ON Semiconductor Corporation
CH ˙ SWX ˙ US6821891057
SecurityCH:ON / ON Semiconductor Corporation
InstitutionTcw Group Inc
Latest Disclosed Ownership88,914 shares
Latest Disclosed Value $ 5,505,555
Tcw Group Inc reports 36.30% decrease in ownership of ON / ON Semiconductor Corporation

On May 14, 2026 - Tcw Group Inc filed a 13F-HR form disclosing ownership of 88,914 shares of ON Semiconductor Corporation (CH:ON) valued at $5,505,555 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 139,590 shares of ON Semiconductor Corporation. This represents a change in shares of -36.30% 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)
2026-05-14 2026-03-31 13F ON SEMICONDUCTOR COM 682189105 88,914 -50,676 -36.30 5,506 -27.16 0.0220
2026-02-17 2025-12-31 13F ON SEMICONDUCTOR COM 682189105 139,590 120,527 632.26 7,559 704.90 0.0541
2025-11-14 2025-09-30 13F ON SEMICONDUCTOR COM 682189105 19,063 -6,889 -26.55 940 -30.96 0.0079
2025-08-14 2025-06-30 13F ON SEMICONDUCTOR COM 682189105 25,952 -269,721 -91.22 1,360 -88.69 0.0107
2025-05-07 2025-03-31 13F ON SEMICONDUCTOR COM 682189105 295,673 5,277 1.82 12,031 -34.29 0.1077
2025-02-04 2024-12-31 13F ON SEMICONDUCTOR COM 682189105 290,396 2,354 0.82 18,309 -12.46 0.1537
2024-11-19 2024-09-30 13F/A-1 ON SEMICONDUCTOR COM 682189105 288,042 -45,540 -13.65 20,915 -8.54 0.1829
2024-11-08 2024-09-30 13F ON SEMICONDUCTOR COM 682189105 288,042 -45,540 20,915 0.0940
2024-07-19 2024-06-30 13F ON SEMICONDUCTOR COM 682189105 333,582 -184,790 -35.65 22,867 -40.02 0.2044
2024-05-10 2024-03-31 13F ON SEMICONDUCTOR COM 682189105 518,372 -49,224 -8.67 38,126 -19.60 0.3860
2024-02-09 2023-12-31 13F ON SEMICONDUCTOR COM 682189105 567,596 -14,754 -2.53 47,421 -12.39 0.5284
2023-11-15 2023-09-30 13F ON SEMICONDUCTOR COM 682189105 582,350 -194,645 -25.05 54,129 -26.34 0.6800
2023-08-14 2023-06-30 13F ON SEMICONDUCTOR COM 682189105 776,995 18,496 2.44 73,488 17.70 0.8149
2023-05-15 2023-03-31 13F ON SEMICONDUCTOR COM 682189105 758,499 51,850 7.34 62,440 41.67 0.7987
2023-02-14 2022-12-31 13F ON SEMICONDUCTOR COM 682189105 706,649 -65,703 -8.51 44,074 -8.45 0.6310
2022-10-27 2022-09-30 13F ON SEMICONDUCTOR COM 682189105 772,352 -164,392 -17.55 48,140 2.15 0.7042
2022-07-19 2022-06-30 13F ON SEMICONDUCTOR COM 682189105 936,744 -239,792 -20.38 47,128 -36.02 0.6170
2022-04-19 2022-03-31 13F ON SEMICONDUCTOR COM 682189105 1,176,536 -169,361 -12.58 73,662 -19.42 0.7029
2022-01-26 2021-12-31 13F ON SEMICONDUCTOR COM 682189105 1,345,897 100,076 8.03 91,414 60.32 0.7517
2021-10-26 2021-09-30 13F ON SEMICONDUCTOR COM 682189105 1,245,821 -112,276 -8.27 57,021 9.68 0.1468
2021-07-23 2021-06-30 13F ON SEMICONDUCTOR COM 682189105 1,358,097 4,159 0.31 51,987 -7.72 0.4505
2021-05-05 2021-03-31 13F ON SEMICONDUCTOR COM 682189105 1,353,938 -262,163 -16.22 56,337 6.51 0.5398
2021-02-02 2020-12-31 13F ON SEMICONDUCTOR COM 682189105 1,616,101 -252,075 -13.49 52,895 30.54 0.4605
2020-10-30 2020-09-30 13F ON SEMICONDUCTOR COM 682189105 1,868,176 367,221 24.47 40,521 36.21 0.4419
2020-08-05 2020-06-30 13F ON SEMICONDUCTOR COM 682189105 1,500,955 -2,253 -0.15 29,749 59.09 0.3470
2020-05-05 2020-03-31 13F ON SEMICONDUCTOR COM 682189105 1,503,208 836,281 125.39 18,700 15.01 0.2586
2020-02-10 2019-12-31 13F ON SEMICONDUCTOR COM 682189105 666,927 666,927 16,260 0.1801
2019-02-11 2018-12-31 13F ON SEMICONDUCTOR COM 682189105 0 -3,081,724 -100.00 0 -100.00
2018-10-30 2018-09-30 13F ON SEMICONDUCTOR COM 682189105 3,081,724 -2,027,430 -39.68 56,796 -50.00 0.4657
2018-08-01 2018-06-30 13F ON SEMICONDUCTOR COM 682189105 5,109,154 142,020 2.86 113,602 -6.50 0.9214
2018-05-10 2018-03-31 13F ON SEMICONDUCTOR COM 682189105 4,967,134 231,181 4.88 121,496 22.51 0.9882
2018-02-09 2017-12-31 13F ON SEMICONDUCTOR COM 682189105 4,735,953 -321,146 -6.35 99,171 6.17 0.7986
2017-11-06 2017-09-30 13F ON SEMICONDUCTOR COM 682189105 5,057,099 938,018 22.77 93,405 61.51 0.7424
2017-08-11 2017-06-30 13F ON SEMICONDUCTOR COM 682189105 4,119,081 1,058,392 34.58 57,832 21.98 0.4802
2017-05-11 2017-03-31 13F ON SEMICONDUCTOR COM 682189105 3,060,689 1,884,112 160.14 47,410 215.79 0.3955
2017-02-10 2016-12-31 13F ON SEMICONDUCTOR COM 682189105 1,176,577 1,102,877 1,496.44 15,013 1,553.41 0.1130
2016-11-14 2016-09-30 13F ON SEMICONDUCTOR COM 682189105 73,700 -17,000 -18.74 908 13.50 0.0069
2016-08-12 2016-06-30 13F/A-1 ON SEMICONDUCTOR COM 682189105 90,700 0 0.00 800 -8.05 0.0060
2016-08-11 2016-06-30 13F ON SEMICONDUCTOR COM 682189105 90,700 800
2016-05-16 2016-03-31 13F ON SEMICONDUCTOR COM 682189105 90,700 0 0.00 870 -2.14 0.0064
2016-02-16 2015-12-31 13F ON SEMICONDUCTOR COM 682189105 90,700 -7,400 -7.54 889 -3.58 0.0064
2015-11-13 2015-09-30 13F ON SEMICONDUCTOR COM 682189105 98,100 98,100 922 0.0066
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.