ProPetro Holding Corp.
US ˙ NYSE ˙ US74347M1080

SecurityPUMP / ProPetro Holding Corp.
InstitutionRBF Capital, LLC
Latest Disclosed Ownership140,000 shares
Latest Disclosed Value $ 2,017,400
RBF Capital, LLC reports 3.58% decrease in ownership of PUMP / ProPetro Holding Corp.

On May 18, 2026 - RBF Capital, LLC filed a 13F-HR/A form disclosing ownership of 140,000 shares of ProPetro Holding Corp. (US:PUMP) valued at $2,017,400 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 17, 2026 disclosing 145,200 shares of ProPetro Holding Corp.. This represents a change in shares of -3.58% during the quarter. The current value of the position is $2,287,600 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)
2026-05-18 2026-03-31 13F/A-1 PROPETRO HLDG COM 74347M108 140,000 -5,200 -3.58 2,017 46.16 0.0986
2026-05-14 2026-03-31 13F PROPETRO HLDG COM 74347M108 140,000 -5,200 2,017 0.1055
2026-02-17 2025-12-31 13F/A-1 PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,381 81.58 0.0613
2026-02-17 2025-12-31 13F PROPETRO HLDG COM 74347M108 145,200 0 1,381 0.0613
2025-11-14 2025-09-30 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 761 -12.24 0.0339
2025-08-14 2025-06-30 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 867 -18.84 0.0412
2025-05-15 2025-03-31 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,067 -21.20 0.0641
2025-02-14 2024-12-31 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,355 21.76 0.0701
2024-11-14 2024-09-30 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,112 -11.61 0.0557
2024-08-14 2024-06-30 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,259 7.25 0.0723
2024-05-15 2024-03-31 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,173 -3.54 0.0656
2024-02-14 2023-12-31 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,217 -21.19 0.0736
2023-11-14 2023-09-30 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,543 29.01 0.1014
2023-08-14 2023-06-30 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,196 14.67 0.0746
2023-05-16 2023-03-31 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,044 -30.74 0.0758
2023-02-14 2022-12-31 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,506 28.83 0.1132
2022-11-14 2022-09-30 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,169 -42.21 0.0985
2022-08-15 2022-06-30 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 2,023 0.00 0.1407
2022-05-16 2022-03-31 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 2,023 72.02 0.1293
2022-02-14 2021-12-31 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,176 -6.37 0.0724
2021-11-15 2021-09-30 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,256 -5.56 0.0701
2021-08-16 2021-06-30 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,330 -14.08 0.0743
2021-05-17 2021-03-31 13F PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,548 44.27 0.0965
2021-03-02 2020-12-31 13F/A-1 PROPETRO HLDG COM 74347M108 145,200 0 0.00 1,073 81.86 0.0821
2021-02-11 2020-12-31 13F PROPETRO HLDG COM 74347M108 145,200 0 1,073 93,075.7053
2020-11-16 2020-09-30 13F/A-1 PROPETRO HLDG COM 74347M108 145,200 0 0.00 590 -20.91 0.0595
2020-11-16 2020-09-30 13F PROPETRO HLDG COM 74347M108 135,855 1,412
2020-08-14 2020-06-30 13F PROPETRO HLDG COM 74347M108 145,200 30,000 26.04 746 159.03 0.0804
2020-05-18 2020-03-31 13F PROPETRO HLDG COM 74347M108 115,200 115,200 288 0.0377
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.