- Statement of Ownership (SC 13G)
February 05 2010 - 6:01AM
Edgar (US Regulatory)
UNITED
STATES
SECURITIES
AND EXCHANGE COMMISSION
WASHINGTON,
DC 20549
SCHEDULE
13G
Under the
Securities Exchange Act of 1934
(Amendment
No. )*
CARDIONET
|
(Name
of Issuer)
|
|
Common
|
(Title
of Class of Securities)
|
|
14159L10
|
(CUSIP
Number)
|
|
December 31, 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:
£
Rule
13d-1(b)
£
Rule
13d-1(c)
T
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
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).
1.
|
NAME
OF REPORTING PERSONS
|
|
|
I.R.S.
IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
|
|
|
|
|
William
Blair & Company, L.L.C.
|
|
36-2214610
|
|
2.
|
CHECK
THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
|
|
|
|
|
|
|
(a)
£
|
|
|
(b)
£
|
3.
|
SEC
USE ONLY
|
|
|
|
|
|
|
|
4.
|
CITIZENSHIP
OR PLACE OF ORGANIZATION
|
|
|
|
|
222
W Adams
|
|
Chicago,
IL 60606
|
|
NUMBER
OF
|
5.
|
SOLE
VOTING POWER
|
|
|
|
SHARES
|
1795869
|
BENEFICIALLY
|
6.
|
SHARED
VOTING POWER
|
|
|
|
OWNED
BY
|
-0-
|
EACH
|
7.
|
SOLE
DISPOSITIVE POWER
|
|
|
|
REPORTING
|
1795869
|
PERSON
|
8.
|
SHARED
DISPOSITIVE POWER
|
|
|
|
WITH
|
-0-
|
9.
|
AGGREGATE
AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
|
|
|
|
|
1795869
|
|
10.
|
CHECK
BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES*
|
|
|
|
|
|
|
£
|
11.
|
PERCENT
OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
|
|
|
|
|
7.52%
|
|
12.
|
TYPE
OF REPORTING PERSON*
|
|
|
|
|
BD,
IA
|
|
*SEE
INSTRUCTIONS BEFORE FILLING OUT!
Item
1(a).
|
Name
of Issuer:
|
CARDIONET
Item
1(b).
|
Address
of Issuer's Principal Executive
Offices:
|
227
Washington St
Conshohocken,
PA 19428-2086
Item
2(a).
|
Name
of Person Filing:
|
William
Blair & Company, L.L.C.
Item
2(b).
|
Address
of Principal Business Office, or if None,
Residence:
|
222 W
Adams
Chicago,
IL 60606
U.S.A.
Item
2(d).
|
Title
of Class of Securities:
|
Common
14159L10
Item
3.
|
If
This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b) or (c),
Check Whether the Person Filing is
a:
|
|
(a)
T
|
Broker
or dealer registered under Section 15 of the Exchange
Act.
|
|
(b)
£
|
Bank
as defined in Section 3(a)(6) of the Exchange
Act.
|
|
(c)
£
|
Insurance
company as defined in Section 3(a)(19) of the Exchange
Act.
|
|
(d)
£
|
Investment
company registered under Section 8 of the Investment Company
Act.
|
|
(e)
T
|
An
investment adviser in accordance with Rule
13d-1(b)(1)(ii)(E);
|
|
(f)
£
|
An
employee benefit plan or endowment fund in accordance with Rule
13d-1(b)(1)(ii)(F);
|
|
(g)
£
|
A
parent holding company or control person in accordance with Rule
13d-1(b)(1)(ii)(G);
|
|
(h)
£
|
A
savings association as defined in Section 3(b) of the Federal Deposit
Insurance Act;
|
|
(i)
£
|
A
church plan that is excluded from the definition of an investment company
under Section 3(c)(14) of the Investment Company
Act;
|
|
(j)
£
|
Group,
in accordance with Rule
13d-1(b)(1)(ii)(J).
|
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:
|
1795869
7.52%
|
(c)
|
Number
of shares as to which such person
has:
|
|
(i)
|
Sole
power to vote or to direct the vote
|
1795869
|
(ii)
|
Shared
power to vote or to direct the vote
|
-0-
|
(iii)
|
Sole
power to dispose or to direct the disposition
of
|
1795869
|
(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
.
Item
6.
|
Ownership
of More Than Five Percent on Behalf of Another
Person.
|
Item
7.
|
Identification
and Classification of the Subsidiary Which Acquired the Security Being
Reported on by the Parent Holding Company or Control
Person.
|
Item
8.
|
Identification
and Classification of Members of the
Group.
|
Item
9.
|
Notice
of Dissolution of Group.
|
By
signing below I certify that, to the best of my knowledge and belief, the
securities referred to above were acquired and are held in the ordinary course
of business and were not acquired and 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 such 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.
|
February 5, 2010
|
|
|
(Date)
|
|
|
|
|
|
|
|
|
/s/ Michelle Seitz
|
|
|
(Signature)
|
|
|
|
|
|
|
|
|
Principal & Manager of Investment
Services
|
|
|
(Name/Title)
|
|
The
original statement shall be signed by each person on whose behalf the statement
is filed or his authorized representative. If the statement is signed on behalf
of a person by his authorized representative other than an executive officer or
general partner of the filing person, evidence of the representative’s authority
to sign on behalf of such person shall be filed with the statement, provided,
however, that a power of attorney for this purpose which is already on file with
the Commission may be incorporated by reference. The name and any title of each
person who signs the statement shall be typed or printed beneath his
signature.
NOTE:
Schedules filed in paper format shall include a signed original and five copies
of the schedule, including all exhibits. See 240.13d-7 for other parties for
whom copies are to be sent.
Attention:
Intentional misstatements or omissions of fact constitute Federal criminal
violations (See 18 U.S.C. 1001)
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