Historical Stock Price
PRTA historical stock prices picture
Prothena (PRTA) has the following price history information. Looking back at PRTA historical stock prices for the last five trading days, on April 16, 2024, PRTA opened at $21.67, traded as high as $22.14 and as low as $21.06, and closed at $21.34. Trading volume was a total of 479.70K shares. On April 17, 2024, PRTA opened at $21.61, traded as high as $21.70 and as low as $20.95, and closed at $21.00. Trading volume was a total of 465.50K shares. On April 18, 2024, PRTA opened at $20.97, traded as high as $21.26 and as low as $20.44, and closed at $20.57. Trading volume was a total of 567.70K shares. On April 19, 2024, PRTA opened at $20.56, traded as high as $21.18 and as low as $20.41, and closed at $21.16. Trading volume was a total of 508.50K shares. On April 22, 2024, PRTA opened at $21.20, traded as high as $21.79 and as low as $20.87, and closed at $21.29. Trading volume was a total of 394.50K shares.

PRTA Historical Stock Prices By Date:

PRTA historical cagr picture

Below, we examine the compound annual growth rate — CAGR for short — of an investment into Prothena shares, starting with a $10,000 purchase of PRTA, and working forward through the historical stock price information to today.

Growth of $10,000.00
Without Dividends Reinvested

Start date: 04/24/2014
End date: 04/22/2024
Start price/share: $39.62
End price/share: $21.29
Dividends collected/share: $0.00
Total return: -46.26%
Average Annual Total Return: -6.02%
Starting investment: $10,000.00
Ending investment: $5,373.79
Years: 10.00
Date Open High Low Close Volume
04/16/2024 $21.67 $22.14 $21.06 $21.34 479.70K
04/17/2024 $21.61 $21.70 $20.95 $21.00 465.50K
04/18/2024 $20.97 $21.26 $20.44 $20.57 567.70K
04/19/2024 $20.56 $21.18 $20.41 $21.16 508.50K
04/22/2024 $21.20 $21.79 $20.87 $21.29 394.50K
Prothena is a biotechnology company engaged in the protein dysregulation and a pipeline of investigational therapeutics with the potential to change the course of devastating rare neurodegenerative and peripheral amyloid diseases. Co. is developing a pipeline of therapeutic candidates for a number of indications and targets for which its ability to integrate scientific insights around neurological dysfunction and the biology of misfolded proteins can be utilized. Co.'s wholly-owned programs include birtamimab for the treatment of AL amyloidosis, a portfolio of programs for the treatment of Alzheimer's disease including PRX012 that targets Amyloid beta and a dual Amyloid beta-Tau vaccine.
Date Close
04/16/2024$21.34
04/17/2024$21.00
04/18/2024$20.57
04/19/2024$21.16
04/22/2024$21.29
PRTA is categorized under the Healthcare sector; below are some other companies in the same sector:

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Also explore: PRTA shares outstanding history

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