ssti-defa14a_20181231.htm

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☐	Preliminary Proxy Statement

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☐	Definitive Proxy Statement

☒	Definitive Additional Materials

☐	Soliciting Material Pursuant to §240.14a-12

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MMMMMMMMMMMM + C 1234567890 000004 MMMMMMM ENDORSEMENT_LINE______________ SACKPACK_____________ MMMMMMMMM MR A SAMPLE Online DESIGNATION (IF ANY) ADD 1 Go to www.envisionreports.com/SSTI or scan ADD 2 the QR code — login details are located in the ADD 3 shaded bar below. ADD 4 ADD 5 ADD 6 Votes submitted electronically must be received by 1:00 a.m., Pacific Time, on June 13, 2019. Important Notice Regarding the Availability of Proxy Materials for the ShotSpotter, Inc. Stockholder Meeting to be Held on Thursday, June 13, 2019 Under Securities and Exchange Commission rules, you are receiving this notice that the proxy materials for the annual stockholders’ meeting are available on the Internet. Follow the instructions below to view the materials and vote online or request a copy. The items to be voted on and location of the annual meeting are on the reverse side. Your vote is important! This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. We encourage you to our Vote or Request Materials. Step 3: Follow the instructions on the screen to log in. Step 4: Make your selections as instructed on each screen for your delivery preferences. Step 5: Vote your shares. When you go online, you can alfor requesting a copy. Please make your request as instructed on the reverse side on or before June 3, 2019 to facilitate timely delivery. 2NOT COY +

IF VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE. Proxy — ShotSpotter, Inc. Notice of 2019 Annual Meeting of Stockholders 7677 Gateway Blvd., 2nd Floor, Newark, California, 94560 Proxy Solicited by Board of Directors for Annual Meeting — June 13, 2019 The undersigned hereby appoints Ralph A. Clark and Alan R. Stewart, and each of them, with power to act without the other and with power of substitution, as proxies and attorneys-in-fact and hereby authorizes them to represent and vote, as provided below, all the shares of ShotSpotter, Inc. Common Stock which the undersigned is entitled to vote, and, in their discretion, to vote upon such other business as may properly come before the 2019 Annual Meeting of Stockholders of ShotSpotter, Inc. (the “Meeting”) to be held on Thursday, June 13, 2019 at 9:30 a.m. local time at 7677 Gateway Blvd., 2nd Floor, Newark, California, 94560 and or at any adjournment or postponement thereof, with all powers which the undersigned would possess if present at the Meeting. UNLESS A CONTRARY DIRECTION IS INDICATED, THIS PROXY WILL BE VOTED “FOR” ALL OF THE NOMINEES FOR DIRECTOR LISTED IN PROPOSAL NO. 1, AND “FOR” PROPOSAL NO. 2, AS MORE SPECIFICALLY DESCRIBED IN THE PROXY STATEMENT. IF SPECIFIC INSTRUCTIONS ARE INDICATED, THIS PROXY WILL BE VOTED IN ACCORDANCE THEREWITH. IN THEIR DISCRETION, THE PROXIES OF THE UNDERSIGNED ARE AUTHORIZED TO VOTE UPON ANY AND ALL OTHER MATTERS THAT MAY PROPERLY COME BEFORE THE MEETING. (Continued and to be marked, dated and signed, on the other side)

BARCODE See the reverse side of this notice to obtain proxy materials and voting instructions. BROKER LOGO HERE 1 OF 2 12 15 1234567 1234567 1234567 1234567 1234567 1234567 1234567 Broadridge Internal Use Only Job # Envelope # Sequence # # of # Sequence # *** Exercise Your Right to Vote *** Important Notice Regarding the Availability of Proxy Materials for the Shareholder Meeting to Be Held on <mtgdate>. You are receiving this communication because you hold shares in the above named company. This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side). We encourage you to access and review all of the important information contained in the proxy materials before voting. Meeting Information Meeting Type: <mtgtype> For holders as of: <recdate> Date: Time: <mtgtime> Location: 0000422176_1 R1.0.1.18 SHOTSPOTTER, INC. Annual Meeting June 13, 2019 June 13, 2019 9:30 AM PDT April 18, 2019 7677 Gateway Blvd 2nd Floor Newark, CA 94560 Return Address Line 1 Return Address Line 2 Return Address Line 3 51 MERCEDES WAY EDGEWOOD NY 11717 Investor Address Line 1 Investor Address Line 2 Investor Address Line 3 Investor Address Line 4 Investor Address Line 5 John Sample 1234 ANYWHERE STREET ANY CITY, ON A1A 1A1

How To Vote Please Choose One of the Following Voting Methods Internal Use Only Before You Vote How to Access the Proxy Materials Proxy Materials Available to VIEW or RECEIVE: How to View Online: Have the information that is printed in the box marked by the arrow (located on the following page) and visit: www.proxyvote.com. How to Request and Receive a PAPER or E-MAIL Copy: If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request: 1) BY INTERNET: www.proxyvote.com 2) BY TELEPHONE: 1-800-579-1639 3) BY E-MAIL*: sendmaterial@proxyvote.com * If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked by the arrow (located on the following page) in the subject line. g g Vote In Person: If you choose to vote these shares in person at the meeting, you must request a "legal proxy." To do so, please follow the instructions at www.proxyvote.com or request a paper copy of the materials, which will contain the appropriate instructions. Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the box marked by the arrow available and follow the instructions. Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a voting instruction form. g 0000422176_2 R1.0.1.18 1. Annual Report 2. Notice & Proxy Statement Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before June 03, 2019 to facilitate timely delivery.

BARCODE 123456789012 123456789012 123456789012 123456789012 123456789012 123456789012 123456789012 123456789012 123456789012 123456789012 123456789012 123456789012 Broadridge Internal Use Only xxxxxxxxxx xxxxxxxxxx Cusip Job # Envelope # Sequence # # of # Sequence # Voting items 0000422176_3 R1.0.1.18 The Board of Directors recommends that you vote FOR the following: 1. Election of Directors Nominees 01 Pascal Levensohn* 02 Thomas T. Groos* The Board of Directors recommends you vote FOR the following proposal(s): 2. To ratify the selection of Baker Tilly Virchow Krause, LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2019. NOTE: *Election of Class II Directors: Such other business as may properly come before the meeting or any adjournment thereof.

THIS SPACE RESERVED FOR LANGUAGE PERTAINING TO BANKS AND BROKERS AS REQUIRED BY THE NEW YORK STOCK EXCHANGE Voting Instructions THIS SPACE RESERVED FOR SIGNATURES IF APPLICABLE P99999-010 12 15 # OF # Broadridge Internal Use Only Job # Envelope # Sequence # # of # Sequence # Reserved for Broadridge Internal Control Information 0000422176_4 R1.0.1.18