William John Sempolinski
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William John Sempolinski’s National Grid NGG Stock Holding History

William John Sempolinski’s Portfolio NGG Stock Details NGG Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q3 		$1.04M Sell
13,683
-49
-0.4% -$3.91K 0.4% 45
2026
Q2 		$1.14M Buy
13,732
+522
+4% +$44.4K 0.46% 46
2026
Q1 		$1.12M Buy
13,210
+1,140
+9% +$98.2K 0.56% 41
2025
Q4 		$934K Buy
+12,070
New +$908K 0.46% 45

Other funds holding NGG

JP Morgan Chase
JP Morgan Chase New York $1.84T AUM 33.86% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.96T AUM 27.49% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return
Natixis Advisors
Natixis Advisors Boston, Massachusetts $94.1B AUM 31.13% 1-Year Est. Return
Jones Financial Companies
Jones Financial Companies Des Peres, Missouri $273B AUM 15.34% 1-Year Est. Return
Federated Hermes
Federated Hermes Pittsburgh, Pennsylvania $71.4B AUM 33.43% 1-Year Est. Return
WCM Investment Management
WCM Investment Management Laguna Beach, California $59.1B AUM 41.96% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $73.4B AUM 32.8% 1-Year Est. Return
Raymond James Financial
Raymond James Financial St Petersburg, Florida $375B AUM 21.05% 1-Year Est. Return
BlackRock
BlackRock New York $6.79T AUM 37.06% 1-Year Est. Return

William John Sempolinski's NGG Position: Q3 2026 in Review

William John Sempolinski reduced its National Grid (NGG) stake by 0.36% in Q3 2026, selling an estimated $3.91K and leaving 13,683 shares worth $1.04M. The position accounts for 0.4% of the portfolio, ranked #45.

William John Sempolinski first reported a position in NGG in Q4 2025 and has held it in 4 quarters since. The position peaked at $1.14M in Q2 2026. 506 funds tracked by Wall St. Rank hold NGG as of Q3 2026.

  • William John Sempolinski held 13,683 shares of National Grid worth $1.04M as of Q3 2026.
  • William John Sempolinski sold 49 National Grid shares in Q3 2026, an estimated $3.91K.
  • National Grid made up 0.4% of William John Sempolinski's portfolio in Q3 2026, its #45 holding.
  • William John Sempolinski first reported a position in National Grid in Q4 2025 and has held it in 4 quarters since.
  • William John Sempolinski's National Grid position peaked at $1.14M in Q2 2026.
  • 506 funds tracked by Wall St. Rank held National Grid as of Q3 2026.

Based on William John Sempolinski's 13F filing for Q3 2026, filed 20 Oct 2026.