Washington, D.C. 20549


Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB Number: 3235-0104
Estimated average burden
hours per response: 0.5
1. Name and Address of Reporting Person*
Mnookin Allison

(Last) (First) (Middle)


(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
3. Issuer Name and Ticker or Trading Symbol
LPL Financial Holdings Inc. [ LPLA ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
No securities are beneficially owned 0 D
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Explanation of Responses:
The signatory is signing on behalf of Allison Mnookin pursuant to a Power of Attorney dated May 31, 2018, which is filed as Exhibit 24.1 to this filing.
/s/ Gregory M. Woods, attorney-in-fact 06/05/2018
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

I hereby constitute and appoint each of Gregory M. Woods and Astrid Tsang, signing singly, my true and lawful attorney-in-fact to:

(1) execute on my behalf any Form 3  Initial Statement of Beneficial Ownership of Securities,  Form 4  Statement of Changes of Beneficial Ownership of Securities or Form 5  Annual Statement of Beneficial Ownership of Securities, including any amendments, supplements or exhibits thereto (each, a "Section 16 Report"), which I am required to file in my capacity as a director of LPL Financial Holdings Inc. (the "Company") in accordance with Section 16(a) of the Securities Exchange Act of 1934, as amended (the "Act") and the rules thereunder;

(2) do and perform any and all acts for and on my behalf that may be necessary or desirable to complete and execute any Section 16 Report and timely file such report with the United States Securities and Exchange Commission and any stock exchange or similar authority; 

(3) seek or obtain, as my representative and on my behalf, information on transactions in the Company's securities from any third party, including brokers, employee benefit plan administrators and trustees, and I hereby authorize any such third party to release any such information
 to each of my attorneys-in-fact appointed by this Power of Attorney; and 

(4) take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be to my benefit, in my best interest, or that I am legally required to do, it being understood that the documents executed by such attorney-in-fact on my behalf pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.

I hereby grant to each attorney-in-fact hereunder full power and authority to do and perform any and every act and thing whatsoever necessary or desirable to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as I might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted.  

I acknowledge that this Power of Attorney does not relieve me of my responsibilities to comply with Section 16 of the Act and the attorneys-in-fact, in serving in such capacity at my request, are not assuming, nor is the Company assuming, any of my responsibilities to comply with Section 16 of the Act.  

This Power of Attorney shall remain in full force and effect until I am no longer required to file Section 16 Reports with respect to my holdings of and transactions in Company securities, unless I earlier revoke it in a signed writing delivered to the attorneys-in-fact.

IN WITNESS WHEREOF, I have caused this Power of Attorney to be executed as of this 31st day of May, 2018.
By: /s/ Allison Mnookin