Company · Ownership research

POWER INTEGRATIONS INC POWI

CIK 0000833640 · CUSIP 739276103

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 739276103 (POWI), not CUSIP 739276903 (POWI), CUSIP 739276953 (POWI), and does not merge CUSIPs.

This page lists the top 20 of 148 rows by value; the complete set is available through the API.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$96.53M 1,863,325 shares	0.01%	+60.29K(+3.30%)Added	SEC filing ↗ Nov 6, 2026	▾
02	Boston Trust Walden Corp CIK 1534866 · View history	$66.82M 1,290,017 shares	0.54%	+407.55K(+46.20%)Added	SEC filing ↗ Oct 30, 2026	▾
03	Robeco Schweiz AG CIK 1418427 · View history	$66.72M 1,288,004 shares	1.20%	-52.40K(-3.90%)Reduced	SEC filing ↗ Oct 23, 2026	▾
04	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$57.87M 1,117,122 shares	0.01%	+32.05K(+3.00%)Added	SEC filing ↗ Nov 4, 2026	▾
05	CONGRESS ASSET MANAGEMENT CO CIK 897378 · View history	$47.35M 914,069 shares	0.31%	-15.99K(-1.70%)Reduced	SEC filing ↗ Oct 6, 2026	▾
06	Copeland Capital Management, LLC CIK 1541743 · View history	$44.38M 856,776 shares	1.02%	-26.03K(-2.90%)Reduced	SEC filing ↗ Oct 13, 2026	▾
07	Bank of New York Mellon Corp CIK 1390777 · View history	$23.22M 448,300 shares	0.00%	-18.21K(-3.90%)Reduced	SEC filing ↗ Nov 5, 2026	▾
08	PRINCIPAL FINANCIAL GROUP INC CIK 1126328 · View history	$21.74M 419,600 shares	0.01%	+147.20K(+54.00%)Added	SEC filing ↗ Nov 2, 2026	▾
09	Tributary Capital Management, LLC CIK 1441888 · View history	$15.24M 294,173 shares	1.39%	-37.83K(-11.40%)Reduced	SEC filing ↗ Oct 28, 2026	▾
10	M&G PLC CIK 1802539 · View history	$15.21M 292,547 shares	0.08%	+292.55KNew	SEC filing ↗ Nov 4, 2026	▾
11	ProShare Advisors LLC CIK 1357955 · View history	$12.43M 240,018 shares	0.02%	+44.35K(+22.70%)Added	SEC filing ↗ Oct 29, 2026	▾
12	WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC CIK 1644956 · View history	$10.82M 208,812 shares	0.04%	-2.17M(-91.20%)Reduced	SEC filing ↗ Nov 6, 2026	▾
13	Russell Investments Group, Ltd. CIK 1692234 · View history	$9.45M 182,362 shares	0.01%	+82.98K(+83.50%)Added	SEC filing ↗ Nov 6, 2026	▾
14	ASR Vermogensbeheer N.V. CIK 1916757 · View history	$7.10M 137,083 shares	0.07%	-219.55K(-61.60%)Reduced	SEC filing ↗ Oct 16, 2026	▾
15	RIVERBRIDGE PARTNERS LLC CIK 1112325 · View history	$7.03M 135,657 shares	0.21%	-2.88K(-2.10%)Reduced	SEC filing ↗ Nov 5, 2026	▾
16	Granite Investment Partners, LLC CIK 1542266 · View history	$6.77M 130,750 shares	0.37%	-55.67K(-29.90%)Reduced	SEC filing ↗ Nov 4, 2026	▾
17	DEUTSCHE BANK AG\ CIK 948046 · View history	$5.28M 101,838 shares	0.00%	-48.27K(-32.20%)Reduced	SEC filing ↗ Nov 6, 2026	▾
18	NICHOLAS COMPANY, INC. CIK 903949 · View history	$4.43M 85,600 shares	0.08%	0(0.00%)Unchanged	SEC filing ↗ Nov 5, 2026	▾
19	Creative Planning CIK 1540235 · View history	$3.60M 69,502 shares	0.00%	-6.80K(-8.90%)Reduced	SEC filing ↗ Nov 2, 2026	▾
20	CPC Advisors, LLC CIK 1805250 · View history	$2.73M 52,680 shares	0.37%	+52.68KNew	SEC filing ↗ Oct 21, 2026	▾

Showing 20 / 148 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

148

Cancelled or null records excluded

Disclosed shares

10,956,668

Not deduplicated across managers

Disclosed value

$567.14M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

POWER INTEGRATIONS INC · Q3 2026

Explore all 148 reporting institutions.

This page includes 20 of 148 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.