Prothena holder buys 27K shares at $9.47
A ten percent owner of PRTA bought additional shares on September 2, 2026, increasing his direct and indirect holdings.
Rhea-AI Filing Summary
PROTHENA CORP PUBLIC LTD CO (PRTA) reporting person William P. Scully, a ten percent owner, purchased 27,000 ordinary shares on September 2, 2026 in open-market or private transactions at a weighted average price of $9.4718 per share, with individual prices ranging from $9.4072 to $9.6100.
After this purchase, he holds 827,000 shares directly, plus indirect holdings of 83,500 shares through Manatee Equity Fund LLC (for which he disclaims beneficial ownership except to the extent of his pecuniary interest) and 52,000 shares held by his spouse. No Rule 10b5-1 trading plan is reported.
Positive
- None.
Negative
- None.
Insider Trade Summary
Net Buyer: 27,000 shares
Net Buy
3 txns
Insider
SCULLY WILLIAM P
Role
10% Owner
Bought
27,000 shs ($256K)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Purchase | Ordinary Shares, par value $0.01 per share F1 | 27,000 | $9.4718 | $256K |
| holding | Ordinary Shares, par value $0.01 per share F2 | -- | -- | -- |
| holding | Ordinary Shares, par value $0.01 per share | -- | -- | -- |
Holdings After Transaction:
Ordinary Shares, par value $0.01 per share — 827,000 shares (Direct);
Ordinary Shares, par value $0.01 per share — 83,500 shares (Indirect, By Manatee Equity Fund LLC);
Ordinary Shares, par value $0.01 per share — 52,000 shares (Indirect, By Spouse)
Footnotes (2)
- F1. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $9.4072 to $9.6100, inclusive. The reporting person undertakes to provide to Prothena Corp Public Ltd Co, any security holder of Prothena Corp Public Ltd Co, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4.
- F2. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein.
Key Figures
Shares purchased: 27,000 shares
Weighted average purchase price: $9.4718 per share
Price range of purchases: $9.4072–$9.6100 per share
+4 more
7 metrics
Shares purchased
27,000 shares
Ordinary shares bought on September 2, 2026
Weighted average purchase price
$9.4718 per share
Open-market or private purchase on September 2, 2026
Price range of purchases
$9.4072–$9.6100 per share
Multiple transactions included in the reported weighted average price
Direct holdings after transaction
827,000 shares
Ordinary shares held directly after September 2, 2026 purchase
Indirect holdings via Manatee Equity Fund LLC
83,500 shares
Indirect ownership; beneficial ownership disclaimed except for pecuniary interest
Indirect holdings by spouse
52,000 shares
Ordinary shares held indirectly through spouse
Approximate transaction value
About $255,700
27,000 shares at $9.4718 weighted average price
Key Terms
weighted average price, beneficial ownership, pecuniary interest
3 terms
weighted average price financial
"The price reported ... is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
beneficial ownership regulatory
"The reporting person disclaims beneficial ownership of these securities..."
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
pecuniary interest financial
"except to the extent of his pecuniary interest therein."
FAQ
What insider transaction did PRTA ten percent owner William P. Scully report?
He reported a purchase of 27,000 ordinary shares of PRTA on September 2, 2026 in an open-market or private transaction, as shown by the Form 4 data.
What indirect PRTA holdings are associated with William P. Scully?
Indirectly, there are 83,500 shares held through Manatee Equity Fund LLC and 52,000 shares held by his spouse. He disclaims beneficial ownership of the Manatee-held shares except to the extent of his pecuniary interest.
Was the PRTA insider trade made under a Rule 10b5-1 trading plan?
No. The filing indicates no Rule 10b5-1 trading plan applies to the reported September 2, 2026 transaction.
AI-generated analysis. How Rhea-AI works. Not financial advice.
