Custom Index Systems’s Riot Platforms RIOT Stock Holding History

Custom Index Systems’s Portfolio RIOT Stock Details RIOT Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	–	Sell	-12,021	Closed	-$152K	–	290
2025 Q4	$152K	Buy	+12,021	New	+$206K	0.07%	236

Other funds holding RIOT

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Starboard Value New York $4.57B AUM 4.97% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Situational Awareness San Francisco, California $13.7B AUM 334.5% 1-Year Est. Return

Nomura Holdings Tokyo, Japan $37.7B AUM 34.44% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Jane Street New York $777B AUM 61.18% 1-Year Est. Return

Custom Index Systems's RIOT Position: Q1 2026 in Review

Custom Index Systems sold out of Riot Platforms (RIOT) in Q1 2026, closing a stake of 12,021 shares — an estimated $152K sold.

Custom Index Systems first reported a position in RIOT in Q4 2025 and held it in 1 quarter. The position peaked at $152K in Q4 2025. 402 funds tracked by Wall St. Rank hold RIOT as of Q1 2026.

Custom Index Systems reported no remaining Riot Platforms position as of Q1 2026 after selling out during the quarter.
Custom Index Systems sold 12,021 Riot Platforms shares in Q1 2026, an estimated $152K.
Custom Index Systems first reported a position in Riot Platforms in Q4 2025 and held it in 1 quarter.
Custom Index Systems's Riot Platforms position peaked at $152K in Q4 2025.
402 funds tracked by Wall St. Rank held Riot Platforms as of Q1 2026.

Based on Custom Index Systems's 13F filing for Q1 2026, filed 29 Apr 2026.