RANKING · Q2 2026

Largest net interest margin improvement in Oklahoma

131 of 171 banks in Oklahoma that filed for the quarter ended June 30, 2026 are ranked. At least $100 million in total assets and a comparable quarter a year earlier. Institutions with equal values share a rank. Source: FDIC quarterly financial data.

Largest net interest margin improvement in Oklahoma, Q2 2026
Rank	Institution	Headquarters	Net interest margin, change over 12 months	Total assets
1	High Plains Bank	Okeene, OK	+165 bps	$330 million
2	Cleo State Bank	Cleo Springs, OK	+78 bps	$123 million
3	The Bank, National Association	Mcalester, OK	+63 bps	$488 million
4	Fnb Community Bank	Midwest City, OK	+59 bps	$480 million
5	Local Bank	Hulbert, OK	+59 bps	$463 million
6	First National Bank	Heavener, OK	+56 bps	$113 million
7	First National Bank & Trust Company of Mcalester	Mcalester, OK	+53 bps	$580 million
8	First Fidelity Bank	Oklahoma City, OK	+52 bps	$3.0 billion
9	Grand Bank	Tulsa, OK	+50 bps	$713 million
10	Welch State Bank of Welch, Okla.	Welch, OK	+49 bps	$450 million
11	The Idabel National Bank	Idabel, OK	+48 bps	$242 million
12	Corebank	Waynoka, OK	+45 bps	$122 million
13	Bank of Commerce	Duncan, OK	+45 bps	$334 million
14	Vast Bank N.A.	Tulsa, OK	+45 bps	$540 million
15	Valor Bank	Edmond, OK	+43 bps	$303 million
16	First Bethany Bank & Trust	Bethany, OK	+43 bps	$317 million
17	Shamrock Bank N.A.	Coalgate, OK	+43 bps	$501 million
18	Security State Bank	Cheyenne, OK	+42 bps	$280 million
19	All America Bank	Oklahoma City, OK	+39 bps	$611 million
20	Old Glory Bank	Elmore City, OK	+38 bps	$277 million
21	Carson Community Bank	Stilwell, OK	+37 bps	$167 million
22	Exchange Bank and Trust Company	Perry, OK	+37 bps	$429 million
23	The Security National Bank of Enid	Enid, OK	+36 bps	$400 million
24	The Peoples National Bank of Checotah	Checotah, OK	+34 bps	$172 million
25	Patrons Bank N.A.	Okmulgee, OK	+34 bps	$314 million
26	The Farmers and Merchants National Bank of Fairview	Fairview, OK	+33 bps	$119 million
27	The Farmers State Bank	Quinton, OK	+33 bps	$194 million
28	Panhandle First Bank	Guymon, OK	+33 bps	$569 million
29	Regent Bank	Tulsa, OK	+31 bps	$2.2 billion
30	Rcb Bank	Claremore, OK	+31 bps	$4.0 billion
31	American Nation Bank	Ardmore, OK	+31 bps	$691 million
32	Armstrong Bank	Muskogee, OK	+30 bps	$2.8 billion
33	Cowboy Bank	Kremlin, OK	+30 bps	$350 million
34	Mabrey Bank	Bixby, OK	+29 bps	$2.0 billion
35	Frazer Bank	Altus, OK	+27 bps	$354 million
36	Fnb Coweta	Coweta, OK	+26 bps	$128 million
37	Cattlemens Bank	Altus, OK	+24 bps	$595 million
38	Midfirst Bank	Oklahoma City, OK	+24 bps	$42.8 billion
39	First Liberty Bank	Oklahoma City, OK	+24 bps	$885 million
40	The Stock Exchange Bank	Woodward, OK	+23 bps	$310 million
41	The Community State Bank	Poteau, OK	+23 bps	$393 million
42	First National Bank and Trust Company of Ardmore	Ardmore, OK	+23 bps	$687 million
43	Ynb	Yukon, OK	+22 bps	$261 million
44	The First National Bank and Trust Company of Broken Arrow	Broken Arrow, OK	+21 bps	$269 million
45	Security State Bank of Oklahoma	Wewoka, OK	+20 bps	$388 million
46	First Oklahoma Bank	Jenks, OK	+20 bps	$1.3 billion
47	The City National Bank and Trust Company of Lawton, Oklahoma	Lawton, OK	+20 bps	$446 million
48	The Pauls Valley National Bank	Pauls Valley, OK	+20 bps	$357 million
49	First United Bank and Trust Company	Durant, OK	+19 bps	$16.6 billion
50	First State Bank	Anadarko, OK	+19 bps	$140 million
51	The First National Bank and Trust Company, Chickasha, Oklahoma	Chickasha, OK	+19 bps	$1.1 billion
52	First Bank & Trust Company	Duncan, OK	+19 bps	$952 million
53	Great Nations Bank	Norman, OK	+19 bps	$114 million
54	Ameristate Bank	Atoka, OK	+19 bps	$478 million
55	First Texoma National Bank	Durant, OK	+19 bps	$225 million
56	The Seiling State Bank	Seiling, OK	+19 bps	$195 million
57	The Bank of Beaver City	Beaver, OK	+18 bps	$189 million
58	Kirkpatrick Bank	Edmond, OK	+18 bps	$1.0 billion
59	The Payne County Bank	Perkins, OK	+17 bps	$313 million
60	Security Bank and Trust Company	Miami, OK	+15 bps	$167 million
61	Citizens Bank & Trust Company of Ardmore	Ardmore, OK	+15 bps	$319 million
62	Oklahoma Bank and Trust Company	Clinton, OK	+13 bps	$202 million
63	The State Bank of Wynnewood	Wynnewood, OK	+13 bps	$111 million
64	Liberty National Bank	Lawton, OK	+12 bps	$1.3 billion
65	Bancfirst	Oklahoma City, OK	+8 bps	$12.8 billion
66	Security Bank	Tulsa, OK	+7 bps	$939 million
67	First National Bank of Oklahoma	Oklahoma City, OK	+6 bps	$950 million
68	American Heritage Bank	Sapulpa, OK	+6 bps	$1.5 billion
69	First National Bank & Trust, Elk City, Oklahoma	Elk City, OK	+6 bps	$294 million
70	Watermark Bank	Oklahoma City, OK	+6 bps	$451 million
71	Anchor D Bank	Texhoma, OK	+5 bps	$405 million
72	Spiritbank	Tulsa, OK	+5 bps	$913 million
73	First Bank & Trust Company	Perry, OK	+5 bps	$255 million
74	Method Bank	Wyandotte, OK	+4 bps	$241 million
75	The Citizens Bank of Edmond	Edmond, OK	+3 bps	$432 million
76	Bokf N.A.	Tulsa, OK	+3 bps	$53.0 billion
77	First Pryority Bank	Pryor, OK	0 bps	$558 million
78	Fsnb N.A.	Lawton, OK	0 bps	$478 million
79	International Bank of Commerce	Oklahoma City, OK	-1 bps	$1.6 billion
80	Bank of Grand Lake	Grove, OK	-1 bps	$249 million
81	Great Plains National Bank	Elk City, OK	-2 bps	$1.9 billion
82	American Exchange Bank	Henryetta, OK	-5 bps	$104 million
83	Sooner State Bank	Tuttle, OK	-6 bps	$355 million
84	F & M Bank	Edmond, OK	-6 bps	$915 million
85	Oklahoma Capital Bank	Tulsa, OK	-7 bps	$196 million
86	Mcclain Bank	Purcell, OK	-7 bps	$294 million
87	Citizens Bank of Ada	Ada, OK	-7 bps	$354 million
88	Gateway First Bank	Jenks, OK	-7 bps	$2.1 billion
89	Vision Bank	Ada, OK	-8 bps	$1,000 million
90	First State Bank	Valliant, OK	-8 bps	$100 million
91	First Bank of Owasso	Owasso, OK	-8 bps	$639 million
92	Triad Bank N.A.	Tulsa, OK	-8 bps	$229 million
93	The Farmers Bank	Carnegie, OK	-9 bps	$140 million
94	Grand Savings Bank	Grove, OK	-9 bps	$1.0 billion
95	The Exchange Bank	Skiatook, OK	-11 bps	$158 million
96	Frontier State Bank	Oklahoma City, OK	-11 bps	$609 million
97	Firstbank	Antlers, OK	-11 bps	$684 million
98	Blue Sky Bank	Pawhuska, OK	-13 bps	$1.4 billion
99	Sovereign Bank	Shawnee, OK	-13 bps	$1.5 billion
100	Quail Creek Bank	Oklahoma City, OK	-17 bps	$831 million

Rankings sort one published measure; they are not an overall judgment of any institution. Methodology · All rankings