Power Integrations Inc

POWI

Exchange: Nasdaq
Industry: Semiconductors & Related Devices
SEC CIK: 0000833640

SEC filings (opens in a new tab)

In the last 90 days, Power Integrations Inc insiders filed 0 open-market purchases and 1 sale; 373 institutions reported holding it in 13F filings for Q2 2026, worth $5.24B in total; no superinvestor holds it.

Q1 2026 vs. Q4 2025

How the institutions holding Power Integrations Inc changed between Q4 2025 and Q1 2026.

All holders in Q1 2026 All holders in Q4 2025

13F holders of POWI: Q4 2025 compared with Q1 2026
Measure	Q4 2025	Of which not filed for Q1 2026	Q1 2026	Change
Holders	299	6	308	+15
Shares	59.7M	7.60M	63.5M	+11.4M (+21.9%)
Value	$2.12B	$270.0M	$3.24B	+$1.39B (+75.2%)

6 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (53)

Institutions that held Power Integrations Inc at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to POWI in Q1 2026
Institution	Shares	Value	% of portfolio
Vanguard Portfolio Management LLC	4,975,859	$254.8M	0.01%
Vanguard Capital Management LLC	2,506,919	$128.4M	0.00%
William Blair Investment Management, LLC	2,380,677	$121.9M	0.40%
Hudson Bay Capital Management LP	1,000,000	$51.2M	0.31%
Vanguard Fiduciary Trust Co	385,209	$19.7M	0.00%
WCM Investment Management, LLC	156,928	$7.51M	0.02%
Emerald Advisers, LLC	116,044	$5.94M	0.19%
Emerald Mutual Fund Advisers Trust	61,294	$3.14M	0.15%
Connors Investor Services Inc	59,040	$3.02M	0.28%
Vanguard Asset Management, Ltd	50,789	$2.60M	0.00%
Neo Ivy Capital Management	41,137	$2.11M	0.56%
Scalar Gauge Management, LLC	35,000	$1.79M	1.73%
Illinois Municipal Retirement Fund	28,739	$1.47M	0.02%
Calamos Advisors LLC	23,076	$1.18M	0.00%
Vanguard Global Advisers, LLC	22,850	$1.17M	0.00%
EntryPoint Capital, LLC	16,453	$842.4K	0.25%
Vanguard Investments Australia, Ltd.	14,681	$751.7K	0.00%
Lepercq De Neuflize Asset Management LLC	10,000	$512.0K	0.37%
Van Diest Capital, LLC	9,290	$475.6K	0.37%
Franklin Resources Inc	7,716	$395.1K	0.00%
Tactive Advisors, LLC	7,680	$393.2K	0.11%
Man Group plc	7,609	$389.6K	0.00%
Cerity Partners LLC	7,556	$386.9K	0.00%
Empowered Funds, LLC	6,180	$316.4K	0.00%
Janney Montgomery Scott LLC	5,770	$295.0K	0.00%
Personal Cfo Solutions, LLC	5,527	$283.0K	0.04%
CIBC Asset Management Inc	5,312	$272.0K	0.00%
Xponance, Inc.	5,272	$269.9K	0.00%
MML Investors Services, LLC	4,970	$254.5K	0.00%
Merit Financial Group, LLC	4,927	$252.2K	0.00%
Cim Investment Mangement Inc	4,811	$246.3K	0.07%
O'Shaughnessy Asset Management, LLC	4,721	$241.7K	0.00%
Three Seasons Wealth, LLC	4,523	$231.6K	0.09%
CBOE Vest Financial, LLC	4,248	$217.5K	0.00%
DnB Asset Management AS	4,126	$211.3K	0.00%
Aster Capital Management (DIFC) Ltd	4,074	$205.7K	0.07%
Wiley Bros.-Aintree Capital, LLC	4,000	$204.8K	0.00%
Freestone Grove Partners LP	2,342	$119.9K	0.00%
Sittner & Nelson, LLC	1,878	$96.2K	0.04%
Bayforest Capital Ltd	960	$49.2K	0.06%
Advisory Services Network, LLC	501	$25.6K	0.00%
Mather Group, LLC.	466	$23.9K	0.00%
Kemnay Advisory Services Inc.	449	$23.0K	0.00%
Optiver Holding B.V.	194	$9.93K	0.00%
Ronald Blue Trust, Inc.	185	$9.47K	0.00%
Arlington Trust Co LLC	107	$5.48K	0.00%
Bell Investment Advisors, Inc	92	$4.71K	0.00%
Horizon Investments, LLC	54	$2.77K	0.00%
Whipplewood Advisors, LLC	43	$2.20K	0.00%
Richardson Capital Management LLC	36	$1.84K	0.00%
North Star Investment Management Corp.	14	$717	0.00%
Essential Partners LLC	8	$410	0.00%
Abound Wealth Management	4	$205	0.00%

Sold out (38)

Institutions that held Power Integrations Inc at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of POWI in Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Renaissance Technologies LLC	206,100	$7.32M
Millennium Management LLC	106,559	$3.79M
D. E. Shaw & Co., Inc.	87,212	$3.10M
Canada Pension Plan Investment Board	85,500	$3.04M
Trexquant Investment LP	82,782	$2.94M
Numerai GP LLC	75,079	$2.67M
Engineers Gate Manager LP	67,800	$2.41M
Panagora Asset Management Inc	59,753	$2.12M
Capital Fund Management S.A.	50,599	$1.80M
Campbell & CO Investment Adviser LLC	48,715	$1.73M
Arosa Capital Management LP	40,000	$1.42M
Gsa Capital Partners LLP	30,174	$1.07M
Quantbot Technologies LP	24,215	$860.6K
Algert Global LLC	23,140	$822.4K
Two Sigma Advisers, LP	22,500	$799.6K
Aquatic Capital Management LLC	20,257	$719.9K
Legato Capital Management LLC	20,019	$711.5K
Mirabella Financial Services LLP	18,156	$645.3K
DekaBank Deutsche Girozentrale	8,622	$638.0K
Brevan Howard Capital Management LP	11,948	$424.6K
State of Wyoming	11,217	$398.7K
Teacher Retirement System of Texas	10,616	$377.3K
Oddo BHF Asset Management SAS	9,414	$334.6K
Mackenzie Financial Corp	7,127	$256.0K
Profund Advisors LLC	6,776	$240.8K
Acadian Asset Management LLC	3,709	$131.0K
Kestra Advisory Services, LLC	1,009	$35.9K
Quest Partners LLC	763	$27.1K
GW&K Investment Management, LLC	301	$11.0K
Close Asset Management Ltd	200	$7.00K
Luminist Capital LLC	111	$3.94K
Assetmark, Inc	62	$2.20K
CX Institutional	17	$1.00K
Wealth Watch Advisors, INC	26	$924
Manchester Capital Management LLC	17	$605
Quarry LP	16	$569
Clearstead Advisors, LLC	9	$320
Private Wealth Asset Management, LLC	3	$107

Not filed for Q1 2026 yet (6)

Institutions that held Power Integrations Inc at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding POWI in Q4 2025 that haven't filed for Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Vanguard Group Inc	7,556,919	$268.6M
QSV Equity Investors LLC	21,300	$757.0K
Comerica Bank	17,713	$629.5K
CIBC Private Wealth Group, LLC	453	$16.1K
Global Retirement Partners, LLC	320	$11.4K
GPS Wealth Strategies Group, LLC	60	$2.13K