Who are Castle Biosciences, Inc.'s main suppliers?

Castle Biosciences, Inc. (CSTL) key suppliers include: SCIBASE, NORIDIAN-HEALTHCARE-SOLUTIONS-LLC, Myriad Genetics, Inc.. View the full supplier network at chainsifter.com/chain/CSTL.

Who are Castle Biosciences, Inc.'s major customers?

Castle Biosciences, Inc. (CSTL) key customers include: MEDICARE, COMMERCIAL-PAYOR. View the full customer network at chainsifter.com/chain/CSTL.

What sector is Castle Biosciences, Inc. in?

Castle Biosciences, Inc. (CSTL) operates in the general sector. ChainSifter tracks its verified supply chain relationships including suppliers, customers, and strategic partners.

Castle Biosciences, Inc. Suppliers, Customers & Supply Chain (CSTL)

3Suppliers

2Customers

3Debt Items

20Related Chains

Source-Backed Evidence Depth

Castle Biosciences, Inc. (CSTL) is shown with relationship data already present in ChainSifter's database. Counts below come from stored supply-chain records and filing/source URLs where available; missing source URLs are not filled in or estimated.

9Total relationships

3Distinct source URLs

8High confidence

0.863Average confidence

2026-10-28Latest database update

ChainSifter does not infer unreported suppliers, customers, ownership, acquisitions, debt exposure, revenue dependency, or future supply-chain events on this public page.

Castle Biosciences, Inc. Suppliers

Ticker	Name	Confidence	Evidence
SCIBASE	SCIBASE	90%	SciBase is entitled to royalties on our product sales, a mark-up on product sales to us, and a milestone payment upon achieving specified sales thresholds.
NORIDIAN-HEALTHCARE-SOLUTIONS-LLC	NORIDIAN-HEALTHCARE-SOLUTIONS-LLC	80%	The MAC responsible for administering claims for laboratory services located in Arizona is Noridian Healthcare Solutions, LLC ("Noridian").
MYGN	Myriad Genetics, Inc.	72%	Reciprocal relationship from MYGN graph: Reciprocal relationship from CSTL graph: Reciprocal relationship from MYGN graph: Reciprocal relationship from CSTL graph: Reciprocal relationship from MYGN g…

Castle Biosciences, Inc. Customers

Ticker	Name	Confidence	Evidence
MEDICARE	MEDICARE	90%	Our revenue from patients covered by Medicare as a percentage of total revenue, was 47 % for the year ended December 31, 2024.
COMMERCIAL-PAYOR	COMMERCIAL-PAYOR	85%	Additionally, there was a commercial payor from which 15 % of our revenue from patients was derived for the year ended December 31, 2024.

Castle Biosciences, Inc. Debt Obligations

Instrument	Description	Confidence	Evidence
CSTL-DEBT	Debt stack $10.1M	90%	Market cache reports total debt of $10.1M.
CSTL-DEBT-8893	Xbrl Convertible	90%	xbrl convertible detail from xbrl 2020-12-31.
CSTL-DEBT-8892	Warrants outstanding: 403142	90%	xbrl warrant detail from xbrl 2020-12-31.

Castle Biosciences, Inc. Acquisitions

No acquisitions on recordNo completed or pending acquisitions found in our database for Castle Biosciences, Inc..

Castle Biosciences, Inc. Ownership

Holder	Name	Confidence	Evidence
CSTL-OWNER-BLACKROCK-INC	BlackRock, Inc.	90%	13F overlay lists BlackRock, Inc. as top holder; 190 tracked holders.

Castle Biosciences, Inc. Extended Supply Chain Network

Ticker	Name	Chain Index	Hops	Relationship Types
MYGN	Myriad Genetics, Inc.	100.00	1	['supplier']
BIOA	BioAge Labs, Inc.	50.00	2
FLGT	Fulgent Genetics, Inc.	50.00	2
DSGN	Design Therapeutics, Inc.	50.00	2
BNTC	Benitec Biopharma Inc.	50.00	2
CALC	CalciMedica, Inc.	50.00	2
ALLO	Allogene Therapeutics, Inc.	50.00	2
CTMX	CytomX Therapeutics, Inc.	50.00	2
CABA	Cabaletta Bio, Inc.	50.00	2
SDGR	Schrödinger, Inc.	50.00	2
BCDA	BioCardia, Inc.	50.00	2
ELVN	Enliven Therapeutics, Inc.	50.00	2
ATYR	aTyr Pharma, Inc.	50.00	2
BIAF	bioAffinity Technologies, Inc.	50.00	2
BNR	Burning Rock Biotech Limited	50.00	2
IMNM	Immunome, Inc.	50.00	2
PSNL	Personalis, Inc.	50.00	2
HOWL	Werewolf Therapeutics, Inc.	50.00	2
GH	Guardant Health, Inc.	50.00	2
BNBX	BNB Plus Corp.	50.00	2

Castle Biosciences, Inc. Supply Chain