William Iwaschuk
William Iwaschuk: Co-President and CLO at Cipher Mining. What William Iwaschuk holds in an AI or semiconductor company tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.
Cipher Mining (CIFR)
William Iwaschuk holds 1.7M Cipher Mining shares (0.42% of the company), worth about $26.5M at the last price, according to the Form 4 of Sep 30, 2026.
- Shares held: 1.7M (0.42%), $26.5M — Held in their own name.
- Share units: 1.3M (0.31%), $19.6M — Cipher Mining promised them as pay: each unit becomes a share when it vests, if its conditions are met. No vote until then.
Declarations
- Cipher Mining (CIFR) — Form 4 of Sep 30, 2026 (Co-President and CLO): option exercise or conversion of 33,967; option exercise or conversion of 29,611; 1.7M shares after 0001887627-26-000010
- Cipher Mining (CIFR) — Form 4 of Jun 30, 2026 (Co-President and CLO): option exercise or conversion of 33,967; shares withheld for tax of 18,784 at $24.50; 1.6M shares after 0001887627-26-000008
- Cipher Mining (CIFR) — Form 4 of Jun 16, 2026 (Co-President and CLO): option exercise or conversion of 166,667; shares withheld for tax of 92,167 at $26.03; 1.5M shares after 0001887627-26-000006
- Cipher Mining (CIFR) — Form 4 of Mar 31, 2026 (Co-President and CLO): option exercise or conversion of 33,968; shares withheld for tax of 13,825 at $12.87; 1.5M shares after 0001887627-26-000004
- Cipher Mining (CIFR) — Form 4 of Feb 25, 2026 (Co-President and CLO) 0001887627-26-000002
- Cipher Mining (CIFR) — Form 4 of Dec 19, 2025 (Co-President and CLO): option exercise or conversion of 305,707; shares withheld for tax of 169,056 at $16.21; 1.4M shares after 0001887627-25-000011
- Cipher Mining (CIFR) — Form 4 of Dec 15, 2025 (Co-President and CLO): option exercise or conversion of 470,219; shares withheld for tax of 260,032 at $14.74; 1.3M shares after 0001887627-25-000009
- Cipher Mining (CIFR) — Form 4 of Nov 4, 2025 (Co-President and CLO): open-market sale of 173,094 at $22.52; 1.1M shares after 0001887627-25-000007
- Cipher Mining (CIFR) — Form 4 of Sep 30, 2025 (Co-President and CLO): option exercise or conversion of 366,667; shares withheld for tax of 202,767 at $12.59; 1.2M shares after 0001887627-25-000005
- Cipher Mining (CIFR) — Form 4 of Jun 30, 2025 (Co-President and CLO): option exercise or conversion of 33,968; shares withheld for tax of 18,785 at $4.78; 1.0M shares after 0001819989-25-000064
- Cipher Mining (CIFR) — Form 4 of Jun 16, 2025 (Co-President and CLO): option exercise or conversion of 166,667; shares withheld for tax of 87,039 at $3.93; 1.0M shares after 0001819989-25-000060
- Cipher Mining (CIFR) — Form 4 of Mar 31, 2025 (Co-President and CLO): option exercise or conversion of 33,968; shares withheld for tax of 13,690 at $2.30; 953,688 shares after 0001819989-25-000017
- Cipher Mining (CIFR) — Form 4 of Feb 26, 2025 (Co-President and CLO) 0001819989-25-000013
- Cipher Mining (CIFR) — Form 4 of Dec 18, 2024 (Co-President and CLO): option exercise or conversion of 234,174; shares withheld for tax of 129,499 at $6.29; 933,410 shares after 0001819989-24-000038
- Cipher Mining (CIFR) — Form 4 of Nov 6, 2024 (Co-President and CLO): open-market sale of 600 at $7.00; 618,548 shares after 0001819989-24-000030
Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.