ON Semiconductor Corporation
US ˙ NasdaqGS ˙ US6821891057

SecurityON / ON Semiconductor Corporation
InstitutionSei Investments Co
Latest Disclosed Ownership1,858,652 shares
Latest Disclosed Value $ 100,645,403
Sei Investments Co reports 22.71% increase in ownership of ON / ON Semiconductor Corporation

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 1,858,652 shares of ON Semiconductor Corporation (US:ON) valued at $100,646,006 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 1,514,612 shares of ON Semiconductor Corporation. This represents a change in shares of 22.71% during the quarter. The current value of the position is $248,929,262 USD.

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)
2026-02-13 2025-12-31 13F ON SEMICONDUCTOR COM 682189105 1,858,652 344,040 22.71 100,645 34.76 0.0993
2025-11-13 2025-09-30 13F ON SEMICONDUCTOR COM 682189105 1,514,612 68,878 4.76 74,686 -1.43 0.0803
2025-08-14 2025-06-30 13F ON SEMICONDUCTOR COM 682189105 1,445,734 85,949 6.32 75,771 36.95 0.0878
2025-05-14 2025-03-31 13F/A-1 ON SEMICONDUCTOR COM 682189105 1,359,785 -880,721 -39.31 55,329 -60.83 0.0712
2025-05-13 2025-03-31 13F ON SEMICONDUCTOR COM 682189105 2,242,538 2,032 138,991 0.1512
2025-02-11 2024-12-31 13F ON SEMICONDUCTOR COM 682189105 2,240,506 147,583 7.05 141,264 -7.04 0.1814
2024-11-12 2024-09-30 13F ON SEMICONDUCTOR COM 682189105 2,092,923 -84,068 -3.86 151,967 1.83 0.1973
2024-08-13 2024-06-30 13F ON SEMICONDUCTOR COM 682189105 2,176,991 -148,374 -6.38 149,232 -12.75 0.2114
2024-05-07 2024-03-31 13F ON SEMICONDUCTOR COM 682189105 2,325,365 61,404 2.71 171,030 -9.56 0.2506
2024-02-14 2023-12-31 13F ON SEMICONDUCTOR COM 682189105 2,263,961 -437,613 -16.20 189,108 -24.69 0.3036
2023-11-14 2023-09-30 13F ON SEMICONDUCTOR COM 682189105 2,701,574 19,740 0.74 251,111 -1.00 0.4512
2023-08-11 2023-06-30 13F ON SEMICONDUCTOR COM 682189105 2,681,834 29,376 1.11 253,647 16.17 0.4424
2023-05-12 2023-03-31 13F ON SEMICONDUCTOR COM 682189105 2,652,458 -7,745 -0.29 218,350 31.60 0.4056
2023-02-10 2022-12-31 13F ON SEMICONDUCTOR COM 682189105 2,660,203 -452,639 -14.54 165,917 -14.49 0.3687
2022-11-14 2022-09-30 13F ON SEMICONDUCTOR COM 682189105 3,112,842 33,675 1.09 194,023 25.24 0.4328
2022-08-15 2022-06-30 13F ON SEMICONDUCTOR COM 682189105 3,079,167 632,840 25.87 154,918 1.14 0.3345
2022-05-13 2022-03-31 13F ON SEMICONDUCTOR COM 682189105 2,446,327 659,567 36.91 153,169 26.21 0.3079
2022-02-14 2021-12-31 13F ON SEMICONDUCTOR COM 682189105 1,786,760 645,414 56.55 121,361 132.29 0.2277
2021-11-12 2021-09-30 13F ON SEMICONDUCTOR COM 682189105 1,141,346 957,263 520.02 52,246 641.60 0.1096
2021-08-06 2021-06-30 13F ON SEMICONDUCTOR COM 682189105 184,083 -44,279 -19.39 7,045 -23.28 0.0156
2021-05-12 2021-03-31 13F ON SEMICONDUCTOR COM 682189105 228,362 -51,643 -18.44 9,183 -0.20 0.0231
2021-02-08 2020-12-31 13F ON SEMICONDUCTOR COM 682189105 280,005 -30,805 -9.91 9,201 36.09 0.0238
2020-12-04 2020-09-30 13F/A-1 ON SEMICONDUCTOR COM 682189105 310,810 -263,074 -45.84 6,761 -40.71 0.0196
2020-11-06 2020-09-30 13F ON SEMICONDUCTOR COM 682189105 326,761 -247,123 7,107 17,112.0758
2020-08-17 2020-06-30 13F/A-1 ON SEMICONDUCTOR COM 682189105 573,884 10,570 1.88 11,403 64.40 0.0354
2020-08-11 2020-06-30 13F ON SEMICONDUCTOR COM 682189105 304,045 -259,269 7,220 19,584.6343
2020-05-14 2020-03-31 13F ON SEMICONDUCTOR COM 682189105 563,314 259,013 85.12 6,936 -7.16 0.0255
2020-02-06 2019-12-31 13F ON SEMICONDUCTOR COM 682189105 304,301 28,201 10.21 7,471 39.80 0.0223
2019-11-12 2019-09-30 13F ON SEMICONDUCTOR COM 682189105 276,100 57,578 26.35 5,344 20.06 0.0137
2019-08-14 2019-06-30 13F ON SEMICONDUCTOR COM 682189105 218,522 22,128 11.27 4,451 9.36 0.0145
2019-05-15 2019-03-31 13F ON SEMICONDUCTOR COM 682189105 196,394 -29,891 -13.21 4,070 6.24 0.0137
2019-02-13 2018-12-31 13F ON SEMICONDUCTOR COM 682189105 226,285 151,344 201.95 3,831 174.43 0.0136
2018-11-08 2018-09-30 13F ON SEMICONDUCTOR COM 682189105 74,941 -69,113 -47.98 1,396 -56.40 0.0051
2018-08-03 2018-06-30 13F ON SEMICONDUCTOR COM 682189105 144,054 -56,727 -28.25 3,202 -34.80 0.0109
2018-05-11 2018-03-31 13F ON SEMICONDUCTOR COM 682189105 200,781 -24,805 -11.00 4,911 3.96 0.0188
2018-02-08 2017-12-31 13F ON SEMICONDUCTOR COM 682189105 225,586 7,575 3.47 4,724 17.34 0.0164
2017-11-06 2017-09-30 13F ON SEMICONDUCTOR COM 682189105 218,011 -216,355 -49.81 4,026 -33.98 0.0143
2017-07-31 2017-06-30 13F ON SEMICONDUCTOR COM 682189105 434,366 117,594 37.12 6,098 24.27 0.0243
2017-05-05 2017-03-31 13F ON SEMICONDUCTOR COM 682189105 316,772 -283,151 -47.20 4,907 -35.89 0.0215
2017-02-02 2016-12-31 13F ON SEMICONDUCTOR COM 682189105 599,923 112,742 23.14 7,654 27.52 0.0371
2016-11-04 2016-09-30 13F ON SEMICONDUCTOR COM 682189105 487,181 314,709 182.47 6,002 294.61 0.0305
2016-08-11 2016-06-30 13F ON SEMICONDUCTOR COM 682189105 172,472 35,563 25.98 1,521 15.84 0.0091
2016-05-10 2016-03-31 13F/A-1 ON SEMICONDUCTOR COM 682189105 136,909 -629,452 -82.14 1,313 -82.52 0.0082
2016-02-03 2015-12-31 13F ON SEMICONDUCTOR COM 682189105 766,361 173,303 29.22 7,510 34.71 0.0458
2015-11-02 2015-09-30 13F/A-1 ON SEMICONDUCTOR COM 682189105 593,058 -76,006 -11.36 5,575 -28.72 0.0512
2015-10-30 2015-09-30 13F ON SEMICONDUCTOR COM 682189105 593,058 5,576
2015-08-07 2015-06-30 13F/A-1 ON SEMICONDUCTOR COM 682189105 669,064 15,702 2.40 7,821 -1.14 0.0707
2015-08-04 2015-06-30 13F ON SEMICONDUCTOR COM 682189105 669,064 15,702 7,821 0.0707
2015-05-14 2015-03-31 13F/A-1 ON SEMICONDUCTOR COM 682189105 653,362 209,318 47.14 7,911 75.84 0.0687
2015-05-01 2015-03-31 13F OMNIAMERICAN BANCORP COM 682189105 653,362 7,911
2015-02-10 2014-12-31 13F ON SEMICONDUCTOR COM 682189105 444,044 444,044 4,499 0.0398
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.