Power Integrations, Inc.
US ˙ NasdaqGS ˙ US7392761034

SecurityPOWI / Power Integrations, Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership66,892 shares
Latest Disclosed Value $ 2,377,342
Alliancebernstein L.p. reports 2.10% increase in ownership of POWI / Power Integrations, Inc.

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 66,892 shares of Power Integrations, Inc. (US:POWI) valued at $3,424,870 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 65,518 shares of Power Integrations, Inc.. This represents a change in shares of 2.10% during the quarter. The current value of the position is $5,705,888 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)
2026-05-15 2026-03-31 13F POWER INTEGRATIONS COM 739276103 66,892 1,374 2.10 2,377 2.10 0.0008
2026-02-17 2025-12-31 13F POWER INTEGRATIONS COM 739276103 65,518 -47,959 -42.26 2,329 -48.97 0.0007
2025-11-14 2025-09-30 13F POWER INTEGRATIONS COM 739276103 113,477 -2,265 -1.96 4,563 -29.48 0.0014
2025-08-14 2025-06-30 13F POWER INTEGRATIONS COM 739276103 115,742 -254 -0.22 6,470 10.45 0.0021
2025-05-15 2025-03-31 13F POWER INTEGRATIONS COM 739276103 115,996 -6,880 -5.60 5,858 -22.74 0.0021
2025-02-12 2024-12-31 13F POWER INTEGRATIONS COM 739276103 122,876 -1,540 -1.24 7,581 -4.96 0.0026
2024-11-14 2024-09-30 13F POWER INTEGRATIONS COM 739276103 124,416 -2,629 -2.07 7,978 -10.54 0.0027
2024-08-14 2024-06-30 13F POWER INTEGRATIONS COM 739276103 127,045 -6,453 -4.83 8,917 -6.64 0.0031
2024-05-14 2024-03-31 13F POWER INTEGRATIONS COM 739276103 133,498 640 0.48 9,552 -12.44 0.0034
2024-02-14 2023-12-31 13F POWER INTEGRATIONS COM 739276103 132,858 -860 -0.64 10,909 6.90 0.0042
2023-11-14 2023-09-30 13F POWER INTEGRATIONS COM 739276103 133,718 -2,633 -1.93 10,204 -20.95 0.0043
2023-08-15 2023-06-30 13F POWER INTEGRATIONS COM 739276103 136,351 23 0.02 12,908 11.87 0.0053
2023-05-15 2023-03-31 13F POWER INTEGRATIONS COM 739276103 136,328 -2,630 -1.89 11,539 15.77 0.0049
2023-02-15 2022-12-31 13F POWER INTEGRATIONS COM 739276103 138,958 345 0.25 9,966 11.78 0.0045
2022-11-15 2022-09-30 13F POWER INTEGRATIONS COM 739276103 138,613 -2,087 -1.48 8,916 -15.52 0.0043
2022-08-15 2022-06-30 13F POWER INTEGRATIONS COM 739276103 140,700 -15,718 -10.05 10,554 -27.20 0.0048
2022-05-13 2022-03-31 13F POWER INTEGRATIONS COM 739276103 156,418 13,784 9.66 14,497 9.42 0.0056
2022-02-14 2021-12-31 13F POWER INTEGRATIONS COM 739276103 142,634 49,022 52.37 13,249 42.97 0.0047
2021-11-10 2021-09-30 13F POWER INTEGRATIONS COM 739276103 93,612 -3,255 -3.36 9,267 16.58 0.0037
2021-07-30 2021-06-30 13F POWER INTEGRATIONS COM 739276103 96,867 750 0.78 7,949 1.49 0.0032
2021-05-06 2021-03-31 13F POWER INTEGRATIONS COM 739276103 96,117 -9,063 -8.62 7,832 -9.04 0.0034
2021-02-08 2020-12-31 13F POWER INTEGRATIONS COM 739276103 105,180 -150 -0.14 8,610 47.56 0.0041
2020-11-12 2020-09-30 13F POWER INTEGRATIONS COM 739276103 105,330 51,220 94.66 5,835 -8.71 0.0031
2020-08-13 2020-06-30 13F POWER INTEGRATIONS COM 739276103 54,110 5,090 10.38 6,392 47.62 0.0038
2020-05-14 2020-03-31 13F POWER INTEGRATIONS COM 739276103 49,020 194 0.40 4,330 -10.33 0.0031
2020-02-18 2019-12-31 13F POWER INTEGRATIONS COM 739276103 48,826 356 0.73 4,829 10.18 0.0027
2019-11-14 2019-09-30 13F POWER INTEGRATIONS COM 739276103 48,470 -3,608 -6.93 4,383 4.96 0.0027
2019-08-14 2019-06-30 13F POWER INTEGRATIONS COM 739276103 52,078 11,570 28.56 4,176 47.41 0.0026
2019-05-14 2019-03-31 13F POWER INTEGRATIONS COM 739276103 40,508 -1,950 -4.59 2,833 9.42 0.0018
2019-02-13 2018-12-31 13F POWER INTEGRATIONS COM 739276103 42,458 1,400 3.41 2,589 -0.23 0.0019
2018-11-08 2018-09-30 13F POWER INTEGRATIONS COM 739276103 41,058 0 0.00 2,595 -13.47 0.0017
2018-08-13 2018-06-30 13F POWER INTEGRATIONS COM 739276103 41,058 0 0.00 2,999 6.88 0.0021
2018-05-14 2018-03-31 13F POWER INTEGRATIONS COM 739276103 41,058 -2,000 -4.64 2,806 -11.40 0.0020
2018-02-13 2017-12-31 13F POWER INTEGRATIONS COM 739276103 43,058 2,900 7.22 3,167 7.72 0.0023
2017-11-13 2017-09-30 13F POWER INTEGRATIONS COM 739276103 40,158 0 0.00 2,940 0.41 0.0022
2017-08-10 2017-06-30 13F POWER INTEGRATIONS COM 739276103 40,158 -4,000 -9.06 2,928 0.86 0.0023
2017-05-11 2017-03-31 13F POWER INTEGRATIONS COM 739276103 44,158 0 0.00 2,903 -3.10 0.0023
2017-02-13 2016-12-31 13F POWER INTEGRATIONS COM 739276103 44,158 -2,000 -4.33 2,996 2.99 0.0025
2016-11-10 2016-09-30 13F POWER INTEGRATIONS COM 739276103 46,158 -1,900 -3.95 2,909 20.91 0.0025
2016-08-11 2016-06-30 13F POWER INTEGRATIONS COM 739276103 48,058 -4,900 -9.25 2,406 -8.52 0.0021
2016-05-13 2016-03-31 13F POWER INTEGRATIONS COM 739276103 52,958 0 0.00 2,630 2.14 0.0022
2016-02-16 2015-12-31 13F/A-1 POWER INTEGRATIONS COM 739276103 52,958 -4,082 -7.16 2,575 7.07 0.0022
2016-02-12 2015-12-31 13F POWER INTEGRATIONS COM 739276103 52,958 2,233
2015-11-13 2015-09-30 13F POWER INTEGRATIONS COM 739276103 57,040 -28 -0.05 2,405 -6.71 0.0021
2015-08-14 2015-06-30 13F POWER INTEGRATIONS COM 739276103 57,068 0 0.00 2,578 -13.26 0.0021
2015-05-13 2015-03-31 13F POWER INTEGRATIONS COM 739276103 57,068 -1,500 -2.56 2,972 -1.91 0.0024
2015-02-13 2014-12-31 13F POWER INTEGRATIONS COM 739276103 58,568 -2,700 -4.41 3,030 -8.27 0.0025
2014-11-13 2014-09-30 13F POWER INTEGRATIONS COM 739276103 61,268 -242,554 -79.83 3,303 -81.11 0.0028
2014-08-13 2014-06-30 13F POWER INTEGRATIONS COM 739276103 303,822 -646,882 -68.04 17,482 -72.05 0.0147
2014-05-13 2014-03-31 13F POWER INTEGRATIONS COM 739276103 950,704 63,772 7.19 62,537 26.31 0.0540
2014-02-13 2013-12-31 13F POWER INTEGRATIONS COM 739276103 886,932 -35,785 -3.88 49,509 -0.91 0.0443
2013-11-14 2013-09-30 13F POWER INTEGRATIONS COM 739276103 922,717 101,339 12.34 49,965 49.98 0.0494
2013-08-13 2013-06-30 13F POWER INTEGRATIONS COM 739276103 821,378 821,378 33,315 0.0354
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.