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

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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(Print or Type Responses)
1. Name and Address of Reporting Person *
Losak Joseph C. II
  2. Issuer Name and Ticker or Trading Symbol
CIRCOR INTERNATIONAL INC [CIR] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP Finance, Controller, PAO
(Last)
(First)
(Middle)
30 CORPORATE DRIVE, SUITE 200		 3. Date of Earliest Transaction (Month/Day/Year)
10/18/2023
(Street)

BURLINGTON, MA 01803		 4. If Amendment, Date Original Filed (Month/Day/Year)
 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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

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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 (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 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
(Month/Day/Year) 		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
Restricted Stock Unit (MSP) $ 0 10/18/2023   D(1)(2)(3)     266 03/17/2026(1)(2)(3) 03/17/2033 Common Stock 266 $ 0 0 D  
Restricted Stock Unit $ 0 10/18/2023   D(4)     2,160 03/17/2024(4) 03/17/2033 Common Stock 2,160 $ 0 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Losak Joseph C. II
30 CORPORATE DRIVE, SUITE 200
BURLINGTON, MA 01803		       VP Finance, Controller, PAO  

Signatures

 /s/ Paul Caron, their attorney in fact   10/18/2023
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) The Restricted Stock Units ("RSUs") grant was issued pursuant to a provision of the CIRCOR Management Stock Purchase Plan ("MSPP") whereby certain executives may make an advance election to receive RSUs in lieu of a specified percentage or dollar amount of that executives' annual incentive cash bonus under the bonus plan applicable to the executive. The RSUs were issued in whole units at a 33% discount from fair market value of CIRCOR's common stock on the date the underlying bonus is determined and generally vest 3 years from the date of the grant, at which time the RSUs convert into shares of common stock on a (continued in Footnote 2)
(2) one-for-one basis unless the executive previously elected a longer deferral period. Pursuant to the Agreement and Plan of Merger dated June 5, 2023 (as amended on June 26, 2023 by Amendment No. 1 to Agreement and Plan of Merger, as further amended on June 29, 2023 by Amendment No. 2 to Agreement and Plan of Merger, the "Merger Agreement"), by and among CIROCR International, Inc. ("CIRCOR"), Cube BidCo, Inc., a Delaware corporation ("Parent"), and Cube Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent, pursuant to which Cube Merger Sub, Inc. merged with and into CIRCOR, with CIRCOR remaining as the surviving corporation (the "Surviving Corporation"), (Continued in Footnote 3)
(3) at the effective time of the Merger (the "Effective Time"), each unvested RSU was canceled and converted into a grant of restricted stock units in the Surviving Corporation (a "Replacement RSU"), which Replacement RSU will vest no later than the nine-month anniversary of the Effective Date assuming continued employment as of such date. Such Replacement RSUs will be settled only in cash.
(4) The RSUs entitled the Reporting Person to receive shares of CIRCOR common stock in equal installments of one-third of the original RSU grant on each of the first three anniversaries of the grant date. The RSUs automatically convert into shares of common stock on a one-for-one basis at no conversion cost to the Reporting Person. Pursuant to the Merger Agreement, as of the Effective Time, each unvested RSU was canceled and converted into a grant of Replacement RSUs, which Replacement RSU will vest at the same time and on the same terms and conditions as the unvested RSU for which such Replacement RSU was exchanged would have vested pursuant to its terms. Such Replacement RSUs will be settled only in cash.

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