Diamondback Energy, Inc.
US ˙ NasdaqGS ˙ US25278X1090

SecurityFANG / Diamondback Energy, Inc.
InstitutionTributary Capital Management, LLC
Latest Disclosed Ownership1,880 shares
Latest Disclosed Value $ 371,845
Tributary Capital Management, LLC ownership in FANG / Diamondback Energy, Inc.

On May 4, 2026 - Tributary Capital Management, LLC filed a 13F-HR form disclosing ownership of 1,880 shares of Diamondback Energy, Inc. (US:FANG) valued at $371,845 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 1,880 shares of Diamondback Energy, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $362,126 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)
2026-05-04 2026-03-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 1,880 0 0.00 372 31.56 0.0361
2026-01-27 2025-12-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 1,880 -120 -6.00 283 -1.40 0.0278
2026-01-27 2025-09-30 13F/A-1 DIAMONDBACK ENERGY INC COM COM 25278X109 2,000 -130 -6.10 286 -2.05 0.0259
2025-07-30 2025-06-30 13F DIAMONDBACK ENERGY INC COM COM 25278X109 2,130 -50 -2.29 293 -16.09 0.0259
2025-05-02 2025-03-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 2,180 -75 -3.33 349 -5.69 0.0305
2025-01-21 2024-12-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 2,255 475 26.69 369 20.59 0.0286
2024-10-24 2024-09-30 13F DIAMONDBACK ENERGY INC COM COM 25278X109 1,780 -110 -5.82 307 -19.05 0.0238
2024-07-24 2024-06-30 13F DIAMONDBACK ENERGY INC COM COM 25278X109 1,890 -80 -4.06 378 -3.08 0.0314
2024-04-18 2024-03-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 1,970 0 0.00 390 27.87 0.0320
2024-01-16 2023-12-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 1,970 -40 -1.99 306 -1.93 0.0257
2023-10-11 2023-09-30 13F DIAMONDBACK ENERGY INC COM COM 25278X109 2,010 0 0.00 311 17.80 0.0295
2023-07-17 2023-06-30 13F DIAMONDBACK ENERGY INC COM COM 25278X109 2,010 2,010 264 0.0237
2022-07-19 2022-06-30 13F DIAMONDBACK ENERGY INC COM COM 25278X109 0 -12,850 -100.00 0 -100.00
2022-04-22 2022-03-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 12,850 -13,550 -51.33 1,761 -38.15 0.1391
2022-01-06 2021-12-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 26,400 -3,000 -10.20 2,847 2.30 0.2150
2021-10-14 2021-09-30 13F DIAMONDBACK ENERGY INC COM COM 25278X109 29,400 6,100 26.18 2,783 27.19 0.2150
2021-07-15 2021-06-30 13F DIAMONDBACK ENERGY INC COM COM 25278X109 23,300 6,600 39.52 2,188 78.32 0.1659
2021-04-20 2021-03-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 16,700 16,700 1,227 0.0958
2020-04-14 2020-03-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 0 -3,600 -100.00 0 -100.00
2020-01-16 2019-12-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 3,600 800 28.57 334 32.54 0.0234
2019-10-15 2019-09-30 13F DIAMONDBACK ENERGY INC COM COM 25278X109 2,800 0 0.00 252 -17.38 0.0183
2019-07-11 2019-06-30 13F DIAMONDBACK ENERGY INC COM COM 25278X109 2,800 -100 -3.45 305 3.74 0.0215
2019-04-17 2019-03-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 2,900 -2,700 -48.21 294 -43.35 0.0213
2019-01-23 2018-12-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 5,600 -10,200 -64.56 519 -75.70 0.0475
2018-10-17 2018-09-30 13F/A-1 DIAMONDBACK ENERGY INC COM COM 25278X109 15,800 -300 -1.86 2,136 0.85 0.1620
2018-10-16 2018-09-30 13F DIAMONDBACK ENERGY INC COM COM 25278X109 15,800 -300 2,136
2018-10-17 2018-06-30 13F/A-1 DIAMONDBACK ENERGY INC COM COM 25278X109 16,100 12,300 323.68 2,118 340.33 0.1661
2018-07-25 2018-06-30 13F DIAMONDBACK ENERGY INC COM COM 25278X109 16,100 12,300 2,118
2018-04-19 2018-03-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 3,800 -600 -13.64 481 -13.33 0.0402
2018-01-25 2017-12-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 4,400 -300 -6.38 555 20.65 0.0483
2017-10-19 2017-09-30 13F/A-1 DIAMONDBACK ENERGY INC COM COM 25278X109 4,700 0 0.00 460 10.31 0.0395
2017-10-19 2017-09-30 13F DIAMONDBACK ENERGY INC COM COM 25278X109 4,700 0 460
2017-07-24 2017-06-30 13F DIAMONDBACK ENERGY INC COM COM 25278X109 4,700 0 0.00 417 -14.37 0.0367
2017-05-11 2017-03-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 4,700 0 0.00 487 2.53 0.0476
2017-02-15 2016-12-31 13F DIAMONDBACK ENERGY INC COM COM 25278X109 4,700 1,200 34.29 475 40.53 0.0558
2016-11-15 2016-09-30 13F DIAMONDBACK ENERGY INC COM COM 25278X109 3,500 0 0.00 338 5.96 0.0440
2016-08-09 2016-06-30 13F DIAMONDBACK ENERGY INC COM COM 25278X109 3,500 3,500 319 0.0465
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.