Company · Ownership research

ARROWHEAD PHARMACEUTICALS, INC. ARWR

CIK 0000879407

Form 4 transactions dated Nov 1, 2023 to Nov 9, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

Insider filings on file run through Aug 20, 2026.

Insider purchases & sales

Purchased: $82.99K
Sold: $59.65M

Nov 1, 2023 – Aug 20, 2026
Available records · partial months are marked ·

20269 of 9 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
Aug 18, 2026	PERRY MICHAEL S Director	Sale	$1.01M 11,600 shares sold	9.43% sold Direct holding	▾
Aug 18, 2026	OLUKOTUN ADEOYE Y Director	Sale	$173.92K 2,000 shares sold	5.95% sold Direct holding	▾
May 12, 2026	Lu Hongbo Director	Sale10b5-1 footnote	$228.33K 2,970 shares sold	5.40% sold Direct holding	▾
Apr 23, 2026	Hamilton James C Chief Medical Officer	Sale10b5-1 footnote	$750.00K 10,000 shares sold	4.22% sold Direct holding	▾
Apr 22, 2026	Apel Daniel Joseph Chief Financial Officer	Sale10b5-1 footnote	$934.29K 13,095 shares sold	7.44% sold Direct holding	▾
Mar 5, 2026	Hamilton James C Chief Medical Officer	Sale10b5-1 footnote	$641.90K 10,000 shares sold	4.05% sold Direct holding	▾
Jan 5, 2026	Hamilton James C Chief Medical Officer	Sale10b5-1 footnote	$2.53M 40,164 shares sold	18.93% sold Direct holding	▾
Jan 5, 2026	O'Brien Patrick COO	Sale10b5-1 footnote	$3.12M 49,493 shares sold	9.44% sold Direct holding	▾
Jan 2, 2026	Anzalone Christopher Richard Chief Executive Officer · Director	Sale10b5-1 footnote	$871.70K 13,187 shares sold	0.35% sold Direct holding	▾

Showing 9 / 9 record groups in 2026. The complete set is available through the API.

ARROWHEAD PHARMACEUTICALS, INC. · ARWR

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 9 of 9 purchase / sale groups and 5 of 5 other groups; the totals and the monthly series cover the whole window.

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{"action":"list","ticker":"ARWR","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Share totals are on today's split-adjusted basis. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.