Largest Oil & Gas E&P Companies by Market Cap

Largest Oil & Gas E&P companies by market cap. The Oil & Gas E&P sector has 406 publicly listed stocks with a combined market cap of $1.24 Trillion. Mesa Royalty Trust leads the sector with a market cap of $3.63 Million. This ranking covers all Oil & Gas E&P stocks globally — from large-cap industry leaders to mid-cap and small-cap companies — ranked by market capitalization and updated daily.

Total Market Cap (USD)

$1.24 Trillion

Companies Listed

406

Largest Company

Mesa Royalty Trust

Top Oil & Gas E&P Stocks by Market Capitalization (October 2026)

Top Oil & Gas E&P stocks by market capitalization as of October 2026, covering 406 publicly listed companies.

Rank Company Market Cap (USD) Market Cap (Local) Country Price 24h Change 7d Change 24h Volume
301 Mesa Royalty Trust
NYSE:MTR 		$3.63 Million $3.63 Million USA $1.95 +2.09% -5.80% 151.94K
302 IPB Petroleum Ltd
AU:IPB 		$3.62 Million AU$5.12 Million Australia AU$0.01 +0.00% +0.00% 54.13 Million
303 Capricorn Energy PLC
LSE:CNE 		$3.57 Million GBX29.32 Billion UK GBX427.00 -0.23% +0.71% 3.18 Million
304 Petrotal Corp
LSE:PTAL 		$3.42 Million GBX28.07 Billion UK GBX30.50 +0.00% -2.24% 4.95 Million
305 PetroFrontier Corp
V:PFC 		$3.38 Million CA$4.67 Million Canada CA$0.02 +0.00% +0.00% 0.00
306 P/F Atlantic Petroleum
CO:ATLA-DKK 		$3.36 Million Dkr21.45 Million Denmark Dkr5.80 +3.20% +3.57% 619.70K
307 Icon Energy Ltd
AU:ICN 		$3.26 Million AU$4.61 Million Australia AU$0.01 +0.00% +0.00% 0.00
308 Kistos PLC
LSE:KIST 		$3.16 Million GBX25.93 Billion UK GBX312.00 +3.65% +3.31% 3.58 Million
309 Canadian Spirit Resources Inc
V:SPI 		$3.13 Million CA$4.32 Million Canada CA$0.02 +0.00% +0.00% 20.32 Million
310 Bounty Oil & Gas NL
AU:BUY 		$3.12 Million AU$4.41 Million Australia AU$0.01 +0.00% -22.22% 74.43 Million
311 Metalore Resources Ltd
V:MET 		$3.08 Million CA$4.26 Million Canada CA$2.40 +0.00% -7.69% 5.05K
312 TOMCO ENERGY POST CON.
F:NI41 		$3.03 Million €2.59 Million Germany €0.00 +0.00% +0.00% 0.00
313 Provaris Energy Ltd
AU:PV1 		$2.95 Million AU$4.17 Million Australia AU$0.00 +0.00% +0.00% 53.53 Million
314 GAS2GRID Ltd
AU:GGX 		$2.88 Million AU$4.08 Million Australia AU$0.00 +0.00% +0.00% 0.00
315 McChip Resources Inc
V:MCS 		$2.80 Million CA$3.87 Million Canada CA$0.65 +0.00% -13.33% 126.06K
316 Xstate Resources Ltd
AU:XST 		$2.73 Million AU$3.86 Million Australia AU$0.01 +0.00% -10.00% 33.92 Million
317 GIVOT OLAM OIL EXP ILS1
TA:GIVO-L 		$2.72 Million ILA1.02 Billion Israel ILA71.40 -1.79% -8.46% 34.70 Million
318 Jadestone Energy Inc
LSE:JSE 		$2.72 Million GBX22.34 Billion UK GBX41.00 -4.65% -4.87% 41.78 Million
319 Mec Resources Ltd
AU:MMR 		$2.65 Million AU$3.74 Million Australia AU$0.00 +0.00% +0.00% 6.96 Million
320 Aminex PLC
STU:DOP 		$2.61 Million €2.23 Million Germany €0.00 +0.00% +0.00% 0.00
321 Sonoro Energy Ltd
V:SNV 		$2.61 Million CA$3.61 Million Canada CA$0.02 +50.00% +50.00% 7.74 Million
322 Galilee Energy Ltd
AU:GLL 		$2.56 Million AU$3.62 Million Australia AU$0.00 +0.00% -33.33% 142.19 Million
323 State GAS Ltd
AU:GAS 		$2.51 Million AU$3.55 Million Australia AU$0.01 +0.00% +0.00% 13.14 Million
324 Jura Energy Corporation
V:JEC 		$2.50 Million CA$3.45 Million Canada CA$0.05 -50.00% -47.37% 174.00K
325 Nexera Energy Inc
V:NGY 		$2.46 Million CA$3.40 Million Canada CA$0.02 +0.00% +0.00% 0.00
326 Afentra PLC
LSE:AET 		$2.37 Million GBX19.48 Billion UK GBX70.80 -1.26% +1.00% 14.61 Million
327 Helios Energy Ltd
AU:HE8 		$2.37 Million AU$3.35 Million Australia AU$0.00 +0.00% -33.33% 103.33K
328 KEY Petroleum Ltd
AU:KEY 		$2.26 Million AU$3.19 Million Australia AU$0.08 +2.50% -5.75% 633.81K
329 Falcon Oil & Gas Ltd.
LSE:FOG 		$2.23 Million GBX18.30 Billion UK GBX16.50 -1.49% -5.71% 2.22 Million
330 Grand Gulf Energy Ltd
AU:GGE 		$2.21 Million AU$3.12 Million Australia AU$0.00 +0.00% +0.00% 110.34 Million
331 UNITED OIL+GAS PLC LS-01
F:1UO 		$2.20 Million €1.88 Million Germany €0.00 +0.00% +0.00% 0.00
332 Centaurus Energy Inc
V:CTA 		$2.10 Million CA$2.90 Million Canada CA$4.81 +0.00% +284.80% 14.18K
333 Surya Oil & Gas Corp.
NASDAQ:SURY 		$2.10 Million $2.10 Million USA $0.00 -2.50% +8.33% 8.29 Million
334 QEM Ltd
AU:QEM 		$2.01 Million AU$2.84 Million Australia AU$0.01 +0.00% +0.00% 23.59 Million
335 EF EnergyFunders Ventures Inc
V:EFV 		$1.98 Million CA$2.74 Million Canada CA$0.01 +0.00% +0.00% 0.00
336 Genel Energy Plc
LSE:GENL 		$1.97 Million GBX16.23 Billion UK GBX58.90 +2.43% +3.15% 5.76 Million
337 Tullow Oil PLC
LSE:TLW 		$1.92 Million GBX15.82 Billion UK GBX10.44 -1.14% -0.95% 759.49 Million
338 Prominence Energy Ltd
AU:PRM 		$1.89 Million AU$2.68 Million Australia AU$0.00 +0.00% -33.33% 63.02 Million
339 Vintage Energy Ltd
AU:VEN 		$1.73 Million AU$2.44 Million Australia AU$0.00 +0.00% +0.00% 18.67 Million
340 Cobra Venture Corp
V:CBV 		$1.68 Million CA$2.32 Million Canada CA$0.14 +0.00% +0.00% 0.00
341 Pantheon Resources
LSE:PANR 		$1.62 Million GBX13.30 Billion UK GBX9.12 -2.88% -4.40% 109.09 Million
342 Triangle Energy (Global) Ltd
AU:TEG 		$1.57 Million AU$2.22 Million Australia AU$0.00 +0.00% +0.00% 0.00
343 Pharos Energy plc
LSE:PHAR 		$1.51 Million GBX12.38 Billion UK GBX30.00 +2.04% +2.39% 22.83 Million
344 WILDCAT PRETR.LS -000028
F:8Y6 		$1.50 Million €1.28 Million Germany €0.00 +0.00% +0.00% 0.00
345 LANSDOWNE OIL+GAS LS-001
F:L2J 		$1.44 Million €1.23 Million Germany €0.00 +0.00% +0.00% 0.00
346 Savannah Energy PLC
LSE:SAVE 		$1.40 Million GBX11.51 Billion UK GBX5.51 +0.00% -11.84% 59.05 Million
347 Modiin Energy-Limited Partnership
TA:MDIN-L 		$1.34 Million ILA498.72 Million Israel ILA239.00 -2.81% -2.01% 6.21 Million
348 Sagalio Energy Ltd
AU:SAN 		$1.23 Million AU$1.74 Million Australia AU$0.01 +0.00% +0.00% 10.00K
349 Winchester Energy Ltd
AU:WEL 		$1.21 Million AU$1.71 Million Australia AU$0.00 +0.00% +0.00% 110.67 Million
350 Labrador Technologies Inc
V:LTX 		$1.20 Million CA$1.67 Million Canada CA$0.14 +0.00% -10.00% 117.23K
351 Chariot Oil & Gas Limited
LSE:CHAR 		$1.14 Million GBX9.40 Billion UK GBX3.28 -1.80% +13.89% 297.55 Million
352 Borders & Southern Petroleum plc
LSE:BOR 		$1.14 Million GBX9.35 Billion UK GBX10.55 -2.31% +1.93% 65.59 Million
353 Altai Resources Inc.
V:ATI 		$1.12 Million CA$1.55 Million Canada CA$0.05 -9.09% +66.67% 14.13 Million
354 Marksmen Energy Inc
V:MAH 		$1.06 Million CA$1.46 Million Canada CA$0.12 -4.17% +0.00% 99.10K
355 Total Helium Ltd
V:TOH 		$1.02 Million CA$1.42 Million Canada CA$0.22 +0.00% +0.00% 19.47K
356 Prominence Energy Limited
F:RSX 		$991.80K €848.34K Germany €0.00 +0.00% +0.00% 0.00
357 Aminex PLC
LSE:AEX 		$978.64K GBX8.04 Billion UK GBX1.80 -5.26% +2.86% 111.08 Million
358 International Frontier Resources Corporation
V:IFR 		$964.26K CA$1.33 Million Canada CA$0.04 +0.00% +0.00% 0.00
359 Tlou Energy Ltd
AU:TOU 		$918.83K AU$1.30 Million Australia AU$0.00 -66.67% -50.00% 11.87 Million
360 Zephyr Energy PLC
LSE:ZPHR 		$805.13K GBX6.62 Billion UK GBX3.15 -1.56% +1.61% 39.68 Million
361 XXL Energy Corp
V:XL 		$734.53K CA$1.02 Million Canada CA$0.14 +0.00% +0.00% 27.03K
362 Strikewell Energy Corp
V:SKK 		$717.66K CA$992.09K Canada CA$0.12 +0.00% -4.17% 7.00K
363 Greencastle Resources Ltd.
V:VGN 		$703.28K CA$972.21K Canada CA$0.02 +0.00% +0.00% 1.54 Million
364 Upland Resources Ltd
LSE:UPL 		$614.46K GBX5.05 Billion UK GBX2.93 +0.00% +2.63% 67.30 Million
365 ProAm Explorations Corp
V:PMX 		$541.31K CA$748.30K Canada CA$0.05 -33.33% -37.50% 3.75 Million
366 Corcel PLC
LSE:CRCL 		$539.22K GBX4.43 Billion UK GBX0.47 +0.00% +4.44% 260.39 Million
367 Star Energy Group Plc
LSE:STAR 		$470.00K GBX3.86 Billion UK GBX20.00 +5.26% -2.44% 2.44 Million
368 Jersey Oil and Gas PLC
LSE:JOG 		$467.03K GBX3.84 Billion UK GBX117.50 -0.84% +0.86% 3.02 Million
369 PETREL RESOURCES (PQ4.SG)
STU:PQ4 		$425.19K €363.69K Germany €0.01 +275.00% +650.00% 3.10K
370 CENTAURUS ENERGY INC.
F:72M0 		$413.33K €353.55K Germany €2.68 -0.74% +0.75% 0.00
371 Israel Opportunity - Energy Resources LP
TA:ISOP-L 		$362.49K ILA135.21 Million Israel ILA118.30 +1.81% -3.98% 1.58 Million
372 Helium One Global Ltd
LSE:HE1 		$359.88K GBX2.96 Billion UK GBX0.30 -0.99% -1.96% 2.56 Billion
373 Metgasco Ltd
AU:MEL 		$337.97K AU$477.65K Australia AU$0.01 +0.00% -18.75% 967.73K
374 Challenger Energy Group PLC
LSE:CEG 		$331.01K GBX2.72 Billion UK GBX10.10 +0.00% -23.48% 18.90 Million
375 Prospex Energy PLC
LSE:PXEN 		$303.49K GBX2.49 Billion UK GBX5.75 +0.00% -1.71% 21.19 Million
376 Parkmead Group PLC
LSE:PMG 		$259.25K GBX2.13 Billion UK GBX19.50 -2.50% -4.88% 2.70 Million
377 Europa Oil & Gas Holdings
LSE:EOG 		$228.19K GBX1.88 Billion UK GBX1.43 -6.56% -10.09% 71.61 Million
378 Petro Matad Ltd
LSE:MATD 		$180.93K GBX1.49 Billion UK GBX0.80 -3.03% -3.03% 170.06 Million
379 AVILA ENERGY CORP.
F:6HQ0 		$177.76K €152.05K Germany €0.00 +214.29% +780.00% 91.00K
380 Orcadian Energy PLC
LSE:ORCA 		$141.60K GBX1.16 Billion UK GBX14.50 -1.69% -6.45% 1.30 Million
381 Mosman Oil and Gas Ltd
LSE:MSMN 		$136.82K GBX1.12 Billion UK GBX0.04 -5.13% +44.53% 3.61 Billion
382 Angus Energy PLC
LSE:ANGS 		$129.12K GBX1.06 Billion UK GBX0.24 +0.00% +0.00% 15.11 Million
383 Cadogan Petroleum plc
LSE:CAD 		$122.22K GBX1.00 Billion UK GBX4.00 +0.00% +0.00% 1.15 Million
384 Reabold Resources Plc
LSE:RBD 		$111.16K GBX913.58 Million UK GBX63.00 +0.00% -1.56% 298.09K
385 Block Energy PLC
LSE:BLOE 		$98.87K GBX812.60 Million UK GBX0.80 +0.00% +0.00% 62.43 Million
386 Deltic Energy PLC
LSE:DELT 		$90.62K GBX744.77 Million UK GBX8.00 +0.00% +6.67% 6.54 Million
387 Predator Oil & Gas Holdings Plc
LSE:PRD 		$87.66K GBX720.46 Million UK GBX0.80 -39.85% -38.46% 277.99 Million
388 Tower Resources plc
LSE:TRP 		$75.51K GBX620.60 Million UK GBX0.01 -6.45% -6.45% 11.89 Billion
389 Serinus Energy
LSE:SENX 		$59.54K GBX489.35 Million UK GBX3.30 +0.00% +0.00% 355.84K
390 Westmount Energy Limited
LSE:WTE 		$46.45K GBX381.74 Million UK GBX2.65 +0.00% +0.00% 1.80 Million
391 PTT Exploration and Production Public Company Limited
F:PTTG 		$46.10K €39.43K Germany €4.18 +0.48% +3.47% 0.00
392 Indus Gas Limited
LSE:INDI 		$42.30K GBX347.65 Million UK GBX1.90 +39.71% -22.76% 33.98 Million
393 Sound Energy PLC
LSE:SOU 		$39.03K GBX320.75 Million UK GBX1.40 +0.00% +0.00% 3.86 Million
394 Coro Energy PLC
LSE:CORO 		$37.90K GBX311.51 Million UK GBX2.90 +0.00% +1.75% 2.95 Million
395 Empire Metals Limited
LSE:GEO 		$35.07K GBX288.22 Million UK GBX0.05 +5.10% -10.43% 443.82 Million
396 Union Jack Oil plc
LSE:UJO 		$32.54K GBX267.48 Million UK GBX1.83 +4.29% +7.35% 13.63 Million
397 Empyrean Energy Plc
LSE:EME 		$26.79K GBX220.21 Million UK GBX0.04 -3.75% -4.70% 4.07 Billion
398 Petrel Resources
LSE:PET 		$20.22K GBX166.15 Million UK GBX0.80 +0.00% +0.00% 5.47 Million
399 TomCo Energy Plc
LSE:TOM 		$16.58K GBX136.23 Million UK GBX0.02 +4.65% -4.26% 1.06 Billion
400 Synergia Energy Ltd.
LSE:SYN 		$16.10K GBX132.36 Million UK GBX0.01 +0.00% -15.00% 1.00 Billion
401 Nostra Terra Oil and Gas Company PLC
LSE:NTOG 		$15.64K GBX128.56 Million UK GBX0.02 +0.00% +0.00% 15.17 Million
402 Meren Energy Inc.
TO:MER 		$14.36K CA$19.84K Canada CA$2.17 +0.46% +2.84% 9.20 Million
403 Clontarf Energy Plc
LSE:CLON 		$13.96K GBX114.71 Million UK GBX0.01 +0.00% -9.68% 256.74 Million
404 HighPeak Energy Inc
NASDAQ:HPKEW 		$485.20 $485.20 USA $0.05 +0.00% +0.00% 28.80K
405 Ascent Resources plc
LSE:AST 		$466.40 GBX3.83 Million UK GBX0.00 -99.01% -99.04% 194.17 Million
406 Pure One Corporation Limited
AU:P1E 		$218.85 AU$309.31 Australia AU$0.03 -5.63% -9.46% 11.96 Million

How Oil & Gas E&P Companies Are Ranked by Market Cap

Oil & Gas E&P companies are ranked by market cap, the latest share price multiplied by shares outstanding, with each company counted once at its primary listing.

Track real-time market capitalization of largest public companies in the Oil & Gas E&P industry. Compare marketcap, analyze stock performance, and discover leading oil & gas e&p corporations. View all industries