Privacy Policy

Last updated: January 19, 2026

Catalyst Pharmaceuticals, Inc. (“Catalyst,” “we“, “us” or “our“) is a biopharmaceutical company focused on in-licensing, developing, and commercializing novel medicines for patients living with rare diseases. This Privacy Policy describes how Catalyst processes personal information that we collect through our digital and online properties or services that link to this Privacy Policy (including as applicable, our websites (www.catalystpharma.com; www.yourcatalystpathways.com; www.firdapse.com; www.firdapsehcp.com and others as they may be created), electronic communications, and social media pages) as well as our marketing activities, and other activities described in this Privacy Policy (collectively, the “Service”). This Privacy Policy does not apply to information we collect from individuals that complete an “enrollment form” for our Catalyst Pathways or other programs.

See U.S. State Privacy Rights Notice at Collection section of this Privacy Policy for additional information if you are a U.S. resident.

Our websites, products and services are designed for enterprise customers and their representatives. We do not offer products or services for use by individuals for their personal, family or household purposes. Accordingly, we treat all personal information we collect as pertaining to individuals in their capacities as representatives of the relevant enterprise and not their individual capacities.

This Privacy Policy does not apply to information that we process on behalf of our business customers while providing services to them. Our use of information that we process on behalf of our business customers is governed by our agreements with such customers. If you have concerns regarding your personal information that we process on behalf of our business customer, please direct your concerns to the business customer with which you have a relationship.

This Privacy Policy does not apply to our employees or independent contractors or job candidates.

Table of Contents

• Personal information we collect
• Tracking Technologies
• How we use your personal information
• How we share your personal information
• Your choices
• Advertising Choices
• Shine The Light Law Opt-Out
• Other sites and services
• Security
• International data transfers
• Children and Teens
• Changes to this Privacy Policy
• How to contact us
• U.S. State Privacy Rights Notice At Collection

Personal information we collect

Information you provide to us. Personal information you may provide to us includes:

• Contact data, such as your first and last name, alias, signature, salutation, email address, billing and mailing addresses, and phone number.
• Demographic data, such as your age, date of birth, city, state, and postal code.
• Communications data based on our exchanges with you, including when you contact us through the Service, communicate with us via email, phone, social media, or otherwise.
• Marketing data, such as your preferences for receiving our marketing communications and details about your engagement with them.
• Employment information, such as your past and current employers and job titles.
• Other data not specifically listed here, which we will use as described in this Privacy Policy or as otherwise disclosed at the time of collection.

Third-party sources. We may combine personal information we receive from you with personal information of the kinds identified above that we obtain from other sources, such as:

• Ad networks
• Data analytics providers
• Social media platforms

Automatic data collection. We, our service providers, and our advertising partners may automatically log information about you, your computer or mobile device, and your interaction over time with the Service, our communications and other online services, such as:

• Device data, such as your computer or mobile device’s operating system type and version, manufacturer and model, browser type, screen resolution, RAM and disk size, CPU usage, device type (e.g., phone, tablet), IP address, unique identifiers (including identifiers used for advertising purposes), language settings, mobile device carrier, radio/network information (e.g., Wi-Fi, LTE, 3G), and general location information such as city, state or geographic area.
• Approximate location data, for example, as inferred from network data or device settings.
• Communication interaction data such as your interactions with our email, text, or other communications (e.g., whether you open and/or forward emails) – we may do this through use of pixel tags (which are also known as clear GIFs), which may be embedded invisibly in our emails enabling us to detect if you have opened or forwarded a message.
• Online activity data, such as pages or screens you viewed, search history, how long you spent on a page or screen, the website you visited before browsing to the Service, navigation paths between pages or screens, information about your activity on a page or screen, access times and duration of access, and whether you have opened our emails or clicked links within them.

Tracking technologies. Some of the automatic collection described above is facilitated by the following technologies:

• Cookies, which are small text files that websites store on user devices and that allow web servers to record users’ web browsing activities and remember their submissions, preferences, credentials, and login status as they navigate a site. Cookies used on our sites include both “session cookies” that are deleted when a web browser session ends, “persistent cookies” that remain longer, “first party” cookies that we place and “third party” cookies that our service providers and other third parties place.
• Local storage technologies, like HTML5, that provide cookie-equivalent functionality but can store larger amounts of data on your device outside of your browser in connection with specific applications.
• Web beacons, also known as pixel tags or clear GIFs, which are used to demonstrate that a webpage or email was accessed or opened, or that certain content was viewed, clicked or forwarded.
• Session-replay technologies, such as those provided by third parties that employ software code to record users’ interactions with the Services in a manner that allows us to watch video replays of those user sessions. The replays include users’ clicks, mouse movements and scrolls during those sessions. These replays help us diagnose usability problems and identify areas for improvement.

How we use your personal information

We may use your personal information for the following purposes or as otherwise described at the time of collection:

Service delivery and operations. We may use your personal information to:

• provide and operate the Service;
• process your requests (e.g., grant requests);
• enable security features of the Service;
• personalize the service, including remembering your selections and preferences as you navigate the Service;
• communicate with you about the Service, including by sending Service-related announcements, updates, security alerts, and support and administrative messages;
• understand your needs and interests, and personalize your experience with the Service and our communications;
• provide support for the Service, and respond to your requests, questions and feedback; and
• fraud prevention and security.

Marketing and advertising. We and our third-party advertising partners may collect and use your personal information for marketing and advertising purposes:

• Direct marketing. We may send you direct marketing communications and may personalize these messages based on your needs and interests. You may opt-out of our marketing communications as described in the Opt-out of marketing section.
• Interest-based advertising. We and our third-party advertising partners may use cookies, pixels and other technologies to collect information about your interaction (including the data described in the Automatic Data Collection section above) with the Service, our communications and other third party online services over time, and use that information to serve online ads that they think will interest you. This is called interest-based advertising. We may also share information about our users with these companies to facilitate interest-based advertising to those or similar users on other online properties. You can learn more about your choices for limiting interest-based advertising in the Your choices section.

Compliance and protection. We may use your personal information to:

• comply with applicable laws, lawful requests, and legal process, such as to respond to subpoenas, court orders, investigations or requests from government authorities;
• protect our, your or others’ rights, privacy, safety or property (including by making and defending legal claims);
• audit our internal processes for compliance with legal and contractual requirements or our internal policies;
• enforce the terms and conditions that govern the Service; and
• prevent, identify, investigate and deter fraudulent, harmful, unauthorized, unethical or illegal activity, including cyberattacks and identity theft.

With your consent. In some cases, we may specifically ask for your consent to collect, use, or share your personal information for further purposes, if those purposes are not compatible with the initial purpose for which that personal information was collected.

Cookies and similar technologies. In addition to the other uses included in this section, we may use the Cookies and similar technologies described above for the following purposes:

• Technical operation. To allow the technical operation of the Service, such as remembering selections as you navigate the site.
• Functionality. To enhance the performance and functionality of our services.
• Analytics. To help us understand user activity on the Service, including the volume and demographics of users, which pages are most and least visited and how users move around the Service or interact with our emails. For example, we use Google Analytics for this purpose. You can learn more about Google Analytics and how to prevent the use of Google Analytics relating to your use of our sites here: https://tools.google.com/dlpage/gaoptout.

Data sharing in the context of corporate transactions, we may share certain personal information in the context of actual or prospective corporate transactions – for more information, see How we share your personal information, below.

How we share your personal information

We may share your personal information with the following parties and as otherwise described in this Privacy Policy, in other applicable notices, or at the time of collection.

Service providers. Third parties that provide services on our behalf or help us operate the Service or our business (such as hosting, internet service providers, information technology, customer support, email delivery, marketing, consumer research and website/data analytics).

Advertising partners / ad networks. Third-party advertising companies for the interest-based advertising purposes described above.

Social networks. We use their ad services to display ads to our customers, or other people like them, on social media.

Third parties designated by you. We may share your personal information with third parties where you have instructed us or provided your consent to do so.

Professional advisors. Professional advisors, such as lawyers, auditors, bankers and insurers, where necessary in the course of the professional services that they render to us.

Authorities and others. Law enforcement, government authorities, and private parties in litigation, as we believe in good faith to be necessary or appropriate for the Compliance and protection purposes described above.

Corporate transactions. We may disclose personal information in the context of actual or prospective business transactions (e.g., investments in Catalyst, financing of Catalyst, public stock offerings, the sale, transfer or merger of all or part of our business, assets or shares, liquidation or reorganization). For example, we may need to share certain personal information with prospective counterparties and their advisers. We may disclose your personal information to an acquirer, successor, or assignee of Catalyst or a portion of our business assets as part of any merger, acquisition, sale of assets, or similar transaction, and/or in the event of an insolvency, bankruptcy, or receivership in which personal information is transferred to one or more third parties as one of our business assets.

Your choices

In this section, we describe the choices available to you.

Opt-out of communications. You may opt-out of marketing-related emails by following the opt-out or unsubscribe instructions at the bottom of the email, or by contacting us. It may take time for your opt-out to be effective. Please note that if you choose to opt-out of marketing-related emails, you may continue to receive service-related and other non-marketing emails.

Cookies. Most browsers let you remove or reject cookies. To do this, follow the instructions in your browser settings. Many browsers accept cookies by default until you change your settings. Please note that if you set your browser to disable cookies, the Service may not work properly. For more information about cookies, including how to see what cookies have been set on your browser and how to manage and delete them, visit http://www.allaboutcookies.org .

Blocking images/clear gifs: Most browsers and devices allow you to configure your device to prevent images from loading, so the business hosting the image will not detect that you have viewed a page. To do this, follow the instructions in your particular browser or device settings.

Do Not Track. Some Internet browsers may be configured to send “Do Not Track” signals to the online services that you visit. If you are a California resident, you can learn more about how we respond to Global Privacy Control (GPC) signals in the U.S. State Privacy Rights Notice at Collection section of this Privacy Policy.

Advertising choices. You may be able to limit use of your information for interest-based advertising through the following settings/options/tools:

• Browser settings. Changing your internet web browser settings to block third-party cookies.
• Privacy browsers/plug-ins. Using privacy browsers and/or ad-blocking browser plug-ins that let you block tracking technologies.
• Platform settings. Some platforms offer opt-out features that let you opt-out of use of your information for interest-based advertising. You may be able to exercise that option for Google and Facebook at the following websites:
  • Google: https://adssettings.google.com/
  • Facebook: https://www.facebook.com/about/ads
• Ad industry tools. Opting out of interest-based ads from companies that participate in the following industry opt-out programs:
  • Network Advertising Initiative: http://www.networkadvertising.org/managing/opt_out.asp
  • Digital Advertising Alliance: https://optout.aboutads.info.
  • AppChoices mobile app, available at https://www.youradchoices.com/appchoices, which will allow you to opt-out of interest-based ads in mobile apps served by participating members of the Digital Advertising Alliance.
• Mobile settings. Using your mobile device settings to limit use of the advertising ID associated with your mobile device for interest-based advertising purposes.

You will need to apply these advertising-related opt-out settings on each device and browser from which you wish to limit the use of your information for interest-based advertising purposes. We cannot offer any assurances as to whether the companies we work with participate in the opt-out programs described above.

Additional options for controlling interest-based advertising are located in our State Privacy Rights Notice At Collection.

Declining to provide information. We need to collect personal information to provide certain services. If you do not provide the information we identify as required or mandatory, we may not be able to provide those services.

Retention Period for Personal Information. We generally retain personal information to fulfill the purposes for which we collected it, including for the purposes of satisfying any legal, accounting, or reporting requirements, to establish or defend legal claims, or for fraud prevention purposes. To determine the appropriate retention period for personal information, we may consider factors such as the length of time we have an ongoing relationship with you and provide services to you; the amount, nature, and sensitivity of the personal information; the potential risk of harm from unauthorized use or disclosure of your personal information; the purposes for which we process your personal information and whether we can achieve those purposes through other means; whether there is a legal obligation to which we are subject (for example, certain laws require us to keep records of your transactions for a certain period of time before we can delete them); whether retention is advisable in light of our legal position, such as in regard to applicable statutes of limitations, litigation or regulatory investigations; and applicable legal requirements. For example, we will retain your personal information for as long as you keep using our services, and the length of time thereafter during which we may have a legitimate need to reference your personal information to address issues that may arise. When we no longer require the personal information we have collected about you, we may either delete it or de-identify it.

Other sites and services

The Service may contain links to websites, mobile applications, and other online services operated by third parties. In addition, our content may be integrated into web pages or other online services that are not associated with us. These links and integrations are not an endorsement of, or representation that we are affiliated with, any third party. We do not control websites, mobile applications or online services operated by third parties, and we are not responsible for their actions. We encourage you to read the privacy policies of the other websites, mobile applications and online services you use.

Security

We employ technical, organizational and physical safeguards that are designed to protect the personal information we collect. However, security risk is inherent in all Internet and information technologies, and we cannot guarantee the security of your personal information.

International data transfer

We are headquartered in the United States and may use service providers that operate in other countries. Your personal information may be transferred to the United States or other locations where privacy laws may not be as protective as those in your state, province, or country.

Children and Teens

The Service is not intended for use by anyone under 18 years of age. If you are a parent or guardian of a minor from whom you believe we have collected personal information in a manner prohibited by law, please contact us. If we learn that we have collected personal information through the Service from a child without the consent of the child’s parent or guardian as required by law, we will comply with applicable legal requirements to delete the information.

Changes to this Privacy Policy

The “LAST UPDATED” legend at the top of this Privacy Policy indicates when this Privacy Policy was last revised. We reserve the right to modify this Privacy Policy at any time. We will notify you by updating the “Last Updated” date. Depending on the kind of change we make, we may also notify you directly or ask for your consent to the change. Any modifications to this Privacy Policy will be effective upon our posting the modified version or as otherwise indicated at the time of posting.

How to contact us

• Email: info@catalystpharma.com
• Phone: 1 (844) 347-2773

U.S. State Privacy Rights Notice At Collection

Except as otherwise provided, this section applies to residents of California.

This State Privacy Rights Notice At Collection is part of our full Privacy Policy.

This section describes how we collect, retain, use, disclose, sell and share for the purposes of targeted advertising personal information of residents of California and the rights these users may have with respect to their personal information. Please note that not all rights listed below may be afforded to all individuals. In addition, we may not be able to process your access, correction or deletion request if you do not provide us with sufficient detail to allow us to confirm your identity and understand and respond to your request.

For purposes of this section, the term “personal information” means information that relates to an identified or identifiable natural person, or that is reasonably capable of being used to identify, contact, or precisely locate a natural person, household, or a particular computing system or device.

We do not attempt to reidentify deidentified information derived from personal information, except for the purpose of testing whether our deidentification processes comply with applicable law.

Your privacy rights. You may request to exercise the rights listed below. We will respond to your request in accordance with applicable law. We may decline to honor your request where an exception applies.

Right to know

• You can request to know whether we process your personal information.
• You can request the following information about how we have collected and used your personal information during the past 12 months and how we will continue to do so:
  • The categories of personal information that we have collected.
  • The categories of sources from which we collected personal information.
  • The business or commercial purpose for collecting, selling, and/or sharing personal information for targeted advertising purposes.
  • The categories of personal information that we sold or shared for targeted advertising purposes, and the categories of third parties to whom this information was sold or shared, categorized by the type of personal information for each type of third party.
  • The categories of personal information that we disclosed for business purposes and the types of entities to whom this information was disclosed.
• Access. You can request a portable copy or representative summary of the personal information that we have collected about you.
• Correction. You can ask us to correct inaccurate personal information that we have collected about you.
• Deletion. You can ask us to delete the personal information that we have collected from or about you.
• Revoke consent. You may have the right to revoke your consent to our processing of your personal information.
• Opt-out.
  • Opt-out of targeted advertising. We process personal information for targeted advertising purposes. You can opt out of the use of your personal information for targeted advertising purposes. We do not otherwise sell your personal information.
  • Automated decision making. We do not use your personal information to engage in automated processing or profiling personal information to evaluate, analyze, or predict personal aspects related to your economic situation, health, personal preferences, interests, reliability, behavior, location, or movements to make a decision that produces legal or similarly significant effects.
• Sensitive Personal Information
  • We do not collect or process Sensitive Personal Information.
• Nondiscrimination. You are entitled to exercise the rights described above free from discrimination as prohibited by applicable State Privacy Laws.
• Appeal. You can appeal our denial of any request validly submitted.

Exercising your right to know, access, correction, deletion, and appeal. You may submit requests by calling us toll free at 1 (844) 347-2773 or via email to info@catalystpharma.com.

We cannot process your request if you do not provide us with sufficient detail to allow us to understand and respond to it.

Exercising your right to opt-out of/revoke your consent to the “sharing” of your personal information for targeted advertising purposes. You can submit requests to opt-out of targeted advertising via email to info@catalystpharma.com or by broadcasting the Global Privacy Control signal. For information about how to use the Global Privacy Control, please visit https://globalprivacycontrol.org/. These signals set your opt-out preferences only for the particular browser or device you are using and any consumer profile that we associate with that browser or device.

Verification of Identity; Authorized agents. We may need to verify your identity to process your know, access, correction, deletion, or appeal requests and reserve the right to confirm your residency. We may need to request your email address, in order to verify your identity and protect against fraudulent requests. If you make a request to delete, we may ask you to confirm your request before we delete your personal information.

You may enable an authorized agent to make a request on your behalf. However, we may need to verify your authorized agent’s identity and authority to act on your behalf. Depending on the kind of request you have made, we may require a copy of a valid power of attorney given to your authorized agent pursuant to applicable law. If you have not provided your agent with such a power of attorney, we may ask you to take additional steps permitted by law to verify that your request is authorized, such as by providing your agent with written and signed permission to exercise your State Privacy Law rights on your behalf, the information we request to verify your identity, or confirmation that you have given the authorized agent permission to submit the request.

Personal information that we collect, use and disclose. We have summarized the personal information we collect and may disclose, sell to or share with third parties by reference below to both the categories of personal information defined in the “Personal Information we collect,” “How we use your personal information,” and “How we share your personal information” sections of this Policy above and the categories of personal information specified in state law. This table describes our practices currently and during the 12 months preceding the effective date of this Privacy Policy. Information you voluntarily provide to us, such as in free-form webforms, may contain other categories of personal information not described below.

See our full Privacy Policy for descriptions of each entry in this table.

Consumers under 18. We do not have actual knowledge that we have collected, sold, or shared the personal information of residents who are under 18 years of age.

Retention Period for Personal Information. We generally retain personal information to fulfill the purposes for which we collected it, including for the purposes of satisfying any legal, accounting, or reporting requirements, to establish or defend legal claims, or for fraud prevention purposes. To determine the appropriate retention period for personal information, we may consider factors such as the length of time we have an ongoing relationship with you and provide services to you; the amount, nature, and sensitivity of the personal information; the potential risk of harm from unauthorized use or disclosure of your personal information; the purposes for which we process your personal information and whether we can achieve those purposes through other means; whether there is a legal obligation to which we are subject (for example, certain laws require us to keep records of your transactions for a certain period of time before we can delete them); whether retention is advisable in light of our legal position, such as in regard to applicable statutes of limitations, litigation or regulatory investigations; and applicable legal requirements. For example, we will retain your personal information for as long as you have an account with us or keep using our services, and the length of time thereafter during which we may have a legitimate need to reference your personal information to address issues that may arise. When we no longer require the personal information we have collected about you, we may either delete it or de-identify it.

Contact Us. If you have questions or concerns about our privacy policies or information practices, please contact us using the contact details set forth in the How to contact us section, above.