DTST · Data Storage Corp

Represents shares of the Issuer's common stock sold to satisfy tax withholding obligations of Charles M. Piluso (the "Reporting Person").

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.80 through $3.83. The Reporting Person undertakes to provide to the registrant, any security holder of the registrant, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

Represents shares of the Issuer's common stock sold to satisfy tax withholding obligations of Charles M. Piluso (the "Reporting Person").

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.80 through $3.92. The Reporting Person undertakes to provide to the registrant, any security holder of the registrant, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

Represents shares of the Issuer's common stock sold to satisfy tax withholding obligations of Charles M. Piluso (the "Reporting Person").

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.90 through $3.95. The Reporting Person undertakes to provide to the registrant, any security holder of the registrant, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

Represents the shares of the Issuer's common stock underlying a grant of a restricted stock unit ("RSU") to the Reporting Person on February 13, 2026, which will vest one-third on each of May 20, 2027, May 20, 2028, and May 20, 2029. RSUs convert into common stock on a one-for-one basis.

These options ("Options") will vest and become exercisable one-third on each of May 20, 2027, May 20, 2028, and May 20, 2029.

These options ("Options") will vest and become exercisable one-third on each of May 20, 2027, May 20, 2028, and May 20, 2029. The exercise price of these Options is equal to 110% of the closing price of the Issuer's common stock as of the date of grant.

Represents the shares of the Issuer's common stock underlying a grant of a restricted stock unit ("RSU") to the Reporting Person on February 13, 2026, which will vest one-third on each of May 20, 2027, May 20, 2028, and May 20, 2029. RSUs convert into common stock on a one-for-one basis.

Represents the shares of the Issuer's common stock underlying a grant of a restricted stock unit ("RSU") to the Reporting Person on February 9, 2026. This amendment to Form 4 is filed to correctly disclose that such RSU award will vest in full on May 20, 2026 (having been inadvertently disclosed as vesting in full on the date of grant in the original Form 4 filed by the Reporting Person on February 11, 2026). RSUs convert into common stock on a one-for-one basis.

Restricted stock units ("RSUs") convert into common stock on a one-for-one basis.

Represents the shares of the Issuer's common stock underlying a RSU grant to the Reporting Person on January 29, 2026, which RSUs vest in full on the date of the Issuer's 2026 Annual Meeting of Stockholders, subject to the Reporting Person's continued service to the Issuer through the vesting date.

Restricted stock units ("RSUs") convert into common stock on a one-for-one basis.

Represents the shares of the Issuer's common stock underlying a RSU grant to the Reporting Person on January 29, 2026, which RSUs vest in full on the date of the Issuer's 2026 Annual Meeting of Stockholders, subject to the Reporting Person's continued service to the Issuer through the vesting date.

Restricted stock units ("RSUs") convert into common stock on a one-for-one basis.

Represents the shares of the Issuer's common stock underlying a RSU grant to the Reporting Person on January 29, 2026, which RSUs vest in full on the date of the Issuer's 2026 Annual Meeting of Stockholders, subject to the Reporting Person's continued service to the Issuer through the vesting date.

Restricted stock units ("RSUs") convert into common stock on a one-for-one basis.

Represents the shares of the Issuer's common stock underlying a RSU grant to the Reporting Person on January 29, 2026, which RSUs vest in full on the date of the Issuer's 2026 Annual Meeting of Stockholders, subject to the Reporting Person's continued service to the Issuer through the vesting date.

Restricted stock units ("RSUs") convert into common stock on a one-for-one basis.

Represents the shares of the Issuer's common stock underlying a RSU grant to the Reporting Person on January 29, 2026, which RSUs vest in full on the date of the Issuer's 2026 Annual Meeting of Stockholders, subject to the Reporting Person's continued service to the Issuer through the vesting date.

Restricted stock units ("RSUs") convert into common stock on a one-for-one basis.

Represents the shares of the Issuer's common stock underlying a RSU grant to the Reporting Person on January 29, 2026, which RSUs vest in full on the date of the Issuer's 2026 Annual Meeting of Stockholders, subject to the Reporting Person's continued service to the Issuer through the vesting date.

Restricted stock units ("RSUs") convert into common stock on a one-for-one basis.

Represents the shares of the Issuer's common stock underlying a RSU grant to the Reporting Person on January 29, 2026, which RSUs vest in full on the date of the Issuer's 2026 Annual Meeting of Stockholders, subject to the Reporting Person's continued service to the Issuer through the vesting date.

Restricted stock units ("RSUs") convert into common stock on a one-for-one basis.

Represents the shares of the Issuer's common stock underlying a RSU grant to the Reporting Person on January 29, 2026, which RSUs vest in full on the date of the Issuer's 2026 Annual Meeting of Stockholders, subject to the Reporting Person's continued service to the Issuer through the vesting date.

Restricted stock units ("RSUs") convert into common stock on a one-for-one basis.

Represents the shares of the Issuer's common stock underlying a RSU grant to the Reporting Person on January 29, 2026, which RSUs vest in full on the date of the Issuer's 2026 Annual Meeting of Stockholders, subject to the Reporting Person's continued service to the Issuer through the vesting date.

Represents sale of shares to issuer pursuant to issuer tender offer exempt under Rule 16b-3.

The Reporting Person is a Managing Member of Piluso Family Associates, together with his spouse.

Represents sale of shares to issuer pursuant to issuer tender offer exempt under Rule 16b-3.

Represents sale of shares to issuer pursuant to issuer tender offer exempt under Rule 16b-3.

Includes 10,955 shares of common stock that were inadvertently excluded from previous reports filed by the reporting person.

Represents sale of shares to issuer pursuant to issuer tender offer exempt under Rule 16b-3.

Reflects indirect holding of 7,500 shares of common stock that were inadvertently excluded from previous reports filed by the reporting person.

Systems Trading, Inc. is a company owned by the reporting person and of which the reporting person currently serves as Chief Executive Officer and President.

Represents sale of shares to issuer pursuant to issuer tender offer exempt under Rule 16b-3.

Represents sale of shares to issuer pursuant to issuer tender offer exempt under Rule 16b-3.

Represents sale of shares to issuer pursuant to issuer tender offer exempt under Rule 16b-3.

Represents sale of shares to issuer pursuant to issuer tender offer exempt under Rule 16b-3.

Represents sale of shares to issuer pursuant to issuer tender offer exempt under Rule 16b-3.

The Reporting Person's spouse is the beneficiary of The Lasata 2012 Trust dated 5/4/12 (the "Lasata Trust") and the Reporting Person's spouse, together with Lawrence Maglione, a director of the Issuer, are the co-trustees of the Lasata Trust.

Represents sale of shares to issuer pursuant to issuer tender offer exempt under Rule 16b-3.

The Reporting Person is the beneficiary of The Bella Vita 2012 Trust dated 5/4/12 (the "Bella Vita Trust") and the Reporting Person, together with his spouse, are the co-trustees of the Bella Vita Trust.

Represents sale of shares to issuer pursuant to issuer tender offer exempt under Rule 16b-3.

Includes 9,500 shares of common stock that were inadvertently excluded from previous reports filed by the reporting person.

Represents sale of shares to issuer pursuant to issuer tender offer exempt under Rule 16b-3.

The Reporting Person is a Managing Member of Piluso Family Associates LLC, together with his spouse.

Represents sale of shares to issuer pursuant to issuer tender offer exempt under Rule 16b-3.

Reflects a correction to the number of shares owned by the reporting person. Due to an administrative oversight, the reporting person's number of securities beneficially owned following the reported transaction in Item 5 of Table I in prior Form 4s was overstated by 20,735 shares.

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.

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.

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.

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.

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.

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.

Represents shares withheld to cover the exercise price of the options exercised. On December 15, 2025, the reporting person filed a Form 4 which inadvertently underreported the number of shares withheld by the Company to cover the exercise price in connection with the exercise of an option by 12 shares. As reported in this amendment, 10,202 shares were in fact withheld.

Represents shares of common stock issued upon exercise of a stock option that was issued to the Reporting Person on June 30, 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 10 years.

Represents shares of common stock issued upon exercise of a stock option that was issued to the Reporting Person on March 31, 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 10 years.

Represents shares of common stock issued upon exercise of a stock option that was issued to the Reporting Person on December 30, 2022, 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 10 years.

Represents shares of common stock issued upon exercise of a stock option that was issued to the Reporting Person on March 31, 2022 which were fully vested on the third anniversary of the date of grant. The Option is exercisable for a term of 10 years.

Represents shares of common stock issued upon exercise of a stock option that was issued to the Reporting Person on September 30, 2022, 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 10 years.

Represents shares of common stock issued upon exercise of a stock option that was issued to the Reporting Person on December 31, 2023, 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 10 years.

Represents shares withheld to cover the exercise price of the options exercised.

Represents shares of common stock issued upon exercise of a stock option that was issued to the Reporting Person on June 30, 2022 which were fully vested on the third anniversary of the date of grant. The Option is exercisable for a term of 10 years.

Represents shares of common stock issued upon exercise of a stock option that was issued to the Reporting Person on September 30, 2022, 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 10 years.