Constellation Energy Corporation
MX ˙ BMV ˙ US21037T1097
SecurityMX:CEG / Constellation Energy Corporation
InstitutionParallax Volatility Advisers, L.P.
Latest Disclosed Ownership16,830 shares
Latest Disclosed Value $ 4,673,692
Parallax Volatility Advisers, L.P. ownership in CEG / Constellation Energy Corporation

On May 15, 2026 - Parallax Volatility Advisers, L.P. filed a 13F-HR form disclosing ownership of 16,830 shares of Constellation Energy Corporation (MX:CEG) valued at $4,673,692 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 32,476 shares of Constellation Energy Corporation. This represents a change in shares of -48.18% during the quarter.

Parallax Volatility Advisers, L.P. has a history of taking positions in derivatives of the underlying security (CEG) in the form of stock options. The firm currently holds call options representing 20,200 of underlying shares valued at $5,609,540 USD and put options representing 179,300 of underlying shares valued at $49,791,610 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.

MX:CEG / Constellation Energy Corporation 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)
2026-05-15 2026-03-31 13F CONSTELLATION ENERGY COM 21037T109 16,830 -15,646 -48.18 4,674 -59.27 0.0121
2026-02-17 2025-12-31 13F CONSTELLATION ENERGY COM 21037T109 32,476 6,901 26.98 11,473 36.33 0.0226
2025-11-14 2025-09-30 13F CONSTELLATION ENERGY COM 21037T109 25,575 25,575 8,416 0.0128
2025-08-14 2025-06-30 13F CONSTELLATION ENERGY COM 21037T109 0 -30,976 -100.00 0 -100.00
2025-05-15 2025-03-31 13F CONSTELLATION ENERGY COM 21037T109 30,976 30,976 6,246 0.0169
2024-05-15 2024-03-31 13F CONSTELLATION ENERGY COM 21037T109 0 -981 -100.00 0 -100.00
2024-02-14 2023-12-31 13F CONSTELLATION ENERGY COM 21037T109 981 -3,482 -78.02 115 -76.54 0.0002
2023-11-14 2023-09-30 13F CONSTELLATION ENERGY COM 21037T109 4,463 45 1.02 487 20.30 0.0011
2023-08-14 2023-06-30 13F CONSTELLATION ENERGY COM 21037T109 4,418 4,418 404 0.0009
2023-02-27 2022-12-31 13F/A-1 CONSTELLATION ENERGY COM 21037T109 0 -15,861 -100.00 0 -100.00
2023-02-14 2022-12-31 13F CONSTELLATION ENERGY COM 21037T109 0 -15,861 0
2022-11-21 2022-09-30 13F/A-1 CONSTELLATION ENERGY COM 21037T109 15,861 15,861 1,319 0.0020
2022-11-14 2022-09-30 13F CONSTELLATION ENERGY COM 21037T109 15,861 15,861 1,319 0.0021
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
(%)
2026-05-15 2026-03-31 13F CONSTELLATION ENERGY COM Call 20,200 2.02 5,610 -19.80 n/a n/a n/a
2026-02-17 2025-12-31 13F CONSTELLATION ENERGY COM Call 19,800 -23.85 6,995 -18.25 n/a n/a n/a
2025-11-14 2025-09-30 13F CONSTELLATION ENERGY COM Call 26,000 -79.91 8,556 -79.52 n/a n/a n/a
2025-08-14 2025-06-30 13F CONSTELLATION ENERGY COM Call 129,400 43,033.33 41,765 69,508.33 n/a n/a n/a
2025-05-15 2025-03-31 13F CONSTELLATION ENERGY COM Call 300 -95.00 60 -95.53 n/a n/a n/a
2025-02-14 2024-12-31 13F CONSTELLATION ENERGY COM Call 6,000 -76.92 1,342 -80.15 n/a n/a n/a
2024-11-14 2024-09-30 13F CONSTELLATION ENERGY COM Call 26,000 333.33 6,761 462.86 n/a n/a n/a
2024-08-14 2024-06-30 13F CONSTELLATION ENERGY COM Call 6,000 -94.29 1,202 -93.81 n/a n/a n/a
2024-05-15 2024-03-31 13F CONSTELLATION ENERGY COM Call 105,000 19,409 n/a n/a n/a
2024-02-14 2023-12-31 13F CONSTELLATION ENERGY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-11-14 2023-09-30 13F CONSTELLATION ENERGY COM Call 400 44 n/a n/a n/a
2023-02-27 2022-12-31 13F/A CONSTELLATION ENERGY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-02-14 2022-12-31 13F CONSTELLATION ENERGY COM Call 0 0 n/a n/a n/a
2022-11-21 2022-09-30 13F/A CONSTELLATION ENERGY COM Call 200 16 n/a n/a n/a
2022-11-14 2022-09-30 13F CONSTELLATION ENERGY COM Call 200 16 n/a n/a n/a
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
(%)
2026-05-15 2026-03-31 13F CONSTELLATION ENERGY COM Put 179,300 14.13 49,792 -10.28 n/a n/a n/a
2026-02-17 2025-12-31 13F CONSTELLATION ENERGY COM Put 157,100 16.37 55,499 24.93 n/a n/a n/a
2025-11-14 2025-09-30 13F CONSTELLATION ENERGY COM Put 135,000 -24.96 44,424 -23.49 n/a n/a n/a
2025-08-14 2025-06-30 13F CONSTELLATION ENERGY COM Put 179,900 153.74 58,065 306.18 n/a n/a n/a
2025-05-15 2025-03-31 13F CONSTELLATION ENERGY COM Put 70,900 305.14 14,296 265.23 n/a n/a n/a
2025-02-14 2024-12-31 13F CONSTELLATION ENERGY COM Put 17,500 16.67 3,915 0.36 n/a n/a n/a
2024-11-14 2024-09-30 13F CONSTELLATION ENERGY COM Put 15,000 3,900 n/a n/a n/a
2024-08-14 2024-06-30 13F CONSTELLATION ENERGY COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F CONSTELLATION ENERGY COM Put 5,000 -43.18 924 -10.12 n/a n/a n/a
2024-02-14 2023-12-31 13F CONSTELLATION ENERGY COM Put 8,800 -82.81 1,029 -81.59 n/a n/a n/a
2023-11-14 2023-09-30 13F CONSTELLATION ENERGY COM Put 51,200 8.47 5,585 29.23 n/a n/a n/a
2023-08-14 2023-06-30 13F CONSTELLATION ENERGY COM Put 47,200 4,321 n/a n/a n/a
2023-02-27 2022-12-31 13F/A CONSTELLATION ENERGY COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-02-14 2022-12-31 13F CONSTELLATION ENERGY COM Put 0 0 n/a n/a n/a
2022-11-21 2022-09-30 13F/A CONSTELLATION ENERGY COM Put 600 50 n/a n/a n/a
2022-11-14 2022-09-30 13F CONSTELLATION ENERGY COM Put 600 50 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.