ON Semiconductor Corporation
CH ˙ SWX ˙ US6821891057
SecurityCH:ON / ON Semiconductor Corporation
InstitutionRafferty Asset Management, LLC
Latest Disclosed Ownership2,826,300 shares
Latest Disclosed Value $ 175,004,496
Rafferty Asset Management, LLC reports 22.24% decrease in ownership of ON / ON Semiconductor Corporation

On May 15, 2026 - Rafferty Asset Management, LLC filed a 13F-HR form disclosing ownership of 2,826,300 shares of ON Semiconductor Corporation (CH:ON) valued at $175,004,496 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 3,634,466 shares of ON Semiconductor Corporation. This represents a change in shares of -22.24% 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)
2026-05-15 2026-03-31 13F ON SEMICONDUCTOR COM 682189105 2,826,300 -808,166 -22.24 175,004 -11.08 0.7105
2026-02-13 2025-12-31 13F ON SEMICONDUCTOR COM 682189105 3,634,466 -181,288 -4.75 196,806 4.60 0.6799
2025-11-12 2025-09-30 13F ON SEMICONDUCTOR COM 682189105 3,815,754 -2,021,748 -34.63 188,155 -38.50 0.6103
2025-08-14 2025-06-30 13F ON SEMICONDUCTOR COM 682189105 5,837,502 2,072,125 55.03 305,943 99.68 1.0093
2025-05-14 2025-03-31 13F ON SEMICONDUCTOR COM 682189105 3,765,377 -216,115 -5.43 153,213 -38.97 0.6532
2025-02-14 2024-12-31 13F ON SEMICONDUCTOR COM 682189105 3,981,492 -86,322 -2.12 251,033 -15.01 0.8884
2024-11-13 2024-09-30 13F ON SEMICONDUCTOR COM 682189105 4,067,814 254,314 6.67 295,364 12.99 1.0119
2024-08-13 2024-06-30 13F ON SEMICONDUCTOR COM 682189105 3,813,500 -293,299 -7.14 261,415 -13.45 0.9704
2024-05-13 2024-03-31 13F ON SEMICONDUCTOR COM 682189105 4,106,799 1,117,245 37.37 302,055 20.96 1.1268
2024-02-13 2023-12-31 13F ON SEMICONDUCTOR COM 682189105 2,989,554 785,305 35.63 249,717 21.88 1.0530
2023-11-13 2023-09-30 13F ON SEMICONDUCTOR COM 682189105 2,204,249 -303,387 -12.10 204,885 -13.61 1.2042
2023-08-11 2023-06-30 13F ON SEMICONDUCTOR COM 682189105 2,507,636 463,619 22.68 237,172 40.95 1.3371
2023-05-11 2023-03-31 13F ON SEMICONDUCTOR COM 682189105 2,044,017 385,604 23.25 168,263 62.68 1.1402
2023-02-13 2022-12-31 13F ON SEMICONDUCTOR COM 682189105 1,658,413 80,830 5.12 103,435 5.19 0.8660
2022-11-14 2022-09-30 13F ON SEMICONDUCTOR COM 682189105 1,577,583 -43,982 -2.71 98,331 20.53 1.0466
2022-08-12 2022-06-30 13F ON SEMICONDUCTOR COM 682189105 1,621,565 -241,699 -12.97 81,581 -30.07 0.7507
2022-05-13 2022-03-31 13F ON SEMICONDUCTOR COM 682189105 1,863,264 380,037 25.62 116,659 15.80 0.6914
2022-02-10 2021-12-31 13F ON SEMICONDUCTOR COM 682189105 1,483,227 505,479 51.70 100,741 125.11 0.5302
2021-11-10 2021-09-30 13F ON SEMICONDUCTOR COM 682189105 977,748 -289,561 -22.85 44,752 -7.75 0.3058
2021-08-10 2021-06-30 13F ON SEMICONDUCTOR COM 682189105 1,267,309 158,181 14.26 48,513 5.12 0.3055
2021-05-10 2021-03-31 13F ON SEMICONDUCTOR COM 682189105 1,109,128 612,725 123.43 46,151 184.06 0.3153
2021-02-10 2020-12-31 13F ON SEMICONDUCTOR COM 682189105 496,403 -3,079 -0.62 16,247 49.96 0.1588
2020-11-13 2020-09-30 13F ON SEMICONDUCTOR COM 682189105 499,482 58,236 13.20 10,834 23.89 0.1310
2020-08-07 2020-06-30 13F ON SEMICONDUCTOR COM 682189105 441,246 300,724 214.00 8,745 400.29 0.1232
2020-05-15 2020-03-31 13F ON SEMICONDUCTOR COM 682189105 140,522 -88,346 -38.60 1,748 -68.67 0.0732
2020-02-10 2019-12-31 13F ON SEMICONDUCTOR COM 682189105 228,868 30,881 15.60 5,580 46.73 0.0858
2019-11-14 2019-09-30 13F ON SEMICONDUCTOR COM 682189105 197,987 -135,189 -40.58 3,803 -43.52 0.0595
2019-08-09 2019-06-30 13F ON SEMICONDUCTOR COM 682189105 333,176 17,312 5.48 6,733 3.63 0.1184
2019-05-15 2019-03-31 13F ON SEMICONDUCTOR COM 682189105 315,864 22,458 7.65 6,497 34.12 0.1045
2019-02-11 2018-12-31 13F ON SEMICONDUCTOR COM 682189105 293,406 -12,842 -4.19 4,844 -14.17 0.1057
2018-11-09 2018-09-30 13F ON SEMICONDUCTOR COM 682189105 306,248 -155,473 -33.67 5,644 -45.02 0.0875
2018-08-14 2018-06-30 13F ON SEMICONDUCTOR COM 682189105 461,721 -8,271 -1.76 10,266 -10.70 0.1534
2018-05-15 2018-03-31 13F ON SEMICONDUCTOR COM 682189105 469,992 93,137 24.71 11,496 45.68 0.1704
2018-02-14 2017-12-31 13F ON SEMICONDUCTOR COM 682189105 376,855 152,055 67.64 7,891 90.05 0.1363
2017-11-13 2017-09-30 13F ON SEMICONDUCTOR COM 682189105 224,800 26,117 13.15 4,152 48.82 0.0931
2017-08-11 2017-06-30 13F ON SEMICONDUCTOR COM 682189105 198,683 67,748 51.74 2,790 37.57 0.0801
2017-05-11 2017-03-31 13F ON SEMICONDUCTOR COM 682189105 130,935 118,549 957.12 2,028 1,183.54 0.0447
2017-02-13 2016-12-31 13F ON SEMICONDUCTOR COM 682189105 12,386 12,386 0.00 158 0.0072
2016-11-14 2016-09-30 13F ON SEMICONDUCTOR COM 682189105 0 -58,874 -100.00 0 -100.00
2016-08-09 2016-06-30 13F ON SEMICONDUCTOR COM 682189105 58,874 22,007 59.69 519 46.61 0.0351
2016-05-12 2016-03-31 13F ON SEMICONDUCTOR COM 682189105 36,867 36,867 0.00 354 0.0192
2016-02-12 2015-12-31 13F ON SEMICONDUCTOR COM 682189105 0 -41,076 -100.00 0 -100.00
2015-11-12 2015-09-30 13F ON SEMICONDUCTOR COM 682189105 41,076 41,076 0.00 386 0.0305
2015-08-12 2015-06-30 13F ON SEMICONDUCTOR COM 682189105 0 -48,834 -100.00 0 -100.00
2015-05-14 2015-03-31 13F ON SEMICONDUCTOR COM 682189105 48,834 3,044 6.65 591 27.37 0.0445
2015-02-13 2014-12-31 13F ON SEMICONDUCTOR COM 682189105 45,790 17,658 62.77 464 84.13 0.1053
2014-11-14 2014-09-30 13F ON SEMICONDUCTOR COM 682189105 28,132 -24,071 -46.11 252 -47.17 0.0271
2014-08-13 2014-06-30 13F ON SEMICONDUCTOR COM 682189105 52,203 32,292 162.18 477 155.08 0.0918
2014-05-14 2014-03-31 13F ON SEMICONDUCTOR COM 682189105 19,911 9,508 91.40 187 117.44 0.0387
2014-02-06 2013-12-31 13F ON SEMICONDUCTOR COM 682189105 10,403 10,403 86 0.0206
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.