![Derek Maetzold](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Derek Maetzold
Founder at
CASTLE BIOSCIENCES, INC.
Net worth: 5 M $ as of 2026-05-30
Profile
Derek J.
Maetzold is the founder of Castle Biosciences, Inc., founded in 2007, where the title held is President, Chief Executive Officer & Director.
Current jobs include Director at AltheaDx, Inc. since 2021, Director at Prelude Corp.
since 2022, Director at Ocular Melanoma Foundation, and Director at IMPACT Melanoma, Inc. Former jobs include Director & Associate Director-Marketing at Amylin Pharmaceuticals, Inc. from 1996 to 1998, Senior Director-Business Development at Schering-Plough Corp.
from 1999 to 2003, Associate Director-Marketing at Sandoz Pharmaceuticals Corp.
from 1985 to 1996, Vice President-Sales & Marketing at Encysive Pharmaceuticals, Inc. from 2003 to 2008, and Account Supervisor at Integrated Communications Corp.
from 1998 to 1999.
Education includes undergraduate studies at George Mason University.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-05-31 | 257,483 ( 0.85% ) | 5 M $ | 2026-05-30 |
Derek Maetzold active positions
| Companies | Position | Start |
|---|---|---|
| CASTLE BIOSCIENCES, INC. | Founder | 2007-08-31 |
| ALTHEADX INC | Director/Board Member | 2021-05-25 |
Ocular Melanoma Foundation
 Ocular Melanoma Foundation Investment Trusts/Mutual FundsMiscellaneous Operates as a charitable organization that provides eye cancer patient education and research funding services | Director/Board Member | - |
Prelude Corp.
 Prelude Corp. BiotechnologyHealth Technology Develops breast cancer tools to manage early stage breast cancer | Director/Board Member | 2022-02-01 |
Former positions of Derek Maetzold
| Companies | Position | End |
|---|---|---|
Encysive Pharmaceuticals, Inc.
 Encysive Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Discovers, develops and markets drugs for the treatment of cardiovascular, vascular and related inflammatory diseases | Sales & Marketing | 2008-04-30 |
Schering-Plough Corp.
 Schering-Plough Corp. Pharmaceuticals: MajorHealth Technology Manufactures and sells pharmaceutical & health care products | Corporate Officer/Principal | 2002-12-31 |
Integrated Communications Corp.
 Integrated Communications Corp. Advertising/Marketing ServicesCommercial Services Creates ads for pharmaceutical companies | Corporate Officer/Principal | 1998-12-31 |
Amylin Pharmaceuticals, Inc.
 Amylin Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Discovers, develops and commercializes medicines for diabetes, obesity and cardiovascular diseases | Director/Board Member | 1997-12-31 |
Sandoz Pharmaceuticals Corp. | Sales & Marketing | 1995-12-31 |
Training of Derek Maetzold
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
75
1st degree connections
10
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 10 |
|---|---|
Amylin Pharmaceuticals, Inc.
Amylin Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Discovers, develops and commercializes medicines for diabetes, obesity and cardiovascular diseases | Health Technology |
Schering-Plough Corp.
Schering-Plough Corp. Pharmaceuticals: MajorHealth Technology Manufactures and sells pharmaceutical & health care products | Health Technology |
Encysive Pharmaceuticals, Inc.
Encysive Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Discovers, develops and markets drugs for the treatment of cardiovascular, vascular and related inflammatory diseases | Health Technology |
Castle Biosciences, Inc.
 Castle Biosciences, Inc. Medical SpecialtiesHealth Technology Operates dermatological cancer company which provides clinically actionable genomic information to make accurate treatment decisions | Health Technology |
AltheaDx, Inc.
 AltheaDx, Inc. Medical SpecialtiesHealth Technology Operates as a commercial stage molecular diagnostics company | Health Technology |
Integrated Communications Corp.
Integrated Communications Corp. Advertising/Marketing ServicesCommercial Services Creates ads for pharmaceutical companies | Commercial Services |
George Mason University
 George Mason University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Sandoz Pharmaceuticals Corp. | |
Prelude Corp.
Prelude Corp. BiotechnologyHealth Technology Develops breast cancer tools to manage early stage breast cancer | Health Technology |
Ocular Melanoma Foundation
Ocular Melanoma Foundation Investment Trusts/Mutual FundsMiscellaneous Operates as a charitable organization that provides eye cancer patient education and research funding services | Miscellaneous |
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