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NGG · National Grid PLC

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$79.35 -0.08 (-0.10%) At close · Aug 28
Market Cap
$79.78B
Shares
1.01B

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 618
Total Value: $5,477,352,836
Total Shares: 66,144,058
Showing 1–100 of 634 holdings by value · page 1 of 7

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 618 13F filers · Δ vs Mar 31, 2026
Top Holder
7.3%
Sep 2023 → Jun 2026 · range 7.3% – 11.1%
−1.9 pts
Top 5
29.2%
Sep 2023 → Jun 2026 · range 29.0% – 39.1%
+0.2 pts
Top 10
46.1%
Sep 2023 → Jun 2026 · range 46.1% – 58.9%
+0.0 pts
HHI
306
Sep 2023 → Jun 2026 · range 306 – 445
Broadly held−11

Quarterly Activity

vs Mar 31, 2026
New
77
Increased
278
Decreased
160
Sold Out
53
Unchanged
103
Holder count: +24
Institutional value: +4.5%
Shares held: +6.8%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 634
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1004315 CUSIP 636274409 13F (30d) 412 filings 387 filers Visit website