As of November 6, 2026, 5 holders' latest Schedule 13D or 13G filings report owning 5% or more of Power Integrations Inc. The largest reported stake is BlackRock, Inc.'s, at 14.9%. 9 filings are on record since November 10, 2025 (Schedule 13G/A, January 21, 2026).
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Key facts
- · Reporting person: Neuberger Berman Group LLC · Sole voting: 0 · Shared voting: 2,371,036 · Sole dispositive: 0 · Shared dispositive: 2,521,331 · SCHEDULE 13G/A, 2026-06-04
- · Reporting person: Wellington Management Group LLP · Sole voting: 0 · Shared voting: 2,592,788 · Sole dispositive: 0 · Shared dispositive: 3,356,153 · SCHEDULE 13G, 2026-05-15
- · Reporting person: Vanguard Capital Management · Sole voting: 425,539 · Shared voting: 0 · Sole dispositive: 2,932,458 · Shared dispositive: 0 · SCHEDULE 13G, 2026-04-30
- · Reporting person: Vanguard Portfolio Management · Sole voting: 47,990 · Shared voting: 0 · Sole dispositive: 5,023,849 · Shared dispositive: 0 · SCHEDULE 13G, 2026-04-29
- · Holder: The Vanguard Group · Percent: 0% · SCHEDULE 13G/A
Power Integrations Inc has 9 Schedule 13D or 13G filings on record since 2025-11-10. 5 holders' latest filing reports 5% or more of common. Each figure below is the holder's own, as filed, with the filing linked.
Layoffs on record: 1 filing or notice, latest 2026-02-05 (layoff filings and notices).
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| BlackRock, Inc. | 14.9% | 8,227,124 | SCHEDULE 13G/A, 2026-01-21 | 2025-12-31 |
| Vanguard Portfolio Management | 9.05% | 5,023,849 | SCHEDULE 13G, 2026-04-29 | 2026-03-31 |
| State Street Corporation | 6.1% | 3,400,970 | SCHEDULE 13G, 2026-02-09 | 2025-12-31 |
| Wellington Management Group LLP | 6% | 3,356,153 | SCHEDULE 13G, 2026-05-15 | 2026-03-31 |
| Vanguard Capital Management | 5.28% | 2,932,458 | SCHEDULE 13G, 2026-04-30 | 2026-03-31 |
| Neuberger Berman Group LLC | 4.5% | 2,521,331 | SCHEDULE 13G/A, 2026-06-04 | 2026-05-31 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-27 | 2026-03-13 |
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More on Power Integrations Inc and the records around it.
Power Integrations Inc elsewhere on the record
- Leadership changes Aug 2026
- Layoff notices Feb 2026
- Who owns it
Companies that share a holder
- Neuberger Berman Group LLC also filed stake reports on 37 other companies: Stock Yards Bancorp, Inc. (Nov 2026), TRANSCAT INC (Nov 2026), Hagerty Inc CLass A (Oct 2026)
- Wellington Management Group LLP also filed stake reports on 240 other companies: Hub Group, Inc. (Oct 2026), Latham Group, Inc. (Oct 2026), Redwood Trust, Inc. (Oct 2026)
- STATE STREET CORPORATION also filed stake reports on 343 other companies: TRADE DESK INC/THE (Oct 2026), CENTRUS ENERGY CORP (Sep 2026), ACADIA PHARMACEUTICALS INC (Aug 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Vanguard Portfolio Management | 47,990 | 0 | 5,023,849 | 0 | SCHEDULE 13G, 2026-04-29 |
| Wellington Management Group LLP | 0 | 2,592,788 | 0 | 3,356,153 | SCHEDULE 13G, 2026-05-15 |
| Wellington Group Holdings LLP | 0 | 2,592,788 | 0 | 3,356,153 | SCHEDULE 13G, 2026-05-15 |
| Wellington Investment Advisors Holdings LLP | 0 | 2,592,788 | 0 | 3,356,153 | SCHEDULE 13G, 2026-05-15 |
| Wellington Management Company LLP | 0 | 2,549,197 | 0 | 3,054,286 | SCHEDULE 13G, 2026-05-15 |
| Vanguard Capital Management | 425,539 | 0 | 2,932,458 | 0 | SCHEDULE 13G, 2026-04-30 |
| Neuberger Berman Group LLC | 0 | 2,371,036 | 0 | 2,521,331 | SCHEDULE 13G/A, 2026-06-04 |
| Neuberger Berman Investment Advisers LLC | 0 | 2,301,828 | 0 | 2,521,331 | SCHEDULE 13G/A, 2026-06-04 |
The latest filing identifies Power Integrations Inc by CUSIP 739276103 and gives its principal executive office as 5245 HELLYER AVE, SAN JOSE, CA 95138 (SCHEDULE 13G/A, 2026-06-04).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-11-10 | State Street Corporation | 5.1% | SCHEDULE 13G |
| 2026-01-21 | BlackRock, Inc. | 14.9% | SCHEDULE 13G/A |
| 2026-01-30 | The Vanguard Group | 13.65% | SCHEDULE 13G/A |
| 2026-02-09 | State Street Corporation | 6.1% | SCHEDULE 13G |
| 2026-03-27 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-04-29 | Vanguard Portfolio Management | 9.05% | SCHEDULE 13G |
| 2026-04-30 | Vanguard Capital Management | 5.28% | SCHEDULE 13G |
| 2026-05-15 | Wellington Management Group LLP | 6% | SCHEDULE 13G |
| 2026-06-04 | Neuberger Berman Group LLC | 4.5% | SCHEDULE 13G/A |
Questions about who owns Power Integrations Inc
Who owns Power Integrations Inc?
On this page, 5 holders' latest ownership filings report 5% or more of Power Integrations Inc: BlackRock, Inc. (14.9%, Schedule 13G/A, filed 2026-01-21), Vanguard Portfolio Management (9.05%, Schedule 13G, filed 2026-04-29), State Street Corporation (6.1%, Schedule 13G, filed 2026-02-09), Wellington Management Group LLP (6%, Schedule 13G, filed 2026-05-15) and Vanguard Capital Management (5.28%, Schedule 13G, filed 2026-04-30).
Who are the largest shareholders of Power Integrations Inc?
By the share each holder's latest filing reports, the largest holders of Power Integrations Inc on this page are BlackRock, Inc. (14.9%), Vanguard Portfolio Management (9.05%) and State Street Corporation (6.1%).
When did BlackRock, Inc. buy into Power Integrations Inc?
The filings give report dates, not purchase dates. The earliest filing from BlackRock, Inc. on this page is the Schedule 13G/A, filed 2026-01-21, reporting 14.9%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 9 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for Power Integrations Inc
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| August 14, 2026 | Leadership change: Sunil Gupta departs, Senior Vice President, Operations | — | Leadership changes | Source |
| May 7, 2026 | Leadership change: Mike Balow appointed, Senior Vice President, Worldwide Sales | — | Leadership changes | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.