CSS LLC’s Rivian RIVN Stock Holding History

CSS LLC’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 Q1	–	Sell	-4,500	Closed	-$88.7K	–	1153
2025 Q4	$88.7K	Hold	4,500	–	–	﹤0.01%	859
2025 Q3	$66.1K	Sell	4,500 -21,000	-82%	-$281K	﹤0.01%	881
2025 Q2	$350K	Buy	25,500 +21,000	+467%	+$285K	0.02%	648
2025 Q1	$56K	Hold	4,500	–	–	﹤0.01%	830
2024 Q4	$59.9K	Sell	4,500 -23,200	-84%	-$267K	﹤0.01%	887
2024 Q3	$311K	Buy	+27,700	New	+$398K	0.01%	597
2023 Q3	–	Sell	-5,000	Closed	-$83.3K	–	913
2023 Q2	$83.3K	Buy	+5,000	New	+$69.9K	0.01%	752
2023 Q1	–	Sell	-18,200	Closed	-$335K	–	868
2022 Q4	$335K	Buy	18,200 +8,200	+82%	+$241K	0.02%	490
2022 Q3	$329K	Buy	+10,000	New	+$341K	0.02%	639

Other funds holding RIVN

ACI

Amazon.com Inc Seattle, Washington $2.63B AUM 20.53% 1-Year Est. Return

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

Baillie Gifford & Co Edinburgh, United Kingdom $97.9B AUM 20.73% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

JP Morgan Chase New York $1.56T AUM 27.86% 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

UBS AM Chicago, Illinois $481B AUM 26.39% 1-Year Est. Return

Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return

CSS LLC's RIVN Position: Q1 2026 in Review

CSS LLC opened a new position in Rivian (RIVN) in Q1 2026: 1,000 shares worth $15.1K. The stake represents ﹤0.01% of the portfolio and ranks #922 among its holdings. This is a return to the name: CSS LLC previously reported a position in RIVN as recently as Q1 2025.

CSS LLC first reported a position in RIVN in Q3 2023 and has held it in 7 quarters since. The position peaked at $1.71M in Q3 2023. 806 funds tracked by Wall St. Rank hold RIVN as of Q1 2026.

CSS LLC held 1,000 shares of Rivian worth $15.1K as of Q1 2026.
Rivian was a new CSS LLC position in Q1 2026.
Rivian made up ﹤0.01% of CSS LLC's portfolio in Q1 2026, its #922 holding.
CSS LLC first reported a position in Rivian in Q3 2023 and has held it in 7 quarters since.
CSS LLC's Rivian position peaked at $1.71M in Q3 2023.
806 funds tracked by Wall St. Rank held Rivian as of Q1 2026.

Based on CSS LLC's 13F filing for Q1 2026, filed 15 May 2026.