UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. 2)*

LifeLock, Inc.

(Name of Issuer)

Common Stock, $0.001 par value

(Title of Class of Securities)

53224V 10 0

(CUSIP Number)

December 31, 2016

(Date of Event which Requires filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

[ ]	Rule 13d-1(b)
[x]	Rule 13d-1(c)
[ ]	Rule 13d-1(d)

* 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 the disclosures provided in a prior cover page.

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 (“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).

CUSIP No. 53224V 10 0

1	NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Prescott General Partners LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [x]
3	SEC USE ONLY
4	CITIZEN OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER 0
		6	SHARED VOTING POWER 5,365,630
		7	SOLE DISPOSITIVE POWER 0
		8	SHARED DISPOSITIVE POWER 5,365,630
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,365,630
10	CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES Not Applicable
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 5.7%
12	TYPE OF REPORTING PERSON OO

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CUSIP No. 53224V 10 0

1	NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Prescott Associates L.P.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [x]
3	SEC USE ONLY
4	CITIZEN OR PLACE OF ORGANIZATION New York
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER 0
		6	SHARED VOTING POWER 4,144,825
		7	SOLE DISPOSITIVE POWER 0
		8	SHARED DISPOSITIVE POWER 4,144,825
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 4,144,825
10	CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES Not Applicable
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 4.4%
12	TYPE OF REPORTING PERSON PN

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CUSIP No. 53224V 10 0

1	NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Prescott Investors Profit Sharing Trust.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [x]
3	SEC USE ONLY
4	CITIZEN OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER 63,266
		6	SHARED VOTING POWER 0
		7	SOLE DISPOSITIVE POWER 63,266
		8	SHARED DISPOSITIVE POWER 0
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 63,266
10	CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES Not Applicable
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 0.1%
12	TYPE OF REPORTING PERSON EP

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CUSIP No. 53224V 10 0

1	NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Thomas W. Smith
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [x]
3	SEC USE ONLY
4	CITIZEN OR PLACE OF ORGANIZATION United States
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER 100,000
		6	SHARED VOTING POWER 145,300
		7	SOLE DISPOSITIVE POWER 100,000
		8	SHARED DISPOSITIVE POWER 145,300
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 245,300
10	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES Not Applicable
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0.3%
12	TYPE OF REPORTING PERSON IN

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Explanatory Note:

The following constitutes Amendment No. 2 to the joint filing on Schedule 13G by Prescott General Partners LLC (“PGP”), Thomas W. Smith and Scott J. Vassalluzzo originally filed with the Securities and Exchange Commission (the “SEC”) on February 13, 2015, as amended by Amendment No. 1 filed by PGP, Prescott Associates, L.P. (“Prescott Associates”), Thomas W. Smith and Scott J. Vassalluzzo with the SEC on February 16, 2016 (as amended, the “Schedule 13G”). This Amendment No. 2 modifies the Schedule 13G to reflect, among other things, (i) the addition of Prescott Investors Profit Sharing Trust (“PIPS”) as a Reporting Person and (ii) the removal of Scott J. Vassalluzzo as a Reporting Person. As of December 31, 2016, Mr. Vassalluzzo no longer beneficially owned any shares of the issuer’s common stock. Unless otherwise indicated, all capitalized terms used herein shall have the meanings given to them in the Schedule 13G.

ITEM 1.	(a)	Name of Issuer:
		LifeLock, Inc.
	(b)	Address of Issuer's Principal Executive Offices:
		60 E. Rio Salado Parkway, Suite 400 Tempe, AZ 85281
ITEM 2.	(a)	Name of Person Filing:
		(i)	PGP
		(ii)	Prescott Associates
		(iii)	PIPS
		(iv)	Thomas W. Smith
		The joint filing of this statement shall not be deemed to be an admission that the reporting persons (the “Reporting Persons”) comprise a “group” within the meaning of Section 13(d)(3) of the Securities Exchange Act of 1934, as amended. The Reporting Persons each disclaim beneficial ownership of the shares reported in this statement in excess of those shares as to which they have or share voting or investment authority.
	(b)	Address of Principal Business Office:
		The following is the address of the principal business office of each of the Reporting Persons:
		2200 Butts Road, Suite 320 Boca Raton, FL 33431

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	(c)	Citizenship:
		PGP is a Delaware limited liability company. Prescott Associates is a New York limited partnership. PIPS is an employee profit-sharing plan organized under the laws of the State of Delaware. Thomas W. Smith is a United States citizen.
	(d)	Title of Class of Securities:
		Common Stock, $0.001 par value
	(e)	CUSIP Number:
		53224V 10 0
ITEM 3.	If this Statement is filed pursuant to Rules 13d-1(b) or 13d-2(b) or (c), check whether the person filing is a:
	Not applicable.
	If this Statement is filed pursuant to Rule 13d-1(c), check this box [x]
ITEM 4.	Ownership
	(a)	PGP – 5,365,630 shares; Prescott Associates – 4,144,825 shares; PIPS – 63,266 shares; Thomas W. Smith – 245,300 shares.
	(b)	PGP – 5.7%; Prescott Associates – 4.4%; PIPS – less than 0.1%; Thomas W. Smith – 0.3%.
	(c)	PGP, as the general partner of three private investment limited partnerships, including Prescott Associates (collectively, the “Partnerships”), may be deemed to share the power to vote or to direct the vote and to dispose or to direct the disposition of 5,365,630 shares held by the Partnerships.
		Prescott Associates has the shared power to vote or to direct the vote and to dispose or to direct the disposition of 4,144,825 shares.
		PIPS has the sole power to vote or to direct the vote of and to dispose or to direct the disposition of 63,266 shares.
		Mr. Smith has the sole power to vote or to direct the vote of and to dispose or to direct the disposition of 100,000 shares held by Ridgeview Smith Investments LLC, a limited liability company established by Mr. Smith and of which he is the sole member.
		In his capacity as investment manager for certain managed accounts, Mr. Smith may be deemed to have the shared power to vote or to direct the vote of and to dispose or to direct the disposition of 145,300 shares. Voting and investment authority over investment accounts established for the benefit of certain family members and friends of Mr. Smith is subject to each beneficiary’s right, if so provided, to terminate or otherwise direct the disposition of the investment account.

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ITEM 5.	Ownership of Five Percent or Less of a Class

	As of December 31, 2016, Mr. Vassalluzzo no longer beneficially owned any shares of the issuer’s common stock.

ITEM 6.	Ownership of More than Five Percent on Behalf of Another Person

	PGP, as the general partner of the Partnerships, may be deemed to beneficially own 5,365,630 shares held by the Partnerships, including 4,144,825 shares held by Prescott Associates. Mr. Smith may be deemed to beneficially own 145,300 in his capacity as investment manager for certain managed accounts. The Partnerships and the managed accounts have the right to receive dividends from, and the proceeds from the sale of, the shares held by the Partnerships and the managed accounts, respectively. Voting and investment authority over managed accounts established for the benefit of certain family members and friends of Mr. Smith is subject to each beneficiary’s right, if so provided, to terminate or otherwise direct the disposition of the managed account.

ITEM 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company

	Not applicable.

ITEM 8.	Identification and Classification of Members of the Group

	Not applicable.

ITEM 9.	Notice of Dissolution of Group

	Not applicable.

ITEM 10.	Certification

	By signing below, I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

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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.

Date: February 14, 2017

PRESCOTT General partners LLC

/s/ Thomas W. Smith

Name: Thomas W. Smith

Title: Managing Member

PRESCOTT ASSOCIATES L.P.

By: Prescott General Partners LLC

Its: General Partner

/s/ Thomas W. Smith

Name: Thomas W. Smith

Title: Managing Member

PRESCOTT INVESTORS PROFIT SHARING TRUST

/s/ Thomas W. Smith

Name: Thomas W. Smith

Title: Trustee

/s/ Thomas W. Smith

Thomas W. Smith

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JOINT FILING AGREEMENT

The undersigned agree that the foregoing statement on Schedule 13G, dated February 14, 2017, is being filed with the Securities and Exchange Commission on behalf of each of the undersigned pursuant to Rule 13d-1(k).

Date: February 14, 2017

PRESCOTT General partners LLC

/s/ Thomas W. Smith

Name: Thomas W. Smith

Title: Managing Member

PRESCOTT ASSOCIATES L.P.

By: Prescott General Partners LLC

Its: General Partner

/s/ Thomas W. Smith

Name: Thomas W. Smith

Title: Managing Member

PRESCOTT INVESTORS PROFIT SHARING TRUST

/s/ Thomas W. Smith

Name: Thomas W. Smith

Title: Trustee

/s/ Thomas W. Smith

Thomas W. Smith

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LIFELOCK, INC. SC 13G/A