SOUNDTHINKING SVP granted 56,222 RSUs

Arthur Kirk reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Arthur Kirk reported acquisition or exercise transactions in this Form 4 filing.

SOUNDTHINKING, INC. reported that SVP of Sales Arthur Kirk received a grant of 56,222 shares of Common Stock in the form of restricted stock units. These RSUs were awarded at no cash cost to him and will vest in 12 equal quarterly installments starting after May 31, 2026, contingent on his continued service.

Insider Trade Summary

Grant/Award: 56,222 shares

Grant/Award 1 txn

Insider Arthur Kirk

Role SVP, Sales

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	56,222	$0.00	$0.00

Holdings After Transaction: Common Stock — 56,222 shares (Direct)

Footnotes (1)

1. F1. Represents restricted stock units ("RSUs"). Each RSU represents the contingent right to receive one share of the Issuer's Common Stock upon settlement. 1/12 of the shares subject to the award vest on the first Quarterly Date (as defined below) that occurs following the vesting commencement date (May 31, 2026), and 1/12 of the total number of shares subject to the award vest on each Quarterly Date thereafter, subject to the recipient's Continuous Service (as defined in the Issuer's 2017 Equity Incentive Plan, as amended) through each applicable Quarterly Date. "Quarterly Date" means each of February 28, May 31, August 31, and November 30, of a given calendar year.

Key Figures

RSUs granted: 56,222 units Grant price: $0.00 per share Post‑grant holdings from this award: 56,222 shares +1 more

4 metrics

RSUs granted 56,222 units Restricted stock units awarded to SVP, Sales

Grant price $0.00 per share Equity compensation, no cash paid by insider

Post‑grant holdings from this award 56,222 shares Total Common Stock underlying RSUs after transaction

Vesting schedule 12 quarterly installments 1/12 vests each Quarterly Date starting after May 31, 2026

Key Terms

restricted stock units ("RSUs"), Continuous Service, 2017 Equity Incentive Plan, Quarterly Date

4 terms

restricted stock units ("RSUs") financial

"Represents restricted stock units ("RSUs"). Each RSU represents the contingent right to receive one share..."

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

Continuous Service financial

"subject to the recipient's Continuous Service (as defined in the Issuer's 2017 Equity Incentive Plan..."

2017 Equity Incentive Plan financial

"as defined in the Issuer's 2017 Equity Incentive Plan, as amended..."

Quarterly Date financial

""Quarterly Date" means each of February 28, May 31, August 31, and November 30..."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did SOUNDTHINKING (SSTI) report for Arthur Kirk?

SOUNDTHINKING reported that SVP of Sales Arthur Kirk received 56,222 restricted stock units. Each unit represents the right to one share of Common Stock, awarded at no cash cost as part of his equity compensation package.

How many shares did Arthur Kirk acquire in the latest SSTI Form 4?

Arthur Kirk acquired 56,222 shares in the form of restricted stock units. These RSUs give him a contingent right to receive one share of SOUNDTHINKING Common Stock for each unit when they settle and vest over time.

How do Arthur Kirk’s SSTI RSUs vest over time?

The 56,222 RSUs vest in 12 equal installments. One-twelfth vests on the first Quarterly Date after the May 31, 2026 vesting start, and one-twelfth vests on each subsequent Quarterly Date, assuming his continuous service.

What does “Quarterly Date” mean in the SOUNDTHINKING RSU grant?

Quarterly Date in this grant means February 28, May 31, August 31, and November 30 of each year. On each of these dates, a portion of Arthur Kirk’s restricted stock units is scheduled to vest if he remains in continuous service.

Is Arthur Kirk’s SSTI RSU grant an open-market stock purchase?

No, this is not an open-market purchase. The Form 4 shows a grant of restricted stock units at a price of $0.00 per share, reflecting stock-based compensation rather than Kirk buying shares on the public market.

What are restricted stock units (RSUs) in the context of SOUNDTHINKING (SSTI)?

Restricted stock units are awards that give the holder a contingent right to receive shares later. For SOUNDTHINKING, each RSU equals one share of Common Stock, delivered only as vesting conditions like continued service are satisfied over time.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/21/2026 - 04:08 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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 APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Arthur Kirk

(Last) (First) (Middle)

C/O SOUNDTHINKING, INC.

39300 CIVIC CENTER DR., SUITE 300

(Street)

FREMONT CALIFORNIA 94538

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
SOUNDTHINKING, INC. [ SSTI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Sales

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/19/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	05/19/2026		A		56,222(1)	A	$0	56,222	D

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 Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. Represents restricted stock units ("RSUs"). Each RSU represents the contingent right to receive one share of the Issuer's Common Stock upon settlement. 1/12 of the shares subject to the award vest on the first Quarterly Date (as defined below) that occurs following the vesting commencement date (May 31, 2026), and 1/12 of the total number of shares subject to the award vest on each Quarterly Date thereafter, subject to the recipient's Continuous Service (as defined in the Issuer's 2017 Equity Incentive Plan, as amended) through each applicable Quarterly Date. "Quarterly Date" means each of February 28, May 31, August 31, and November 30, of a given calendar year.

Remarks:

SVP, Sales

	/s/ Kirk Arthur	05/21/2026
	** 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 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).
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.
* Form 4: SEC 1474 (03-26)