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NWE · NorthWestern Energy Group, Inc. · Holdings

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Market Cap
$4.34B
Shares
61.52M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 376
Total Value: $4,217,574,131
Total Shares: 58,888,232
Showing 1–100 of 378 holdings by value · page 1 of 4

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 376 13F filers · Δ vs Mar 31, 2026
Top Holder
15.4%
Sep 2023 → Jun 2026 · range 13.9% – 18.4%
+1.6 pts
Top 5
33.3%
Sep 2023 → Jun 2026 · range 31.1% – 43.4%
+2.3 pts
Top 10
44.5%
Sep 2023 → Jun 2026 · range 43.0% – 55.3%
+1.5 pts
HHI
401
Sep 2023 → Jun 2026 · range 352 – 594
Broadly held+49

Quarterly Activity

vs Mar 31, 2026
New
38
Increased
129
Decreased
135
Sold Out
35
Unchanged
74
Holder count: +3
Institutional value: +7.0%
Shares held: -1.5%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 378
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1993004 CUSIP 668074305 13F (30d) 209 filings 207 filers Visit website Investor relations