Historical Stock Price
PRTO historical stock prices picture
PRTO (PRTO) has the following price history information. Looking back at PRTO historical stock prices for the last five trading days, on January 03, 2020, PRTO opened at $0.43, traded as high as $0.48 and as low as $0.42, and closed at $0.47. Trading volume was a total of 254.70K shares. On January 06, 2020, PRTO opened at $0.48, traded as high as $0.53 and as low as $0.45, and closed at $0.52. Trading volume was a total of 662.30K shares. On January 07, 2020, PRTO opened at $0.52, traded as high as $0.55 and as low as $0.50, and closed at $0.55. Trading volume was a total of 551.20K shares. On January 08, 2020, PRTO opened at $0.57, traded as high as $0.70 and as low as $0.54, and closed at $0.65. Trading volume was a total of 853.50K shares. On January 09, 2020, PRTO opened at $0.75, traded as high as $0.95 and as low as $0.63, and closed at $0.83. Trading volume was a total of 3.92M shares.

PRTO Historical Stock Prices By Date:

PRTO historical cagr picture

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

Growth of $10,000.00
Without Dividends Reinvested

Start date: 10/23/2014
End date: 01/09/2020
Start price/share: $10.00
End price/share: $0.83
Dividends collected/share: $0.00
Total return: -91.65%
Average Annual Total Return: -37.87%
Starting investment: $10,000.00
Ending investment: $835.16
Years: 5.22
Date Open High Low Close Volume
01/03/2020 $0.43 $0.48 $0.42 $0.47 254.70K
01/06/2020 $0.48 $0.53 $0.45 $0.52 662.30K
01/07/2020 $0.52 $0.55 $0.50 $0.55 551.20K
01/08/2020 $0.57 $0.70 $0.54 $0.65 853.50K
01/09/2020 $0.75 $0.95 $0.63 $0.83 3.92M
Proteon Therapeutics is a late-stage biopharmaceutical company focused on the development of pharmaceuticals for renal and vascular disease. Co.'s product candidate, vonapanitase, is a recombinant human elastase developed to improve vascular access outcomes in patients with chronic kidney disease undergoing or planning for hemodialysis. Co.'s other programs include the development of vonapanitase in brachiocephalic fistula creation, and arteriovenous grafts, a synthetic tube to connect a vein and an artery placed in a surgical procedure. In addition to vascular access indications, Co. is investigating vonapanitase as a treatment for patients with symptomatic peripheral artery disease.
Date Close
01/03/2020$0.47
01/06/2020$0.52
01/07/2020$0.55
01/08/2020$0.65
01/09/2020$0.83
PRTO is categorized under the Healthcare sector; below are some other companies in the same sector:

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Also explore: PRTO shares outstanding history

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