YU JONATHAN YEN-WEN

PrivateCIK: 1951849
Location

WATERTOWN, MA

YU JONATHAN YEN-WEN (Chief Operating Officer) sold 15.2% of their position (9.70K shares) of DISC MEDICINE, INC. on the open market

Open‑market sale worth $704.8K — a significant reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale
InsiderYU JONATHAN YEN-WENCIK 1951849
IssuerDISC MEDICINE, INC.CIK 1816736
Officer· Chief Operating Officer
Since Feb 2026
-9.70K
Net shares
Net seller
$704.8K
Total sold
1
Open market trades
0B · 1S
3
Total transactions
9.70K acquired · 19.40K disposed
Non-Derivative Transactions2

Common Stock

Direct
M · Option Exercise

Shares

+9.70K

Price / share

$13.50

Trade value

$130.95K

% of position

17.9%
6/22/2026
54.32K64.02K

Common Stock

Direct
S · Sale

Shares

9.70K

Price / share

$72.66

Trade value

$704.80K

% of position

15.2%
6/22/2026
64.02K54.32K
Total

Net shares

+0.00

Net value

-$573.85K

Derivative Transactions1

Stock Option (Right to Buy)

Direct
M · Option Exercise
Converts to

Common Stock

9.70K shares

Shares

9.70K

Strike price

13.50

Held after

24.15K

Exercisable

6/22/2026