Investor FAQs

Where is Proteostasis Therapeutics, Inc. corporate headquarters?
The Company’s headquarters are located at 200 Technology Square, 4th Floor, Cambridge, MA 02139. The main office number is 617-225-0096.
When was Proteostasis Therapeutics, Inc. founded?
The Company was founded in 2006.
Where is the Company incorporated?
Proteostasis Therapeutics, Inc. was incorporated in Delaware on December 13, 2006 under the name Proteoguard, Inc. and subsequently changed the name to Proteostasis Therapeutics, Inc. on September 17, 2007.
When did Proteostasis Therapeutics, Inc. go public? What was the price?
The Company's IPO took place on February 11, 2016 at a price of $8.00.
What is Proteostasis Therapeutics, Inc. fiscal year?
The Company’s fiscal year ends on December 31st.
How is Proteostasis Therapeutics, Inc. stock traded?
The Company’s common stock is listed on the NASDAQ Global Market under the symbol “PTI”.
Who is Proteostasis Therapeutics, Inc. transfer agent?
American Stock Transfer & Trust Company, LLC.
6201 15th Avenue, 3rd Floor,
Brooklyn, NY 11219
Whom do I contact with questions about my stock?
For questions about your stock certificates please contact our transfer agent, American Stock Transfer & Trust Company, LLC.
How do I transfer stock, change the address on my shareholder account, or replace a lost stock certificate?
To change the address on your shareholder account you must send both your old and new addresses to our transfer agent, American Stock Transfer & Trust Company, LLC.

To replace a lost stock certificate, contact our transfer agent, American Stock Transfer & Trust Company, LLC. The transfer agent can look up your records and make any necessary adjustments. There may be a fee involved for replacing lost stock certificates.
Does the Company have a direct stock purchase plan?
The Company does not currently have a direct stock purchase plan. Its common stock can be purchased by contacting a securities broker of your choice.
Who is the Company's auditor?
PricewaterhouseCoopers LLP
101 Seaport Boulevard, Suite 500,
Boston MA 02210
Who is the Company’s legal counsel?
Goodwin Procter, LLP.
53 State Street
Boston, MA 02109
Where can I find out more about Proteostasis Therapeutics, Inc.?
To find out more about Proteostasis Therapeutics, Inc. visit the Company’s webpage at
Where can I get the latest corporate news releases and financial reports?
Proteostasis Therapeutics press release archive can be viewed under the “News and Events” section under the “Investor Relations” tab. Financial reports are available under the “Financial Information” section under the “Investor Relations” tab located at our website
How can I view documents Proteostasis Therapeutics, Inc. has filed with the Securities & Exchange Commission (SEC), including Forms 10-K and 10-Q?
The Company’s quarterly and annual reports, as well as other SEC filings, can be found on the Financial Information portion of the Investor Relations website or directly from the SEC at
Who makes up the Proteostasis Therapeutics, Inc. Executive Management team and Board of Directors?
For a list of the Executive Management team and the Board of Directors please visit the “Company” tab of our website.
Whom should I contact regarding investor inquiries?
You can reach our IR team by contacting