Howell Stephen Mitchell Jr.
SEC insider (Form 3/4/5 filer). CIK 0002025334. COO at Riot Platforms, Inc. (RIOT). 9 reported Form 4/5 transactions since Sep 2024; latest on Aug 12, 2026. Located in CASTLE ROCK, CO.
Companies Howell Stephen Mitchell Jr. has filed insider reports for
- Riot Platforms, Inc. (RIOT): Officer, COO
Howell Stephen Mitchell Jr.
CIK: 0002025334
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Riot Platforms, Inc.
Discretionary Trading P&L
Holdings
Transaction History (9 total)
- Aug 12, 2026RIOT
Riot Platforms, Inc.
GiftDirect21.2K shares- - Jul 31, 2026RIOT
Riot Platforms, Inc.
Tax PaymentDirect153.2K shares at avg. $20.17$3.1M - Jul 1, 2026RIOT
Riot Platforms, Inc.
Tax PaymentDirect22K shares at avg. $23.96$526K - Jan 1, 2026RIOT
Riot Platforms, Inc.
Tax PaymentDirect29.5K shares at avg. $12.67$374K - Jan 1, 2026RIOT
Riot Platforms, Inc.
AwardDirect197.3K shares- - Jan 1, 2026RIOT
Riot Platforms, Inc.
AwardDirect394.6K shares- - Jul 1, 2025RIOT
Riot Platforms, Inc.
Tax PaymentDirect20.3K shares at avg. $11.27$229K - Jul 1, 2025RIOT
Riot Platforms, Inc.
AwardDirect443.7K shares- - Jul 1, 2025RIOT
Riot Platforms, Inc.
AwardDirect221.8K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Aug 12, 2026 | RIOT Riot Platforms, Inc. | Gift | 21,198 | - | $0 | Direct |
| Jul 31, 2026 | RIOT Riot Platforms, Inc. | Tax Payment | 153,162 | $20.17 | $3,089,278 | Direct |
| Jul 1, 2026 | RIOT Riot Platforms, Inc. | Tax Payment | 21,966 | $23.96 | $526,305 | Direct |
| Jan 1, 2026 | RIOT Riot Platforms, Inc. | Tax Payment | 29,482 | $12.67 | $373,537 | Direct |
| Jan 1, 2026 | RIOT Riot Platforms, Inc. | Award | 197,316 | - | $0 | Direct |
| Jan 1, 2026 | RIOT Riot Platforms, Inc. | Award | 394,632 | - | $0 | Direct |
| Jul 1, 2025 | RIOT Riot Platforms, Inc. | Tax Payment | 20,345 | $11.27 | $229,288 | Direct |
| Jul 1, 2025 | RIOT Riot Platforms, Inc. | Award | 443,656 | - | - | Direct |
| Jul 1, 2025 | RIOT Riot Platforms, Inc. | Award | 221,827 | - | - | Direct |
1-9 of 9 transactions