Diamondback Energy, Inc.
US ˙ NasdaqGS ˙ US25278X1090

SecurityFANG / Diamondback Energy, Inc.
InstitutionTwo Sigma Advisers, Lp
Latest Disclosed Ownership191,200 shares
Latest Disclosed Value $ 28,743,096
Two Sigma Advisers, Lp ownership in FANG / Diamondback Energy, Inc.

On February 17, 2026 - Two Sigma Advisers, Lp filed a 13F-HR form disclosing ownership of 191,200 shares of Diamondback Energy, Inc. (US:FANG) valued at $28,743,096 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 14, 2025 disclosing 231,800 shares of Diamondback Energy, Inc.. This represents a change in shares of -17.52% during the quarter. The current value of the position is $36,828,944 USD.

Two Sigma Advisers, Lp 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 and put 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)
2026-02-17 2025-12-31 13F DIAMONDBACK ENERGY COM 25278X109 191,200 -40,600 -17.52 28,743 -13.35 0.0559
2025-11-14 2025-09-30 13F DIAMONDBACK ENERGY COM 25278X109 231,800 231,800 33,171 0.0664
2025-08-14 2025-06-30 13F DIAMONDBACK ENERGY COM 25278X109 0 -216,500 -100.00 0 -100.00
2025-05-15 2025-03-31 13F DIAMONDBACK ENERGY COM 25278X109 216,500 -32,400 -13.02 34,614 -15.11 0.0779
2025-02-14 2024-12-31 13F DIAMONDBACK ENERGY COM 25278X109 248,900 248,900 40,777 0.0944
2024-11-14 2024-09-30 13F DIAMONDBACK ENERGY COM 25278X109 0 -3,700 -100.00 0 -100.00
2024-08-14 2024-06-30 13F DIAMONDBACK ENERGY COM 25278X109 3,700 3,700 741 0.0017
2023-08-14 2023-06-30 13F DIAMONDBACK ENERGY COM 25278X109 0 -37,800 -100.00 0 -100.00
2023-05-15 2023-03-31 13F DIAMONDBACK ENERGY COM 25278X109 37,800 -77,200 -67.13 5,109 -67.52 0.0132
2023-02-14 2022-12-31 13F DIAMONDBACK ENERGY COM 25278X109 115,000 112,800 5,127.27 15,730 5,835.47 0.0439
2022-11-14 2022-09-30 13F DIAMONDBACK ENERGY COM 25278X109 2,200 2,200 265 0.0008
2021-08-16 2021-06-30 13F DIAMONDBACK ENERGY COM 25278X109 0 -32,235 -100.00 0 -100.00
2021-05-17 2021-03-31 13F DIAMONDBACK ENERGY COM 25278X109 32,235 32,235 2,369 0.0065
2020-11-16 2020-09-30 13F DIAMONDBACK ENERGY COM 25278X109 0 -5,300 -100.00 0 -100.00
2020-09-15 2020-06-30 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 5,300 5,300 222 0.0007
2020-08-14 2020-06-30 13F DIAMONDBACK ENERGY COM 25278X109 5,300 5,300 222 641.5063
2018-08-14 2018-06-30 13F DIAMONDBACK ENERGY COM 25278X109 0 -206,670 -100.00 0 -100.00
2018-05-15 2018-03-31 13F DIAMONDBACK ENERGY COM 25278X109 206,670 206,670 26,148 0.0709
2017-05-15 2017-03-31 13F DIAMONDBACK ENERGY COM 25278X109 0 -99,724 -100.00 0 -100.00
2017-02-14 2016-12-31 13F DIAMONDBACK ENERGY COM 25278X109 99,724 -95,176 -48.83 10,078 -46.44 0.0385
2016-11-14 2016-09-30 13F DIAMONDBACK ENERGY COM 25278X109 194,900 188,600 2,993.65 18,816 3,172.35 0.0801
2016-08-15 2016-06-30 13F DIAMONDBACK ENERGY COM 25278X109 6,300 6,300 0.00 575 0.0029
2016-05-16 2016-03-31 13F DIAMONDBACK ENERGY COMMON STOCK 25278X109 0 0 0 0.0000
2016-02-16 2015-12-31 13F DIAMONDBACK ENERGY COMMON STOCK 25278X109 0 0 0 0.0000
2015-11-16 2015-09-30 13F DIAMONDBACK ENERGY COMMON STOCK 25278X109 0 -67,700 -100.00 0 -100.00
2016-02-09 2015-06-30 13F/A-1 DIAMONDBACK ENERGY COMMON STOCK 25278X109 67,700 67,700 -85.64 5,103 -85.53 0.0393
2015-08-14 2015-06-30 13F DIAMONDBACK ENERGY COMMON STOCK 25278X109 62,500 4,712
2015-02-17 2014-12-31 13F DIAMONDBACK ENERGY COM 25278X109 0 -471,500 -100.00 0 -100.00
2016-02-09 2014-09-30 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 471,500 78,200 19.88 35,259 0.96 0.2779
2014-11-14 2014-09-30 13F DIAMONDBACK ENERGY COM 25278X109 464,600 34,598
2016-02-09 2014-06-30 13F/A-1 DIAMONDBACK ENERGY COMMON STOCK 25278X109 393,300 -46,200 -10.51 34,925 18.05 0.2811
2014-08-14 2014-06-30 13F DIAMONDBACK ENERGY COMMON STOCK 25278X109 393,300 34,925
2014-05-15 2014-03-31 13F DIAMONDBACK ENERGY COMMON STOCK 25278X109 439,500 236,200 116.18 29,584 175.33 0.2690
2014-02-14 2013-12-31 13F DIAMONDBACK ENERGY COMMON STOCK 25278X109 203,300 89,500 78.65 10,745 121.41 0.1038
2013-11-14 2013-09-30 13F DIAMONDBACK ENERGY COMMON STOCK 25278X109 113,800 113,800 4,853 0.0578
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
(%)
2016-05-16 2016-03-31 13F DIAMONDBACK ENERGY COM Call 0 0 n/a n/a n/a
2015-02-17 2014-12-31 13F DIAMONDBACK ENERGY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2016-02-09 2014-09-30 13F/A DIAMONDBACK ENERGY COM Call 8,000 598 n/a n/a n/a
2014-11-14 2014-09-30 13F DIAMONDBACK ENERGY COM Call 8,000 598 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
(%)
2016-05-16 2016-03-31 13F DIAMONDBACK ENERGY COM Put 0 0 n/a n/a n/a
2015-05-15 2015-03-31 13F DIAMONDBACK ENERGY COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2016-02-09 2014-12-31 13F/A DIAMONDBACK ENERGY COM Put 4,000 -55.56 239 -64.49 n/a n/a n/a
2015-02-17 2014-12-31 13F DIAMONDBACK ENERGY COM Put 4,000 239 n/a n/a n/a
2016-02-09 2014-09-30 13F/A DIAMONDBACK ENERGY COM Put 9,000 673 n/a n/a n/a
2014-11-14 2014-09-30 13F DIAMONDBACK ENERGY COM Put 9,000 673 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.