Skip to content
sellModerate cluster of 4

Thomas M Stepien sold $42k of AMPX

Chief Executive Officer at Amprius Technologies, Inc.. 2,000 shares at an average of $20.97, traded Jun 4, 2026, filed Jun 5, 2026.

Warning score
46
Value
$42k
2,000 shares
Holdings after
625,625
-0% from before
From 52-week low
+757%
low $2.63, close $22.54
From 52-week high
-2%
high $22.91, as of Jun 4, 2026

Score components

  • Role
    CEO
    +25
  • Trade size
    $42k at market
    +6
  • Share of holdings sold
    Sold 0.3% of holdings
    0
  • Cluster
    4 insiders selling within 14 days
    +15

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

AMPXOct 9, 2026 · close 9.44
Since filing Jun 5, 2026: -52.1%SPY +6.0% · excess -58.1%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0002067233-26-000015, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Jun 4, 2026GGift
Common stock
-30,384$0.00$0664,539Jun 5, 2026
Jun 4, 2026GGift
Common stock
-36,914$0.00$0627,625Jun 5, 2026
Jun 4, 2026GGift
Common stockindirect: See Footnote
+36,914$0.00$036,914Jun 5, 2026
Jun 4, 2026SOpen-market sale
Common stock
-2,000$20.97$42k625,625Jun 5, 2026

Related signals

Other insiders at Amprius Technologies, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
50Moderate
AMPXsell 3
Amprius Technologies, Inc.
Kang Sun
See Remarks
$642k
62,101 shares
-5%
44Moderate
AMPXsell 3
Amprius Technologies, Inc.
Constantin Ionel Stefan
Chief Technology Officer
$307k
29,681 shares
-4%
54Moderate
AMPXsell 3
Amprius Technologies, Inc.
Thomas M Stepien
Chief Executive Officer
$324k
31,529 shares
-5%
53Moderate
AMPXsell 2
Amprius Technologies, Inc.
Donald R Dixon
director
$1.5M
85,000 shares
-19%
52Moderate
AMPXsell 4
Amprius Technologies, Inc.
Donald R Dixon
director
$765k
40,000 shares
-8%
44Moderate
AMPXsell 4
Amprius Technologies, Inc.
Donald R Dixon
director
$320k
17,895 shares
-4%
30Weak
AMPXsell 4
Amprius Technologies, Inc.
Kang Sun
See Remarks
$6,121
356 shares
-0%
37Weak
AMPXsell 4
Amprius Technologies, Inc.
Constantin Ionel Stefan
Chief Technology Officer
$55k
3,208 shares
-0%
48Moderate
AMPXsell 4
Amprius Technologies, Inc.
Thomas M Stepien
Chief Executive Officer
$75k
4,375 shares
-1%
55Moderate
AMPXsell 4
Amprius Technologies, Inc.
Kang Sun
See Remarks
$1.0M
67,796 shares
-5%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Thomas M Stepien sold $42k of AMPX | InsiderTell