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sellWeak10b5-1 plan

Karin L Walker sold $186k of PRTA

Chief Accounting Officer at PROTHENA CORP PUBLIC LTD CO. 5,000 shares at an average of $37.19, traded Dec 20, 2023, filed Dec 20, 2023.

Warning score
12
Value
$186k
5,000 shares
Holdings after
0
-100% from before
From 52-week low
+14%
low $32.31, close $36.92
From 52-week high
-53%
high $78.59, as of Dec 20, 2023

Score components

  • Role
    Officer
    +15
  • Trade size
    $186k at market
    +12
  • Share of holdings sold
    Sold 100% of holdings
    +20
  • Cluster
    No other insider selling within 14 days
    0
  • 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 -10.5%, 3m -30.9%, 6m -47.1%.

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.

PRTAOct 12, 2026 · close 8.43
Since filing Dec 20, 2023: -77.2%SPY +71.6% · excess -148.8%

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 0000905148-23-001682, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Dec 20, 2023MOption exercise
Ordinary Shares, par value $0.01 per share10b5-1
+5,000$13.53$68k5,000Dec 20, 2023
Dec 20, 2023SOpen-market sale
Ordinary Shares, par value $0.01 per share10b5-1
-1,678$36.68$62k3,322Dec 20, 2023
Dec 20, 2023SOpen-market sale
Ordinary Shares, par value $0.01 per share10b5-1
-3,322$37.45$124k0Dec 20, 2023
Dec 20, 2023MOption exercise
Stock Option (Right to Buy)derivative10b5-1
-5,000$0.00$020,000Dec 20, 2023

Related signals

Other insiders at PROTHENA CORP PUBLIC LTD CO and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
Pro nowfree Oct 16, 2026
PRTAbuy
PROTHENA CORP PUBLIC LTD CO
William P Scully
owner
$1.8M
215,000 shares
+68%
55Moderate
PRTAbuy
PROTHENA CORP PUBLIC LTD CO
William P Scully
owner
$857k
100,000 shares
+47%
51Moderate
PRTAbuy
PROTHENA CORP PUBLIC LTD CO
William P Scully
owner
$1.4M
162,000 shares
+312%
49Moderate
PRTAbuy
PROTHENA CORP PUBLIC LTD CO
William P Scully
owner
$890k
103,500 shares
+124%
52Moderate
PRTAbuy
PROTHENA CORP PUBLIC LTD CO
William P Scully
owner
$843k
100,000 shares
+12%
29Weak
PRTAbuy
PROTHENA CORP PUBLIC LTD CO
William P Scully
owner
$256k
27,000 shares
+3%
36Weak
PRTAbuy
PROTHENA CORP PUBLIC LTD CO
William P Scully
owner
$439k
50,000 shares
+7%
30Weak
PRTAbuy
PROTHENA CORP PUBLIC LTD CO
William P Scully
owner
$323k
37,500 shares
+5%
16Weak
PRTAsell 210b5-1
PROTHENA CORP PUBLIC LTD CO
Michael John Isaacs
General Counsel & Company Sec.
$71k
8,386 shares
-19%
16Weak
PRTAsell 210b5-1
PROTHENA CORP PUBLIC LTD CO
Anne Evans Kingston
Chief Strategy Officer
$65k
7,662 shares
-12%

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.

Karin L Walker sold $186k of PRTA | InsiderTell