Company: CSTL
Filing Date: 2025-04-09
Form Type: DEF 14A
Source: 0001447362-25-000054
Chunk: 97

Company: CASTLE BIOSCIENCES INC
Filing Date: 2025-04-09
Form: DEF 14A
Chunk 97
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 common stock on April 26, 2022 of $22.40 per share.

As of December 31, 2024, the milestone period ended, and no future obligations remain for AltheaDx earnout payments, with the contingent consideration liability determined to be zero. The named related parties above did not receive additional contingent consideration over the duration of the milestone and contingent consideration period.

#### Castle Biosciences 2025 Proxy Statement87
| Householding of Proxy Materials |

The SEC has adopted rules that permit companies and intermediaries (e.g., brokers) to satisfy the delivery requirements for meeting materials with respect to two or more stockholders sharing the same address by delivering a single set of meeting materials addressed to those stockholders. This process, which is commonly referred to as “householding,” potentially means extra convenience for stockholders and cost savings for companies.

For this meeting, a number of brokers with account holders who are Castle stockholders will be “householding” the Company’s proxy materials. A single set of meeting materials will be delivered to multiple stockholders sharing an address unless contrary instructions have been received from the affected stockholders. Once you have received notice from your broker that they will be “householding” communications to your address, “householding” will continue until you are notified otherwise or until you revoke your consent. If, at any time, you no longer wish to participate in “householding” and would prefer to receive a separate Notice of Internet Availability Proxy Materials, please notify your broker or Castle. Direct your written request to Castle Biosciences, Inc., 505 S. Friendswood Drive, Suite 401, Friendswood, Texas 77546, Attn: Corporate Secretary or call us at (866) 788-9007. If you are receiving more than one copy of the proxy materials at a single address and would like to participate in householding, please contact the bank, broker or other organization that holds your shares to request information about eliminating duplicate mailings.

#### 88Castle Biosciences 2025 Proxy Statement
| Annual Report on Form 10-K |

Our reports on Forms 10-K, 10-Q, 8-K and all amendments to those reports are available without charge on our website at www.CastleBiosciences.com on the “Company” page by selecting “Investors,” “Financials,” and then “Annual Reports,” as soon as reasonably practicable after they are electronically filed with, or furnished to, the SEC. You may request a copy