SCHEDULE: Dimensional Fund Advisors Reports 3.9% Stake in Castle Biosciences

Dimensional Fund Advisors LP has disclosed a 3.9% passive ownership stake in Castle Biosciences Inc. common stock as of December 31, 2025.

Summary

• Dimensional Fund Advisors LP, an investment adviser, reported beneficial ownership of 1,143,799 shares of Castle Biosciences Inc. common stock.
• This represents 3.9% of the issuer's class of securities.
• The shares are held by various investment companies, commingled funds, group trusts, and separate accounts for which Dimensional Fund Advisors LP acts as an investment adviser or sub-adviser.
• Dimensional Fund Advisors LP disclaims beneficial ownership of these securities, as they are owned by the Funds.
• The filing is an Amendment No. 1 to a Schedule 13G, indicating a change from a previous filing.

Sentiment

Score: 5

Explanation: The filing is a factual disclosure of passive beneficial ownership and does not contain information that would inherently indicate positive or negative sentiment regarding the issuer's performance or prospects.

Positives

• The disclosure of a significant stake by an institutional investor like Dimensional Fund Advisors LP can be viewed as a vote of confidence in Castle Biosciences Inc.

Risks

• Dimensional Fund Advisors LP disclaims beneficial ownership of the reported securities, stating they are owned by the Funds, which means direct control or influence over the issuer by Dimensional is limited.
• The filing of this Schedule 13G shall not be construed as an admission that the reporting person or any of its affiliates is the beneficial owner of any securities covered by this Schedule 13G for any other purposes than Section 13(d) of the Securities Exchange Act of 1934.

Future Outlook

NA

Management Comments

• Dimensional Fund Advisors LP, an investment adviser registered under Section 203 of the Investment Advisors Act of 1940, furnishes investment advice to four investment companies registered under the Investment Company Act of 1940, and serves as investment manager or sub-adviser to certain other commingled funds, group trusts and separate accounts.
• In its role as investment advisor, sub-adviser and/or manager, Dimensional Fund Advisors LP or its subsidiaries may possess voting and/or investment power over the securities of the Issuer that are owned by the Funds, and may be deemed to be the beneficial owner of the shares of the Issuer held by the Funds.
• All securities reported in this schedule are owned by the Funds; Dimensional disclaims beneficial ownership of such securities.
• The securities were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities.

Industry Context

This filing reflects a standard disclosure by a large institutional investment adviser regarding its passive ownership stake in a publicly traded company, common within the asset management industry.

Stakeholder Impact

• Shareholders: The presence of a significant institutional investor can lend credibility and stability to the shareholder base.
• Investment Professionals: Provides transparency regarding institutional ownership, which is valuable for market analysis and tracking institutional interest.

Key Dates

Keywords

Castle Biosciences Inc, Dimensional Fund Advisors LP, Schedule 13G, Beneficial Ownership, Common Stock, Investment Adviser, Institutional Investor, Passive Stake