Diamondback Energy, Inc.
US ˙ NasdaqGS ˙ US25278X1090

SecurityFANG / Diamondback Energy, Inc.
InstitutionKempner Capital Management Inc.
Latest Disclosed Ownership4,705 shares
Latest Disclosed Value $ 725,000
Kempner Capital Management Inc. reports 8.92% decrease in ownership of FANG / Diamondback Energy, Inc.

On January 12, 2026 - Kempner Capital Management Inc. filed a 13F-HR form disclosing ownership of 4,705 shares of Diamondback Energy, Inc. (US:FANG) valued at $707,303 USD as of December 31, 2025. The entity filed a previous 13F-HR on October 16, 2025 disclosing 5,166 shares of Diamondback Energy, Inc.. This represents a change in shares of -8.92% during the quarter. The current value of the position is $906,277 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)
2026-01-12 2025-12-31 13F DIAMONDBACKENRGYINC COM 25278X109 4,705 -461 -8.92 725 -1.89 0.6850
2025-10-16 2025-09-30 13F DIAMONDBACK ENERGY COM 25278X109 5,166 -4,649 -47.37 739 -45.22 0.6151
2025-07-15 2025-06-30 13F DIAMONDBACK ENERGY COM 25278X109 9,815 0 0.00 1,349 134,800.00 0.7225
2025-04-21 2025-03-31 13F DIAMONDBACK ENERGY COM 25278X109 9,815 0 0.00 2 -99.94 0.8830
2025-01-23 2024-12-31 13F DIAMONDBACK ENERGY COM 25278X109 9,815 0 0.00 1,608 -4.96 0.8826
2024-10-21 2024-09-30 13F DIAMONDBACK ENERGY COM 25278X109 9,815 0 0.00 1,692 -13.89 0.8661
2024-07-19 2024-06-30 13F DIAMONDBACK ENERGY COM 25278X109 9,815 -9,856 -50.10 1,965 -49.59 1.0421
2024-04-11 2024-03-31 13F DIAMONDBACK ENERGY COM 25278X109 19,671 -1 -0.01 3,898 27.76 2.1136
2024-01-24 2023-12-31 13F DIAMONDBACK ENERGY COM 25278X109 19,672 -6 -0.03 3,051 0.10 1.7057
2023-10-19 2023-09-30 13F DIAMONDBACK ENERGY COM 25278X109 19,678 0 0.00 3,048 17.91 1.8345
2023-07-18 2023-06-30 13F DIAMONDBACK ENERGY COM 25278X109 19,678 19,678 2,585 1.6559
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.