EXHIBIT 99.3
JOINT FILING AGREEMENT
Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned agree that the Schedule 13D relating to the common stock of SoundThinking, Inc., and any amendments thereto, shall be filed jointly on their behalf. This agreement shall be included as an exhibit to that Schedule 13D.
 
     
Gary M. Lauder
 
     
Signature
/s/ Gary M. Lauder  
Name/Title:
Gary M. Lauder
 
Date:
October 2, 2026
 
     
The Gary M. Lauder Revocable Trust UAD 8/10/2000
 
     
Signature:
/s/ Gary M. Lauder  
Name/Title:
Gary M. Lauder, Trustee
 
Date:
October 2, 2026
 
     
Lauder Partners LLC
 
     
Signature:
/s/ Gary M. Lauder  
Name/Title:
Gary M. Lauder, Managing Director
 
Date:
October 2, 2026
 
     
Gary M. Lauder 2015 Trust
 
     
Signature:
/s/ Benjamin Zeliger  
Name/Title:
Benjamin Zeliger, President of Roaring Fork Trust Company, Inc., its Trustee
 
Date:
October 2, 2026