13D Filing: Silver Lake Partners and Blackhawk Network Holdings Inc (HAWK)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No.    )*

Blackhawk
Network Holdings, Inc.

(Name of Issuer)

Common Stock

(Title of
Class of Securities)

09238E104

(CUSIP Number)

Karen King

c/o Silver Lake

2775 Sand Hill Road, Suite 100

Menlo Park, CA 94025

(650) 233-8120

With copies to:

Benjamin Schaye, Esq.

Simpson Thacher & Bartlett LLP

425 Lexington Avenue

New
York, NY 10017

(212) 455-2000

(Name, Address and Telephone Number of Person

Authorized to Receive Notices and Communications

January 15, 2018

(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 Rule 13d-7(b) for other parties to whom copies are to be sent.

*	The remainder of this cover page shall be filled out for a reporting persons 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).