System1 CFO has 6,022 shares withheld for taxes

System1, Inc. Chief Financial Officer Kidambi Tridivesh reported a tax-withholding disposition of 6,022 shares of Class A Common Stock on July 15, 2026, at $2.60 per share.

Accepted by SEC EDGAR 07/17/2026 - 06:07 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

System1, Inc. Chief Financial Officer Kidambi Tridivesh reported a tax-withholding disposition of 6,022 shares of Class A Common Stock on July 15, 2026, at $2.60 per share. The company withheld these shares to cover taxes on the vesting of 17,338 RSUs. After this event, Tridivesh directly holds 175,793 shares, including 35,176 unvested RSUs.

Insider Trade Summary

Tax Withholding: 6,022 shares

Tax Withholding 1 txn

Insider Kidambi Tridivesh

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Tax Withholding	Class A Common Stock F1, F2	6,022	$2.60	$16K

Holdings After Transaction: Class A Common Stock — 175,793 shares (Direct)

Footnotes (2)

1. F1. Upon the vesting of 17,338 restricted stock units ("RSUs") previously granted to the reporting person, the Company withheld 6,022 shares to cover the reporting person's tax withholding obligation with respect to the vesting of such RSUs.
2. F2. Includes 35,176 unvested RSUs.

Key Figures

Shares withheld for taxes: 6,022 shares Price per share: $2.60 Shares held after transaction: 175,793 shares +2 more

5 metrics

Shares withheld for taxes 6,022 shares Tax-withholding disposition on July 15, 2026 related to RSU vesting

Price per share $2.60 Value used for the 6,022-share tax-withholding disposition

Shares held after transaction 175,793 shares Direct Class A Common Stock holdings of the CFO following the event

RSUs vested 17,338 RSUs Restricted stock units that vested, triggering the tax-withholding event

Unvested RSUs included 35,176 RSUs Unvested RSUs included within the CFO’s reported post-event holdings

Key Terms

restricted stock units, tax withholding obligation, unvested RSUs

3 terms

restricted stock units financial

"Upon the vesting of 17,338 restricted stock units ("RSUs") previously granted"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

tax withholding obligation financial

"withheld 6,022 shares to cover the reporting person's tax withholding obligation"

unvested RSUs financial

"Includes 35,176 unvested RSUs."

FAQ

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

What insider transaction did System1 (SST) report for its CFO?

System1 CFO Kidambi Tridivesh had 6,022 shares of Class A Common Stock withheld on July 15, 2026, at $2.60 per share. The shares were withheld to satisfy tax obligations arising from the vesting of 17,338 restricted stock units (RSUs).

Was the System1 (SST) CFO’s share disposition a market sale?

No. The 6,022 shares reported for the System1 CFO were withheld by the company to cover a tax withholding obligation when 17,338 RSUs vested. The disclosure does not describe an open-market sale by the CFO.

How many System1 (SST) shares does the CFO hold after this transaction?

After the tax-withholding disposition, the System1 CFO directly holds 175,793 shares of Class A Common Stock. This total includes 35,176 unvested RSUs, which may settle into additional shares as they vest over time, subject to applicable conditions.

What RSUs vested for the System1 (SST) CFO in this event?

The report states that 17,338 restricted stock units (RSUs) previously granted to the System1 CFO vested. To cover the related tax withholding obligation, the company withheld 6,022 shares, with the remaining vested shares credited to the CFO’s holdings.

Was the System1 (SST) CFO’s transaction under a Rule 10b5-1 trading plan?

The report indicates the transaction was not made under a Rule 10b5-1 trading plan, as the Rule 10b5-1 checkbox is not marked as affirmatively used. The event reflects tax withholding tied to RSU vesting rather than a discretionary trading program.

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

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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^*

Kidambi Tridivesh

(Last) (First) (Middle)

4235 REDWOOD AVE

(Street)

LOS ANGELES CALIFORNIA 90066

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
System1, Inc. [ SST ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/15/2026

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
Class A Common Stock	07/15/2026		F		6,022(1)	D	$2.6	175,793(2)	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. Upon the vesting of 17,338 restricted stock units ("RSUs") previously granted to the reporting person, the Company withheld 6,022 shares to cover the reporting person's tax withholding obligation with respect to the vesting of such RSUs.

2. Includes 35,176 unvested RSUs.

Remarks:

	/s/ Daniel Weinrot, Attorney-in-Fact for Tridivesh Kidambi	07/17/2026
	** 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)