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Geoffrey Ribar Insider Profile

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Geoffrey Ribar, Director at QuantumScape, holds 60.28K shares in QuantumScape (Ticker: QS), holds 97.92K shares in Everspin Technologies (Ticker: MRAM), holds 12.56K shares in MACOM Technology Solutions Holdings (Ticker: MTSI).
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Geoffrey Ribar

Geoffrey Ribar
QuantumScape (QS)
Director

Ranked #85,670 out of 108,921 Corporate Insiders

Profitable Transactions

33%
3 out of 9 Profitable Transactions

Average Return

-14.30%
Average return per transaction
Time Frame
1 Year
Compare to
No Benchmark
How are Insiders Ranked?

Insider Holdings

$55M
89.69%
6.11%
2.90%
0.70%
0.60% Others
A breakdown of Geoffrey Ribar's holdings
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Insider Roles

Cadence Design
(CDNS)
Sr. VP, CFO
MACOM Technology Solutions Holdings
(MTSI)
Director
Everspin Technologies
(MRAM)
Director
Acacia Research
(ACTG)
Director
+1 other positions
Roles that Geoffrey Ribar holds in companies
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Most Profitable Insider Trade

Stock:
Everspin Technologies
(MRAM)
Rating:Informative Sell
Date:May 21, 2026 - Today
Return:+49.50%
The most profitable trade made by Geoffrey Ribar
See the Latest Stocks Traded by Insiders

Geoffrey Ribar's Trading History

Company Name
Last Transaction Date
Insider Position
Last Transaction
Last Transaction Amount
Holding Value
QS
QuantumScape
Jun 05, 2026
Director
Uninformative Buy
―
$330.36K
CDNS
Cadence Design
Aug 30, 2017
Sr. VP, CFO
Uninformative Buy
207.15K
$49.59M
MTSI
MACOM Technology Solutions Holdings
May 13, 2026
Director
Informative Sell
587.27K
$3.38M
AQ
Aquantia Corp
Jun 21, 2019
―
Uninformative Buy
―
$173.74K
MRAM
Everspin Technologies
May 22, 2026
Director
Uninformative Buy
―
$1.60M
ACTG
Acacia Research
Jun 03, 2025
Director
Uninformative Buy
―
$389.65K
List of latest transactions for each holding click on a transaction to see Geoffrey Ribar's performance on stock
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Geoffrey Ribar insider profile FAQ

What is the percentage of profitable transactions made by Geoffrey Ribar?
The percentage of profitable transactions made by Geoffrey Ribar is 33%.
    What is the average return per transaction made by Geoffrey Ribar?
    The average return per transaction made by Geoffrey Ribar is -14.30%.
      What stocks does Geoffrey Ribar hold?
      Geoffrey Ribar holds: QS, CDNS, MTSI, AQ, MRAM, ACTG stocks.
        What was Geoffrey Ribar’s latest transaction?
        Geoffrey Ribar latest transaction was an Uninformative Buy of ―.
          What was Geoffrey Ribar's most profitable transaction?
          Geoffrey Ribar’s most profitable transaction was an Informative Sell of MRAM stock on May 21, 2026. The return on the trade was 49.50%.
            What is Geoffrey Ribar's role in QuantumScape?
            Geoffrey Ribar's role in QuantumScape 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.