Mainstream Capital Management LLC

Position in RIOT — Riot Platforms, Inc.

CIK 2043084 LOS ANGELES, CA

Position in RIOT

as of Jun 30, 2026 · filed Jul 15, 2026 Compact

Position Value

$456,315

+$250,324 QoQ

Shares Held

16,666

0.0% QoQ

Ownership

0.004%

of shares outstanding

% of Portfolio

0.48%

of 13F equity value

Holder Rank

#247

of 448 holders

Holding Since

Mar 2025

6 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Financial Services · as of Jun 30, 2026

Mainstream Capital Management LLC holds $5,755,069 across 4 Capital Markets names. RIOT ranks #4 (7.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	GS	Goldman Sachs Group Inc	1,890	$1,911,489
2	IBKR	Interactive Brokers Group, Inc.	21,923	$1,908,177
3	SCHW	Schwab Charles Corp	16,030	$1,479,088
4	RIOT	Riot Platforms, Inc. This page	16,666	$456,315

6 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$456,315	16,666	0.0%	Shares	Sole	2026-07-15
2026-03-31	$205,991	16,666	0.0%	Shares	Sole	2026-04-17
2025-12-31	$211,158	16,666	-10.1%	Shares	Sole	2026-01-21
2025-09-30	$352,663	18,532	0.0%	Shares	Sole	2025-10-20
2025-06-30	$209,411	18,532	0.0%	Shares	Sole	2025-07-15
2025-03-31	$131,947	18,532	—	Shares	Sole	2025-04-28
No filing history on record for this holder in this stock.