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Iain James Mackay Insider Profile

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Iain James Mackay, Director at National Grid, holds 4.50K shares in National Grid (Ticker: GB:NG), holds 317.36K shares in GlaxoSmithKline (Ticker: GB:GSK), holds 2.30M shares in HSBC Holdings (Ticker: GB:HSBA). Most recently, Iain James Mackay Bought ― shares of National Grid on Nov 18, 2025 for an estimated value of 52.81K .
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Iain James Mackay

Iain James Mackay
National Grid (NG)
Director

Ranked #70,107 out of 109,349 Corporate Insiders

Profitable Transactions

62%
13 out of 21 Profitable Transactions

Average Return

-3.80%
Average return per transaction
Time Frame
1 Year
Compare to
No Benchmark
How are Insiders Ranked?

Insider Holdings

£35M
83.19%
16.65%
0.16%
A breakdown of Iain James Mackay's holdings
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Insider Roles

HSBC Holdings
(HSBA)
Finance Director
GlaxoSmithKline
(GSK)
Chief Financial Officer
National Grid
(NG)
Director
Roles that Iain James Mackay holds in companies
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Most Profitable Insider Trade

Stock:
HSBC Holdings
(HSBA)
Rating:Informative Sell
Date:Sep 25, 2014 - Sep 25, 2015
Return:+17.60%
The most profitable trade made by Iain James Mackay
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Iain James Mackay's Trading History

Company Name
Last Transaction Date
Insider Position
Last Transaction
Last Transaction Amount
Holding Value
NG
National Grid
Nov 18, 2025
Director
Informative Buy
52.81K
£56.45K
HSBA
HSBC Holdings
Dec 06, 2018
Finance Director
Informative Sell
482.50K
£29.40M
GSK
GlaxoSmithKline
Apr 26, 2023
Chief Financial Officer
Uninformative Buy
64.81K
£5.89M
List of latest transactions for each holding click on a transaction to see Iain James Mackay's performance on stock
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Iain James Mackay insider profile FAQ

What is the percentage of profitable transactions made by Iain James Mackay?
The percentage of profitable transactions made by Iain James Mackay is 62%.
    What is the average return per transaction made by Iain James Mackay?
    The average return per transaction made by Iain James Mackay is -3.80%.
      What stocks does Iain James Mackay hold?
      Iain James Mackay holds: GB:NG, GB:HSBA, GB:GSK stocks.
        What was Iain James Mackay’s latest transaction?
        Iain James Mackay latest transaction was an Informative Buy of 52.81K .
          What was Iain James Mackay's most profitable transaction?
          Iain James Mackay’s most profitable transaction was an Informative Sell of GB:HSBA stock on September 25, 2014. The return on the trade was 17.60%.
            What is Iain James Mackay's role in National Grid?
            Iain James Mackay's role in National Grid is Director.
              How can I follow the stock ratings of top corporate insiders?
              Head over to our Expert Center to see a list of the Top 100 corporate insiders and follow the corporate insiders of your choice. Visit their profiles for more details about their stock transactions and see how they perform on a stock-by-stock basis.