パターソン-UTI エナジー社
US ˙ NasdaqGS ˙ US7034811015

SecurityPTEN / Patterson-UTI Energy, Inc.
InstitutionMarshall Wace, Llp
Latest Disclosed Ownership39,441 shares
Latest Disclosed Value $ 427,146
Marshall Wace, Llp reports 84.31% decrease in ownership of PTEN / Patterson-UTI Energy, Inc.

On May 14, 2026 - Marshall Wace, Llp filed a 13F-HR form disclosing ownership of 39,441 shares of Patterson-UTI Energy, Inc. (US:PTEN) valued at $427,146 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 251,350 shares of Patterson-UTI Energy, Inc.. This represents a change in shares of -84.31% during the quarter. The current value of the position is $453,966 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)
2026-05-14 2026-03-31 13F PATTERSON-UTI COMMON STOCK 703481101 39,441 -211,909 -84.31 427 -72.18 0.0002
2026-02-13 2025-12-31 13F PATTERSON-UTI COMMON STOCK 703481101 251,350 -220,137 -46.69 1,536 -37.14 0.0014
2025-11-13 2025-09-30 13F PATTERSON-UTI COMMON STOCK 703481101 471,487 471,487 2,442 0.0025
2025-08-13 2025-06-30 13F PATTERSON-UTI COMMON STOCK 703481101 0 -717,719 -100.00 0 -100.00
2025-05-15 2025-03-31 13F PATTERSON-UTI COMMON STOCK 703481101 717,719 -569,925 -44.26 5,900 -44.53 0.0075
2025-02-13 2024-12-31 13F PATTERSON-UTI COMMON STOCK 703481101 1,287,644 973,799 310.28 10,636 343.13 0.0128
2024-11-14 2024-09-30 13F PATTERSON-UTI COMMON STOCK 703481101 313,845 313,845 2,401 0.0029
2024-05-15 2024-03-31 13F PATTERSON-UTI COMMON STOCK 703481101 0 -97,175 -100.00 0 -100.00
2024-05-15 2024-03-31 13F PATTERSON-UTI COMMON STOCK 703481101 0 0
2024-02-14 2023-12-31 13F PATTERSON-UTI COMMON STOCK 703481101 97,175 97,175 1,049 0.0018
2023-11-14 2023-09-30 13F PATTERSON-UTI COMMON STOCK 703481101 0 -265,920 -100.00 0 -100.00
2023-08-14 2023-06-30 13F PATTERSON-UTI COMMON STOCK 703481101 265,920 123,791 87.10 3,183 91.52 0.0062
2023-05-15 2023-03-31 13F PATTERSON-UTI COMMON STOCK 703481101 142,129 142,129 1,663 0.0035
2023-02-14 2022-12-31 13F PATTERSON-UTI COMMON STOCK 703481101 0 -46,300 -100.00 0 -100.00
2022-11-14 2022-09-30 13F PATTERSON-UTI COMMON STOCK 703481101 46,300 46,300 541 0.0012
2022-05-16 2022-03-31 13F PATTERSON-UTI COMMON STOCK 703481101 0 -62,691 -100.00 0 -100.00
2022-02-14 2021-12-31 13F PATTERSON-UTI COMMON STOCK 703481101 62,691 62,691 530 0.0010
2020-11-16 2020-09-30 13F PATTERSON-UTI COMMON STOCK 703481101 0 -122,900 -100.00 0 -100.00
2020-08-13 2020-06-30 13F PATTERSON-UTI COMMON STOCK 703481101 122,900 -668,878 -84.48 426 -77.10 0.0030
2020-05-15 2020-03-31 13F PATTERSON-UTI COMMON STOCK 703481101 791,778 791,778 1,860 0.0186
2020-02-14 2019-12-31 13F PATTERSON-UTI COMMON STOCK 703481101 0 -1,575,337 -100.00 0 -100.00
2019-11-14 2019-09-30 13F PATTERSON-UTI COMMON STOCK 703481101 1,575,337 1,565,333 15,647.07 13,469 11,612.17 0.1059
2019-08-14 2019-06-30 13F PATTERSON-UTI COMMON STOCK 703481101 10,004 -53,098 -84.15 115 -86.99 0.0009
2019-05-29 2019-03-31 13F/A-1 PATTERSON-UTI COMMON STOCK 703481101 63,102 -440,898 -87.48 884 -83.05 0.0083
2019-05-14 2019-03-31 13F PATTERSON-UTI COMMON STOCK 703481101 63,102 -440,898 884
2019-02-14 2018-12-31 13F PATTERSON-UTI COMMON STOCK 703481101 504,000 -165,770 -24.75 5,216 -54.49 0.0532
2018-12-06 2018-09-30 13F/A-1 PATTERSON-UTI COMMON STOCK 703481101 669,770 630,936 1,624.70 11,460 1,539.48 0.0975
2018-11-14 2018-09-30 13F PATTERSON-UTI COMMON STOCK 703481101 669,770 630,936 11,460
2018-08-14 2018-06-30 13F PATTERSON-UTI COMMON STOCK 703481101 38,834 7,426 23.64 699 27.09 0.0105
2018-05-15 2018-03-31 13F PATTERSON-UTI COMMON STOCK 703481101 31,408 13,105 71.60 550 30.64 0.0228
2018-03-29 2017-12-31 13F/A-1 PATTERSON-UTI COMMON STOCK 703481101 18,303 18,303 421 0.0177
2018-02-14 2017-12-31 13F PATTERSON-UTI COMMON STOCK 703481101 18,303 18,303 421
2017-08-04 2017-06-30 13F PATTERSON-UTI COMMON STOCK 703481101 0 -14,943 -100.00 0 -100.00
2017-05-12 2017-03-31 13F PATTERSON-UTI COMMON STOCK 703481101 14,943 -456,801 -96.83 359 -97.17 0.0173
2017-02-10 2016-12-31 13F PATTERSON-UTI COMMON STOCK 703481101 471,744 471,744 12,699 0.0835
2016-08-12 2016-06-30 13F PATTERSON-UTI COMMON STOCK 703481101 0 -219,756 -100.00 0 -100.00
2016-05-13 2016-03-31 13F PATTERSON-UTI COMMON STOCK 703481101 219,756 56,651 34.73 3,872 57.40 0.0373
2016-02-10 2015-12-31 13F PATTERSON-UTI COMMON STOCK 703481101 163,105 163,105 0.00 2,460 0.0231
2015-02-17 2014-12-31 13F SEVENTY SEVEN COMMON STOCK 818097107 0 -4,572 -100.00 0 -100.00
2014-11-13 2014-09-30 13F SEVENTY SEVEN COMMON STOCK 818097107 4,572 -131,629 -96.64 109 -97.71 0.0016
2014-11-13 2014-09-30 13F PATTERSON-UTI COMMON STOCK 703481101 201,509 196,937 6,555 94,572.9551
2014-08-14 2014-06-30 13F PATTERSON-UTI COMMON STOCK 703481101 136,201 136,201 4,759 0.0701
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.