William Blair & Company
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William Blair & Company’s Constellation Energy CEG Stock Holding History

William Blair & Company’s Portfolio CEG Stock Details CEG Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$20.6M Buy
82,871
+4,946
+6% +$1.39M 0.05% 253
2026
Q1 		$21.8M Buy
77,925
+13,222
+20% +$4.02M 0.06% 233
2025
Q4 		$22.9M Buy
64,703
+3,103
+5% +$1.13M 0.06% 221
2025
Q3 		$20.3M Buy
61,600
+8,433
+16% +$2.72M 0.05% 230
2025
Q2 		$17.2M Buy
53,167
+3,728
+8% +$987K 0.05% 253
2025
Q1 		$9.97M Buy
49,439
+6,543
+15% +$1.75M 0.03% 329
2024
Q4 		$9.6M Buy
42,896
+4,012
+10% +$1M 0.03% 348
2024
Q3 		$10.1M Buy
38,884
+12,893
+50% +$2.56M 0.03% 342
2024
Q2 		$5.21M Buy
25,991
+5,484
+27% +$1.12M 0.02% 479
2024
Q1 		$3.79M Buy
20,507
+843
+4% +$120K 0.01% 533
2023
Q4 		$2.3M Buy
19,664
+3,944
+25% +$460K 0.01% 648
2023
Q3 		$1.71M Sell
15,720
-38
-0.2% -$3.92K 0.01% 696
2023
Q2 		$1.44M Buy
15,758
+2,545
+19% +$211K 0.01% 736
2023
Q1 		$1.04M Buy
13,213
+2,811
+27% +$227K ﹤0.01% 825
2022
Q4 		$897K Buy
10,402
+162
+2% +$14.6K ﹤0.01% 855
2022
Q3 		$852K Buy
10,240
+2,089
+26% +$154K ﹤0.01% 869
2022
Q2 		$467K Sell
8,151
-13
-0.2% -$782 ﹤0.01% 1090
2022
Q1 		$459K Buy
+8,164
New +$398K ﹤0.01% 1186

Other funds holding CEG

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
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
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
EC
ECP ControlCo Summit, New Jersey $4.67B AUM 13.65% 1-Year Est. Return
Capital International Investors
Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

William Blair & Company's CEG Position: Q2 2026 in Review

William Blair & Company increased its Constellation Energy (CEG) stake by 6.3% in Q2 2026, buying an estimated $1.39M and bringing the position to 82,871 shares worth $20.6M. The position accounts for 0.05% of the portfolio, ranked #253.

William Blair & Company first reported a position in CEG in Q1 2022 and has held it in 18 quarters since. The position peaked at $22.9M in Q4 2025. 1,861 funds tracked by Wall St. Rank hold CEG as of Q2 2026.

  • William Blair & Company held 82,871 shares of Constellation Energy worth $20.6M as of Q2 2026.
  • William Blair & Company bought 4,946 Constellation Energy shares in Q2 2026, an estimated $1.39M.
  • Constellation Energy made up 0.05% of William Blair & Company's portfolio in Q2 2026, its #253 holding.
  • William Blair & Company first reported a position in Constellation Energy in Q1 2022 and has held it in 18 quarters since.
  • William Blair & Company's Constellation Energy position peaked at $22.9M in Q4 2025.
  • 1,861 funds tracked by Wall St. Rank held Constellation Energy as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.