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person · Reporting owner

Mumford Gregory J.D.

Disclosed activity across 1 company

Tapewire entity
33347
SEC CIK
0002090886

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Cipher Digital Inc.CIFR · Entity 3786Chief Financial OfficerOctober 14, 2026October 15, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Cipher Digital Inc.

Report date October 14, 2026 · Filed October 15, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect87,653 Ending reported balance After 2026-10-14 transaction · row 2
2 source rows · reconciled sequence

Row 1 · 2026-10-14 · Exercise / conversion · Acquired 125,000 · Balance 155,421

F1: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Row 2 · 2026-10-14 · Tax withholding · Disposed 67,768 · Balance 87,653

Restricted Stock UnitsSEC Table II · derivative / convertible securityDirect403,981 Reported balance After 2026-10-14 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2026-10-14 · Exercise / conversion · Disposed 125,000 · Balance 403,981

F1: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

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.

Filing footnotes · ownership attribution and instrument terms

F1: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

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.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
October 14, 2026 Filed Oct 15, 2026 23:28 UTC Cipher Digital Inc. CIFR · Entity 3786 Exercise / conversionRestricted Stock Units · Derivative 125,000 $0.00 $0.00
Disclosure

SEC source: 0002090886-26-000012 · wk-form4_1792106929.xml · derivative · entry 3

Mumford Gregory J.D. · CIK 0002090886 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 403,981

Underlying: Common Stock · 125,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

F2 · derivative.exercise_date: 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.

F2 · derivative.expiration_date: 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.

Read SEC document
October 14, 2026 Filed Oct 15, 2026 23:28 UTC Cipher Digital Inc. CIFR · Entity 3786 Tax withholdingCommon Stock 67,768 $9.94 $673,613.92
Disclosure

SEC source: 0002090886-26-000012 · wk-form4_1792106929.xml · nonDerivative · entry 2

Mumford Gregory J.D. · CIK 0002090886 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 87,653

Read SEC document
October 14, 2026 Filed Oct 15, 2026 23:28 UTC Cipher Digital Inc. CIFR · Entity 3786 Exercise / conversionCommon Stock 125,000 Not disclosed Not disclosed
Disclosure

SEC source: 0002090886-26-000012 · wk-form4_1792106929.xml · nonDerivative · entry 1

Mumford Gregory J.D. · CIK 0002090886 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 155,421

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Read SEC document
September 30, 2026 Filed Oct 8, 2026 22:56 UTC Amendment Cipher Digital Inc. CIFR · Entity 3786 Exercise / conversionRestricted Stock Units · Derivative 17,109 $0.00 $0.00
Disclosure

SEC source: 0002090886-26-000010 · wk-form4a_1791500212.xml · derivative · entry 3

Mumford Gregory J.D. · CIK 0002090886 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 528,981

Underlying: Common Stock · 17,109 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

F2 · derivative.exercise_date: The RSUs vest in equal quarterly installments over a three-year period, on March 31, June 30, September 30 and December 15 of each year, subject to the Reporting Person's continuous service on the applicable vesting date. The first vesting date occurred on March 31, 2026.

F2 · derivative.expiration_date: The RSUs vest in equal quarterly installments over a three-year period, on March 31, June 30, September 30 and December 15 of each year, subject to the Reporting Person's continuous service on the applicable vesting date. The first vesting date occurred on March 31, 2026.

Read SEC document
September 30, 2026 Filed Oct 8, 2026 22:56 UTC Amendment Cipher Digital Inc. CIFR · Entity 3786 Tax withholdingCommon Stock 6,895 $15.83 $109,147.85
Disclosure

SEC source: 0002090886-26-000010 · wk-form4a_1791500212.xml · nonDerivative · entry 2

Mumford Gregory J.D. · CIK 0002090886 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,421

Read SEC document
September 30, 2026 Filed Oct 8, 2026 22:56 UTC Amendment Cipher Digital Inc. CIFR · Entity 3786 Exercise / conversionCommon Stock 17,109 Not disclosed Not disclosed
Disclosure

SEC source: 0002090886-26-000010 · wk-form4a_1791500212.xml · nonDerivative · entry 1

Mumford Gregory J.D. · CIK 0002090886 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,316

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Read SEC document
September 30, 2026 Filed Oct 2, 2026 22:35 UTC Cipher Digital Inc. CIFR · Entity 3786 Exercise / conversionRestricted Stock Units · Derivative 17,109 $0.00 $0.00
Disclosure

SEC source: 0002090886-26-000008 · wk-form4_1790980518.xml · derivative · entry 2

Mumford Gregory J.D. · CIK 0002090886 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 528,981

Underlying: Common Stock · 17,109 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

F2 · derivative.exercise_date: The RSUs vest in equal quarterly installments over a three-year period, on March 31, June 30, September 30 and December 15 of each year, subject to the Reporting Person's continuous service on the applicable vesting date. The first vesting date occurred on March 31, 2026.

F2 · derivative.expiration_date: The RSUs vest in equal quarterly installments over a three-year period, on March 31, June 30, September 30 and December 15 of each year, subject to the Reporting Person's continuous service on the applicable vesting date. The first vesting date occurred on March 31, 2026.

Read SEC document
September 30, 2026 Filed Oct 2, 2026 22:35 UTC Cipher Digital Inc. CIFR · Entity 3786 Exercise / conversionCommon Stock 17,109 Not disclosed Not disclosed
Disclosure

SEC source: 0002090886-26-000008 · wk-form4_1790980518.xml · nonDerivative · entry 1

Mumford Gregory J.D. · CIK 0002090886 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,316

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Read SEC document
June 30, 2026 Filed Jul 2, 2026 20:40 UTC Cipher Digital Inc. CIFR · Entity 3786 Exercise / conversionRestricted Stock Units · Derivative 17,108 $0.00 $0.00
Disclosure

SEC source: 0002090886-26-000006 · wk-form4_1783024856.xml · derivative · entry 3

Mumford Gregory J.D. · CIK 0002090886 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 546,090

Underlying: Common Stock · 17,108 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

F2 · derivative.exercise_date: The RSUs vest in equal quarterly installments over a three-year period, on March 31, June 30, September 30 and December 15 of each year, subject to the Reporting Person's continuous service on the applicable vesting date. The first vesting date occurred on March 31, 2026.

F2 · derivative.expiration_date: The RSUs vest in equal quarterly installments over a three-year period, on March 31, June 30, September 30 and December 15 of each year, subject to the Reporting Person's continuous service on the applicable vesting date. The first vesting date occurred on March 31, 2026.

Read SEC document
June 30, 2026 Filed Jul 2, 2026 20:40 UTC Cipher Digital Inc. CIFR · Entity 3786 Tax withholdingCommon Stock 6,895 $24.50 $168,927.50
Disclosure

SEC source: 0002090886-26-000006 · wk-form4_1783024856.xml · nonDerivative · entry 2

Mumford Gregory J.D. · CIK 0002090886 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,207

Read SEC document
June 30, 2026 Filed Jul 2, 2026 20:40 UTC Cipher Digital Inc. CIFR · Entity 3786 Exercise / conversionCommon Stock 17,108 Not disclosed Not disclosed
Disclosure

SEC source: 0002090886-26-000006 · wk-form4_1783024856.xml · nonDerivative · entry 1

Mumford Gregory J.D. · CIK 0002090886 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,102

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Read SEC document
March 31, 2026 Filed Apr 7, 2026 22:18 UTC Cipher Digital Inc. CIFR · Entity 3786 Exercise / conversionRestricted Stock Units · Derivative 17,108 $0.00 $0.00
Disclosure

SEC source: 0001819989-26-000012 · wk-form4_1775600329.xml · derivative · entry 3

Mumford Gregory J.D. · CIK 0002090886 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 563,198

Underlying: Common Stock · 17,108 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

F2 · derivative.exercise_date: The RSUs vest in equal quarterly installments over a three-year period, on March 31, June 30, September 30 and December 15 of each year, subject to the Reporting Person's continuous service on the applicable vesting date. The first vesting date occurred on March 31, 2026.

F2 · derivative.expiration_date: The RSUs vest in equal quarterly installments over a three-year period, on March 31, June 30, September 30 and December 15 of each year, subject to the Reporting Person's continuous service on the applicable vesting date. The first vesting date occurred on March 31, 2026.

Read SEC document
March 31, 2026 Filed Apr 7, 2026 22:18 UTC Cipher Digital Inc. CIFR · Entity 3786 Tax withholdingCommon Stock 7,114 $12.87 $91,557.18
Disclosure

SEC source: 0001819989-26-000012 · wk-form4_1775600329.xml · nonDerivative · entry 2

Mumford Gregory J.D. · CIK 0002090886 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,994

Read SEC document
March 31, 2026 Filed Apr 7, 2026 22:18 UTC Cipher Digital Inc. CIFR · Entity 3786 Exercise / conversionCommon Stock 17,108 Not disclosed Not disclosed
Disclosure

SEC source: 0001819989-26-000012 · wk-form4_1775600329.xml · nonDerivative · entry 1

Mumford Gregory J.D. · CIK 0002090886 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,108

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Read SEC document
February 25, 2026 Filed Feb 27, 2026 22:23 UTC Cipher Digital Inc. CIFR · Entity 3786 GrantRestricted Stock Units · Derivative 205,306 $0.00 $0.00
Disclosure

SEC source: 0002090886-26-000002 · wk-form4_1772231033.xml · derivative · entry 1

Mumford Gregory J.D. · CIK 0002090886 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 580,306

Underlying: Common Stock · 205,306 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

F2 · derivative.exercise_date: The RSUs vest in equal quarterly installments over a three-year period, on March 31, June 30, September 30 and December 15 of each year, with the first vesting date occurring on March 31, 2026, subject to the Reporting Person's continuous service on the applicable vesting date.

F2 · derivative.expiration_date: The RSUs vest in equal quarterly installments over a three-year period, on March 31, June 30, September 30 and December 15 of each year, with the first vesting date occurring on March 31, 2026, subject to the Reporting Person's continuous service on the applicable vesting date.

Read SEC document
October 14, 2025 Filed Oct 16, 2025 22:53 UTC Cipher Digital Inc. CIFR · Entity 3786 GrantRestricted Stock Units · Derivative 375,000 $0.00 $0.00
Disclosure

SEC source: 0002090886-25-000003 · wk-form4_1760655177.xml · derivative · entry 1

Mumford Gregory J.D. · CIK 0002090886 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 375,000

Underlying: Common Stock · 375,000 shares

Expires not disclosed

F1 · derivative.exercise_price: 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.

F2 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.