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. 14159L103

13G

1.

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

Trigran Investments, L.P.

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 limited partnership

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
0

6.

Shared Voting Power
1,251,813 shares of common stock

7.

Sole Dispositive Power
0

8.

Shared Dispositive Power
1,251,813 shares of common stock

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
1,251,813 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 5.1% as of March 19, 2012 (based on 24,550,398 shares of Common Stock issued and outstanding per CardioNet, Inc. Form 10-K dated February 23, 2012).

12.

Type of Reporting Person
PN

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, L.P.

630 Dundee Road, Suite 230

Northbrook, IL 60062

Illinois limited partnership

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)

o

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)

o

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

A non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J);

(k)

o

Group, in accordance with Rule 13d–1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with Rule 240.13d–1(b)(1)(ii)(J), please specify the type of institution:____________________________

CUSIP No. 14159L103

13G

Item 4

Ownership:

(a)

Amount beneficially owned:   

Incorporated by reference to Item 9 of the cover page.

(b)

Percent of class:   

Incorporated by reference to Item 11 of the cover page.

(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.

(ii)

Shared power to vote or to direct the vote:    

Incorporated by reference to Item 6 of the cover page.

(iii)

Sole power to dispose or to direct the disposition of:   

Incorporated by reference to Item 7 of the cover page.

(iv)

Shared power to dispose or to direct the disposition of:   

Incorporated by reference to Item 8 of the cover page.

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 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.

By:

/s/ Lawrence A. Oberman

Name:

Lawrence A. Oberman

Title:

Executive Vice President and Director of Trigran Investments, Inc.,
the General Partner of Trigran Investments, L.P.