The Filings Report

Arrowhead Research Corporation insider trading

ARWRfinancial statementsForm 4 filings on EDGAR137 transactions since Nov 9, 2024

From August 12, 2026 to November 9, 2026, 0 insiders at Arrowhead Research Corporation bought $0 of stock in the open market, and 2 sold $1M. Officers and directors accounted for $0 of purchases and $1M of sales. The last reported transaction was an open-market sale by Olukotun Adeoye Y on August 18, 2026.

The answer card and chart use the same period. Change the range above the chart to update both. Form 4 filings through August 20, 2026; awards, option exercises, tax withholding and gifts are excluded from these totals.

Stock price and insider activity

Daily price candles with insider purchases and sales directly beneath them on the same timeline. Bars show individual days; totals sum all days in the selected period.

ARWR daily priceSplit-adjusted prices in US dollars

Bought $0Sold $1MAug 12, 2026 – Nov 9, 2026

Nov 9, 2026O $52.49 · H $53.63 · L $46.45 · C $49.24Bought $0 (0)Sold $0 (0)
$44$56$69$81$932026-08-12: open $89.09, high $90.61, low $87.16, close $87.252026-08-13: open $87.60, high $88.06, low $84.76, close $85.592026-08-14: open $84.75, high $87.17, low $83.78, close $86.642026-08-17: open $86.44, high $88.94, low $86.26, close $88.702026-08-18: open $87.72, high $88.35, low $85.98, close $87.902026-08-19: open $89.51, high $90.00, low $87.58, close $89.412026-08-20: open $88.23, high $88.45, low $85.90, close $87.472026-08-21: open $87.90, high $88.46, low $85.94, close $87.112026-08-24: open $86.77, high $87.01, low $85.50, close $86.732026-08-25: open $88.00, high $90.21, low $87.95, close $88.882026-08-26: open $88.45, high $89.83, low $86.80, close $89.122026-08-27: open $89.59, high $89.59, low $88.06, close $88.592026-08-28: open $87.99, high $88.25, low $84.20, close $84.912026-08-31: open $83.13, high $83.76, low $80.75, close $82.392026-09-01: open $81.14, high $83.27, low $80.76, close $82.742026-09-02: open $82.87, high $85.47, low $82.09, close $85.372026-09-03: open $85.18, high $86.79, low $83.46, close $86.492026-09-04: open $85.87, high $86.96, low $84.20, close $86.342026-09-08: open $84.22, high $86.96, low $83.54, close $85.112026-09-09: open $84.65, high $87.20, low $82.23, close $82.632026-09-10: open $81.58, high $83.38, low $80.33, close $82.762026-09-11: open $83.75, high $85.98, low $82.36, close $82.852026-09-14: open $82.98, high $83.27, low $79.93, close $80.672026-09-15: open $82.89, high $83.55, low $70.61, close $70.672026-09-16: open $70.41, high $71.93, low $64.50, close $65.792026-09-17: open $68.91, high $68.91, low $67.00, close $67.742026-09-18: open $67.83, high $68.05, low $66.36, close $66.482026-09-21: open $67.46, high $69.19, low $66.06, close $68.792026-09-22: open $68.85, high $72.37, low $68.08, close $71.862026-09-23: open $72.16, high $72.49, low $66.27, close $66.962026-09-24: open $67.00, high $67.45, low $65.46, close $66.072026-09-25: open $66.50, high $67.44, low $65.40, close $65.922026-09-28: open $65.00, high $66.08, low $63.99, close $65.462026-09-29: open $65.46, high $66.83, low $64.57, close $66.252026-09-30: open $66.80, high $66.80, low $65.09, close $65.452026-10-01: open $65.00, high $65.76, low $64.50, close $64.792026-10-02: open $65.57, high $66.16, low $63.99, close $64.192026-10-05: open $64.76, high $64.76, low $62.22, close $62.352026-10-06: open $62.86, high $63.19, low $60.56, close $61.542026-10-07: open $61.63, high $62.75, low $60.78, close $61.482026-10-08: open $60.54, high $61.13, low $59.21, close $60.742026-10-09: open $60.72, high $62.99, low $60.44, close $62.752026-10-12: open $62.49, high $62.50, low $60.48, close $60.732026-10-13: open $60.04, high $60.73, low $58.08, close $58.132026-10-14: open $58.48, high $60.53, low $57.15, close $58.372026-10-15: open $58.50, high $59.40, low $57.40, close $58.502026-10-16: open $58.45, high $58.45, low $55.83, close $55.902026-10-19: open $56.96, high $57.30, low $56.05, close $57.232026-10-20: open $56.93, high $59.57, low $56.92, close $58.922026-10-21: open $59.72, high $60.46, low $58.82, close $58.842026-10-22: open $58.06, high $59.90, low $56.97, close $58.362026-10-23: open $58.15, high $58.40, low $56.56, close $58.022026-10-26: open $58.43, high $59.63, low $58.17, close $58.982026-10-27: open $59.02, high $60.56, low $58.01, close $59.032026-10-28: open $58.64, high $60.24, low $58.20, close $60.212026-10-29: open $60.74, high $61.88, low $59.75, close $60.492026-10-30: open $59.75, high $61.50, low $58.75, close $59.902026-11-02: open $60.55, high $61.17, low $59.41, close $59.572026-11-03: open $59.39, high $60.89, low $59.25, close $59.532026-11-04: open $61.75, high $62.00, low $59.06, close $61.652026-11-05: open $61.65, high $61.73, low $57.24, close $57.462026-11-06: open $58.21, high $58.71, low $57.00, close $58.162026-11-09: open $52.49, high $53.63, low $46.45, close $49.24Insider purchases / sales · USD$2M$0−$2M2026-08-18: 0 purchases ($0), 2 sales ($1M)Aug 12Sep 3Sep 25Oct 19Nov 9

purchases above zero; sales below. Both use the transaction date and the same dollar scale. Hover, tap, or use arrow keys to inspect a date. Awards, exercises, tax withholding and gifts are excluded.

Dates with prices or insider activity are spaced evenly; empty weekends and holidays are omitted. Prices through Nov 9, 2026. Insider data through Nov 9, 2026. Prices are adjusted for splits; transaction values are reported dollars.

Every transaction

137 transactions from November 9, 2024 to November 9, 2026, newest first. Open-market purchases and sales are coloured; awards, exercises, tax withholding and gifts are grey and not counted.

TradedInsiderRoleTransactionSharesPriceValueHeld afterFiled
Aug 18, 2026Olukotun Adeoye YDirectoropen-market sale2,000$86.96$174K31,600Aug 20, 2026
Aug 18, 2026Perry Michael SDirectoropen-market sale11,600$87.30$1M111,459Aug 20, 2026
Jun 15, 2026Cohen Matthew GregoryDirectoraward11,882$0.00—11,882Jun 17, 2026
May 12, 2026Lu HongboDirectoropen-market sale10b5-12,970$76.88$228K52,012May 14, 2026
Apr 23, 2026Hamilton James CChief Medical Officeropen-market sale10b5-110,000$75.00$750K226,958Apr 24, 2026
Apr 22, 2026Apel Daniel JosephChief Financial Officeropen-market sale10b5-13,208$70.11$225K172,792Apr 24, 2026
Apr 22, 2026Apel Daniel JosephChief Financial Officeropen-market sale10b5-11,157$70.45$82K171,635Apr 24, 2026
Apr 22, 2026Apel Daniel JosephChief Financial Officeropen-market sale10b5-18,730$71.92$628K162,905Apr 24, 2026
Mar 5, 2026Hamilton James CChief Medical Officeropen-market sale10b5-110,000$64.19$642K236,958Mar 9, 2026
Jan 6, 2026Hamilton James CChief Medical Officeraward75,000$0.00—246,958Jan 8, 2026
Jan 6, 2026Apel Daniel JosephChief Financial Officeraward75,000$0.00—176,200Jan 8, 2026
Jan 6, 2026O'Brien PatrickCOOgift540$0.00—473,288Jan 8, 2026
Jan 6, 2026O'Brien PatrickCOOaward75,000$0.00—547,408Jan 8, 2026
Jan 6, 2026O'Brien PatrickCOOgift440$0.00—472,408Jan 8, 2026
Jan 6, 2026O'Brien PatrickCOOgift540$0.00—473,828Jan 8, 2026
Jan 6, 2026O'Brien PatrickCOOgift540$0.00—474,368Jan 8, 2026
Jan 6, 2026O'Brien PatrickCOOgift440$0.00—472,848Jan 8, 2026
Jan 5, 2026O'Brien PatrickCOOopen-market sale10b5-146$68.00$3K474,908Jan 5, 2026
Jan 5, 2026O'Brien PatrickCOOopen-market sale10b5-14,368$61.20$267K520,033Jan 5, 2026
Jan 5, 2026O'Brien PatrickCOOopen-market sale10b5-16,164$62.23$384K513,869Jan 5, 2026
Jan 5, 2026O'Brien PatrickCOOopen-market sale10b5-113,451$62.96$847K500,418Jan 5, 2026
Jan 5, 2026O'Brien PatrickCOOopen-market sale10b5-111,842$63.84$756K488,576Jan 5, 2026
Jan 5, 2026O'Brien PatrickCOOopen-market sale10b5-12,700$64.44$174K485,876Jan 5, 2026
Jan 5, 2026O'Brien PatrickCOOopen-market sale10b5-1900$66.01$59K484,976Jan 5, 2026
Jan 5, 2026O'Brien PatrickCOOopen-market sale10b5-1313$68.00$21K484,663Jan 5, 2026
Jan 5, 2026O'Brien PatrickCOOopen-market sale10b5-1600$61.12$37K484,063Jan 5, 2026
Jan 5, 2026O'Brien PatrickCOOopen-market sale10b5-1900$62.25$56K483,163Jan 5, 2026
Jan 5, 2026O'Brien PatrickCOOopen-market sale10b5-15,873$62.91$369K477,290Jan 5, 2026
Jan 5, 2026O'Brien PatrickCOOopen-market sale10b5-12,336$64.04$150K474,954Jan 5, 2026
Jan 5, 2026Hamilton James CChief Medical Officeropen-market sale10b5-14,625$61.24$283K207,497Jan 5, 2026
Jan 5, 2026Hamilton James CChief Medical Officeropen-market sale10b5-16,090$62.28$379K201,407Jan 5, 2026
Jan 5, 2026Hamilton James CChief Medical Officeropen-market sale10b5-114,792$63.01$932K186,615Jan 5, 2026
Jan 5, 2026Hamilton James CChief Medical Officeropen-market sale10b5-1309$68.00$21K171,958Jan 5, 2026
Jan 5, 2026Hamilton James CChief Medical Officeropen-market sale10b5-11,200$64.49$77K172,704Jan 5, 2026
Jan 5, 2026Hamilton James CChief Medical Officeropen-market sale10b5-1437$65.97$29K172,267Jan 5, 2026
Jan 5, 2026Hamilton James CChief Medical Officeropen-market sale10b5-112,711$63.95$813K173,904Jan 5, 2026
Jan 2, 2026Anzalone Christopher RichardChief Executive Officer, Directoropen-market sale10b5-15,771$66.39$383K4MJan 5, 2026
Jan 2, 2026Anzalone Christopher RichardChief Executive Officer, Directoropen-market sale10b5-17,416$65.88$489K4MJan 5, 2026
Dec 31, 2025O'Brien PatrickCOOgift560$0.00—526,641Jan 5, 2026
Dec 31, 2025O'Brien PatrickCOOgift560$0.00—525,521Jan 5, 2026
Dec 31, 2025O'Brien PatrickCOOgift560$0.00—524,961Jan 5, 2026
Dec 31, 2025O'Brien PatrickCOOgift560$0.00—524,401Jan 5, 2026
Dec 31, 2025O'Brien PatrickCOOgift560$0.00—526,081Jan 5, 2026
Dec 29, 2025Anzalone Christopher RichardChief Executive Officer, Directoropen-market sale10b5-116,545$68.69$1M4MDec 30, 2025
Dec 29, 2025Anzalone Christopher RichardChief Executive Officer, Directoropen-market sale10b5-135,181$69.33$2M4MDec 30, 2025
Dec 29, 2025Anzalone Christopher RichardChief Executive Officer, Directoroption exercise16,545$6.15$102K4MDec 30, 2025
Dec 29, 2025Anzalone Christopher RichardChief Executive Officer, Directoroption exercise35,181$6.15$216K4MDec 30, 2025
Dec 26, 2025Ferrari MauroDirectoropen-market sale10b5-17,530$70.00$527K69,053Dec 30, 2025
Dec 22, 2025Anzalone Christopher RichardChief Executive Officer, Directoropen-market sale10b5-12,574$68.85$177K4MDec 23, 2025
Dec 22, 2025Anzalone Christopher RichardChief Executive Officer, Directoropen-market sale10b5-110,012$68.33$684K4MDec 23, 2025

Who the insiders are

Everyone who reported a transaction since November 9, 2024, by open-market value over twelve months. Shares held are after the insider’s latest directly held transaction.

InsiderRoleLast transactionKindShares heldBought, 12 monthsSold, 12 monthsSales under a plan
Anzalone Christopher RichardChief Executive Officer, DirectorJan 2, 2026open-market sale4M—$24M (25)9 of 25
Hamilton James CChief Medical OfficerApr 23, 2026open-market sale226,958—$4M (9)9 of 9
O'Brien PatrickCOOJan 6, 2026gift473,288—$3M (12)12 of 12
Perry Michael SDirectorAug 18, 2026open-market sale111,459—$2M (2)0 of 2
Ferrari MauroDirectorDec 26, 2025open-market sale69,053—$1M (2)1 of 2
Apel Daniel JosephChief Financial OfficerApr 22, 2026open-market sale172,792—$934K (3)3 of 3
Olukotun Adeoye YDirectorAug 18, 2026open-market sale31,600—$851K (4)3 of 4
Vakiener VictoriaDirectorDec 19, 2025open-market sale42,964—$679K (3)3 of 3
Waddill William D.DirectorDec 19, 2025open-market sale57,063—$566K (3)3 of 3
Lu HongboDirectorMay 12, 2026open-market sale52,012—$228K (1)1 of 1
Myszkowski Kenneth AllenChief Financial OfficerJan 7, 2025open-market sale455,433———
Ingram Douglas SDirectorDec 16, 2025award46,215———
Given Douglas BDirectorDec 17, 2024open-market sale124,167———
Cohen Matthew GregoryDirectorJun 15, 2026award11,882———

Questions

Are Arrowhead Research Corporation insiders buying or selling?

Over the twelve months to November 9, 2026, 10 insiders at Arrowhead Research Corporation sold $37M of stock in the open market, all by officers and directors, and no insider bought. Net, insiders sold $37M. Only open-market purchases and sales are counted.

Who sold the most Arrowhead Research Corporation stock in the last year?

Anzalone Christopher Richard (Chief Executive Officer, Director) sold $24M in 25 open-market sales over the twelve months to November 9, 2026.

Do Arrowhead Research Corporation executives sell under 10b5-1 plans?

44 of the 64 open-market sales in the last twelve months (69%) were reported as made under a Rule 10b5-1 trading plan, set up in advance. A sale under a plan is still counted as a sale.

What counts as insider buying here?

Only open-market purchases (Form 4 code P) and sales (code S) by officers, directors and 10% owners. Stock awards, option exercises, shares withheld for tax and gifts are listed in the table but never counted as buying or selling.

More on Arrowhead Research Corporation

From Form 4, 4/A and 5 filings with the SEC. A record of insider transactions, not a recommendation.