FORM 4 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
or Section 30(h) of the Investment Company Act of 1940
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 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person *
Kastner Marc A
(Last) (First) (Middle)
BRUKER CORPORATION
40 MANNING ROAD
(Street)
BILLERICA MA 01821
(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
BRUKER CORP [ BRKR ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
11/24/2021
4. If Amendment, Date of 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
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
Common Stock 11/24/2021   M   10,000 A $ 19.9 21,146 D  
Common Stock 11/24/2021   S   10,000 D $ 76.86 11,146 D  
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 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: 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
Stock Option (Right to Purchase) $ 19.9 11/24/2021   M     10,000   (1) 05/28/2025 Common Stock 10,000 $ 0 0 D  
Explanation of Responses:
1. The stock option granted to the Reporting Person on May 28, 2015 (the "Original Grant Date") vested in equal installments on the first, second and third anniversaries of the Original Grant Date.
Sara Hussain, Attorney-in-Fact 11/29/2021
** Signature of Reporting Person Date
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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EXHIBIT 24

                               POWER OF ATTORNEY

      KNOW  ALL  BY  THESE PRESENTS, that the undersigned hereby constitutes and
appoints each of Sara Hussain, Michael Simone, and Michael Rich, signing singly,
as his/her true and lawful attorney-in-fact to:

      (1)   execute  for  and on behalf of the undersigned, in the undersigned's
            capacity  as a director of Bruker Corporation (the "Company"), Forms
            3,  4,  and  5  in  accordance  with Section 16(a) of the Securities
            Exchange Act of 1934 and the rules thereunder and any other forms or
            reports  the  undersigned may be required to file in connection with
            the   undersigned's   ownership,   acquisition,  or  disposition  of
            securities of the Company;

      (2)   do and perform any and all acts for and on behalf of the undersigned
            which may be necessary or desirable to complete and execute any such
            Form  3, 4, or 5, or other form or report, and timely file such form
            or  report  with the U.S. Securities and Exchange Commission and any
            stock exchange or similar authority; and

      (3)   take  any other action of any type whatsoever in connection with the
            foregoing  which, in the opinion of such attorney-in-fact, may be of
            benefit  to,  in  the  best interest of, or legally required by, the
            undersigned, it being understood that the documents executed by such
            attorney-in-fact  on  behalf  of  the  undersigned, pursuant to this
            Power  of  Attorney,  shall  be  in such form and shall contain such
            terms  and conditions as such attorney-in-fact may approve in his or
            her discretion.

      The undersigned hereby grants to each such attorney-in-fact full power and
authority  to  do and perform each and every act and thing whatsoever requisite,
necessary, and proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could  do  if personally present, with full power of substitution or revocation,
hereby  ratifying  and  confirming all that such attorney-in-fact, or his or her
substitute  or  substitutes,  shall lawfully do or cause to be done by virtue of
this Power of Attorney and the rights and powers herein granted. The undersigned
acknowledges  that  no such attorney-in-fact, in serving in such capacity at the
request  of  the  undersigned,  is  hereby  assuming  any  of  the undersigned's
responsibilities  to  comply  with  Section  13 and Section 16 of the Securities
Exchange Act of 1934 and the rules thereunder, as amended.

      This Power of Attorney shall remain in full force and effect until revoked
by   the   undersigned   in   a   signed  writing  delivered  to  the  foregoing
attorneys-in-fact.

      IN  WITNESS  WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 23rd day of September 2020.

/s/Marc Kastner
-----------------------------------------
September 23, 2020