[144] INTEGRAL AD SCIENCE HOLDING CORP. SEC Filing

Rhea-AI Filing Summary

Integral Ad Science Holding Corp. (IAS) insider filing on Form 144 notifies the market that 3,527 common shares are proposed for sale through Fidelity Brokerage Services LLC on 10/03/2025 on NASDAQ, with an aggregate market value of $35,904.86. The shares were acquired by Restricted Stock Vesting on 10/01/2025 and are noted as compensation. The filer also disclosed four prior sales during the past three months, including a sale of 25,901 shares on 09/24/2025 that generated $263,771.71. The form includes the filer representation that they are not aware of undisclosed material adverse information about the issuer.

Insights

Insider Compliance Analyst

Insider plans to sell vested restricted shares: 3,527 on 10/03/2025.

The filing shows the securities were acquired by Restricted Stock Vesting on 10/01/2025 and are being sold as compensation, which is a common post-vesting disposition method reported on Form 144.

The filer disclosed multiple prior sales in the past three months, including 25,901 shares on 09/24/2025, which the filing records as completed transactions. The notice includes the required certification that the seller has no undisclosed material adverse information.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	3527	35904.86	166163514	10/03/2025	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	10/01/2025	Restricted Stock Vesting	Issuer			3527	10/01/2025	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Alexis Gil II 12 E 49th Street 20th Floor New York NY 10017	Common	07/07/2025	1962	16539.47
Alexis Gil II 12 E 49th Street 20th Floor New York NY 10017	Common	09/03/2025	2784	24995.59
Alexis Gil II 12 E 49th Street 20th Floor New York NY 10017	Common	09/24/2025	25901	263771.71
Alexis Gil II 12 E 49th Street 20th Floor New York NY 10017	Common	10/02/2025	1992	20280.15

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)