Diamondback Energy, Inc.
US ˙ NasdaqGS ˙ US25278X1090

SecurityFANG / Diamondback Energy, Inc.
InstitutionWalleye Capital LLC
Latest Disclosed Ownership8,904 shares
Latest Disclosed Value $ 1,761,122
Walleye Capital LLC ownership in FANG / Diamondback Energy, Inc.

On May 13, 2026 - Walleye Capital LLC filed a 13F-HR/A form disclosing ownership of 8,904 shares of Diamondback Energy, Inc. (US:FANG) valued at $1,761,122 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 10,204 shares of Diamondback Energy, Inc.. This represents a change in shares of -12.74% during the quarter. The current value of the position is $1,715,088 USD.

Walleye Capital LLC has a history of taking positions in derivatives of the underlying security (FANG) in the form of stock options. The firm currently holds call options representing 6,000 of underlying shares valued at $1,186,740 USD and put options representing 31,300 of underlying shares valued at $6,190,827 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.

FANG / Diamondback Energy, 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)
2026-05-13 2026-03-31 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 8,904 -1,300 -12.74 1,761 14.87 0.0073
2026-05-08 2026-03-31 13F DIAMONDBACK ENERGY COM 25278X109 8,904 -1,300 1,761 0.0073
2026-02-13 2025-12-31 13F DIAMONDBACK ENERGY COM 25278X109 10,204 5,142 101.58 1,534 111.74 0.0047
2025-11-14 2025-09-30 13F DIAMONDBACK ENERGY COM 25278X109 5,062 -19,379 -79.29 724 -78.44 0.0027
2025-08-13 2025-06-30 13F DIAMONDBACK ENERGY COM 25278X109 24,441 15,177 163.83 3,358 126.74 0.0130
2025-05-14 2025-03-31 13F DIAMONDBACK ENERGY COM 25278X109 9,264 -1,261 -11.98 1,481 -14.10 0.0067
2025-02-13 2024-12-31 13F DIAMONDBACK ENERGY COM 25278X109 10,525 -34,812 -76.78 1,724 -77.94 0.0042
2024-11-14 2024-09-30 13F DIAMONDBACK ENERGY COM 25278X109 45,337 -4,204 -8.49 7,816 -21.19 0.0163
2024-08-14 2024-06-30 13F DIAMONDBACK ENERGY COM 25278X109 49,541 -15,426 -23.74 9,918 -22.97 0.0177
2024-05-15 2024-03-31 13F DIAMONDBACK ENERGY COM 25278X109 64,967 64,967 12,875 0.0229
2024-02-14 2023-12-31 13F DIAMONDBACK ENERGY COM 25278X109 0 -34,180 -100.00 0 -100.00
2023-11-21 2023-09-30 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 34,180 -154,274 -81.86 5,294 -78.62 0.0135
2023-11-14 2023-09-30 13F DIAMONDBACK ENERGY COM 25278X109 34,180 -154,274 5,294 0.0136
2023-08-14 2023-06-30 13F DIAMONDBACK ENERGY COM 25278X109 188,454 -36,821 -16.34 24,755 -18.70 0.0897
2023-05-15 2023-03-31 13F DIAMONDBACK ENERGY COM 25278X109 225,275 84,750 60.31 30,450 58.42 0.4562
2023-02-14 2022-12-31 13F DIAMONDBACK ENERGY COM 25278X109 140,525 -31,938 -18.52 19,221 -7.48 0.3505
2022-11-14 2022-09-30 13F DIAMONDBACK ENERGY COM 25278X109 172,463 64,803 60.19 20,775 59.28 0.3965
2022-08-19 2022-06-30 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 107,660 -41,025 -27.59 13,043 -36.01 0.3594
2022-08-08 2022-06-30 13F DIAMONDBACK ENERGY COM 25278X109 107,660 -41,025 13,043 0.3594
2022-05-27 2022-03-31 13F/A-01 DIAMONDBACK ENERGY COM 25278X109 148,685 114,772 338.43 20,382 457.19 0.5448
2022-05-16 2022-03-31 13F DIAMONDBACK ENERGY COM 25278X109 148,685 114,772 20,382 0.4150
2022-05-27 2021-12-31 13F/A-01 DIAMONDBACK ENERGY COM 25278X109 33,913 -5,608 -14.19 3,658 -2.22 0.1136
2022-03-03 2021-12-31 13F DIAMONDBACK ENERGY COM 25278X109 33,913 -5,608 3,658 0.0914
2021-11-15 2021-09-30 13F DIAMONDBACK ENERGY COM 25278X109 39,521 -616 -1.53 3,741 -0.72 0.1060
2021-08-16 2021-06-30 13F DIAMONDBACK ENERGY COM 25278X109 40,137 40,137 3,768 0.1284
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
(%)
2026-05-13 2026-03-31 13F/A DIAMONDBACK ENERGY COM Call 6,000 -90.70 1,187 -87.77 n/a n/a n/a
2026-05-08 2026-03-31 13F DIAMONDBACK ENERGY COM Call 6,000 1,187 n/a n/a n/a
2026-02-13 2025-12-31 13F DIAMONDBACK ENERGY COM Call 64,500 148.08 9,696 160.65 n/a n/a n/a
2025-11-14 2025-09-30 13F DIAMONDBACK ENERGY COM Call 26,000 -61.71 3,721 -60.12 n/a n/a n/a
2025-08-13 2025-06-30 13F DIAMONDBACK ENERGY COM Call 67,900 48.25 9,329 27.41 n/a n/a n/a
2025-05-14 2025-03-31 13F DIAMONDBACK ENERGY COM Call 45,800 -26.01 7,323 -27.80 n/a n/a n/a
2025-02-13 2024-12-31 13F DIAMONDBACK ENERGY COM Call 61,900 19.73 10,141 13.78 n/a n/a n/a
2024-11-14 2024-09-30 13F DIAMONDBACK ENERGY COM Call 51,700 -32.06 8,913 -41.49 n/a n/a n/a
2024-08-14 2024-06-30 13F DIAMONDBACK ENERGY COM Call 76,100 -17.01 15,234 -16.17 n/a n/a n/a
2024-05-15 2024-03-31 13F DIAMONDBACK ENERGY COM Call 91,700 -16.79 18,172 6.34 n/a n/a n/a
2024-02-14 2023-12-31 13F DIAMONDBACK ENERGY COM Call 110,200 29.04 17,090 29.21 n/a n/a n/a
2023-11-21 2023-09-30 13F/A DIAMONDBACK ENERGY COM Call 85,400 340.21 13,227 419.07 n/a n/a n/a
2023-11-14 2023-09-30 13F DIAMONDBACK ENERGY COM Call 85,400 13,227 n/a n/a n/a
2023-08-14 2023-06-30 13F DIAMONDBACK ENERGY COM Call 19,400 312.77 2,548 301.26 n/a n/a n/a
2023-05-15 2023-03-31 13F DIAMONDBACK ENERGY COM Call 4,700 635 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
(%)
2026-05-13 2026-03-31 13F/A DIAMONDBACK ENERGY COM Put 31,300 -26.00 6,191 -2.64 n/a n/a n/a
2026-05-08 2026-03-31 13F DIAMONDBACK ENERGY COM Put 31,300 6,191 n/a n/a n/a
2026-02-13 2025-12-31 13F DIAMONDBACK ENERGY COM Put 42,300 -23.51 6,359 -19.65 n/a n/a n/a
2025-11-14 2025-09-30 13F DIAMONDBACK ENERGY COM Put 55,300 -31.30 7,913 -28.45 n/a n/a n/a
2025-08-13 2025-06-30 13F DIAMONDBACK ENERGY COM Put 80,500 973.33 11,061 822.44 n/a n/a n/a
2025-05-14 2025-03-31 13F DIAMONDBACK ENERGY COM Put 7,500 -74.66 1,199 -75.27 n/a n/a n/a
2025-02-13 2024-12-31 13F DIAMONDBACK ENERGY COM Put 29,600 -15.91 4,849 -20.09 n/a n/a n/a
2024-11-14 2024-09-30 13F DIAMONDBACK ENERGY COM Put 35,200 -69.94 6,068 -74.11 n/a n/a n/a
2024-08-14 2024-06-30 13F DIAMONDBACK ENERGY COM Put 117,100 21.73 23,442 22.97 n/a n/a n/a
2024-05-15 2024-03-31 13F DIAMONDBACK ENERGY COM Put 96,200 180.47 19,064 258.39 n/a n/a n/a
2024-02-14 2023-12-31 13F DIAMONDBACK ENERGY COM Put 34,300 -30.43 5,319 -30.33 n/a n/a n/a
2023-11-21 2023-09-30 13F/A DIAMONDBACK ENERGY COM Put 49,300 866.67 7,636 1,041.26 n/a n/a n/a
2023-11-14 2023-09-30 13F DIAMONDBACK ENERGY COM Put 49,300 7,636 n/a n/a n/a
2023-08-14 2023-06-30 13F DIAMONDBACK ENERGY COM Put 5,100 15.91 670 12.63 n/a n/a n/a
2023-05-15 2023-03-31 13F DIAMONDBACK ENERGY COM Put 4,400 1,000.00 595 1,000.00 n/a n/a n/a
2023-02-14 2022-12-31 13F DIAMONDBACK ENERGY COM Put 400 55 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.