裡維安汽車公司
MX ˙ BMV ˙ US76954A1034
SecurityMX:RIVN / Rivian Automotive, Inc.
InstitutionFirst Pacific Financial
Latest Disclosed Ownership23,198 shares
Latest Disclosed Value $ 349,130
First Pacific Financial reports 2.18% increase in ownership of RIVN / Rivian Automotive, Inc.

On April 23, 2026 - First Pacific Financial filed a 13F-HR form disclosing ownership of 23,198 shares of Rivian Automotive, Inc. (MX:RIVN) valued at $349,130 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 16, 2026 disclosing 22,703 shares of Rivian Automotive, Inc.. This represents a change in shares of 2.18% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-23 2026-03-31 13F RIVIAN AUTOMOTIVE COM CL A 76954A103 23,198 495 2.18 349 -21.92 0.0450
2026-01-16 2025-12-31 13F RIVIAN AUTOMOTIVE COM CL A 76954A103 22,703 -1,175 -4.92 447 27.71 0.0584
2025-10-21 2025-09-30 13F RIVIAN AUTOMOTIVE COM CL A 76954A103 23,878 -378 -1.56 351 5.11 0.0487
2025-07-18 2025-06-30 13F RIVIAN AUTOMOTIVE COM CL A 76954A103 24,256 -4,292 -15.03 333 -6.20 0.0491
2025-04-23 2025-03-31 13F RIVIAN AUTOMOTIVE COM CL A 76954A103 28,548 -8,641 -23.24 355 -28.14 0.0721
2025-01-15 2024-12-31 13F RIVIAN AUTOMOTIVE COM CL A 76954A103 37,189 1,449 4.05 495 23.19 0.1151
2024-10-15 2024-09-30 13F RIVIAN AUTOMOTIVE COM CL A 76954A103 35,740 27,369 326.95 401 258.04 0.0938
2024-07-19 2024-06-30 13F RIVIAN AUTOMOTIVE COM CL A 76954A103 8,371 8,171 4,085.50 112 5,500.00 0.0289
2024-04-24 2024-03-31 13F RIVIAN AUTOMOTIVE COM CL A 76954A103 200 200 2 0.0006
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.