[Form 4] Backblaze, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Backblaze, Inc. (BLZE) Chief Financial Officer Form 4 filing reports a routine equity transaction linked to restricted stock unit vesting. On 11/20/2025, the CFO had 6,708 shares of Class A common stock withheld at $4.33 per share to satisfy tax withholding obligations arising from RSU vesting, and no shares were sold in the open market. Following this transaction, the CFO beneficially owned 274,748 shares of Class A common stock, which includes 2,500 shares previously acquired under the company’s Employee Stock Purchase Plan on November 19, 2025.

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^*

Suidan Marc

(Last) (First) (Middle)

201 BALDWIN AVE.

(Street)

SAN MATEO CA 94401

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Backblaze, Inc. [ BLZE ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
11/20/2025

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

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

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

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
Class A Common Stock	11/20/2025		F(1)		6,708	D	$4.33	274,748(2)	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. The shares of Class A Common Stock were withheld by the Issuer to cover tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs"). No shares were sold by the Reporting Person to satisfy this tax liability.

2. Includes 2,500 shares of Class of A Common Stock previously acquired under the Issuer's Employee Stock Purchase Plan on November 19, 2025.

Remarks:

	/s/ Evangeline Cheung, Attorney-in-Fact	11/24/2025
	** 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.

FAQ

What insider transaction did Backblaze (BLZE) report in this Form 4?

The Form 4 shows the CFO had 6,708 shares of Class A common stock withheld on 11/20/2025 to cover tax obligations from vested RSUs.

Did the Backblaze CFO sell BLZE shares in the market?

No. The filing states the Class A Common Stock shares were withheld by the issuer to cover tax withholding, and no shares were sold by the reporting person.

How many Backblaze (BLZE) shares does the CFO beneficially own after the transaction?

After the reported transaction, the CFO beneficially owns 274,748 shares of Backblaze Class A common stock.

What price per share was used for the BLZE tax withholding in this Form 4?

The shares withheld to cover tax obligations were valued at $4.33 per share according to the Form 4.

Does the Backblaze CFO hold shares acquired through an Employee Stock Purchase Plan?

Yes. The reported holdings include 2,500 shares of Class A common stock previously acquired under the Employee Stock Purchase Plan on November 19, 2025.

What is the relationship of the reporting person to Backblaze (BLZE)?

The reporting person is an officer of Backblaze, serving as its Chief Financial Officer.