Data Storage director sells 3,500 shares at $2.93

Data Storage Corp (DTST) director Thomas Kempster reported selling 3,500 shares of common stock on September 11, 2026 in an open-market or private transaction.

Available on EDGAR 09/14/2026 - 09:25 PM EDT Accepted by SEC EDGAR 09/14/2026 - 09:25 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Data Storage Corp (DTST) director Thomas Kempster reported selling 3,500 shares of common stock on September 11, 2026 in an open-market or private transaction. The shares were sold to satisfy tax withholding obligations, at a weighted average price of $2.925 per share, within a range of $2.90 to $2.97. After this sale, Kempster holds 18,500 shares of DTST common stock directly, and no Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Net Seller: 3,500 shares

Net Sell 1 txn

Insider Kempster Thomas

Role Director

Sold 3,500 shs ($10K)

Share of Position Sold 15.9%

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	3,500	$2.925	$10K

Holdings After Transaction: Common Stock — 18,500 shares (Direct)

Holdings Before and After: Common Stock, 22,000 to 18,500 shares (Direct)

Other Insiders: 3 other insiders reported open-market sales of this stock in the 30 days up to this filing.

Footnotes (2)

1. F1. Represents shares of the Issuer's common stock sold to satisfy tax withholding obligations of Thomas Kempster (the "Reporting Person").
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.90 through $2.97. 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.

Key Figures

Shares sold: 3,500 shares Weighted average sale price: $2.925 per share Sale price range: $2.90–$2.97 per share +2 more

5 metrics

Shares sold 3,500 shares Common stock sold by director Thomas Kempster on September 11, 2026

Weighted average sale price $2.925 per share Average price for the 3,500 DTST shares sold on September 11, 2026

Sale price range $2.90–$2.97 per share Price range of multiple transactions included in the reported sale

Shares held after transaction 18,500 shares Direct DTST common stock holdings of Thomas Kempster after the sale

Net shares sold in filing 3,500 shares Total net sell volume reported in this Form 4 for DTST

Key Terms

weighted average price, tax withholding obligations, common stock

3 terms

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

tax withholding obligations financial

"shares ... sold to satisfy tax withholding obligations of Thomas Kempster"

common stock financial

"Represents shares of the Issuer's common stock sold to satisfy tax withholding"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did DTST report for director Thomas Kempster?

Director Thomas Kempster reported a sale of 3,500 DTST common shares on September 11, 2026. The transaction was reported as a sale in an open-market or private transaction and left him with 18,500 shares held directly afterward.

At what price were the 3,500 DTST shares sold by Thomas Kempster?

The 3,500 DTST shares were sold at a weighted average price of $2.925 per share. The filing states the shares were sold in multiple transactions at prices ranging from $2.90 to $2.97 per share.

Why did DTST director Thomas Kempster sell 3,500 shares?

The filing states the 3,500 DTST shares sold by director Thomas Kempster represent shares sold to satisfy his tax withholding obligations in connection with his holdings, rather than a discretionary sale for other purposes.

How many DTST shares does Thomas Kempster own after this Form 4 transaction?

After the September 11, 2026 sale, director Thomas Kempster directly owns 18,500 shares of Data Storage Corp common stock, according to the reported post-transaction holdings in the Form 4.

Was the DTST insider sale by Thomas Kempster under a Rule 10b5-1 plan?

No. The filing’s Rule 10b5-1 checkbox is not marked as an affirmative plan, and there is no footnote indicating a trading plan, so no Rule 10b5-1 plan is reported for this transaction.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Kempster Thomas

(Last) (First) (Middle)

C/O DATA STORAGE CORPORATION

244 5TH AVENUE, SUITE 2821

(Street)

NEW YORK NEW YORK 10001

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Data Storage Corp [ DTST ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/11/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/11/2026		S		3,500(1)	D	$2.925(2)	18,500	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents shares of the Issuer's common stock sold to satisfy tax withholding obligations of Thomas Kempster (the "Reporting Person").

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.90 through $2.97. 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.

	/s/ Wendy Schmittzeh, Attorney-in-fact for Thomas Kempster	09/14/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)