Institutional shares held 54.7 Million
3.87M calls
764K puts
Total value of holdings $618M
$43.7M calls
$8.63M puts
Market Cap $1.24B
109,831,000 Shares Out.
Institutional ownership 49.81%
# of Institutions 201


Latest Institutional Activity in AMPX

Top Purchases

Q3 2025
Driehaus Capital Management LLC Shares Held: 3.09M ($34.9M)
Q3 2025
Citadel Advisors LLC Shares Held: 2.51M ($28.3M)
Q3 2025
Deutsche Bank Ag\ Shares Held: 2.07M ($23.3M)
Q3 2025
Voloridge Investment Management, LLC Shares Held: 1.88M ($21.2M)
Q3 2025
Vanguard Group Inc Shares Held: 6.51M ($73.5M)

Top Sells

Q3 2025
Millennium Management LLC Shares Held: 588K ($6.64M)
Q3 2025
Renaissance Technologies LLC Shares Held: 12.4K ($140K)
Q3 2025
Marshall Wace, LLP Shares Held: 30.4K ($343K)
Q3 2025
Essex Investment Management CO LLC Shares Held: 697K ($7.87M)
Q3 2025
Price T Rowe Associates Inc Shares Held: 49.1K ($555K)

About AMPX


Insider Transactions at AMPX

Insider Transaction List

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Date Insider Transaction Ownership Type Shares Traded Value / Price
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Last 12 Months Summary

Buy / Acquisition
0 Shares
From 0 Insiders
Sell / Disposition
0 Shares
From 0 Insiders

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