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Cookie Policy

Updated as of January 1, 2023

Our Cookie Policy

Gritstone bio, Inc. (“Gritstone,” “us,” “we,” or “our”) uses cookies on, its subdomains, and any associated web pages (the “Site”), as well as in our applications and other portals, products, emails, services, events, and interactive features controlled by us (collectively, the “Services”). By using the Site and the Services, you consent to our use of cookies. Our Cookie Policy explains what cookies are, how we use them, how third parties we may partner with may use cookies on the Site, your choices regarding cookies, and how you can manage them.

What are cookies?

A “cookie” is a small piece of information stored on your device when you visit a website. The cookie means that the Site will remember you and how you’ve used the Site every time you come back.

A cookie can be a “persistent” or “session” cookie.  A “persistent” cookie will remain for a period of time set for that cookie or until you delete the cookie, depending on your browser settings. A “session-based” cookie is allocated only for the duration of your visit to our website and automatically expires or erases when you close down your browser.

First-party cookies originate from the same domain as the website you’re currently visiting (in this case,  Third-party cookies originate from a domain that’s different from the website being visited. For example, when you visit our website, we may link to another company’s website, or another company, like Google Analytics, Adobe or Vimeo, may place cookies on your device to provide us with analytics on our website visitors and to let us know if you view our content. We don’t control how these third parties use their cookies, so we suggest you check their website to see how they’re using them and how you can manage them.  How Google uses cookies is here, Adobe Analytics’ cookie policy is here and Vimeo’s cookie policy is here.

If you want to know more about cookies, head to (please note: links in this Cookie Policy are not operated by us, and may open a new window or browser tab).

How we use cookies

We use cookies to do several things. For example, cookies are used to enable certain functions of the Site, enhance security, improve functionality of the Site, remember your preferences, or count the number of people looking at a website. We also use them to keep track of what you’ve done on the Site, and they may be used by third parties to make online advertising more relevant to you.

We receive data from you as part of the communication connection itself through the standard electronic greeting between your computer and our servers. This information often consists of network routing (where you came from), equipment information (browser type), Internet protocol address, date and time. Other parts of the Site use cookies (including signup forms) to collect information about your use of the site and to facilitate return visits. Cookies on the Site may collect the following information: a unique identifier, user preferences and profile information used to personalize the content that is shown.

Cookies themselves don’t hold personally identifiable information (“PII”). They only have a unique alphanumeric identifier that sits on your browser. And in many cases, we won’t be able to link the information we collect by using a cookie back to you. They can, however, enable us to link that information back to you and your personal information, for example, when you log in, or choose to register for a service, white paper, or newsletter.

We may also engage third parties to track and analyze non-personally and personally identifiable website data and for those third parties to provide advertisements. To do so, we may permit third parties to place cookies on devices of users of our Site, where permitted by law, and subject to your right to opt out through the Site. We use the data collected to help us administer and improve the quality of the Site and to analyze Site usage. Such third parties may combine the information that we provide about you with other information that they have collected. These third parties are required to use your information in accordance with this Cookie Policy and the Privacy Policy. We will record all such disclosures and will use reasonable efforts to ensure that such third parties do not use your PII for any purpose that is not provided in our contract with them or expressly provided for herein.

We’ve put our cookies into the following categories or “types”, to make it easier for you to understand why we need them:

(1) Strictly necessary – these are used to help make our Site work efficiently.

(2) Performance – these are used to analyze the way our Site works and how we can improve it.

(3) Functionality – these help to enhance your experience by doing things like remembering products you’ve added to your basket.

(4) Targeting/Advertising – these are used to share some information with third parties who we advertise with, so we know how you’ve reached our Site. We can also use cookies to identify the parts of the Site that you are interested in. We then use this information to show you advertisements and pages we think may also be of interest to you, to tailor how we communicate with you, or to tailor the contents of the communications we send to you. If you prefer, you can opt out of these. Tailoring of content means it includes information reflecting the interest you’ve shown in the content of our web pages or offers or promotions that we think may interest you, and to improve how we respond to your needs.

In addition to the cookies we use on our Site, we also use cookies and similar technologies in some emails and notifications we send to you. These help us to understand whether you have opened the email and how you have interacted with it. If you have enabled images, cookies may be set on your computer or mobile device. Cookies will also be set if you click on any link within the email.

Controlling Your Cookies

To sign up for information or Services with Gritstone, you must have cookies enabled on your internet browser. If you choose not to enable cookies, you will still be able to browse our Site, but it will restrict some of the functionality of our Site and what you can do.

If you don't wish to accept cookies from one of our emails, you can choose not to download any images or click on any links. You can also set your browser to restrict cookies or to reject them entirely. These settings will apply to all cookies, whether included on websites or in emails. Depending on your email or browser settings, cookies in an email may sometimes be automatically accepted (for example, when you’ve added an email address to your address book or safe senders list). For more information, refer to your email browser or device instructions.

You can set your web browser to alert you when a cookie is being used. You can also get information on the duration of the cookie and what server your data is being returned to. You then can accept or reject the cookie. Additionally, you can set your browser to refuse all cookies or accept only cookies returned to the originating servers.

You can opt in or out of cookies at any time – except strictly necessary cookies (these are used to help make our website work efficiently). If you are located in the European Economic Area (“EEA”) and our servers can detect the geolocation information provided by your device via IP address or other geolocation services, then all cookies other than Strictly Necessary Cookies will be set to “off” when you visit our Site. Please note that you may not be able to access all of the functionality of our Site if your cookies are turned off. EEA users may opt-in to or opt-out of these cookies by toggling their cookie preferences.  Users outside of the EEA will automatically be set to “accept all cookies.”  However, such users may opt out of Targeting or Advertising Cookies by using the cookie preferences tool.  You may also “clear” all cookies to force our cookie preferences panel to restart so that you may change your cookie preferences at any time. Currently it is impossible to synchronize your cookies settings between all of your browsers and devices (e.g., your computer and your smartphone), so you must manage cookies on each browser, on each device. Some browsers, but not all, may offer limited synchronization of cookies.

Information on controlling and deleting cookies is available at Some of the more popular browsers (and links to manage your cookies on each) are:

You should also check your particular browser and Device for more current information. Technology is rapidly changing in this area and the implementation of Global Privacy Controls may affect how you use cookies.

Please note that some services may not function or may have more limited functionality if your web browser does not accept cookies. However, you can allow cookies from specific websites by making them ‘trusted websites’ in your web browser.

If you want to opt-out of cookies across different advertising networks, the Network Advertising Initiative website – – has more information and guidance.

For our collection of data through Google Analytics and Adobe Analytics, which both use cookies and technologies to collect and analyze data about your use of the Site and your use of other websites, apps and online resources, you may be able to opt out directly from the third party. You can learn about Google’s practices by going to and opt out by downloading the Google Analytics opt out browser add-on, available at You can learn more about Adobe and opt out by visiting