Prothena Corp (NASDAQ: PRTA) CAO trades 15,000 RSUs and shares
Rhea-AI Filing Summary
On July 28, 2026, Prothena Corp Public Ltd Co Chief Accounting Officer Karin L Walker exercised 15,000 restricted stock units into 15,000 ordinary shares, then disposed of 15,000 shares back to the issuer at $8.56 per share. These 15,000 RSUs, part of a 25,000-unit grant made on July 28, 2025, became fully vested on the one-year anniversary; the remaining 10,000 RSUs from that grant continue to be subject to vesting.
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Insider Trade Summary
15,000 shares exercised/converted
Exercise
3 txns
Insider
Walker Karin L
Role
Chief Accounting Officer
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Restricted Stock Units F2, F1, F3 | 15,000 | $0.00 | $0.00 |
| Exercise | Ordinary Shares, par value $0.01 per share F1 | 15,000 | -- | -- |
| Disposition | Ordinary Shares, par value $0.01 per share | 15,000 | $8.56 | $128K |
Holdings After Transaction:
Restricted Stock Units — 0 shares (Direct);
Ordinary Shares, par value $0.01 per share — 10,000 shares (Direct)
Footnotes (3)
- F1. Each restricted stock unit ("RSU") represents the contingent right to receive one share of the Issuer's Ordinary Shares upon vesting.
- F2. These RSUs reported in Table II were granted to the Reporting Person on July 28, 2025 as part of an aggregate award of 25,000 RSUs and initially reported in Table I of the Form 4 filed on July 30, 2025, because they were solely settleable in shares at the time of grant. These RSUs are being moved to Table II as of this Form 4.
- F3. These RSUs reported in Table II are fully vested as of July 28, 2026 (the one-year anniversary of the grant date). The remainder of the 25,000 RSUs reported in Table I (10,000 RSUs) are subject to vesting.
Key Figures
RSUs converted: 15,000 units
Shares disposed to issuer: 15,000 shares
Disposition price: $8.56 per share
+3 more
6 metrics
RSUs converted
15,000 units
Restricted stock units exercised into ordinary shares on July 28, 2026
Shares disposed to issuer
15,000 shares
Ordinary shares disposed to issuer at $8.56 per share on July 28, 2026
Disposition price
$8.56 per share
Per-share price for disposition to issuer of ordinary shares
Aggregate RSU grant
25,000 RSUs
Restricted stock unit award granted on July 28, 2025 to Karin L Walker
RSUs remaining subject to vesting
10,000 RSUs
Portion of the 25,000 RSU grant that remains subject to vesting after July 28, 2026
RSU vesting date
July 28, 2026
One-year anniversary of grant; date when 15,000 RSUs became fully vested
Key Terms
Restricted Stock Units, contingent right, Disposition to issuer
3 terms
Restricted Stock Units financial
"Each restricted stock unit ("RSU") represents the contingent right to receive one share"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
contingent right financial
"represents the contingent right to receive one share of the Issuer's Ordinary Shares"
Disposition to issuer financial
"transaction_code_description: "Disposition to issuer" for 15,000 ordinary shares"
AI-generated analysis. How Rhea-AI works. Not financial advice.
FAQ
What insider transaction did Prothena (PRTA) report for Karin L Walker on July 28, 2026?
On July 28, 2026, Chief Accounting Officer Karin L Walker exercised 15,000 RSUs into 15,000 ordinary shares, then disposed of 15,000 shares to the issuer at $8.56 per share. The transaction reflects an RSU vesting and immediate disposition to the company.
How many RSUs were involved in the latest Prothena (PRTA) Form 4 for Karin L Walker?
The Form 4 reports activity on 15,000 restricted stock units, which were exercised into ordinary shares. These RSUs are part of an aggregate 25,000 RSU grant, leaving 10,000 RSUs from that grant still subject to vesting after July 28, 2026.
When were Karin L Walker’s Prothena (PRTA) RSUs granted and when did they fully vest?
The RSUs were granted on July 28, 2025 as part of a 25,000 RSU award. The 15,000 RSUs reported here became fully vested on July 28, 2026, the one-year anniversary of the grant date, triggering their conversion into ordinary shares.
How many Prothena (PRTA) RSUs remain unvested for Karin L Walker from the reported grant?
From the original 25,000 RSU grant to Karin L Walker, 10,000 RSUs remain subject to vesting. The Form 4 notes that the 15,000 RSUs reported are fully vested, while the remaining portion continues to follow its vesting schedule.
What does each restricted stock unit represent in Prothena (PRTA)’s Form 4 for Karin L Walker?
Each restricted stock unit (RSU) represents a contingent right to receive one ordinary share of Prothena upon vesting. This means the holder receives one share for each RSU that successfully vests according to the award’s terms.