8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of report (Date of earliest event reported): November 9, 2018

WAVE LIFE SCIENCES LTD.

(Exact name of registrant as specified in its charter)

Singapore	001-37627	Not Applicable
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)
7 Straits View #12-00 Marina One East Tower Singapore		018936
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code: +65 6236 3388

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

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

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

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

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

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

Emerging growth company  ☒

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

Item 2.02 Results of Operations and Financial Condition.

On November 9, 2018, Wave Life Sciences Ltd. (the “Company”) announced its financial results for the quarter ended September 30, 2018. The full text of the press release issued in connection with the announcement is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference herein.

Item 7.01 Regulation FD Disclosure.

From time to time, the Company presents and/or distributes slides and presentations to the investment community to provide updates and summaries of its business. On November 9, 2018, the Company updated its corporate presentation, which is available on the “For Investors & Media” section of the Company’s website at http://ir.wavelifesciences.com/. This presentation is also furnished as Exhibit 99.2 to this Current Report on Form 8-K.

The information in this Current Report on Form 8-K furnished pursuant to Items 2.02 and 7.01 shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. It may only be incorporated by reference in another filing under the Exchange Act or the Securities Act of 1933, as amended, if such subsequent filing specifically references the information furnished pursuant to Items 2.02 and 7.01 of this Current Report on Form 8-K.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits relating to Items 2.02 and 7.01 shall be deemed to be furnished and not filed:

Exhibit No.	Document
99.1	Press Release issued by Wave Life Sciences Ltd. dated November 9, 2018
99.2	Corporate Presentation of Wave Life Sciences Ltd. dated November 9, 2018

SIGNATURE

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

	WAVE LIFE SCIENCES LTD.
Date: November 9, 2018	/s/ Keith C. Regnante
	Keith C. Regnante Chief Financial Officer

EX-99.1

Exhibit 99.1

Wave Life Sciences Reports Third Quarter 2018 Financial Results and Provides Business Update

CAMBRIDGE, Mass., November 9, 2018 – Wave Life Sciences Ltd. (NASDAQ: WVE), a biotechnology company focused on delivering transformational therapies for patients with serious, genetically-defined diseases, today announced financial results for the third quarter ended September 30, 2018 and provided a business update.

“During the third quarter we maintained strong momentum in advancing our three clinical programs and expect to announce our company’s first clinical readout later this year when we share topline safety results from the Phase 1 trial for WVE-210201, our investigational exon 51 skipping candidate for the treatment of Duchenne muscular dystrophy,” said Paul Bolno, MD, MBA, President and Chief Executive Officer of Wave Life Sciences. “Beyond our ongoing clinical programs, we spent much of the last quarter focused on expanding our discovery efforts into inherited retinal diseases and urgently driving additional Duchenne muscular dystrophy programs, including WVE-N531, our investigational exon 53 skipping candidate.”

Third Quarter Highlights and Business Updates

• WVE-210201 DMD exon 51 skipping program

Wave expects to announce topline safety data from its Phase 1 clinical trial evaluating WVE-210201 in Duchenne muscular dystrophy (DMD) patients amenable to exon 51 skipping by the end of the fourth quarter of 2018. As patients complete the Phase 1 trial, they have the option to enroll in an ongoing open-label extension study in which they continue to receive WVE-210201.

In addition, the company remains on track to deliver an interim analysis of dystrophin expression in muscle biopsies from its ongoing open-label extension study in the second half of 2019.

Wave has designed a global, pivotal, placebo-controlled Phase 2/3 efficacy and safety clinical trial of WVE-210201 in DMD patients amenable to exon 51 skipping, informed by ongoing discussions with regulatory authorities and the DMD patient community. The study will be powered to assess clinical efficacy and will include dystrophin expression readouts as part of interim and final analyses.

• WVE-N531 DMD exon 53 skipping program and additional DMD exon skipping programs

Wave is leveraging learnings from its ongoing DMD development and discovery efforts to advance WVE-N531, its preclinical program to target DMD in boys amenable to exon 53 skipping. Recent data presented at the 23^rd International Annual Congress of the World Muscle Society demonstrated that WVE-N531 induced up to 71% dystrophin protein restoration in vitro in DMD patient-derived myoblasts compared with healthy human myoblasts as measured by Western Blot. Subject to submission of clinical trial applications and approval to proceed, Wave expects to deliver topline clinical data for WVE-N531 in the second half of 2020.

The company is also expanding its DMD discovery programs to explore additional exon targets beyond its current exon 51 and exon 53 skipping programs, specifically including exons 44, 45, 52, 54 and 55.

• Pipeline expansion to rare, genetic eye diseases

Last month, Wave announced plans to design and advance stereopure oligonucleotide therapeutics for the potential treatment of inherited retinal diseases. Wave’s research in ophthalmology is assessing four inherited retinal diseases, which typically begin in childhood or adolescence and commonly lead to progressive vision loss: retinitis pigmentosa due to a P23H mutation in the RHO gene, Stargardt disease, Usher syndrome type 2A and Leber congenital amaurosis 10.

Wave’s decision to expand its therapeutic pipeline into ophthalmology is supported by its data presented at the 14th Annual Meeting of the Oligonucleotide Therapeutics Society in October 2018. The data demonstrate that a single intravitreal injection of stereopure oligonucleotide in the eye of non-human primates resulted in greater than 95% knockdown of a target RNA in the retina for at least four months. Based on these data, the company is working to design development candidates that could achieve a therapeutic effect with only two doses per year.

Wave expects to announce its first ophthalmology development candidate in the second half of 2019.

• PRECISION-HD Phase 1b/2a clinical trials

The PRECISION-HD program, which consists of two global Phase 1b/2a clinical trials evaluating investigational therapies WVE-120101 and WVE-120102 for patients with Huntington’s disease, remains on track to deliver topline data in the first half of 2019. An open-label extension study to assess safety, tolerability and efficacy using validated clinical outcome measures is planned for patients as they complete the ongoing Phase 1b/2a trials.

• Continued validation of Wave’s stereochemistry platform

Wave shared advancements related to its novel stereochemistry platform at the 14th Annual Meeting of the Oligonucleotide Therapeutics Society in October 2018. The company’s latest findings provide further validation of Wave’s platform to precisely design, optimize and manufacture stereopure oligonucleotides. Presentations included preclinical data demonstrating that Wave’s stereochemical control of antisense oligonucleotides enhances target efficacy and enables broad tissue distribution and exposure.

Third Quarter 2018 Financial Results and Financial Guidance

Wave reported a net loss of $37.6 million in the third quarter of 2018 as compared to $25.5 million in the same period in 2017. The increase in net loss in the third quarter of 2018 was largely driven by increased research and development efforts to support achievement of Wave’s corporate goals.

Research and development expenses were $32.9 million in the third quarter of 2018 as compared to $20.1 million in the same period in 2017. The increase in research and development expenses in the third quarter of 2018 was primarily due to increases in research, preclinical and clinical activities, further expansion of our manufacturing capabilities and facility-related expenses, and related organizational growth to support Wave’s advancing and expanding pipeline.

General and administrative expenses were $9.8 million in the third quarter of 2018 as compared to $7.6 million in the same period in 2017. The increase in general and administrative expenses in the third quarter of 2018 was mainly driven by the increase in employee headcount, as well as increases in professional services and other general operating expenses.

Wave ended the third quarter of 2018 with $210.5 million in cash and cash equivalents as compared to $142.5 million as of December 31, 2017. The increase in cash and cash equivalents was primarily the result of the $170.0 million of cash received from Takeda, which was partially offset by Wave’s year-to-date net loss of $108.8 million.

Wave expects that its existing cash and cash equivalents, together with expected and committed cash from existing collaborations, will enable it to fund its operating and capital expenditure requirements to the end of 2020.

About Wave Life Sciences

Wave Life Sciences is a biotechnology company focused on delivering transformational therapies for patients with serious, genetically-defined diseases. Its chemistry platform enables the creation of highly specific, well-characterized oligonucleotides designed to deliver superior efficacy and safety across multiple therapeutic modalities. The company’s pipeline is initially focused on neurological disorders and extends across several other therapeutic areas. For more information, please visit www.wavelifesciences.com.

Forward-Looking Statements

This press release contains forward-looking statements concerning our goals, beliefs, expectations, strategies, objectives and plans, and other statements that are not necessarily based on historical facts, including statements regarding the following, among others: the anticipated commencement, patient enrollment, data readouts and completion of our clinical trials, and the announcement of such events; the protocol, design and endpoints of our ongoing and planned clinical trials; the future performance and results of our programs in clinical trials; future preclinical activities and programs; the progress and potential benefits of our collaborations with partners; the potential of our in vitro and in vivo preclinical data to predict the behavior of our compounds in humans in clinical trials; our identification of future candidates and their therapeutic potential; the anticipated therapeutic benefits of our potential therapies compared to others; our advancing of therapies across multiple modalities and the anticipated benefits of that model; the anticipated benefits of our manufacturing process and our internal manufacturing facility; our future growth; the potential benefits of our stereopure compounds compared with stereorandom compounds, our drug discovery platform and nucleic acid therapeutics generally; the strength of our intellectual property; and the anticipated duration of our cash runway. Actual results may differ materially from those indicated by these forward-looking statements as a result of various important factors, including the following: our ability to finance our drug discovery and development efforts and to raise additional capital when needed; the ability of our preclinical programs to produce data sufficient to support our clinical trial applications and the timing thereof; our ability to continue to build and maintain the company infrastructure and personnel needed to achieve our goals; the clinical results of our programs, which may not support further development of product candidates; actions of regulatory agencies, which may affect the initiation, timing and progress of clinical trials; our effectiveness in managing future clinical trials and regulatory processes; the success of our platform in identifying viable candidates; the continued development and acceptance of nucleic acid therapeutics as a class of drugs; our ability to demonstrate the therapeutic benefits of our candidates in clinical trials, including our ability to develop candidates across multiple therapeutic modalities; our dependence on third parties, including our collaborators and partners; our ability to manufacture drug material to support our programs and growth; our ability to obtain, maintain and protect intellectual property; our ability to enforce our patents against infringers and defend our patent portfolio against challenges from third parties; and competition from others developing therapies for similar uses, as well as the information under the caption “Risk Factors” contained in our most recent Annual Report on Form 10-K filed with the Securities and Exchange Commission ( SEC ) and in other filings we make with the SEC from time to time. We undertake no obligation to update the information contained in this press release to reflect subsequently occurring events or circumstances.

WAVE LIFE SCIENCES LTD.

UNAUDITED CONSOLIDATED BALANCE SHEETS

(In thousands, except share amounts)

	September 30, 2018			December 31, 2017
Assets
Current assets:
Cash and cash equivalents	$	210,489		$	142,503
Current portion of accounts receivable		10,000			1,000
Prepaid expenses and other current assets		12,672			6,985
Total current assets		233,161			150,488
Long-term assets:
Accounts receivable, net of current portion		50,000			—
Property and equipment, net		37,722			27,334
Restricted cash		3,620			3,610
Other assets		74			411
Total long-term assets		91,416			31,355
Total assets	$	324,577		$	181,843
Liabilities, Series A preferred shares and shareholders’ equity
Current liabilities:
Accounts payable	$	11,961		$	7,598
Accrued expenses and other current liabilities		9,518			8,898
Current portion of capital lease obligation		—			16
Current portion of deferred rent		90			60
Current portion of deferred revenue		103,229			1,275
Current portion of lease incentive obligation		997			344
Total current liabilities		125,795			18,191
Long-term liabilities:
Deferred rent, net of current portion		5,084			4,214
Deferred revenue, net of current portion		69,494			7,241
Lease incentive obligation, net of current portion		8,229			3,094
Other liabilities		1,495			1,619
Total long-term liabilities		84,302			16,168
Total liabilities	$	210,097		$	34,359
Series A preferred shares, no par value; 3,901,348 shares issued and outstanding at September 30, 2018 and December 31, 2017	$	7,874		$	7,874
Shareholders’ equity:
Ordinary shares, no par value; 29,426,176 and 27,829,079 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively	$	374,502		$	310,038
Additional paid-in capital		33,757			22,172
Accumulated other comprehensive income		181			116
Accumulated deficit		(301,834	)		(192,716	)
Total shareholders’ equity	$	106,606		$	139,610
Total liabilities, Series A preferred shares and shareholders’ equity	$	324,577		$	181,843

WAVE LIFE SCIENCES LTD.

UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(In thousands, except share and per share amounts)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Revenue	$	4,493		$	1,315		$	10,794		$	2,795
Operating expenses:
Research and development		32,876			20,097			94,619			53,940
General and administrative		9,849			7,571			26,755			20,088
Total operating expenses		42,725			27,668			121,374			74,028
Loss from operations		(38,232	)		(26,353	)		(110,580	)		(71,233	)
Other income (expense), net:
Dividend income		1,064			515			2,354			1,287
Interest income (expense), net		5			1			16			5
Other income (expense), net		(468	)		(75	)		(384	)		(211	)
Total other income (expense), net		601			441			1,986			1,081
Loss before income taxes		(37,631	)		(25,912	)		(108,594	)		(70,152	)
Income tax benefit (provision)		—			418			(172	)		(1,035	)
Net loss	$	(37,631	)	$	(25,494	)	$	(108,766	)	$	(71,187	)
Net loss per share attributable to ordinary shareholders—basic and diluted	$	(1.28	)	$	(0.92	)	$	(3.78	)	$	(2.73	)
Weighted-average ordinary shares used in computing net loss per share attributable to ordinary shareholders—basic and diluted		29,333,994			27,758,792			28,804,357			26,078,696
Other comprehensive income (loss):
Net loss	$	(37,631	)	$	(25,494	)	$	(108,766	)	$	(71,187	)
Foreign currency translation		(20	)		1			65			19
Comprehensive loss	$	(37,651	)	$	(25,493	)	$	(108,701	)	$	(71,168	)

Investor Contact:

Graham Morrell

781-686-9600

gmorrell@wavelifesci.com

Media Contact:

José Juves

617-949-4708

jjuves@wavelifesci.com

Patient Contact:

Wendy Erler

617-949-2898

werler@wavelifesci.com

EX-99.2

Wave Life Sciences Corporate Presentation November 9, 2018 Exhibit 99.2

Forward-looking statements This document contains forward-looking statements. All statements other than statements of historical facts contained in this document, including statements regarding possible or assumed future results of operations, preclinical and clinical studies, business strategies, research and development plans, collaborations and partnerships, regulatory activities and timing thereof, competitive position, potential growth opportunities, use of proceeds and the effects of competition are forward-looking statements. These statements involve known and unknown risks, uncertainties and other important factors that may cause the actual results, performance or achievements of Wave Life Sciences Ltd. (the “Company”) to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements. In some cases, you can identify forward-looking statements by terms such as “may,” “will,” “should,” “expect,” “plan,” “aim,” “anticipate,” “could,” “intend,” “target,” “project,” “contemplate,” “believe,” “estimate,” “predict,” “potential” or “continue” or the negative of these terms or other similar expressions. The forward-looking statements in this presentation are only predictions. The Company has based these forward-looking statements largely on its current expectations and projections about future events and financial trends that it believes may affect the Company’s business, financial condition and results of operations. These forward-looking statements speak only as of the date of this presentation and are subject to a number of risks, uncertainties and assumptions, including those listed under Risk Factors in the Company’s Form 10-K and other filings with the SEC, some of which cannot be predicted or quantified and some of which are beyond the Company’s control. The events and circumstances reflected in the Company’s forward-looking statements may not be achieved or occur, and actual results could differ materially from those projected in the forward-looking statements. Moreover, the Company operates in a dynamic industry and economy. New risk factors and uncertainties may emerge from time to time, and it is not possible for management to predict all risk factors and uncertainties that the Company may face. Except as required by applicable law, the Company does not plan to publicly update or revise any forward-looking statements contained herein, whether as a result of any new information, future events, changed circumstances or otherwise.

Wave Life Sciences is a clinical-stage, genetic medicines company unlocking the potential of a proprietary chemistry platform that enables the precise design, optimization and production of stereopure nucleic acid therapies. We are leading a new era of precision medicine in which rationally designed nucleic acid therapies are the key to delivering safer, more effective treatments for serious, genetically defined diseases.

Architects of transformation Wave has reinvented the design, synthesis and manufacture of nucleic acid therapies to potentially optimize potency, durability and safety PRECISION Ability to design nucleic acid compounds that have one defined and consistent profile SCALE Platform potential across multiple modalities and tissues Internal expertise and capacity for large-scale GMP manufacturing Wave’s chemistry platform is built on a foundation of two core capabilities:

WAVE RATIONAL DESIGN Stereochemistry enables precise control, ability to optimize critical constructs into one defined and consistent profile Building the optimal, stereopure medicine STANDARD OLIGONUCLEOTIDE APPROACHES Pharmacologic properties include >500,000 permutations in every dose Impact: Unreliable therapeutic effects Unintended off-target effects Impact: Potential for safer, more effective, targeted medicines that can address difficult-to-treat diseases

Source: Iwamoto N, et al. Control of phosphorothioate stereochemistry substantially increases the efficacy of antisense oligonucleotides. Nat Biotechnol. 2017;35:845-851. Creating a new class of oligonucleotides INDICATION, TARGET TRANSCRIPT, PRODUCT PROFILE SPLICING RNAi ANTISENSE DEFINE MODALITY DESIGN & OPTIMIZE VALIDATE SEQUENCE STEREOCHEMISTRY CHEMISTRY Free uptake in cellular models Animal models POTENCY STABILITY SPECIFICITY IMMUNE POTENCY DURABILITY TOXICOLOGY Candidates

Optimizing potency and durability across multiple tissues CNS Muscle Liver MALAT1 Transcript Knockdown in Mice Knockdown of Serum hAPOC3 Protein Levels in Mice Two 5 mg/kg SC injections on Days 1&3 PBS Stereopure Eye MALAT1 Knockdown in Non-Human Primates Single 450 µg IVT injection 10 Weeks after single 100 µg ICV injection DMD: Percent Skipped Transcript in mdx23 Mice Stereorandom Stereopure Single 150 mg/kg IV injection Data represented in this slide from in vivo studies. CNS: PBS = phosphate buffered saline; Ctx = cortex; Str = striatum; Cb = cerebellum; Hp = hippocampus; SC = spinal cord. ICV = intracerebral; IVT = intravitreal; IV = intravenous; SC= subcutaneous. Retina Gastrocnemius MALAT1 Transcript Knockdown (% of control)

Stereochemistry allows for Human TLR9 activation assay with 5mC modified CpG containing MOE gapmer Cytokine induction in human PBMC assay Stereochemistry affects immune activation Complement Activation Human TLR9 Activation Cytokine Induction Complement activation in non-human primate serum assay Data represented in this slide from in vitro studies. MOE = 2′-O-methoxyethylribose; PBMC = peripheral blood mononuclear cell; TLR9 = toll-like receptor 9. Stereorandom Stereopure Stereorandom Stereopure

MUSCLE Pipeline spanning multiple modalities, novel targets CLINICAL CANDIDATE DISCOVERY ESTIMATED U.S. PREVALENCE* TARGET MECHANISM PARTNER WAVE’S COMMERCIAL RIGHTS CNS A Huntington’s disease ~10k / ~35k mHTT SNP1 Phase 1b/2a Takeda 50% Global A Huntington’s disease ~10k / ~35k mHTT SNP2 Phase 1b/2a Takeda 50% Global A Amyotrophic lateral sclerosis ~1,800 C9orf72 Takeda 50% Global A Frontotemporal dementia ~7,000 C9orf72 Takeda 50% Global S Spinocerebellar ataxia 3 ATXN3 Takeda 50% Global ~4,500 CNS diseases Multiple† Takeda Milestones & Royalties OPHTHALMOLOGY HEPATIC S Metabolic liver diseases APOC3 and Multiple (4)‡ Pfizer Milestones & Royalties *Estimates of U.S. prevalence and addressable population by target based on publicly available data and are approximate; for Huntington’s disease, numbers approximate manifest and pre-manifest populations, respectively. † During a four-year term, Wave and Takeda may collaborate on up to six preclinical targets at any one time. ‡Pfizer has nominated four undisclosed targets in addition to APOC3. E = exon skipping. A = allele-specific silencing. S = silencing. E Duchenne muscular dystrophy ~2,000 Exon 51 Phase 1/OLE — 100% Global E Duchenne muscular dystrophy ~1,250 Exon 53 — 100% Global Duchenne muscular dystrophy Exons 44, 45, 52, 54, 55 — 100% Global Retinal diseases RHO, USH2A, ABCA4, CEP290 — 100% Global Neuromuscular diseases Multiple — 100% Global ~1,500 E ~10,000 OLE = Open-label extension.

Duchenne Muscular Dystrophy (DMD)

DMD: a progressive, fatal childhood disorder Fatal, X-linked genetic neuromuscular disorder characterized by progressive, irreversible loss of muscle function, including heart and lung Genetic mutation in dystrophin gene prevents the production of dystrophin protein, a critical component of healthy muscle function Symptom onset in early childhood; one of the most serious genetic diseases in children worldwide Current disease modifying treatments have demonstrated minimal dystrophin expression and clinical benefit has not been established Impacts 1 in every 5,000 newborn boys each year; 20,000 new cases annually worldwide Neuro DMD Source: Parent Project Muscular Dystrophy. About Duchenne & Becker muscular dystrophy. Available at: https://www.parentprojectmd.org/care/for-healthcare-providers/. Accessed: November 2, 2018.

Wave approach: stereopure exon skipping oligonucleotide Neuro DMD Exon skipping with stereopure oligonucleotides has the potential to enable production of meaningful levels of functional dystrophin Enabling production of meaningful levels of dystrophin is expected to result in therapeutic benefit Initial patient populations are those amenable to Exon 51 and Exon 53 skipping DISRUPTED READING FRAME DYSFUNCTIONAL RESTORED READING FRAME FUNCTIONAL

WVE-210201 Phase 1 clinical trial Global, multicenter, double-blind, randomized, placebo-controlled, single ascending dose study with intravenous administration Primary endpoint: Safety and tolerability Inclusion criteria: ages 5 to 18, amenable to Exon 51 skipping Ambulatory and non-ambulatory boys eligible, including those previously treated with eteplirsen and ataluren (following appropriate washout period) Readout expected Q4 2018 Open-label extension (OLE) study underway To include up to 40 patients previously in the Phase 1 clinical trial Quarterly clinical assessments using validated clinical outcome measures Muscle biopsies and interim analysis with measurement of dystrophin expression via standardized Western Blot WVE-210201 planned efficacy and safety clinical trial Double-blind, placebo-controlled, multi-dose study assessing dystrophin expression and clinical outcomes Clinical assessments using validated clinical outcome measures over 48 weeks followed by enrollment into OLE Muscle biopsies and interim analysis with measurement of dystrophin expression via standardized Western Blot Exon 51: WVE-210201 clinical program Neuro DMD Dystrophin readout expected H2 2019

Exon 51: improved skipping efficiency RNA skipping determined by quantitative RT-PCR Wave isomers demonstrated a dose-dependent increase in skipping efficiency in vitro Free uptake at 10uM concentration of each compound with no transfection agent  Same foundational stereopure chemistry for Wave isomers; individually optimized to select candidate Neuro DMD Dose Response on Skipping Efficiency (mRNA, in vitro) (4 days)

Dystrophin protein restoration in vitro was quantified to be between 50-100% of normal skeletal muscle tissue lysates, as compared to about 1% by drisapersen and eteplirsen analogs Exon 51: increased dystrophin restoration *Analogs dystrophin (400-427 kDa) vinculin (120 kDa) Marker Mock Drisapersen* Eteplirsen* WVE-210201 WV-isomer 2 WV-isomer 3 Skeletal Muscle Tissue lysates Marker 0 µM Skeletal Muscle Tissue (2 fold less lysate) 0.1 µM 0.3 µM 1 µM 3 µM 10 µM Skeletal Muscle Tissue dystrophin (400-427 kDa) vinculin (120 kDa) Experimental conditions: DMD protein restoration by Western Blot in patient-derived myotubes with clear dose effect. Free uptake at 10 µM concentration of each compound with no transfection agent. WVE-210201 Neuro DMD

Exon 51: in vivo target engagement of WVE-210201 in healthy non-human primate 5 doses @ 30 mg/kg /week for 4 weeks healthy NHP by subcutaneous dosing Nested PCR Assay Neuro DMD Experimental conditions: Muscle tissues were collected 2 days after the last dose and fresh frozen.  Total RNAs were extracted with phenol/chloroform and converted to cDNA using high capacity kit.  Nested PCR assay was performed and analyzed by fragment analyzer.

Exon 51: no apparent tissue accumulation observed Standard oligonucleotides tend to accumulate in liver and kidney Wave rationally designed oligonucleotides optimized to allow compound to clear more effectively WVE-210201 demonstrated wide tissue distribution in dose dependent fashion No apparent accumulation observed after multiple doses Single in vivo I.V. dose at 30 mpk in MDX 23 mice Neuro DMD Experimental conditions: Oligo quantifications in tissues were performed using hybridization ELISA assay

Exon 53: WVE-N531 in vitro dose-dependent dystrophin restoration Free uptake for 6 days in differentiation media with no transfection agent and no peptide conjugated to the oligonucleotide Wave stereopure Exon 53 candidate demonstrated a dose-dependent increase in dystrophin restoration in DMD patient-derived myoblasts Experimental conditions: D45-52 patient myoblasts were treated with oligonucleotide for 6d under free-uptake conditions in differentiation media. Protein harvested in RIPA buffer and dystrophin restoration analyzed by Western Blot. Signal normalized to vinculin loading control and to primary healthy human myotube lysate (pooled from four donors) forming a standard curve in d45-52 cell lysate. Neuro DMD Interim dystrophin data readout expected in H2 2020 Dystrophin protein restoration of up to 71% Western Blot normalized to primary healthy human myoblast lysate

Exon 53: targeting oligonucleotide rapidly distributes to muscle within 24 hours after injection Bright field view 63x oil Nucleus: Hematoxylin; Light Blue Wave oligo: ViewRNA, Fast Red Nucleus: Hoechst33342; Blue Wave oligo: Fast Red/Cy3; Pink Red Fluorescence channel view Z Stack view Data derived from in vivo preclinical research. Experimental conditions: A single dose of stereopure oligonucleotide 30 mg/kg IV was administered to mdx 23 mice. Tissues collected 24 hours post dose and ASO was detected in muscles using ViewRNA. Neuro DMD

Stereopure surrogate yields substantial dystrophin protein restoration and CK reduction *Numbers indicate individual animals Note: DMD-1742 is a stereopure oligonucleotide designed to induce exon 23 skipping in the mdx23 mouse model and is a surrogate of WVE-210201, which is designed to induce exon 51 skipping in the human dystrophin transcript Experimental conditions: Tissues collected 96 hours post final dose. Protein expression determined by Western Blot. ALT=alanine aminotransferase; AST=aspartate aminotransferase; CK=creatine kinase; GLDH=glutamate dehydrogenase. Serum and plasma clinical chemistry were measured with an Olympus AU640 (Olympus America) and the manufacturer’s reagents and procedures. Neuro DMD 80% 60% 40% 20% 10% 5% 2.5% # 1 #2 #3 #1 #2 #3 #4 #5 #5* Dystrophin Meta-vinculin Vinculin Wild Type/PBS Pool PBS DMD-1742 Gastrocnemius DMD-1742 (4 weekly 150-mg/kg IV injections)     Dystrophin Protein Restoration 70-90% of dystrophin restoration Multiple Doses (in vivo mdx23 mice) Serum Enzyme Levels 87% reduction in creatine kinase (CK) levels

Single dose of surrogate results in restoration of dystrophin in muscle fibers Neuro DMD PBS DMD-1742 Immunohistochemistry of dystrophin in gastrocnemius in mdx23 mice at 4 weeks 10X Experimental conditions: mdx23 mice received a single IV injection of PBS or DMD-1742 (150 mg/kg). Immunohistochemistry: Blue: Nuclei, Hoechest; Yellow: Rabbit anti-Dystrophin(#ab15277) 1:400 diluent, 555/Cy3, Cy3 staining is represented by the yellow color. 10X magnification. PBS

Multiple doses of surrogate result in further restoration of dystrophin in muscle fibers Experimental conditions: mdx23 mice received 4 weekly IV injections of PBS or DMD-1742 (150 mg/kg). Immunohistochemistry: Blue: Nuclei, Hoechest; Yellow: Rabbit anti-Dystrophin(#ab15277) 1:400 diluent, 555/Cy3, Cy3 staining is represented by the yellow color. 10X magnification. Neuro DMD PBS DMD-1742 Immunohistochemistry of dystrophin in gastrocnemius in mdx23 mice at 4 weeks 10X 0X

Huntington’s Disease

Huntington’s Disease: a hereditary, fatal disorder Sources: Auerbach W, et al. Hum Mol Genet. 2001;10:2515-2523. Dragatsis I, et al. Nat Genet. 2000;26:300-306. Leavitt BR, et al. J Neurochem. 2006;96:1121-1129. Nasir J, et al. Cell. 1995;81:811-823. Reiner A, et al. J Neurosci. 2001;21:7608-7619. White JK, et al. Nat Genet. 1997;17:404-410. Zeitlin S, et al. Nat Genet. 1995;11:155-163. Carroll JB, et al. Mol Ther. 2011;19:2178-2185. Huntington Disease Society of America (HDSA). What is Huntington’s disease? Available at: http://hdsa.org/what-is-hd/. Accessed: November 2, 2018. DNA CAG Repeat RNA wildtype (healthy) allele RNA mutant allele Normal CAG Repeat Expanded CAG Repeat Healthy protein (HTT) Mutant protein (mHTT) Neuro HD Autosomal dominant disease, characterized by cognitive decline, psychiatric illness and chorea; fatal No approved disease-modifying therapies Expanded CAG triplet repeat in HTT gene results in production of mutant huntingtin protein (mHTT); accumulation of mHTT causes progressive loss of neurons in the brain Wildtype (healthy) HTT protein critical for neuronal function; suppression may have detrimental long-term consequences 30,000 people with Huntington’s disease in the US; another 200,000 at risk of developing the condition

Utilize association between single nucleotide polymorphisms (SNPs) and genetic mutations to specifically target errors in genetic disorders, including HD Allele-specificity possible by targeting SNPs associated with expanded long CAG repeat in mHTT gene Approach aims to lower mHTT transcript while leaving healthy HTT relatively intact Potential to provide treatment for up to 70% of HD population (either oligo alone could address approximately 50% of HD population) Wave approach: novel, allele-specific silencing expanded CAG repeat SNP 1 ~50% of patients SNP 2 ~50% of patients ~20% of patients may carry both SNP1 AND SNP 2 Source: Kay, et al. Personalized gene silencing therapeutics for Huntington disease. Clin Genet. 2014;86:29–36. Total: Due to overlap, an estimated ~70% of the total HD patient population carry SNP 1 and/or SNP 2 Neuro HD

Two simultaneous Phase 1b/2a clinical trials Neuro HD PRECISION-HD is a global clinical program consisting of the PRECISION-HD1 trial evaluating WVE-120101 targeting SNP1 and the PRECISION-HD2 trial evaluating WVE-120102 targeting SNP2 Two parallel, multicenter, double-blind, randomized, placebo-controlled Phase 1b/2a clinical trials for WVE-120101 and WVE-120102, administered intrathecally, with single-ascending dose and multiple-ascending dose portions Primary objective: Assess safety and tolerability of intrathecal doses in early manifest HD patients Key additional objectives: Measurement of total HTT and mHTT; exploratory pharmacokinetic (PK), pharmacodynamic (PD), clinical and MRI endpoints Key inclusion criteria: age ≥25 to ≤65, stage I or II HD who have screened positively for the presence of SNP1 or SNP2 Expected to enroll approximately 50 patients per trial Open-label extension (OLE) study planned to allow for continued dosing and clinical assessments To include patients previously in the Phase 1b/2a clinical trials Assessments of safety, tolerability, PK, PD, MRI and efficacy using validated clinical outcome measures Intend to explore efficacy in early manifest and pre-manifest HD patient populations Phase 1b/2a readout expected H1 2019

Selective reduction of mHTT mRNA & protein Reporter Cell Line* Neuro HD Source: Meena, Zboray L, Svrzikapa N, et al. Selectivity and biodistribution of WVE-120101, a potential antisense oligonucleotide therapy for the treatment of Huntington’s disease. Paper presented at: 69th Annual Meeting of the American Academy of Neurology; April 28, 2017; Boston, MA.

Demonstrated delivery to brain tissue WVE-120101 and WVE-120102 distribution in cynomolgus non-human primate brain following intrathecal bolus injection Demonstrated delivery to brain tissue In Situ Hybridization ViewRNA stained tissue Red dots are WVE-120102 oligonucleotide. Arrow points to nuclear and perinuclear distribution of WVE-120102 in caudate nucleus Red dots are WVE-120101 oligonucleotide. Arrow points to nuclear and perinuclear distribution of WVE- 120101 in cingulate cortex CIC = cingulate cortex In Situ Hybridization ViewRNA stained tissue  Neuro HD CN = caudate nucleus Source: Meena, Zboray L, Svrzikapa N, et al. Selectivity and biodistribution of WVE-120101, a potential antisense oligonucleotide therapy for the treatment of Huntington’s disease. Paper presented at: 69th Annual Meeting of the American Academy of Neurology; April 28, 2017; Boston, MA.

C9orf72 Amyotrophic Lateral Sclerosis (ALS) Frontotemporal Dementia (FTD)

C9orf72: a critical genetic risk factor C9orf72 gene provides instructions for making protein found in various tissues, with abundance in nerve cells in the cerebral cortex and motor neurons C9orf72 genetic mutations are the strongest genetic risk factor found to date for the more common, non-inherited (sporadic) forms of Amyotrophic Lateral Sclerosis (ALS) and Frontotemporal Dementia (FTD); GGGGCC repeat drives the formation and accumulation of dipeptide repeat proteins that accumulate in brain tissue First pathogenic mechanism identified to be a genetic link between familial (inherited) ALS and FTD Most common mutation identified associated with familial ALS and FTD Availability of dipeptide biomarker in CSF has potential to accelerate drug development expanded GGGGCC repeat hexanucleotide repeat transcript Neuro C9orf72 Source: DeJesus-Hernandez M, Mackenzie IR, Boeve BF, et al. Neuron. 2011;72:245-256. Renton AE, Majounie E, Waite A, et al. Neuron. 2011;72:257-268.

Amyotrophic lateral sclerosis Neurodegenerative disease characterized by the progressive degeneration of motor neurons in the brain and spinal cord Affects approximately 15,000-20,000 people in the US with a median survival of three years C9orf72 is present in approximately 40% of familial ALS and 8-10% of sporadic ALS; currently the most common demonstrated mutation related to ALS, far more so than SOD1 or TDP-43 Pathogenic transcripts of the C9orf72 gene contain hundreds to thousands of hexanucleotide repeats compared to 2-23 in wild-type transcripts; dominant trait with high penetrance Topline data expected in H2 2020 Source: Renton AE, Chiò A, Traynor BJ. State of play in amyotrophic lateral sclerosis genetics. Nat Neurosci. 2014;17:17–23. Neuro C9orf72 ~40% ~8-10% ~10% ~90%

Frontotemporal dementia Progressive neuronal atrophy with loss in the frontal and temporal cortices characterized by personality and behavioral changes, as well as gradual impairment of language skills Affects approximately 55,000 people in the US Second most common form of early-onset dementia after Alzheimer’s disease in people under the age of 65 Up to 50% of FTD patients have a family history of dementia, many inheriting FTD as an autosomal dominant trait with high penetrance Pathogenic transcripts of the C9orf72 gene contain hundreds to thousands of hexanucleotide repeats compared to 2-23 in wild-type transcripts Neuro C9orf72 ~38% ~6% Sources: Stevens M, et al. Familial aggregation in frontotemporal dementia. Neurology. 1998;50:1541-1545. Majounie E, et al. Frequency of the C9orf72 hexanucleotide repeat expansion in patients with amyotrophic lateral sclerosis and frontotemporal dementia: a cross-sectional study. Lancet Neurol. 2012;11:323-330. 10% - 50% 50% - 90% Topline data expected in H2 2020

Selective silencing in vivo of expanded C9orf72 repeat transcripts Wave has developed a series of highly optimized antisense compounds which selectively silence the repeat containing transcript in C9orf72 transgenic mice These compounds show target engagement across cell types and regions of the nervous system critically implicated in ALS and FTD Neuro C9orf72 Experimental description: Samples were analyzed using quantitative PCR (Taqman assay) WVE-3972-01 WVE-3972-01

WVE-3972-01 produces durable reduction in dipeptides in vivo Neuro C9orf72 PolyGP (Relative expression, means+SEM) Spinal Cord Cortex Durable reduction of dipeptide in spinal cord and cortex in C9-BAC mice for at least 12 weeks Stereopure Stereopure Stereorandom Stereorandom Experimental design: C9-BAC mice received a single ICV injection of PBS or oligonucleotide (100 mg). WVE-3972-01 Stereorandom

NHP = non-human primate. Experimental design: Cynomolgus monkeys were administered 3 weekly IT doses of ASO; tissues were collected 48 hours after last injection. WVE-3972-01 in nuclei of neurons in NHP CNS Blue: Nuclear, Hematoxylin; Pink Red: ASO/ViewRNA, Fast Red/Cy3 Spinal cord: Oligonucleotide visualization (ViewRNA) after intrathecal delivery in NHPs Frontal Cortex: Oligonucleotide visualization (ViewRNA) after intrathecal delivery in NHPs Neuro C9orf72 Widespread and sustained distribution in nuclei of neurons in spinal cord and frontal cortex

Ophthalmology

Building a portfolio for inherited retinal diseases Rare eye disorders caused by genetic mutations leading to progressive vision loss No approved therapies for almost all IRDs Approximately 200,000 affected in the U.S. and millions world-wide RHO P23H Retinitis pigmentosa ~1,800 USH2A Usher syndrome 2A ~5,000 ABCA4 Stargardt disease ~2,000 CEP290 Leber congenital amaurosis 10 ~1,000 Inherited retinal diseases (IRDs) Genetic target Inherited retinal disease US Population Addressable by Wave Approach Oligonucleotides allow for intravitreal (IVT) injection; targeting twice a year dosing Stereopure oligonucleotides open up novel strategies in both dominant and recessive IRDs; potential for potent and durable effect with low immune response Established imaging markers, easily identifiable patient population and historical ophthalmology trial success rates suggest clear path to market Wave opportunity Initial candidate expected in H2 2019 150 µg PBS Broad Distribution One Week Post-Dose PBS Single IVT injection of stereopure oligonucleotide to NHP results in distribution throughout all layers of the retina and potent, extended duration of effect 1 week 2 months 4 months SP ASO >95% Knockdown in Retina Tissue Sources: Daiger S, et al.  Clin Genet. 2013;84:132-141. Wong CH, et al. Biostatistics. 2018; DOI: 10.1093/biostatistics/kxx069. Athanasiou D, et al. Prog Retin Eye Res. 2018;62:1–23. Daiger S, et al. Cold Spring Harb Perspect Med. 2015;5:a017129. Verbakel S, et al. Prog Retin Eye Res. 2018:66:157-186. MALAT1 oligonucleotide detected using ViewRNA assay; pink = oligonucleotide Ophthalmology

Partnerships

*Assuming Takeda advances six programs that achieve regulatory approval and commercial sales, Wave will be eligible to receive up to $2 billion in cash milestone payments, of which more than $1 billion would be in precommercial milestone payments. $230+ million in committed cash; eligible for milestones and royalties in excess of $2 billion* Takeda option on global 50:50 share of CNS programs in HD, ALS, FTD and SCA3 Fully funded CNS R&D with Takeda right to license additional preclinical CNS targets over four years Collaborating to maximize portfolio and platform Platform technologies $40 million upfront payment; $871 million in potential milestone payments and royalties Advancing 5 targets, including APOC3, for the treatment of metabolic liver diseases Leveraging Wave proprietary chemistry platform across modalities with GalNAc and Pfizer’s hepatic targeting technology Applying artificial intelligence to discover novel therapies for genetic neuromuscular disorders Utilizing 3D imaging to assess target engagement in specific regions, cell types and subcellular compartments of the brain

Intellectual property strength: breadth and depth of patent portfolio Programs HD candidates DMD candidates Platform Designs Compositions Stereochemistry Process development Improved activity, stability, specificity, immunogenicity Oligonucleotide compositions Monomers, key reagents Methods of synthesis ALS, FTD candidates

Upcoming Wave catalysts Q4 2018: Safety data expected in DMD from Phase 1 trial for WVE-210201 WVE-210201 is the first stereopure oligonucleotide targeting Exon 51 H1 2019: Data expected in HD from Phase 1b/2a trials for WVE-120101 and WVE-120102 Potential to be first two allele-specific disease-modifying therapies selectively lowering mHTT H2 2019: Interim dystrophin data readout expected in DMD for WVE-210201 H2 2019: Initial development candidate for inherited retinal disease H2 2020: Anticipate filing an NDA and pursuing accelerated approval for WVE-210201 in Exon 51 amenable DMD Interim dystrophin data readout expected in DMD for WVE-N531 targeting Exon 53 Topline data expected from WVE-3972-01 C9orf72 programs

Realizing the potential of nucleic acid therapeutics For more information: Graham Morrell, Investor Relations gmorrell@wavelifesci.com 781.686.9600