Tesla, Inc.
CH ˙ SWX ˙ US88160R1014
SecurityCH:TSLA / Tesla, Inc.
InstitutionCastleark Management Llc
Latest Disclosed Ownership39,180 shares
Latest Disclosed Value $ 14,565,165
Castleark Management Llc reports 39.43% increase in ownership of TSLA / Tesla, Inc.

On May 15, 2026 - Castleark Management Llc filed a 13F-HR form disclosing ownership of 39,180 shares of Tesla, Inc. (CH:TSLA) valued at $14,565,165 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 28,100 shares of Tesla, Inc.. This represents a change in shares of 39.43% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-15 2026-03-31 13F TESLA COM 88160R101 39,180 11,080 39.43 14,565 15.26 0.4819
2026-02-12 2025-12-31 13F TESLA COM 88160R101 28,100 25,300 903.57 12,637 915.02 0.3710
2025-11-17 2025-09-30 13F TESLA COM 88160R101 2,800 0 0.00 1,245 40.04 0.0349
2025-08-18 2025-06-30 13F TESLA COM 88160R101 2,800 0 0.00 889 22.62 0.0267
2025-05-15 2025-03-31 13F TESLA COM 88160R101 2,800 0 0.00 726 -35.84 0.0251
2025-02-18 2024-12-31 13F TESLA COM 88160R101 2,800 0 0.00 1,131 54.37 0.0394
2024-11-15 2024-09-30 13F TESLA COM 88160R101 2,800 0 0.00 733 32.13 0.0299
2024-08-14 2024-06-30 13F TESLA COM 88160R101 2,800 0 0.00 554 12.60 0.0226
2024-05-16 2024-03-31 13F TESLA COM 88160R101 2,800 0 0.00 492 -29.21 0.0205
2024-02-15 2023-12-31 13F TESLA COM 88160R101 2,800 0 0.00 696 -0.71 0.0308
2023-11-15 2023-09-30 13F TESLA COM 88160R101 2,800 0 0.00 701 -4.37 0.0357
2023-08-16 2023-06-30 13F TESLA COM 88160R101 2,800 -151,834 -98.19 733 -97.72 0.0332
2023-05-16 2023-03-31 13F TESLA COM 88160R101 154,634 -2,280 -1.45 32,080 65.98 1.5759
2023-02-10 2022-12-31 13F TESLA COM 88160R101 156,914 2,800 1.82 19,329 -52.72 1.0096
2022-11-15 2022-09-30 13F TESLA COM 88160R101 154,114 107,756 232.44 40,879 30.95 2.2748
2022-08-16 2022-06-30 13F TESLA COM 88160R101 46,358 -1,560 -3.26 31,218 -39.54 1.6707
2022-05-16 2022-03-31 13F TESLA COM 88160R101 47,918 -5,080 -9.59 51,636 -7.80 2.2283
2022-02-16 2021-12-31 13F TESLA COM 88160R101 52,998 5,800 12.29 56,007 53.02 2.0590
2021-11-12 2021-09-30 13F TESLA COM 88160R101 47,198 -5,050 -9.67 36,601 3.06 1.3995
2021-08-17 2021-06-30 13F TESLA COM 88160R101 52,248 -1,780 -3.29 35,513 -1.59 1.1929
2021-05-14 2021-03-31 13F TESLA COM 88160R101 54,028 3,360 6.63 36,087 0.93 1.2994
2021-02-17 2020-12-31 13F TESLA COM 88160R101 50,668 3,208 6.76 35,755 75.61 1.3384
2020-11-16 2020-09-30 13F TESLA COM 88160R101 47,460 40,512 583.07 20,361 171.37 0.7979
2020-08-14 2020-06-30 13F TESLA COM 88160R101 6,948 -36,795 -84.12 7,503 -67.27 0.3263
2020-05-13 2020-03-31 13F TESLA COM 88160R101 43,743 -16,092 -26.89 22,921 -8.43 1.3572
2020-02-14 2019-12-31 13F TESLA COM 88160R101 59,835 44,060 279.30 25,031 558.71 1.0017
2019-11-15 2019-09-30 13F TESLA COM 88160R101 15,775 -1,038 -6.17 3,800 1.14 0.1550
2019-08-13 2019-06-30 13F TESLA COM 88160R101 16,813 -25,321 -60.10 3,757 -68.14 0.1441
2019-05-14 2019-03-31 13F TESLA COM 88160R101 42,134 -3,080 -6.81 11,792 -21.63 0.4439
2019-02-12 2018-12-31 13F TESLA COM 88160R101 45,214 -3,840 -7.83 15,047 15.85 0.6412
2018-11-14 2018-09-30 13F TESLA COM 88160R101 49,054 -500 -1.01 12,988 -23.58 0.3732
2018-08-15 2018-06-30 13F TESLA COM 88160R101 49,554 -710 -1.41 16,995 27.05 0.5231
2018-05-14 2018-03-31 13F TESLA COM 88160R101 50,264 11,677 30.26 13,377 11.35 0.4236
2018-02-15 2017-12-31 13F TESLA COM 88160R101 38,587 -5,385 -12.25 12,014 -19.90 0.3607
2017-11-15 2017-09-30 13F TESLA COM 88160R101 43,972 37,122 541.93 14,999 505.53 0.4708
2017-08-15 2017-06-30 13F TESLA COM 88160R101 6,850 6,850 2,477 0.0810
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.