Diamondback Energy, Inc.
US ˙ NasdaqGS ˙ US25278X1090

SecurityFANG / Diamondback Energy, Inc.
InstitutionStrs Ohio
Latest Disclosed Ownership84,107 shares
Latest Disclosed Value $ 16,635,524
Strs Ohio reports 17.94% decrease in ownership of FANG / Diamondback Energy, Inc.

On April 24, 2026 - Strs Ohio filed a 13F-HR form disclosing ownership of 84,107 shares of Diamondback Energy, Inc. (US:FANG) valued at $16,635,524 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 102,496 shares of Diamondback Energy, Inc.. This represents a change in shares of -17.94% during the quarter. The current value of the position is $17,712,093 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)
2026-04-24 2026-03-31 13F DIAMONDBACK ENERGY COM_STK 25278X109 84,107 -18,389 -17.94 16,636 7.96 0.0660
2026-02-02 2025-12-31 13F DIAMONDBACK ENERGY COM_STK 25278X109 102,496 -64 -0.06 15,408 4.99 0.0575
2025-10-30 2025-09-30 13F DIAMONDBACK ENERGY COM_STK 25278X109 102,560 -25,498 -19.91 14,676 -16.59 0.0538
2025-08-04 2025-06-30 13F DIAMONDBACK ENERGY COM_STK 25278X109 128,058 -20,942 -14.06 17,595 -26.14 0.0657
2025-05-28 2025-03-31 13F DIAMONDBACK ENERGY COM_STK 25278X109 149,000 -23,000 -13.37 23,822 -15.46 0.0998
2025-05-28 2024-12-31 13F DIAMONDBACK ENERGY COM_STK 25278X109 172,000 -41,474 -19.43 28,179 -23.43 0.1118
2024-11-01 2024-09-30 13F DIAMONDBACK ENERGY COM_STK 25278X109 213,474 -20,566 -8.79 36,803 -21.45 0.1416
2024-08-05 2024-06-30 13F DIAMONDBACK ENERGY COM_STK 25278X109 234,040 -22,868 -8.90 46,852 93,604.00 0.1851
2024-05-13 2024-03-31 13F DIAMONDBACK ENERGY COM_STK 25278X109 256,908 -34,595 -11.87 51 11.11 0.2028
2024-01-30 2023-12-31 13F DIAMONDBACK ENERGY COM 25278X109 291,503 3,006 1.04 45 2.27 0.1882
2023-10-26 2023-09-30 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 288,497 13,694 4.98 45 22.22 0.1989
2023-10-26 2023-09-30 13F DIAMONDBACK ENERGY COM 25278X109 288,497 13,694 45 0.1989
2023-07-31 2023-06-30 13F DIAMONDBACK ENERGY COM 25278X109 274,803 -66,039 -19.38 36 -21.74 0.1524
2023-08-02 2023-03-31 13F/A-2 DIAMONDBACK ENERGY COM 25278X109 340,842 -17,678 -4.93 46 -6.12 0.1996
2023-08-02 2023-03-31 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 340,842 46
2023-04-27 2023-03-31 13F DIAMONDBACK ENERGY COM 25278X109 340,842 -17,678 46 0.2378
2023-01-26 2022-12-31 13F DIAMONDBACK ENERGY COM 25278X109 358,520 -8,728 -2.38 49 -99.89 0.2214
2022-10-27 2022-09-30 13F DIAMONDBACK ENERGY COM 25278X109 367,248 33,046 9.89 44,238 9.26 0.2108
2022-07-25 2022-06-30 13F DIAMONDBACK ENERGY COM 25278X109 334,202 -66,128 -16.52 40,488 -26.22 0.1824
2022-04-21 2022-03-31 13F DIAMONDBACK ENERGY COM 25278X109 400,330 58,663 17.17 54,877 48.93 0.2007
2022-01-24 2021-12-31 13F DIAMONDBACK ENERGY COM 25278X109 341,667 -24,584 -6.71 36,848 6.28 0.1279
2021-10-22 2021-09-30 13F DIAMONDBACK ENERGY COM 25278X109 366,251 -288,786 -44.09 34,672 -43.62 0.1305
2021-07-26 2021-06-30 13F DIAMONDBACK ENERGY COM 25278X109 655,037 42,758 6.98 61,501 36.68 0.2212
2021-04-23 2021-03-31 13F DIAMONDBACK ENERGY COM 25278X109 612,279 128,279 26.50 44,996 92.09 0.1694
2021-01-25 2020-12-31 13F DIAMONDBACK ENERGY COM 25278X109 484,000 482,013 24,258.33 23,425 39,603.39 0.0904
2020-12-14 2020-09-30 13F DIAMONDBACK ENERGY COM 25278X109 1,987 0 0.00 59 -28.92 0.0002
2020-07-23 2020-06-30 13F DIAMONDBACK ENERGY COM 25278X109 1,987 -60,000 -96.79 83 -94.89 0.0004
2020-04-23 2020-03-31 13F DIAMONDBACK ENERGY COM 25278X109 61,987 -374,000 -85.78 1,624 -95.99 0.0085
2020-01-24 2019-12-31 13F DIAMONDBACK ENERGY COM 25278X109 435,987 23,000 5.57 40,485 9.03 0.1696
2019-10-21 2019-09-30 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 412,987 23,000 5.90 37,131 -12.62 0.1628
2019-10-21 2019-09-30 13F DIAMONDBACK ENERGY COM 25278X109 412,987 -23,000 37,131 164,343.8654
2019-07-25 2019-06-30 13F DIAMONDBACK ENERGY COM 25278X109 389,987 178,000 83.97 42,496 97.44 0.1889
2019-04-19 2019-03-31 13F DIAMONDBACK ENERGY COM 25278X109 211,987 903 0.43 21,523 10.00 0.0976
2019-01-23 2018-12-31 13F DIAMONDBACK ENERGY COM 25278X109 211,084 -1,867 -0.88 19,567 -32.03 0.0993
2018-10-19 2018-09-30 13F DIAMONDBACK ENERGY COM 25278X109 212,951 -30,165 -12.41 28,788 -10.00 0.1262
2018-08-06 2018-06-30 13F DIAMONDBACK ENERGY COM 25278X109 243,116 26,010 11.98 31,986 16.45 0.1377
2018-04-20 2018-03-31 13F DIAMONDBACK ENERGY COM 25278X109 217,106 2,552 1.19 27,468 1.41 0.1215
2018-01-23 2017-12-31 13F DIAMONDBACK ENERGY COM 25278X109 214,554 -13,033 -5.73 27,087 21.50 0.1157
2017-10-23 2017-09-30 13F DIAMONDBACK ENERGY COM 25278X109 227,587 13,244 6.18 22,294 17.12 0.0957
2017-07-26 2017-06-30 13F DIAMONDBACK ENERGY COM 25278X109 214,343 -1,086 -0.50 19,035 -14.81 0.0848
2017-04-26 2017-03-31 13F DIAMONDBACK ENERGY COM 25278X109 215,429 4,299 2.04 22,343 4.72 0.0968
2017-01-24 2016-12-31 13F DIAMONDBACK ENERGY COM 25278X109 211,130 46,130 27.96 21,336 33.94 0.0940
2016-10-27 2016-09-30 13F DIAMONDBACK ENERGY COM 25278X109 165,000 0 0.00 15,929 5.85 0.0712
2016-07-26 2016-06-30 13F DIAMONDBACK ENERGY COM 25278X109 165,000 0 0.00 15,049 18.18 0.0669
2016-04-25 2016-03-31 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 165,000 -60,000 -26.67 12,734 -15.40 0.0572
2016-01-28 2015-12-31 13F DIAMONDBACK ENERGY COM 25278X109 225,000 0 0.00 15,052 3.56 0.0673
2015-10-21 2015-09-30 13F DIAMONDBACK ENERGY COM 25278X109 225,000 -30,000 -11.76 14,535 -24.38 0.0692
2015-08-04 2015-06-30 13F DIAMONDBACK ENERGY COM 25278X109 255,000 -36,900 -12.64 19,221 -14.30 0.0844
2015-04-27 2015-03-31 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 291,900 -5,400 -1.82 22,429 26.20 0.0989
2015-04-21 2015-03-31 13F DIAMONDBACK ENERGY COM 25278X109 291,900 22,429
2015-01-23 2014-12-31 13F DIAMONDBACK ENERGY COM 25278X109 297,300 -4,300 -1.43 17,773 -21.20 0.0771
2014-10-29 2014-09-30 13F/A-1 DIAMONDBACK ENERGY COM 25278X109 301,600 49,200 19.49 22,554 0.63 0.0996
2014-10-20 2014-09-30 13F DIAMONDBACK ENERGY COM 25278X109 301,600 22,554
2014-07-24 2014-06-30 13F DIAMONDBACK ENERGY COM 25278X109 252,400 238,300 1,690.07 22,413 2,261.75 0.0999
2014-04-28 2014-03-31 13F DIAMONDBACK ENERGY COM 25278X109 14,100 0 0.00 949 27.38 0.0043
2014-01-30 2013-12-31 13F DIAMONDBACK ENERGY COM 25278X109 14,100 -10,700 -43.15 745 -29.52 0.0033
2013-10-24 2013-09-30 13F DIAMONDBACK ENERGY COM 25278X109 24,800 4,100 19.81 1,057 53.19 0.0047
2013-08-12 2013-06-30 13F DIAMONDBACK ENERGY COM 25278X109 20,700 20,700 690 0.0030
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.