Stephen Mitchell Howell Jr.

Companies

• Riot Platforms, Inc.Chief operating officer Jun 11, 2024 to now¹

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• Riot Platforms, Inc. RIOT1,834,408 shares²$25.8M at $14.06Aug 12, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Aug 12, 2026Gift 21,198 shares of Riot Platforms, Inc.²
• Jul 31, 2026Shares withheld for tax 153,162 shares at $20.17 of Riot Platforms, Inc.³
• Jul 1, 2026Shares withheld for tax 21,966 shares at $23.96 of Riot Platforms, Inc.⁴
• Jan 1, 2026Granted 394,632 shares of Riot Platforms, Inc.⁵
• Jan 1, 2026Granted 197,316 shares of Riot Platforms, Inc.⁵
• Jan 1, 2026Shares withheld for tax 29,482 shares at $12.67 of Riot Platforms, Inc.⁵
• Jul 1, 2025Granted 443,656 shares of Riot Platforms, Inc.⁶
• Jul 1, 2025Granted 221,827 shares of Riot Platforms, Inc.⁶
• Jul 1, 2025Shares withheld for tax 20,345 shares at $11.27 of Riot Platforms, Inc.⁶
• Jul 1, 2025Shares withheld for tax 20,345 shares at $11.27 of Riot Platforms, Inc.⁷
• Jul 1, 2024Granted 251,256 shares of Riot Platforms, Inc.⁸
• Jul 1, 2024Granted 125,628 shares of Riot Platforms, Inc.⁸
• Jul 1, 2024Shares withheld for tax 3,188 shares at $9.95 of Riot Platforms, Inc.⁸