Prothena Corporation (PRTA)
NASDAQ: PRTA
· Real-Time Price · USD
8.20
-0.04 (-0.49%)
At close: Aug 29, 2025, 3:59 PM
8.30
1.22%
Pre-market: Sep 02, 2025, 08:00 AM EDT
PRTA Open Interest Chart
Open interest breakdown by expiration date for PRTA
options contracts. Displaying data for 5
active expiration dates with future expiry.
Total open interest across all expiries is
41,683
contracts, with 19,172
call contracts and
22,511 put contracts. The
overall put-call open interest ratio is
1.17, indicating a
bearish
bias in positioning. Options expire from
Sep 19, 2025
to
Mar 20, 2026.
Open Interest Table
| Expiry Date | Call OI | Put OI | P/C OI |
|---|---|---|---|
| Sep 19, 2025 | 11,188 | 9,554 | 0.85 |
| Oct 17, 2025 | 175 | 901 | 5.15 |
| Dec 19, 2025 | 1,049 | 5,188 | 4.95 |
| Jan 16, 2026 | 5,972 | 6,842 | 1.15 |
| Mar 20, 2026 | 788 | 26 | 0.03 |