Stocks › O

US Stocks Starting With O

All 101 US-listed companies beginning with O that QuantLogix tracks, ranked by market capitalisation. Every name carries a live 5-factor signal, forecast context and fundamentals.

Universe as of 2026-09-21. Research, not investment advice.

#TickerNameMarket cap
1ORCLOracle Corp$446.3B
2ORLYO'Reilly Automotive, Inc.$68.5B
3OKEOneok, Inc.$58.9B
4OXYOccidental Petroleum Corporation$58.8B
5ORealty Income Corporation$53.6B
6ONCBeOne Medicines Ltd. American Depositary Shares$39.7B
7ODFLOld Dominion Freight Line$35.9B
8OKTAOkta, Inc. Class A Common Stock$31.9B
9ONON Semiconductor Corp$27.2B
10OTISOtis Worldwide Corporation$26.1B
11OMCOmnicom Group Inc.$21.0B
12OVVOvintiv Inc.$17.3B
13OHIOmega Healthcare Investors Inc.$14.1B
14ONTOOnto Innovation Inc.$12.9B
15OSCROscar Health, Inc.$9.9B
16OCOwens Corning$9.8B
17ONBOld National Bancorp$9.7B
18ORIOld Republic International Corporation$9.6B
19OGEOGE Energy Corp.$9.4B
20ONONOn Holding AG$9.1B
21OSKOshkosh Corp.$9.1B
22OKLOOklo Inc.$7.1B
23OMFOneMain Holdings, Inc.$7.0B
24OROR Royalties Inc.$6.9B
25OWLBlue Owl Capital Inc.$6.7B
26OGCOceanaGold Corporation$6.3B
27ORKAOruka Therapeutics, Inc. Common Stock$6.3B
28ORAOrmat Technologies, Inc.$6.0B
29OBDCBlue Owl Capital Corporation$5.5B
30OTEXOpen Text Corp$5.5B
31OZKBank OZK$5.2B
32OCTVOctave Intelligence plc Class B Ordinary Shares$5.1B
33OUTOUTFRONT Media Inc.$4.9B
34OTFBlue Owl Technology Finance Corp.$4.9B
35OGSONE GAS, INC.$4.7B
36OMABGrupo Aeroportuario del Centro Norte S.A.B. de C.V$4.7B
37OIIOceaneering International Inc.$4.6B
38OLLIOllie's Bargain Outlet Holdings, Inc. Common Stock$4.5B
39ONDSOndas Inc. Common Stock$4.3B
40OPLNOPENLANE, Inc$4.2B
41OTTROtter Tail Corp$3.7B
42OPCHOption Care Health, Inc. Common Stock$3.6B
43OLEDUniversal Display Corp$3.6B
44OGNOrganon & Co.$3.6B
45OSISOSI Systems Inc$3.2B
46OUSTOuster, Inc.$2.5B
47OPENOpendoor Technologies Inc Common Stock$2.5B
48OSWOneSpaWorld Holdings Limited Common Shares$2.2B
49OFGOFG BANCORP$2.2B
50OCULOcular Therapeutix, Inc.$2.2B
51OLNOlin Corp.$1.9B
52OCFCOceanFirst Financial Corp$1.7B
53OBKOrigin Bancorp, Inc.$1.7B
54OPRAOpera Limited American Depositary Shares$1.6B
55OMCLOmnicell Inc$1.5B
56ORICOric Pharmaceuticals, Inc. Common Stock$1.3B
57OMEROmeros Corporation$1.3B
58ODCOil-Dri Corporation of America$1.3B
59OSBCOld Second Bancorp Inc$1.3B
60OMDAOmada Health, Inc. Common Stock$1.3B
61OPKOpko Health Inc.$1.2B
62OPYOppenheimer Holdings, Inc.$1.2B
63ORCOrchid Island Capital, Inc.$1.2B
64ODTXOdyssey Therapeutics, Inc. Common Stock$1.2B
65OBXObsidian Therapeutics, Inc. Common Stock$1.1B
66OCSLOaktree Specialty Lending Corporation$1.1B
67OIO-I Glass, Inc.$933M
68OXLCOxford Lane Capital Corp.$891M
69OLMAOlema Pharmaceuticals, Inc. Common Stock$859M
70ODDODDITY Tech Ltd. Class A Ordinary Shares$835M
71OGGOsisko Gold Group Inc.$832M
72ORRFOrrstown Financial Services Inc$827M
73OFRMOnce Upon a Farm, PBC$695M
74OIOOIO Group Ordinary Shares$682M
75OABIOmniAb, Inc. Common Stock$650M
76OSPNOneSpan Inc. Common Stock$645M
77ONTOnterris, Inc.$636M
78OOMAOoma, Inc. Common Stock$627M
79OCSOculis Holding AG Ordinary shares$563M
80OPFIOppFi Inc.$556M
81OVIDOvid Therapeutics Inc. Common Stock$525M
82OBTOrange County Bancorp, Inc. Common Stock$516M
83OISOIL STATES INTERNATIONAL, INC.$507M
84OLPOne Liberty Properties, Inc.$500M
85OWLSOBOOK Holdings Inc. Class A Common Shares$486M
86ORBSEightco Holdings Inc. Common Stock$447M
87OXMOxford Industries, Inc.$426M
88OPTUOptimum Communications, Inc.$412M
89OSPROsprey Acquisition Corp. III Class A Ordinary Shares$403M
90OTLYOatly Group AB American Depositary Shares$399M
91OPIOffice Properties Income Trust Common shares of beneficial interest$387M
92OPRTOportun Financial Corporation Common Stock$375M
93OIMOneIM Acquisition Corp. Class A Ordinary Shares$367M
94ORNOrion Group Holdings, Inc$366M
95OBIOOrchestra BioMed Holdings, Inc. Ordinary Shares$365M
96OCGNOcugen, Inc. Common Stock$359M
97OFIXOrthofix Medical Inc. Common Stock (DE)$355M
98OYSEOyster Enterprises II Acquisition Corp Class A Ordinary Shares$352M
99OBAOxley Bridge Acquisition Limited Class A Ordinary Shares$327M
100OECOrion S.A.$324M
101OTGAOTG Acquisition Corp. I Class A Ordinary Share$303M

Jump to another letter above, or return to the full stocks directory.