Diamondback Energy, Inc.
US ˙ NasdaqGS ˙ US25278X1090

SecurityFANG / Diamondback Energy, Inc.
InstitutionPeapack Gladstone Financial Corp
Latest Disclosed Ownership3,105 shares
Latest Disclosed Value $ 614
Peapack Gladstone Financial Corp reports 125.98% increase in ownership of FANG / Diamondback Energy, Inc.

On May 15, 2026 - Peapack Gladstone Financial Corp filed a 13F-HR form disclosing ownership of 3,105 shares of Diamondback Energy, Inc. (US:FANG) valued at $614,138 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 1,374 shares of Diamondback Energy, Inc.. The current value of the position is $598,085 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 3,105 1,731 125.98 1 0.0079
2026-02-10 2025-12-31 13F DIAMONDBACK ENERGY COM 25278X109 1,374 -951 -40.90 0 0.0026
2025-11-14 2025-09-30 13F DIAMONDBACK ENERGY COM 25278X109 2,325 694 42.55 0 0.0043
2025-08-14 2025-06-30 13F DIAMONDBACK ENERGY COM 25278X109 1,631 -22 -1.33 0 0.0032
2025-05-12 2025-03-31 13F DIAMONDBACK ENERGY COM 25278X109 1,653 72 4.55 0 0.0039
2025-02-13 2024-12-31 13F DIAMONDBACK ENERGY COM 25278X109 1,581 32 2.07 0 0.0038
2024-11-26 2024-09-30 13F DIAMONDBACK ENERGY COM 25278X109 1,549 -1,864 -54.61 0 0.0038
2024-08-13 2024-06-30 13F DIAMONDBACK ENERGY COM 25278X109 3,413 77 2.31 1 0.0105
2024-05-10 2024-03-31 13F DIAMONDBACK ENERGY COM 25278X109 3,336 1,620 94.41 1 0.0104
2024-02-13 2023-12-31 13F DIAMONDBACK ENERGY COM 25278X109 1,716 32 1.90 0 0.0045
2023-11-14 2023-09-30 13F DIAMONDBACK ENERGY COM 25278X109 1,684 38 2.31 0 0.0048
2023-08-14 2023-06-30 13F DIAMONDBACK ENERGY COM 25278X109 1,646 -37 -2.20 0 0.0038
2023-05-15 2023-03-31 13F DIAMONDBACK ENERGY COM 25278X109 1,683 -35 -2.04 0 -100.00 0.0043
2023-02-14 2022-12-31 13F DIAMONDBACK ENERGY COM 25278X109 1,718 -53 -2.99 235 10.33 0.0046
2022-11-14 2022-09-30 13F DIAMONDBACK ENERGY COM 25278X109 1,771 -21 -1.17 213 -1.84 0.0043
2022-08-12 2022-06-30 13F DIAMONDBACK ENERGY COM 25278X109 1,792 -33 -1.81 217 -13.20 0.0050
2022-05-16 2022-03-31 13F DIAMONDBACK ENERGY COM 25278X109 1,825 1,825 250 0.0049
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.