ON Semiconductor Corporation
PE ˙ BVL ˙ US6821891057
SecurityPE:ONUS / ON Semiconductor Corporation
InstitutionWestpac Banking Corp
Latest Disclosed Ownership2,266 shares
Latest Disclosed Value $ 140,311
Westpac Banking Corp ownership in ONUS / ON Semiconductor Corporation

On May 11, 2026 - Westpac Banking Corp filed a 13F-HR form disclosing ownership of 2,266 shares of ON Semiconductor Corporation (PE:ONUS) valued at $140,311 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 2,266 shares of ON Semiconductor Corporation. This represents a change in shares of 0.00% during the quarter.

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.

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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)
2026-05-11 2026-03-31 13F ON SEMICONDUCTOR COM 682189105 2,266 0 0.00 140 14.75 0.0049
2026-02-10 2025-12-31 13F ON SEMICONDUCTOR COM 682189105 2,266 -978 -30.15 123 -23.27 0.0078
2025-11-14 2025-09-30 13F/A-1 ON SEMICONDUCTOR CORP USD 0.01 COM 682189105 3,244 0 0.00 160 -6.47 0.0099
2025-11-12 2025-09-30 13F ON SEMICONDUCTOR CORP USD 0.01 COM 682189105 3,244 0 160 0.0040
2025-08-11 2025-06-30 13F ON SEMICONDUCTOR COM 682189105 3,244 0 0.00 170 29.77 0.0114
2025-05-13 2025-03-31 13F ON SEMICONDUCTOR COM 682189105 3,244 0 0.00 132 -35.78 0.0097
2025-02-12 2024-12-31 13F ON SEMICONDUCTOR COM 682189105 3,244 -1,735 -34.85 205 -43.49 0.0136
2024-11-08 2024-09-30 13F ON SEMICONDUCTOR COM 682189105 4,979 1,735 53.48 362 62.61 0.0242
2024-08-14 2024-06-30 13F/A-1 ON SEMICONDUCTOR COM 682189105 3,244 -1,189 -26.82 222 -31.90 0.0176
2024-08-13 2024-06-30 13F ON SEMICONDUCTOR COM 682189105 69 -4,364 222 0.0076
2024-05-09 2024-03-31 13F ON SEMICONDUCTOR COM 682189105 4,433 2,640 147.24 326 118.79 0.0248
2024-02-08 2023-12-31 13F ON SEMICONDUCTOR COM 682189105 1,793 -248 -12.15 150 -21.16 0.0123
2023-11-13 2023-09-30 13F ON SEMICONDUCTOR COM 682189105 2,041 -510 -19.99 190 -21.58 0.0142
2023-08-10 2023-06-30 13F ON SEMICONDUCTOR COM 682189105 2,551 -52,314 -95.35 241 -94.66 0.0170
2023-05-04 2023-03-31 13F ON SEMICONDUCTOR COM 682189105 54,865 0 0.00 4,516 32.01 0.0607
2023-02-06 2022-12-31 13F ON SEMICONDUCTOR COM 682189105 54,865 3,701 7.23 3,422 7.28 0.0506
2022-11-08 2022-09-30 13F ON SEMICONDUCTOR COM 682189105 51,164 -4,871 -8.69 3,189 13.13 0.0486
2022-08-10 2022-06-30 13F ON SEMICONDUCTOR COM 682189105 56,035 10,019 21.77 2,819 -2.15 0.0367
2022-05-11 2022-03-31 13F ON SEMICONDUCTOR COM 682189105 46,016 18,090 64.78 2,881 51.95 0.0331
2022-02-08 2021-12-31 13F ON SEMICONDUCTOR COM 682189105 27,926 0 0.00 1,897 48.36 0.0196
2021-10-27 2021-09-30 13F ON SEMICONDUCTOR COM 682189105 27,926 0 0.00 1,278 19.55 0.0137
2021-08-11 2021-06-30 13F ON SEMICONDUCTOR COM 682189105 27,926 0 0.00 1,069 -8.00 0.0107
2021-05-13 2021-03-31 13F ON SEMICONDUCTOR COM 682189105 27,926 0 0.00 1,162 27.13 0.0128
2021-02-11 2020-12-31 13F ON SEMICONDUCTOR COM 682189105 27,926 0 0.00 914 51.07 0.0104
2020-11-10 2020-09-30 13F ON SEMICONDUCTOR COM 682189105 27,926 0 0.00 606 9.40 0.0082
2020-08-12 2020-06-30 13F ON SEMICONDUCTOR COM 682189105 27,926 0 0.00 553 59.37 0.0083
2020-05-14 2020-03-31 13F ON SEMICONDUCTOR COM 682189105 27,926 0 0.00 347 -48.97 0.0060
2020-02-11 2019-12-31 13F ON SEMICONDUCTOR COM 682189105 27,926 0 0.00 681 26.87 0.0088
2019-11-13 2019-09-30 13F ON SEMICONDUCTOR COM 682189105 27,926 0 0.00 536 -4.96 0.0075
2019-08-01 2019-06-30 13F ON SEMICONDUCTOR COM 682189105 27,926 0 0.00 564 -1.74 0.0086
2019-05-14 2019-03-31 13F ON SEMICONDUCTOR COM 682189105 27,926 0 0.00 574 24.51 0.0095
2019-02-07 2018-12-31 13F ON SEMICONDUCTOR COM 682189105 27,926 0 0.00 461 -10.31 0.0079
2018-11-13 2018-09-30 13F ON SEMICONDUCTOR COM 682189105 27,926 0 0.00 515 -17.10 0.0088
2018-07-18 2018-06-30 13F ON SEMICONDUCTOR COM 682189105 27,926 27,926 621 0.0119
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.