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sellWeak cluster of 310b5-1 plan

Lambert Shiu sold $595k of PEN

Chief Accounting Officer at Penumbra Inc. 2,452 shares at an average of $242.68, traded Nov 29, 2024, filed Dec 3, 2024.

Warning score
19
Value
$595k
2,452 shares
Holdings after
20,028
-11% from before
From 52-week low
-
no price yet
From 52-week high
-
no price yet

Score components

  • Role
    Officer
    +15
  • Trade size
    $595k at market
    +19
  • Share of holdings sold
    Sold 11% of holdings
    +5
  • Cluster
    3 insiders selling within 14 days
    +15
  • Exercise and sell
    Shares came from an option exercise in the same filing
    -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.

This signal so far: 1m -2.1%, 3m +15.7%, 6m +4.9%.

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.

PENOct 9, 2026 · close 319.40
Since filing Dec 3, 2024: +30.2%SPY +31.9% · excess -1.7%

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 0001321732-24-000129, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Nov 29, 2024SOpen-market sale
Common Stock10b5-1
-1,798$242.56$436k20,682Dec 3, 2024
Dec 2, 2024SOpen-market sale
Common Stock10b5-1
-654$243.01$159k20,028Dec 3, 2024
Dec 3, 2024MOption exercise
Common Stock10b5-1
+5,250$12.36$65k25,278Dec 3, 2024
Dec 3, 2024MOption exercise
Stock Option (right to buy)derivative10b5-1
-5,250$0.00$00Dec 3, 2024

Related signals

Other insiders at Penumbra Inc and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
30Weak
PENsell10b5-1
Penumbra Inc
Maggie Yuen
Chief Financial Officer
$832k
2,432 shares
-12%
10Weak
PENsell 210b5-1
Penumbra Inc
Harpreet Grewal
director
$58k
186 shares
-2%
30Weak
PENsell 210b5-1
Penumbra Inc
Thomas Wilder
director
$58k
186 shares
-100%
35Weak
PENsell 310b5-1
Penumbra Inc
Arani Bose
director
$4.6M
15,000 shares
-5%
19Weak
PENsell 310b5-1
Penumbra Inc
Johanna Roberts
EVP, Gen. Counsel & Secretary
$90k
300 shares
-0%
15Weak
PENsell 310b5-1
Penumbra Inc
Harpreet Grewal
director
$29k
100 shares
-1%
22Weak
PENsell 310b5-1
Penumbra Inc
Johanna Roberts
EVP, Gen. Counsel & Secretary
$177k
600 shares
-1%
35Weak
PENsell 310b5-1
Penumbra Inc
Arani Bose
director
$2.3M
7,500 shares
-3%
29Weak
PENsell 310b5-1
Penumbra Inc
Johanna Roberts
EVP, Gen. Counsel & Secretary
$540k
1,800 shares
-3%
35Weak
PENsell 310b5-1
Penumbra Inc
Arani Bose
director
$2.2M
7,500 shares
-3%

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.

Lambert Shiu sold $595k of PEN | InsiderTell