Oleg Bershadsky - 29 Jun 2021 Form 3 Insider Report for INTEGRAL AD SCIENCE HOLDING CORP. (IAS)

Signature
/s/ Micah Nessan, by Power of Attorney
Issuer symbol
IAS
Transactions as of
29 Jun 2021
Net transactions value
$0
Form type
3
Filing time
29 Jun 2021, 20:10:03 UTC
Next filing
17 Jun 2022

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
holding IAS Option (Right to Buy) 29 Jun 2021 Common Stock, $0.001 par value 146,400 $4.13 Direct F1
holding IAS Option (Right to Buy) 29 Jun 2021 Common Stock, $0.001 par value 146,400 $8.58 Direct F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 These options were granted on March 27, 2019 and vest 25% after one year and in equal quarterly installments over the next three years.
F2 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