POWER INTEGRATIONS INC (POWI) Institutional Shareholders
POWER INTEGRATIONS INC (POWI) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $5.22B in POWI holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of POWI tracked by InsiderSet, reporting ownership valued at approximately $730.56M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $415.61M, representing an estimated loss of -43.11% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 53% of the total disclosed POWI value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Portfolio Management Llc, Wellington Management Group Llp, and several other long-term asset managers with concentrated positions in POWER INTEGRATIONS INC (POWI).
This page ranks the largest institutional POWI shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
356
Total Reported Value
$5.22B
Largest Holder
Blackrock, Inc.
Largest Position
$730.56M
Insider Transactions (90d)
8
Latest Filing Quarter
Q2 2026
New Institutional Positions
77
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 8,722,053 | $730,559,121 | $415,605,825 | -$314,953,296 | -43.11% | |
| Vanguard Portfolio Management Llc | 0.02% | 5,190,284 | $434,738,188 | $247,317,033 | -$187,421,155 | -43.11% | |
| Wellington Management Group Llp | 0.05% | 3,595,855 | $301,188,815 | $171,342,491 | -$129,846,324 | -43.11% | |
| State Street Corp | 0.01% | 3,194,155 | $267,494,908 | $152,201,486 | -$115,293,422 | -43.10% | |
| Vanguard Capital Management Llc | 0.00% | 2,511,196 | $210,337,777 | $119,658,489 | -$90,679,288 | -43.11% | |
| William Blair Investment Management, Llc | 0.60% | 2,382,007 | $199,516,906 | $113,502,634 | -$86,014,272 | -43.11% | |
| Neuberger Berman Group Llc | 0.11% | 2,020,390 | $169,227,893 | $96,271,584 | -$72,956,310 | -43.11% | |
| Price T Rowe Associates Inc | 0.02% | 1,924,939 | $161,234,000 | $91,723,343 | -$69,510,657 | -43.11% | |
| Disciplined Growth Investors | Fred Martin | 2.68% | 1,891,864 | $158,462,571 | $90,147,320 | -$68,315,251 | -43.11% |
| Geode Capital Management, Llc | 0.01% | 1,803,038 | $151,043,419 | $85,914,761 | -$65,128,658 | -43.12% | |
| Snyder Capital Management L P | 2.56% | 1,766,507 | $147,962,626 | $84,174,059 | -$63,788,567 | -43.11% | |
| Robeco Schweiz Ag | 1.80% | 1,340,404 | $112,272,239 | $63,870,251 | -$48,401,988 | -43.11% | |
| Morgan Stanley | 0.01% | 1,192,455 | $99,880,271 | $56,820,481 | -$43,059,790 | -43.11% | |
| Capital International Investors | 0.02% | 1,183,746 | $99,150,565 | $56,405,497 | -$42,745,068 | -43.11% | |
| Dimensional Fund Advisors Lp | 0.02% | 1,085,077 | $90,871,252 | $51,703,919 | -$39,167,333 | -43.10% | |
| Nuveen, Llc | 0.02% | 1,020,059 | $85,440,106 | $48,605,811 | -$36,834,295 | -43.11% | |
| Congress Asset Management Co | 0.48% | 930,059 | $77,901,769 | $44,317,311 | -$33,584,458 | -43.11% | |
| Copeland Capital Management, Llc | 1.52% | 882,810 | $73,944,170 | $42,065,897 | -$31,878,274 | -43.11% | |
| Boston Trust Walden Corp | 0.56% | 882,471 | $73,915,771 | $42,049,743 | -$31,866,028 | -43.11% | |
| Invesco Ltd. | 0.01% | 870,396 | $72,904,371 | $41,474,369 | -$31,430,002 | -43.11% | |
| Jpmorgan Chase & Co | 0.00% | 879,254 | $69,620,927 | $41,896,453 | -$27,724,474 | -39.82% | |
| American Century Companies Inc | 0.03% | 781,675 | $65,473,238 | $37,246,814 | -$28,226,424 | -43.11% | |
| Massachusetts Financial Services Co | 0.02% | 767,672 | $64,295,211 | $36,579,571 | -$27,715,640 | -43.11% | |
| Northern Trust Corp | 0.01% | 764,474 | $64,032,341 | $36,427,186 | -$27,605,155 | -43.11% | |
| Stephens Investment Management Group Llc | 0.68% | 755,549 | $63,284,784 | $36,001,910 | -$27,282,874 | -43.11% | |
| Charles Schwab Investment Management Inc | 0.01% | 753,514 | $63,114,333 | $35,904,942 | -$27,209,391 | -43.11% | |
| Westwood Holdings Group Inc | 0.45% | 714,227 | $59,823,652 | $34,032,917 | -$25,790,735 | -43.11% | |
| Bnp Paribas Asset Management Holding S.A. | 0.04% | 502,006 | $42,048,022 | $23,920,586 | -$18,127,436 | -43.11% | |
| Brown Advisory Inc | 0.06% | 477,227 | $39,972,558 | $22,739,867 | -$17,232,691 | -43.11% | |
| Bank Of New York Mellon Corp | 0.01% | 466,513 | $39,075,133 | $22,229,344 | -$16,845,789 | -43.11% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.06% | 409,271 | $34,280,539 | $19,501,763 | -$14,778,776 | -43.11% | |
| Vanguard Fiduciary Trust Co | 0.01% | 400,845 | $33,574,777 | $19,100,264 | -$14,474,513 | -43.11% | |
| Bank Of America Corp | 0.00% | 381,535 | $31,957,373 | $18,180,143 | -$13,777,230 | -43.11% | |
| Goldman Sachs Group Inc | 0.00% | 379,264 | $31,767,154 | $18,071,930 | -$13,695,224 | -43.11% | |
| Ameriprise Financial Inc | 0.01% | 370,174 | $31,005,817 | $17,638,791 | -$13,367,026 | -43.11% | |
| Ubs Group Ag | 0.00% | 359,770 | $30,134,335 | $17,143,041 | -$12,991,295 | -43.11% | |
| Asr Vermogensbeheer N.V. | 0.31% | 356,636 | $29,870,393 | $16,993,705 | -$12,876,688 | -43.11% | |
| Tributary Capital Management, Llc | 2.29% | 332,001 | $27,808,424 | $15,819,848 | -$11,988,576 | -43.11% | |
| Aperture Investors, Llc | 2.74% | 307,841 | $25,784,762 | $14,668,624 | -$11,116,138 | -43.11% | |
| Envestnet Asset Management Inc | 0.01% | 282,650 | $23,674,804 | $13,468,273 | -$10,206,532 | -43.11% | |
| Loomis Sayles & Co L P | 0.03% | 280,087 | $23,460,087 | $13,346,146 | -$10,113,941 | -43.11% | |
| Principal Financial Group Inc | 0.01% | 272,404 | $22,816,559 | $12,980,051 | -$9,836,508 | -43.11% | |
| Federated Hermes, Inc. | 0.03% | 267,665 | $22,419,620 | $12,754,237 | -$9,665,383 | -43.11% | |
| Emerald Advisers, Llc | 0.52% | 264,342 | $22,141,286 | $12,595,896 | -$9,545,390 | -43.11% | |
| Sei Investments Co | 0.02% | 257,799 | $21,594,004 | $12,284,122 | -$9,309,882 | -43.11% | |
| Proshare Advisors Llc | 0.02% | 195,670 | $16,389,320 | $9,323,676 | -$7,065,645 | -43.11% | |
| First Trust Advisors Lp | 0.01% | 191,764 | $16,062,152 | $9,137,555 | -$6,924,597 | -43.11% | |
| Public Sector Pension Investment Board | 0.04% | 191,450 | $16,035,852 | $9,122,593 | -$6,913,260 | -43.11% | |
| Granite Investment Partners, Llc | 0.80% | 186,420 | $15,614,539 | $8,882,913 | -$6,731,626 | -43.11% | |
| Crawford Investment Counsel Inc | 0.25% | 176,147 | $14,754,034 | $8,393,405 | -$6,360,629 | -43.11% |
Frequently asked questions about POWI
Who owns the most POWI stock?
The largest holders of POWI are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for POWER INTEGRATIONS INC (POWI).
Is POWI widely held by superinvestors?
Many widely followed stocks like POWI appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly POWI is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.