William Blair Investment Management
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William Blair Investment Management’s NorthWestern Energy NWE Stock Holding History

William Blair Investment Management’s Portfolio NWE Stock Details NWE Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$24.1M Sell
336,472
-90,008
-21% -$6.38M 0.07% 225
2026
Q1 		$28.1M Buy
426,480
+13,152
+3% +$890K 0.09% 199
2025
Q4 		$26.7M Sell
413,328
-42,892
-9% -$2.72M 0.07% 225
2025
Q3 		$26.7M Sell
456,220
-27,654
-6% -$1.53M 0.07% 244
2025
Q2 		$24.8M Sell
483,874
-40,404
-8% -$2.23M 0.07% 259
2025
Q1 		$30.3M Sell
524,278
-27,774
-5% -$1.51M 0.09% 217
2024
Q4 		$29.5M Buy
552,052
+13,352
+2% +$726K 0.07% 255
2024
Q3 		$30.8M Sell
538,700
-16,341
-3% -$873K 0.08% 230
2024
Q2 		$27.8M Sell
555,041
-1,032
-0.2% -$52.1K 0.07% 239
2024
Q1 		$28.3M Sell
556,073
-275
-0% -$13.4K 0.07% 255
2023
Q4 		$28.3M Sell
556,348
-10,684
-2% -$533K 0.08% 238
2023
Q3 		$27.3M Sell
567,032
-41,546
-7% -$2.21M 0.09% 233
2023
Q2 		$34.5M Buy
608,578
+11,311
+2% +$661K 0.11% 201
2023
Q1 		$34.6M Buy
597,267
+2,183
+0.4% +$125K 0.12% 182
2022
Q4 		$35.3M Sell
595,084
-22,926
-4% -$1.25M 0.14% 157
2022
Q3 		$30.5M Sell
618,010
-12,472
-2% -$685K 0.12% 189
2022
Q2 		$37.2M Buy
630,482
+43,855
+7% +$2.61M 0.14% 165
2022
Q1 		$35.5M Sell
586,627
-7,473
-1% -$437K 0.11% 212
2021
Q4 		$34M Sell
594,100
-47,343
-7% -$2.69M 0.09% 240
2021
Q3 		$36.8M Buy
641,443
+640,128
+48,679% +$39.8M 0.1% 233
2021
Q2 		$79K Buy
+1,315
New +$85.6K ﹤0.01% 422

Other funds holding NWE

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $462B AUM 39.16% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return
Balyasny Asset Management
Balyasny Asset Management Chicago, Illinois $80.2B AUM 51.53% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
SFM
Systematic Financial Management Teaneck, New Jersey $5.02B AUM 66.06% 1-Year Est. Return

William Blair Investment Management's NWE Position: Q2 2026 in Review

William Blair Investment Management reduced its NorthWestern Energy (NWE) stake by 21% in Q2 2026, selling an estimated $6.38M and leaving 336,472 shares worth $24.1M. The position accounts for 0.07% of the portfolio, ranked #225.

William Blair Investment Management first reported a position in NWE in Q2 2021 and has held it in 21 quarters since. The position peaked at $37.2M in Q2 2022. 375 funds tracked by Wall St. Rank hold NWE as of Q2 2026.

  • William Blair Investment Management held 336,472 shares of NorthWestern Energy worth $24.1M as of Q2 2026.
  • William Blair Investment Management sold 90,008 NorthWestern Energy shares in Q2 2026, an estimated $6.38M.
  • NorthWestern Energy made up 0.07% of William Blair Investment Management's portfolio in Q2 2026, its #225 holding.
  • William Blair Investment Management first reported a position in NorthWestern Energy in Q2 2021 and has held it in 21 quarters since.
  • William Blair Investment Management's NorthWestern Energy position peaked at $37.2M in Q2 2022.
  • 375 funds tracked by Wall St. Rank held NorthWestern Energy as of Q2 2026.

Based on William Blair Investment Management's 13F filing for Q2 2026, filed 12 Aug 2026.