Tubemogul Inc (TUBE): Discovery Group Buys More Shares of Struggling Advertiser

Michael Murphy and Daniel Donoghue‘s Discovery Group recently filed a Form 13D with the Securities and Exchange Commission, in which it reported holding 3.07 million shares of Tubemogul Inc (NASDAQ:TUBE), which account for 8.5% of the company’s outstanding stock. This represents an increase in the fund’s stake, as Discovery Group previously owned 2.71 million shares or 7.5% of the company’s outstanding stock, as per its 13D filing on August 16.

TubeMogul is a company that develops software for digital brand advertising. Over the past 12 months, the company’s stock is down by 22.53%. For the second quarter of 2016, Tubemogul Inc (NASDAQ:TUBE) disclosed a loss per share of $0.11, missing estimates of a loss per share of $0.07, and revenue of $55.4 million, also below analysts’ consensus estimate of $58.1 million.

There has been a lot of analyst ratings activity on Tubemogul’s stock recently, with many cutting their price targets on it. To begin with, First Analysis downgraded its rating on the company’s shares to ‘Equal Weight’ from ‘Overweight’ and lowered its price target on them to $11 from $17, while Piper Jaffray reiterated its ‘Overweight’ rating but reduced its price target on the stock to $17 from $23. JPMorgan Chase & Co. also lowered its price target on the stock to $17, from $20, and has an ‘Overweight’ rating on it. Meanwhile, JMP Securities downgraded its rating on Tubemogul to ‘Market Perform’ from ‘Outperform’, while Oppenheimer lowered its price target to $14 from $18 and has an ‘Outperform’ rating. Lastly, Citigroup Inc. also reduced its price target on the stock, to $15 from $18, while having a ‘Buy’ rating on it.

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The number of hedge funds in Insider Monkey’s database long the stock decreased by one during the second quarter, as at the end of June, there were seven investors long Tubemogul Inc (NASDAQ:TUBE). Anand Parekh’s Alyeska Investment Group held a position valued at $16.29 million, while Glenn Russell Dubin’s Highbridge Capital Management initiated a position worth $208,000 on June 30.

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You can access the original SEC filing by clicking here.

Ownership Summary Table

Name Sole Voting Power Shared Voting Power Sole Dispositive Power Shared Dispositive Power Aggregate Amount Owned Power Percent of Class
Discovery Equity Partners 3,071,251 3,071,251 3,071,251 8.5%
Discovery Group I 3,071,251 3,071,251 3,071,251 8.5%
Daniel J. Donoghue 3,071,251 3,071,251 3,071,251 8.5%
Michael R. Murphy 3,071,251 3,071,251 3,071,251 8.5%

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Page 1 of 9 – SEC Filing

UNITED
STATES

SECURITIES
AND EXCHANGE COMMISSION

Washington,
D.C. 20549

 

SCHEDULE
13D

(Rule
13d-101)

 

INFORMATION
TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO §
240.13d-1(a) AND AMENDMENTS THERETO FILED

PURSUANT
TO § 240.13d-2(a)

 

UNDER THE SECURITIES
EXCHANGE ACT OF 1934

(Amendment No. 3)*

 

TubeMogul, Inc.
(Name of Issuer)
Common Stock, par value $0.001 per share
(Title of Class of Securities)
898570106
(CUSIP Number)
Michael R. Murphy
Discovery Group I, LLC
300 South Wacker Drive
Suite 600
Chicago, Illinois 60606
Telephone Number: (312) 265-9600
(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)
August 29, 2016
(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule
13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e),
240.13d-1(f) or 240.13d-1(g), check the following box. ¨

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 to whom copies are
to be sent.

*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 disclosures provided in a prior cover page.

The information required on 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 (“Act”)
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).

Page 2 of 9 – SEC Filing

CUSIP No. 898570106
1.

Names of Reporting Persons.

Discovery Equity Partners, L.P.

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)

WC

5. Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)     ¨
6.

Citizenship or Place of Organization

Illinois

Number of

Shares

Beneficially

Owned by

Each

Reporting

Person With

7.

Sole Voting Power

None.

8.

Shared Voting Power

3,071,251

9.

Sole Dispositive Power

None.

7

Shared Dispositive Power

3,071,251

11.

Aggregate Amount Beneficially Owned by Each Reporting Person

3,071,251

12. Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)    ¨
13.

Percent of Class Represented by Amount in Row (11)

8.5%

14.

Type of Reporting Person (See Instructions)

PN

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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

3,071,251

9.

Sole Dispositive Power

None.

10.

Shared Dispositive Power

3,071,251

11.

Aggregate Amount Beneficially Owned by Each Reporting Person

3,071,251

12. Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)   ¨
13.

Percent of Class Represented by Amount in Row (11)

8.5%

14.

Type of Reporting Person (See Instructions)

IA

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Page 4 of 9 – SEC Filing

CUSIP No. 898570106
1.

Names of Reporting Persons.

Daniel J. Donoghue

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

United States of America

Number of

Shares

Beneficially

Owned by

Each

Reporting

Person With

7.

Sole Voting Power

None.

8.

Shared Voting Power

3,071,251

9.

Sole Dispositive Power

None.

10.

Shared Dispositive Power

3,071,251

11.

Aggregate Amount Beneficially Owned by Each Reporting Person

3,071,251

12. Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)   ¨
13.

Percent of Class Represented by Amount in Row (11)

8.5%

14.

Type of Reporting Person (See Instructions)

IN

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Page 5 of 9 – SEC Filing

CUSIP No. 898570106
1.

Names of Reporting Persons.

Michael R. Murphy

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

United States of America

Number of

Shares

Beneficially

Owned by

Each

Reporting

Person With

7.

Sole Voting Power

None.

8.

Shared Voting Power

3,071,251

9.

Sole Dispositive Power

None.

10.

Shared Dispositive Power

3,071,251

11.

Aggregate Amount Beneficially Owned by Each Reporting Person

3,071,251

12. Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)   ¨
13.

Percent of Class Represented by Amount in Row (11)

8.5%

14.

Type of Reporting Person (See Instructions)

IN

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Page 6 of 9 – SEC Filing

Item 1. Security and Issuer
This Amendment No. 3 to Schedule 13D (“Amendment No. 3”) relates to the Common Stock, par value $0.001 per share (the “Common Stock”), of TubeMogul, Inc., a Delaware corporation (the “Company”), which has its principal executive offices at 1250 53rd Street, Suite 2, Emeryville, CA 94608. This Amendment No. 3 amends and supplements, as set forth below, the information contained in items 1, 3, 5 and 6 of the Schedule 13D filed by the Reporting Persons with respect to the Company on September 4, 2015, as amended by Amendment No. 1 thereto filed by the Reporting Persons with respect to the Company on June 15, 2016, and as amended by Amendment No. 2 thereto filed by the Reporting Persons with respect to the Company on August 16, 2016 (as so amended, the “Schedule 13D”). All capitalized terms used herein but not defined herein have the meanings set forth in the Schedule 13D. Except as amended by this Amendment No. 3, all information contained in the Schedule 13D is, after reasonable inquiry and to the best of the Reporting Persons’ knowledge and belief, complete and correct as of the date of this Amendment No. 3.
Item 3. Source and Amount of Funds or Other Consideration

Item 3 of the Schedule 13D is hereby amended to read in its
entirety as follows:

The total purchase price for the 3,071,251 shares of Common
Stock beneficially owned by the Reporting Persons as of August 29, 2016 was approximately $37,957,486. The source of such funds
was the assets of Discovery Equity Partners, including proceeds of margin loans under margin loan facilities maintained in the
ordinary course of business by the Discovery Equity Partners with a broker on customary terms and conditions. Discovery Equity
Partners is the legal owner of all of the Common Stock beneficially owned by Discovery Group and Messrs. Donoghue and Murphy.

Item 5. Interest in Securities of the Issuer

Item 5 of the Schedule 13D is hereby amended to read in its
entirety as follows:

The information concerning percentages of ownership set forth
below is based on 36,220,676 shares of Common Stock outstanding as of August 1, 2016
in the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2016.

Discovery Equity Partners beneficially owns 3,071,251 shares
of Common Stock as of August 29, 2016, which represents 8.5% of the outstanding Common Stock.

Discovery Group beneficially owns 3,071,251 shares of Common
Stock as of August 29, 2016, which represents 8.5% of the outstanding Common Stock.

Mr. Donoghue beneficially owns 3,071,251 shares of Common Stock
as of August 29, 2016, which represents 8.5% of the outstanding Common Stock.

Mr. Murphy beneficially owns 3,071,251 shares of Common Stock
as of August 29, 2016, which represents 8.5% of the outstanding Common Stock..

Discovery Group is the
sole general partner of Discovery Equity Partners.  Messrs. Donoghue and Murphy are the sole managing members of Discovery
Group.  As a consequence, Discovery Group and Messrs. Donoghue and Murphy may be deemed to share beneficial ownership
of all of the shares of Common Stock owned by Discovery Equity Partners.

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Page 7 of 9 – SEC Filing

The transactions in Common Stock effected by the Reporting Persons
since those reported in the Schedule 13D filed by the Reporting Persons on August 16, 2016 are set out in Exhibit 1 hereto.

No person other than Discovery
Equity Partners
is known to any Reporting Person to have the right to receive or the power to direct the receipt of dividends
from, or the proceeds from the sale of, any of the shares of Common Stock reported herein.

Item 6. Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer

Item 6 of the Schedule 13D is hereby amended to read in its
entirety as follows:

There are no contracts,
arrangements, understandings or relationships (legal or otherwise) between or among any of the Reporting Persons and any other
person with respect to any securities of the Company other than the governing documents of Discovery Group and Discovery Equity
Partners, the margin loan facilities referred to under Item 3 above, the Joint Filing Agreements of the
Reporting Persons
with respect to the Schedule 13D that were included as exhibits thereto, the Joint Filing Agreement of the Reporting Persons with
respect to this Amendment No. 3 included as Exhibit 2 to this Amendment No. 3, and the Powers of Attorney granted by Messrs.
Donoghue and Murphy with respect to reports under Section 13 of the Securities Exchange Act of 1934, as amended, which Powers of
Attorney are included as Exhibit 3 and Exhibit 4, respectively, to this Amendment No. 3.

Item 7. Material to Be Filed as Exhibits
Exhibit 1:            List of transactions effected by the Reporting Persons in the Company’s Common Stock since those reported in the Schedule 13D filed by the Reporting Persons on August 16, 2016.
Exhibit 2:            Joint Filing Agreement dated as of August 30, 2016, by and among Discovery Equity Partners; Discovery Group; Daniel J. Donoghue; and Michael R. Murphy.
Exhibit 3:            Power of Attorney of Daniel J. Donoghue, dated as of April 28, 2008.
Exhibit 4:            Power of Attorney of Michael R. Murphy, dated as of April 28, 2008.

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Page 8 of 9 – SEC Filing

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.

August 30, 2016
Date

DISCOVERY GROUP I, LLC,

for itself and as general partner of

DISCOVERY EQUITY PARTNERS, L.P.

By:  Michael R. Murphy*
Signature
Michael R. Murphy, Managing Member
Name/Title
Daniel J. Donoghue*
Signature
Daniel J. Donoghue
Name/Title
Michael R. Murphy*
Signature
Michael R. Murphy
Name/Title
*By: /s/ Mark Buckley

Mark Buckley

Attorney-in-Fact for Daniel J. Donoghue

Attorney-in-Fact for Michael R. Murphy

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Page 9 of 9 – SEC Filing

Exhibit Index

 

Exhibit 1 List of transactions effected by the Reporting Persons in the Company’s Common Stock since those reported in the Schedule 13D filed by the Reporting Persons on August 16, 2016.
Exhibit 2 Joint Filing Agreement dated as of August 30, 2016, by and among Discovery Equity Partners; Discovery Group; Daniel J. Donoghue; and Michael R. Murphy.
Exhibit 3 Power of Attorney of Daniel J. Donoghue, dated as of April 28, 2008.
Exhibit 4 Power of Attorney of Michael R. Murphy, dated as of April 28, 2008.

 

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