Prothena insider buys 50,000 shares in open market
PROTHENA CORP PUBLIC LTD CO major shareholder William P. Scully reported an open-market purchase of 50,000 ordinary shares on June 4, 2026 at a weighted average price of $9.3059 per share.
Rhea-AI Filing Summary
PROTHENA CORP PUBLIC LTD CO major shareholder William P. Scully reported an open-market purchase of 50,000 ordinary shares on June 4, 2026 at a weighted average price of $9.3059 per share. Following this transaction, he holds 936,000 shares directly.
He also reports indirect holdings of 52,000 shares by his spouse and 80,000 shares by Manatee Equity Fund LLC, and disclaims beneficial ownership of these indirect positions except to the extent of his pecuniary interest.
Positive
- None.
Negative
- None.
Insider Trade Summary
Net Buyer: 50,000 shares
Net Buy
3 txns
Insider
SCULLY WILLIAM P
Role
10% Owner
Bought
50,000 shs ($465K)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Purchase | Ordinary Shares, par value $0.01 per share | 50,000 | $9.3059 | $465K |
| holding | Ordinary Shares, par value $0.01 per share | -- | -- | -- |
| holding | Ordinary Shares, par value $0.01 per share | -- | -- | -- |
Holdings After Transaction:
Ordinary Shares, par value $0.01 per share — 936,000 shares (Direct);
Ordinary Shares, par value $0.01 per share — 80,000 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 $9.1000 to $9.4097, 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
Open-market purchase: 50,000 shares
Purchase price: $9.3059 per share
Direct holdings after transaction: 936,000 shares
+3 more
6 metrics
Open-market purchase
50,000 shares
Ordinary shares bought on June 4, 2026
Purchase price
$9.3059 per share
Weighted average price for 50,000-share buy
Direct holdings after transaction
936,000 shares
Direct ordinary shares following June 4, 2026 trade
Spouse indirect holdings
52,000 shares
Ordinary shares held indirectly by spouse
Manatee Equity Fund LLC holdings
80,000 shares
Ordinary shares held indirectly via Manatee Equity Fund LLC
Net share change
50,000 shares
Net-buy shares from reported transactions
Key Terms
open-market purchase, weighted average price, beneficial ownership, pecuniary interest, +1 more
5 terms
open-market purchase financial
"Purchase in open market or private transaction"
An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.
weighted average price financial
"The price reported in Column 4 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 financial
"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."
indirect ownership financial
"ownership_type": "indirect""
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What insider transaction did William P. Scully report for PROTHENA CORP PUBLIC LTD CO (PRTA)?
William P. Scully reported buying 50,000 Prothena ordinary shares in an open-market transaction. The weighted average price was $9.3059 per share, and the trade occurred on June 4, 2026, increasing his direct ownership stake in the company.
Does the Prothena insider Form 4 mention beneficial ownership disclaimers?
Yes. The filing states that William P. Scully disclaims beneficial ownership of certain indirectly held Prothena shares, except for his pecuniary interest. This language clarifies that legal or voting control over some indirectly reported positions may differ from his economic exposure.
AI-generated analysis. How Rhea-AI works. Not financial advice.
