PRTA · Prothena Corp Public Ltd Co · Share Buybacks
$8.46
+0.08 (+0.95%)
At close · Oct 1
Return incl. dividend (before tax)
Market Cap
$425.58M
Shares
51.34M
Volume · Sep 30
634.78K
Avg daily vol (3M)
469.92K
Share-repurchase activity from the company's own XBRL filings — cash spent on equity repurchases (common and preferred combined, as reported) per fiscal year and per recent quarter, share counts where the company tagged them, and the buyback program's authorization — paired with the company's at-the-market (ATM) equity offering programs, the dilution side of the same picture. Repurchase amounts come exclusively from tagged SEC data; program figures with no tagged equivalent (untagged authorizations and all ATM figures) are read from the filing's own text and shown only after verification.
Program Utilization
22.3%
$22,300,000 used of $100,000,000
Repurchase Programs
| Program Announced | Authorized | Remaining | As of | Runs Through | Source |
|---|---|---|---|---|---|
| 2026-02-27 | $100,000,000 | — | — | 2026-12-31 | 8-K , filed 2026-02-27 |
Equity Offering (ATM) Programs
| Program Established | Last Amended | Capacity | Remaining | Runs Through | Source |
|---|---|---|---|---|---|
| 2021-12 | 2024-02-22 | $250,000,000 | — | — | 10-K , filed 2026-02-27 |
Cash spent on buybacks by quarter
Cash deployed each quarter. Δ marks quarters derived from the company's cumulative year-to-date disclosures.
Repurchase History
| Quarter Ended | Cash Spent | Source |
|---|---|---|
| 2026-06-30 | $15,568,000 Δ | 10-Q, filed 2026-08-06 |
| 2026-03-31 | $6,946,000 | 10-Q, filed 2026-05-07 |
| 2025-06-30 | $0 Δ | 10-Q, filed 2026-08-06 |
| 2025-03-31 | $0 | 10-Q, filed 2026-05-07 |