13D Filing: Praesidium Investment Management Company, LLC Provides Update on Flotek Industries Inc (FTK) Position

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SCHEDULE 13D/A

This Amendment No. 1 amends and supplements the information set forth in the Schedule 13D filed on behalf of (i) Praesidium
Investment Management Company, LLC, a Delaware limited liability company (“Praesidium”), (ii) Kevin Oram and (iii) Peter Uddo (together with Praesidium and Mr. Oram, the “Reporting Persons”) with the United States
Securities and Exchange Commission on September 10, 2015 (the “Schedule 13D”), relating to shares of common stock, $0.0001 par value (“Common Stock”), of Flotek Industries, Inc., a Delaware corporation (the
“Issuer”). All capitalized terms contained herein but not otherwise defined shall have the meanings ascribed to such terms in the Schedule 13D.

The information set forth in response to each separate Item below shall be deemed to be a response to all Items where such information is
relevant.

Item 2.

Identity and Background

Item 2(a) of the Schedule 13D is hereby amended and restated as
follows:

(a) This statement is filed by: (i) Praesidium Investment Management Company, LLC, a Delaware limited liability company
(“Praesidium”), (ii) Kevin Oram and (iii) Peter Uddo (together with Praesidium and Mr. Oram, the “Reporting Persons”).

Praesidium, in its capacity as investment manager to certain managed accounts and investment fund vehicles on behalf of investment advisory
clients (collectively, the “Accounts”), has sole power to vote 1,324,652 shares of Common Stock held in the Accounts and to dispose of 1,400,151 shares of Common Stock held in the Accounts. As the managing members of Praesidium, each of
Kevin Oram and Peter Uddo may be deemed to control Praesidium.

Item 3.

Source and Amount of Funds

Item 3 of the Schedule 13D is hereby amended and restated as
follows:

The net investment costs (including commissions, if any) of the shares of Common Stock directly owned by the Accounts is
approximately $14.20 per share. The source of these funds for the Accounts was their working capital.

Purchases of some securities for
certain Accounts were effected through margin accounts maintained with brokers, which may extend margin credit as and when required to open or carry positions in the margin accounts, subject to applicable federal margin regulations, stock exchange
rules and the brokers’ credit policies. In such instances, the positions held in the margin accounts may be pledged as collateral security for the repayment of debit balances in the accounts.

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