O'BRIEN PATRICK

PrivateCIK: 1627183
Location

PASADENA, CA

O'BRIEN PATRICK (General Counsel) sold 9.4% of their position (49.49K shares) of ARROWHEAD PHARMACEUTICALS, INC. on the open market

Open‑market sale worth $3.12M — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 12 sales
InsiderO'BRIEN PATRICKCIK 1627183
Officer· General Counsel
Since Jan 2019
-52.29K
Net shares
Net seller
$3.12M
Total sold
12
Open market trades
0B · 12S
17
Total transactions
52.29K disposed
Non-Derivative Transactions17

Common Stock

Direct
G · Gift

Shares

560.00

Price / share

Trade value

% of position

0.1%
12/31/2025
527.20K526.64K

Common Stock

Direct
G · Gift

Shares

560.00

Price / share

Trade value

% of position

0.1%
12/31/2025
526.64K526.08K

Common Stock

Direct
G · Gift

Shares

560.00

Price / share

Trade value

% of position

0.1%
12/31/2025
526.08K525.52K

Common Stock

Direct
G · Gift

Shares

560.00

Price / share

Trade value

% of position

0.1%
12/31/2025
525.52K524.96K

Common Stock

Direct
G · Gift

Shares

560.00

Price / share

Trade value

% of position

0.1%
12/31/2025
524.96K524.40K

Common Stock

Direct
S · Sale

Shares

4.37K

Price / share

$61.20

Trade value

$267.32K

% of position

0.8%
1/5/2026
524.40K520.03K

Common Stock

Direct
S · Sale

Shares

6.16K

Price / share

$62.23

Trade value

$383.59K

% of position

1.2%
1/5/2026
520.03K513.87K

Common Stock

Direct
S · Sale

Shares

13.45K

Price / share

$62.96

Trade value

$846.87K

% of position

2.6%
1/5/2026
513.87K500.42K

Common Stock

Direct
S · Sale

Shares

11.84K

Price / share

$63.84

Trade value

$755.99K

% of position

2.4%
1/5/2026
500.42K488.58K

Common Stock

Direct
S · Sale

Shares

2.70K

Price / share

$64.44

Trade value

$173.99K

% of position

0.6%
1/5/2026
488.58K485.88K

Common Stock

Direct
S · Sale

Shares

900.00

Price / share

$66.01

Trade value

$59.41K

% of position

0.2%
1/5/2026
485.88K484.98K

Common Stock

Direct
S · Sale

Shares

313.00

Price / share

$68.00

Trade value

$21.28K

% of position

0.1%
1/5/2026
484.98K484.66K

Common Stock

Direct
S · Sale

Shares

600.00

Price / share

$61.12

Trade value

$36.67K

% of position

0.1%
1/5/2026
484.66K484.06K

Common Stock

Direct
S · Sale

Shares

900.00

Price / share

$62.25

Trade value

$56.02K

% of position

0.2%
1/5/2026
484.06K483.16K

Common Stock

Direct
S · Sale

Shares

5.87K

Price / share

$62.91

Trade value

$369.47K

% of position

1.2%
1/5/2026
483.16K477.29K

Common Stock

Direct
S · Sale

Shares

2.34K

Price / share

$64.04

Trade value

$149.60K

% of position

0.5%
1/5/2026
477.29K474.95K

Common Stock

Direct
S · Sale

Shares

46.00

Price / share

$68.00

Trade value

$3.13K

% of position

0.0%
1/5/2026
474.95K474.91K
Total

Net shares

52.29K

Net value

-$3.12M

Derivative Transactions0
No derivative transactions reported
O'BRIEN PATRICK — Insider Transaction (Form 4) Filed Jan 5, 2026 | Finecho