Tesla, Inc.
CH ˙ SWX ˙ US88160R1014
SecurityCH:TSLA / Tesla, Inc.
InstitutionMain Street Research LLC
Latest Disclosed Ownership12,337 shares
Latest Disclosed Value $ 4,586,457
Main Street Research LLC reports 3.22% decrease in ownership of TSLA / Tesla, Inc.

On April 30, 2026 - Main Street Research LLC filed a 13F-HR form disclosing ownership of 12,337 shares of Tesla, Inc. (CH:TSLA) valued at $4,586,457 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 12,748 shares of Tesla, Inc.. This represents a change in shares of -3.22% 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)
2026-04-30 2026-03-31 13F TESLA COM 88160R101 12,337 -411 -3.22 4,586 -20.01 0.2669
2026-02-09 2025-12-31 13F TESLA COM 88160R101 12,748 -272 -2.09 5,733 -0.98 0.3280
2025-11-13 2025-09-30 13F TESLA COM 88160R101 13,020 1,220 10.34 5,790 54.48 0.3129
2025-08-05 2025-06-30 13F TESLA COM 88160R101 11,800 -3,245 -21.57 3,749 -3.87 0.2333
2025-04-30 2025-03-31 13F TESLA COM 88160R101 15,045 -923 -5.78 3,899 -39.53 0.2548
2025-02-07 2024-12-31 13F TESLA COM 88160R101 15,968 2,062 14.83 6,449 77.24 0.4018
2024-11-12 2024-09-30 13F TESLA COM 88160R101 13,906 -2 -0.01 3,638 32.19 0.2289
2024-07-29 2024-06-30 13F TESLA COM 88160R101 13,908 190 1.39 2,752 14.14 0.1815
2024-05-01 2024-03-31 13F TESLA COM 88160R101 13,718 -480 -3.38 2,411 -31.64 0.1639
2024-01-30 2023-12-31 13F TESLA COM 88160R101 14,198 1,394 10.89 3,528 10.12 0.2833
2023-11-03 2023-09-30 13F TESLA COM 88160R101 12,804 64 0.50 3,204 -3.93 0.3301
2023-08-08 2023-06-30 13F TESLA COM 88160R101 12,740 -783 -5.79 3,335 18.86 0.5315
2023-05-01 2023-03-31 13F TESLA COM 88160R101 13,523 -917 -6.35 2,805 57.76 0.5540
2023-02-06 2022-12-31 13F TESLA COM 88160R101 14,440 -1,457 -9.17 1,779 -57.84 0.4331
2022-11-14 2022-09-30 13F TESLA COM 88160R101 15,897 11,315 246.94 4,217 36.65 0.9288
2022-08-12 2022-06-30 13F TESLA COM 88160R101 4,582 52 1.15 3,086 -36.79 0.8091
2022-05-05 2022-03-31 13F TESLA COM 88160R101 4,530 -381 -7.76 4,882 -5.93 0.4588
2022-02-09 2021-12-31 13F TESLA COM 88160R101 4,911 166 3.50 5,190 41.03 0.4007
2021-11-12 2021-09-30 13F TESLA COM 88160R101 4,745 1,556 48.79 3,680 69.74 0.3220
2021-08-06 2021-06-30 13F Tesla Motors COM 88160R101 3,189 168 5.56 2,168 7.43 0.1740
2021-05-07 2021-03-31 13F Tesla Motors COM 88160R101 3,021 120 4.14 2,018 -1.42 0.1898
2021-02-12 2020-12-31 13F Tesla Motors COM 88160R101 2,901 46 1.61 2,047 67.10 0.2202
2020-11-10 2020-09-30 13F Tesla Motors COM 88160R101 2,855 2,318 431.66 1,225 111.21 0.1560
2020-07-29 2020-06-30 13F Tesla Motors COM 88160R101 537 8 1.51 580 109.39 0.0910
2020-05-01 2020-03-31 13F Tesla Motors COM 88160R101 529 -31 -5.54 277 18.38 0.0679
2020-01-28 2019-12-31 13F Tesla Motors COM 88160R101 560 560 234 0.0369
2018-11-05 2018-09-30 13F Tesla Motors COM 88160R101 0 -645 -100.00 0 -100.00
2018-07-25 2018-06-30 13F Tesla Motors COM 88160R101 645 -800 -55.36 221 -42.60 0.0346
2018-05-08 2018-03-31 13F/A-1 Tesla Motors COM 88160R101 1,445 -245 -14.50 385 -26.81 0.0609
2018-05-08 2018-03-31 13F Tesla Motors COM 88160R101 1,690 0 526
2018-02-05 2017-12-31 13F Tesla Motors COM 88160R101 1,690 -25 -1.46 526 -10.09 0.0801
2017-10-16 2017-09-30 13F Tesla Motors COM 88160R101 1,715 50 3.00 585 -2.82 0.0944
2017-07-18 2017-06-30 13F Tesla Motors COM 88160R101 1,665 1,665 602 0.0983
2016-05-13 2016-03-31 13F Tesla Motors COM 88160R101 0 -14,232 -100.00 0 -100.00
2016-02-04 2015-12-31 13F Tesla Motors COM 88160R101 14,232 293 2.10 3,416 18.45 0.7299
2015-11-12 2015-09-30 13F Tesla Motors COM 88160R101 13,939 3,709 36.26 2,884 5.10 0.6766
2015-07-23 2015-06-30 13F Tesla Motors COM 88160R101 10,230 10,230 2,744 0.5620
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.