SEC Form 4 reporting owner

Lynch Thomas P.

Lynch Thomas P. has filed 21 Form 4 transactions reported between September 8, 2026 and September 17, 2026, as a reporting owner of BillionToOne, Inc..

Name as filed: Lynch Thomas P.

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$2.0M

13 lines

Companies

with Form 4 filings

Latest transaction

Sep 17, 2026

transaction date

Roles and reported holdings

BLLNBillionToOne, Inc.
Sep 8, 2026 – Sep 17, 2026
Reporting owner
Held directly700 sh as of Sep 8, 2026 · Form 4
24 months: $2.0M sold

Transaction history

All 21 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Sep 17, 2026	BLLN	Option exerciseCode M · direct	5,840	$30.78	$180K@ $30.78	35,812	Form 4
Sep 17, 2026	BLLN	Option exerciseCode M · direct	2,920	$17.12	$50K@ $17.12	29,972	Form 4
Sep 17, 2026	BLLN	Option exerciseCode M · direct	6,968	$11.55	$80K@ $11.55	27,052	Form 4
Sep 17, 2026	BLLN	Option exerciseCode M · direct	19,384	$8.65	$168K@ $8.65	20,084	Form 4
Sep 8, 2026	BLLN	Open-market saleCode S · direct	232	$100.92	$23K@ $100.92	700	Form 4
Sep 8, 2026	BLLN	Open-market saleCode S · direct	2,518	$100.20	$252K@ $100.20	932	Form 4
Sep 8, 2026	BLLN	Open-market saleCode S · direct	576	$98.89	$57K@ $98.89	3,450	Form 4
Sep 8, 2026	BLLN	Open-market saleCode S · direct	147	$101.41	$15K@ $101.41	4,026	Form 4
Sep 8, 2026	BLLN	Open-market saleCode S · direct	1,131	$100.33	$113K@ $100.33	4,173	Form 4
Sep 8, 2026	BLLN	Open-market saleCode S · direct	385	$99.22	$38K@ $99.22	5,304	Form 4
Sep 8, 2026	BLLN	Open-market saleCode S · direct	358	$100.82	$36K@ $100.82	5,689	Form 4
Sep 8, 2026	BLLN	Open-market saleCode S · direct	2,997	$100.11	$300K@ $100.11	6,047	Form 4
Sep 8, 2026	BLLN	Open-market saleCode S · direct	614	$99.00	$61K@ $99.00	9,044	Form 4
Sep 8, 2026	BLLN	Open-market saleCode S · direct	775	$100.83	$78K@ $100.83	9,658	Form 4
Sep 8, 2026	BLLN	Open-market saleCode S · direct	8,285	$100.12	$830K@ $100.12	10,433	Form 4
Sep 8, 2026	BLLN	Open-market saleCode S · direct	1,944	$98.97	$192K@ $98.97	18,718	Form 4
Sep 8, 2026	BLLN	Open-market saleCode S · direct	38	$96.47	$4K@ $96.47	20,662	Form 4
Sep 8, 2026	BLLN	Option exerciseCode M · direct	3,326	$30.78	$102K@ $30.78	20,700	Form 4
Sep 8, 2026	BLLN	Option exerciseCode M · direct	1,663	$17.12	$28K@ $17.12	17,374	Form 4
Sep 8, 2026	BLLN	Option exerciseCode M · direct	3,969	$11.55	$46K@ $11.55	15,711	Form 4
Sep 8, 2026	BLLN	Option exerciseCode M · direct	11,042	$8.65	$96K@ $8.65	11,742	Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.