ON Semiconductor Corporation
CH ˙ SWX ˙ US6821891057
SecurityCH:ON / ON Semiconductor Corporation
InstitutionRhumbline Advisers
Latest Disclosed Ownership786,226 shares
Latest Disclosed Value $ 48,683,007
Rhumbline Advisers reports 5.13% decrease in ownership of ON / ON Semiconductor Corporation

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 786,226 shares of ON Semiconductor Corporation (CH:ON) valued at $48,683,007 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 828,729 shares of ON Semiconductor Corporation. This represents a change in shares of -5.13% 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)
2026-05-12 2026-03-31 13F ON SEMICONDUCTOR COM 682189105 786,226 -42,503 -5.13 48,683 8.49 0.0416
2026-02-13 2025-12-31 13F ON SEMICONDUCTOR COM 682189105 828,729 -42,683 -4.90 44,876 4.44 0.0363
2025-11-06 2025-09-30 13F ON SEMICONDUCTOR COM 682189105 871,412 22,036 2.59 42,969 -3.47 0.0345
2025-08-12 2025-06-30 13F ON SEMICONDUCTOR COM 682189105 849,376 12,581 1.50 44,516 30.74 0.0381
2025-05-29 2025-03-31 13F/A-1 ON SEMICONDUCTOR COM 682189105 836,795 38,376 4.81 34,049 -32.36 0.0318
2025-04-08 2025-03-31 13F ON SEMICONDUCTOR COM 682189105 836,795 38,376 34,049 0.0318
2025-05-29 2024-12-31 13F/A-1 ON SEMICONDUCTOR COM 682189105 798,419 -27,096 -3.28 50,340 -16.02 0.0450
2025-01-30 2024-12-31 13F ON SEMICONDUCTOR COM 682189105 798,419 -27,096 50,340 0.0450
2024-11-12 2024-09-30 13F ON SEMICONDUCTOR COM 682189105 825,515 -23,018 -2.71 59,941 3.05 0.0541
2024-08-01 2024-06-30 13F ON SEMICONDUCTOR COM 682189105 848,533 2,475 0.29 58,167 -6.53 0.0547
2024-05-09 2024-03-31 13F ON SEMICONDUCTOR COM 682189105 846,058 -10,576 -1.23 62,227 -13.03 0.0598
2024-02-08 2023-12-31 13F ON SEMICONDUCTOR COM 682189105 856,634 17,773 2.12 71,555 -8.23 0.0750
2023-11-09 2023-09-30 13F ON SEMICONDUCTOR COM 682189105 838,861 1,586 0.19 77,972 -1.54 0.0905
2023-08-08 2023-06-30 13F ON SEMICONDUCTOR COM 682189105 837,275 -33,250 -3.82 79,189 111,433.80 0.0887
2023-05-11 2023-03-31 13F ON SEMICONDUCTOR COM 682189105 870,525 45,926 5.57 72 -99.86 0.0884
2023-02-14 2022-12-31 13F ON SEMICONDUCTOR COM 682189105 824,599 31,878 4.02 51,430 4.09 0.0691
2022-11-10 2022-09-30 13F ON SEMICONDUCTOR COM 682189105 792,721 18,133 2.34 49,410 26.79 0.0736
2022-08-11 2022-06-30 13F ON SEMICONDUCTOR COM 682189105 774,588 365,714 89.44 38,970 52.23 0.0569
2022-05-12 2022-03-31 13F ON SEMICONDUCTOR COM 682189105 408,874 -27,410 -6.28 25,600 -13.61 0.0330
2022-02-10 2021-12-31 13F ON SEMICONDUCTOR COM 682189105 436,284 13,892 3.29 29,632 53.27 0.0363
2021-11-12 2021-09-30 13F ON SEMICONDUCTOR COM 682189105 422,392 -17,027 -3.87 19,333 14.93 0.0262
2021-08-05 2021-06-30 13F ON SEMICONDUCTOR COM 682189105 439,419 -19,531 -4.26 16,821 -11.92 0.0221
2021-05-06 2021-03-31 13F ON SEMICONDUCTOR COM 682189105 458,950 -17,638 -3.70 19,097 22.42 0.0259
2021-02-10 2020-12-31 13F ON SEMICONDUCTOR COM 682189105 476,588 16,389 3.56 15,599 56.27 0.0215
2020-11-12 2020-09-30 13F ON SEMICONDUCTOR COM 682189105 460,199 -11,703 -2.48 9,982 6.73 0.0156
2020-08-13 2020-06-30 13F ON SEMICONDUCTOR COM 682189105 471,902 2,347 0.50 9,353 60.13 0.0156
2020-05-06 2020-03-31 13F ON SEMICONDUCTOR COM 682189105 469,555 105,023 28.81 5,841 -34.27 0.0122
2020-02-05 2019-12-31 13F ON SEMICONDUCTOR COM 682189105 364,532 4,336 1.20 8,887 28.44 0.0149
2019-10-23 2019-09-30 13F ON SEMICONDUCTOR COM 682189105 360,196 2,739 0.77 6,919 -4.22 0.0126
2019-08-14 2019-06-30 13F ON SEMICONDUCTOR COM 682189105 357,457 -87,325 -19.63 7,224 -21.04 0.0136
2019-05-01 2019-03-31 13F ON SEMICONDUCTOR COM 682189105 444,782 -2,171 -0.49 9,149 23.99 0.0177
2019-01-31 2018-12-31 13F ON SEMICONDUCTOR COM 682189105 446,953 -24,961 -5.29 7,379 -15.15 0.0161
2018-11-07 2018-09-30 13F ON SEMICONDUCTOR COM 682189105 471,914 -10,518 -2.18 8,697 -18.92 0.0168
2018-08-06 2018-06-30 13F ON SEMICONDUCTOR COM 682189105 482,432 15,586 3.34 10,727 -6.06 0.0216
2018-05-02 2018-03-31 13F ON SEMICONDUCTOR COM 682189105 466,846 -10,241 -2.15 11,419 14.30 0.0238
2018-02-09 2017-12-31 13F ON SEMICONDUCTOR COM 682189105 477,087 -7,905 -1.63 9,990 11.52 0.0203
2017-11-06 2017-09-30 13F ON SEMICONDUCTOR COM 682189105 484,992 -19,513 -3.87 8,958 26.47 0.0195
2017-08-02 2017-06-30 13F ON SEMICONDUCTOR COM 682189105 504,505 42,810 9.27 7,083 -0.96 0.0162
2017-05-02 2017-03-31 13F ON SEMICONDUCTOR COM 682189105 461,695 25,413 5.82 7,152 28.47 0.0167
2017-01-27 2016-12-31 13F ON SEMICONDUCTOR COM 682189105 436,282 29,799 7.33 5,567 11.16 0.0141
2016-11-08 2016-09-30 13F ON SEMICONDUCTOR COM 682189105 406,483 19,726 5.10 5,008 46.82 0.0138
2016-08-11 2016-06-30 13F ON SEMICONDUCTOR COM 682189105 386,757 -45,194 -10.46 3,411 -17.65 0.0101
2016-05-02 2016-03-31 13F ON SEMICONDUCTOR CORPORATION C COM 682189105 431,951 -6,560 -1.50 4,142 -3.61 0.0129
2016-02-03 2015-12-31 13F ON SEMICONDUCTOR CORPORATION C COM 682189105 438,511 1,770 0.41 4,297 4.68 0.0138
2015-11-04 2015-09-30 13F ON SEMICONDUCTOR CORPORATION C COM 682189105 436,741 15,515 3.68 4,105 -16.63 0.0140
2015-08-04 2015-06-30 13F ON SEMICONDUCTOR CORPORATION C COM 682189105 421,226 79,016 23.09 4,924 18.82 0.0157
2015-05-12 2015-03-31 13F ON SEMICONDUCTOR CORPORATION C COM 682189105 342,210 6,665 1.99 4,144 21.92 0.0120
2015-02-06 2014-12-31 13F ON SEMICONDUCTOR CORPORATION C COM 682189105 335,545 -65 -0.02 3,399 13.30 0.0099
2014-11-12 2014-09-30 13F ON SEMICONDUCTOR CORPORATION C COM 682189105 335,610 -203 -0.06 3,000 -2.25 0.0090
2014-08-06 2014-06-30 13F ON SEMICONDUCTOR CORPORATION C COM 682189105 335,813 -38,421 -10.27 3,069 -12.76 0.0090
2014-05-06 2014-03-31 13F ON SEMICONDUCTOR CORPORATION C COM 682189105 374,234 -16,690 -4.27 3,518 9.22 0.0104
2014-02-03 2013-12-31 13F ON SEMICONDUCTOR CORPORATION C COM 682189105 390,924 -42,008 -9.70 3,221 1.93 0.0095
2013-11-05 2013-09-30 13F ON SEMICONDUCTOR CORPORATION C COM 682189105 432,932 -8,647 -1.96 3,160 -11.43 0.0098
2013-08-07 2013-06-30 13F ON SEMICONDUCTOR CORPORATION C COM 682189105 441,579 441,579 3,568 0.0115
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.