| Jul 30, 1987 | Bank of Granite | Granite | $13.2M | Farmers&merchants Bank |
| Jul 23, 1987 | Farmers & Merchants Bank | Eufaula | $11.5M | Citizens NB&T of Muskoge |
| Jun 29, 1987 | United FS&LA | Durant | $89.8M | Midwest FS&LA of Minneapoli |
| Jun 25, 1987 | Eighty Niner Bank of Coyle | Coyle | $6.6M | Oklahoma State Bank |
| Jun 18, 1987 | Investors Federal Bank | El Reno | $97.5M | Midwest FS&LA of Minneapoli |
| Apr 9, 1987 | First National Bank of Braman | Braman | $12.2M | Community Bank |
| Mar 26, 1987 | The First State Bank in Billings | Billings | $10.2M | First NB&T Co Perry Okla |
| Mar 20, 1987 | The Madill Bank & Trust Company | Madill | $39.6M | First American National |
| Mar 17, 1987 | United Oklahoma Bank | Oklahoma City | $171.9M | United Bank of Oklahoma |
| Mar 13, 1987 | Victor S&LA | Muskogee | $601.3M | Cimarron FS&LA |
| Mar 12, 1987 | Expressway Bank | Oklahoma City | $19.1M | First Interstate BK of O |
| Mar 5, 1987 | First National Bank of Sapulpa | Sapulpa | $7.5M | American NB&T Co Sapulpa |
| Feb 13, 1987 | Universal Sa, F.A. | Chickasha | $104.6M | —
|
| Feb 12, 1987 | First City Bank of Atoka | Atoka | $11.6M | Atoka State Bank |
| Feb 11, 1987 | Community Bank | Seiling | $5.1M | First NB of Seiling |
| Jan 29, 1987 | Peoples Bank & Trust Company | Holdenville | $20.2M | Bank National Assn |
| Jan 22, 1987 | National Bank of Frederick | Frederick | $23.8M | First National Bank&trus |
| Jan 15, 1987 | The First National Bank of Skiatook | Skiatook | $14.0M | American Exchange Bank |
| Jan 15, 1987 | The First National Bank of Rush Springs | Rush Springs | $12.8M | First NB of Maysville |
| Jan 8, 1987 | The Security Nat BK & TR Co. of Norman | Norman | $198.7M | Security NB&T Co of Norm |
| Dec 5, 1986 | Cordell National Bank | Cordell | $78.6M | City NB of Weatherford |
| Nov 20, 1986 | Norman Bank of Commerce | Norman | $43.5M | First Interstate BK of O |
| Nov 14, 1986 | First National Bank of Temple | Temple | $7.3M | Union NB of Oklahoma |
| Nov 6, 1986 | The First National Bank & TR Co. | Enid | $100.1M | —
|
| Oct 23, 1986 | Stillwater Community Bank | Stillwater | $22.6M | Bank National Assn |
| Oct 10, 1986 | Homestead S&LA | Woodward | $135.0M | —
|
| Sep 10, 1986 | Central Bank & Trust of Tulsa | Tulsa | $80.1M | F&M Bank&trust Co |
| Sep 4, 1986 | Fairview State Bank of Fairview | Fairview | $24.0M | Community NB of Okarche |
| Aug 14, 1986 | Citizens National Bank & Trust Co | Oklahoma City | $179.1M | Liberty NB&T Co of Ok Ci |
| Aug 7, 1986 | The First Nat Bank & Trust Co. of El Reno | El Reno | $47.2M | American NB of Lawton |
| Jul 31, 1986 | First National Bank in Cordell | Cordell | $23.0M | —
|
| Jul 14, 1986 | The First Nat BK & TR Co. of Oklahoma | Oklahoma City | $1.75B | First Intrst BK Ok CTY N |
| May 29, 1986 | The First National BK & TR Co. of Norman | Norman | $73.2M | Liberty NB&T Co of Ok Ci |
| May 8, 1986 | Bank of Commerce & Trust Company | Tulsa | $182.7M | First NB&T Co of Tulsa |
| May 1, 1986 | The First National Bank of Carter | Carter | $7.3M | —
|
| Feb 21, 1986 | Elk City State Bank | Elk City | $22.2M | —
|
| Jan 9, 1986 | First State Bank | Cache | $20.7M | American NB of Lawton |
| Dec 5, 1985 | The Farmers and Merchants National Bank of | Hennessy | $28.7M | —
|
| Nov 21, 1985 | The Dill State Bank | Dill City | $15.5M | Home State Bank |
| Oct 18, 1985 | First State Bank | Jet | $12.3M | Cleo State Bank |
| Oct 17, 1985 | Farmers State Bank in Afton | Afton | $10.8M | Security Bank&trust Co |
| Oct 10, 1985 | Bank of Canton | Canton | $22.4M | Community State Bank of Can |
| Sep 27, 1985 | The First Nationlal Bank in Terral | Terral | $4.1M | —
|
| Aug 8, 1985 | Security Bank & Trust Company | Midwest City | $35.0M | Security Bank of MW CTY |
| Jul 11, 1985 | Crossroads State Bank | Oklahoma City | $17.8M | —
|
| Jun 21, 1985 | First City Bank, N.A. | Oklahoma City | $97.8M | City Bank&trust |
| May 16, 1985 | Bank of Newcastle | Newcastle | $32.6M | Allied Oklahoma Bank N.A. |
| Apr 4, 1985 | Bank of Hunter | Hunter | $3.0M | First NB in Tonkawa |
| Feb 7, 1985 | Farmers National Bank of Erick | Erick | $16.8M | First American Bank |
| Jan 24, 1985 | The First National Bank in Marlow | Marlow | $27.4M | First NB in Marlow |