OIH additions & removals
Changes are observation-bounded: an addition is the first retained official snapshot containing a security after an earlier absence; a removal is its first retained absence. Baseline holdings receive no invented addition date.
Additions
| Ticker | Issuer | Observed date | Change |
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| Solaris Energy Infrastructure Inc | Solaris Energy Infrastructure Inc | 2025-09-30 | Added / first present |
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| State Street Global Advisors | State Street Global Advisors | 2025-06-30 | Added / first present |
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| State Street Global Advisors | State Street Global Advisors | 2024-12-31 | Added / first present |
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| Tidewater Inc | Tidewater Inc | 2024-09-30 | Added / first present |
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| Innovex International Inc | Innovex International Inc | 2024-09-30 | Added / first present |
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| Schlumberger NV | Schlumberger NV | 2023-06-30 | Added / first present |
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| Core Laboratories Inc | Core Laboratories Inc | 2023-06-30 | Added / first present |
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| State Street Global Advisors | State Street Global Advisors | 2022-06-30 | Added / first present |
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| Schlumberger NV | Schlumberger NV | 2022-03-31 | Added / first present |
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| NOV Inc | NOV Inc | 2021-03-31 | Added / first present |
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| Select Energy Services Inc | Select Energy Services Inc | 2020-09-30 | Added / first present |
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| Liberty Oilfield Services Inc | Liberty Oilfield Services Inc | 2020-09-30 | Added / first present |
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| ChampionX Corp | ChampionX Corp | 2020-06-30 | Added / first present |
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| DMC Global Inc | DMC Global Inc | 2020-03-31 | Added / first present |
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| National Oilwell Varco Inc | National Oilwell Varco Inc | 2019-12-31 | Added / first present |
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| Halliburton Co | Halliburton Co | 2019-12-31 | Added / first present |
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| Baker Hughes Co | Baker Hughes Co | 2019-12-31 | Added / first present |
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| Helmerich & Payne Inc | Helmerich & Payne Inc | 2019-12-31 | Added / first present |
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| State Street Global Advisors | State Street Global Advisors | 2019-12-31 | Added / first present |
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| Tenaris SA | Tenaris SA | 2019-12-31 | Added / first present |
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| Patterson-UTI Energy Inc | Patterson-UTI Energy Inc | 2019-12-31 | Added / first present |
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| Apergy Corp | Apergy Corp | 2019-12-31 | Added / first present |
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| Dril-Quip Inc | Dril-Quip Inc | 2019-12-31 | Added / first present |
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| Oceaneering International Inc | Oceaneering International Inc | 2019-12-31 | Added / first present |
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| Cactus Inc | Cactus Inc | 2019-12-31 | Added / first present |
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| Helix Energy Solutions Group Inc | Helix Energy Solutions Group Inc | 2019-12-31 | Added / first present |
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| ProPetro Holding Corp | ProPetro Holding Corp | 2019-12-31 | Added / first present |
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| US Silica Holdings Inc | US Silica Holdings Inc | 2019-12-31 | Added / first present |
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| Oil States International Inc | Oil States International Inc | 2019-12-31 | Added / first present |
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| Diamond Offshore Drilling Inc | Diamond Offshore Drilling Inc | 2019-12-31 | Added / first present |
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| RPC Inc | RPC Inc | 2019-12-31 | Added / first present |
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| NexTier Oilfield Solutions Inc | NexTier Oilfield Solutions Inc | 2019-12-31 | Added / first present |
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Removals
| Ticker | Issuer | Observed date | Change |
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| State Street Global Advisors | State Street Global Advisors | 2025-03-31 | Removed / first absent |
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| State Street Global Advisors | State Street Global Advisors | 2023-12-31 | Removed / first absent |
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| Schlumberger NV | Schlumberger NV | 2022-12-31 | Removed / first absent |
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| ChampionX Corp | ChampionX Corp | 2025-09-30 | Removed / first absent |
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| DMC Global Inc | DMC Global Inc | 2022-09-30 | Removed / first absent |
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| National Oilwell Varco Inc | National Oilwell Varco Inc | 2021-03-31 | Removed / first absent |
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| State Street Global Advisors | State Street Global Advisors | 2022-03-31 | Removed / first absent |
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| Apergy Corp | Apergy Corp | 2020-06-30 | Removed / first absent |
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| Dril-Quip Inc | Dril-Quip Inc | 2024-09-30 | Removed / first absent |
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| US Silica Holdings Inc | US Silica Holdings Inc | 2024-09-30 | Removed / first absent |
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| Oil States International Inc | Oil States International Inc | 2023-03-31 | Removed / first absent |
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| Diamond Offshore Drilling Inc | Diamond Offshore Drilling Inc | 2020-06-30 | Removed / first absent |
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| NexTier Oilfield Solutions Inc | NexTier Oilfield Solutions Inc | 2023-09-30 | Removed / first absent |
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| DO | DIAMOND OFFSHORE DRILLING INC | 2019-12-31 | Removed / first absent |
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| MDR | MCDERMOTT INTERNATIONAL INC | 2019-12-31 | Removed / first absent |
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| BHGE | BAKER HUGHES A GE CO | 2019-12-31 | Removed / first absent |
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| SLCA | US SILICA HOLDINGS INC | 2019-12-31 | Removed / first absent |
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| APY | Apergy Corp | 2019-12-31 | Removed / first absent |
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| CJ | C&J ENERGY SERVICES INC | 2019-12-31 | Removed / first absent |
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| DRQ | DRIL-QUIP INC | 2019-12-31 | Removed / first absent |
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| CLB | CORE LABORATORIES NV | 2019-12-31 | Removed / first absent |
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| FTI | TECHNIPFMC PLC | 2019-12-31 | Removed / first absent |
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| HAL | HALLIBURTON CO | 2019-12-31 | Removed / first absent |
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| HLX | Helix Energy Solutions Group I | 2019-12-31 | Removed / first absent |
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| HP | HELMERICH & PAYNE INC | 2019-12-31 | Removed / first absent |
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| NBR | NABORS INDUSTRIES LTD | 2019-12-31 | Removed / first absent |
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| NE | NOBLE CORP PLC | 2019-12-31 | Removed / first absent |
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| NOV | NATIONAL OILWELL VARCO INC | 2019-12-31 | Removed / first absent |
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| OII | OCEANEERING INTERNATIONAL INC | 2019-12-31 | Removed / first absent |
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| OIS | OIL STATES INTERNATIONAL INC | 2019-12-31 | Removed / first absent |
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| PTEN | PATTERSON-UTI ENERGY INC | 2019-12-31 | Removed / first absent |
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| PUMP | ProPetro Holding Corp | 2019-12-31 | Removed / first absent |
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| RES | RPC INC | 2019-12-31 | Removed / first absent |
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| RIG | TRANSOCEAN LTD | 2019-12-31 | Removed / first absent |
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| SLB | SCHLUMBERGER LTD | 2019-12-31 | Removed / first absent |
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| TS | TENARIS SA | 2019-12-31 | Removed / first absent |
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| VAL | Valaris plc | 2019-12-31 | Removed / first absent |
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| WHD | Cactus Inc | 2019-12-31 | Removed / first absent |
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