Data Storage director sells 3,991 shares at $3.05

DTST director Clifford Stein sold shares mainly to cover tax withholding, retaining 18,009 common shares.

Rhea-AI Filing Summary

Data Storage Corp (DTST) director Clifford Stein reported a sale of common stock on September 10, 2026. He sold 3,991 shares of DTST common stock primarily to satisfy tax withholding obligations related to his holdings. The shares were sold at a weighted average price of $3.05 per share, in multiple trades between $2.98 and $3.0816. After these transactions, Stein directly holds 18,009 DTST common shares. No Rule 10b5-1 trading plan is reported for this transaction.

Insider Trade Summary

Net Seller: 3,991 shares

Net Sell 1 txn

Insider Stein Clifford

Role Director

Sold 3,991 shs ($12K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	3,991	$3.05	$12K

Holdings After Transaction: Common Stock — 18,009 shares (Direct)

Footnotes (2)

1. F1. Represents shares of the Issuer's common stock sold to satisfy tax withholding obligations of Clifford Stein (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 $2.98 through $3.0816. 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: 3,991 shares Weighted average sale price: $3.05 per share Sale price range: $2.98–$3.0816 per share +1 more

4 metrics

Shares sold 3,991 shares Common stock sold by director on September 10, 2026

Weighted average sale price $3.05 per share Average price for 3,991 DTST shares sold

Sale price range $2.98–$3.0816 per share Range of prices for the multiple transactions on September 10, 2026

Shares owned after transaction 18,009 shares Director’s direct DTST common stock holdings following the sale

Key Terms

tax withholding obligations, weighted average price, open market or private transaction

3 terms

tax withholding obligations financial

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

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.

open market or private transaction financial

"Sale in open market or private transaction"

FAQ

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

What insider transaction did DTST director Clifford Stein report?

DTST director Clifford Stein reported selling 3,991 shares of common stock on September 10, 2026, in open-market or private transactions primarily to satisfy tax withholding obligations, and now directly holds 18,009 shares.

At what price were the DTST shares sold in this Form 4 filing?

The DTST shares were sold at a weighted average price of $3.05 per share. The sales occurred in multiple transactions at prices ranging from $2.98 to $3.0816 per share.

How many DTST shares does Clifford Stein own after the reported sale?

After the reported sale, Clifford Stein directly owns 18,009 shares of Data Storage Corp common stock, as stated in the Form 4 filing.

Why did Clifford Stein sell DTST shares according to the Form 4?

The filing states that the 3,991 DTST shares were sold to satisfy tax withholding obligations of Clifford Stein in connection with his holdings of the company’s common stock.

Was the DTST insider sale made under a Rule 10b5-1 trading plan?

No. The Form 4 indicates the Rule 10b5-1 checkbox is not marked and does not otherwise state that the September 10, 2026 DTST share sale was made under a Rule 10b5-1 trading plan.

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

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Available on EDGAR 09/11/2026 - 08:32 PM EDT Accepted by SEC EDGAR 09/11/2026 - 08:32 PM EDT Learn about SEC filing dates

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^*

Stein Clifford

(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)
09/10/2026

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	09/10/2026		S		3,991(1)	D	$3.05(2)	18,009	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 Clifford Stein (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 $2.98 through $3.0816. 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 Clifford Stein	09/11/2026
	** 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)