[144] INTEGRAL AD SCIENCE HOLDING CORP. SEC Filing

Rhea-AI Filing Summary

Integral Ad Science Holding Corp. insider notice reports a proposed sale of 9,264 common shares held through a restricted stock vesting event on 10/03/2025, with an aggregate market value of $94,430.73. The securities are to be sold through Fidelity Brokerage Services LLC on or about 10/07/2025 on NASDAQ. The filer also disclosed four prior open-market sales this year totaling 50,378 shares for gross proceeds of $448,060.61 across 07/08/2025 to 10/03/2025. Outstanding shares are listed as 166,163,514, so the proposed sale and recent disposals are a small fraction of total equity. The notice states the shares were acquired by restricted stock vesting and paid as compensation.

Positive

• Disclosure compliance filed for proposed sale under Rule 144
• Shares arose from compensation (restricted stock vesting) on 10/03/2025

Negative

• Insider selling occurred totaling 50,378 shares year-to-date
• Upcoming sale of 9,264 shares valued at $94,430.73

Insights

Corporate Governance Analyst

TL;DR: Routine insider sale after restricted stock vesting; small versus outstanding shares.

Insider sales tied to restricted stock vesting are common when compensation converts to tradable shares; this filing shows 9,264 shares from a 10/03/2025 vesting event, to be executed on 10/07/2025.

The cumulative sales disclosed this year total 50,378 shares, representing roughly 0.03% of the 166,163,514 shares outstanding, indicating limited dilution or insider exit pressure in percentage terms; monitor future Form 4/144 filings for changes in pace or size within the next months.

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

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	9264	94430.73	166163514	10/07/2025	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	10/03/2025	Restricted Stock Vesting	Issuer			9264	10/03/2025	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
Lisa M. Utzschneider 12 E 49th Street 20th Floor New York NY 10017	Common	07/08/2025	14904	123850.75
Lisa M. Utzschneider 12 E 49th Street 20th Floor New York NY 10017	Common	07/10/2025	8285	68666.08
Lisa M. Utzschneider 12 E 49th Street 20th Floor New York NY 10017	Common	08/06/2025	9922	80523.98
Lisa M. Utzschneider 12 E 49th Street 20th Floor New York NY 10017	Common	10/03/2025	17267	176019.80

144: Remarks and Signature

Remarks

Date of Notice

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)

FAQ

What does the Form 144 for IAS disclose about the sale?

It discloses a proposed sale of 9,264 common shares to be sold on or about 10/07/2025 through Fidelity Brokerage Services LLC with aggregate market value $94,430.73.

How were the shares acquired by the seller in the IAS filing?

The shares were acquired through restricted stock vesting on 10/03/2025 and payment was recorded as compensation.

How many shares has the insider sold recently according to the filing?

The filing lists four prior sales totalling 50,378 shares between 07/08/2025 and 10/03/2025, with gross proceeds of $448,060.61.

What percentage of IAS outstanding shares do these sales represent?

With 166,163,514 shares outstanding, the year-to-date disclosed sales represent roughly 0.03% of outstanding shares.

Through which broker will the proposed sale be executed?

The proposed sale is scheduled through Fidelity Brokerage Services LLC on the NASDAQ exchange.