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David Jonathan Blain Insider Profile

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David Jonathan Blain, Finance Director & Company Secretary at OptiBiotix Health, holds 243.02K shares in OptiBiotix Health (Ticker: GB:OPTI), holds 57.77K shares in Applied Graphene Materials (Ticker: GB:AGM), holds 153.59K shares in Nanoco Group plc (Ticker: GB:NANO). Most recently, David Jonathan Blain Bought ― shares of OptiBiotix Health on May 29, 2026 for an estimated value of 9.81K .
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David Jonathan Blain

David Jonathan Blain
OptiBiotix Health (OPTI)
Finance Director & Company Secretary

Ranked #68,018 out of 109,193 Corporate Insiders

Profitable Transactions

20%
1 out of 5 Profitable Transactions

Average Return

-6.90%
Average return per transaction
Time Frame
1 Year
Compare to
No Benchmark
How are Insiders Ranked?

Insider Holdings

£18K
77.68%
22.32%
A breakdown of David Jonathan Blain's holdings
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Insider Roles

OptiBiotix Health
(OPTI)
Finance Director & Company Secretary
Nanoco Group plc
(NANO)
Chief Financial Officer
Roles that David Jonathan Blain holds in companies
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Most Profitable Insider Trade

Stock:
Nanoco Group plc
(NANO)
Rating:Informative Buy
Date:Nov 15, 2017 - Nov 15, 2018
Return:+84.30%
The most profitable trade made by David Jonathan Blain
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David Jonathan Blain's Trading History

Company Name
Last Transaction Date
Insider Position
Last Transaction
Last Transaction Amount
Holding Value
OPTI
OptiBiotix Health
May 29, 2026
Finance Director & Company Secretary
Informative Buy
9.81K
£14.22K
NANO
Nanoco Group plc
Nov 15, 2017
Chief Financial Officer
Informative Buy
25.00K
£4.09K
AGM
Applied Graphene Materials
Jan 27, 2021
―
Informative Buy
10.00K
£577.70
EGS
EG Solutions
―
―
―
£7.38K
List of latest transactions for each holding click on a transaction to see David Jonathan Blain's performance on stock
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David Jonathan Blain insider profile FAQ

What is the percentage of profitable transactions made by David Jonathan Blain?
The percentage of profitable transactions made by David Jonathan Blain is 20%.
    What is the average return per transaction made by David Jonathan Blain?
    The average return per transaction made by David Jonathan Blain is -6.90%.
      What stocks does David Jonathan Blain hold?
      David Jonathan Blain holds: GB:OPTI, GB:NANO, GB:AGM, GB:EGS stocks.
        What was David Jonathan Blain’s latest transaction?
        David Jonathan Blain latest transaction was an Informative Buy of 9.81K .
          What was David Jonathan Blain's most profitable transaction?
          David Jonathan Blain’s most profitable transaction was an Informative Buy of GB:NANO stock on November 15, 2017. The return on the trade was 84.30%.
            What is David Jonathan Blain's role in OptiBiotix Health?
            David Jonathan Blain's role in OptiBiotix Health is Finance Director & Company Secretary.
              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.