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3,340 transactions indexedPioneer Natural Resources acquired by ExxonMobilAnadarko + Occidental closed 2019Marathon Oil acquired by ConocoPhillipsChevron + Hess pendingFree archive · no account required
ARCHIVE
BY OGLANDMAN
3,340 ROWS
DAILY REFRESH
PUBLIC RECORD + EDGAR
1900s → 2026
↓ CHAINS BELOW
WILDCATTER → SUPER-MAJOR
TRANSACTIONS· ARCHIVE

Every chain in
the industry.

3,340 TRANSACTIONS·UPDATED DAILY·FREE · NO ACCOUNT

From Texas wildcatters to Permian super-majors. Trace any operator back to patent. Used by landmen, title researchers, and PE teams.

§ Frequently Looked Up

§ 02 — THE CHAINS · LONGEST LINEAGE WALKS

Five long chains that show the depth of the index. Each arrow is a recorded acquisition or merger. Click any node to open its brief.

  1. From PENNZOIL-QUAKER STATE COMPANY
  2. From TEXACO INC.
  3. From ATLANTIC RICHFIELD COMPANY
  4. From AMOCO PRODUCTION COMPANY
  5. From MOBIL OIL CORPORATION
§ 03 — TODAY IN M&A
  1. 01Concho Resources Inc.ConocoPhillips
  2. 02Equitrans Midstream CorporationEQT Corporation
  3. 03XCL Resources, LLCSM Energy Company
  4. 04Enerplus CorporationChord Energy Corporation
  5. 05Anadarko Petroleum CorporationOccidental Petroleum Corporation
  6. 06Marathon Oil CorporationConocoPhillips
  7. 07Franklin Mountain EnergyPermian Resources
  8. 08Point Energy PartnersDiamondback Energy
  9. 09Rosetta ResourcesNoble Energy
  10. 10El Paso CorporationKinder Morgan
§ 04 — BROWSE THE ARCHIVE

The directory. Every company in alphabetical order.

Showing top entries per letter. Use the search above for the full index — 3,324 companies total, with lineage tracing on every page.

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

§ 05 — SOURCES

Sources

  1. OGLandman M&A Directory — internal archive maintained since 2024. 3,340 entries indexed.
  2. Lineage tracing handles cycles, dissolutions, and same-entity metadata via canonicalized name matching.
  3. Free for chain-of-title research. Attribution requested when cited in published research.