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Power Integrations Inc

POWI

Held by 1 superinvestor.

Price$74.39
Holders1
Total value$100.3M

SEC 13F · holders

Superinvestors Holding This Security

1 holder · $100.3M combined · this quarter +0 opened / -0 exited

This quarter1 trimmed
Holders 2 → 1 · last 8q
  • Fred Martin
    Value$100.3MWeight (prev→now)1.4% → 2.1% ▲

SEC 13F · notes

Written summary

Power Integrations Inc (POWI) is held by 1 of the superinvestors tracked on Compounder, with a combined $100.3M in reported 13F value. The largest position belongs to Fred Martin, where it makes up 2.1% of the portfolio.

Over the latest quarter, 0 of the tracked filers opened a new position in POWI, 0 added to existing ones, 1 trimmed, and 0 sold out entirely.

Holder counts and values reflect the most recent SEC Form 13F filings, through the quarter ended 2026-03-31. Source: SEC EDGAR. A 13F shows only long US-listed positions and can lag the real portfolio by up to 45 days, so this is disclosed long ownership, not a complete picture.

How to read a 13F

SEC 13F · co-ownership

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Also on

Sources· SEC EDGAR 13F as of 2026-03-31 · filed 2026-05-15

Educational data only — not investment advice. 13F positions are self-reported and can lag up to 45 days.

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