Discovery Group Boosts Stake In Tubemogul Inc (TUBE)

Page 3 of 9 – SEC Filing

CUSIP No. 898570106
1. Names of Reporting Persons.
Discovery Group I, LLC
2. Check the Appropriate Box if a Member of a Group (See Instructions)
(a)  ¨
(b)  ¨
3. SEC Use Only
4. Source of Funds (See Instructions)
AF
5. Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)     ¨
6. Citizenship or Place of Organization
Delaware
Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With
7. Sole Voting Power
None.
8. Shared Voting Power
2,313,536
9. Sole Dispositive Power
None.
10. Shared Dispositive Power
2,313,536
11. Aggregate Amount Beneficially Owned by Each Reporting Person
2,313,536
12. Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)   ¨
13. Percent of Class Represented by Amount in Row (11)
6.5%
14. Type of Reporting Person (See Instructions)
IA

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