YU JONATHAN YEN-WEN

PrivateCIK: 1951849
Location

WATERTOWN, MA

YU JONATHAN YEN-WEN (Chief Operating Officer) sold 14.3% of their position (9.10K shares) of DISC MEDICINE, INC. on the open market

Open‑market sale worth $755.9K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 2 sales
InsiderYU JONATHAN YEN-WENCIK 1951849
IssuerDISC MEDICINE, INC.CIK 1816736
Officer· Chief Operating Officer
Since Feb 2026
-9.10K
Net shares
Net seller
$755.9K
Total sold
2
Open market trades
0B · 2S
6
Total transactions
9.10K acquired · 18.19K disposed
Non-Derivative Transactions4

Common Stock

Direct
M · Option Exercise

Shares

+300.00

Price / share

$13.50

Trade value

$4.05K

% of position

0.6%
8/24/2026
54.32K54.62K

Common Stock

Direct
S · Sale

Shares

300.00

Price / share

$82.53

Trade value

$24.76K

% of position

0.5%
8/24/2026
54.62K54.32K

Common Stock

Direct
M · Option Exercise

Shares

+8.80K

Price / share

$13.50

Trade value

$118.75K

% of position

16.2%
8/25/2026
54.32K63.12K

Common Stock

Direct
S · Sale

Shares

8.80K

Price / share

$83.12

Trade value

$731.09K

% of position

13.9%
8/25/2026
63.12K54.32K
Total

Net shares

+0.00

Net value

-$633.06K

Derivative Transactions2

Stock Option (Right to Buy)

Direct
M · Option Exercise
Converts to

Common Stock

300.00 shares

Shares

300.00

Strike price

13.50

Held after

22.64K

Exercisable

8/24/2026

Stock Option (Right to Buy)

Direct
M · Option Exercise
Converts to

Common Stock

8.80K shares

Shares

8.80K

Strike price

13.50

Held after

13.85K

Exercisable

8/25/2026