This data is excerpted from Banking on Climate Change: Fossil Fuel Finance Report Card 2017. Source: Rystad Energy AS, courtesy of Oil Change International. Reserves data as of the end of 2016.

Rank Company  Reserves (in millions of barrels) 
1 Suncor Energy 10,935.35
2 Canadian Natural Resources (CNRL) 6,867.53
3 Cenovus Energy 5,613.97
4 ConocoPhillips 5,520.38
5 ExxonMobil 4,844.35
6 Shell 3,670.18
7 PetroChina 3,225.71
8 Athabasca Oil Corporation 3,162.50
9 MEG Energy 2,973.10
10 OSUM 2,776.40
11 Total 2,575.16
12 Laricina Energy 2,293.82
13 Sunshine Oilsands 2,048.86
14 Imperial Oil 1,694.29
15 CNOOC 1,655.91
16 BP 1,271.27
17 Marathon Oil 1,232.01
18 Devon Energy 1,206.83
19 Husky Energy 1,110.44
20 Chevron 1,088.93
21 PTTEP 1,020.41
22 Value Creation    648.54
23 Black Pearl Resources    636.55
24 Paramount Resources    604.65
25 Teck Resources Limited    599.10
26 Connacher Oil and Gas    556.63
27 Southern Pacific Resource    505.52
28 Pengrowth Energy Corporation    297.47
29 Grizzly Oil Sands    284.86
30 KNOC    259.41
31 Japex    258.13
32 JX Nippon Oil and Gas    207.54