Twin Tree Management’s Rivian RIVN Stock Holding History

Twin Tree Management’s Portfolio RIVN Stock Details RIVN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$2.45M	Buy	141,057 +54,753	+63%	+$854K	0.05%	495
2026 Q1	$1.3M	Sell	86,304 -114,102	-57%	-$1.82M	0.03%	627
2025 Q4	$3.95M	Buy	200,406 +90,141	+82%	+$1.43M	0.03%	593
2025 Q3	$1.62M	Buy	110,265 +72,089	+189%	+$966K	0.01%	1096
2025 Q2	$525K	Sell	38,176 -861,198	-96%	-$11.7M	﹤0.01%	1437
2025 Q1	$11.2M	Buy	+899,374	New	+$11.3M	0.02%	626
2024 Q3	–	Sell	-439,579	Closed	-$6.32M	–	1732
2024 Q2	$5.9M	Buy	+439,579	New	+$4.59M	0.01%	721
2024 Q1	–	Sell	-309,338	Closed	-$4.46M	–	1560
2023 Q4	$7.26M	Buy	309,338 +142,665	+86%	+$2.68M	0.01%	779
2023 Q3	$4.05M	Buy	166,673 +99,939	+150%	+$2.33M	0.01%	732
2023 Q2	$1.11M	Buy	+66,734	New	+$932K	﹤0.01%	995

Other funds holding RIVN

ACI

Amazon.com Inc Seattle, Washington $4.42B AUM 22.6% 1-Year Est. Return

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

Baillie Gifford & Co Edinburgh, United Kingdom $110B AUM 4.8% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

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

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

SPC

Slate Path Capital New York $7.22B AUM 110.75% 1-Year Est. Return

D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return

Uber San Francisco, California $4.51B AUM 1.92% 1-Year Est. Return

Twin Tree Management's RIVN Position: Q2 2026 in Review

Twin Tree Management increased its Rivian (RIVN) stake by 63% in Q2 2026, buying an estimated $854K and bringing the position to 141,057 shares worth $2.45M. The position accounts for 0.05% of the portfolio, ranked #495.

Twin Tree Management first reported a position in RIVN in Q2 2023 and has held it in 10 quarters since. The position peaked at $11.2M in Q1 2025. 817 funds tracked by Wall St. Rank hold RIVN as of Q2 2026.

Twin Tree Management held 141,057 shares of Rivian worth $2.45M as of Q2 2026.
Twin Tree Management bought 54,753 Rivian shares in Q2 2026, an estimated $854K.
Rivian made up 0.05% of Twin Tree Management's portfolio in Q2 2026, its #495 holding.
Twin Tree Management first reported a position in Rivian in Q2 2023 and has held it in 10 quarters since.
Twin Tree Management's Rivian position peaked at $11.2M in Q1 2025.
817 funds tracked by Wall St. Rank held Rivian as of Q2 2026.

Based on Twin Tree Management's 13F filing for Q2 2026, filed 12 Aug 2026.