POWER INTEGRATIONS INC (POWI) Stock Institutional Trading Activity


POWER INTEGRATIONS INC (POWI) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Disciplined Growth Investors and Renaissance Technologies LLC. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q2 2017Disciplined Growth InvestorsSell-751,234,687$90,009
Q1 2017Renaissance Technologies LLCBuy9,200366,200$24,078
Q1 2017Disciplined Growth InvestorsSell-23,9651,234,762$81,186
Q4 2016Renaissance Technologies LLCBuy41,500357,000$24,222
Q4 2016Disciplined Growth InvestorsBuy7,9301,258,727$85,405
Q3 2016Renaissance Technologies LLCBuy2,700315,500$19,886
Q3 2016Disciplined Growth InvestorsSell-1,8501,250,797$78,838
Q2 2016Renaissance Technologies LLCBuy136,300312,800$15,662
Q2 2016Disciplined Growth InvestorsSell-7001,252,647$62,720
Q1 2016Renaissance Technologies LLCBuy83,800176,500$8,765
Q1 2016Disciplined Growth InvestorsBuy245,7501,253,347$62,241
Q4 2015Renaissance Technologies LLCBuy60,70092,700$4,508
Q4 2015Disciplined Growth InvestorsSell-1,6001,007,597$48,999
Q3 2015Renaissance Technologies LLCBuy27,50032,000$1,349
Q3 2015Disciplined Growth InvestorsBuy189,4221,009,197$42,558
Q2 2015Renaissance Technologies LLCSell-29,4004,500$203
Q2 2015Disciplined Growth InvestorsBuy147,875819,775$37,037
Q1 2015Renaissance Technologies LLCBuy10,13933,900$1,766
Q1 2015Disciplined Growth InvestorsBuy233,025671,900$34,993
Q4 2014Renaissance Technologies LLCSell-152,33923,761$1,229
Q4 2014Disciplined Growth InvestorsBuy438,875438,875$22,707
Q1 2014Renaissance Technologies LLCBuy46,300176,100$11,584
Q4 2013Renaissance Technologies LLCBuy101,600129,800$7,245
Q3 2013Renaissance Technologies LLCSell-40,10028,200$1,527
Q2 2013Renaissance Technologies LLCBuy68,30068,300$2,770

Frequently asked questions about POWI activity

  • Which institutional owners are buying POWI?

    Institutional owners buying POWI include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in POWI activity?

    "Buy" means an investor increased their reported position in POWI compared to the prior reporting period. This reflects growing exposure to POWER INTEGRATIONS INC (POWI) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in POWI increasing?

    Institutional interest in POWI can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.