Stock Surge: Prothena Corporation plc (PRTA) Closes at $10.27, Marking a -4.47 Increase/Decrease

Abby Carey

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In the latest session, Prothena Corporation plc (NASDAQ: PRTA) closed at $10.27 down -4.47% from its previous closing price of $10.75. In other words, the price has decreased by -$4.47 from its previous closing price. On the day, 0.65 million shares were traded. PRTA stock price reached its highest trading level at $11.13 during the session, while it also had its lowest trading level at $10.22.

Ratios:

For a deeper understanding of Prothena Corporation plc’s stock, let’s take a closer look at its various ratios. For the most recent quarter (mrq), Quick Ratio is recorded 6.61 and its Current Ratio is at 6.61. In the meantime, Its Debt-to-Equity ratio is 0.03 whereas as Long-Term Debt/Eq ratio is at 0.02.

Insider Transactions:

Additionally, insider trades can be beneficial to investors who want to learn what the management thinks about stock prices in the future. A recent insider transaction in this stock occurred on May 02 ’25 when EcoR1 Capital, LLC sold 3,317,938 shares for $8.36 per share. The transaction valued at 27,744,929 led to the insider holds 8,266,342 shares of the business.

EcoR1 Capital, LLC sold 1,984,053 shares of PRTA for $15,164,712 on May 06 ’25. The 10% Owner now owns 5,304,596 shares after completing the transaction at $7.64 per share. On May 05 ’25, another insider, EcoR1 Capital, LLC, who serves as the 10% Owner of the company, sold 977,693 shares for $8.11 each. As a result, the insider received 7,930,166 and left with 7,288,649 shares of the company.

Valuation Measures:

Investors should consider key stock statistics when deciding whether to invest or divest. In the wake of the recent closing price, PRTA now has a Market Capitalization of 552833984 and an Enterprise Value of 231072912. For the stock, the TTM Price-to-Sale (P/S) ratio is 46.89 while its Price-to-Book (P/B) ratio in mrq is 1.87. Its current Enterprise Value per Revenue stands at 19.606 whereas that against EBITDA is -1.044.

Stock Price History:

The Beta on a monthly basis for PRTA is -0.10, which has changed by -0.21988392 over the last 52 weeks, in comparison to a change of 0.12607694 over the same period for the S&P500. Over the past 52 weeks, PRTA has reached a high of $17.66, while it has fallen to a 52-week low of $4.32. The 50-Day Moving Average of the stock is 1.50%, while the 200-Day Moving Average is calculated to be 11.87%.

Shares Statistics:

For the past three months, PRTA has traded an average of 674.02K shares per day and 519280 over the past ten days. A total of 53.83M shares are outstanding, with a floating share count of 43.39M. Insiders hold about 19.39% of the company’s shares, while institutions hold 79.71% stake in the company. Shares short for PRTA as of 1763078400 were 4657490 with a Short Ratio of 6.91, compared to 1760486400 on 3857015. Therefore, it implies a Short% of Shares Outstanding of 4657490 and a Short% of Float of 10.319999600000001.

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