ERX 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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| CHK | Expand Energy Corp. | 2025-04-30 | Added / first present |
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| TPL | Texas Pacific Land Corporation | 2025-01-31 | Added / first present |
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| EQT | EQT Corporation | 2022-10-31 | Added / first present |
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| TRGP | TARGA RESOURCES CORP | 2022-10-31 | Added / first present |
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| CTRA | Coterra Energy Inc | 2021-10-31 | Added / first present |
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| N/A | N/A | 2021-07-31 | Added / first present |
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| OXY/WS-W | Occidental Petroleum Corporation | 2020-07-31 | Added / first present |
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| DGCXX | Dreyfus Govt Cash | 2020-04-30 | Added / first present |
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Removals
| Ticker | Issuer | Observed date | Change |
|---|
| N/A | N/A | 2023-01-31 | Removed / first absent |
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| OXY/WS-W | Occidental Petroleum Corporation | 2020-10-31 | Removed / first absent |
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| DGCXX | Dreyfus Govt Cash | 2020-07-31 | Removed / first absent |
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| DREYFUS GOVERNMENT CASH MANAGEMENT | DREYFUS GOVERNMENT CASH MANAGEMENT | 2020-04-30 | Removed / first absent |
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| PXD | Pioneer Natural Resources Company | 2024-07-31 | Removed / first absent |
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| HFC | HollyFrontier Corporation | 2021-07-31 | Removed / first absent |
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| COG | Cabot Oil & Gas Co | 2021-10-31 | Removed / first absent |
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| HES | Hess Corporation | 2025-07-31 | Removed / first absent |
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| CXO | Concho Resources Inc. | 2021-01-31 | Removed / first absent |
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| MRO | Marathon Oil Corporation | 2025-01-31 | Removed / first absent |
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| NBL | Noble Energy, Inc. | 2020-10-31 | Removed / first absent |
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| XEC | Cimarex Energy Corporation | 2020-04-30 | Removed / first absent |
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| FTI | TechnipFMC plc | 2021-04-30 | Removed / first absent |
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| HP | Helmerich & Payne Inc | 2020-07-31 | Removed / first absent |
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| NOV | National Oilwell Varco Incorporation | 2021-10-31 | Removed / first absent |
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