Starboard Value’s Riot Platforms RIOT Stock Holding History

Starboard Value’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 Q2	$1.92M	Buy	2,423,400 +1,630,900	+206%	+$36.8M	0.04%	21
2026 Q1	$705K	Buy	+792,500	New	+$12.2M	0.02%	25
2025 Q3	–	Sell	-187,600	Closed	-$101K	–	25
2025 Q2	$101K	Buy	+187,600	New	+$1.59M	﹤0.01%	25

Other funds holding RIOT

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Situational Awareness San Francisco, California $20.2B AUM 612.59% 1-Year Est. Return

Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

TCIM

TOMS Capital Investment Management New York $4.67B AUM 83.55% 1-Year Est. Return

Starboard Value's RIOT Position: Q2 2026 in Review

Starboard Value reduced its Riot Platforms (RIOT) stake by 35% in Q2 2026, selling an estimated $122M and leaving 10,114,576 shares worth $277M. The position accounts for 6.12% of the portfolio, ranked #8.

Starboard Value first reported a position in RIOT in Q4 2024 and has held it in 7 quarters since. 448 funds tracked by Wall St. Rank hold RIOT as of Q2 2026.

Starboard Value held 10,114,576 shares of Riot Platforms worth $277M as of Q2 2026.
Starboard Value sold 5,430,000 Riot Platforms shares in Q2 2026, an estimated $122M.
Riot Platforms made up 6.12% of Starboard Value's portfolio in Q2 2026, its #8 holding.
Starboard Value first reported a position in Riot Platforms in Q4 2024 and has held it in 7 quarters since.
448 funds tracked by Wall St. Rank held Riot Platforms as of Q2 2026.

Based on Starboard Value's 13F filing for Q2 2026, filed 14 Aug 2026.