Sec Form 4 Filing - Butler Michael Joseph @ Cascadia Acquisition Corp. - 2021-10-11

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Butler Michael Joseph 2. Issuer Name and Ticker or Trading Symbol Cascadia Acquisition Corp. [ CCAIU] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chairman of the Board (Last) (First) (Middle) 1000 2ND AVENUE, SUITE 1200 3. Date of Earliest Transaction (MM/DD/YY) 10/11/2021 (Street) SEATTLE, WA98104-1050 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Class B Common Stock ( 1 ) 10/11/2021 D( 2 ) 562,500 ( 1 ) ( 1 ) Class A Common Stock 562,500 ( 2 ) $ 0 2,737,500 I By Cascadia Acquisition Sponsor LLC ( 3 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Butler Michael Joseph 1000 2ND AVENUE, SUITE 1200 SEATTLE, WA98104-1050 X X Chairman of the Board Signatures /s/ Jamie Boyd, Attorney-in-Fact 10/13/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )As described in the issuer's registration statement on Form S-1 (File No. 333-258515) (the "Registration Statement") under the heading "Description of Securities-Founders Shares," the shares of Class B common stock, par value $0.0001 per share, of the issuer will automatically convert into shares of Class A common stock, par value $0.0001 per share, of the issuer upon the consummation of the issuer's initial business combination on a one-for-one basis, subject to certain adjustment, and have no expiration date. ( 2 )Cascadia Acquisition Sponsor LLC (the "Sponsor") forfeited 562,500 shares of Class B common stock to the issuer for no consideration, which was exempted pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934, as amended, in connection with the underwriters' election not to exercise their over-allotment option. ( 3 )As a manager of the Sponsor, the reporting person may be deemed to share beneficial ownership of the shares of Class B common stock held by the Sponsor. The reporting person disclaims any beneficial ownership of any shares held by the Sponsor except to the extent of his ultimate pecuniary interest.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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