UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

o

Rule 13d-1(b)

x

Rule 13d-1(c)

o

Rule 13d-1(d)

CUSIP No. 116794108

1.

Names of Reporting Persons
Isolde Laukien-Kleiner

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
Germany

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
17,160,160 shares

6.

Shared Voting Power
0

7.

Sole Dispositive Power
17,160,160 shares

8.

Shared Dispositive Power
0

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
17,160,160 shares

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
10.5%

12.

Type of Reporting Person (See Instructions)
IN

Item 1.

(a)

Name of Issuer
Bruker Corporation

(b)

Address of Issuer’s Principal Executive Offices
40 Manning Road
Billerica, MA 01821

Item 2.

(a)

Name of Person Filing
Isolde Laukien-Kleiner

(b)

Address of Principal Business Office or, if none, Residence
Lichtentaler Allee 68
D-76530 Baden-Baden
Germany

(c)

Citizenship
German citizen and resident

(d)

Title of Class of Securities
Common Stock, par value $0.01 per share.

(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:
Not applicable.

(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

Group, in accordance with §240.13d-1(b)(1)(ii)(J).

Item 4.

Ownership

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

(a)

Amount beneficially owned:    17,160,160 shares

(b)

Percent of class:    10.5%

(c)

Number of shares as to which the person has:

(i)

Sole power to vote or to direct the vote    17,160,160 shares

(ii)

Shared power to vote or to direct the vote     0

(iii)

Sole power to dispose or to direct the disposition of    17,160,160 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   o.

Not applicable.

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.

Item 10.

Certification

Not applicable.

Dated: February 27, 2008

 /s/ Isolde Laukien-Kleiner

Isolde Laukien-Kleiner