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sellNotable cluster of 5

Timothy Chen sold $5.6M of AMBQ

director at Ambiq Micro, Inc.. 70,592 shares at an average of $79.79, traded May 27, 2026, filed May 29, 2026.

Warning score
75
Value
$5.6M
70,592 shares
Holdings after
0
-100% from before
From 52-week low
+254%
low $22.76, close $80.57
From 52-week high
-4%
high $83.55, as of May 27, 2026

Score components

  • Role
    Director
    +15
  • Trade size
    $5.6M at market
    +25
  • Share of holdings sold
    Sold 100% of holdings
    +20
  • Cluster
    5 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.

AMBQOct 9, 2026 · close 58.56
Since filing May 29, 2026: -26.5%SPY +3.4% · excess -29.9%

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 0001818099-26-000007, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
May 27, 2026SOpen-market sale
Common Stockindirect: By: Triumph Way Investment Inc.
-22,414$78.85$1.8M48,178May 29, 2026
May 27, 2026SOpen-market sale
Common Stockindirect: By: Triumph Way Investment Inc.
-24,248$79.72$1.9M23,930May 29, 2026
May 27, 2026SOpen-market sale
Common Stockindirect: By: Triumph Way Investment Inc.
-20,666$80.61$1.7M3,264May 29, 2026
May 27, 2026SOpen-market sale
Common Stockindirect: By: Triumph Way Investment Inc.
-3,264$81.57$266k0May 29, 2026

Related signals

Other insiders at Ambiq Micro, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
53Moderate
AMBQsell 4
Ambiq Micro, Inc.
Jeffrey G Winzeler
Chief Financial Officer
$380k
5,455 shares
-5%
49Moderate
AMBQsell 4
Ambiq Micro, Inc.
Scott McLean Hanson
Chief Technology Officer
$604k
8,680 shares
-4%
65Notable
AMBQsell 4
Ambiq Micro, Inc.
Fumihide Esaka
Chief Executive Officer
$1.2M
16,560 shares
-4%
44Moderate
AMBQsell 410b5-1
Ambiq Micro, Inc.
Sean Chihhsiang Chen
President and COO
$952k
14,007 shares
-12%
11Weak
AMBQsell 410b5-1
Ambiq Micro, Inc.
Scott McLean Hanson
Chief Technology Officer
$422k
7,000 shares
-3%
60Notable
AMBQsell 4
Ambiq Micro, Inc.
Ker Zhang
director
$634k
10,000 shares
-33%
35Weak
AMBQsell 410b5-1
Ambiq Micro, Inc.
Fumihide Esaka
Chief Executive Officer
$4.0M
63,500 shares
-12%
29Weak
AMBQsell 410b5-1
Ambiq Micro, Inc.
Sean Chihhsiang Chen
President and COO
$902k
15,000 shares
-11%
15Weak
AMBQsell 4
Ambiq Micro, Inc.
Ker Zhang
director
$11k
185 shares
-1%
28Weak
AMBQsell 410b5-1
Ambiq Micro, Inc.
Sean Chihhsiang Chen
President and COO
$858k
15,000 shares
-11%

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.

Timothy Chen sold $5.6M of AMBQ | InsiderTell