FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Valenti Douglas   2. Issuer Name and Ticker or Trading Symbol QUINSTREET, INC [QNST] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Executive Officer (Last) (First) (Middle) 950 TOWER LANE, 6TH FLOOR 3. Date of Earliest Transaction (Month/Day/Year) 06/13/2018 (Street) FOSTER CITY, CA 94404 4. If Amendment, Date 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 (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 06/13/2018   M   12,501 A $ 3.63 292,564 D   Common Stock 06/13/2018   S   12,501 (1) D $ 13.7309 (2) 280,063 D   Common Stock 06/13/2018   M   13,750 A $ 9.55 293,813 D   Common Stock 06/13/2018   S   13,750 (1) D $ 13.731 (3) 280,063 D   Common Stock               1,432,224 I by Partnership Common Stock               6,903 I by Son (4) Common Stock               3,923,601 I by Trust

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Non-Qualified Stock Option (right to buy)

$ 3.63

06/13/2018

M

12,501

(5)

07/28/2023

Common Stock

12,501

$ 0

143,668

D

Non-Qualified Stock Option (right to buy)

$ 9.55

06/13/2018

M

13,750

(6)

07/24/2020

Common Stock

13,750

$ 0

88,637

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Valenti Douglas 950 TOWER LANE, 6TH FLOOR FOSTER CITY, CA 94404	X		Chief Executive Officer

Signatures

By: Gregory Wong For: Douglas Valenti		06/15/2018
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(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).
(1)	These shares were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 30, 2017 (the "Options Plan"). The Options Plan was implemented to meet long-term estate planning and diversification objectives of the reporting person, and extend over an approximately two year period. The shares sold represent less than 1% of the shares beneficially owned by the reporting person as of December 31, 2017.
(2)	The shares were sold at prices between $13.60 and $13.98. The reporting person will provide upon request to the SEC, the issuer, or security holder of the issuer, full information regarding the number of shares sold at each price.
(3)	The shares were sold at prices between $13.60 and $13.99. The reporting person will provide upon request to the SEC, the issuer, or security holder of the issuer, full information regarding the number of shares sold at each price.
(4)	Shares held by Mr. Valenti's children.
(5)	The option vested and became exercisable at a rate of 25% of the option on the first anniversary of the vesting commencement date, July 29, 2016, and the remainder of the option vest in equal monthly installments over 36 months thereafter. The initial vest date was July 29, 2017 and the final vest date is July 29, 2020.
(6)	The option vested and became exercisable at a rate of 25% of the option on the first anniversary of the vesting commencement date, July 25, 2013, and the remainder of the option vested in equal monthly installments over 36 months thereafter. The initial vest date was July 25, 2014 and the final vest date was July 25, 2017.

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