IEO 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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| SANDRIDGE ENERGY, INC. | SANDRIDGE ENERGY, INC. | 2026-03-31 | Added / first present |
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| 1XAEM26 | XAE ENERGY JUN26 | 2026-03-31 | Added / first present |
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| BKV CORPORATION | BKV CORPORATION | 2025-12-31 | Added / first present |
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| 1XAEH26 | XAE ENERGY MAR26 | 2025-12-31 | Added / first present |
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| VIPER ENERGY, INC. | VIPER ENERGY, INC. | 2025-09-30 | Added / first present |
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| 1XAEZ25 | XAE ENERGY DEC25 | 2025-09-30 | Added / first present |
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| VENTURE GLOBAL, INC. | VENTURE GLOBAL, INC. | 2025-06-30 | Added / first present |
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| 1XAEU25 | XAE ENERGY SEP25 | 2025-06-30 | Added / first present |
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| 1XAEM25 | XAE ENERGY JUN25 | 2025-03-31 | Added / first present |
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| VAALCO ENERGY, INC. | VAALCO ENERGY, INC. | 2024-12-31 | Added / first present |
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| Vitesse Energy Inc | Vitesse Energy Inc | 2024-12-31 | Added / first present |
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| CALUMET, INC. | CALUMET, INC. | 2024-12-31 | Added / first present |
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| 1XAEH25 | XAE ENERGY MAR25 | 2024-12-31 | Added / first present |
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| SABLE OFFSHORE CORP. | SABLE OFFSHORE CORP. | 2024-09-30 | Added / first present |
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| 1XAEZ24 | XAE ENERGY DEC24 | 2024-09-30 | Added / first present |
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| Viper Energy, Inc. | Viper Energy, Inc. | 2024-06-30 | Added / first present |
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| 1XAEU24 | XAE ENERGY SEP24 | 2024-06-30 | Added / first present |
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| 1XAEM24 | XAE ENERGY JUN24 | 2024-03-31 | Added / first present |
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| REX AMERICAN RESOURCES CORPORATION | REX AMERICAN RESOURCES CORPORATION | 2023-12-31 | Added / first present |
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| CRESCENT ENERGY COMPANY | CRESCENT ENERGY COMPANY | 2023-12-31 | Added / first present |
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| SITIO ROYALTIES CORP. | SITIO ROYALTIES CORP. | 2023-12-31 | Added / first present |
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| IXPH4 | XAE ENERGY MAR24 | 2023-12-31 | Added / first present |
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| GREEN PLAINS INC. | GREEN PLAINS INC. | 2023-09-30 | Added / first present |
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| IXPZ3 | XAE ENERGY DEC23 | 2023-09-30 | Added / first present |
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| BlackRock Funds III: BlackRock Cash Funds: Treasury; SL Agency Shares | BlackRock Funds III: BlackRock Cash Funds: Treasury; SL Agency Shares | 2023-06-30 | Added / first present |
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| Vitesse Energy Inc | Vitesse Energy Inc | 2023-06-30 | Added / first present |
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| IXPU3 | XAE ENERGY SEP23 | 2023-06-30 | Added / first present |
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| IXPM3 | XAE ENERGY JUN23 | 2023-03-31 | Added / first present |
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| EARTHSTONE ENERGY, INC. | EARTHSTONE ENERGY, INC. | 2022-12-31 | Added / first present |
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| IXPH3 | XAE ENERGY MAR23 | 2022-12-31 | Added / first present |
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| BlackRock Funds III: BlackRock Cash Funds: Treasury; SL Agency Shares | BlackRock Funds III: BlackRock Cash Funds: Treasury; SL Agency Shares | 2022-09-30 | Added / first present |
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| PERMIAN RESOURCES CORPORATION | PERMIAN RESOURCES CORPORATION | 2022-09-30 | Added / first present |
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| IXPZ2 | XAE Energy | 2022-09-30 | Added / first present |
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| Archaea Energy Inc | Archaea Energy Inc | 2022-03-31 | Added / first present |
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| HIPPO PARENT CORP | HIPPO PARENT CORP | 2022-03-31 | Added / first present |
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| California Resources Corp | California Resources Corp | 2021-12-31 | Added / first present |
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| Chesapeake Energy Corp | Chesapeake Energy Corp | 2021-12-31 | Added / first present |
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| Gulfport Energy Corp | Gulfport Energy Corp | 2021-12-31 | Added / first present |
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| Civitas Resources Inc | Civitas Resources Inc | 2021-12-31 | Added / first present |
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| Talos Energy Inc | Talos Energy Inc | 2021-09-30 | Added / first present |
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| Comstock Resources Inc | Comstock Resources Inc | 2021-09-30 | Added / first present |
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| Laredo Petroleum Inc | Laredo Petroleum Inc | 2021-06-30 | Added / first present |
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| Texas Pacific Land Corp | Texas Pacific Land Corp | 2021-06-30 | Added / first present |
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| Oasis Petroleum Inc | Oasis Petroleum Inc | 2021-06-30 | Added / first present |
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| Centennial Resource Development Inc/DE | Centennial Resource Development Inc/DE | 2021-03-31 | Added / first present |
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| Tellurian Inc | Tellurian Inc | 2021-03-31 | Added / first present |
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| Brigham Minerals Inc | Brigham Minerals Inc | 2021-03-31 | Added / first present |
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| Denbury Inc | Denbury Inc | 2021-03-31 | Added / first present |
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| Whiting Petroleum Corp | Whiting Petroleum Corp | 2021-03-31 | Added / first present |
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| Northern Oil and Gas Inc | Northern Oil and Gas Inc | 2021-03-31 | Added / first present |
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| APA Corp | APA Corp | 2021-03-31 | Added / first present |
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| Clean Energy Fuels Corp | Clean Energy Fuels Corp | 2020-12-31 | Added / first present |
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| New Fortress Energy Inc | New Fortress Energy Inc | 2020-12-31 | Added / first present |
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| Ovintiv Inc | Ovintiv Inc | 2020-09-30 | Added / first present |
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| Callon Petroleum Co | Callon Petroleum Co | 2020-09-30 | Added / first present |
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Removals
| Ticker | Issuer | Observed date | Change |
|---|
| 1XAEH26 | XAE ENERGY MAR26 | 2026-03-31 | Removed / first absent |
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| 1XAEZ25 | XAE ENERGY DEC25 | 2025-12-31 | Removed / first absent |
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| 1XAEU25 | XAE ENERGY SEP25 | 2025-09-30 | Removed / first absent |
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| 1XAEM25 | XAE ENERGY JUN25 | 2025-06-30 | Removed / first absent |
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| 1XAEH25 | XAE ENERGY MAR25 | 2025-03-31 | Removed / first absent |
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| 1XAEZ24 | XAE ENERGY DEC24 | 2024-12-31 | Removed / first absent |
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| Viper Energy, Inc. | Viper Energy, Inc. | 2025-09-30 | Removed / first absent |
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| 1XAEU24 | XAE ENERGY SEP24 | 2024-09-30 | Removed / first absent |
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| 1XAEM24 | XAE ENERGY JUN24 | 2024-06-30 | Removed / first absent |
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| SITIO ROYALTIES CORP. | SITIO ROYALTIES CORP. | 2025-09-30 | Removed / first absent |
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| IXPH4 | XAE ENERGY MAR24 | 2024-03-31 | Removed / first absent |
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| IXPZ3 | XAE ENERGY DEC23 | 2023-12-31 | Removed / first absent |
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| Vitesse Energy Inc | Vitesse Energy Inc | 2023-09-30 | Removed / first absent |
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| IXPU3 | XAE ENERGY SEP23 | 2023-09-30 | Removed / first absent |
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| IXPM3 | XAE ENERGY JUN23 | 2023-06-30 | Removed / first absent |
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| EARTHSTONE ENERGY, INC. | EARTHSTONE ENERGY, INC. | 2023-12-31 | Removed / first absent |
|---|
| IXPH3 | XAE ENERGY MAR23 | 2023-03-31 | Removed / first absent |
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| BlackRock Funds III: BlackRock Cash Funds: Treasury; SL Agency Shares | BlackRock Funds III: BlackRock Cash Funds: Treasury; SL Agency Shares | 2022-12-31 | Removed / first absent |
|---|
| IXPZ2 | XAE Energy | 2022-12-31 | Removed / first absent |
|---|
| Archaea Energy Inc | Archaea Energy Inc | 2022-12-31 | Removed / first absent |
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| Civitas Resources Inc | Civitas Resources Inc | 2026-03-31 | Removed / first absent |
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| Laredo Petroleum Inc | Laredo Petroleum Inc | 2025-12-31 | Removed / first absent |
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| Centennial Resource Development Inc/DE | Centennial Resource Development Inc/DE | 2022-09-30 | Removed / first absent |
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| Tellurian Inc | Tellurian Inc | 2024-12-31 | Removed / first absent |
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| Brigham Minerals Inc | Brigham Minerals Inc | 2022-12-31 | Removed / first absent |
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| Denbury Inc | Denbury Inc | 2023-12-31 | Removed / first absent |
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| Whiting Petroleum Corp | Whiting Petroleum Corp | 2022-09-30 | Removed / first absent |
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| New Fortress Energy Inc | New Fortress Energy Inc | 2021-12-31 | Removed / first absent |
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| Callon Petroleum Co | Callon Petroleum Co | 2024-06-30 | Removed / first absent |
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| Chicago Mercantile Exchange | Chicago Mercantile Exchange | 2022-09-30 | Removed / first absent |
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| BlackRock Funds III | BlackRock Funds III | 2022-06-30 | Removed / first absent |
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| Southwestern Energy Co | Southwestern Energy Co | 2024-12-31 | Removed / first absent |
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| HollyFrontier Corp | HollyFrontier Corp | 2022-03-31 | Removed / first absent |
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| Hess Corp | Hess Corp | 2025-09-30 | Removed / first absent |
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| Cheniere Energy Inc | Cheniere Energy Inc | 2023-09-30 | Removed / first absent |
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| Pioneer Natural Resources Co | Pioneer Natural Resources Co | 2024-06-30 | Removed / first absent |
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| Targa Resources Corp | Targa Resources Corp | 2023-09-30 | Removed / first absent |
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| Concho Resources Inc | Concho Resources Inc | 2021-03-31 | Removed / first absent |
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| Marathon Oil Corp | Marathon Oil Corp | 2024-12-31 | Removed / first absent |
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| Noble Energy Inc | Noble Energy Inc | 2020-12-31 | Removed / first absent |
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| Apache Corp | Apache Corp | 2021-03-31 | Removed / first absent |
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| Cimarex Energy Co | Cimarex Energy Co | 2021-12-31 | Removed / first absent |
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| Parsley Energy Inc | Parsley Energy Inc | 2021-03-31 | Removed / first absent |
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| WPX Energy Inc | WPX Energy Inc | 2021-03-31 | Removed / first absent |
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| Continental Resources Inc/OK | Continental Resources Inc/OK | 2022-12-31 | Removed / first absent |
|---|
| Chesapeake Energy Corp | Chesapeake Energy Corp | 2020-06-30 | Removed / first absent |
|---|
| Centennial Resource Development Inc/DE | Centennial Resource Development Inc/DE | 2020-06-30 | Removed / first absent |
|---|
| Talos Energy Inc | Talos Energy Inc | 2020-09-30 | Removed / first absent |
|---|
| PDC Energy Inc | PDC Energy Inc | 2023-09-30 | Removed / first absent |
|---|
| Callon Petroleum Co | Callon Petroleum Co | 2020-09-30 | Removed / first absent |
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| QEP Resources Inc | QEP Resources Inc | 2020-06-30 | Removed / first absent |
|---|
| SRC Energy Inc | SRC Energy Inc | 2020-03-31 | Removed / first absent |
|---|
| Oasis Petroleum Inc | Oasis Petroleum Inc | 2020-06-30 | Removed / first absent |
|---|
| Whiting Petroleum Corp | Whiting Petroleum Corp | 2020-06-30 | Removed / first absent |
|---|
| Gulfport Energy Corp | Gulfport Energy Corp | 2020-06-30 | Removed / first absent |
|---|
| Carrizo Oil & Gas Inc | Carrizo Oil & Gas Inc | 2019-12-31 | Removed / first absent |
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| Denbury Resources Inc | Denbury Resources Inc | 2020-06-30 | Removed / first absent |
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| Laredo Petroleum Inc | Laredo Petroleum Inc | 2020-06-30 | Removed / first absent |
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| Jagged Peak Energy Inc | Jagged Peak Energy Inc | 2020-03-31 | Removed / first absent |
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| Bonanza Creek Energy Inc | Bonanza Creek Energy Inc | 2021-12-31 | Removed / first absent |
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| Penn Virginia Corp | Penn Virginia Corp | 2020-06-30 | Removed / first absent |
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| W&T Offshore Inc | W&T Offshore Inc | 2020-06-30 | Removed / first absent |
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| Tellurian Inc | Tellurian Inc | 2020-06-30 | Removed / first absent |
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| Northern Oil and Gas Inc | Northern Oil and Gas Inc | 2020-06-30 | Removed / first absent |
|---|
| California Resources Corp | California Resources Corp | 2020-06-30 | Removed / first absent |
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| Extraction Oil & Gas Inc | Extraction Oil & Gas Inc | 2019-12-31 | Removed / first absent |
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