LMR Partners’s Rivian RIVN Stock Holding History

LMR Partners’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	$246M	Buy	16,355,000 +4,755,600	+41%	+$76M	0.54%	14
2025 Q4	$229M	Buy	11,599,400 +355,100	+3%	+$5.64M	0.43%	15
2025 Q3	$165M	Buy	11,244,300 +3,666,000	+48%	+$49.1M	0.73%	19
2025 Q2	$104M	Buy	7,578,300 +1,594,600	+27%	+$21.6M	0.75%	19
2025 Q1	$74.5M	Buy	5,983,700 +486,300	+9%	+$6.12M	0.7%	18
2024 Q4	$73.1M	Hold	5,497,400	–	–	0.61%	23
2024 Q3	$61.7M	Buy	5,497,400 +1,000,000	+22%	+$14.4M	0.49%	31
2024 Q2	$60.4M	Buy	4,497,400 +450,000	+11%	+$4.7M	0.51%	31
2024 Q1	$44.3M	Hold	4,047,400	–	–	0.45%	46
2023 Q4	$95M	Buy	4,047,400 +1,500,000	+59%	+$28.2M	1.08%	12
2023 Q3	$61.9M	Hold	2,547,400	–	–	0.7%	24
2023 Q2	$42.4M	Hold	2,547,400	–	–	0.47%	44
2023 Q1	$39.4M	Buy	+2,547,400	New	+$43M	0.61%	34

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

LMR Partners's RIVN Position: Q1 2026 in Review

LMR Partners reduced its Rivian (RIVN) stake by 22% in Q1 2026, selling an estimated $252K and leaving 57,310 shares worth $863K. The position accounts for ﹤0.01% of the portfolio, ranked #1008.

LMR Partners first reported a position in RIVN in Q3 2025 and has held it in 3 quarters since. The position peaked at $1.85M in Q3 2025. 805 funds tracked by Wall St. Rank hold RIVN as of Q1 2026.

LMR Partners held 57,310 shares of Rivian worth $863K as of Q1 2026.
LMR Partners sold 15,747 Rivian shares in Q1 2026, an estimated $252K.
Rivian made up ﹤0.01% of LMR Partners's portfolio in Q1 2026, its #1008 holding.
LMR Partners first reported a position in Rivian in Q3 2025 and has held it in 3 quarters since.
LMR Partners's Rivian position peaked at $1.85M in Q3 2025.
805 funds tracked by Wall St. Rank held Rivian as of Q1 2026.

Based on LMR Partners's 13F filing for Q1 2026, filed 15 May 2026.