Notice of Proposed Sale · 144

BancFirst Corporation

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Notice of Proposed Sale

Filed Jul 27, 2026Accepted Jul 27, 2026, 5:50 PM EDTFiling CIK 760498Accession 0001042873-26-000005

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Structured filing — 144

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer: BANCFIRST CORP /OK/
Issuer CIK: 0000760498
SEC file number: 000-14384
Phone: 4052701000
Person for whose account securities are to be sold: RAINBOLT DAVID E
Relationships to issuer: Director · 10% Stockholder
Street: 100 NORTH BROADWAY AVE
City: OKLAHOMA CITY
State / country code: OK
Postal code: 73102-8401

Securities proposed for sale

Securities proposed for sale · 1 reported row
Security	Proposed units	Aggregate market value	Units outstanding	Approximate sale date	Exchange	Broker / market maker
Common Stock	166,783	19,340,157.00	33,598,745	07/27/2026	Nasdaq Global Market	BancFirst Trust

Broker / market maker — proposed row 1, entry 1

Name: BancFirst Trust
Street: 100 N Broadway Ave
City: Oklahoma City
State / country code: OK
Postal code: 73102

Acquisition of securities to be sold

Acquisition of securities to be sold · 1 reported row
Security	Acquired	Nature of acquisition	Acquired from	Amount acquired	Gift transaction	Payment date	Nature of payment
Common Stock	02/03/2026	Shares gifted to David and Kim Rainbolt Foundation	David E. Rainbolt	166,783	N	02/03/2026	Shares were gifted to the Foundation

Sales reported in the preceding three months

Sales reported in the preceding three months · 7 reported rows
Seller	Security	Sale date	Amount sold	Gross proceeds
David E Rainbolt	Common Stock	04/23/2026	17,527	2,019,995.50
David E Rainbolt	Common Stock	04/24/2026	650	74,750.45
David E Rainbolt	Common Stock	04/27/2026	205	23,572.51
David E Rainbolt	Common Stock	04/28/2026	24,614	2,843,659.44
David E Rainbolt	Common Stock	04/29/2026	1	115.00
David E Rainbolt	Common Stock	05/06/2026	6,219	715,483.65
David E Rainbolt	Common Stock	05/07/2026	9,001	1,035,863.93

Seller — prior-sale row 1, entry 1

Name: David E Rainbolt
Street: 100 N Broadway Ave
City: Oklahoma City
State / country code: OK
Postal code: 73102

Seller — prior-sale row 2, entry 1

Name: David E Rainbolt
Street: 100 N Broadway Ave
City: Oklahoma City
State / country code: OK
Postal code: 73102

Seller — prior-sale row 3, entry 1

Name: David E Rainbolt
Street: 100 N Broadway Ave
City: Oklahoma City
State / country code: OK
Postal code: 73102

Seller — prior-sale row 4, entry 1

Name: David E Rainbolt
Street: 100 N Broadway Ave
City: Oklahoma City
State / country code: OK
Postal code: 73102

Seller — prior-sale row 5, entry 1

Name: David E Rainbolt
Street: 100 N Broadway Ave
City: Oklahoma City
State / country code: OK
Postal code: 73102

Seller — prior-sale row 6, entry 1

Name: David E Rainbolt
Street: 100 N Broadway Ave
City: Oklahoma City
State / country code: OK
Postal code: 73102

Seller — prior-sale row 7, entry 1

Name: David E Rainbolt
Street: 100 N Broadway Ave
City: Oklahoma City
State / country code: OK
Postal code: 73102

Prior-sale reporting

Nothing to report for the preceding three months: N

Remarks

The shares being sold are held in the David and Kim Rainbolt Foundation. These shares were gifted to the foundation on February 3, 2026. David votes these shares and therefore is an indirect holder of the shares for the foundation.

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