Data Storage Corp — Director's Dealing 2025

Dec 18, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Data Storage Corp (DTST)
CIK: 0001419951
Period of Report: 2025-12-16

Reporting Person: Schwartz Harold J (Director, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-12-16	Common Stock	M	9804	$1.96	Acquired	910563	Direct
2025-12-16	Common Stock	M	16667	$2.00	Acquired	927230	Direct
2025-12-16	Common Stock	M	10352	$3.22	Acquired	937582	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-12-16	Stock Option	$1.96	M	9804	Acquired		Common Stock (9804)	Direct
2025-12-16	Stock Option	$2.00	M	16667	Acquired		Common Stock (16667)	Direct
2025-12-16	Stock Option	$3.22	M	10352	Acquired		Common Stock (10352)	Direct

Footnotes

F1: Represents shares of common stock issued upon exercise of the unexercised portion of a stock option that was issued to the Reporting Person on March 1, 2023, the unexercised portion of which vested in full immediately upon consummation of the divestiture of the Issuer's CloudFirst business on September 11, 2025. The Option is exercisable for a term of 5 years.

F2: Represents shares of common stock issued upon exercise of the unexercised portion of a stock option that was issued to the Reporting Person on April 10, 2023, the unexercised portion of which vested in full immediately upon consummation of the divestiture of the Issuer's CloudFirst business on September 11, 2025. The Option is exercisable for a term of 5 years.

F3: Represents shares of common stock issued upon exercise of the unexercised portion of a stock option that was issued to the Reporting Person on January 2, 2024, the unexercised portion of which vested in full immediately upon consummation of the divestiture of the Issuer's CloudFirst business on September 11, 2025. The Option is exercisable for a term of 5 years.