CIFR CFO Gregory Mumford receives 375,000 RSUs with 3-year vest

Rhea-AI Filing Summary

Cipher Mining (CIFR) reported an insider equity award: Chief Financial Officer Gregory Mumford received 375,000 restricted stock units (RSUs) on October 14, 2025.

Each RSU represents the right to receive one share of common stock. The RSUs vest in three equal installments on October 14, 2026, October 14, 2027, and October 14, 2028, subject to continued service. The RSUs have no expiration date.

Following the reported transaction, 375,000 derivative securities were beneficially owned on a direct basis.

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

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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^*

Mumford Gregory J.D.

(Last) (First) (Middle)

C/O CIPHER MINING INC.

1 VANDERBILT AVENUE, FLOOR 54

(Street)

NEW YORK NY 10017

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Cipher Mining Inc. [ CIFR ]

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)
10/14/2025

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

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
Restricted Stock Units	(1)	10/14/2025		A		375,000		(2)	(1)	Common Stock	375,000	$0	375,000	D

Explanation of Responses:

1. Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs have no expiration date.

2. The RSUs will vest in equal installments on each of October 14, 2026, October 14, 2027 and October 14, 2028, subject to the Reporting Person's continuous service on the applicable vesting date.

Remarks:

	/s/ William Iwaschuk, Attorney-in-Fact for Gregory Mumford	10/16/2025
	** 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 did Cipher Mining (CIFR) disclose in the Form 4?

The CFO, Gregory Mumford, was granted 375,000 RSUs on October 14, 2025.

How do the RSUs for CIFR’s CFO vest?

They vest in three equal installments on October 14, 2026, October 14, 2027, and October 14, 2028, subject to continuous service.

What does each RSU represent for CIFR?

Each RSU represents a contingent right to receive one share of Cipher Mining common stock.

Do the reported RSUs have an expiration date?

No. The filing states the RSUs have no expiration date.

How many derivative securities are beneficially owned after the transaction?

The filing shows 375,000 derivative securities beneficially owned directly following the transaction.

Who is the reporting person in this CIFR Form 4?

The reporting person is Gregory Mumford, Chief Financial Officer of Cipher Mining.