities Exchange Act of 1934*
101.INS	XBRL Instance Document*
101.SCH	XBRL Taxonomy Extension Schema Document*
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document*
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document*
101.LAB	XBRL Taxonomy Extension Label Linkbase Document*
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document*

(*) Filed herewith.

(**) Portions of this exhibit have been redacted pursuant to a confidential treatment request filed with the Securities and Exchange Commission.

Item 16. Form10-K Summary

None.

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Exchange Act, the registrant has duly caused this Annual Report on Form10-K to be signed on its behalf by the undersigned, thereunto duly authorized, on August 28, 2019.

MEI PHARMA, INC.

A Delaware Corporation

By:

/s/ Daniel P. Gold

Daniel P. Gold

Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this Annual Report on Form10-K has been signed below by the following persons on behalf of the registrant and in the capacities indicated on August 28, 2019.

Signatures		Title
By:	/s/ Daniel P. Gold Daniel P. Gold	President, Chief Executive Officer and Director (Principal Executive Officer)
By:	/s/ Brian G. Drazba Brian G. Drazba	Secretary, Chief Financial Officer (Principal Financial and Accounting Officer)
By:	/s/ Christine A. White Christine A. White	Chairman
By:	/s/ William D. Rueckert William D. Rueckert	Director
By:	/s/ Charles V. Baltic III Charles V. Baltic III	Director
By:	/s/ Thomas C. Reynolds Thomas C. Reynolds	Director
By:	/s/ Nicholas R. Glover Nicholas R. Glover	Director
By:	/s/ Kevan E. Clemens Kevan E. Clemens	Director
By:	/s/ Frederick W. Driscoll Frederick W. Driscoll	Director
By:	/s/ Tamar D. Howson Tamar D. Howson	Director

58