Vistra Corp.
MX ˙ BMV ˙ US92840M1027
SecurityMX:VST / Vistra Corp.
InstitutionHartree Partners, LP
Latest Disclosed Ownership26,500 shares
Latest Disclosed Value $ 3,983,745
Hartree Partners, LP ownership in VST / Vistra Corp.

On May 12, 2026 - Hartree Partners, LP filed a 13F-HR form disclosing ownership of 26,500 shares of Vistra Corp. (MX:VST) valued at $3,983,745 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 0 shares of Vistra Corp..

Hartree Partners, LP has a history of taking positions in derivatives of the underlying security (VST) in the form of stock options.

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.

MX:VST / Vistra Corp. 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)
2026-05-12 2026-03-31 13F VISTRA COM 92840M102 26,500 26,500 3,984 0.7806
2026-02-17 2025-12-31 13F VISTRA COM 92840M102 0 -1,850 -100.00 0 -100.00
2025-11-13 2025-09-30 13F VISTRA COM 92840M102 1,850 -18,850 -91.06 362 -90.97 0.1246
2025-08-13 2025-06-30 13F VISTRA COM NEW 92840M102 20,700 20,700 4,012 1.1287
2025-05-14 2025-03-31 13F VISTRA COM 92840M102 0 -143,400 -100.00 0 -100.00
2025-02-12 2024-12-31 13F VISTRA COM 92840M102 143,400 -21,350 -12.96 19,771 1.23 7.3158
2024-11-13 2024-09-30 13F VISTRA COM 92840M102 164,750 -205,650 -55.52 19,529 -38.68 4.4807
2024-08-14 2024-06-30 13F VISTRA COM 92840M102 370,400 -411,500 -52.63 31,847 -41.52 7.9625
2024-08-14 2024-06-30 13F VISTRA PUT 92840M952 1,390 1,390 1,286 0.3215
2024-05-02 2024-03-31 13F VISTRA COM 92840M102 781,900 -99,024 -11.24 54,459 60.49 14.1135
2024-02-13 2023-12-31 13F VISTRA COM 92840M102 880,924 75,500 9.37 33,933 26.98 12.2573
2023-11-14 2023-09-30 13F VISTRA COM 92840M102 805,424 132,201 19.64 26,724 51.22 10.6523
2023-08-11 2023-06-30 13F VISTRA COM 92840M102 673,223 507,823 307.03 17,672 345.25 8.7951
2023-05-11 2023-03-31 13F VISTRA COM 92840M102 165,400 -118,600 -41.76 3,970 -39.75 2.5509
2023-02-14 2022-12-31 13F VISTRA COM 92840M102 284,000 284,000 6,589 5.6146
2021-08-16 2021-06-30 13F VISTRA COM 92840M102 0 -137,000 -100.00 0 -100.00
2021-05-14 2021-03-31 13F VISTRA COM 92840M102 137,000 84,500 160.95 2,422 134.69 0.4180
2021-02-16 2020-12-31 13F VISTRA COM 92840M102 52,500 52,500 1,032 0.2343
2020-12-01 2020-09-30 13F/A-1 VISTRA ENERGY COM 92840M102 0 -198,308 -100.00 0 -100.00
2020-08-13 2020-06-30 13F VISTRA ENERGY COM 92840M102 198,308 -23,192 -10.47 3,692 4.44 4.1184
2020-05-14 2020-03-31 13F VISTRA ENERGY COM 92840M102 221,500 179,000 421.18 3,535 261.82 3.8581
2020-02-13 2019-12-31 13F/A-1 VISTRA ENERGY COM 92840M102 42,500 42,500 977 1.2185
2020-02-12 2019-12-31 13F VISTRA ENERGY COM 92840M102 977,075 977,075 977 1,218.4915
2019-11-14 2019-09-30 13F VISTRA ENERGY COM 92840M102 0 -95,000 -100.00 0 -100.00
2019-08-06 2019-06-30 13F VISTRA ENERGY COM 92840M102 95,000 -185,000 -66.07 2,151 -70.49 1.5638
2019-05-06 2019-03-31 13F VISTRA ENERGY COM 92840M102 280,000 157,000 127.64 7,288 158.90 7.3517
2019-02-01 2018-12-31 13F VISTRA ENERGY COM 92840M102 123,000 23,000 23.00 2,815 13.14 3.9875
2018-11-13 2018-09-30 13F VISTRA ENERGY COM 92840M102 100,000 100,000 2,488 1.2295
2018-07-27 2018-06-30 13F VISTRA ENERGY COM 92840M102 0 -295,000 -100.00 0 -100.00
2018-05-03 2018-03-31 13F VISTRA ENERGY COM 92840M102 295,000 295,000 6,145 5.5354
Disclosed Put 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
(%)
2025-02-12 2024-12-31 13F VISTRA PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-11-13 2024-09-30 13F VISTRA PUT Put 50,000 3,497.12 5,927 361.25 n/a n/a n/a
2024-08-14 2024-06-30 13F VISTRA PUT 1,390 1,286 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.