AMPX
−$765.2K
40,000 sh @ $19
AMPX
Amprius Technologies, Inc.
SEC CIK 1899287
$16.31
+31.5% · 90 days
90-day buys
$0
0 open-market
90-day sells
$31.87M
14 open-market
Net insider flow
−$31.87M
Net selling
Filings shown
68
Most recent
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At a glance
Over the last 90 days, insiders at AMPX have sold a net $31.87M of stock (0 open-market buys vs 14 sells).
Largest recent trade: Sun Kang sold $19.68M of AMPX, trimming their stake 44%.
Most active filer: Stefan Constantin Ionel, with 29 transactions among the recent filings shown.
Insider transaction history
Form 4 filings for AMPX, newest firstAMPX
+$0
36,914 sh
AMPX
−$41.9K
2,000 sh @ $21
AMPX
−$6.1K
356 sh @ $17
AMPX
−$75.2K
4,375 sh @ $17
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AMPX
−$55.2K
3,208 sh @ $17
AMPX
−$320.3K
17,895 sh @ $18
AMPX
−$320.3K
17,895 sh @ $18
AMPX
−$1M
67,796 sh @ $15
AMPX
−$426.1K
28,812 sh @ $15
AMPX
−$897.7K
60,702 sh @ $15
AMPX
+$0
6,250 sh
AMPX
+$2.34M
1.31M sh @ $2
AMPX
+$690K
187,495 sh @ $4
AMPX
−$19.68M
1.25M sh @ $16
AMPX
−$4.18M
249,037 sh @ $17
AMPX
−$2.86M
152,823 sh @ $19
AMPX
−$1.24M
65,046 sh @ $19
AMPX
+$705.4K
270,251 sh @ $3
AMPX
−$5.24M
282,500 sh @ $19
AMPX
−$2.38M
130,646 sh @ $18
AMPX
+$224.8K
86,143 sh @ $3
AMPX
+$43K
69,422 sh @ $1
AMPX
−$1.86M
100,000 sh @ $19
AMPX
−$910.7K
50,000 sh @ $18
AMPX
−$103.1K
5,565 sh @ $19
AMPX
+$64.6K
104,132 sh @ $1
AMPX
−$2.99M
166,632 sh @ $18
AMPX
+$0
150,000 sh
AMPX
+$0
150,000 sh
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About AMPX insider activity
This page tracks every recent Form 4 filed for Amprius Technologies, Inc. with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.
The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.
Frequently asked questions
What are the latest AMPX insider transactions?
The most recent Form 4 filings for AMPX are listed at the top of this page, newest first, usually within minutes of SEC acceptance. Each row shows the insider, transaction code, share count, and dollar value.
Are AMPX insiders buying?
The summary above shows AMPX open-market purchases (SEC code P) over the trailing 90 days, netted against sales. Green net flow means insiders bought more than they sold. Each buy is linked to its original Form 4.
How often is AMPX insider data updated?
Continuously. We read from SEC EDGAR, so new Form 4 filings for Amprius Technologies, Inc. usually appear here within minutes of being accepted by the SEC.
What does "net insider flow" mean?
It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.
Why do some rows show grants or option exercises instead of buys?
Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.
Is this investment advice?
No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.