SEC Form 4 reporting owner

Yu Jonathan Yen-Wen

Yu Jonathan Yen-Wen has filed 13 Form 4 transactions reported between February 10, 2026 and August 25, 2026, as Chief Operating Officer of Disc Medicine, Inc..

Name as filed: Yu Jonathan Yen-Wen

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$1.5M

3 lines

Companies

with Form 4 filings

Latest transaction

Aug 25, 2026

transaction date

Roles and reported holdings

IRONDisc Medicine, Inc.
Feb 10, 2026 – Aug 25, 2026
Chief Operating Officer
Held directly54,324 sh as of Jun 16, 2026 · Form 4
24 months: $1.5M sold

Transaction history

All 13 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Aug 25, 2026	IRONChief Operating Officer	Option exerciseCode M · direct	8,796	$13.50	$119K@ $13.50	63,120	Form 4
Aug 24, 2026	IRONChief Operating Officer	Option exerciseCode M · direct	300	$13.50	$4K@ $13.50	54,624	Form 4
Aug 12, 2026	IRONChief Operating Officer	Option exerciseCode M · direct	804	$13.50	$11K@ $13.50	55,128	Form 4
Jul 7, 2026	IRONChief Operating Officer	Option exerciseCode M · direct	100	$13.50	$1K@ $13.50	54,424	Form 4
Jun 26, 2026	IRONChief Operating Officer	Option exerciseCode M · direct	300	$13.50	$4K@ $13.50	54,624	Form 4
Jun 22, 2026	IRONChief Operating Officer	Option exerciseCode M · direct	9,700	$13.50	$131K@ $13.50	64,024	Form 4
Jun 16, 2026	IRONChief Operating Officer	Open-market saleCode S · direct	6,961	$69.92	$487K@ $69.92	54,324	Form 4
Jun 16, 2026	IRONChief Operating Officer	Open-market saleCode S · direct	11,651	$68.76	$801K@ $68.76	61,285	Form 4
Jun 16, 2026	IRONChief Operating Officer	Option exerciseCode M · direct	13,351	$9.86	$132K@ $9.86	72,936	Form 4
Jun 16, 2026	IRONChief Operating Officer	Option exerciseCode M · direct	5,261	$9.86	$52K@ $9.86	59,585	Form 4
Feb 17, 2026	IRONChief Operating Officer	Open-market saleCode S · direct	3,231	$62.86	$203K@ $62.86	54,324	Form 4
Feb 10, 2026	IRONChief Operating Officer	Grant or awardCode A · direct	25,500	—	—	25,500	Form 4
Feb 10, 2026	IRONChief Operating Officer	Grant or awardCode A · direct	17,000	—	—	57,555	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.