Tesla, Inc.
CH ˙ SWX ˙ US88160R1014
SecurityCH:TSLA / Tesla, Inc.
InstitutionFlagship Harbor Advisors, Llc
Latest Disclosed Ownership38,462 shares
Latest Disclosed Value $ 14,298,328
Flagship Harbor Advisors, Llc ownership in TSLA / Tesla, Inc.

On April 28, 2026 - Flagship Harbor Advisors, Llc filed a 13F-HR form disclosing ownership of 38,462 shares of Tesla, Inc. (CH:TSLA) valued at $14,298,328 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 21, 2026 disclosing 37,776 shares of Tesla, Inc.. This represents a change in shares of 1.82% during the quarter.

Flagship Harbor Advisors, Llc has a history of taking positions in derivatives of the underlying security (TSLA) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

CH:TSLA / Tesla, Inc. Historical Put/Call Ratio
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)
2026-04-28 2026-03-31 13F TESLA COM 88160R101 38,462 686 1.82 14,298 -15.83 0.6288
2026-01-21 2025-12-31 13F TESLA Common Stock 88160R101 37,776 -1,513 -3.85 16,989 -2.77 0.8017
2025-11-05 2025-09-30 13F TESLA COM 88160R101 39,289 -86 -0.22 17,473 39.70 0.7602
2025-08-04 2025-06-30 13F TESLA COM 88160R101 39,375 -60 -0.15 12,508 22.39 0.5924
2025-04-22 2025-03-31 13F TESLA COM 88160R101 39,435 -3,899 -9.00 10,220 -41.61 0.5374
2025-01-21 2024-12-31 13F TESLA COM 88160R101 43,334 -4,946 -10.24 17,500 38.55 0.9191
2024-10-21 2024-09-30 13F TESLA COM 88160R101 48,280 -105 -0.22 12,632 31.93 0.6937
2025-12-02 2024-06-30 13F TESLA COM 88160R101 48,385 -1,653 -3.30 9,574 8.84 0.5755
2024-04-16 2024-03-31 13F TESLA COM 88160R101 50,038 -4,416 -8.11 8,796 -34.99 0.5653
2024-01-10 2023-12-31 13F TESLA COM 88160R101 54,454 -480 -0.87 13,531 -1.56 0.9840
2023-10-17 2023-09-30 13F TESLA COM 88160R101 54,934 146 0.27 13,746 -4.16 1.1432
2023-07-11 2023-06-30 13F TESLA COM 88160R101 54,788 -494 -0.89 14,342 25.05 1.1846
2023-04-12 2023-03-31 13F TESLA COM 88160R101 55,282 466 0.85 11,469 69.85 1.0802
2023-01-13 2022-12-31 13F TESLA COM 88160R101 54,816 3,872 7.60 6,752 -50.03 0.6922
2022-10-13 2022-09-30 13F TESLA COM 88160R101 50,944 33,560 193.05 13,513 15.43 1.5672
2022-07-13 2022-06-30 13F TESLA COM 88160R101 17,384 1,189 7.34 11,707 -32.92 1.3150
2022-04-13 2022-03-31 13F TESLA COM 88160R101 16,195 763 4.94 17,452 7.01 1.6816
2022-02-17 2021-12-31 13F/A-1 TESLA COM 88160R101 15,432 -484 -3.04 16,308 50.75 1.5433
2022-02-10 2021-12-31 13F TESLA COM 88160R101 15,432 -484 16,308 1.5433
2021-11-01 2021-09-30 13F TESLA COM 88160R101 15,916 0 0.00 10,818 0.00 1.1623
2021-07-26 2021-06-30 13F TESLA COM 88160R101 15,916 -313 -1.93 10,818 -0.20 1.1604
2021-05-03 2021-03-31 13F TESLA COM 88160R101 16,229 -758 -4.46 10,840 -9.57 1.2306
2021-02-08 2020-12-31 13F TESLA COM 88160R101 16,987 -3,193 -15.82 11,987 38.47 1.4863
2020-10-13 2020-09-30 13F TESLA Common Stock 88160R101 20,180 16,540 454.40 8,657 120.28 1.1690
2020-07-31 2020-06-30 13F TESLA Common Stock 88160R101 3,640 292 8.72 3,930 124.06 0.5770
2020-05-12 2020-03-31 13F TESLA Common Stock 88160R101 3,348 455 15.73 1,754 44.96 0.3508
2020-02-14 2019-12-31 13F TESLA Common Stock 88160R101 2,893 -51 -1.73 1,210 70.66 0.2119
2019-10-22 2019-09-30 13F TESLA Common Stock 88160R101 2,944 167 6.01 709 14.35 0.1390
2019-07-22 2019-06-30 13F TESLA Common Stock 88160R101 2,777 245 9.68 620 -12.43 0.1287
2019-04-15 2019-03-31 13F TESLA Common Stock 88160R101 2,532 522 25.97 708 5.99 0.1454
2019-01-26 2018-12-31 13F TESLA COM 88160R101 2,010 -644 -24.27 668 -19.03 0.1623
2018-11-05 2018-09-30 13F TESLA Common Stock 88160R101 2,654 262 10.95 825 0.61 0.1530
2018-08-14 2018-06-30 13F TESLA Common Stock 88160R101 2,392 199 9.07 820 46.43 0.1641
2018-04-23 2018-03-31 13F TESLA COM 88160R101 2,193 1,015 86.16 560 43.22 0.1665
2018-01-24 2017-12-31 13F TESLA COM 88160R101 1,178 140 13.49 391 10.76 0.1124
2017-10-23 2017-09-30 13F TESLA COM 88160R101 1,038 51 5.17 353 14.24 0.1145
2017-08-09 2017-06-30 13F TESLA COM 88160R101 987 4 0.41 309 5.82 0.1073
2017-05-16 2017-03-31 13F TESLA COM 88160R101 983 -7 -0.71 292 22.18 0.1116
2017-05-15 2016-12-31 13F TESLA MTRS COM 88160R101 990 990 239 0.1031
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2021-02-08 2020-12-31 13F TESLA Listed Options Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-10-13 2020-09-30 13F TESLA Listed Options Call 1 8 n/a n/a n/a
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.