MCM
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Mattern Capital Management’s Constellation Energy CEG Stock Holding History

Mattern Capital Management’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
Q1 		$10.4M Buy
37,107
+13,476
+57% +$4.1M 1.24% 23
2025
Q4 		$8.35M Buy
23,631
+829
+4% +$301K 0.99% 59
2025
Q3 		$7.5M Buy
+22,802
New +$7.36M 0.88% 67

Other funds holding CEG

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
EC
ECP ControlCo Summit, New Jersey $6.34B AUM 19.72% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Capital International Investors
Capital International Investors Los Angeles, California $427B AUM 29.17% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Canada Pension Plan Investment Board
Canada Pension Plan Investment Board Toronto Ontario, Ontario, Canada $155B AUM 29.93% 1-Year Est. Return

Mattern Capital Management's CEG Position: Q1 2026 in Review

Mattern Capital Management increased its Constellation Energy (CEG) stake by 57% in Q1 2026, buying an estimated $4.1M and bringing the position to 37,107 shares worth $10.4M. The position accounts for 1.24% of the portfolio, ranked #23.

Mattern Capital Management first reported a position in CEG in Q3 2025 and has held it in 3 quarters since. 1,893 funds tracked by Wall St. Rank hold CEG as of Q1 2026.

  • Mattern Capital Management held 37,107 shares of Constellation Energy worth $10.4M as of Q1 2026.
  • Mattern Capital Management bought 13,476 Constellation Energy shares in Q1 2026, an estimated $4.1M.
  • Constellation Energy made up 1.24% of Mattern Capital Management's portfolio in Q1 2026, its #23 holding.
  • Mattern Capital Management first reported a position in Constellation Energy in Q3 2025 and has held it in 3 quarters since.
  • 1,893 funds tracked by Wall St. Rank held Constellation Energy as of Q1 2026.

Based on Mattern Capital Management's 13F filing for Q1 2026, filed 4 May 2026.