Diamondback Energy, Inc.
US ˙ NasdaqGS ˙ US25278X1090

SecurityFANG / Diamondback Energy, Inc.
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership14,411 shares
Latest Disclosed Value $ 2,172,316
Parallel Advisors, LLC ownership in FANG / Diamondback Energy, Inc.

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 14,411 shares of Diamondback Energy, Inc. (US:FANG) valued at $2,166,406 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 14,652 shares of Diamondback Energy, Inc.. This represents a change in shares of -1.64% during the quarter. The current value of the position is $3,034,812 USD.

Parallel Advisors, 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 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.

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)
2026-02-11 2025-12-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 14,411 -241 -1.64 2,172 3.63 0.0397
2025-11-13 2025-09-30 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 14,652 291 2.03 2,097 6.23 0.0384
2025-07-08 2025-06-30 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 14,361 -4,264 -22.89 1,973 -33.73 0.0394
2025-04-08 2025-03-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 18,625 1,474 8.59 2,978 5.98 0.0671
2025-02-10 2024-12-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 17,151 906 5.58 2,810 0.32 0.0632
2024-11-13 2024-09-30 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 16,245 2,326 16.71 2,801 0.50 0.0658
2024-08-08 2024-06-30 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 13,919 755 5.74 2,786 6.83 0.0714
2024-05-06 2024-03-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 13,164 2,267 20.80 2,609 54.41 0.0707
2024-02-12 2023-12-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 10,897 1,122 11.48 1,690 11.56 0.0501
2024-05-20 2023-09-30 13F/A-1 DIAMONDBACK ENERGY INC COM Stock 25278X109 9,775 1,179 13.72 1,514 34.10 0.0504
2023-11-14 2023-09-30 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 9,775 1,179 1,514 0.0504
2024-05-20 2023-06-30 13F/A-1 DIAMONDBACK ENERGY INC COM Stock 25278X109 8,596 162 1.92 1,129 -0.96 0.0364
2023-08-04 2023-06-30 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 8,596 162 1,129 0.0364
2024-05-20 2023-03-31 13F/A-1 DIAMONDBACK ENERGY INC COM Stock 25278X109 8,434 607 7.76 1,140 6.54 0.0384
2023-04-25 2023-03-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 8,434 607 1,140 0.0384
2023-02-06 2022-12-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 7,827 2,387 43.88 1,071 63.36 0.0464
2022-11-10 2022-09-30 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 5,440 3,753 222.47 655 221.08 0.0301
2022-08-01 2022-06-30 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 1,687 107 6.77 204 -7.27 0.0094
2022-04-28 2022-03-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 1,580 10 0.64 220 30.18 0.0087
2022-01-20 2021-12-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 1,570 52 3.43 169 17.36 0.0063
2021-11-02 2021-09-30 13F/A-1 DIAMONDBACK ENERGY INC COM Stock 25278X109 1,518 175 13.03 144 14.29 0.0058
2021-08-06 2021-06-30 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 1,343 86 6.84 126 36.96 0.0053
2021-04-23 2021-03-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 1,257 29 2.36 92 55.93 0.0043
2021-02-02 2020-12-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 1,228 54 4.60 59 68.57 0.0032
2020-10-27 2020-09-30 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 1,174 -74 -5.93 35 -32.69 0.0022
2020-07-16 2020-06-30 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 1,248 -90 -6.73 52 48.57 0.0034
2020-04-27 2020-03-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 1,338 -181 -11.92 35 -75.18 0.0028
2020-01-30 2019-12-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 1,519 268 21.42 141 25.89 0.0106
2019-11-01 2019-09-30 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 1,251 23 1.87 112 -16.42 0.0096
2019-08-05 2019-06-30 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 1,228 -247 -16.75 134 -10.67 0.0131
2019-05-01 2019-03-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 1,475 -793 -34.96 150 -28.57 0.0168
2019-02-05 2018-12-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 2,268 -517 -18.56 210 -44.30 0.0293
2018-11-01 2018-09-30 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 2,785 -191 -6.42 377 -3.58 0.0468
2018-07-30 2018-06-30 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 2,976 -508 -14.58 391 -11.34 0.0559
2018-05-08 2018-03-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 3,484 -1,637 -31.97 441 -31.84 0.0689
2018-02-13 2017-12-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 5,121 -375 -6.82 647 6.07 0.1059
2017-11-15 2017-09-30 13F/A-1 DIAMONDBACK ENERGY INC COM Stock 25278X109 5,496 -9,216 -62.64 610 -56.77 0.1049
2017-08-07 2017-06-30 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 14,712 3,396 30.01 1,411 24.32 0.2661
2017-05-12 2017-03-31 13F/A-1 DIAMONDBACK ENERGY INC COM Stock 25278X109 11,316 6,202 121.27 1,135 119.54 0.2256
2017-05-12 2017-03-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 11,316 1,135
2017-02-14 2016-12-31 13F DIAMONDBACK ENERGY INC COM Stock 25278X109 5,114 5,114 517 0.1214
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
(%)
2022-01-19 2021-12-31 13F DIAMONDBACK ENERGY INC COM Stock Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F DIAMONDBACK ENERGY INC COM Stock Call 1,343 126 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.