Statement of Changes in Beneficial Ownership (4)

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 OF SECURITIES

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3235-0287

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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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/YYYY) 10/11/2021
(Street) SEATTLE, WA 98104-1050 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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 Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		7. Title and Amount of Securities Underlying Derivative Security (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)			562500.0000	(1)	(1)	Class A Common Stock	562500.0000 (2)	$0.0000	2737500.0000	I	By Cascadia Acquisition Sponsor LLC (3)

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.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Butler Michael Joseph 1000 2ND AVENUE, SUITE 1200 SEATTLE, WA 98104-1050	X	X	Chairman of the Board

Signatures
/s/ Jamie Boyd, Attorney-in-Fact		10/13/2021
**Signature of Reporting Person		Date