[Form 4/A] Riot Platforms, Inc. Amended Insider Trading Activity

Rhea-AI Filing Summary

Reporting person: Lance Varro D'Ambrosio, a director of Riot Platforms, Inc. (RIOT), amended a prior filing to add a Power of Attorney and to disclose a restricted stock award. On 07/11/2025 he was granted 16,103 restricted shares at a $0 purchase price, increasing his beneficial ownership to 60,544 shares. The award vests in four approximately equal tranches (each ~25%) on 09/30/2025, 12/31/2025, 03/31/2026, and 06/30/2026, subject to continued board service through each vesting date. The amendment was filed to attach Exhibit 24 (Power of Attorney).

Positive

• 16,103 restricted shares granted to a director, aligning incentives with shareholders
• Total beneficial ownership increased to 60,544 shares following the grant
• Award vests in four scheduled tranches on 09/30/2025, 12/31/2025, 03/31/2026, and 06/30/2026

Negative

• None.

Insights

Corporate Governance Analyst

Director received time‑based restricted shares, aligning interests with shareholders.

The reporting shows a time‑based equity grant of 16,103 restricted shares exercisable at $0, which vests in four approximately equal tranches through 06/30/2026. This is a common retention mechanism for board members tying future compensation to continued service.

Key dependencies include continued board service to each vesting date and the absence of performance conditions; monitor the 09/30/2025 tranche timing and total post‑vest ownership of 60,544 shares for potential governance or dilution implications over the next 09/30/2025–06/30/2026.

Insider Transactions Specialist

Amendment mainly adds a Power of Attorney and clarifies the restricted share award details.

The filing amends a prior Form 4 to include Exhibit 24 and to record the grant date as 07/11/2025. The shares were reported as acquired with code V and a $0 price, consistent with a restricted stock award issued under the 2019 Equity Incentive Plan.

Because the shares are unvested until scheduled dates, they currently carry transfer restrictions; investors monitoring insider activity should note each vesting date (09/30/2025, 12/31/2025, 03/31/2026, 06/30/2026) for potential future open‑market sales or disclosures.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

D'Ambrosio Lance Varro

(Last) (First) (Middle)

C/O RIOT PLATFORMS, INC.

3855 AMBROSIA STREET, STE. 301

(Street)

CASTLE ROCK CO 80109

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Riot Platforms, Inc. [ RIOT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
07/11/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)
07/15/2025

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock(1)	07/11/2025		A		16,103(2)	A	$0	60,544	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. This Form 4 amendment is being filed solely to add the Power of Attorney, attached as Exhibit 24.

2. Represents an award of restricted shares of the Issuer's common stock, no par value per share, granted to the Reporting Person under the Issuer's 2019 Equity Incentive Plan, as amended, as of the indicated date, in connection with service on the Issuer's Board of Directors through June 30, 2026. These shares are eligible to vest, if at all, in four approximately equal tranches on September 30, 2025, December 31, 2025, March 31, 2026, and June 30, 2026, subject to the Reporting Person's continued service with the Issuer through the applicable vesting dates.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Tanya McGill, Attorney-in-Fact for Lance Varro D' Ambrosio	10/10/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did RIOT director Lance Varro D'Ambrosio disclose on Form 4/A?

He disclosed an amended Form 4 adding a Power of Attorney and a restricted stock award of 16,103 shares granted on 07/11/2025, raising his ownership to 60,544 shares.

When do the restricted shares vest for RIOT director D'Ambrosio?

The shares vest in four approximately equal tranches on 09/30/2025, 12/31/2025, 03/31/2026, and 06/30/2026, subject to continued service.

What price was paid for the restricted shares reported by RIOT insider?

The restricted shares were reported with a purchase price of $0, reflecting a grant rather than an open‑market purchase.

Why was this Form 4 amended?

The amendment was filed solely to add the Power of Attorney as Exhibit 24 to the original Form 4 filing.

How many shares does D'Ambrosio beneficially own after the grant?

He beneficially owns 60,544 shares following the reported restricted share award.