UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
 
 
SCHEDULE 13G
 
 
Under the Securities Exchange Act of 1934
(Amendment No. ________)*
 

 
Imperva, Inc.
(Name of Issuer)

Common Stock, par value $0.0001 per share  
(Title of Class of Securities)
 
45321L100
(CUSIP Number)
 
21 November 2018
(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)
☐   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 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).
 


         
         
CUSIP No.   60671Q104
 
13G
 
Page 2 of 5 Pages



1.
 
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

Sand Grove Capital Management LLP
2.
 
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(see instructions)
(a)     ☐
(b)     ☐
3.
 
SEC USE ONLY
 
4.
 
CITIZENSHIP OR PLACE OF ORGANIZATION
 
United Kingdom
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
5.
SOLE VOTING POWER
1,869,552 (1)
6.
SHARED VOTING POWER
 
 
7.
SOLE DISPOSITIVE POWER
1,869,552 (1)
8.
SHARED DISPOSITIVE POWER
 
 
9.
 
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,869,552 (1)
 
10.
 
CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(see instructions)     ☐

11.
 
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
5.3%
 
12.
 
TYPE OF REPORTING PERSON (see instructions)
PN
 
 
 
(1) Comprised of shares of Common Stock held by the Sand Grove Opportunities Master Fund Ltd and the Sand Grove Tactical Fund LP, of which Sand Grove Capital Management LLP is the investment manager.




         
         
CUSIP No. 60671Q104
 
13G
 
Page 3 of 5 Pages
 
 
 
 
 
 
Item 1.
 
 
(a)
Name of Issuer
Imperva, Inc.
 
   
 
(b)
Address of Issuer’s Principal Executive Offices
3400 Bridge Parkway
Redwood Shores
California 94065
 
   
 
Item 2.
 
 
(a)
Name of Person Filing
Sand Grove Capital Management LLP
 
 
   
 
(b)
Address of the Principal Office or, if none, residence
 
The principal business office of Sand Grove Capital Management LLP is 35 Dover Street, London, W1S 4NQ, United Kingdom.
 
 
   
 
(c)
Citizenship
Sand Grove Capital Management LLP is a UK Limited Partnership.
 
 
   
 
(d)
Title of Class of Securities
Common Stock, par value $0.0001 per share
 
 
   
 
(e)
CUSIP Number
45321L100
 
   
 
Item 3.  If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
 
 
(a)
☐
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).
 
     
 
(b)
☐
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).
 
     
 
(c)
☐
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).
 
     
 
(d)
☐
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).
 
     
 
(e)
☐
An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);
 
     
 
(f)
☐
An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);
 
     
 
(g)
☐
A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G);
 
     
 
(h)
☐
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
 
     
 
(i)
☐
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
 
     
 
(j)
☒
A non-U.S. institution in accordance with §240.13d-1(b)(1)(ii)(J);
 
     
 
(k)
☐
A group, in accordance with §240.13d-1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with §240.13d-1(b)(1)(ii)(J), please specify the type of institution:______________
 


Item 4.  Ownership.
 
 
The information required by Items 4(a) - (c) is set forth in Rows (5) - (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
 
 
The percentages set forth in this Schedule 13G are calculated based upon an aggregate of 35,197,514 shares of Common Stock outstanding as of November 21, 2018.
 
 
Item 5.  Ownership of Five Percent or Less of a Class.
 
 
If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following q .
 
 
Instruction . Dissolution of a group requires a response to this item.
 
 
Item 6.  Ownership of More than Five Percent on Behalf of Another Person.
 
 
 Not Applicable
 
 
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.
 
       
 
(a)
 
The following certification shall be included if the statement is filed pursuant to §240.13d-1(b):
 
     
 
 
 
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and 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.
 
     
 
(b)
 
The following certification shall be included if the statement is filed pursuant to §240.13d-1(c):
 
     
 
 
 
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.
       

 

         
         
CUSIP No. 60671Q104
 
13G
 
Page 5 of 5 Pages
 
 
 
 
 
 
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.
 
   
 
11/28/2018
 
  Date
   
 
/s/
  Signature
 
 
  Daniel Mclachlan, Business Analyst
  Name/Title


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