Arrowhead Pharmaceuticals, Inc.
US ˙ NasdaqGS ˙ US04280A1007

SecurityARWR / Arrowhead Pharmaceuticals, Inc.
InstitutionCreative Planning
Latest Disclosed Ownership88,256 shares
Latest Disclosed Value $ 5,533,651
Creative Planning reports 18.59% increase in ownership of ARWR / Arrowhead Pharmaceuticals, Inc.

On May 12, 2026 - Creative Planning filed a 13F-HR form disclosing ownership of 88,256 shares of Arrowhead Pharmaceuticals, Inc. (US:ARWR) valued at $5,533,651 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 74,421 shares of Arrowhead Pharmaceuticals, Inc.. This represents a change in shares of 18.59% during the quarter. The current value of the position is $6,402,973 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-12 2026-03-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 88,256 13,835 18.59 5,534 12.00 0.0038
2026-02-17 2025-12-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 74,421 22,415 43.10 4,941 175.52 0.0035
2025-11-14 2025-09-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 52,006 6,344 13.89 1,794 148.68 0.0014
2025-08-08 2025-06-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 45,662 19,194 72.52 721 113.95 0.0006
2025-05-15 2025-03-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 26,468 -29,161 -52.42 337 -67.75 0.0003
2025-02-14 2024-12-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 55,629 30,220 118.93 1,046 112.40 0.0010
2024-10-11 2024-09-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 25,409 -2,867 -10.14 492 -32.97 0.0005
2024-08-15 2024-06-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 28,276 2,420 9.36 735 -0.68 0.0008
2024-05-13 2024-03-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 25,856 7,455 40.51 739 31.26 0.0008
2024-02-14 2023-12-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 18,401 1,263 7.37 563 22.39 0.0010
2023-11-16 2023-09-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 17,138 -949 -5.25 460 -28.57 0.0006
2023-07-21 2023-06-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 18,087 3,712 25.82 645 76.44 0.0009
2023-05-15 2023-03-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 14,375 -979 -6.38 365 -41.32 0.0005
2023-02-10 2022-12-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 15,354 761 5.21 623 29.05 0.0009
2022-11-03 2022-09-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 14,593 750 5.42 482 -1.03 0.0008
2022-08-15 2022-06-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 13,843 1,207 9.55 487 -16.18 0.0008
2022-05-16 2022-03-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 12,636 58 0.46 581 -30.34 0.0009
2022-02-11 2021-12-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 12,578 -745 -5.59 834 0.24 0.0013
2021-11-10 2021-09-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 13,323 750 5.97 832 -20.08 0.0015
2021-08-04 2021-06-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 12,573 3,272 35.18 1,041 68.72 0.0018
2021-04-30 2021-03-31 13F CreativePlanning COM 04280A100 9,301 632 7.29 617 -7.22 0.0012
2021-01-29 2020-12-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 8,669 316 3.78 665 84.72 0.0015
2020-11-05 2020-09-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 8,353 0 0.00 360 -0.28 0.0009
2020-07-23 2020-06-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 8,353 -2,318 -21.72 361 17.59 0.0010
2020-05-05 2020-03-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 10,671 -1,905 -15.15 307 -61.53 0.0011
2020-01-30 2019-12-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 12,576 -461 -3.54 798 117.44 0.0024
2019-11-01 2019-09-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 13,037 -465 -3.44 367 2.51 0.0012
2019-07-26 2019-06-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 13,502 2,735 25.40 358 80.81 0.0012
2019-04-24 2019-03-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 10,767 -10,160 -48.55 198 -23.85 0.0007
2019-02-12 2018-12-31 13F/A-1 ARROWHEAD PHARMACEUTICALS IN COM 04280A100 20,927 20,927 260 0.0011
2019-02-01 2018-12-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 20,927 20,927 260
2017-10-17 2017-09-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 0 -4,402 -100.00 0 -100.00
2017-07-12 2017-06-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 4,402 2,000 83.26 7 75.00 0.0000
2017-04-07 2017-03-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 2,402 -4,000 -62.48 4 -60.00 0.0000
2017-01-09 2016-12-31 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 6,402 -100 -1.54 10 -79.17 0.0001
2016-10-12 2016-09-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 6,502 4,000 159.87 48 269.23 0.0003
2016-07-12 2016-06-30 13F ARROWHEAD PHARMACEUTICALS IN COM 04280A100 2,502 2,502 13 0.0001
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.