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John Grampa Insider Profile

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John Grampa, Sr. VP Finance and CFO at Materion, holds 14.42K shares in Park-Ohio Holdings (Ticker: PKOH), holds 38.63K shares in Materion (Ticker: MTRN). Most recently, John Grampa Sold ― shares of Park-Ohio Holdings on Jun 23, 2026 for an estimated value of $175.50K.
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John Grampa

John Grampa
Materion (MTRN)
Sr. VP Finance and CFO

Ranked #13,049 out of 107,986 Corporate Insiders

Profitable Transactions

60%
3 out of 5 Profitable Transactions

Average Return

+34.40%
Average return per transaction
Time Frame
1 Year
Compare to
No Benchmark
How are Insiders Ranked?

Insider Holdings

$12M
95.16%
4.84%
A breakdown of John Grampa's holdings
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Insider Roles

Materion
(MTRN)
Sr. VP Finance and CFO
Park-Ohio Holdings
(PKOH)
Director
Roles that John Grampa holds in companies
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Most Profitable Insider Trade

Stock:
Park-Ohio Holdings
(PKOH)
Rating:Informative Buy
Date:Mar 19, 2020 - Mar 19, 2021
Return:+155.40%
The most profitable trade made by John Grampa
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John Grampa's Trading History

Company Name
Last Transaction Date
Insider Position
Last Transaction
Last Transaction Amount
Holding Value
MTRN
Materion
Nov 21, 2014
Sr. VP Finance and CFO
Uninformative Buy
830.20
$11.09M
PKOH
Park-Ohio Holdings
Jun 23, 2026
Director
Informative Sell
175.50K
$563.32K
List of latest transactions for each holding click on a transaction to see John Grampa's performance on stock
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John Grampa insider profile FAQ

What is the percentage of profitable transactions made by John Grampa?
The percentage of profitable transactions made by John Grampa is 60%.
    What is the average return per transaction made by John Grampa?
    The average return per transaction made by John Grampa is 34.40%.
      What stocks does John Grampa hold?
      John Grampa holds: MTRN, PKOH stocks.
        What was John Grampa’s latest transaction?
        John Grampa latest transaction was an Informative Sell of $175.50K.
          What was John Grampa's most profitable transaction?
          John Grampa’s most profitable transaction was an Informative Buy of PKOH stock on March 19, 2020. The return on the trade was 155.40%.
            What is John Grampa's role in Materion?
            John Grampa's role in Materion is Sr. VP Finance and CFO.
              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.