[Form 4] Backblaze, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Backblaze, Inc. (BLZE) reported an insider equity transaction by its CEO and Chairperson, who is also a director. On 11/20/2025, 27,793 shares of Class A Common Stock were withheld by the company at a price of $4.33 per share to satisfy tax withholding obligations related to the vesting of restricted stock units (RSUs). The filing states that no shares were sold by the executive to cover this tax liability. Following this transaction, the executive directly beneficially owns 2,096,013 shares of Backblaze Class A Common Stock.

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

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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^*

Budman Gleb

(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)

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

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)		27,793	D	$4.33	2,096,013	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.

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 CEO and Chairperson of Backblaze, Inc. (BLZE) reported an insider transaction where 27,793 shares of Class A Common Stock were withheld by the company on 11/20/2025 to cover tax obligations from RSU vesting.

Was any stock actually sold by the Backblaze (BLZE) insider in this transaction?

No. The filing explains that the 27,793 shares of Class A Common Stock were withheld by the issuer to cover tax withholding obligations tied to RSU vesting, and that no shares were sold by the reporting person.

How many Backblaze (BLZE) shares does the CEO own after this Form 4 transaction?

After the reported transaction, the CEO and Chairperson directly beneficially owns 2,096,013 shares of Backblaze Class A Common Stock.

What is the role of the reporting person in Backblaze (BLZE)?

The reporting person is a director, and also serves as an officer with the title CEO and Chairperson of Backblaze, Inc.

What does the transaction code F mean in the Backblaze (BLZE) Form 4?

The transaction code F indicates that shares were withheld to pay tax withholding obligations in connection with the vesting of restricted stock units (RSUs).

At what price were the withheld Backblaze (BLZE) shares valued?

The 27,793 withheld shares of Backblaze Class A Common Stock were valued at a price of $4.33 per share for the tax withholding transaction.