Stephen Mitchell Howell Jr. - 31 Jul 2026 Form 4 Insider Report for Riot Platforms, Inc. (RIOT)

Reporting relationship: COO
Issuer ticker: RIOT
Reported as of: 31 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 04 Aug 2026, 20:00:18 UTC
Prior SEC filing: 06 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Tanya McGill, Attorney-in-Fact for Stephen Howell

Key filing fact

Stephen Mitchell Howell Jr. filed Form 4 for Riot Platforms, Inc. (RIOT) on 04 Aug 2026.

Key facts

This page summarizes Stephen Mitchell Howell Jr.'s Form 4 filing for Riot Platforms, Inc. (RIOT).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 04 Aug 2026, 20:00.

Change

Previous filing in this sequence was filed on 06 Jul 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 0002025334 Primary reporting owner

Howell Stephen Mitchell Jr.

Relationship: COO
Address: C/O RIOT PLATFORMS, INC., 85 RIO GRANDE DRIVE, SUITE 200, CASTLE ROCK
Signature: /s/ Tanya McGill, Attorney-in-Fact for Stephen Howell
Signature date: 04 Aug 2026

Reported non-derivative transactions

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

RIOT transaction

Common Stock

Tax liability

Transaction value
Shares: -153,162
Change %: -7.6%
Price: $20.17^*
Shares after: 1,855,606
Date: 31 Jul 2026
Ownership: Direct
Footnotes: F1

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of performance-based restricted stock previously granted to the Reporting Person under the Issuer's Long-Term Incentive Program. The vesting of such shares was subject to the Issuer's achievement of certain performance objectives.