ON Semiconductor Corporation
CH ˙ SWX ˙ US6821891057
SecurityCH:ON / ON Semiconductor Corporation
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership2,165,193 shares
Latest Disclosed Value $ 117,245,201
Alliancebernstein L.p. reports 11.24% decrease in ownership of ON / ON Semiconductor Corporation

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 2,165,193 shares of ON Semiconductor Corporation (CH:ON) valued at $117,245,201 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 2,439,449 shares of ON Semiconductor Corporation. This represents a change in shares of -11.24% 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.

Upgrade to unlock premium data and export to Excel .

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 2,165,193 -274,256 -11.24 117,245 -11.24 0.0380
2026-02-17 2025-12-31 13F ON SEMICONDUCTOR COM 682189105 2,439,449 554,154 29.39 132,096 42.10 0.0417
2025-11-14 2025-09-30 13F ON SEMICONDUCTOR COM 682189105 1,885,295 -125,782 -6.25 92,964 -11.80 0.0293
2025-08-14 2025-06-30 13F ON SEMICONDUCTOR COM 682189105 2,011,077 1,523,866 312.77 105,401 431.68 0.0344
2025-05-15 2025-03-31 13F ON SEMICONDUCTOR COM 682189105 487,211 -228,842 -31.96 19,825 -56.09 0.0072
2025-02-12 2024-12-31 13F ON SEMICONDUCTOR COM 682189105 716,053 -344,611 -32.49 45,147 -41.38 0.0153
2024-11-14 2024-09-30 13F ON SEMICONDUCTOR COM 682189105 1,060,664 186,516 21.34 77,015 28.52 0.0259
2024-08-14 2024-06-30 13F ON SEMICONDUCTOR COM 682189105 874,148 -2,362,296 -72.99 59,923 -74.83 0.0209
2024-05-14 2024-03-31 13F ON SEMICONDUCTOR COM 682189105 3,236,444 261,991 8.81 238,040 -4.19 0.0842
2024-02-14 2023-12-31 13F ON SEMICONDUCTOR COM 682189105 2,974,453 16,408 0.55 248,456 -9.64 0.0956
2023-11-14 2023-09-30 13F ON SEMICONDUCTOR COM 682189105 2,958,045 -851,000 -22.34 274,950 -23.68 0.1170
2023-08-15 2023-06-30 13F ON SEMICONDUCTOR COM 682189105 3,809,045 -583,654 -13.29 360,259 -0.37 0.1470
2023-05-15 2023-03-31 13F ON SEMICONDUCTOR COM 682189105 4,392,699 -746,399 -14.52 361,607 12.82 0.1549
2023-02-15 2022-12-31 13F ON SEMICONDUCTOR COM 682189105 5,139,098 2,743,216 114.50 320,526 114.63 0.1443
2022-11-15 2022-09-30 13F ON SEMICONDUCTOR COM 682189105 2,395,882 -627,894 -20.77 149,335 -1.83 0.0723
2022-08-15 2022-06-30 13F ON SEMICONDUCTOR COM 682189105 3,023,776 -989,972 -24.66 152,126 -39.46 0.0695
2022-05-13 2022-03-31 13F ON SEMICONDUCTOR COM 682189105 4,013,748 -1,291,355 -24.34 251,301 -30.26 0.0970
2022-02-14 2021-12-31 13F ON SEMICONDUCTOR COM 682189105 5,305,103 -1,307,794 -19.78 360,323 19.05 0.1274
2021-11-10 2021-09-30 13F ON SEMICONDUCTOR COM 682189105 6,612,897 4,032,943 156.32 302,672 206.47 0.1194
2021-07-30 2021-06-30 13F ON SEMICONDUCTOR COM 682189105 2,579,954 -604,317 -18.98 98,761 -25.46 0.0396
2021-05-06 2021-03-31 13F ON SEMICONDUCTOR COM 682189105 3,184,271 -139,257 -4.19 132,498 21.80 0.0581
2021-02-08 2020-12-31 13F ON SEMICONDUCTOR COM 682189105 3,323,528 2,680,010 416.46 108,779 679.33 0.0513
2020-11-12 2020-09-30 13F ON SEMICONDUCTOR COM 682189105 643,518 368,978 134.40 13,958 156.53 0.0075
2020-08-13 2020-06-30 13F ON SEMICONDUCTOR COM 682189105 274,540 3,133 1.15 5,441 61.17 0.0032
2020-05-14 2020-03-31 13F ON SEMICONDUCTOR COM 682189105 271,407 -2,442,441 -90.00 3,376 -94.90 0.0024
2020-02-18 2019-12-31 13F ON SEMICONDUCTOR COM 682189105 2,713,848 -437,254 -13.88 66,164 9.30 0.0376
2019-11-14 2019-09-30 13F ON SEMICONDUCTOR COM 682189105 3,151,102 2,899,470 1,152.27 60,533 1,090.42 0.0377
2019-08-14 2019-06-30 13F ON SEMICONDUCTOR COM 682189105 251,632 -11,745 -4.46 5,085 -6.15 0.0032
2019-05-14 2019-03-31 13F ON SEMICONDUCTOR COM 682189105 263,377 -2,829 -1.06 5,418 23.28 0.0035
2019-02-13 2018-12-31 13F ON SEMICONDUCTOR COM 682189105 266,206 7,933 3.07 4,395 -7.67 0.0033
2018-11-08 2018-09-30 13F ON SEMICONDUCTOR COM 682189105 258,273 -206,142 -44.39 4,760 -53.90 0.0031
2018-08-13 2018-06-30 13F ON SEMICONDUCTOR COM 682189105 464,415 222,896 92.29 10,326 74.78 0.0072
2018-05-14 2018-03-31 13F ON SEMICONDUCTOR COM 682189105 241,519 -2,530 -1.04 5,908 15.62 0.0043
2018-02-13 2017-12-31 13F ON SEMICONDUCTOR COM 682189105 244,049 -24,350 -9.07 5,110 3.09 0.0037
2017-11-13 2017-09-30 13F ON SEMICONDUCTOR COM 682189105 268,399 -1,942,738 -87.86 4,957 -84.03 0.0037
2017-08-10 2017-06-30 13F ON SEMICONDUCTOR COM 682189105 2,211,137 -1,025,008 -31.67 31,044 -38.07 0.0240
2017-05-11 2017-03-31 13F ON SEMICONDUCTOR COM 682189105 3,236,145 -2,854,778 -46.87 50,128 -35.50 0.0399
2017-02-13 2016-12-31 13F ON SEMICONDUCTOR COM 682189105 6,090,923 -173,476 -2.77 77,720 0.70 0.0648
2016-11-10 2016-09-30 13F ON SEMICONDUCTOR COM 682189105 6,264,399 341,584 5.77 77,177 47.74 0.0651
2016-08-11 2016-06-30 13F ON SEMICONDUCTOR COM 682189105 5,922,815 -558,086 -8.61 52,239 -15.95 0.0450
2016-05-13 2016-03-31 13F ON SEMICONDUCTOR COM 682189105 6,480,901 -1,147,995 -15.05 62,152 -16.87 0.0528
2016-02-16 2015-12-31 13F/A-1 ON SEMICONDUCTOR COM 682189105 7,628,896 410,875 5.69 74,763 10.19 0.0636
2016-02-12 2015-12-31 13F ON SEMICONDUCTOR COM 682189105 7,628,896 71,712
2015-11-13 2015-09-30 13F ON SEMICONDUCTOR COM 682189105 7,218,021 343,914 5.00 67,849 -15.57 0.0582
2015-08-14 2015-06-30 13F ON SEMICONDUCTOR COM 682189105 6,874,107 833,949 13.81 80,358 9.86 0.0664
2015-05-13 2015-03-31 13F ON SEMICONDUCTOR COM 682189105 6,040,158 968,623 19.10 73,146 42.38 0.0593
2015-02-13 2014-12-31 13F ON SEMICONDUCTOR COM 682189105 5,071,535 -634,471 -11.12 51,375 0.71 0.0427
2014-11-13 2014-09-30 13F ON SEMICONDUCTOR COM 682189105 5,706,006 5,316,272 1,364.08 51,012 1,332.12 0.0430
2014-08-13 2014-06-30 13F ON SEMICONDUCTOR COM 682189105 389,734 -384,600 -49.67 3,562 -51.06 0.0030
2014-05-13 2014-03-31 13F ON SEMICONDUCTOR COM 682189105 774,334 406,700 110.63 7,279 140.31 0.0063
2014-02-13 2013-12-31 13F ON SEMICONDUCTOR COM 682189105 367,634 -4,250 -1.14 3,029 11.57 0.0027
2013-11-14 2013-09-30 13F ON SEMICONDUCTOR COM 682189105 371,884 -6,273 -1.66 2,715 -11.16 0.0027
2013-08-13 2013-06-30 13F ON SEMICONDUCTOR COM 682189105 378,157 378,157 3,056 0.0032
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.