=== SEC Form 4 — Statement of Changes in Beneficial Ownership ===
Document Type: 4
Period of Report: 2026-09-03
10b5-1 Pre-arranged Plan: Yes
--- Issuer ---
Name: Datadog, Inc. (DDOG)
CIK: 0001561550
--- Reporting Owner ---
Name: Blitzer Adam
CIK: 0001861590
Role: Officer (Chief Operating Officer)
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Class A Common Stock
Date: 2026-09-03 | Code: S (Open market sale)
Shares: -300 | Price: $211.68
Total Value: $63,504.99
Shares Owned After: 249,659 | Ownership: D (Direct)
Footnotes:
[F1] Shares sold pursuant to a 10b5-1 plan dated August 22, 2025.
[F2] Price reported is a weighted-average sales price. The shares were sold at prices ranging from $211.21 to $211.96. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
[Transaction #2]
Security: Class A Common Stock
Date: 2026-09-03 | Code: S (Open market sale)
Shares: -700 | Price: $212.76
Total Value: $148,928.99
Shares Owned After: 248,959 | Ownership: D (Direct)
Footnotes:
[F1] Shares sold pursuant to a 10b5-1 plan dated August 22, 2025.
[F3] Price reported is a weighted-average sales price. The shares were sold at prices ranging from $212.25 to $213.17. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
[Transaction #3]
Security: Class A Common Stock
Date: 2026-09-03 | Code: S (Open market sale)
Shares: -5,002 | Price: $213.94
Total Value: $1,070,144.89
Shares Owned After: 243,957 | Ownership: D (Direct)
Footnotes:
[F1] Shares sold pursuant to a 10b5-1 plan dated August 22, 2025.
[F4] Price reported is a weighted-average sales price. The shares were sold at prices ranging from $213.29 to $214.28. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
[Transaction #4]
Security: Class A Common Stock
Date: 2026-09-03 | Code: S (Open market sale)
Shares: -4,730 | Price: $214.73
Total Value: $1,015,664.86
Shares Owned After: 239,227 | Ownership: D (Direct)
Footnotes:
[F1] Shares sold pursuant to a 10b5-1 plan dated August 22, 2025.
[F5] Price reported is a weighted-average sales price. The shares were sold at prices ranging from $214.29 to $215.19. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
[Transaction #5]
Security: Class A Common Stock
Date: 2026-09-03 | Code: S (Open market sale)
Shares: -993 | Price: $215.61
Total Value: $214,098.15
Shares Owned After: 238,234 | Ownership: D (Direct)
Footnotes:
[F1] Shares sold pursuant to a 10b5-1 plan dated August 22, 2025.
[F6] Price reported is a weighted-average sales price. The shares were sold at prices ranging from $215.34 to $216.08. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
[Transaction #6]
Security: Class A Common Stock
Date: 2026-09-03 | Code: S (Open market sale)
Shares: -107 | Price: $217.18
Total Value: $23,237.72
Shares Owned After: 238,127 | Ownership: D (Direct)
Footnotes:
[F1] Shares sold pursuant to a 10b5-1 plan dated August 22, 2025.
[F7] Price reported is a weighted-average sales price. The shares were sold at prices ranging from $216.39 to $217.23. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
[Transaction #7]
Security: Class A Common Stock
Date: 2026-09-03 | Code: S (Open market sale)
Shares: -100 | Price: $217.80
Total Value: $21,780.00
Shares Owned After: 238,027 | Ownership: D (Direct)
Footnotes:
[F1] Shares sold pursuant to a 10b5-1 plan dated August 22, 2025.
[Transaction #8]
Security: Class A Common Stock
Date: 2026-09-03 | Code: S (Open market sale)
Shares: -100 | Price: $220.15
Total Value: $22,015.00
Shares Owned After: 237,927 | Ownership: D (Direct)
Footnotes:
[F1] Shares sold pursuant to a 10b5-1 plan dated August 22, 2025.
--- Footnotes (Complete Index) ---
F1: Shares sold pursuant to a 10b5-1 plan dated August 22, 2025.
F2: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $211.21 to $211.96. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F3: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $212.25 to $213.17. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F4: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $213.29 to $214.28. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F5: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $214.29 to $215.19. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F6: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $215.34 to $216.08. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F7: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $216.39 to $217.23. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
--- Signature ---
/s/ /s/ Kerry Acocella, Attorney-in-Fact (2026-09-08)
