Diamondback Energy, Inc.
US ˙ NasdaqGS ˙ US25278X1090

SecurityFANG / Diamondback Energy, Inc.
InstitutionGuggenheim Capital Llc
Latest Disclosed Ownership74,060 shares
Latest Disclosed Value $ 14,648,327
Guggenheim Capital Llc reports 11.22% decrease in ownership of FANG / Diamondback Energy, Inc.

On May 15, 2026 - Guggenheim Capital Llc filed a 13F-HR form disclosing ownership of 74,060 shares of Diamondback Energy, Inc. (US:FANG) valued at $14,648,327 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 83,415 shares of Diamondback Energy, Inc.. This represents a change in shares of -11.22% during the quarter. The current value of the position is $14,265,437 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 74,060 -9,355 -11.22 14,648 16.82 0.0566
2026-02-17 2025-12-31 13F DIAMONDBACK ENERGY COM 25278X109 83,415 -4,155 -4.74 12,540 0.06 0.0898
2025-11-13 2025-09-30 13F DIAMONDBACK ENERGY COM 25278X109 87,570 1,536 1.79 12,531 6.01 0.0909
2025-08-13 2025-06-30 13F DIAMONDBACK ENERGY COM 25278X109 86,034 9,515 12.43 11,821 -3.37 0.0938
2025-05-14 2025-03-31 13F DIAMONDBACK ENERGY COM 25278X109 76,519 -16,657 -17.88 12,234 -19.86 0.1124
2025-02-13 2024-12-31 13F DIAMONDBACK ENERGY COM 25278X109 93,176 -72,321 -43.70 15,265 -46.50 0.1237
2024-11-13 2024-09-30 13F DIAMONDBACK ENERGY COM 25278X109 165,497 152 0.09 28,532 -13.80 0.1997
2024-08-14 2024-06-30 13F DIAMONDBACK ENERGY COM 25278X109 165,345 5,522 3.46 33,100 4.51 0.2347
2024-05-14 2024-03-31 13F DIAMONDBACK ENERGY COM 25278X109 159,823 -8,571 -5.09 31,672 21.28 0.2232
2024-02-14 2023-12-31 13F DIAMONDBACK ENERGY COM 25278X109 168,394 -794 -0.47 26,115 -0.34 0.1973
2023-11-14 2023-09-30 13F DIAMONDBACK ENERGY COM 25278X109 169,188 3,898 2.36 26,204 20.68 0.2253
2023-08-11 2023-06-30 13F DIAMONDBACK ENERGY COM 25278X109 165,290 20,716 14.33 21,712 11.10 0.1704
2023-05-11 2023-03-31 13F DIAMONDBACK ENERGY COM 25278X109 144,574 41,425 40.16 19,542 38.52 0.1645
2023-02-14 2022-12-31 13F DIAMONDBACK ENERGY COM 25278X109 103,149 23,323 29.22 14,109 46.73 0.1239
2022-11-14 2022-09-30 13F DIAMONDBACK ENERGY COM 25278X109 79,826 24,462 44.18 9,615 43.36 0.0881
2022-08-15 2022-06-30 13F DIAMONDBACK ENERGY COM 25278X109 55,364 -3,078 -5.27 6,707 -16.28 0.0529
2022-05-16 2022-03-31 13F DIAMONDBACK ENERGY COM 25278X109 58,442 -6,475 -9.97 8,011 14.41 0.0482
2022-02-14 2021-12-31 13F DIAMONDBACK ENERGY COM 25278X109 64,917 35,431 120.16 7,002 150.79 0.0365
2021-11-15 2021-09-30 13F DIAMONDBACK ENERGY COM 25278X109 29,486 -3,787 -11.38 2,792 -10.60 0.0168
2021-08-13 2021-06-30 13F DIAMONDBACK ENERGY COM 25278X109 33,273 3,703 12.52 3,123 43.72 0.0184
2021-05-13 2021-03-31 13F DIAMONDBACK ENERGY COM 25278X109 29,570 -3,078 -9.43 2,173 37.53 0.0143
2021-02-16 2020-12-31 13F DIAMONDBACK ENERGY COM 25278X109 32,648 -11,062 -25.31 1,580 19.97 0.0099
2020-11-13 2020-09-30 13F DIAMONDBACK ENERGY COM 25278X109 43,710 4,454 11.35 1,317 -19.79 0.0095
2020-08-14 2020-06-30 13F DIAMONDBACK ENERGY COM 25278X109 39,256 8,488 27.59 1,642 103.47 0.0127
2020-06-02 2020-03-31 13F DIAMONDBACK ENERGY COM 25278X109 30,768 -7,851 -20.33 807 -77.50 0.0081
2020-02-20 2019-12-31 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 38,619 -72,685 -65.30 3,587 -64.16 0.0269
2020-02-14 2019-12-31 13F DIAMONDBACK ENERGY COM 25278X109 38,619 -72,685 3,587 21,259.4320
2020-02-20 2019-09-30 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 111,304 13,010 13.24 10,008 -6.56 0.0800
2019-11-14 2019-09-30 13F DIAMONDBACK ENERGY COM 25278X109 111,304 13,010 10,008 73,341.5596
2019-08-14 2019-06-30 13F DIAMONDBACK ENERGY COM 25278X109 98,294 -2,269 -2.26 10,711 4.91 0.0872
2019-05-15 2019-03-31 13F DIAMONDBACK ENERGY COM 25278X109 100,563 -3,193 -3.08 10,210 6.14 0.0832
2019-02-14 2018-12-31 13F DIAMONDBACK ENERGY COM 25278X109 103,756 9,355 9.91 9,619 -24.63 0.0815
2018-11-14 2018-09-30 13F DIAMONDBACK ENERGY COM 25278X109 94,401 1,423 1.53 12,762 4.32 0.0832
2018-08-14 2018-06-30 13F DIAMONDBACK ENERGY COM 25278X109 92,978 -287 -0.31 12,234 3.69 0.0817
2018-05-15 2018-03-31 13F DIAMONDBACK ENERGY COM 25278X109 93,265 1,273 1.38 11,799 1.58 0.0288
2018-02-14 2017-12-31 13F DIAMONDBACK ENERGY COM 25278X109 91,992 -11,159 -10.82 11,615 14.94 0.0275
2017-11-14 2017-09-30 13F DIAMONDBACK ENERGY COM 25278X109 103,151 30,208 41.41 10,105 55.97 0.0237
2017-08-14 2017-06-30 13F DIAMONDBACK ENERGY COM 25278X109 72,943 -1,033 -1.40 6,479 -15.56 0.0172
2017-05-15 2017-03-31 13F DIAMONDBACK ENERGY COM 25278X109 73,976 -10,627 -12.56 7,673 -10.27 0.0208
2017-02-14 2016-12-31 13F DIAMONDBACK ENERGY COM 25278X109 84,603 8,968 11.86 8,551 17.10 0.0245
2016-11-14 2016-09-30 13F DIAMONDBACK ENERGY COM 25278X109 75,635 53,243 237.78 7,302 257.42 0.0227
2016-08-15 2016-06-30 13F DIAMONDBACK ENERGY COM 25278X109 22,392 1,241 5.87 2,043 25.18 0.0064
2016-05-16 2016-03-31 13F DIAMONDBACK ENERGY COM 25278X109 21,151 -3,940 -15.70 1,632 -2.80 0.0051
2016-02-16 2015-12-31 13F DIAMONDBACK ENERGY COM 25278X109 25,091 -3,399 -11.93 1,679 -8.80 0.0049
2015-11-16 2015-09-30 13F DIAMONDBACK ENERGY COM 25278X109 28,490 17,746 165.17 1,841 127.28 0.0057
2015-08-14 2015-06-30 13F DIAMONDBACK ENERGY COM 25278X109 10,744 1,425 15.29 810 13.13 0.0020
2015-05-18 2015-03-31 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 9,319 857 10.13 716 41.50 0.0017
2015-05-15 2015-03-31 13F DIAMONDBACK ENERGY COM 25278X109 9,319 716
2015-02-17 2014-12-31 13F DIAMONDBACK ENERGY COM 25278X109 8,462 901 11.92 506 -10.44 0.0013
2014-11-14 2014-09-30 13F DIAMONDBACK ENERGY COM 25278X109 7,561 -3,403 -31.04 565 -41.99 0.0014
2014-08-14 2014-06-30 13F DIAMONDBACK ENERGY COM 25278X109 10,964 3,209 41.38 974 86.59 0.0025
2014-05-16 2014-03-31 13F DIAMONDBACK ENERGY COM 25278X109 7,755 -1,260 -13.98 522 9.43 0.0015
2014-02-14 2013-12-31 13F DIAMONDBACK ENERGY COM 25278X109 9,015 9,015 477 0.0014
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.