Diamondback Energy, Inc.
US ˙ NasdaqGS ˙ US25278X1090

SecurityFANG / Diamondback Energy, Inc.
InstitutionNissay Asset Management Corp /japan/ /adv
Latest Disclosed Ownership66,671 shares
Latest Disclosed Value $ 13,186,857
Nissay Asset Management Corp /japan/ /adv reports 2.01% increase in ownership of FANG / Diamondback Energy, Inc.

On May 15, 2026 - Nissay Asset Management Corp /japan/ /adv filed a 13F-HR form disclosing ownership of 66,671 shares of Diamondback Energy, Inc. (US:FANG) valued at $13,186,857 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 65,360 shares of Diamondback Energy, Inc.. This represents a change in shares of 2.01% during the quarter. The current value of the position is $12,842,168 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.

Upgrade to unlock premium data and export to Excel .

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 66,671 1,311 2.01 13,187 34.21 0.0699
2026-02-17 2025-12-31 13F DIAMONDBACK ENERGY COM 25278X109 65,360 3,068 4.93 9,826 10.23 0.0511
2025-11-14 2025-09-30 13F DIAMONDBACK ENERGY COM 25278X109 62,292 650 1.05 8,914 5.24 0.0492
2025-08-14 2025-06-30 13F DIAMONDBACK ENERGY COM 25278X109 61,642 3,261 5.59 8,470 -9.26 0.0496
2025-05-15 2025-03-31 13F DIAMONDBACK ENERGY COM 25278X109 58,381 5,980 11.41 9,334 12.49 0.0607
2025-02-14 2024-12-31 13F DIAMONDBACK ENERGY COM 25278X109 52,401 15,298 41.23 8,297 29.72 0.0506
2024-11-14 2024-09-30 13F DIAMONDBACK ENERGY COM 25278X109 37,103 4,138 12.55 6,397 -3.08 0.0405
2024-08-14 2024-06-30 13F DIAMONDBACK ENERGY COM 25278X109 32,965 3,542 12.04 6,599 13.19 0.0437
2024-05-15 2024-03-31 13F DIAMONDBACK ENERGY COM 25278X109 29,423 7,594 34.79 5,831 72.23 0.0404
2024-02-14 2023-12-31 13F DIAMONDBACK ENERGY COM 25278X109 21,829 2,045 10.34 3,385 10.48 0.0272
2023-11-14 2023-09-30 13F DIAMONDBACK ENERGY COM 25278X109 19,784 1,534 8.41 3,064 27.83 0.0272
2023-08-14 2023-06-30 13F DIAMONDBACK ENERGY COM 25278X109 18,250 368 2.06 2,397 -0.83 0.0207
2023-05-15 2023-03-31 13F DIAMONDBACK ENERGY COM 25278X109 17,882 -734 -3.94 2,417 -5.07 0.0216
2023-02-14 2022-12-31 13F DIAMONDBACK ENERGY COM 25278X109 18,616 -510 -2.67 2,546 10.50 0.0243
2022-11-14 2022-09-30 13F DIAMONDBACK ENERGY COM 25278X109 19,126 662 3.59 2,304 3.00 0.0242
2022-08-15 2022-06-30 13F DIAMONDBACK ENERGY COM 25278X109 18,464 -783 -4.07 2,237 -15.20 0.0223
2022-05-16 2022-03-31 13F DIAMONDBACK ENERGY COM 25278X109 19,247 447 2.38 2,638 30.08 0.0230
2022-02-14 2021-12-31 13F DIAMONDBACK ENERGY COM 25278X109 18,800 18,800 2,028 0.0155
2021-02-08 2020-12-31 13F DIAMONDBACK ENERGY COM 25278X109 0 -16,756 -100.00 0 -100.00
2020-10-20 2020-09-30 13F DIAMONDBACK ENERGY COM 25278X109 16,756 403 2.46 505 -26.17 0.0085
2020-07-27 2020-06-30 13F DIAMONDBACK ENERGY COM 25278X109 16,353 3,214 24.46 684 98.84 0.0133
2020-05-05 2020-03-31 13F DIAMONDBACK ENERGY COM 25278X109 13,139 298 2.32 344 -71.14 0.0088
2020-02-14 2019-12-31 13F DIAMONDBACK ENERGY COM 25278X109 12,841 406 3.26 1,192 6.62 0.0265
2019-11-14 2019-09-30 13F DIAMONDBACK ENERGY COM 25278X109 12,435 648 5.50 1,118 -12.93 0.0277
2019-08-07 2019-06-30 13F DIAMONDBACK ENERGY COM 25278X109 11,787 -480 -3.91 1,284 3.13 0.0325
2019-05-03 2019-03-31 13F DIAMONDBACK ENERGY COM 25278X109 12,267 643 5.53 1,245 15.49 0.0329
2019-02-06 2018-12-31 13F DIAMONDBACK ENERGY COM 25278X109 11,624 4,476 62.62 1,078 11.59 0.0329
2018-10-30 2018-09-30 13F DIAMONDBACK ENERGY COM 25278X109 7,148 290 4.23 966 7.10 0.0260
2018-08-08 2018-06-30 13F DIAMONDBACK ENERGY COM 25278X109 6,858 770 12.65 902 17.14 0.0264
2018-05-14 2018-03-31 13F DIAMONDBACK ENERGY COM 25278X109 6,088 102 1.70 770 1.99 0.0241
2018-02-14 2017-12-31 13F DIAMONDBACK ENERGY COM 25278X109 5,986 5,986 755 0.0230
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.