[Form 4] INTEGRAL AD SCIENCE HOLDING CORP. Insider Trading Activity

Rhea-AI Filing Summary

Insider sale under Rule 10b5-1: An officer of Integral Ad Science Holding Corp. (IAS) reported a sale of 3,527 shares of common stock on 10/03/2025 at a sale price of $10.18 per share. After the transaction the reporting person beneficially owned 139,621 shares. The filing states the trades were executed under a Rule 10b5-1 trading plan adopted on 6/12/2025.

The Form 4 was signed by an authorized representative on 10/07/2025. No derivative transactions or other changes in beneficial ownership were reported on this form.

Positive

• Sale executed under Rule 10b5-1, indicating a pre-established trading plan adopted on 6/12/2025
• Modest reduction of holdings: only 3,527 shares sold leaving 139,621 shares

Negative

• No negative points disclosed in the filing; no derivatives or other material changes reported

Insights

Corporate Governance Analyst

Officer sale executed under a pre-established 10b5-1 plan; modest share reduction.

The reported sale of 3,527 shares at $10.18 reduced the officer's direct holdings to 139,621 shares. Using a Rule 10b5-1 plan indicates the transactions were pre-programmed and intended to provide an affirmative defense against insider trading claims.

Dependency and risk center on the plan's terms and timing; confirm whether the plan includes periodic sales or was a one-off. Near-term items to watch include any additional Form 4 filings that would show follow-up transactions or plan termination.

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).

X

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^*

Gil Alexis II

(Last) (First) (Middle)

C/O INTEGRAL AD SCIENCE HOLDING CORP.

12 E. 49TH STREET, 20TH FLOOR

(Street)

NEW YORK NY 10017

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
INTEGRAL AD SCIENCE HOLDING CORP. [ IAS ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
10/03/2025

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

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

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

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, $0.001 par value	10/03/2025		S		3,527(1)	D	$10.18	139,621	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. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan. Such Rule 10b5-1 trading plan was adopted by the Reporting Person on June 12, 2025.

Remarks:

	/s/ Yossi Almani, by Power of Attorney	10/07/2025
	** 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.

FAQ

What did IAS insider Gil Alexis II report on Form 4?

The officer reported a sale of 3,527 shares of IAS common stock on 10/03/2025 at $10.18 per share, leaving 139,621 shares beneficially owned.

Was the sale part of a 10b5-1 trading plan for IAS insider filings?

Yes. The filing states the sales were effected pursuant to a Rule 10b5-1 trading plan adopted on 6/12/2025.

Did the Form 4 report any option exercises or derivative transactions for IAS?

No. Table II (derivative securities) shows no transactions or holdings reported on this Form 4.

When was the Form 4 signed and filed?

The signature block shows the form was signed by a representative on 10/07/2025.

How many shares does the reporting person hold after the sale?

The reporting person beneficially owned 139,621 shares following the reported transaction.