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x |
Rule 13d-1(b) |
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¨ |
Rule 13d-1(c) |
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¨ |
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. |
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 | ||||
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5. |
SOLE VOTING POWER |
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NUMBER OF |
1285275 |
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SHARES |
6. |
SHARED VOTING POWER |
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BENEFICIALLY |
||||
OWNED BY |
-0- |
|||
EACH |
7. |
SOLE DISPOSITIVE POWER |
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REPORTING | ||||
PERSON |
1285275 |
|||
WITH |
8. |
SHARED DISPOSITIVE POWER |
||
|
-0- |
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9. |
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON | |||
1285275 |
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|||
10. |
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* | |||
|
o | |||
11. |
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) | |||
10.00 |
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|||
12. |
TYPE OF REPORTING PERSON* | |||
BD, IA |
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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: |
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(a) |
x |
Broker or dealer registered under Section 15 of the Exchange Act. |
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(b) |
¨ |
Bank as defined in Section 3(a)(6) of the Exchange Act. |
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(c) |
¨ |
Insurance company as defined in Section 3(a)(19) of the Exchange Act. |
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(d) |
¨ |
Investment company registered under Section 8 of the Investment Company Act. |
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(e) |
x |
An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E); |
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(f) |
¨ |
An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F); |
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(g) |
¨ |
A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G); |
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(h) |
¨ |
A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act; |
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(i) |
¨ |
A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act; |
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(j) |
¨ |
Group, in accordance with Rule 13d-1(b)(1)(ii)(J). |
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(a) |
Amount beneficially owned: |
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(b) |
Percent of class: |
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(c) |
Number of shares as to which such person has: |
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(i) |
Sole power to vote or to direct the vote |
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(ii) |
Shared power to vote or to direct the vote |
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(iii) |
Sole power to dispose or to direct the disposition of |
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(iv) |
Shared power to dispose or to direct the disposition of |
Item 5. |
Ownership of Five Percent or Less of a Class. |
Item 7. |
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person. |
August 7, 2009 | |
(Date) | |
/s/ Michelle Seitz | |
(Signature) | |
Principal & Manager of Investment Services | |
(Name/Title) |