Holding(s) in Company

RNS Number : 7287G

National Grid PLC

31 May 2017

National Grid plc (National Grid)

Notification of Major Interest in National Grid Ordinary Shares

National Grid has received a notification on Form TR-1 from BlackRock, Inc. that its total interest in National Grid voting ordinary shares is as shown below.

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached: ⁱⁱ

National Grid plc

2 Reason for the notification (please tick the appropriate box or boxes):
An acquisition or disposal of voting rights		X
An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached
An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments
An event changing the breakdown of voting rights
Other (please specify):

3. Full name of person(s) subject to the notification obligation: ⁱⁱⁱ	BlackRock, Inc.
4. Full name of shareholder(s) (if different from 3.): ^iv
5. Date of the transaction and date on which the threshold is crossed or reached: ^v	30 May, 2017
6. Date on which issuer notified:	31 May, 2017
7. Threshold(s) that is/are crossed or reached: ^{vi, vii}	Voting rights attached to shares holding for BlackRock, Inc. has gone below 5%

8. Notified details:
A: Voting rights attached to shares ^{viii, ix}
Class/type of shares if possible using the ISIN CODE	Situation previous to the triggering transaction		Resulting situation after the triggering transaction
	Number of Shares	Number of Voting Rights	Number of shares	Number of voting rights		% of voting rights ^x
			Direct	Direct ^xi	Indirect ^xii	Direct	Indirect
GB00BDR05C01	220,427,008	220,427,008	N/A	N/A	126,289,417	N/A	3.66%

B: Qualifying Financial Instruments
Resulting situation after the triggering transaction
Type of financial instrument	Expiration date ^xiii	Exercise/ Conversion Period ^xiv	Number of voting rights that may be acquired if the instrument is exercised/ converted.	% of voting rights
Securities Lending			88,875,304	2.58%

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments ^{xv, xvi}
Resulting situation after the triggering transaction
Type of financial instrument	Exercise price	Expiration date ^xvii	Exercise/ Conversion period ^xviii	Number of voting rights instrument refers to	% of voting rights ^{xix, xx}
CFD				1,034,400	Nominal	Delta
					0.03%	0.03%

Total (A+B+C)
Number of voting rights	Percentage of voting rights
216,199,121	6.28%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: ^xxi
Name	% of voting rights if it equals or is higher than the notifiable threshold	% of voting rights through financial instruments if it equals or is higher than the notifiable threshold	Total of both if it equals or is higher than the notifiable threshold
BlackRock, Inc.
BlackRock Holdco 2, Inc.
BlackRock Financial Management, Inc.
BlackRock International Holdings, Inc.
BR Jersey International Holdings L.P.
BlackRock Group Limited
BlackRock International Limited

BlackRock, Inc.
BlackRock Holdco 2, Inc.
BlackRock Financial Management, Inc.
BlackRock Capital Holdings, Inc.
BlackRock Advisors, LLC

BlackRock, Inc.
BlackRock Holdco 2, Inc.
BlackRock Financial Management, Inc.
BlackRock International Holdings, Inc.
BR Jersey International Holdings L.P.
BlackRock Group Limited
BlackRock Investment Management (UK) Limited
BlackRock Asset Management Deutschland AG

BlackRock, Inc.
BlackRock Holdco 2, Inc.
BlackRock Financial Management, Inc.
BlackRock Holdco 4, LLC
BlackRock Holdco 6, LLC
BlackRock Delaware Holdings Inc.
BlackRock Fund Advisors
BlackRock Institutional Trust Company, National Association

BlackRock, Inc.
BlackRock Holdco 2, Inc.
BlackRock Financial Management, Inc.
BlackRock International Holdings, Inc.
BR Jersey International Holdings L.P.
BlackRock Group Limited
BlackRock Advisors (UK) Limited

BlackRock, Inc.
Trident Merger, LLC
BlackRock Investment Management, LLC

BlackRock, Inc.
BlackRock Holdco 2, Inc.
BlackRock Financial Management, Inc.
BlackRock International Holdings, Inc.
BR Jersey International Holdings L.P.
BlackRock Group Limited
BlackRock Investment Management (UK) Limited

BlackRock, Inc.
BlackRock Holdco 2, Inc.
BlackRock Financial Management, Inc.
BlackRock International Holdings, Inc.
BR Jersey International Holdings L.P.
BlackRock Holdco 3, LLC
BlackRock Canada Holdings LP
BlackRock Canada Holdings ULC
BlackRock Asset Management Canada Limited

BlackRock, Inc.
BlackRock Holdco 2, Inc.
BlackRock Financial Management, Inc.
BlackRock Holdco 4, LLC
BlackRock Holdco 6, LLC
BlackRock Delaware Holdings Inc.
BlackRock Fund Advisors

BlackRock, Inc.
BlackRock Holdco 2, Inc.
BlackRock Financial Management, Inc.
BlackRock International Holdings, Inc.
BR Jersey International Holdings L.P.
BlackRock Australia Holdco Pty. Ltd.
BlackRock Investment Management (Australia) Limited

BlackRock, Inc.
BlackRock Holdco 2, Inc.
BlackRock Financial Management, Inc.

BlackRock, Inc.
BlackRock Holdco 2, Inc.
BlackRock Financial Management, Inc.
BlackRock International Holdings, Inc.
BR Jersey International Holdings L.P.
BlackRock (Singapore) Holdco Pte. Ltd.
BlackRock Asia-Pac Holdco, LLC
BlackRock HK Holdco Limited
BlackRock Asset Management North Asia Limited

BlackRock, Inc.
BlackRock Holdco 2, Inc.
BlackRock Financial Management, Inc.
BlackRock International Holdings, Inc.
BR Jersey International Holdings L.P.
BlackRock (Singapore) Holdco Pte. Ltd.
BlackRock Asia-Pac Holdco, LLC
BlackRock HK Holdco Limited
BlackRock Cayco Limited
BlackRock Trident Holding Company Limited
BlackRock Japan Holdings GK
BlackRock Japan Co., Ltd.

BlackRock, Inc.
BlackRock Holdco 2, Inc.
BlackRock Financial Management, Inc.
BlackRock International Holdings, Inc.
BR Jersey International Holdings L.P.
BlackRock (Singapore) Holdco Pte. Ltd.
BlackRock (Singapore) Limited

BlackRock, Inc.
BlackRock Holdco 2, Inc.
BlackRock Financial Management, Inc.
BlackRock International Holdings, Inc.
BR Jersey International Holdings L.P.
BlackRock Group Limited
BlackRock (Netherlands) B.V.

Proxy Voting:
10. Name of the proxy holder:	N/A
11. Number of voting rights proxy holder will cease to hold:	N/A
12. Date on which proxy holder will cease to hold voting rights:	N/A