| 61301 | ISG/DCE | Cuyahoga County, OH | Oil & Gas Property | Dec 2025 |
| 61302 | ISGAR A#4 | La Plata County, CO | Gas Property | May 2026 |
| 61303 | ISHAM | Jim Wells County, TX | Oil & Gas Property | May 2026 |
| 61304 | ISHAM | Texas County, OK | Gas Property | Jun 2026 |
| 61305 | ISHIBASHI | Orange County, CA | Oil & Gas Property | Jul 1989 |
| 61306 | ISHIGURO | Weld County, CO | Oil & Gas Property | May 2026 |
| 61307 | ISHMAN | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 61308 | ISIDRO MORENO ET AL | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 61309 | ISLAND | Seminole County, OK | Oil & Gas Property | Jun 2026 |
| 61310 | ISLAND BUTTE | Montezuma County, CO | Oil & Gas Property | May 2026 |
| 61311 | ISLAND CREEK | Lincoln County, WV | Oil & Gas Property | Dec 2021 |
| 61312 | ISLAND CREEK | Mingo County, WV | Gas Property | Dec 2021 |
| 61313 | ISLAND CREEK CO | Hopkins County, KY | Oil & Gas Property | Jan 2024 |
| 61314 | ISLAND CREEK CO | Logan County, WV | Oil & Gas Property | Dec 2021 |
| 61315 | ISLAND CREEK COAL | Upshur County, WV | Oil & Gas Property | Dec 2021 |
| 61316 | ISLAND CREEK COAL C | McDowell County, WV | Gas Property | Dec 2021 |
| 61317 | ISLAND CREEK COAL CO | Hopkins County, KY | Oil & Gas Property | Dec 2014 |
| 61318 | ISLAND LAKE 6092 12-24H | Burke County, ND | Oil & Gas Property | Jun 2026 |
| 61319 | ISLAND PARK B | Garfield County, CO | Oil & Gas Property | Jan 2026 |
| 61320 | ISLAND RANCH | Garfield County, CO | Oil & Gas Property | May 2026 |
| 61321 | ISLAND U | Uintah County, UT | Oil & Gas Property | Dec 2015 |
| 61322 | ISLAND U | Uintah County, UT | Oil & Gas Property | Jun 2026 |
| 61323 | ISLAND UNIT | Uintah County, UT | Oil & Gas Property | Jun 2026 |
| 61324 | ISLE | Montgomery County, KS | Gas Property | May 2026 |
| 61325 | ISLE ROYAL 148-95-02A-11H-TF-LL | Dunn County, ND | Oil & Gas Property | Jun 2026 |
| 61326 | ISLE ROYALE 20-5 | Dawson County, TX | Oil & Gas Property | Jun 2026 |
| 61327 | ISLER FE | Chaves County, NM | Gas Property | Jun 2026 |
| 61328 | ISLER FEDERAL | Chaves County, NM | Oil & Gas Property | Jun 2017 |
| 61329 | ISLER PENNZOIL FEDERAL | Chaves County, NM | Gas Property | Apr 2020 |
| 61330 | ISLES LANE | Caddo Parish, LA | Oil Property | Nov 2024 |
| 61331 | ISLEY | Okmulgee County, OK | Gas Property | Jan 2013 |
| 61332 | ISLEY I | Gregg County, TX | Oil & Gas Property | Jun 2026 |
| 61333 | ISMAY FLODINE | San Juan County, UT | Oil & Gas Property | Jul 2026 |
| 61334 | ISMERT 2 | Reno County, KS | Oil & Gas Property | May 2026 |
| 61335 | ISOM | Texas County, OK | Oil & Gas Property | Jun 2026 |
| 61336 | ISOM | Stevens County, KS | Gas Property | Mar 2026 |
| 61337 | ISON | Elliott County, KY | Oil Property | Dec 2023 |
| 61338 | ISON, ANDERSON | Elliott County, KY | Oil & Gas Property | Dec 2015 |
| 61339 | ISON, CALLIE | Letcher County, KY | Oil & Gas Property | Dec 2024 |
| 61340 | ISON, JAMES D | Letcher County, KY | Gas Property | Dec 2019 |
| 61341 | ISON, JEFFERSON | Letcher County, KY | Gas Property | Dec 2024 |
| 61342 | ISON, JESSE | Letcher County, KY | Oil & Gas Property | Dec 2024 |
| 61343 | ISON, MOSES 7 | Letcher County, KY | Gas Property | Dec 2024 |
| 61344 | ISON, O D | Elliott County, KY | Oil & Gas Property | Dec 2019 |
| 61345 | ISON, TIVIS & REEDA | Elliott County, KY | Oil & Gas Property | Sep 2024 |
| 61346 | ISRAEL | Ford County, KS | Oil Property | May 2026 |
| 61347 | ISRAEL | Wise County, TX | Oil & Gas Property | Jun 2026 |
| 61348 | ISRAEL | Morton County, KS | Oil & Gas Property | May 2026 |
| 61349 | ISRAEL BARNETT | Jefferson County, OK | Oil Property | Jul 2026 |
| 61350 | ISRAEL GAS UNIT | Stanton County, KS | Gas Property | May 2026 |
| 61351 | ISSLER | Chautauqua County, NY | Gas Property | Dec 2025 |
| 61352 | ISZLEY-USA | McKenzie County, ND | Oil & Gas Property | Jun 2026 |
| 61353 | ITALIAN STALLION | Fayette County, TX | Oil & Gas Property | Apr 2026 |
| 61354 | ITCH STATE | Lea County, NM | Oil & Gas Property | Jun 2026 |
| 61355 | ITHACA 15 14 | Eddy County, NM | Oil & Gas Property | Jun 2026 |
| 61356 | ITHACA 42 | Glasscock County, TX | Oil & Gas Property | Jun 2026 |
| 61357 | ITTNER | Cheyenne County, NE | Oil Property | Dec 2025 |
| 61358 | IVA #1-19 | McClain County, OK | Oil & Gas Property | Jul 2026 |
| 61359 | IVA 1-6H | Williams County, ND | Oil & Gas Property | Jun 2026 |
| 61360 | IVA JO | Caddo County, OK | Oil & Gas Property | Jul 2026 |
| 61361 | IVA THOMSON | Clearfield County, PA | Gas Property | Dec 2025 |
| 61362 | IVAN | McKenzie County, ND | Oil & Gas Property | Jun 2026 |
| 61363 | IVAN AND ALBERT CHRISTENSON | Bottineau County, ND | Oil & Gas Property | Jun 2026 |
| 61364 | IVAN C FETTERMAN | Indiana County, PA | Gas Property | Dec 2025 |
| 61365 | IVAN CS FED | Campbell County, WY | Gas Property | Aug 2018 |
| 61366 | IVAN FAIL | Wilson County, KS | Gas Property | May 2026 |
| 61367 | IVAN GEHRINGER | Bottineau County, ND | Oil Property | Jun 2026 |
| 61368 | IVAN HECKER USA 41-6H | Dunn County, ND | Oil & Gas Property | Jun 2026 |
| 61369 | IVAN RIVER UNIT | Tyonek Quadrangle, AK | Gas Property | Feb 2026 |
| 61370 | IVAN W LEAMER | Clearfield County, PA | Gas Property | Dec 2025 |
| 61371 | IVAR THE BONELESS FEDERAL | Lea County, NM | Oil & Gas Property | Jun 2026 |
| 61372 | IVAS SMITH 0 | Live Oak County, TX | Oil & Gas Property | Jun 2026 |
| 61373 | IVEN | Kingfisher County, OK | Oil & Gas Property | Jun 2026 |
| 61374 | IVENS | Sherman County, TX | Gas Property | Jun 2026 |
| 61375 | IVENS | Sherman County, TX | Oil & Gas Property | Jun 2026 |
| 61376 | IVER & MINNIE | Stark County, ND | Oil & Gas Property | Jun 2026 |
| 61377 | IVER GRAVSETH | Bottineau County, ND | Oil Property | Sep 1960 |
| 61378 | IVERS | La Plata County, CO | Gas Property | May 2026 |
| 61379 | IVERSEN | Richland County, MT | Oil & Gas Property | Jun 2026 |
| 61380 | IVERSON | Richland County, MT | Oil & Gas Property | Jun 2026 |
| 61381 | IVERSON | Liberty County, MT | Oil & Gas Property | Apr 2026 |
| 61382 | IVERSON | Mountrail County, ND | Oil & Gas Property | Jun 2026 |
| 61383 | IVERSON | Roosevelt County, MT | Oil & Gas Property | Jun 2026 |
| 61384 | IVERSON | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 61385 | IVERSON | Richland County, MT | Oil & Gas Property | Feb 2026 |
| 61386 | IVERSON | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 61387 | IVERSON | McKenzie County, ND | Oil & Gas Property | Jun 2026 |
| 61388 | IVERSON | Pondera County, MT | Gas Property | Oct 2024 |
| 61389 | IVERSON 14-11H | Williams County, ND | Oil & Gas Property | Jun 2026 |
| 61390 | IVERSON 17 | Martin County, TX | Oil & Gas Property | Apr 2026 |
| 61391 | IVERSON USA 14-26TFH | McKenzie County, ND | Oil & Gas Property | Jun 2026 |
| 61392 | IVERSON-COWDEN | Winkler County, TX | Oil & Gas Property | Mar 2009 |
| 61393 | IVES | Seward County, KS | Gas Property | May 2026 |
| 61394 | IVESTOR | Wheeler County, TX | Oil & Gas Property | Jun 2026 |
| 61395 | IVEY | Eddy County, NM | Oil & Gas Property | Apr 2026 |
| 61396 | IVEY | Jack County, TX | Oil & Gas Property | Jun 2026 |
| 61397 | IVEY | Pittsburg County, OK | Gas Property | Jun 2026 |
| 61398 | IVEY | Adams County, CO | Oil & Gas Property | May 2026 |
| 61399 | IVEY | Hockley County, TX | Oil & Gas Property | Jun 2026 |
| 61400 | IVEY | Hockley County, TX | Oil & Gas Property | Jun 2026 |