Prothena (PRTA) CDO exercises 51,000 RSUs, returns and withholds shares
Rhea-AI Filing Summary
PROTHENA CORP PUBLIC LTD CO Chief Development Officer Chad J. Swanson exercised 51,000 restricted stock units into the same number of ordinary shares on July 28, 2026. On the same date he returned 40,800 shares to the issuer and had 3,467 shares withheld at $8.56 per share to pay the exercise price or tax liabilities. These RSUs were part of an 85,000‑unit grant made July 28, 2025, of which 34,000 RSUs remain subject to vesting.
Positive
- None.
Negative
- None.
Insider Trade Summary
Net Buyer: 6,733 shares
Net Buy
4 txns
Insider
Swanson Chad J.
Role
Chief Development Officer
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Restricted Stock Units F2, F1, F3 | 51,000 | $0.00 | $0.00 |
| Exercise | Ordinary Shares, par value $0.01 per share F1 | 51,000 | -- | -- |
| Disposition | Ordinary Shares, par value $0.01 per share | 40,800 | $8.56 | $349K |
| Exercise Price or Tax Liability | Ordinary Shares, par value $0.01 per share | 3,467 | $8.56 | $30K |
Holdings After Transaction:
Restricted Stock Units — 0 shares (Direct);
Ordinary Shares, par value $0.01 per share — 40,733 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 85,000 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 85,000 RSUs reported in Table I (34,000 RSUs) are subject to vesting.
Key Figures
RSUs exercised: 51,000 units
Shares disposed to issuer: 40,800 shares
Shares withheld for obligations: 3,467 shares
+3 more
6 metrics
RSUs exercised
51,000 units
Restricted Stock Units converted into ordinary shares on July 28, 2026
Shares disposed to issuer
40,800 shares
Ordinary shares returned to issuer at $8.56 per share
Shares withheld for obligations
3,467 shares
Withheld at $8.56 per share to pay exercise price or tax liability
Share price for dispositions
$8.56 per share
Applied to both shares returned to issuer and shares withheld
Original RSU grant size
85,000 RSUs
Grant awarded to Chad J. Swanson on July 28, 2025
Unvested RSUs remaining
34,000 RSUs
Portion of the 85,000‑unit grant still subject to vesting
Key Terms
Restricted Stock Units, Disposition to issuer, Payment of exercise price or tax liability, Ordinary Shares
4 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.
Disposition to issuer financial
"transaction_code_description": "Disposition to issuer""
Payment of exercise price or tax liability financial
"transaction_code_description": "Payment of exercise price or tax liability by delivering"
AI-generated analysis. How Rhea-AI works. Not financial advice.
FAQ
What insider equity transactions did Prothena (PRTA) report for Chad J. Swanson?
Prothena reported that Chief Development Officer Chad J. Swanson exercised 51,000 RSUs into ordinary shares on July 28, 2026, then returned 40,800 shares to the issuer and had 3,467 shares withheld at $8.56 per share to satisfy exercise-price or tax obligations.
How many Prothena (PRTA) RSUs vested for Chad J. Swanson and what grant were they from?
On July 28, 2026, 51,000 RSUs fully vested for Chad J. Swanson. They came from an 85,000‑RSU grant awarded on July 28, 2025. According to the disclosure, 34,000 RSUs from that grant remain unvested and subject to future vesting conditions.
How many Prothena (PRTA) RSUs from Chad J. Swanson’s 2025 grant remain unvested?
From the original 85,000‑RSU grant dated July 28, 2025, the company states that 34,000 RSUs remain subject to vesting. The other 51,000 RSUs reported in the filing are fully vested and were converted into ordinary shares.