Diamondback Energy, Inc.
US ˙ NasdaqGS ˙ US25278X1090

SecurityFANG / Diamondback Energy, Inc.
InstitutionAdvisors Asset Management, Inc.
Latest Disclosed Ownership24,713 shares
Latest Disclosed Value $ 4,887,984
Advisors Asset Management, Inc. reports 3.55% increase in ownership of FANG / Diamondback Energy, Inc.

On May 15, 2026 - Advisors Asset Management, Inc. filed a 13F-HR form disclosing ownership of 24,713 shares of Diamondback Energy, Inc. (US:FANG) valued at $4,887,984 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 23,866 shares of Diamondback Energy, Inc.. This represents a change in shares of 3.55% during the quarter. The current value of the position is $4,760,218 USD.

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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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 DIAMONDBACK ENERGY COM 25278X109 24,713 847 3.55 4,888 36.24 0.0812
2026-02-12 2025-12-31 13F DIAMONDBACK ENERGY COM 25278X109 23,866 -3,718 -13.48 3,588 -9.12 0.0602
2025-11-06 2025-09-30 13F DIAMONDBACK ENERGY COM 25278X109 27,584 324 1.19 3,947 5.39 0.0670
2025-08-12 2025-06-30 13F DIAMONDBACK ENERGY COM 25278X109 27,260 -979 -3.47 3,746 -17.04 0.0671
2025-05-15 2025-03-31 13F DIAMONDBACK ENERGY COM 25278X109 28,239 573 2.07 4,515 -0.40 0.0848
2025-02-10 2024-12-31 13F DIAMONDBACK ENERGY COM 25278X109 27,666 -2,405 -8.00 4,533 -12.58 0.0835
2024-11-08 2024-09-30 13F DIAMONDBACK ENERGY COM 25278X109 30,071 2,152 7.71 5,184 -7.25 0.0952
2024-08-14 2024-06-30 13F DIAMONDBACK ENERGY COM 25278X109 27,919 241 0.87 5,589 1.91 0.1090
2024-05-14 2024-03-31 13F DIAMONDBACK ENERGY COM 25278X109 27,678 487 1.79 5,485 30.08 0.1054
2024-02-14 2023-12-31 13F DIAMONDBACK ENERGY COM 25278X109 27,191 -3,849 -12.40 4,217 -12.29 0.0861
2023-11-14 2023-09-30 13F DIAMONDBACK ENERGY COM 25278X109 31,040 707 2.33 4,807 20.66 0.1037
2023-08-14 2023-06-30 13F DIAMONDBACK ENERGY COM 25278X109 30,333 -3,679 -10.82 3,985 -13.33 0.0814
2023-05-12 2023-03-31 13F DIAMONDBACK ENERGY COM 25278X109 34,012 2,371 7.49 4,597 6.24 0.0935
2023-02-13 2022-12-31 13F DIAMONDBACK ENERGY COM 25278X109 31,641 -4,724 -12.99 4,328 -1.23 0.0892
2022-11-08 2022-09-30 13F DIAMONDBACK ENERGY INC USD 0.0 COM 25278X109 36,365 425 1.18 4,381 0.62 0.0921
2022-08-08 2022-06-30 13F DIAMONDBACK ENERGY COM 25278X109 35,940 958 2.74 4,354 -9.20 0.0826
2022-05-17 2022-03-31 13F DIAMONDBACK ENERGY COM 25278X109 34,982 4,265 13.88 4,795 44.73 0.0738
2022-02-15 2021-12-31 13F DIAMONDBACK ENERGY INC USD 0.0 COM 25278X109 30,717 1,329 4.52 3,313 19.09 0.0473
2021-11-12 2021-09-30 13F DIAMONDBACK ENERGY COM 25278X109 29,388 1,983 7.24 2,782 8.12 0.0423
2021-07-30 2021-06-30 13F DIAMONDBACK ENERGY COM 25278X109 27,405 2,760 11.20 2,573 42.08 0.0380
2021-05-07 2021-03-31 13F DIAMONDBACK ENERGY COM 25278X109 24,645 4,192 20.50 1,811 82.93 0.0282
2021-02-12 2020-12-31 13F DIAMONDBACK ENERGY COM 25278X109 20,453 1,710 9.12 990 75.22 0.0164
2020-11-16 2020-09-30 13F DIAMONDBACK ENERGY COM 25278X109 18,743 -1,856 -9.01 565 -34.38 0.0104
2020-08-12 2020-06-30 13F DIAMONDBACK ENERGY COM 25278X109 20,599 -7,446 -26.55 861 17.14 0.0168
2020-05-15 2020-03-31 13F DIAMONDBACK ENERGY COM 25278X109 28,045 -10,523 -27.28 735 -79.48 0.0175
2020-05-20 2019-12-31 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 38,568 -3,809 -8.99 3,581 -6.01 0.0628
2020-02-14 2019-12-31 13F DIAMONDBACK ENERGY COM 25278X109 38,568 -3,809 3,581 31,695.2357
2019-11-14 2019-09-30 13F DIAMONDBACK ENERGY COM 25278X109 42,377 -4,372 -9.35 3,810 -25.21 0.0702
2019-11-14 2019-06-30 13F/A-1 DIAMONDBACK ENERGY INC USD 0.0 COM 25278X109 46,749 -1,901 -3.91 5,094 3.14 0.0919
2019-08-14 2019-06-30 13F DIAMONDBACK ENERGY COM 25278X109 46,749 -1,901 5,094
2019-05-15 2019-03-31 13F DIAMONDBACK ENERGY INC USD 0.0 COM 25278X109 48,650 -1,873 -3.71 4,939 5.47 0.0879
2019-02-06 2018-12-31 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 50,523 -6,395 -11.24 4,683 -39.14 0.0943
2019-01-31 2018-12-31 13F DIAMONDBACK ENERGY COM 25278X109 50,523 -6,395 4,683
2018-11-15 2018-09-30 13F DIAMONDBACK ENERGY COM 25278X109 56,918 2,542 4.67 7,695 7.56 0.1258
2018-08-22 2018-06-30 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 54,376 652 1.21 7,154 6.84 0.1215
2018-08-15 2018-06-30 13F DIAMONDBACK ENERGY COM 25278X109 26 -53,698 7,154
2018-05-15 2018-03-31 13F DIAMONDBACK ENERGY COM 25278X109 53,724 2,911 5.73 6,696 4.38 0.1122
2018-02-13 2017-12-31 13F DIAMONDBACK ENERGY COM 25278X109 50,813 898 1.80 6,415 31.19 0.1055
2017-11-07 2017-09-30 13F DIAMONDBACK ENERGY COM 25278X109 49,915 8,195 19.64 4,890 31.98 0.0819
2017-08-02 2017-06-30 13F DIAMONDBACK ENERGY COM 25278X109 41,720 5,400 14.87 3,705 -1.65 0.0619
2017-05-02 2017-03-31 13F DIAMONDBACK ENERGY COM 25278X109 36,320 11,482 46.23 3,767 57.09 0.0631
2016-10-31 2016-09-30 13F DIAMONDBACK ENERGY COM 25278X109 24,838 7,215 40.94 2,398 49.22 0.0393
2016-08-08 2016-06-30 13F DIAMONDBACK ENERGY COM 25278X109 17,623 1,264 7.73 1,607 27.24 0.0261
2016-05-16 2016-03-31 13F DIAMONDBACK ENERGY COM 25278X109 16,359 9,674 144.71 1,263 182.55 0.0210
2016-02-10 2015-12-31 13F DIAMONDBACK ENERGY COM 25278X109 6,685 2,517 60.39 447 66.17 0.0071
2015-11-16 2015-09-30 13F DIAMONDBACK ENERGY COM 25278X109 4,168 2,892 226.65 269 180.21 0.0043
2015-08-11 2015-06-30 13F DIAMONDBACK ENERGY COM 25278X109 1,276 1,276 96 0.0013
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.