Who owns Power Integrations (POWI)
Which tracked institutional funds hold POWI, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See POWI company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on POWI is one-sided between 2026-Q1 and 2026-Q2: 158 added or opened and 43 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
POWI’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes POWI more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in POWI divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 342 tracked filers holding POWI, 206 increased or opened the position and 158 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in POWI between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 36
- CONGRESS ASSET MANAGEMENT CO$78M
- MASSACHUSETTS FINANCIAL SERVICES CO /MA/$64M
- Aperture Investors, LLC$26M
- Arosa Capital Management LP$10M
- JANE STREET GROUP, LLC$10M
- Allspring Global Investments Holdings, LLC$6M
Full exits 28
- Hudson Bay Capital Management LP$51M
- MARSHALL WACE, LLP$18M
- NOMURA HOLDINGS INC$17M
- NORGES BANK$14M
- Foresight Group Ltd Liability Partnership$11M
- SILVERCREST ASSET MANAGEMENT GROUP LLC$11M
Largest adds
- BlackRock, Inc.$422M
- VANGUARD PORTFOLIO MANAGEMENT LLC$180M
- WELLINGTON MANAGEMENT GROUP LLP$132M
- STATE STREET CORP$110M
- PRICE T ROWE ASSOCIATES INC /MD/$90M
- VANGUARD CAPITAL MANAGEMENT LLC$82M
Largest trims
- NEUBERGER BERMAN GROUP LLC$32M
- WCM INVESTMENT MANAGEMENT, LLC$6M
- RIVERBRIDGE PARTNERS LLC$6M
- Holocene Advisors, LP$3M
- AQR CAPITAL MANAGEMENT LLC$3M
- UBS Group AG$2M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 8,722,053 | $731M | 14.4% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 5,190,284 | $435M | 8.6% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 3,595,855 | $301M | 5.9% | 2026-Q2 |
| STATE STREET CORP added | 3,194,155 | $267M | 5.3% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 2,511,196 | $210M | 4.1% | 2026-Q2 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC added | 2,382,007 | $200M | 3.9% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC trimmed | 2,020,390 | $169M | 3.3% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 1,924,939 | $161M | 3.2% | 2026-Q2 |
| DISCIPLINED GROWTH INVESTORS INC /MN trimmed | 1,891,864 | $158M | 3.1% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,803,038 | $151M | 3.0% | 2026-Q2 |
| SNYDER CAPITAL MANAGEMENT L P trimmed | 1,766,507 | $148M | 2.9% | 2026-Q2 |
| Robeco Schweiz AG added | 1,340,404 | $112M | 2.2% | 2026-Q2 |
| MORGAN STANLEY trimmed | 1,192,455 | $100M | 2.0% | 2026-Q2 |
| Capital International Investors added | 1,183,746 | $99M | 2.0% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 1,085,077 | $91M | 1.8% | 2026-Q2 |
| Nuveen, LLC trimmed | 1,020,059 | $85M | 1.7% | 2026-Q2 |
| CONGRESS ASSET MANAGEMENT CO added | 930,059 | $78M | 1.5% | 2026-Q2 |
| Copeland Capital Management, LLC trimmed | 882,810 | $74M | 1.5% | 2026-Q2 |
| Boston Trust Walden Corp added | 882,471 | $74M | 1.5% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 879,254 | $70M | 1.4% | 2026-Q2 |
| Invesco Ltd. added | 870,396 | $73M | 1.4% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 781,675 | $65M | 1.3% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ new | 767,672 | $64M | 1.3% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 764,474 | $64M | 1.3% | 2026-Q2 |
| Stephens Investment Management Group LLC added | 755,549 | $63M | 1.2% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 753,514 | $63M | 1.2% | 2026-Q2 |
| WESTWOOD HOLDINGS GROUP INC trimmed | 714,227 | $60M | 1.2% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. trimmed | 502,006 | $42M | 0.8% | 2026-Q2 |
| BROWN ADVISORY INC trimmed | 477,227 | $40M | 0.8% | 2026-Q2 |
| Bank of New York Mellon Corp added | 466,513 | $39M | 0.8% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 409,271 | $34M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 400,845 | $34M | 0.7% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 381,535 | $32M | 0.6% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 379,264 | $32M | 0.6% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 370,174 | $31M | 0.6% | 2026-Q2 |
| UBS Group AG trimmed | 359,770 | $30M | 0.6% | 2026-Q2 |
| ASR Vermogensbeheer N.V. added | 356,636 | $30M | 0.6% | 2026-Q2 |
| Tributary Capital Management, LLC added | 332,001 | $28M | 0.5% | 2026-Q2 |
| Aperture Investors, LLC new | 307,841 | $26M | 0.5% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 282,650 | $24M | 0.5% | 2026-Q2 |
| LOOMIS SAYLES & CO L P added | 280,087 | $23M | 0.5% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 272,404 | $23M | 0.4% | 2026-Q2 |
| FEDERATED HERMES, INC. added | 267,665 | $22M | 0.4% | 2026-Q2 |
| EMERALD ADVISERS, LLC added | 264,342 | $22M | 0.4% | 2026-Q2 |
| SEI INVESTMENTS CO added | 257,799 | $22M | 0.4% | 2026-Q2 |
| ProShare Advisors LLC trimmed | 195,670 | $16M | 0.3% | 2026-Q2 |
| FIRST TRUST ADVISORS LP trimmed | 191,764 | $16M | 0.3% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 191,450 | $16M | 0.3% | 2026-Q2 |
| Granite Investment Partners, LLC trimmed | 186,420 | $16M | 0.3% | 2026-Q2 |
| CRAWFORD INVESTMENT COUNSEL INC trimmed | 176,147 | $15M | 0.3% | 2026-Q2 |
| EMERALD MUTUAL FUND ADVISERS TRUST added | 172,196 | $14M | 0.3% | 2026-Q2 |
| Ceredex Value Advisors LLC trimmed | 161,400 | $14M | 0.3% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 150,103 | $13M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 139,613 | $12M | 0.2% | 2026-Q2 |
| RIVERBRIDGE PARTNERS LLC trimmed | 138,538 | $12M | 0.2% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 136,588 | $11M | 0.2% | 2026-Q2 |
| Legal & General Group Plc added | 133,777 | $11M | 0.2% | 2026-Q2 |
| Arosa Capital Management LP added | 125,000 | $10M | 0.2% | 2026-Q2 |
| JANE STREET GROUP, LLC trimmed | 117,524 | $10M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 108,600 | $9M | 0.2% | 2026-Q2 |
| HERALD INVESTMENT MANAGEMENT Ltd trimmed | 100,384 | $8M | 0.2% | 2026-Q2 |
| Russell Investments Group, Ltd. trimmed | 99,377 | $8M | 0.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 94,622 | $8M | 0.2% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH added | 91,727 | $8M | 0.2% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 89,255 | $7M | 0.1% | 2026-Q2 |
| NICHOLAS COMPANY, INC. trimmed | 85,600 | $7M | 0.1% | 2026-Q2 |
| Creative Planning added | 76,303 | $6M | 0.1% | 2026-Q2 |
| OSAIC HOLDINGS, INC. added | 71,593 | $6M | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 70,958 | $4M | 0.1% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC added | 69,905 | $6M | 0.1% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 67,269 | $6M | 0.1% | 2026-Q2 |
| Ariose Capital Management Ltd new | 66,578 | $6M | 0.1% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC added | 62,688 | $5M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 62,369 | $5M | 0.1% | 2026-Q2 |
| PALISADE CAPITAL MANAGEMENT, LP new | 57,159 | $5M | 0.1% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 54,451 | $5M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 51,569 | $4M | 0.1% | 2026-Q2 |
| STIFEL FINANCIAL CORP trimmed | 50,845 | $4M | 0.1% | 2026-Q2 |
| XTX Topco Ltd added | 46,758 | $4M | 0.1% | 2026-Q2 |
| Madison Asset Management, LLC trimmed | 45,678 | $4M | 0.1% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 43,596 | $4M | 0.1% | 2026-Q2 |
| Cannell & Spears LLC trimmed | 43,171 | $4M | 0.1% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 42,674 | $4M | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 41,510 | $3M | 0.1% | 2026-Q2 |
| Man Group plc added | 40,902 | $3M | 0.1% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 40,515 | $3M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM added | 39,988 | $3M | 0.1% | 2026-Q2 |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 39,654 | $3M | 0.1% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 39,222 | $3M | 0.1% | 2026-Q2 |
| VAN ECK ASSOCIATES CORP added | 35,988 | $3M | 0.1% | 2026-Q2 |
| Lisanti Capital Growth, LLC new | 34,790 | $3M | 0.1% | 2026-Q2 |
| FIRST NATIONAL BANK OF OMAHA trimmed | 34,396 | $3M | 0.1% | 2026-Q2 |
| LPL Financial LLC trimmed | 34,373 | $3M | 0.1% | 2026-Q2 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO trimmed | 33,197 | $3M | 0.1% | 2026-Q2 |
| Illinois Municipal Retirement Fund added | 32,992 | $3M | 0.1% | 2026-Q2 |
| MetLife Investment Management, LLC added | 32,635 | $3M | 0.1% | 2026-Q2 |
| Incline Global Management LLC new | 32,493 | $3M | 0.1% | 2026-Q2 |
| CONNORS INVESTOR SERVICES INC trimmed | 31,430 | $3M | 0.1% | 2026-Q2 |
| M&T Bank Corp added | 28,449 | $2M | 0.0% | 2026-Q2 |
| Moody Aldrich Partners LLC new | 28,119 | $2M | 0.0% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.