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

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE
13D/A

(Rule 13d-101)

(Amendment No. 1)*

Under the Securities Exchange Act of 1934

Flotek
Industries, Inc.

(Name of Issuer)

Common Stock, $0.0001 par value

(Title of Class of Securities)

343389102

(CUSIP NUMBER)

Praesidium Investment Management Company, LLC

1411 Broadway – 29th Floor

New York, NY 10018

Tel.
No.: (212) 821-1495

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

January 15, 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 which is the subject of this Schedule 13D/A, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g) check the following box  ¨

The information required in 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, as amended (the “Act”), or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act.

*	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.

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