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CUSIP No. 81724W 10 4

Page 1 of 8 Pages

 

 

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_____________________

 

SCHEDULE 13G

(Rule 13d-102)

 

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO RULES 13d-1(b),(c) AND (d) AND AMENDMENTS THERETO FILED

PURSUANT TO RULE 13d-2(b)

(Amendment No. )1

 

SenoRx, Inc.

(Name of Issuer)

 

Common Stock, $.001 par value

(Title of Class of Securities)

 

81724W 10 4

(CUSIP Number)

 

April 3, 2007

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)

 

o Rule 13d-1(c)

 

x Rule 13d-1(d)

 

 

 

_______________________

 

1The 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 disclosures provided in a prior cover page. The information required on 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 or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act.

CUSIP No. 81724W 10 4

Page 2 of 8 Pages

 

1)

Name of Reporting Person

I.R.S. Identification

No. of Above Person

(Entities Only)

Domain Partners IV, L.P.

2)

Check the Appropriate Box

if a Member of a Group

(a) x

(b) o

3)

SEC Use Only

 

4)

Citizenship or Place

of Organization

Delaware

Number of

Shares Beneficially

Owned by Each

Reporting Person

With

5)

Sole Voting
Power

1,344,783 shares of Common Stock

6)

Shared Voting
Power

 

-0-

7)

Sole Dispositive
Power

1,344,783 shares of Common Stock

8)

Shared Dispositive Power

 

-0-

9)

Aggregate Amount Beneficially Owned by Each Reporting Person

1,344,783 shares of Common Stock

10)

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

 

11)

Percent of Class Represented by Amount in Row (9)

7.8%

12)

Type of Reporting Person

PN

 

CUSIP No. 81724W 10 4

Page 3 of 8 Pages

 

1)

Name of Reporting Person

I.R.S. Identification

No. of Above Person

(Entities Only)

DP IV Associates, L.P.

2)

Check the Appropriate Box

if a Member of a Group

(a) x

(b) o

3)

SEC Use Only

 

4)

Citizenship or Place

of Organization

Delaware

Number of

Shares Beneficially

Owned by Each

Reporting Person

With

5)

Sole Voting
Power

24,665 shares of Common Stock

6)

Shared Voting
Power

 

-0-

7)

Sole Dispositive
Power

24,665 shares of Common Stock

8)

Shared Dispositive Power

 

-0-

9)

Aggregate Amount Beneficially Owned by Each Reporting Person

24,665 shares of Common Stock

10)

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

 

11)

Percent of Class Represented by Amount in Row (9)

0.1%

12)

Type of Reporting Person

PN

 

CUSIP No. 81724W 10 4

Page 4 of 8 Pages

 

Schedule 13G

 

Item 1(a)

–

Name of Issuer: SenoRx, Inc.

 

Item 1(b)

–

Address of Issuer’s Principal Executive Offices:

 

 

11 Columbia, Suite A

 

Aliso Viejo, CA 92656

 

Item 2(a)

–

Name of Person Filing:

 

This statement is being filed by Domain Partners IV, L.P., a Delaware limited partnership (“Domain IV”), and DP IV Associates, L.P., a Delaware limited partnership (“DP IV A”) (together, the “Reporting Persons”).

 

Item 2(b)

–

Address of Principal Business Office:

 

One Palmer Square

Princeton, NJ 08542

 

Item 2(c)

–

Place of Organization:

 

Domain IV: Delaware

DP IV A: Delaware

 

Item 2(d)

–

Title of Class of Securities:

 

Common Stock, $.001 par value

 

Item 2(e)

–

CUSIP Number: 81724W 10 4

 

Item 3

–

Statements Filed Pursuant to Rules 13d-1(b) or 13d-2(b):

 

Not applicable.

 

Item 4

–

Ownership.

 

 

(a)

Amount Beneficially Owned:

 

 

Domain IV: 1,344,783 shares of Common Stock

 

DP IV A: 24,665

 

 

(b) Percent of Class:

 

 

Domain IV: 7.8%

CUSIP No. 81724W 10 4

Page 5 of 8 Pages

 

 

DP IV A: 0.1%

 

 

(c)

Number of shares as to which such person has:

 

 

(i)

sole power to vote or to direct the vote:

 

 

Domain IV: 1,344,783 shares of Common Stock

 

DP IV A: 24,665 shares of Common Stock

 

 

(ii) shared power to vote or to direct the vote: -0-

 

 

(iii) sole power to dispose or to direct the disposition of:

 

 

Domain IV: 1,344,783 shares of Common Stock

 

DP IV A: 24,665 shares of Common Stock

 

 

(iv) shared power to dispose or to direct the disposition of: -0-

 

Item 5

–

Ownership of Five Percent or Less of a Class:

 

 

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 Company:

 

Not applicable.

 

Item 8 –

Identification and Classification of Members of the Group:

 

See Exhibit 2.

 

Item 9 –

Notice of Dissolution of Group:

 

Not applicable.

 

Item 10 –

Certification:

 

Not applicable.

CUSIP No. 81724W 10 4

Page 6 of 8 Pages

 

 

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.

 

 

DOMAIN PARTNERS IV, L.P.

 

By:

One Palmer Square Associates

IV, L.L.C., General Partner

 

 

By:

/s/ Kathleen K. Schoemaker

 

 

Managing Member

 

DP IV ASSOCIATES, L.P.

 

By:

One Palmer Square Associates IV, L.L.C., General Partner

 

By:

/s/ Kathleen K. Schoemaker

 

 

Managing Member

 

Date: January 23, 2008

CUSIP No. 81724W 10 4

Page 7 of 8 Pages

 

                EXHIBIT 2

 

AGREEMENT OF

DOMAIN PARTNERS IV, L.P.

AND

DP IV ASSOCIATES, L.P.

PURSUANT TO RULE 13d-1(f)

 

The undersigned hereby agree that the Information Statement on Schedule 13G to which this Agreement is annexed as Exhibit 1 is filed on behalf of each of them in accordance with provisions of 13d-1(f) under the Securities Exchange Act of 1934, as amended.

 

 

DOMAIN PARTNERS IV, L.P.

 

By:

One Palmer Square Associates

IV, L.L.C., General Partner

 

 

By:

/s/ Kathleen K. Schoemaker

 

 

Managing Member

 

DP IV ASSOCIATES, L.P.

 

By:

One Palmer Square Associates IV, L.L.C., General Partner

 

By:

/s/ Kathleen K. Schoemaker

 

 

Managing Member

 

 

Date: January 23, 2008

CUSIP No. 81724W 10 4

Page 8 of 8 Pages

 

 

EXHIBIT 2

 

Identification and Classification

       of Members of the Group  

 

Domain Partners IV, L.P. and DP IV Associates, L.P. are filing this statement on Schedule 13G as a group.

 

Domain Partners IV, L.P. is a Delaware limited partnership. Its sole general partner is One Palmer Square Associates IV, L.L.C., a Delaware limited liability company.

 

DP IV Associates, L.P. is a Delaware limited partnership. Its sole general partner is One Palmer Square Associates IV, L.L.C., a Delaware limited liability company.