Who owns Power Integrations (POWI)?
108 holders named in SEC filings declare between 78.9% and 110.2% of Power Integrations' shares outstanding, as of Jul 28, 2026. The largest are BlackRock (15.6%), Vanguard (14.6%) and Wellington (6.4%); the five largest hold 46.6% together. Another 267 institutions hold small positions worth 3.0%. From Mar 31, 2026 to Jun 30, 2026, institutions that filed both quarters bought 14.2% and sold 15.8% of the shares, a net sale of 1.6%; 90 opened a position, 109 added, 108 reduced and 29 sold out. Biggest buyers: CONGRESS ASSET MANAGEMENT CO (+930,059 shares) and MASSACHUSETTS FINANCIAL SERVICES CO /MA/ (+767,672 shares). Biggest sellers: Neuberger Berman Group LLC (-1.9M) and Hudson Bay Capital Management LP (-1.0M). Schedule 13D/G filings since Mar 31, 2026: Neuberger Berman Group LLC fell below 5% (4.5% still declared) on May 31, 2026. Directors and officers, from their latest Form 4: Balu Balakrishnan (0.50%). Over time, 361 managers declared Power Integrations in their 13F for Q2 2026, against 243 for Q4 2019: together at most 112.3% of the shares outstanding, against 95.9%.
| Holder | Filing | Share of capital | As of | Holding since (13F) |
|---|---|---|---|---|
| BlackRock | 13F | 15.6% | Jun 30, 2026 | Q4 2019 or earlier |
| Vanguard | 13F | 14.6% | Jun 30, 2026 | Q4 2019 or earlier |
| Wellington | 13F | 6.4% | Jun 30, 2026 | Q4 2019 or earlier |
| State Street | 13F | 5.7% | Jun 30, 2026 | Q4 2019 or earlier |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 13F | 4.3% | Jun 30, 2026 | Q1 2026 |
| Neuberger Berman Group LLC | 13F | 3.6% | Jun 30, 2026 | Q4 2019 or earlier |
| T. Rowe Price | 13F | 3.4% | Jun 30, 2026 | Q4 2019 or earlier |
| DISCIPLINED GROWTH INVESTORS INC /MN | 13F | 3.4% | Jun 30, 2026 | Q4 2019 or earlier |
| Geode Capital | 13F | 3.2% | Jun 30, 2026 | Q4 2019 or earlier |
| SNYDER CAPITAL MANAGEMENT L P | 13F | 3.2% | Jun 30, 2026 | Q4 2019 or earlier |
| Robeco Schweiz AG | 13F | 2.4% | Jun 30, 2026 | Q4 2019 or earlier |
| Morgan Stanley | 13F | 2.1% | Jun 30, 2026 | Q4 2019 or earlier |
| Capital Group | 13F | 2.1% | Jun 30, 2026 | Q1 2023 |
| Dimensional | 13F | 1.9% | Jun 30, 2026 | Q4 2019 or earlier |
| Nuveen | 13F | 1.8% | Jun 30, 2026 | Q4 2019 or earlier |
| CONGRESS ASSET MANAGEMENT CO | 13F | 1.7% | Jun 30, 2026 | Q2 2026 |
| Copeland Capital Management, LLC | 13F | 1.6% | Jun 30, 2026 | Q4 2019 or earlier |
| Boston Trust Walden Corp | 13F | 1.6% | Jun 30, 2026 | Q4 2019 or earlier |
| JPMorgan | 13F | 1.6% | Jun 30, 2026 | Q4 2019 or earlier |
| Invesco | 13F | 1.6% | Jun 30, 2026 | Q4 2019 or earlier |
| American Century Companies, Inc. | 13F | 1.4% | Jun 30, 2026 | Q4 2025 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 13F | 1.4% | Jun 30, 2026 | Q2 2026 |
| Northern Trust | 13F | 1.4% | Jun 30, 2026 | Q4 2019 or earlier |
| Stephens Investment Management Group LLC | 13F | 1.4% | Jun 30, 2026 | Q4 2019 or earlier |
| Charles Schwab | 13F | 1.3% | Jun 30, 2026 | Q4 2019 or earlier |
Power Integrations institutional ownership over time
| Quarter | 13F managers | Share of the company (upper bound) | Value declared | Held by stock pickers |
|---|---|---|---|---|
| Q4 2019 | 243 | 95.9% | $2.8B | 57.5% |
| Q4 2020 | 278 | 98.9% | $4.8B | 54.9% |
| Q4 2021 | 329 | 95.0% | $5.3B | 57.7% |
| Q4 2022 | 319 | 100.2% | $4.1B | 60.2% |
| Q4 2023 | 333 | 102.8% | $4.8B | 58.5% |
| Q4 2024 | 318 | 101.4% | $3.6B | 56.3% |
| Q4 2025 | 293 | 107.8% | $2.1B | 54.4% |
| Q2 2026 | 361 | 112.3% | $5.2B | 54.5% |
From SEC Form 13F, every quarter since the end of 2019, read like the current quarter: entities of a house summed, a value contradicting its share count set aside. The share of the company is an upper bound — two managers can declare the same shares — over the shares outstanding at that date.