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Jonathan Yen-Wen Yu

CIK 1951849 · Chief Operating Officer · last filed 2026-08-26

Jonathan Yen-Wen Yu is a Chief Operating Officer who has filed 17 SEC Form 4 insider transactions across 1 company since 2024. The most recent filing, for IRON, was dated Aug 26, 2026. Across all open-market trades the lifetime net is −$5.7M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $4.3M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$4.33M

Companies

1

Total Filings

17

Lifetime Open-Market Net

-$5.66M

Filer Profile

Reported Address
C/O DISC MEDICINE, INC.
321 ARSENAL STREET, SUITE 101
WATERTOWN, MA 02472
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
IRON Chief Operating Officer 54,624 $79.23 $4.33M -$5.66M 11 2026-08-26

Recent Filings

17 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-08-26 IRON Mixed — -$633.1K EDGAR
2026-08-14 IRON Mixed — -$55.6K EDGAR
2026-07-09 IRON Mixed — -$6.9K EDGAR
2026-07-07 IRON Notice (144) −10,000 -$770.1K EDGAR
2026-06-24 IRON Mixed — -$573.8K EDGAR
2026-06-22 IRON Notice (144) −10,000 -$707.9K EDGAR
2026-06-18 IRON Mixed — -$1.10M EDGAR
2026-06-16 IRON Notice (144) −18,612 -$1.30M EDGAR
2026-02-17 IRON Sell (S) −3,231 -$203.1K EDGAR
2026-02-17 IRON Notice (144) −3,231 -$180.8K EDGAR
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.