Monday, January 10, 2022

Equity Corporate Actions Alert #2022 - 2
Information Regarding the Business Combination of Petra Acquisition, Inc. (PAIC/W/U) and Revelation Biosciences, Inc.

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The business combination of Petra Acquisition, Inc. (PAIC/W/U) and Revelation Biosciences, Inc. became effective today, January 10, 2022. Following the completion of the business combination, the company's Common Stock (PAIC), Warrants (PAICW), and Units (PAICU) will undergo a name, symbol, and CUSIP number change. These actions will become effective on Tuesday, January 11, 2022.

The details regarding the corporate name, symbol, and CUSIP changes are as follows:

Current Company Name/Issue: Petra Acquisition, Inc. Common Stock
New Company Name/Issue: Revelation Biosciences, Inc. Common Stock
Current CUSIP: 716421102
New CUSIP: 76135L101
Current Symbol: PAIC
New Symbol: REVB
Marketplace Effective Date: January 11, 2022

Current Company Name/Issue: Petra Acquisition, Inc. Warrant
New Company Name/Issue: Revelation Biosciences, Inc. Warrant expiring 01/10/2027
Current CUSIP: 716421110
New CUSIP: 76135L119
Current Symbol: PAICW
New Symbol: REVBW
Marketplace Effective Date: January 11, 2022

Current Company Name/Issue: Petra Acquisition, Inc. Unit
New Company Name/Issue: Revelation Biosciences, Inc. Unit
Current CUSIP: 716421201
New CUSIP: 76135L200
Current Symbol: PAICU
New Symbol: REVBU
Marketplace Effective Date: January 11, 2022

If you would like to register as a market maker in REVB, REVBW, or REVBU, contact Nasdaq Trading Services at +1 212 231 5100.



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