SIBOLD WILLIAM JOHN

PrivateCIK: 1518611
Location

WEST CONSHOHOCKEN, PA

SIBOLD WILLIAM JOHN (President and CEO) sold 5.5% of their position (11.58K shares) of MADRIGAL PHARMACEUTICALS, INC. on the open market

Open‑market sale worth $6.24M — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 24 sales
InsiderSIBOLD WILLIAM JOHNCIK 1518611
DirectorOfficer· President and CEO
Since Mar 2026
-11.58K
Net shares
Net seller
$6.24M
Total sold
24
Open market trades
0B · 24S
24
Total transactions
11.58K disposed
Non-Derivative Transactions24

Common Stock

Direct
S · Sale

Shares

131.00

Price / share

$527.88

Trade value

$69.15K

% of position

0.1%
9/9/2026
209.33K209.20K

Common Stock

Direct
S · Sale

Shares

347.00

Price / share

$529.27

Trade value

$183.66K

% of position

0.2%
9/9/2026
209.20K208.85K

Common Stock

Direct
S · Sale

Shares

522.00

Price / share

$530.23

Trade value

$276.78K

% of position

0.2%
9/9/2026
208.85K208.33K

Common Stock

Direct
S · Sale

Shares

368.00

Price / share

$531.99

Trade value

$195.77K

% of position

0.2%
9/9/2026
208.33K207.96K

Common Stock

Direct
S · Sale

Shares

512.00

Price / share

$533.09

Trade value

$272.94K

% of position

0.2%
9/9/2026
207.96K207.45K

Common Stock

Direct
S · Sale

Shares

396.00

Price / share

$534.20

Trade value

$211.54K

% of position

0.2%
9/9/2026
207.45K207.05K

Common Stock

Direct
S · Sale

Shares

644.00

Price / share

$535.27

Trade value

$344.72K

% of position

0.3%
9/9/2026
207.05K206.41K

Common Stock

Direct
S · Sale

Shares

1.04K

Price / share

$536.11

Trade value

$557.56K

% of position

0.5%
9/9/2026
206.41K205.37K

Common Stock

Direct
S · Sale

Shares

640.00

Price / share

$537.17

Trade value

$343.79K

% of position

0.3%
9/9/2026
205.37K204.73K

Common Stock

Direct
S · Sale

Shares

520.00

Price / share

$538.30

Trade value

$279.91K

% of position

0.3%
9/9/2026
204.73K204.21K

Common Stock

Direct
S · Sale

Shares

215.00

Price / share

$539.03

Trade value

$115.89K

% of position

0.1%
9/9/2026
204.21K203.99K

Common Stock

Direct
S · Sale

Shares

505.00

Price / share

$540.19

Trade value

$272.80K

% of position

0.2%
9/9/2026
203.99K203.49K

Common Stock

Direct
S · Sale

Shares

362.00

Price / share

$541.65

Trade value

$196.08K

% of position

0.2%
9/9/2026
203.49K203.13K

Common Stock

Direct
S · Sale

Shares

160.00

Price / share

$542.55

Trade value

$86.81K

% of position

0.1%
9/9/2026
203.13K202.97K

Common Stock

Direct
S · Sale

Shares

60.00

Price / share

$533.09

Trade value

$31.99K

% of position

0.0%
9/11/2026
202.97K202.91K

Common Stock

Direct
S · Sale

Shares

106.00

Price / share

$534.06

Trade value

$56.61K

% of position

0.1%
9/11/2026
202.91K202.80K

Common Stock

Direct
S · Sale

Shares

218.00

Price / share

$535.94

Trade value

$116.84K

% of position

0.1%
9/11/2026
202.80K202.58K

Common Stock

Direct
S · Sale

Shares

160.00

Price / share

$537.62

Trade value

$86.02K

% of position

0.1%
9/11/2026
202.58K202.42K

Common Stock

Direct
S · Sale

Shares

687.00

Price / share

$540.59

Trade value

$371.38K

% of position

0.3%
9/11/2026
202.42K201.74K

Common Stock

Direct
S · Sale

Shares

368.00

Price / share

$541.64

Trade value

$199.32K

% of position

0.2%
9/11/2026
201.74K201.37K

Common Stock

Direct
S · Sale

Shares

1.20K

Price / share

$542.60

Trade value

$652.21K

% of position

0.6%
9/11/2026
201.37K200.17K

Common Stock

Direct
S · Sale

Shares

1.54K

Price / share

$544.02

Trade value

$837.25K

% of position

0.8%
9/11/2026
200.17K198.63K

Common Stock

Direct
S · Sale

Shares

761.00

Price / share

$544.83

Trade value

$414.62K

% of position

0.4%
9/11/2026
198.63K197.87K

Common Stock

Direct
S · Sale

Shares

120.00

Price / share

$546.38

Trade value

$65.57K

% of position

0.1%
9/11/2026
197.87K197.75K
Total

Net shares

11.58K

Net value

-$6.24M

Derivative Transactions0
No derivative transactions reported
SIBOLD WILLIAM JOHN — Insider Transaction (Form 4) Filed Sep 11, 2026 | Finecho