What changed in this filing

/stocks — the workspaceLOADING

Item 5. Other Information

2021-10-29 compared with 2021-08-23 · 50 added, 32 removed, 16 unchanged (84% of the section changed)

OTHER INFORMATION

Agreement and Plan of Merger dated as of August 29, 2021, by and among Petra Acquisition Inc., Petra Acquisition Merger Inc.

and Revelation Biosciences, Inc.

Certificate of Incorporation(2)

Second Amended and Restated Certificate of Incorporation(1)

Specimen Unit Certificate.(2)

Specimen Common Stock Certificate.(2)

Specimen Warrant Certificate.(2)

Warrant Agreement, dated October 7, 2020, between Continental Stock Transfer & Trust Company and the Company(1)

Description of Registrant’s Securities.(3)

Investment Management Trust Agreement, dated October 7, 2020, between Continental Stock Transfer & Trust Company and the Company.(1)

Escrow Agreement, dated October 7, 2020, by and among the Company, Continental Stock Transfer & Trust Company and the Company’s Initial Stockholders.(1)

Registration Rights Agreement, dated October 7, 2020, between the Company and Investors.(1)

Subscription Agreement, dated October 7, 2020, between the Company and Petra Investment Holdings LLC(1)

Business Combination Marketing Agreement, dated October 7, 2020, by and among the Company, LifeSci Capital LLC, Ladenburg Thalmann & Co.

Amended and Restated Certificate of Incorporation(1)

Amendment to the Second Amended and Restated Certificate of Incorporation of Petra Acquisition Inc., dated October 8, 2021

Certificate of Correction to the Amendment to the Second Amended and Restated Certificate of Incorporation of Petra Acquisition, Inc.

Amended and Restated Bylaws

Unit Certificate.(2)

Common Stock Certificate.(2)

Warrant Certificate.(2)

Agreement, dated October 7, 2020, between Continental Stock Transfer & Trust Company and the Company(1)

of Registrant’s Securities.(3)

Management Trust Agreement, dated October 7, 2020, between Continental Stock Transfer & Trust Company and the Company.(1)

Agreement, dated October 7, 2020, by and among the Company, Continental Stock Transfer & Trust Company and the Company’s

Initial Stockholders.(1)

Rights Agreement, dated October 7, 2020, between the Company and Investors.(1)

Agreement, dated October 7, 2020, between the Company and Petra Investment Holdings LLC(1)

Combination Marketing Agreement, dated October 7, 2020, by and among the Company, LifeSci Capital LLC, Ladenburg Thalmann & Co.

Inc., Northland Securities, Inc., and Ingalls & Snyder LLC(1)

Form of Letter Agreement from each of the Registrant’s initial shareholders, officers and directors.(3)

Code of Ethics.(2)

Certification of Principal Executive Officer Pursuant to Securities Exchange Act Rules 13a-14(a) and 15(d)-14(a), as adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

Certification of Principal Financial Officer Pursuant to Securities Exchange Act Rules 13a-14(a) and 15(d)-14(a), as adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

Certification of Principal Executive Officer Pursuant to 18 U.S.C.

of Letter Agreement from each of the Registrant’s initial shareholders, officers and directors.(3)

Engagement Letter Agreement dated November 3, 2020 by and between the Registrant and LifeSci Capital LLC.

Amendment, dated September 17, 2021, to the Engagement Letter Agreement dated November 3, 2020 by and between the Registrant and LifeSci Capital LLC

Engagement Letter Agreement dated November 3, 2020 by and between the Registrant and LifeSci Capital LLC.

Promissory Note dated September 17, 2021 from the Registrant to Pine Valley Investments LLC

Note Cancellation Agreement by and between the Registrant and Pine Valley Investments, LLC

Promissory Note, dated as of October 13, 2021 from the Registrant to T3 Investments, LLC

Promissory Note, dated as of October 13, 2021 from the Registrant to Miro Kesic

Promissory Note, dated as of October 13, 2021 from the Registrant to Jared Solomon

of Ethics.(2)

Certification

of Principal Executive Officer Pursuant to Securities Exchange Act Rules 13a-14(a) and 15(d)-14(a), as adopted Pursuant to Section

302 of the Sarbanes-Oxley Act of 2002

Certification

of Principal Financial Officer Pursuant to Securities Exchange Act Rules 13a-14(a) and 15(d)-14(a), as adopted Pursuant to Section

302 of the Sarbanes-Oxley Act of 2002

Certification

of Principal Executive Officer Pursuant to 18 U.S.C.

Section 1350, as adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of

Certification of Principal Financial Officer Pursuant to 18 U.S.C.

Certification

of Principal Financial Officer Pursuant to 18 U.S.C.

Section 1350, as adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of

Inline XBRL Instance Document

Inline XBRL Taxonomy Extension Calculation Linkbase Document

Inline XBRL Taxonomy Extension Calculation

Linkbase Document

Inline XBRL Taxonomy Extension Schema Document

Inline XBRL Taxonomy Extension Definition Linkbase Document

Inline XBRL Taxonomy Extension Labels Linkbase Document

Inline XBRL Taxonomy Extension Presentation Linkbase Document

Cover Page Interactive Data File (embedded within the Inline XBRL document)

(1) Previously

Inline XBRL Taxonomy Extension Definition

Linkbase Document

Inline XBRL Taxonomy Extension Labels Linkbase

Inline XBRL Taxonomy Extension Presentation

Linkbase Document

Cover Page Interactive Data File (embedded

within the Inline XBRL document)

filed as an exhibit to our Current Report on Form 8-K filed on October 13, 2020.

Previously filed as an

exhibit to our Form S-1, filed on September 21, 2020

Previously filed as an

exhibit to our Form 10-K, filed on March 31, 2021

** Furnished.

filed as an exhibit to our Form S-1, filed on September 21, 2020

filed as an exhibit to our Form 10-K, filed on March 31, 2021

to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by

the undersigned thereunto duly authorized.

PETRA ACQUISITION, INC.

August 23, 2021

ACQUISITION, INC.

Andreas Typaldos

1 unchanged sentence

( Principal Executive Officer )

August 23, 2021

Sean Fitzpatrick

October 29, 2021

Sean Fitzpatrick

2 unchanged sentences

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.

What changed 10-Q

Item 5. Other Information