SummitTX Capital, L.P.

Position in CSTL — Castle Biosciences Inc

CIK 2052310 FORT WORTH, TX

Position in CSTL

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$1,645,660

+$968,411 QoQ

Shares Held

67,033

+285.0% QoQ

Ownership

0.221%

of shares outstanding

% of Portfolio

0.05%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Sep 2025

3 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Healthcare · as of Mar 31, 2026

SummitTX Capital, L.P. holds $5,210,065 across 5 Diagnostics & Research names. CSTL ranks #1 (31.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CSTL	Castle Biosciences Inc This page	67,033	$1,645,660
2	ADPT	Adaptive Biotechnologies Corp	317,624	$1,102,155
3	A	Agilent Technologies, Inc.	9,525	$1,085,659
4	RVTY	Revvity, Inc.	11,512	$1,008,566
5	IQV	Iqvia Holdings Inc.	2,158	$368,025

3 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$1,645,660	67,033	+285.0%	Shares	Sole	2026-05-15
2025-12-31	$677,249	17,410	-61.3%	Shares	Sole	2026-02-17
2025-09-30	$1,024,650	45,000	—	Shares	Defined	2025-11-14
No filing history on record for this holder in this stock.