Prothena Corporation (PRTA)
NASDAQ: PRTA
· Real-Time Price · USD
8.61
0.36 (4.36%)
At close: Aug 18, 2025, 11:43 AM
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
33,754
contracts, with 17,217
call contracts and
16,537 put contracts. The
overall put-call open interest ratio is
0.96, indicating a
bullish
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 | 9,932 | 6,034 | 0.61 |
| Oct 17, 2025 | 0 | 2 | n/a |
| Dec 19, 2025 | 939 | 3,636 | 3.87 |
| Jan 16, 2026 | 5,686 | 6,841 | 1.20 |
| Mar 20, 2026 | 660 | 24 | 0.04 |