Integral Ad Science Holding (IAS) Form 3 INTEGRAL AD SCIENCE HOLDING / OLEG BERSHADSKY ownership change

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

BERSHADSKY OLEG

(Last) (First) (Middle)

95 MORTON STREET, 8TH FLOOR

(Street)

NEW YORK NY 10014

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
06/29/2021

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

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

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

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Option (Right to Buy)	(1)	03/27/2029	Common Stock, $0.001 par value	146,400	4.13	D
Option (Right to Buy)	(2)	10/01/2030	Common Stock, $0.001 par value	146,400	8.58	D

Explanation of Responses:

1. These options were granted on March 27, 2019 and vest 25% after one year and in equal quarterly installments over the next three years.

2. These options were granted on October 1, 2020 and vest 25% after one year and in equal quarterly installments over the next three years.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Micah Nessan, by Power of Attorney	06/29/2021
	** 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 5 (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).
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