Gregory J.d. Mumford - 14 Oct 2026 Form 4 Insider Report for Cipher Digital Inc. (CIFR)

Reporting relationship: Chief Financial Officer
Issuer ticker: CIFR
Reported as of: 14 Oct 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 15 Oct 2026, 19:28:53 UTC
Prior SEC filing: 08 Oct 2026
Source filing: View source filing
Reporting owner signature: /s/ William Iwaschuk, Attorney-in-Fact for Gregory Mumford

Filing notes and source

Key filing fact

Gregory J.d. Mumford filed Form 4 for Cipher Digital Inc. (CIFR) on 15 Oct 2026.

Key facts

This page summarizes Gregory J.d. Mumford's Form 4 filing for Cipher Digital Inc. (CIFR).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 15 Oct 2026, 19:28.

Change

Previous filing in this sequence was filed on 08 Oct 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002090886 Primary reporting owner

Mumford Gregory J.D.

Relationship: Chief Financial Officer
Address: C/O CIPHER DIGITAL INC., 1 VANDERBILT AVENUE, FLOOR 54, NEW YORK
Signature: /s/ William Iwaschuk, Attorney-in-Fact for Gregory Mumford
Signature date: 15 Oct 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CIFR transaction

Common Stock

Options Exercise

Transaction value
Shares: +125,000
Change %: +411%
Price
Shares after: 155,421
Date: 14 Oct 2026
Ownership: Direct
Footnotes: F1

CIFR transaction

Common Stock

Tax liability

Transaction value
Shares: -67,768
Change %: -44%
Price: $9.94^*
Shares after: 87,653
Date: 14 Oct 2026
Ownership: Direct

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

CIFR transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -125,000
Change %: -24%
Price: $0.000000^*
Shares after: 403,981
Date: 14 Oct 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 125,000
Exercise price
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Footnote F2

The RSUs 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.