Power Integrations, Inc.
US ˙ NasdaqGS ˙ US7392761034

SecurityPOWI / Power Integrations, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership15,554 shares
Latest Disclosed Value $ 796,364
Citigroup Inc reports 87.41% decrease in ownership of POWI / Power Integrations, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 15,554 shares of Power Integrations, Inc. (US:POWI) valued at $796,365 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 123,500 shares of Power Integrations, Inc.. This represents a change in shares of -87.41% during the quarter. The current value of the position is $1,326,756 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)
2026-05-11 2026-03-31 13F POWER INTEGRATIONS COM 739276103 15,554 -107,946 -87.41 796 -81.86 0.0002
2026-02-13 2025-12-31 13F POWER INTEGRATIONS COM 739276103 123,500 -10,564 -7.88 4,389 -18.57 0.0019
2025-11-10 2025-09-30 13F POWER INTEGRATIONS COM 739276103 134,064 19,139 16.65 5,391 -16.10 0.0024
2025-08-11 2025-06-30 13F POWER INTEGRATIONS COM 739276103 114,925 -259,121 -69.28 6,424 -65.99 0.0032
2025-05-12 2025-03-31 13F POWER INTEGRATIONS COM 739276103 374,046 42,816 12.93 18,889 -7.57 0.0097
2025-02-12 2024-12-31 13F POWER INTEGRATIONS COM 739276103 331,230 274,618 485.09 20,437 463.13 0.0121
2024-11-12 2024-09-30 13F POWER INTEGRATIONS COM 739276103 56,612 34,707 158.44 3,630 136.11 0.0021
2024-08-12 2024-06-30 13F POWER INTEGRATIONS COM 739276103 21,905 -18,522 -45.82 1,538 -46.85 0.0010
2024-05-10 2024-03-31 13F POWER INTEGRATIONS COM 739276103 40,427 10,642 35.73 2,893 18.28 0.0019
2024-02-09 2023-12-31 13F POWER INTEGRATIONS COM 739276103 29,785 -9,216 -23.63 2,446 -17.84 0.0017
2023-12-06 2023-09-30 13F/A-1 POWER INTEGRATIONS COM 739276103 39,001 -5,619 -12.59 2,976 -29.55 0.0022
2023-11-09 2023-09-30 13F POWER INTEGRATIONS COM 739276103 39,001 -5,619 2,976 0.0009
2023-08-10 2023-06-30 13F POWER INTEGRATIONS COM 739276103 44,620 14,454 47.91 4,224 65.45 0.0028
2023-05-11 2023-03-31 13F POWER INTEGRATIONS COM 739276103 30,166 -33,164 -52.37 2,553 -43.79 0.0018
2023-02-09 2022-12-31 13F POWER INTEGRATIONS COM 739276103 63,330 27,175 75.16 4,542 95.27 0.0036
2022-11-10 2022-09-30 13F POWER INTEGRATIONS COM 739276103 36,155 -13,611 -27.35 2,326 -37.71 0.0017
2022-08-10 2022-06-30 13F POWER INTEGRATIONS COM 739276103 49,766 4,234 9.30 3,734 -11.52 0.0028
2022-05-12 2022-03-31 13F POWER INTEGRATIONS COM 739276103 45,532 -45,969 -50.24 4,220 -50.35 0.0026
2022-02-10 2021-12-31 13F POWER INTEGRATIONS COM 739276103 91,501 24,015 35.59 8,500 27.25 0.0046
2021-11-10 2021-09-30 13F POWER INTEGRATIONS COM 739276103 67,486 9,064 15.51 6,680 39.34 0.0039
2021-08-10 2021-06-30 13F POWER INTEGRATIONS COM 739276103 58,422 25,695 78.51 4,794 79.75 0.0029
2021-05-13 2021-03-31 13F POWER INTEGRATIONS COM 739276103 32,727 -4,007 -10.91 2,667 -11.31 0.0017
2021-02-11 2020-12-31 13F POWER INTEGRATIONS COM 739276103 36,734 203 0.56 3,007 48.57 0.0018
2020-11-12 2020-09-30 13F POWER INTEGRATIONS COM 739276103 36,531 6,058 19.88 2,024 -43.78 0.0013
2020-08-12 2020-06-30 13F POWER INTEGRATIONS COM 739276103 30,473 10,040 49.14 3,600 99.56 0.0028
2020-05-12 2020-03-31 13F POWER INTEGRATIONS COM 739276103 20,433 -1,613 -7.32 1,804 -17.25 0.0016
2020-02-12 2019-12-31 13F POWER INTEGRATIONS COM 739276103 22,046 -3,965 -15.24 2,180 -7.35 0.0016
2019-11-08 2019-09-30 13F POWER INTEGRATIONS COM 739276103 26,011 -180 -0.69 2,353 12.05 0.0019
2019-08-12 2019-06-30 13F POWER INTEGRATIONS COM 739276103 26,191 4,718 21.97 2,100 39.81 0.0017
2019-05-13 2019-03-31 13F POWER INTEGRATIONS COM 739276103 21,473 8,795 69.37 1,502 94.31 0.0014
2019-02-12 2018-12-31 13F POWER INTEGRATIONS COM 739276103 12,678 6,139 93.88 773 86.71 0.0008
2018-11-13 2018-09-30 13F POWER INTEGRATIONS COM 739276103 6,539 4,751 265.72 414 218.46 0.0004
2018-08-10 2018-06-30 13F POWER INTEGRATIONS COM 739276103 1,788 -1,364 -43.27 130 -39.53 0.0001
2018-05-11 2018-03-31 13F POWER INTEGRATIONS COM 739276103 3,152 1,071 51.47 215 40.52 0.0002
2018-02-12 2017-12-31 13F POWER INTEGRATIONS COM 739276103 2,081 -2,528 -54.85 153 -54.60 0.0001
2017-11-13 2017-09-30 13F POWER INTEGRATIONS COM 739276103 4,609 -23,022 -83.32 337 -83.27 0.0003
2017-08-11 2017-06-30 13F POWER INTEGRATIONS COM 739276103 27,631 -1,520 -5.21 2,014 5.06 0.0018
2017-05-12 2017-03-31 13F POWER INTEGRATIONS COM 739276103 29,151 -20,246 -40.99 1,917 -42.81 0.0017
2017-02-10 2016-12-31 13F POWER INTEGRATIONS COM 739276103 49,397 47,900 3,199.73 3,352 3,428.42 0.0030
2016-11-10 2016-09-30 13F POWER INTEGRATIONS COM 739276103 1,497 -13,179 -89.80 95 -87.07 0.0001
2016-08-12 2016-06-30 13F POWER INTEGRATIONS COM 739276103 14,676 -9,821 -40.09 735 -39.61 0.0008
2016-05-13 2016-03-31 13F POWER INTEGRATIONS COM 739276103 24,497 15,284 165.90 1,217 171.65 0.0014
2016-02-12 2015-12-31 13F POWER INTEGRATIONS COM 739276103 9,213 -2,721 -22.80 448 -10.93 0.0004
2015-11-13 2015-09-30 13F POWER INTEGRATIONS COM 739276103 11,934 8,849 286.84 503 261.87 0.0005
2015-08-13 2015-06-30 13F POWER INTEGRATIONS COM 739276103 3,085 -1,448 -31.94 139 -41.10 0.0001
2015-05-14 2015-03-31 13F POWER INTEGRATIONS COM 739276103 4,533 -9,286 -67.20 236 -66.99 0.0002
2015-02-17 2014-12-31 13F POWER INTEGRATIONS COM 739276103 13,819 10,378 301.60 715 286.49 0.0006
2014-11-14 2014-09-30 13F POWER INTEGRATIONS COM 739276103 3,441 1,412 69.59 185 59.48 0.0002
2014-08-14 2014-06-30 13F POWER INTEGRATIONS COM 739276103 2,029 -7,139 -77.87 116 -80.76 0.0001
2014-05-15 2014-03-31 13F POWER INTEGRATIONS COM 739276103 9,168 -1,206 -11.63 603 4.33 0.0006
2014-02-14 2013-12-31 13F POWER INTEGRATIONS COM 739276103 10,374 9,396 960.74 578 990.57 0.0005
2013-11-14 2013-09-30 13F POWER INTEGRATIONS COM 739276103 978 -2,001 -67.17 53 -56.56 0.0000
2013-08-14 2013-06-30 13F POWER INTEGRATIONS COM 739276103 2,979 2,979 122 0.0001
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.