Callahan Michael James 4

4 · Datadog, Inc. · Filed May 14, 2026

AI-generated summary of this filing

Updated May 14, 2026

Datadog (DDOG) Director Michael Callahan Converts 5,000 Shares

What Happened

Michael James Callahan, a Datadog director, converted 5,000 shares of Class B common stock into 5,000 shares of Class A common stock on May 12, 2026. The filing shows an acquired entry for 5,000 shares (conversion, price N/A) and a corresponding derivative disposition of 5,000 shares at $0.00 — i.e., no cash proceeds were received.

Key Details

Transaction date: 2026-05-12; Form 4 filed: 2026-05-14 (filed timely).
Acquired: 5,000 Class A shares via conversion (price listed as N/A).
Disposed (derivative): 5,000 Class B shares at $0.00 (reflects the conversion event).
Shares held after transaction: not specified in the filing.
Footnotes:
- F1: Each Class B share is convertible into one Class A share at the holder’s option and will convert automatically in certain situations; no expiration date.
- F2: The shares are held by The Callahan-Thernstrom Family Trust, of which Mr. Callahan is trustee.

Context

This was a non‑cash conversion of share class (a reclassification), not a market sale or open‑market purchase. Conversions like this do not necessarily indicate a change in sentiment, as they often simply convert voting/ownership units between share classes.

Form 4

Period: 2026-05-12

Director

Transactions

Conversion
Class A Common Stock
[F1][F2]
2026-05-12+5,000→ 17,496 total(indirect: By Trust)
Conversion
Class B Common Stock
[F1][F2]
2026-05-12−5,000→ 235,542 total(indirect: By Trust)
→ Class A Common Stock (5,000 underlying)

Holdings

Footnotes (2)

[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.

Signature

/s/ Kerry Acocella, Attorney-in-Fact|2026-05-14

1 file