BRUKER CORP — Major Shareholding Notification 2009

Oct 7, 2009

SC 13G/A 1 a09-30054_1sc13ga.htm SC 13G/A

| UNITED

STATES
SECURITIES
AND EXCHANGE COMMISSION
Washington,
D.C. 20549

SCHEDULE 13G/A

Under the Securities Exchange Act of 1934 (Amendment No. 10)*

Bruker Corporation

(Name of Issuer)

Common Stock

(Title of Class of Securities)

116794108

(CUSIP Number)

September 28, 2009

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

o	Rule 13d-1(b)
x	Rule 13d-1(c)
o	Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

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CUSIP No. 116794108 — 1	Name of Reporting Persons Marc Laukien
2	Check the Appropriate Box
if a Member of a Group (See Instructions)
	(a)	o
	(b)	o
3	SEC Use Only
4	Citizenship or Place of
Organization United States
Number of Shares Beneficially Owned by Each Reporting Person With	5	Sole Voting Power 4,031,712 shares
	6	Shared Voting Power 0
	7	Sole Dispositive Power 4,031,712 shares
	8	Shared Dispositive Power 0
9	Aggregate Amount
Beneficially Owned by Each Reporting Person 4,031,712 shares
10	Check Box if the Aggregate
Amount in Row (9) Excludes Certain Shares (See Instructions) o
11	Percent of Class
Represented by Amount in Row (9) 2.5%
12	Type of Reporting Person
(See Instructions) IN

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Item 1	(a).	Name of Issuer: Bruker Corporation
Item 1	(b).	Address of Issuer’s
Principal Executive Offices: 40 Manning Road Billerica, MA 01821
Item 2	(a).	Name of Person Filing: Marc Laukien
Item 2	(b).	Address of Principal
Business Office or, if none, Residence: 809 Harbour Isles Ct. North Palm Beach, FL 33410
Item 2	(c).	Citizenship: United States
Item 2	(d).	Title of Class of Securities: Common Stock, par value $0.01 per share.
Item 2	(e).	CUSIP Number: 116794108
Item 3.		If this statement is filed pursuant
to §§240.13d-1(b), or 240.13d-2(b) or (c), check whether the person filing is a:
	(a)	o	Broker or dealer
registered under section 15 of the Act (15 U.S.C. 78o);
	(b)	o	Bank as defined in section
3(a)(6) of the Act (15 U.S.C. 78c);
	(c)	o	Insurance company as
defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
	(d)	o	Investment company
registered under section 8 of the Investment Company Act of 1940 (15 U.S.C.
80a-8);
	(e)	o	An investment adviser in
accordance with §240.13d-1(b)(1)(ii)(E);
	(f)	o	An employee benefit plan
or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);
	(g)	o	A parent holding company
or control person in accordance with §240.13d-1(b)(1)(ii)(G);
	(h)	o	A savings association as
defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C.
1813);
	(i)	o	A church plan that is
excluded from the definition of an investment company under section 3(c)(14)
of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
	(j)	o	A non-U.S. institution, in
accordance with § 240.13d–1(b)(1)(ii)(J);
	(k)	o	Group, in accordance with
§ 240.13d–1(b)(1)(ii)(K).
	Not applicable.
	If filing for a non-U.S.
institution in accordance with §240.13d-1(b)(1)(ii)(J), please specify the
type of institution.
Not applicable.

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Item 4.	Ownership
(a)	Amount beneficially
owned: 4,031,712 shares
(b)	Percent of class: 2.5%
(c)	Number of shares as to
which such person has:
	(i)	Sole power to vote or to
direct the vote 4,031,712 shares
	(ii)	Shared power to vote or to
direct the vote 0
	(iii)	Sole power to dispose or
to direct the disposition of 4,031,712 shares
	(iv)	Shared power to dispose or
to direct the disposition of 0
Item 5.	Ownership of Five Percent or Less
of a Class
	If this statement is being filed to report the fact
that as of the date hereof the reporting person has ceased to be the
beneficial owner of more than five percent of the class of securities, check
the following x .
Item 6.	Ownership of More than Five Percent
on Behalf of Another Person
	Not applicable.
Item 7.	Identification and Classification
of the Subsidiary Which Acquired the Security Being Reported on By the Parent
Holding Company or Control Person
	Not applicable.
Item 8.	Identification and Classification
of Members of the Group
	Not applicable.
Item 9.	Notice of Dissolution of Group
	Not applicable.

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Item 10.
By signing below, I
certify that, to the best of my knowledge and belief, the securities referred
to above were not acquired and are not held for the purpose of or with the
effect of changing or influencing the control of the issuer of the securities
and were not acquired and are not held in connection with or as a participant
in any transaction having that purpose or effect.

Signature

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dated: October 6, 2009
/s/Marc Laukien
Marc
Laukien

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