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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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 * Munch Mark 2. Issuer Name and Ticker or Trading Symbol BRUKER CORP [ BRKR ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable)_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
Exec VP&Pres Bruker Nano Inc.
(Last)         (First)         (Middle)
BRUKER CORPORATION, 40 MANNING ROAD
3. Date of Earliest Transaction (MM/DD/YYYY)
9/16/2019
(Street)
BILLERICA, MA 01821
(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
Common Stock  9/16/2019    M    15059  A $20.04  96063  D   
Common Stock  9/16/2019    M    16144  A $20.68  112207  D   
Common Stock  9/16/2019    M    16000  A $19.82  128207  D   
Common Stock  9/16/2019    S    47203  D $42.8652 (1) 81004  D   

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
Stock Option (Right to Buy)  $20.04  9/16/2019    M        15059    (2) 8/30/2023  Common Stock  15059  $0  0  D   
Stock Option (Right to Buy)  $20.68  9/16/2019    M        16144    (3) 8/8/2024  Common Stock  16144  $0  0  D   
Stock Option (Right to Buy)  $19.82  9/16/2019    M        16000    (4) 8/7/2025  Common Stock  16000  $0  0  D   

Explanation of Responses:
(1)  The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $42.74 to $43.045, inclusive. The reporting person undertakes to provide to Bruker Corporation, any security holder of Bruker Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
(2)  The option vested in four approximately equal annual installments on August 30, 2014, 2015, 2016 and 2017.
(3)  The option vested in four approximately equal annual installments on August 8, 2015, 2016, 2017 and 2018.
(4)  The option vested in four approximately equal annual installments on August 7, 2016, 2017, 2018 and 2019.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Munch Mark
BRUKER CORPORATION
40 MANNING ROAD
BILLERICA, MA 01821


Exec VP&Pres Bruker Nano Inc.

Signatures
/s/ Michael Rich, Attorney-in-Fact 9/17/2019
**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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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