William Blair Investment Management
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William Blair Investment Management’s NiSource NI Stock Holding History

William Blair Investment Management’s Portfolio NI Stock Details NI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$508K Buy
10,686
+48
+0.5% +$2.27K ﹤0.01% 368
2026
Q1 		$496K Buy
10,638
+270
+3% +$12.2K ﹤0.01% 375
2025
Q4 		$433K Sell
10,368
-929
-8% -$39.7K ﹤0.01% 380
2025
Q3 		$489K Sell
11,297
-373
-3% -$15.4K ﹤0.01% 369
2025
Q2 		$471K Sell
11,670
-194
-2% -$7.61K ﹤0.01% 380
2025
Q1 		$476K Sell
11,864
-1,338
-10% -$51.5K ﹤0.01% 378
2024
Q4 		$485K Sell
13,202
-530
-4% -$19K ﹤0.01% 388
2024
Q3 		$476K Sell
13,732
-1,168
-8% -$37.3K ﹤0.01% 374
2024
Q2 		$429K Hold
14,900
– – ﹤0.01% 382
2024
Q1 		$412K Buy
+14,900
New +$392K ﹤0.01% 378
2018
Q3 		– Sell
-33,667
Closed -$885K – 468
2018
Q2 		$885K Sell
33,667
-17,975
-35% -$441K ﹤0.01% 411
2018
Q1 		$1.24M Buy
51,642
+6,768
+15% +$160K ﹤0.01% 406
2017
Q4 		$1.15M Buy
44,874
+10,752
+32% +$285K ﹤0.01% 401
2017
Q3 		$873K Buy
34,122
+2,373
+7% +$62.4K ﹤0.01% 410
2017
Q2 		$805K Buy
+31,749
New +$791K ﹤0.01% 424

Other funds holding NI

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Deutsche Bank
Deutsche Bank Frankfurt Am Main Ge, Germany $344B AUM 42.99% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Jennison Associates
Jennison Associates New York $167B AUM 44.17% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

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

William Blair Investment Management increased its NiSource (NI) stake by 0.45% in Q2 2026, buying an estimated $2.27K and bringing the position to 10,686 shares worth $508K. The position accounts for ﹤0.01% of the portfolio, ranked #368.

William Blair Investment Management first reported a position in NI in Q2 2017 and has held it in 15 quarters since. The position peaked at $1.24M in Q1 2018. 913 funds tracked by Wall St. Rank hold NI as of Q2 2026.

  • William Blair Investment Management held 10,686 shares of NiSource worth $508K as of Q2 2026.
  • William Blair Investment Management bought 48 NiSource shares in Q2 2026, an estimated $2.27K.
  • NiSource made up ﹤0.01% of William Blair Investment Management's portfolio in Q2 2026, its #368 holding.
  • William Blair Investment Management first reported a position in NiSource in Q2 2017 and has held it in 15 quarters since.
  • William Blair Investment Management's NiSource position peaked at $1.24M in Q1 2018.
  • 913 funds tracked by Wall St. Rank held NiSource as of Q2 2026.

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