ON Semiconductor Corporation
CH ˙ SWX ˙ US6821891057
SecurityCH:ON / ON Semiconductor Corporation
InstitutionState Street Corp
Latest Disclosed Ownership19,393,304 shares
Ownership 4.60%
State Street Corp ownership in ON / ON Semiconductor Corporation

2025-08-11 - State Street Corp has filed an SCHEDULE 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 19,393,304 shares of ON Semiconductor Corporation (CH:ON). This represents 4.6 percent ownership of the company. In their previous filing dated 2025-05-13 , State Street Corp had reported owning 21,323,141 shares, indicating a decrease of -9.05 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2025-08-11 2025-08-11 13G 21,323,141 19,393,304 -9.05 4.60 -9.80
2025-05-13 2025-05-13 13G 21,323,141 5.10

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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)
2026-05-15 2026-03-31 13F ON SEMICONDUCTOR COM 682189105 18,307,578 -542,474 -2.88 1,133,605 11.06 0.0391
2026-02-13 2025-12-31 13F ON SEMICONDUCTOR COM 682189105 18,850,052 -310,343 -1.62 1,020,730 8.04 0.0342
2025-11-14 2025-09-30 13F ON SEMICONDUCTOR COM 682189105 19,160,395 -231,210 -1.19 944,799 -7.04 0.0328
2025-08-14 2025-06-30 13F ON SEMICONDUCTOR COM 682189105 19,391,605 -1,916,747 -9.00 1,016,314 17.22 0.0381
2025-05-15 2025-03-31 13F ON SEMICONDUCTOR COM 682189105 21,308,352 101,244 0.48 867,037 -35.16 0.0357
2025-02-14 2024-12-31 13F ON SEMICONDUCTOR COM 682189105 21,207,108 193,506 0.92 1,337,170 -12.36 0.0528
2024-11-14 2024-09-30 13F ON SEMICONDUCTOR COM 682189105 21,013,602 130,261 0.62 1,525,798 6.58 0.0621
2024-08-14 2024-06-30 13F ON SEMICONDUCTOR COM 682189105 20,883,341 316,921 1.54 1,431,553 -5.36 0.0626
2024-05-15 2024-03-31 13F ON SEMICONDUCTOR COM 682189105 20,566,420 1,080,622 5.55 1,512,660 -7.06 0.0676
2024-02-14 2023-12-31 13F ON SEMICONDUCTOR COM 682189105 19,485,798 1,571,428 8.77 1,627,649 -2.25 0.0792
2023-11-14 2023-09-30 13F ON SEMICONDUCTOR COM 682189105 17,914,370 -323,384 -1.77 1,665,141 -3.47 0.0923
2023-08-14 2023-06-30 13F ON SEMICONDUCTOR COM 682189105 18,237,754 292,768 1.63 1,724,927 16.77 0.0906
2023-05-15 2023-03-31 13F ON SEMICONDUCTOR COM 682189105 17,944,986 393,865 2.24 1,477,231 34.95 0.0834
2023-05-15 2022-12-31 13F/A-99 ON SEMICONDUCTOR COM 682189105 17,551,121 422,102 2.46 1,094,663 2.53 0.0643
2023-05-15 2022-12-31 13F ON SEMICONDUCTOR COM 682189105 17,551,121 422,102 1,094,663 0.0643
2022-11-15 2022-09-30 13F ON SEMICONDUCTOR COM 682189105 17,129,019 -154,664 -0.89 1,067,652 22.78 0.0675
2022-08-15 2022-06-30 13F ON SEMICONDUCTOR COM 682189105 17,283,683 6,603,825 61.83 869,542 30.04 0.0521
2022-05-16 2022-03-31 13F ON SEMICONDUCTOR COM 682189105 10,679,858 -105,329 -0.98 668,666 -8.72 0.0331
2022-02-14 2021-12-31 13F ON SEMICONDUCTOR COM 682189105 10,785,187 -157,202 -1.44 732,530 46.26 0.0347
2021-11-15 2021-09-30 13F ON SEMICONDUCTOR COM 682189105 10,942,389 397,118 3.77 500,833 24.07 0.0265
2021-08-16 2021-06-30 13F ON SEMICONDUCTOR COM 682189105 10,545,271 999,306 10.47 403,673 1.63 0.0213
2021-07-09 2021-03-31 13F/A-1 ON SEMICONDUCTOR COM 682189105 9,545,965 165,226 1.76 397,208 29.37 0.0228
2021-05-17 2021-03-31 13F ON SEMICONDUCTOR COM 682189105 9,545,965 165,226 397,208 0.0228
2021-02-16 2020-12-31 13F ON SEMICONDUCTOR COM 682189105 9,380,739 -16,349 -0.17 307,032 50.64 0.0188
2020-11-10 2020-09-30 13F ON SEMICONDUCTOR COM 682189105 9,397,088 -302,745 -3.12 203,823 6.02 0.0139
2020-08-14 2020-06-30 13F ON SEMICONDUCTOR COM 682189105 9,699,833 57,415 0.60 192,251 60.27 0.0140
2020-06-19 2020-03-31 13F/A-1 ON SEMICONDUCTOR COM 682189105 9,642,418 -663,255 -6.44 119,952 -52.26 0.0105
2020-05-11 2020-03-31 13F ON SEMICONDUCTOR COM 682189105 9,642,418 -663,255 119,952 10,534.2009
2020-02-06 2019-12-31 13F ON SEMICONDUCTOR COM 682189105 10,305,673 33,649 0.33 251,252 27.33 0.0172
2019-11-14 2019-09-30 13F ON SEMICONDUCTOR COM 682189105 10,272,024 -556,812 -5.14 197,326 -9.84 0.0147
2019-08-14 2019-06-30 13F ON SEMICONDUCTOR COM 682189105 10,828,836 499,849 4.84 218,851 3.00 0.0163
2019-05-15 2019-03-31 13F ON SEMICONDUCTOR COM 682189105 10,328,987 1,417,143 15.90 212,467 44.40 0.0166
2019-02-12 2018-12-31 13F ON SEMICONDUCTOR COM 682189105 8,911,844 118,549 1.35 147,135 -9.21 0.0134
2018-11-09 2018-09-30 13F ON SEMICONDUCTOR Common equity shares 682189105 8,793,295 980,248 12.55 162,056 -6.72 0.0124
2018-08-14 2018-06-30 13F ON SEMICONDUCTOR Common equity shares 682189105 7,813,047 2,166,469 38.37 173,722 25.78 0.0145
2018-05-15 2018-03-31 13F ON SEMICONDUCTOR Common equity shares 682189105 5,646,578 -278,145 -4.69 138,115 11.33 0.0117
2018-02-14 2017-12-31 13F ON SEMICONDUCTOR Common equity shares 682189105 5,924,723 25,592 0.43 124,061 13.86 0.0100
2017-11-14 2017-09-30 13F ON SEMICONDUCTOR Common equity shares 682189105 5,899,131 6,170 0.10 108,956 31.69 0.0094
2017-08-14 2017-06-30 13F ON SEMICONDUCTOR Common equity shares 682189105 5,892,961 -3,008 -0.05 82,735 -9.41 0.0073
2017-05-15 2017-03-31 13F ON SEMICONDUCTOR Common equity shares 682189105 5,895,969 266,071 4.73 91,330 27.14 0.0081
2017-02-09 2016-12-31 13F ON SEMICONDUCTOR Common equity shares 682189105 5,629,898 140,264 2.56 71,836 6.22 0.0068
2017-01-13 2016-09-30 13F/A-1 ON SEMICONDUCTOR Common equity shares 682189105 5,489,634 -365,758 -6.25 67,632 30.96 0.0068
2016-11-14 2016-09-30 13F ON SEMICONDUCTOR Common equity shares 682189105 5,489,634 67,632
2016-08-12 2016-06-30 13F ON SEMICONDUCTOR Common equity shares 682189105 5,855,392 -182,898 -3.03 51,645 -10.82 0.0055
2016-05-20 2016-03-31 13F/A-1 ON SEMICONDUCTOR Common equity shares 682189105 6,038,290 110,395 1.86 57,913 -0.31 0.0063
2016-05-12 2016-03-31 13F ON SEMICONDUCTOR Common equity shares 682189105 6,038,290 57,913
2016-02-16 2015-12-31 13F ON SEMICONDUCTOR Common equity shares 682189105 5,927,895 285,229 5.05 58,095 9.52 0.0063
2015-11-16 2015-09-30 13F ON SEMICONDUCTOR Common equity shares 682189105 5,642,666 -494,705 -8.06 53,044 -26.07 0.0062
2015-08-13 2015-06-30 13F ON SEMICONDUCTOR Common equity shares 682189105 6,137,371 -196,696 -3.11 71,747 -6.46 0.0077
2015-05-15 2015-03-31 13F ON SEMICONDUCTOR Common equity shares 682189105 6,334,067 -248,683 -3.78 76,703 15.03 0.0079
2015-02-11 2014-12-31 13F ON SEMICONDUCTOR Common equity shares 682189105 6,582,750 -142,465 -2.12 66,679 10.91 0.0066
2014-11-12 2014-09-30 13F/A-1 ON SEMICONDUCTOR Common equity shares 682189105 6,725,215 -75,939 -1.12 60,119 -3.29 0.0065
2014-11-10 2014-09-30 13F ON SEMICONDUCTOR Common equity shares 682189105 6,725,215 60,119
2014-08-12 2014-06-30 13F ON SEMICONDUCTOR Common equity shares 682189105 6,801,154 23,851 0.35 62,162 -2.43 0.0067
2014-05-15 2014-03-31 13F/A-1 ON SEMICONDUCTOR Common equity shares 682189105 6,777,303 901,131 15.34 63,708 31.57 0.0072
2014-05-13 2014-03-31 13F ON SEMICONDUCTOR Common equity shares 682189105 6,781,843 63,751
2014-02-06 2013-12-31 13F/A-1 ON SEMICONDUCTOR Common equity shares 682189105 5,876,172 78,133 1.35 48,421 14.40 0.0054
2014-02-06 2013-12-31 13F ON SEMICONDUCTOR Common equity shares 682189105 5,608,015 39,535
2013-11-12 2013-09-30 13F ON SEMICONDUCTOR Common equity shares 682189105 5,798,039 -63,694 -1.09 42,327 -10.63 0.0052
2013-08-08 2013-06-30 13F ON SEMICONDUCTOR Common equity shares 682189105 5,861,733 5,861,733 47,360 0.0062
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.