UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

x

Rule 13d-1(b)

o

Rule 13d-1(c)

o

Rule 13d-1(d)

CUSIP No. 14159L103

13G

1.

Name of Reporting Person
S.S. or I.R.S. Identification No. of Above Person

Trigran Investments, Inc.

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Illinois company

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
0

6.

Shared Voting Power
2,488,913 shares of common stock

7.

Sole Dispositive Power
0

8.

Shared Dispositive Power
2,488,913 shares of common stock

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
2,488,913 shares of common stock

10.

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

11.

Percent of Class Represented by Amount in Row (9)
Approximately 9.89% as of December 31, 2012 (based on 25,154,367 shares of Common Stock issued and outstanding per CardioNet, Inc. Form 10-Q dated November 5, 2012).

12.

Type of Reporting Person
IA/CO

CUSIP No. 14159L103

13G

1.

Name of Reporting Person
S.S. or I.R.S. Identification No. of Above Person

Douglas Granat

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
U.S. Citizen

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
0

6.

Shared Voting Power
2,488,913 shares of common stock

7.

Sole Dispositive Power
0

8.

Shared Dispositive Power
2,488,913 shares of common stock

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
2,488,913 shares of common stock

10.

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

11.

Percent of Class Represented by Amount in Row (9)
Approximately 9.89% as of December 31, 2012 (based on 25,154,367 shares of Common Stock issued and outstanding per CardioNet, Inc. Form 10-Q dated November 5, 2012).

12.

Type of Reporting Person
IN/HC

CUSIP No. 14159L103

13G

1.

Name of Reporting Person
S.S. or I.R.S. Identification No. of Above Person

Lawrence A. Oberman

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
U.S. Citizen

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
0

6.

Shared Voting Power
2,488,913 shares of common stock

7.

Sole Dispositive Power
0

8.

Shared Dispositive Power
2,488,913 shares of common stock

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
2,488,913 shares of common stock

10.

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

11.

Percent of Class Represented by Amount in Row (9)
Approximately 9.89% as of December 31, 2012 (based on 25,154,367 shares of Common Stock issued and outstanding per CardioNet, Inc. Form 10-Q dated November 5, 2012).

12.

Type of Reporting Person
 IN/HC

CUSIP No. 14159L103

13G

1.

Name of Reporting Person
S.S. or I.R.S. Identification No. of Above Person

Steven G. Simon

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
U.S. Citizen

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
0

6.

Shared Voting Power
2,488,913 shares of common stock

7.

Sole Dispositive Power
0

8.

Shared Dispositive Power
2,488,913 shares of common stock

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
2,488,913 shares of common stock

10.

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

11.

Percent of Class Represented by Amount in Row (9)
Approximately 9.89% as of December 31, 2012 (based on 25,154,367 shares of Common Stock issued and outstanding per CardioNet, Inc. Form 10-Q dated November 5, 2012).

12.

Type of Reporting Person
IN/HC

CUSIP No. 14159L103

13G

Item 1(a)

Name of Issuer:
CardioNet, Inc.

Item 1(b)

Address of Issuer’s Principal Executive Offices:
227 Washington Street

Conshohocken, Pennsylvania 19428

Item 2(a)

Name of Person Filing

Item 2(b)

Address of Principal Business Office

Item 2(c)

Citizenship
Trigran Investments, Inc.

630 Dundee Road, Suite 230

Northbrook, IL 60062

Illinois company

Douglas Granat

630 Dundee Road, Suite 230

Northbrook, IL 60062

U.S. Citizen

Lawrence A. Oberman

630 Dundee Road, Suite 230

Northbrook, IL 60062

U.S. Citizen

Steven G. Simon

630 Dundee Road, Suite 230

Northbrook, IL 60062

U.S. Citizen

2(d)

Title of Class of Securities:
Common Stock, $0.001 Par Value

2(e)

CUSIP Number:
14159L103

Item 3

If this statement is filed pursuant to rules 13d-1(b), or 13d-2(b) or (c), check whether the person filing is a:

(a)

o

Broker or dealer registered under section 15 of the Exchange Act;

(b)

o

Bank as defined in section 3(a)(6) of the Exchange Act;

(c)

o

Insurance company as defined in section 3(a)(19) of the Exchange Act;

(d)

o

Investment company registered under section 8 of the Investment Company Act;

(e)

x

An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);

(f)

o

An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F);

(g)

x

A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G);

(h)

o

A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act;

(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;

(j)

o

Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

CUSIP No. 14159L103

13G

Item 4

Ownership:(1)

(a)

Amount beneficially owned:
Incorporated by reference to Item 9 of the cover page pertaining to each reporting person.

(b)

Percent of class:
Incorporated by reference to Item 11 of the cover page pertaining to each reporting person.

(c)

Number of shares as to which such person has:

(i)

Sole power to vote or to direct the vote:

Incorporated by reference to Item 5 of the cover page pertaining to each reporting person.

(ii)

Shared power to vote or to direct the vote:

Incorporated by reference to Item 6 of the cover page pertaining to each reporting person.

(iii)

Sole power to dispose or to direct the disposition of:

Incorporated by reference to Item 7 of the cover page pertaining to each reporting person.

(iv)

Shared power to dispose or to direct the disposition of:

Incorporated by reference to Item 8 of the cover page pertaining to each reporting person.

(1)  Douglas Granat, Lawrence A. Oberman and Steven G. Simon are the controlling shareholders and sole directors of Trigran Investments, Inc. and thus may be considered the beneficial owners of shares beneficially owned by Trigran Investments, Inc.

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:

Owners of accounts managed by Trigran Investments, Inc. have or may have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, securities held in their accounts.  Except as described below, no such account has such power with respect to more than five percent of the class of securities to which this Schedule 13G relates.

Trigran Investments, Inc. provides investment advisory services to Trigran Investments, L.P. , a private investment partnership for which Trigran Investments, Inc. has sole investment discretion and voting authority.  Trigran Investments, L.P. beneficially owns more than five percent of the class of securities to which this Schedule 13G relates and has separately filed a Schedule 13G to disclose its holdings.

Item 7

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company:

Not Applicable.

Item 8

Identification and Classification of Members of the Group:

Not Applicable.

Item 9

Notice of Dissolution of Group:

Not Applicable.

CUSIP No. 14159L103

13G

Item 10

Certification:

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.

TRIGRAN INVESTMENTS, INC.

By:

/s/ Lawrence A. Oberman

Name:

Lawrence A. Oberman

Title:

Executive Vice President and Director

/s//Douglas Granat

Douglas Granat

/s/ Lawrence A. Oberman

Lawrence A. Oberman

/s/ Steven G. Simon

Steven G. Simon

CUSIP No. 14159L103

13G

INDEX TO EXHIBITS

PAGE

EXHIBIT 1: Agreement to Make a Joint Filing

10