California Privacy Notice

Effective Date: February 24, 2026

This California Privacy Notice (“Notice”) supplements the Privacy Policy of Fieldstone Bio (“Fieldstone,” “we,” “us,” or “our”) and applies solely to individuals who reside in the State of California (“California residents” or “you”).

This Notice is provided in accordance with the California Consumer Privacy Act, as amended by the California Privacy Rights Act (“CCPA/CPRA”).

1. Scope and Context of Data Collection

Fieldstone operates its website, fieldstone.bio (the “Site”), primarily as an informational resource for potential partners, collaborators, and professional counterparties. The Site is not designed or operated as a consumer-facing marketing platform, lead-generation funnel, or advertising service, and Fieldstone does not intentionally solicit or target members of the general public.

2. Categories of Personal Information Collected

Within the preceding 12 months, Fieldstone may have collected the following categories of personal information:

Identifiers

• Name
• Email address
• Internet Protocol (IP) address

Internet or Network Activity Information

• Browser type and device information
• Pages viewed and interactions with the Site
• Performance and reliability data

Professional Information

• Company or organizational affiliation, if voluntarily provided

Fieldstone does not collect sensitive personal information as defined under CPRA.

3. Purposes for Collection and Use

Personal information is collected and used solely for the following limited business purposes:

• Responding to direct inquiries initiated by the user
• Facilitating professional discussions with potential partners
• Operating, securing, and maintaining the Site
• Diagnosing technical issues and ensuring reliability
• Complying with applicable legal obligations

Fieldstone does not use personal information for:

• behavioral advertising
• cross-context advertising
• consumer profiling
• automated decision-making with legal or significant effects

4. Sources of Personal Information

Personal information is collected from:

• You, when you voluntarily submit information through the Site
• Your browser or device when you access the Site
• Service providers that support basic Site operations

5. Disclosure of Personal Information

Fieldstone may disclose personal information to service providers solely for business purposes, including:

• Website hosting and infrastructure
• Security, performance monitoring, and error logging
• Spam prevention and abuse detection

Service providers are contractually restricted from retaining, using, or disclosing personal information for any purpose other than providing services to Fieldstone.

6. Sale or Sharing of Personal Information

Fieldstone does not sell personal information and does not share personal information for cross-context behavioral advertising as defined under applicable law.

Accordingly:

• No opt-out of sale or sharing is required.
• No financial incentives are offered in connection with personal information.

Because we do not sell or share personal information as defined under applicable law, Global Privacy Control (GPC) signals do not result in any changes to our data processing practices.

7. Retention of Personal Information

Personal information is retained only for as long as reasonably necessary to:

• respond to inquiries
• maintain appropriate business records
• comply with legal or regulatory requirements

Retention periods vary depending on the nature and purpose of the information.

8. California Privacy Rights

Subject to verification and applicable legal exceptions, California residents have the right to:

• Right to Know
  Request disclosure of the categories and specific pieces of personal information collected.
• Right to Delete
  Request deletion of personal information collected from you.
• Right to Correct
  Request correction of inaccurate personal information.
• Right to Limit Use of Sensitive Personal Information
  Fieldstone does not use sensitive personal information beyond permitted business purposes.
• Right to Opt Out of Sale or Sharing
  Fieldstone does not sell or share personal information.
• Right to Non-Discrimination
  Fieldstone will not discriminate against you for exercising your privacy rights.

9. Exercising Your Rights

You may exercise your California privacy rights by contacting:

Email: info@fieldstone.bio

We will respond to verified requests in accordance with applicable law. We will verify your identity by matching the information you provide with information we maintain and may request additional information as necessary to confirm your identity before processing your request. If we decline to take action on your request, we will inform you of the reasons and provide information about any available appeal process.

10. Authorized Agents

You may designate an authorized agent to submit a request on your behalf. We may require reasonable verification of identity and proof of authorization.

11. Updates to This Notice

Fieldstone may update this California Privacy Notice from time to time. Any changes will be posted on this page with a revised effective date.