Michael James Callahan - 12 Dec 2025 Form 4 Insider Report for Datadog, Inc. (DDOG)

Role
Director
Signature
/s/ Kerry Acocella, Attorney-in-Fact
Issuer symbol
DDOG
Transactions as of
12 Dec 2025
Net transactions value
$0
Form type
4
Filing time
16 Dec 2025, 16:10:50 UTC
Previous filing
10 Nov 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Callahan Michael James Director C/O DATADOG, INC., 620 8TH AVENUE, 45TH FLOOR, NEW YORK /s/ Kerry Acocella, Attorney-in-Fact 16 Dec 2025 0001784030

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction DDOG Class A Common Stock Conversion of derivative security $0 +15,000 +120% $0.000000 27,496 12 Dec 2025 By Trust F1, F2
transaction DDOG Class A Common Stock Gift $0 -15,000 -55% $0.000000 12,496 12 Dec 2025 By Trust F2, F3
holding DDOG Class A Common Stock 19,612 12 Dec 2025 Direct

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
transaction DDOG Class B Common Stock Conversion of derivative security $0 -15,000 -5.9% $0.000000 240,542 12 Dec 2025 Class A Common Stock 15,000 By Trust F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon the earliest of: (i) any transfer, whether or not for value, except for certain "Permitted Transfers" as defined in the Issuer's amended and restated certificate of incorporation, (ii) the death of the Reporting Person in the case of shares held directly or in a trustee capacity, and (iii) the tenth anniversary of the Issuer's initial public offering of its Class A Common Stock.
F2 The Shares are held by The Callahan-Thernstrom Family Trust, of which Reporting Person is Trustee.
F3 Shares donated to a donor-advised fund, which will use the gifted shares for charitable purposes.