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): January 12, 2026

HARMONY BIOSCIENCES HOLDINGS, INC.

(Exact name of registrant as specified in its charter)

Delaware	001-39450	82-2279923
(State or other jurisdiction	(Commission	(IRS Employer
of incorporation)	File Number)	Identification No.)

630 W. Germantown Pike, Suite 215

Plymouth Meeting, PA 19462

(Address of principal executive offices) (Zip Code)

(484) 539-9800

(Registrant’s telephone number, including area code)

N/A

(Former name or former address, if changed since last report.)

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:

☐ 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))

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

	Trading	Name of each exchange
Title of each class	Symbol(s)	on which registered
Common Stock, $0.00001 par value per share	HRMY	The Nasdaq Global Market

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 January 12, 2026, Harmony Biosciences Holdings, Inc. (the “Company”) issued a press release announcing its preliminary unaudited net product revenue for the fourth quarter and year ended December 31, 2025. In addition, the Company provided guidance related to 2026 net product revenue and provided an update on clinical programs. A copy of this press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

Item 7.01. Regulation FD Disclosure.

The Company will also be presenting at the 44^th Annual JP Morgan Healthcare Conference on January 13, 2026. The presentation is attached as Exhibit 99.2 to this Current Report on Form 8-K and is incorporated herein by reference.

This Current Report on Form 8-K and its contents (including Exhibits 99.1 and 99.2) are furnished and shall not be deemed “filed” for 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 or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended (the “Securities Act”), nor shall it be deemed incorporated by reference in any filing under the Securities Act or the Exchange Act, regardless of any general incorporation language in such filing, except as shall be expressly set forth by specific reference in such filing.

Note Regarding Forward-Looking Statements

Certain statements in this Current Report on Form 8-K constitute “forward-looking statements” within the meaning of the federal securities laws. These statements are based on management’s current opinions, expectations, beliefs, plans, objectives, assumptions or projections regarding future events or future results. These forward looking statements are only predictions, not historical fact, and involve certain risks and uncertainties, as well as assumptions. Actual results, levels of activity, performance, achievements and events could differ materially from those stated, anticipated or implied by such forward-looking statements. While the Company believes that its assumptions are reasonable, it is very difficult to predict the impact of known factors, and, of course, it is impossible to anticipate all factors that could affect actual results. There are many risks and uncertainties that could cause actual results to differ materially from the forward-looking statements made herein including the risks discussed under the heading “Risk Factors” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024, which was filed with the Securities and Exchange Commission (“SEC,”) on February 25, 2025, as well as other factors described from time to time in the Company’s filings with the SEC. Such forward-looking statements are made only as of the date of this Current Report on Form 8-K. The Company undertakes no obligation to publicly update or revise any forward-looking statement because of new information, future events or otherwise, except as otherwise required by law. If it does update one or more forward-looking statements, no inference should be made that the Company will make additional updates with respect to those or other forward-looking statements.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

Exhibit
No.	Description
99.1*	Press release issued by the Company, dated January 12, 2026.
99.2*	Harmony Biosciences Holdings, Inc. 44th Annual JP Morgan Healthcare Conference Presentation, January 13, 2026.
104	Cover Page Interactive Data File (embedded within the Inline XBRL document).

* This Exhibit is furnished herewith and will not be deemed “filed” for purposes of Section 18 of the Exchange Act or deemed to be incorporated by reference into any filing under the Exchange Act or the Securities Act except to the extent that Harmony Biosciences Holdings, Inc. specifically incorporates it by reference.

SIGNATURES

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.

	HARMONY BIOSCIENCES HOLDINGS, INC.
Date: January 12, 2026	By:	/s/ Sandip Kapadia
		Sandip Kapadia
		Chief Financial Officer and Chief Administrative Officer

EX-99.1

Exhibit 99.1

HARMONY BIOSCIENCES GUIDES TO OVER $1 BILLION IN WAKIX® REVENUE IN 2026; ADVANCING ROBUST LATE-STAGE PIPELINE WITH POTENTIAL FOR LONG- TERM VALUE CREATION

WAKIX 2025 Preliminary Net Revenue of ~$868 Million; 2026 WAKIX Net Revenue Guidance of $1.0 – $1.04 Billion on Track for Blockbuster Status in Narcolepsy

On Track to Extend the Pitolisant Franchise into the 2040s With Next Gen Pitolisant Formulations

Potential Best-In-Class Orexin-2 Agonist (BP1.15205) Phase 1 Trial Ongoing; Clinical Data Expected in Mid-2026

Robust Late-Stage Pipeline with Five Ongoing Phase 3 Registrational Clinical Trials in Five Distinct CNS Indications

PLYMOUTH MEETING, Pa., Jan. 12, 2026 /Businesswire/ -- Harmony Biosciences Holdings, Inc. (Nasdaq: HRMY) today announced strong preliminary, unaudited net product revenue for Q4 and full year 2025 of approximately $243 million and $868 million, respectively. The company continues to build on six consecutive years of revenue growth. On track to extend the pitolisant franchise, Harmony fortifies its profile as a profitable, self-funding biotech company with a robust, late-stage pipeline and strong long-term growth potential. Harmony will highlight its commercial performance and pipeline advancements at its presentation at the 44th Annual J.P. Morgan Healthcare Conference on Tuesday, January 13, 2026, at 4:30 p.m. PT / 7:30 p.m. ET in San Francisco, CA.

“With WAKIX on track to achieve revenue of over $1 billion in narcolepsy in 2026, Harmony is entering its next phase of growth with significant momentum,” said Jeffrey M. Dayno, M.D., President and CEO of Harmony Biosciences. “Our proven commercial engine is driving exceptional performance with WAKIX, our next-gen formulations are positioned to extend and expand the pitolisant franchise well into the 2040s, and we continue to advance our late-stage pipeline with five ongoing Phase 3 registrational trials toward five distinct CNS indications. As a

profitable, self-funding biotech with a strong balance sheet, we are well positioned to build out our pipeline and expand our commercial portfolio to drive long-term value creation.”

Fourth Quarter and Full Year 2025 Net Product Revenue for WAKIX (Preliminary and Unaudited)

· Preliminary, unaudited net product revenue for the quarter ended December 31, 2025, was approximately $243 million, compared to $201.3 million for the same period in 2024

· Increase of ~400 patients to achieve ~8,500 average number of patients in Q4 2025; representing the third consecutive quarter of ~400+ patient adds

· Preliminary, unaudited net product revenue for the full year ended December 31, 2025, was approximately $868 million, compared to $714.7 million for the full year ended December 31, 2024, representing ~21% growth year on year

Pitolisant Franchise Strategy

· WAKIX: On track to achieve blockbuster status in narcolepsy

o Net revenue projected between $1.0 billion to $1.04 billion for the full year ending December 31, 2026

o Pitolisant in Prader-Willi Syndrome (PWS)

§ Phase 3 topline data readout in 2H 2026

§ Supports Pediatric Exclusivity for WAKIX: Fulfils the last regulatory requirement for six months of additional regulatory exclusivity on top of the longest patent for WAKIX

· Pitolisant GR (gastro-resistant): On track to extend pitolisant franchise into the 2040s

o NDA submission in 2Q 2026; anticipated PDUFA date in 1Q 2027

§ Approximately 80-90% of patients with narcolepsy experience GI symptoms; pitolisant GR is designed to minimize the worsening of these symptoms

§ Ability to initiate treatment at therapeutic dose with no titration

o Utility patents filed to extend franchise to the 2040s

· Pitolisant HD (high dose): Opportunity to expand pitolisant franchise with differentiated indications

o Phase 3 registrational clinical trials ongoing in narcolepsy (ONSTRIDE 1) and idiopathic hypersomnia (ONSTRIDE 2)

§Topline data in 2027; anticipated PDUFA date in 2028

§ Enhanced formulation with optimized PK profile, GR coating and higher dose to drive greater efficacy

§Differentiated indications: fatigue in narcolepsy and sleep inertia in IH

o Utility patents filed to expand franchise to the 2040s

Robust Pipeline

· Orexin-2 receptor agonist (BP1.15205)

o First subject dosed in Phase 1 PK trial in Q4 2025

o Phase 1 clinical PK data in mid-2026

o Potential best-in-class orexin-2 receptor agonist based on a novel chemical scaffold,preclinicalpotency,selectivity,safetyandefficacydata,andpotential for once-a-day dosing

· EPX-100 (clemizole hydrochloride)

o Oneofthemostadvanceddevelopmentprogramsinthe5HT2(serotonin) agonist class

o EnrollmentongoingforPhase3registrationaltrialinDravetsyndrome(ARGUS Study) with topline data anticipated in 1H 2027

§ SafetyandeffectivenessdatafromtheopenlabelextensionstudyinDS was presented at AES meeting in December 2025

o Enrollment ongoing for Phase 3 registrational trial in patients with Lennox- Gastautsyndrome(LIGHTHOUSEStudy)withtoplinedataanticipatedin1H2027

ZYN002 Update

· After an in-depth review of the data from the RECONNECT study, the ZYN002 program in Fragile X syndrome is being phased out and Harmony is no longer pursuing a 22q deletion syndrome indication.

Additional business updates to be provided during the Management presentation at the upcoming J.P. Morgan Healthcare Conference on January 13, 2026, at 4:30 p.m. PT / 7:30 p.m. ET. Presentation slides are available on the investor page of the Harmony Biosciences website: https://ir.harmonybiosciences.com/

About Preliminary Financial Results

The preliminary results set forth above have not been audited or reviewed by our auditor, are based on management’s initial review of the Company’s results for the quarter and the year ended December 31, 2025, and are subject to revision based upon the Company’s quarter-end and year-end closing procedures and the completion and external review by our auditor of the Company’s quarter-end and year-end financial statements. Actual results may differ materially from these preliminary results following the completion of quarter-end and year-end closing procedures, final adjustments or other developments arising between now and the time that the Company’s financial results are finalized. In addition, these preliminary results are not a comprehensive statement of the Company’s financial results for the quarter and the year ended December 31, 2025, should not be viewed as a substitute for full financial statements prepared in accordance with generally accepted accounting principles, and are not necessarily indicative of the Company’s results for any future period.

About WAKIX® (pitolisant) Tablets

WAKIX, a first-in-class medication, is approved by the U.S. Food and Drug Administration for the treatment of excessive daytime sleepiness (EDS) or cataplexy in adult patients with narcolepsy and for the treatment of EDS in pediatric patients 6 years of age and older with narcolepsy. It was granted orphan drug designation for the treatment of narcolepsy in 2010, and breakthrough therapy designation for the treatment of cataplexy in 2018. WAKIX is a selective histamine 3 (H₃) receptor antagonist/inverse agonist. The mechanism of action of WAKIX is

unclear; however, its efficacy could be mediated through its activity at H₃ receptors, thereby increasing the synthesis and release of histamine, a wake promoting neurotransmitter. WAKIX was designed and developed by Bioprojet (France). Harmony has an exclusive license from Bioprojet to develop, manufacture and commercialize pitolisant in the United States.

Indications and Usage

WAKIX is indicated for the treatment of excessive daytime sleepiness (EDS) or cataplexy in adult patients with narcolepsy and for the treatment of excessive daytime sleepiness (EDS) in pediatric patients 6 years of age and older with narcolepsy.

Important Safety Information Contraindications

WAKIX is contraindicated in patients with known hypersensitivity to pitolisant or any component of the formulation. Anaphylaxis has been reported. WAKIX is also contraindicated in patients with severe hepatic impairment.

Warnings and Precautions

WAKIX prolongs the QT interval; avoid use of WAKIX in patients with known QT prolongation or in combination with other drugs known to prolong the QT interval. Avoid use in patients with a history of cardiac arrhythmias, as well as other circumstances that may increase the risk of the occurrence of torsade de pointes or sudden death, including symptomatic bradycardia, hypokalemia or hypomagnesemia, and the presence of congenital prolongation of the QT interval.

The risk of QT prolongation may be greater in patients with hepatic or renal impairment due to higher concentrations of pitolisant; monitor these patients for increased QTc. Dosage modification is recommended in patients with moderate hepatic impairment and moderate or severe renal impairment. WAKIX is contraindicated in patients with severe hepatic impairment and not recommended in patients with end-stage renal disease (ESRD).

Adverse Reactions

In the placebo-controlled clinical trials conducted in patients with narcolepsy with or without cataplexy, the most common adverse reactions (≥5% and at least twice placebo) for WAKIX were insomnia (6%), nausea (6%), and anxiety (5%). Other adverse reactions that occurred at ≥2% and more frequently than in patients treated with placebo included headache, upper respiratory tract infection, musculoskeletal pain, heart rate increased, hallucinations, irritability, abdominal pain, sleep disturbance, decreased appetite, cataplexy, dry mouth, and rash. In the placebo-controlled phase of the clinical trial conducted in pediatric patients 6 years and older with narcolepsy with or without cataplexy, the most common adverse reactions (≥5% and greater than placebo) for WAKIX were headache (19%) and insomnia (7%). The overall adverse reaction profile of WAKIX in the pediatric clinical trial was similar to that seen in the adult clinical trial program.

Drug Interactions

Concomitant administration of WAKIX with strong CYP2D6 inhibitors increases pitolisant exposure by 2.2-fold. Reduce the dose of WAKIX by half. Concomitant use of WAKIX with strong CYP3A4 inducers decreases exposure of pitolisant by 50%. Dosage adjustments may be required. H1 receptor antagonists that cross the blood-brain barrier may reduce the effectiveness of WAKIX. Patients should avoid centrally acting H1 receptor antagonists. WAKIX is a borderline/weak inducer of CYP3A4. WAKIX may reduce the effectiveness of sensitive CYP3A4 substrates, including hormonal contraceptives. Patients using hormonal contraception should be advised to use an alternative non-hormonal contraceptive method during treatment with WAKIX and for at least 21 days after discontinuing treatment.

Use in Specific Populations

There is a pregnancy exposure registry that monitors pregnancy outcomes in women who are exposed to WAKIX during pregnancy. Patients should be encouraged to enroll in the WAKIX pregnancy registry if they become pregnant. To enroll or obtain information from the registry, patients can call 1-800-833-7460. The safety and effectiveness of WAKIX have not been established for treatment of excessive daytime sleepiness in pediatric patients less than 6 years of age with narcolepsy. The safety and effectiveness of WAKIX have not been established for treatment of cataplexy in pediatric patients with narcolepsy. WAKIX is extensively metabolized by the liver. WAKIX is contraindicated in patients with severe hepatic impairment. Dosage adjustment is required in patients with moderate hepatic impairment. WAKIX is not recommended in patients with end-stage renal disease. Dosage adjustment of WAKIX is recommended in patients with eGFR <60 mL/minute/1.73 m2. Dosage reduction is recommended in patients known to be poor CYP2D6 metabolizers; these patients have higher concentrations of WAKIX than normal CYP2D6 metabolizers. Please see the Full Prescribing Information for WAKIX for more information. To report suspected adverse reactions, contact Harmony Biosciences at 1-800-833-7460 or the FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

About Narcolepsy

Narcolepsy is a rare, chronic, debilitating neurological disease of sleep-wake state instability that impacts approximately 170,000 Americans and is primarily characterized by excessive daytime sleepiness (EDS) and cataplexy – its two cardinal symptoms – along with other manifestations of REM sleep dysregulation (hallucinations and sleep paralysis), which intrude into wakefulness. EDS is the inability to stay awake and alert during the day and is the symptom that is present in all people living with narcolepsy. In most patients, narcolepsy is caused by the loss of hypocretin/orexin, a neuropeptide in the brain that supports sleep-wake state stability. This disease affects men and women equally, with typical symptom onset in adolescence or young adulthood; however, it can take up to a decade to be properly diagnosed.

About Idiopathic Hypersomnia

Idiopathic Hypersomnia (IH) is a rare and chronic neurological disease that is characterized by excessive daytime sleepiness (EDS) despite sufficient or even long sleep time. EDS in IH cannot be alleviated by naps, longer sleep or more efficient sleep. People living with IH experience significant EDS along with the symptoms of sleep inertia (prolonged difficulty waking up from sleep) and 'brain fog' (impaired cognition, attention, and alertness). The cause of IH is unknown, but it is likely due to alterations in areas of the brain that stabilize states of sleep and wakefulness. IH is one of the central disorders of hypersomnolence and, like narcolepsy, is a debilitating sleep disorder that can result in significant disruption in daily functioning.

About ZYN002

ZYN002 is the first-and-only pharmaceutically manufactured synthetic cannabidiol devoid of THC and formulated as a patent-protected permeation-enhanced gel for transdermal delivery through the skin and into the circulatory system. The product is manufactured through a synthetic process in a cGMP facility and is not extracted from the cannabis plant. ZYN002 does not contain THC, the compound that causes the euphoric effect of cannabis, and has the potential to be a nonscheduled product if approved. Cannabidiol, the active ingredient in ZYN002, has been granted orphan drug designation by the United States Food and Drug Administration (FDA) and the European Medicines Agency (EMA) for the treatment of FXS and for the treatment of 22q. Additionally, ZYN002 has received FDA Fast Track designation for the treatment of behavioral symptoms in patients with FXS.

About Fragile X Syndrome

Fragile X syndrome (FXS) is a rare genetic disorder that is the leading known cause of both inherited intellectual disability and autism spectrum disorder. The disorder negatively affects synaptic function, plasticity and neuronal connections, and results in a spectrum of intellectual disabilities and behavioral symptoms, such as social avoidance and irritability. While the exact prevalence is unknown, upwards of 80,000 patients in the U.S. and 121,000 patients in the European Union and the UK are believed to have FXS, based on FXS prevalence estimates of approximately 1 in 4,000 to 7,000 in males and approximately 1 in 8,000 to 11,000 in females. There is a significant unmet medical need in patients living with FXS as there are currently no FDA-approved treatments for this disorder. FXS is caused by a mutation in FMR1, a gene which modulates a number of systems, including the endocannabinoid system, and most critically, codes for a protein called FMRP. The FMR1 mutation manifests as multiple repeats of a DNA segment, known as the CGG triplet repeat, resulting in deficiency or lack of FMRP. FMRP helps regulate the production of other proteins and plays a role in the development of synapses, which are critical for relaying nerve impulses, and in regulating synaptic plasticity. In people with full mutation of the FMR1 gene, the CGG segment is repeated more than 200 times, and in most cases causes the gene to not function. Methylation of the FMR1 gene also plays a role in determining functionality of the gene. In approximately 60% of patients with FXS, who have complete methylation of the FMR1 gene, no FMRP is produced, resulting in dysregulation of the systems modulated by FMRP.

About Clemizole Hydrochloride (EPX-100)

EPX-100, clemizole hydrochloride, is under development for the treatment of Dravet syndrome (DS) and Lennox-Gastaut syndrome (LGS). EPX-100 acts by targeting central 5- hydroxytryptamine receptors to modulate serotonin signaling. The drug candidate is administered orally twice a day in a liquid formulation and has been developed based on a proprietary phenotype-based zebrafish drug screening platform.DS is caused by a loss of function mutation in the SCN1A gene, and scn1 mutant zebrafish replicate the genetic etiology and phenotype observed in the majority of DS patients. The scn1Lab mutant zebrafish model that expresses voltage gated sodium channels has been used for high-throughput screening of compounds that modulate Nav1.1 in the central nervous system.

About Dravet Syndrome

Dravet syndrome (DS) is a severe and progressive epileptic encephalopathy that begins in infancy and causes significant impact on patient functioning. DS begins in the first year of life and is characterized by high seizure frequency and severity, intellectual disability, and a risk of sudden unexpected death in epilepsy. Approximately 85% of Dravet syndrome cases are caused by de novo loss-of-function (LOF) mutations in a voltage-gated sodium channel gene, SCN1A1. DS has an estimated incidence rate of 1:15,700.

About Lennox-Gastaut Syndrome

Lennox-Gastaut syndrome (LGS) is a rare and drug-resistant epileptic encephalopathy characterized by onset in children between 3-5 years of age. The underlying cause of LGS is unknown and can be related to a wide range of factors including genetic differences and structural differences in the brain.As a result, patients experience multiple seizure types, including atonic seizures, and developmental, cognitive, and behavioral issues. LGS affects approximately 48,000 patients in the U.S.

About Harmony Biosciences

Harmony Biosciences is a pharmaceutical company dedicated to developing and commercializing innovative therapies for patients with rare neurological diseases who have unmet medical needs. Driven by novel science, visionary thinking, and a commitment to those who feel overlooked, Harmony Biosciences is nurturing a future full of therapeutic possibilities that may enable patients with rare neurological diseases to truly thrive. Established by Paragon Biosciences, LLC, in 2017 and headquartered in Plymouth Meeting, Pa., we believe that when empathy and innovation meet, a better future can begin; a vision evident in the therapeutic innovations we advance, the culture we cultivate, and the community programs we foster. For more information, please visit www.harmonybiosciences.com.

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements contained in this press release that do not relate to matters of historical fact should be considered forward-looking statements, including statements regarding our full year 2026 net product revenue for WAKIX, expectations for the growth and value of WAKIX, plans to submit an NDA for pitolisant GR; plans to conduct

trials, collect or receive data, or continue investigating any of our product candidates or potential indications; our plans to extend the pitolisant franchise into the 2040s; our future results of operations and financial position, business strategy, products, prospective products, product approvals, the plans and objectives of management for future operations and future results of anticipated products. These statements are neither promises nor guarantees, but involve known and unknown risks, uncertainties and other important factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements, including, but not limited to, the following: our commercialization efforts and strategy for WAKIX and, if approved, our other product candidates; the rate and degree of market acceptance and clinical utility of pitolisant in additional indications, if approved, and any other product candidates we may develop or acquire, if approved; our research and development plans, including our efforts to explore the therapeutic potential of pitolisant in additional indications, including pitolisant GR and pitolisant HD; our ongoing and planned clinical trials; our ability to expand the scope of our license agreements with Bioprojet Société Civile de Recherche (“Bioprojet”); the availability of favorable insurance coverage and reimbursement for WAKIX and, if approved, our other product candidates; the timing of, and our ability to obtain, regulatory approvals for pitolisant for other indications, including pitolisant GR and pitolisant HD, as well as any other product candidates; our estimates regarding expenses, future revenue, capital requirements and additional financing needs; our ability to identify, acquire and integrate additional products or product candidates with significant commercial potential that are consistent with our commercial objectives; our commercialization, marketing and manufacturing capabilities and strategy; significant competition in our industry; our intellectual property position; loss or retirement of key members of management; failure to successfully execute our growth strategy, including any delays in our planned future growth; our failure to maintain effective internal controls; the impact of government laws and regulations; volatility and fluctuations in the price of our common stock; the significant costs and required management time as a result of operating as a public company; the fact that the price of Harmony's common stock may be volatile and fluctuate substantially; statements related to our intended share repurchases and repurchase timeframe and the significant costs and required management time as a result of operating as a public company. These and other important factors discussed under the caption "Risk Factors" in our Annual Report on Form 10-K filed with the Securities and Exchange Commission (the "SEC") on February 25, 2025 and our other filings with the SEC could cause actual results to differ materially from those indicated by the forward- looking statements made in this press release. Any such forward-looking statements represent management's estimates as of the date of this press release. While we may elect to update such forward-looking statements at some point in the future, we disclaim any obligation to do so, even if subsequent events cause our views to change.

Harmony Biosciences Investor Contact:

Matthew Beck 917-415-1750

matthew.beck@astrpartners.com

Harmony Biosciences Media Contact:

Cate McCanless 202-641-6086

cmccanless@harmonybiosciences.com

EX-99.2

Exhibit 99.2

Copyright © 2026 Harmony Biosciences. All rights reserved. 44th Annual J.P. Morgan Healthcare Conference JEFFREY M. DAYNO, MD January 13,2026 | San Francisco

Forward-Looking Statements This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements contained in this presentation that do not relate to matters of historical fact should be considered forward-looking statements, including statements regarding our full year 2026 net product revenue for WAKIX, expectations for the growth and value of WAKIX, plans to submit an NDA for pitolisant GR; plans to conduct trials, collect or receive data, or continue investigating any of our product candidates or potential indications; our plans to extend the pitolisant franchise into the 2040s; our future results of operations and financial position, business strategy, products, prospective products, product approvals, the plans and objectives of management for future operations and future results of anticipated products. These statements are neither promises nor guarantees, but involve known and unknown risks, uncertainties and other important factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements, including, but not limited to, the following: our commercialization efforts and strategy for WAKIX and, if approved, our other product candidates; the rate and degree of market acceptance and clinical utility of pitolisant in additional indications, if approved, and any other product candidates we may develop or acquire, if approved; our research and development plans, including our efforts to explore the therapeutic potential of pitolisant in additional indications, including pitolisant GR and pitolisant HD; our ongoing and planned clinical trials; our ability to expand the scope of our license agreements with Bioprojet Société Civile de Recherche (“Bioprojet”); the availability of favorable insurance coverage and reimbursement for WAKIX and, if approved, our other product candidates; the timing of, and our ability to obtain, regulatory approvals for pitolisant for other indications, including pitolisant GR and pitolisant HD, as well as any other product candidates; our estimates regarding expenses, future revenue, capital requirements and additional financing needs; our ability to identify, acquire and integrate additional products or product candidates with significant commercial potential that are consistent with our commercial objectives; our commercialization, marketing and manufacturing capabilities and strategy; significant competition in our industry; our intellectual property position; loss or retirement of key members of management; failure to successfully execute our growth strategy, including any delays in our planned future growth; our failure to maintain effective internal controls; the impact of government laws and regulations; volatility and fluctuations in the price of our common stock; the significant costs and required management time as a result of operating as a public company; the fact that the price of Harmony's common stock may be volatile and fluctuate substantially; statements related to our intended share repurchases and repurchase timeframe and the significant costs and required management time as a result of operating as a public company. These and other important factors discussed under the caption "Risk Factors" in our Annual Report on Form 10-K filed with the Securities and Exchange Commission (the "SEC") on February 25, 2025, and our other filings with the SEC could cause actual results to differ materially from those indicated by the forward-looking statements made in this presentation. Any such forward-looking statements represent management's estimates as of the date of this presentation. While we may elect to update such forward-looking statements at some point in the future, we disclaim any obligation to do so, even if subsequent events cause our views to change. 2 January 13, 2026 Harmony Biosciences | J.P. Morgan Healthcare Conference | All rights reserved.

5 STRONG FINANCIAL PROFILE PHASE 3 PROGRAMS ON TRACK FOR BLOCKBUSTER STATUS

PITOLISANT FRANCHISE STRATEGY

The Pitolisant Franchise: Grow, Extend and Expand Leadership by Addressing Unmet Patient Needs 1. Barateau et al., Dauvilliers, 2019; 2. Wang et al., 2023; 3. McCullough et al. Novel treatment options in narcolepsy, Chicago Rush Memorial Center - SLEEP 2019 Abstract; 4. Droogleever et al. (2012). Severe fatigue in narcolepsy with cataplexy. Sleep, 21(2), 163-169; * WAKIX attributes based on FDA-approved adult narcolepsy product labelling. Pitolisant GR Pitolisant HD NARCOLEPSY UNMET NEEDS WAKIX®* All other FDA-approved treatments are scheduled (CII – CIV) 100% Report GI disturbances 88% 1,2 Residual symptoms3 75% Report fatigue4 60% PRODUCT PROFILE 5 January 13, 2026 Harmony Biosciences | J.P. Morgan Healthcare Conference | All rights reserved. Strong efficacy in EDS, Cataplexy No titration; Start at therapeutic dose First and only non-scheduled treatment Gastro-resistant coating Higher dose, enhanced efficacy Established safety, tolerability Low drug-drug interactions Narcolepsy (with fatigue indication) IH (with sleep inertia indication) STRATEGY GROW “On Track for $1B+ in Narcolepsy Alone” EXTEND “New and previous patients” EXPAND “New, previous, and existing patients”

Extending and Expanding the Pitolisant Franchise to the Mid-2040s • Two meaningfully differentiated product profiles building off WAKIX with anticipated PDUFA dates prior to LOE; utility patents filed to 2044 • Pursuing other indications (fatigue in narcolepsy, sleep inertia in idiopathic hypersomnia) to drive greater differentiation, patient benefit and net revenue growth • On track to obtain pediatric exclusivity for WAKIX; additional six months of exclusivity (Q3 2030) WAKIX® (LOE Q1 2030) Approaching $1B+ foundation in narcolepsy alone PITOLISANT GR (ANTICIPATED PDUFA DATE Q1 2027) Potential to extend pitolisant franchise with utility patents filed to 2044 PITOLISANT HD (ANTICIPATED PDUFA DATE 2028, narcolepsy and IH) Potential to expand pitolisant patient base into new indications KEY TAKEAWAY Advancing Differentiated Products to Strengthen Leadership Position in Sleep/Wake 2019 2026 2028 2030 2040 6 January 13, 2026 Harmony Biosciences | J.P. Morgan Healthcare Conference | All rights reserved.

GROW EXTEND EXPAND PITOLISANT FRANCHISE STRATEGY

2026 Net Revenue Guidance $1.00B-1.04B 2026 NET REVENUE GUIDANCE WAKIX Net Revenue Growth 2020–2025 $160 $305 $438 $582 $715 $1B+ $0 $200 $400 $600 $800 $1,000 2020 2021 2022 2023 2024 2026 Guidance Net Revenue ($M) 20251 $868 On Track to Achieve $1B+ in Narcolepsy Alone 8 January 13, 2026 Harmony Biosciences | J.P. Morgan Healthcare Conference | All rights reserved. 1. Net Revenue for fiscal year 2025 is preliminary, unaudited and subject to change

WAKIX® Is One of the Most Successful Orphan/Rare Launches KEY TAKEAWAY After Six Years of Growth, Large Market Opportunity Remains 1. https://narcolepsynetwork.org/accessed Feb 2024 80,000 90,000 ~170,000 Diagnosed Narcolepsy Patients Undiagnosed Narcolepsy Population People Living With Narcolepsy in the U.S.1 > 50% of Patients Undiagnosed 9 January 13, 2026 Harmony Biosciences | J.P. Morgan Healthcare Conference | All rights reserved. Average Patients on WAKIX 400 300 300 100 400 300 300 200 350 350 350 150 250 250 300 100 400 500 400 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 Q2'21 Q3'21 Q4'21 Q1'22 Q2'22 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 Q4'23 Q1'24 Q2'24 Q3'24 Q4'24 Q1'25 Q2'25 Q3'25 Q4'25 Average # of Patients Net Patient Additions

Strong Commercial Engine Driving Continued Growth 10 January 13, 2026 Harmony Biosciences | J.P. Morgan Healthcare Conference | All rights reserved. Strong Foundation Recent Developments Implication Only non-scheduled treatment, unique MOA 6+ years clinical experience Unique & Familiar Many team members joined at launch Refined call plan, promo mix, messaging Trusted & Credible >80% lives covered, often advantaged New wins further expanding coverage Accessible Commercial model supports patients, enables broad data capture Added staff, proactive triage, recontact team Supportive DIFFERENTIATED PRODUCT EXPERIENCED TEAM BROAD PAYER ACCESS PATIENT SUPPORT INVESTMENT AND EXPANSION • In 2026, expanding field sales, field reimbursement and remote sales teams • Launching online portal and more Building Momentum

GROW EXTEND EXPAND PITOLISANT FRANCHISE STRATEGY

Pitolisant GR: Fast-To-Market Strategy Based on Demonstration of Bioequivalence to WAKIX® Formulation Q1 2027 Anticipated PDUFA Date POSITIVE PIVOTAL BIOEQUIVALENCE STUDY DOSING OPTIMIZATION STUDY COMPLETED 100% of the patients (46/46) able to initiate pitolisant GR at the therapeutic dose,17.8mg, without titration; No new safety or tolerability issues reported NDA SUBMISSION Q2 2026 ANTICIPATED PDUFA DATE Q1 2027 UTILITY PATENTS FILED TO EXTEND PITOLISANT FRANCHISE TO 2040s 12 January 13, 2026 Harmony Biosciences | J.P. Morgan Healthcare Conference | All rights reserved.

GROW EXTEND EXPAND PITOLISANT FRANCHISE STRATEGY

Pitolisant HD: Enhanced Formulation, Differentiated Product Profile ENHANCED FORMULATION WITH OPTIMIZED PK PROFILE AND HIGHER DOSE Designed to address the need for greater efficacy in excessive daytime sleepiness (EDS) in patients with central disorders of hypersomnolence PROGRAMS TO PURSUE A DIFFERENTIATED LABEL Fatigue in narcolepsy; sleep inertia in IH PHASE 3 REGISTRATIONAL TRIALS INITIATED IN Q4 2025 Topline data readouts anticipated in 2027; PDUFA dates anticipated 2028 UTILITY PATENTS FILED TO EXPAND PITOLISANT FRANCHISE INTO 2040s 2027 Phase 3 Topline Data • Narcolepsy (ONSTRIDE 1) • IH (ONSTRIDE 2) 14 January 13, 2026 Harmony Biosciences | J.P. Morgan Healthcare Conference | All rights reserved.

ROBUST PIPELINE

Innovative Late-Stage Pipeline PRODUCT INDICATION PRECLINICAL PHASE 1 PHASE 2 PHASE 3 REGULATORY FILING MARKETED PRODUCT WAKIX® EDS in Narcolepsy (Adults) Cataplexy in Narcolepsy (Adults) EDS in Narcolepsy (Pediatric) Prader-Willi Syndrome (PWS) Pitolisant Pitolisant Gastro-Resistant (GR) in Narcolepsy (Adults) Pitolisant High-Dose (HD) in Narcolepsy (Adults) Pitolisant High-Dose (HD) in Idiopathic Hypersomnia (Adults) Pitolisant High-Dose (HD) in Myotonic Dystrophy (DM1) BP1.15205 (Orexin-2 Receptor Agonist) Sleep/Wake Disorders CBS105 Treatment-Resistant Narcolepsy HBS-102 PWS EPX-100 (Clemizole Hydrochloride Dravet Syndrome (DS) Lennox-Gastaut Syndrome (LGS) EPX-200 (Lorcaserin) Developmental and Epileptic Encephalopathies CBS104 Refractory Epilepsy Momentum Across the Pipeline; Multiple Catalysts 2026–2028 Research collaboration with CiRC Biosciences. 17 January 13, 2026 Harmony Biosciences | J.P. Morgan Healthcare Conference | All rights reserved.

BP1.15205: Potential Best-In-Class Orexin 2 Receptor (OX2R) Agonist PRECLINICAL DATA PRESENTATION AT SLEEP AND WSC Single-oral dose administration of BP1.15205 in transgenic mice produced significant and dose-dependent increases in total wakefulness time and sleep latency at every dose tested beginning at 0.03 mg/kg and 0.1 mg/kg, respectfully, consistent with high potency FIH STUDY INITIATED IN 4Q 2025 Clinical data anticipated in mid-2026 UNIQUE STRUCTURE/CHEMICAL SCAFFOLD Differentiated from other known OX2R agonist chemical structures CLINICAL POTENTIAL • Potency and selectivity • Potent on-target effects • Potentially better AE profile • Once-daily dosing 18 January 13, 2026 Harmony Biosciences | J.P. Morgan Healthcare Conference | All rights reserved. 2026 Phase 1 Clinical PK Data Anticipated Mid-2026

EPX-100: Safety and effectiveness data from ongoing OLE of the Phase 3 Dravet Syndrome (DS) study presented at AES 2025 CLINICALLY MEANINGFUL REDUCTION IN SEIZURES Median reduction of ~50% in countable motor seizure frequency per 28 days (CMS-28) in participants who had at least 6-month exposure to EPX-100; at least 50% reduction in CMS-28 in 50% of these participants PRODUCT PROFILE: POTENTIAL TO OFFER A UNIQUE RISK/BENEFIT PROPOSITION No additional laboratory or special safety monitoring BID DOSING REGIMEN Convenient for patients and caregivers ONGOING PHASE 3 REGISTRATIONAL TRIAL IN PATIENTS WITH DRAVET SYNDROME (Argus Study) Topline data anticipated in 2027 1H 2027 Anticipate Topline Data from Ongoing Global Phase 3 Trial 19 January 13, 2026 Harmony Biosciences | J.P. Morgan Healthcare Conference | All rights reserved.

EPX-100: One of Most Advanced 5-HT2 (Serotonin) Agonist Programs in DEEs 20 January 13, 2026 Harmony Biosciences | J.P. Morgan Healthcare Conference | All rights reserved. ESTABLISHED 5-HT2 (SEROTONIN) AGONIST MECHANISM OF ACTION MoA validated via the zebrafish model ONGOING PHASE 3 TRIAL IN LENNOX-GASTAUT SYNDROME (LGS) (LIGHTHOUSE Study) Topline data anticipated 1H 2027 SAFETY: POTENTIAL TO OFFER A UNIQUE RISK/BENEFIT PROPOSITION No additional laboratory or special safety monitoring BID DOSING REGIMEN Convenient for patients and caregivers 1H 2027 Anticipate Topline Data from Ongoing Global Phase 3 Trial

Path to Long-Term Value Creation Beyond 2026 Pipeline Poised to Deliver Value Through Extension and Expansion of Pitolisant Franchise and Innovative Epilepsy Assets KEY TAKEAWAY 2027 Pitolisant GR PDUFA Pitolisant HD Phase 3 TLD in narcolepsy and idiopathic hypersomnia (IH) EPX-100 DS/LGS Phase 3 TLD 2028 Pitolisant HD PDUFA narcolepsy and IH EPX-100 DS/LGS PDUFA Pitolisant PWS PDUFA 2026 Pitolisant PWS Phase 3 TLD OX2R Phase 1 clinical PK data 21 January 13, 2026 Harmony Biosciences | J.P. Morgan Healthcare Conference | All rights reserved.

STRONG FINANCIAL PROFILE

Driving Value for Shareholders Based on Strong Financial Profile CONSISTENT REVENUE GROWTH AND PROFITABILITY ON TRACK TO BLOCKBUSTER STATUS IN NARCOLEPSY SELF FUNDING ACROSS THE ENTERPRISE POISED FOR VALUE CREATION Year-Over-Year Revenue 21% 2024 20251 2026 GUIDANCE $714.7M $868M $1.0-1.04B 23 January 13, 2026 Harmony Biosciences | J.P. Morgan Healthcare Conference | All rights reserved. 1. Net Revenue for fiscal year 2025 is preliminary, unaudited and subject to change

5 STRONG FINANCIAL PROFILE PHASE 3 PROGRAMS ON TRACK FOR BLOCKBUSTER STATUS

To deliver on our promise to patients and create value for shareholders

company/harmonybiosciences/ @harmonybio harmony_biosciences www.harmonybiosciences.com