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sellWeak cluster of 510b5-1 plan

Philip Mazzara sold $1.2M of ALAB

General Counsel and Secretary at Astera Labs, Inc.. 10,000 shares at an average of $117.47, traded Mar 2, 2026, filed Mar 4, 2026.

Warning score
35
Value
$1.2M
10,000 shares
Holdings after
128,084
-7% from before
From 52-week low
+128%
low $52.94, close $120.55
From 52-week high
-52%
high $251.88, as of Mar 2, 2026

Score components

  • Role
    Officer
    +15
  • Trade size
    $1.2M at market
    +25
  • Share of holdings sold
    Sold 7.2% of holdings
    0
  • Cluster
    5 insiders selling within 14 days
    +15
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

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.

ALABOct 9, 2026 · close 342.21
Since filing Mar 4, 2026: +200.8%SPY +14.5% · excess +186.3%

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 0001998163-26-000007, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Mar 2, 2026SOpen-market sale
Common Stock10b5-1
-1,200$113.85$137k136,884Mar 4, 2026
Mar 2, 2026SOpen-market sale
Common Stock10b5-1
-677$114.81$78k136,207Mar 4, 2026
Mar 2, 2026SOpen-market sale
Common Stock10b5-1
-750$115.84$87k135,457Mar 4, 2026
Mar 2, 2026SOpen-market sale
Common Stock10b5-1
-1,205$116.85$141k134,252Mar 4, 2026
Mar 2, 2026SOpen-market sale
Common Stock10b5-1
-3,200$117.92$377k131,052Mar 4, 2026
Mar 2, 2026SOpen-market sale
Common Stock10b5-1
-1,202$118.89$143k129,850Mar 4, 2026
Mar 2, 2026SOpen-market sale
Common Stock10b5-1
-1,566$120.23$188k128,284Mar 4, 2026
Mar 2, 2026SOpen-market sale
Common Stock10b5-1
-200$120.98$24k128,084Mar 4, 2026

Related signals

Other insiders at Astera Labs, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
25Weak
ALABsell10b5-1
Astera Labs, Inc.
Stefan A Dyckerhoff
director
$4.7M
12,499 shares
-25%
33Weak
ALABsell 210b5-1
Astera Labs, Inc.
Manuel Alba
director
$51M
183,000 shares
-14%
33Weak
ALABsell 210b5-1
Astera Labs, Inc.
Stefan A Dyckerhoff
director
$3.4M
12,499 shares
-23%
38Weak
ALABsell 210b5-1
Astera Labs, Inc.
Jitendra Mohan
Chief Executive Officer
$21M
157,500 shares
-3%
24Weak
ALABsell 310b5-1
Astera Labs, Inc.
Jack R Lazar
director
$325k
2,500 shares
-3%
34Weak
ALABsell 310b5-1
Astera Labs, Inc.
Jack R Lazar
director
$898k
7,500 shares
-8%
62Notable
ALABsell 4
Astera Labs, Inc.
Michael Truett Tate
Chief Financial Officer
$1.5M
12,001 shares
-6%
65Notable
ALABsell 4
Astera Labs, Inc.
Jitendra Mohan
Chief Executive Officer
$12M
94,971 shares
-6%
49Moderate
ALABsell 4
Astera Labs, Inc.
Philip Mazzara
General Counsel and Secretary
$600k
4,849 shares
-3%
60Notable
ALABsell 4
Astera Labs, Inc.
Sanjay Gajendra
President and COO
$12M
94,971 shares
-6%

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.

Philip Mazzara sold $1.2M of ALAB | InsiderTell