Company · Ownership research

NorthWestern Energy Group, Inc. NWE

CIK 0001993004 · CUSIP 668074305

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 668074305 (NWE), not CUSIP 668074905 (NWE), and does not merge CUSIPs.

This page lists the top 20 of 373 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	BlackRock, Inc. CIK 2012383 · View history	$546.08M 8,281,530 shares	0.01%	-332.12K(-3.90%)Reduced	SEC filing ↗ May 13, 2026	▾
02	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history	$230.11M 3,489,737 shares	0.01%	—	SEC filing ↗ May 8, 2026	▾
03	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$183.49M 2,782,707 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
04	STATE STREET CORP CIK 93751 · View history	$153.98M 2,335,081 shares	0.01%	-302.64K(-11.50%)Reduced	SEC filing ↗ May 15, 2026	▾
05	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$111.75M 1,694,354 shares	0.01%	+65.60K(+4.00%)Added	SEC filing ↗ May 15, 2026	▾
06	FRANKLIN RESOURCES INC CIK 38777 · View history	$106.95M 1,621,967 shares	0.03%	+185.22K(+12.90%)Added	SEC filing ↗ May 13, 2026	▾
07	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$102.73M 1,557,867 shares	0.05%	-481.76K(-23.60%)Reduced	SEC filing ↗ May 15, 2026	▾
08	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$89.08M 1,350,902 shares	0.01%	+693.67K(+105.50%)Added	SEC filing ↗ May 15, 2026	▾
09	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$86.68M 1,314,488 shares	0.06%	+393.93K(+42.80%)Added	SEC filing ↗ May 15, 2026	▾
10	NEUBERGER BERMAN GROUP LLC CIK 1465109 · View history	$84.04M 1,274,526 shares	0.06%	+14.61K(+1.20%)Added	SEC filing ↗ May 14, 2026	▾
11	SYSTEMATIC FINANCIAL MANAGEMENT LP CIK 1085936 · View history	$74.65M 1,132,065 shares	1.71%	-27.69K(-2.40%)Reduced	SEC filing ↗ May 13, 2026	▾
12	AQR Arbitrage LLC CIK 1167456 · View history	$71.34M 1,081,947 shares	1.17%	+474.92K(+78.20%)Added	SEC filing ↗ May 15, 2026	▾
13	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$67.47M 1,023,230 shares	0.01%	+5.82K(+0.60%)Added	SEC filing ↗ May 7, 2026	▾
14	River Road Asset Management, LLC CIK 1341401 · View history	$66.32M 1,005,802 shares	0.75%	-258.17K(-20.40%)Reduced	SEC filing ↗ Apr 30, 2026	▾
15	UBS Group AG CIK 1610520 · View history	$65.58M 994,528 shares	0.01%	+286.71K(+40.50%)Added	SEC filing ↗ May 5, 2026	▾
16	Balyasny Asset Management L.P. CIK 1218710 · View history	$60.04M 910,560 shares	0.12%	-95.33K(-9.50%)Reduced	SEC filing ↗ May 15, 2026	▾
17	NOMURA ASSET MANAGEMENT INTERNATIONAL INC. CIK 921739 · View history	$58.55M 887,975 shares	0.10%	-137.33K(-13.40%)Reduced	SEC filing ↗ May 15, 2026	▾
18	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$53.52M 811,675 shares	0.01%	+4.54K(+0.60%)Added	SEC filing ↗ May 15, 2026	▾
19	NORTHERN TRUST CORP CIK 73124 · View history	$53.38M 809,560 shares	0.01%	+45.15K(+5.90%)Added	SEC filing ↗ May 14, 2026	▾
20	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$52.98M 803,467 shares	0.00%	+36.75K(+4.80%)Added	SEC filing ↗ May 18, 2026	▾

Showing 20 / 373 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

373

Cancelled or null records excluded

Disclosed shares

59,777,156

Not deduplicated across managers

Disclosed value

$3.94B

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.

NorthWestern Energy Group, Inc. · Q1 2026

Explore all 373 reporting institutions.

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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.