What Changed
Price Move History
- Daily moves over 5%
- 18 252 sessions, September 30, 2025 to September 30, 2026
- Largest daily move
- +16.7% close of May 5, 2026
- 1-year change
- +20% closing prices, September 30, 2025 to September 30, 2026
- 5-year change
- +84.5% closing prices, September 30, 2021 to September 30, 2026
Company Description
Cytokinetics, Incorporated (Nasdaq: CYTK) is a specialty cardiovascular biopharmaceutical company focused on diseases of cardiac muscle dysfunction. According to multiple company disclosures, Cytokinetics builds on over 25 years of scientific work in muscle biology and advances a pipeline of potential new medicines intended to optimize muscle performance in people with serious cardiovascular and other muscle-related conditions.
Business focus and therapeutic area
Cytokinetics describes itself as concentrating on patients suffering from diseases of cardiac muscle dysfunction. Its work centers on muscle biology and the modulation of cardiac contractility through small molecules that interact with cardiac myosin or skeletal muscle proteins. The company’s activities span late-stage clinical development, regulatory interactions and, where approvals have been granted, commercialization planning and execution.
Key approved medicine: MYQORZO (aficamten)
The company highlights MYQORZO (aficamten) as a core asset. In recent announcements, Cytokinetics states that MYQORZO (aficamten) is a cardiac myosin inhibitor approved by the U.S. Food and Drug Administration for the treatment of adults with symptomatic obstructive hypertrophic cardiomyopathy (oHCM) to improve functional capacity and symptoms. The company also reports that MYQORZO (aficamten) has been approved by the China National Medical Products Administration for adults with obstructive hypertrophic cardiomyopathy and that a positive opinion recommending marketing authorization in the European Union has been adopted by the Committee for Medicinal Products for Human Use of the European Medicines Agency.
Cytokinetics explains that MYQORZO (aficamten) is an allosteric and reversible inhibitor of cardiac myosin motor activity. In patients with obstructive hypertrophic cardiomyopathy, the company reports that myosin inhibition with MYQORZO reduces cardiac contractility and left ventricular outflow tract obstruction. The company notes that MYQORZO was engineered to achieve a predictable exposure–response relationship, rapid onset of action and reversibility, based on its internal development work and published data.
Clinical development programs in hypertrophic cardiomyopathy
Beyond the approved indication in obstructive hypertrophic cardiomyopathy, Cytokinetics states that aficamten is being studied in several clinical trials in hypertrophic cardiomyopathy. These include ACACIA-HCM, a pivotal Phase 3 trial in adults with non-obstructive hypertrophic cardiomyopathy, and CEDAR-HCM, a trial in a pediatric population with symptomatic obstructive hypertrophic cardiomyopathy. The company also refers to FOREST-HCM, an open-label extension study in patients with hypertrophic cardiomyopathy, and MAPLE-HCM, a Phase 3 randomized, double-blind, active-comparator trial comparing aficamten with metoprolol in patients with left ventricular outflow tract obstruction.
According to company communications, results from SEQUOIA-HCM, a pivotal Phase 3 trial in symptomatic obstructive hypertrophic cardiomyopathy, supported regulatory submissions for aficamten. Cytokinetics reports that SEQUOIA-HCM demonstrated efficacy and safety across measures such as exercise capacity, symptoms, hemodynamics and biomarkers, and that these data were published in peer-reviewed medical journals.
Additional cardiac muscle programs
Cytokinetics also reports development of other investigational medicines targeting cardiac muscle function. The company describes omecamtiv mecarbil as a cardiac myosin activator in a confirmatory Phase 3 clinical trial (COMET-HF) in patients with symptomatic heart failure with severely reduced ejection fraction. In addition, Cytokinetics is developing ulacamten, described as a cardiac myosin inhibitor with a mechanism of action distinct from aficamten, in a Phase 2 clinical trial (AMBER-HFpEF) in patients with symptomatic heart failure with preserved ejection fraction and left ventricular ejection fraction at or above a specified threshold.
Skeletal muscle and broader muscle biology research
In its public statements, the company notes that it is advancing CK-089, characterized as a fast skeletal muscle troponin activator with potential therapeutic application to a specific type of muscular dystrophy and other conditions of impaired skeletal muscle function. Cytokinetics also indicates that it continues pre-clinical development and research activities directed to additional programs in muscle biology, with the stated intention to build a muscle biology franchise focused on medicines designed to optimize muscle performance in cardiac and other diseases of muscle dysfunction.
Collaborations and geographic scope
Cytokinetics has described collaboration arrangements related to aficamten. For example, it reports that Sanofi holds exclusive rights to develop and commercialize MYQORZO (aficamten) for obstructive and non-obstructive hypertrophic cardiomyopathy in Greater China under a license and collaboration agreement. The company states that it is eligible to receive development and commercial milestone payments and royalties on net sales in that territory. Cytokinetics also notes that CAMELLIA-HCM, a Phase 3 trial of aficamten in Japanese patients with obstructive hypertrophic cardiomyopathy, is being conducted by Bayer in collaboration with Cytokinetics to support potential marketing authorization in Japan.
Regulatory and commercial readiness
Company disclosures describe extensive regulatory and commercial readiness activities around aficamten. Cytokinetics has reported interactions with the U.S. Food and Drug Administration regarding a New Drug Application for aficamten in obstructive hypertrophic cardiomyopathy, including a Late Cycle Meeting to discuss a proposed Risk Evaluation and Mitigation Strategy and anticipated post-marketing requirements. It has also described ongoing reviews of marketing applications by regulatory authorities in the European Union and China, and it has communicated expectations around potential decisions from these bodies.
On the commercial side, Cytokinetics reports activities such as sales force onboarding and training, preparation of promotional launch campaigns, development of patient support programs and engagement with payers. The company has also described a personalized program in the United States for patients prescribed MYQORZO, intended to provide disease and product education and assistance related to insurance benefits and financial support for eligible patients.
Corporate and capital markets profile
Cytokinetics states in its SEC filings that its common stock, with par value $0.001 per share, trades on The Nasdaq Global Select Market under the symbol CYTK. The company has disclosed various capital raising activities, including the issuance of convertible senior notes due 2031 and related note exchange transactions, as well as a multi-tranche term loan agreement with a development funding lender. These financings are described as supporting the potential commercial launch of aficamten, the expansion of its development program and the advancement of its broader research pipeline.
In addition, Cytokinetics periodically reports on stock-based compensation awards and inducement grants to employees under its equity incentive plans, as well as executive appointments and related compensation arrangements, as part of its ongoing public company reporting obligations.
Engagement with the hypertrophic cardiomyopathy community
Beyond drug development, Cytokinetics has announced support for initiatives intended to improve care for people living with hypertrophic cardiomyopathy. For example, the company has described participation in a multi-year initiative led by the American Heart Association to address disparities in access to care, diagnosis and treatment for hypertrophic cardiomyopathy. Cytokinetics states that this support is intended to help close gaps between evidence, guidelines, implementation and equity in healthcare delivery for this condition.
Summary
Across its public communications, Cytokinetics presents itself as a Nasdaq-listed specialty cardiovascular biopharmaceutical company with a focus on muscle biology and cardiac muscle dysfunction. Its activities span an approved cardiac myosin inhibitor for symptomatic obstructive hypertrophic cardiomyopathy, late-stage development programs in hypertrophic cardiomyopathy and heart failure, pre-clinical research in skeletal muscle function and collaborations intended to extend the reach of its therapies in specific geographic regions.
Stock Performance
Cytokinetics (CYTK) closed at $65.94 on September 30, 2026. Over the past 12 months, the price has gained 20.0%.
CYTK Metrics & Rankings
Price returns through September 30, 2026. Month-to-date and YTD include the first trading day. Ranking links may use different dates.
Latest News
Cytokinetics has 10 recent news articles, with the latest published today. Of the recent coverage, 3 articles coincided with positive price movement and 5 with negative movement. Key topics include clinical trial, earnings. View all CYTK news →
SEC Filings
Cytokinetics has filed 10 recent SEC filings, including 7 Form 4, 3 Form 144. The most recent filing was submitted on September 28, 2026. SEC filings provide transparency into a company's financial condition, material events, and regulatory compliance. View all CYTK SEC filings →
Insider Radar
Insider selling at Cytokinetics over the past 90 days can reflect routine portfolio management, scheduled trading plans (Rule 10b5-1), tax planning, or compensation-related dispositions rather than a directional view on the stock.
Financial Highlights
Cytokinetics generated $88.0M in revenue in FY2025, operating income reached -$612.3M (-695.4% operating margin), and net income was -$785.0M, reflecting a -891.6% net profit margin. Diluted earnings per share stood at -$6.54. The company generated -$510.0M in operating cash flow. The current ratio was 4.53, measuring current assets divided by current liabilities.
Upcoming Events
Supplemental NDA filing
sNDA submission
MAPLE-HCM sNDA decision
Application deadline
FDA PDUFA decision for MAPLE-HCM
RSU vesting (40%)
Option vesting (25%)
Grant recipients announced
RSU 1st tranche vesting
Option 25% cliff vesting
Cytokinetics has 29 upcoming scheduled events. The next event, "Supplemental NDA filing", is scheduled for October 1, 2026 (today). 12 of the upcoming events are financial in nature, such as earnings calls or quarterly results. Investors can track these dates to stay informed about potential catalysts that may affect the CYTK stock price.
Short Interest History
Short interest in Cytokinetics (CYTK) currently stands at 17.5 million shares, up 0.2% from the previous reporting period, representing 12.9% of the float. Since September 2025, short interest has increased by 23.9%.
Days to Cover History
Days to cover for Cytokinetics (CYTK) currently stands at 10.6 days, up 8.4% from the previous period. The ratio is the reported short interest divided by the average daily trading volume. Since September 2025, the figure has increased by 116.6%. Across the settlements charted above, it has ranged from 3.4 to 10.6 days.
CYTK Company Profile & Sector Positioning
Cytokinetics (CYTK) operates in the Biotechnology industry within the broader Healthcare sector and is listed on the NASDAQ.
Investors comparing CYTK often look at related companies in the same sector, including Axsome Therapeutics, Inc (AXSM), Legend Biotech Corporation (LEGN), Abivax SA (ABVX), Rhythm Pharmaceuticals, Inc. (RYTM), and Nuvalent, Inc. (NUVL). Comparing financial metrics, valuation ratios, and stock performance across these peers can help investors evaluate CYTK's relative position within its industry.