Transaction · 0001045463-26-000014

Scully William P

SCULLY WILLIAM P, 10%, reported an open-market or private purchase at PROTHENA CORP PUBLIC LTD CO involving 50000.000000 shares for an estimated $439430.00. Reported holdings after the transaction were 800000.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market buySEC transaction code P10%
PRTAPROTHENA CORP PUBLIC LTD CO
Trade date
Aug 20, 2026
Filing date
Aug 21, 2026
View on SEC Insider profile
Estimated value$439kShares × reported price
Shares traded50.0k$8.79 per share
Holdings after800kDirect
% of reported position traded6.67%This security and ownership context
How reported position traded is calculated

Shares purchased ÷ (holdings after − shares purchased). Estimated position before: 750,000 shares.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

PRTA price since this filing

Daily closing prices, with the filing date and available return windows
PRTA · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago -7.3%1w ago -3.8%1d ago -1.7%
Returns since7d -1.2%30d -9.1%90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Buy
Code P
Identifier
0001045463-26-000014
Ordinary Shares, par value $0.01 per share
Transaction date
Aug 20, 2026
Filed Aug 21, 2026, 06:32 PM · 1d delay
Shares
50,000 sh
$8.79 per share
Estimated value
$439k
Computed from shares × price
Holdings after
800,000 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Direct Ownership 10% Owner Buy
Filing-only score

+26 points

Compact filing score computed from stored Form 4 facts. Version v1.

Strong filing signal

This filing has a high positive filing-only score. It may deserve closer research, but it is not an investment recommendation.

How this score is calculated
  • open_market_purchase+12 points

    transaction_code = P

    Code P is a discretionary open-market purchase.
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
  • ten_percent_owner_buy+4 points

    is_ten_percent_owner = true

    10% beneficial owner open-market purchase.
  • timely_filing+4 points

    reporting_delay_days = 1

    Filing reported within two business days of the transaction.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

No officer title

Officer NoDirector No10% YesOther No
Footnotes & amended
  1. F1

    The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $8.7497 to $8.9000, inclusive. The reporting person undertakes t…

  2. F2

    The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein.

Original filing · 0001045463-26-000014
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