WASATCH ADVISORS LP

Position in BLLN — BillionToOne, Inc.

CIK 814133 SALT LAKE CITY, UT

Position in BLLN

as of Jun 30, 2026 · filed Jul 10, 2026 Compact

Position Value

$62,159,718

+$32,980,495 QoQ

Shares Held

518,084

+40.2% QoQ

Ownership

1.13%

of shares outstanding

% of Portfolio

0.41%

of 13F equity value

Holder Rank

of 5 holders

Holding Since

Mar 2026

2 quarters on record

Voting authority Sole 67.53171300406883.ToString("F0")% Shared 0.ToString("F0")% None 32.46828699593116.ToString("F0")%

Healthcare · as of Jun 30, 2026

WASATCH ADVISORS LP holds $421,872,903 across 5 Diagnostics & Research names. BLLN ranks #2 (14.7% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	MEDP	Medpace Holdings, Inc.	636,595	$337,134,346
2	BLLN	BillionToOne, Inc. This page	518,084	$62,159,718
3	ADPT	Adaptive Biotechnologies Corp	576,266	$12,360,905
4	CSTL	Castle Biosciences Inc	279,349	$6,662,473
5	DGX	Quest Diagnostics Inc	16,775	$3,555,461

2 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$62,159,718	518,084	+40.2%	Shares	Sole	2026-07-10
2026-03-31	$29,179,223	369,638	—	Shares	Sole	2026-04-21
No filing history on record for this holder in this stock.