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

---

Item 4.

Purpose of Transaction

Item 4 of Schedule 13D is supplemented and superseded, as the case
may be, as follows:

This Amendment No. 1 is being filed to report the disposition of Common Stock reported in Item 5(c) that
resulted in a more than 1 percent change in beneficial ownership. Since the Reporting Persons’ September 10, 2015 filing of Schedule 13D, the Reporting Persons made dispositions of Common Stock in the ordinary course of business and
consistent with the investment purpose based on market conditions and other factors.

The Reporting Persons generally intend to dispose
of, or cause to be disposed, additional shares of Common Stock depending on market conditions and other factors.

Item 5.

Interest in Securities of the Issuer

Item 5 of the Schedule 13D is hereby amended and
restated as follows:

(a) – (b) The Reporting Persons beneficially own 1,400,151 shares of Common Stock, which represents 2.6% of the
Issuer’s outstanding shares of Common Stock. The percentage of beneficial ownership of the Reporting Persons, as reported in this Schedule 13D, was calculated by dividing (i) the total number of shares of Common Stock beneficially owned by
the Reporting Persons as of January 15, 2016 as set forth in this Schedule 13D, by (ii) the 53,627,361 shares of Common Stock outstanding as of October 15, 2015, according to the Issuer’s Current Report on Form 10-Q filed with
the SEC on October 21, 2015.

Praesidium, in its capacity as investment manager to the Accounts, has sole power to vote 1,324,652
shares of Common Stock and the power 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 has sole power to vote 1,324,652 shares of Common Stock and the power
to dispose of 1,400,151 shares of Common Stock held in the Accounts.

(c) Transactions in the Issuer’s securities by the Reporting
Persons during the last sixty days are listed in Annex A attached hereto.

(d) Not Applicable.

(e) As of January 14, 2016 the Reporting Persons ceased to be the beneficial owners of more than five percent of the Issuer’s Common
Stock.

Page 6 of 8