1 unchanged sentence
Market Information
−Removed: Our common stock began trading on The Nasdaq Global Market on August 11, 2016 and trades under the symbol “PTGX.” Prior to such time, there was no public market for our common stock.
−Removed: As of the close of business on February 26, 2021, there were 2 stockholders of record of our common stock.
+Added: Our common stock trades on The Nasdaq Stock Market, LLC under the symbol “PTGX.” Prior to August 11, 2016, there was no public market for our common stock.
+Added: As of the close of business on February 15, 2022, there were two stockholders of record of our common stock.
The number of stockholders of record is based upon the actual number of stockholders registered at such date and does not include holders of shares in “street names” or persons, partnerships, associates, or corporations, or other entities identified in security listings maintained by depositories.
4 unchanged sentences
The graph below shows the cumulative total stockholder return assuming the investment on the date specified in each of our common stock, the Nasdaq Composite Index, the Nasdaq Biotechnology Index, and the Nasdaq Pharmaceutical Index.
−Removed: The graph tracks the performance of a $100 investment in our common stock and in each index (with the reinvestment of all dividends) from August 11, 2016 to December 31, 2020.
+Added: The graph tracks the performance of a $100 investment in our common stock and in each index (with the reinvestment of all dividends) from December 31, 2016 to December 31, 2021.
Sale of Unregistered Securities
Repurchases of Shares or of Company Equity Securities
−Removed: Selected Financial Data
−Removed: This item is no longer required as we have elected to early adopt the changes to Item 301 of Regulation S-K.
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.