2019 Amendment BancFirst Corporation Thrift Plan

The section of the Adoption Agreement entitled "CONTRIBUTION TYPES" is amended as follows:

[n/a]    Contributions cease. All Contributions have ceased or will cease (Plan is frozen).

[n/a]    Effective date of freeze:                                          [Note: Effective date is optional unless this is the amendment or restatement to freeze the Plan.]

[X]    Pre‑Tax Deferrals. See Section 3.02 and Elections 20‑23, and 34.

[X]    Roth Deferrals. See Section 3.02(E) and Elections 20, 21, and 23. [Note: The Employer may not limit Elective Deferrals to Roth Deferrals only.]

[X]    Matching. See Sections 1.35 and 3.03 and Elections 24‑26. [Note: The Employer may make an Operational QMAC without electing 6(c). See Section 3.03(C)(2). Do not elect for a safe harbor plan; use 6(e) instead.]

[X]    Nonelective. See Sections 1.38 and 3.04 and Elections 27-29. [Note: The Employer may make an Operational QNEC without electing 6(d). See Section 3.04(C)(2).]

[n/a]    Safe Harbor/Additional Matching. The Plan is (or pursuant to a delayed election, may be) a safe harbor 401(k) Plan. The Employer will make (or under a delayed election, may make) Safe Harbor Contributions as it elects in Election 30. The Employer may or may not make Additional Matching Contributions as it elects in Election 30. See Election 26 as to matching Catch‑Up Deferrals. See Section 3.05.

[X]    Employee (after‑tax). See Section 3.09 and Election 36.

[n/a]    SIMPLE 401(k). The Plan is a SIMPLE 401(k) Plan. See Section 3.10. [Note: The Employer electing 6(g) must elect a calendar year under 3(a) and may not elect any other Contribution Types except under Elections 6(b) and 6(h).]

[n/a]    Designated IRA. See Section 3.12 and Election 37.

The section of the Adoption Agreement entitled "ELECTIVE SERVICE CREDITING" is amended to read as follows:

[n/a]    Not applicable. No elective Predecessor Employer Service crediting applies.

[X]    Applies. The Plan credits the specified service with the following designated Predecessor Employers as Service for the Employer for the purposes indicated (Choose one or both of (1) and (2) as applicable. Complete (3). Choose (4) if applicable.):

[n/a]    All purposes. Credit as Service for all purposes, service with Predecessor Employer(s): ______________________ (insert as many names as needed).

Time period. Subject to any exceptions noted under Election 13(b)(4), the Plan credits as Service under Elections 13(b)(1) or (2) (Choose one or more of a., b., and c. as applicable.):

[n/a]    All. All service, regardless of when rendered.

[n/a]    Service after. All service, which is or was rendered after:                                          (specify date).

[X]    Service before. All service, which is or was rendered before:   the dates specified in 13(b)4   (specify date).

[X]    Describe elective Predecessor Employer Service crediting: For Employees of Union Bank of Chandler and Union National Bancshares of Chandler, Inc.. who were employed by such entities as of November 10, 2010 and continue such employment through December 31, 2010, all service with such entities is credited; For Employees of Exchange National Bank of Moore and Exchange Bancshares of Moore, who were employed by such entities as of December 31, 2010 all service with such entities is credited; For Employees of 1st Bank Oklahoma, who were employed by such entity as of January 1, 2012 and continue such service after such date, all service with such  entity is credited; For Employees of Okemah National Bank, who were employed by such entity as of October 20, 2011 and who continue employment as Employees after such date, all service with such entity is credited; For Employees of RBC Insurance Agency, Inc. ("RBCIA") persons  who were employed by such entity as of the date of the acquisition of such entity by BancFirst Corporation or its  affiliate and who remain employed by RBCIA,  BancFirst Corporation or one of its affiliates after such acquisition shall be credited with their service with RBCIA; For employees of Bank of Commerce, Yukon ("BCY") who were employed by BCY  as of October 1, 2015, all service with BCY shall be credited; For employees of First Bank & Trust Company of Wagoner and First Bank-Chandler who were employed by either entity on January 12, 2018 and remained employed with such entities after such date, service prior to January 12, 2018 shall be credited.  For Employees of Pegasus Bank who were employed by Pegasus Bank as of August 15, 2019 and who continued to be employed by Pegasus Bank through December 31, 2019, all service with Pegasus Bank is credited.

The section of the Adoption Agreement entitled "SPECIAL ELIGIBILITY EFFECTIVE DATE (DUAL ELIGIBILITY)" is amended as follows:

[n/a]    Waiver of eligibility conditions for certain Employees. For all Contribution Types, the eligibility conditions and entry dates apply solely to an Eligible Employee employed or reemployed by the Employer after                                      (specify date). If the Eligible Employee was employed or reemployed by the Employer by the specified date, the Employee will become a Participant on the latest of: (i) the Effective Date; (ii) the restated Effective Date; (iii) the Employee's Employment Commencement Date or Re‑Employment Commencement Date; or (iv) the date the Employee attains age            (not exceeding age 21).

[X]    Describe special eligibility Effective Date(s): Employees who were active participants in the 1st Bank Oklahoma 401(k) Profit Sharing Plan as of January 1, 2012 are eligible to participate in the Plan as of January 1, 2012;  Employees who were active participants in the Okemah National Bank Employees 401(k) Profit Sharing Plan as of October 20, 2011 shall be eligible to participate as of October 21, 2011. Employees of Bank of Commerce, Yukon ("BCY") who were employed by BCY as of October 1, 2015 and who were participants in the Ramey and Walsh Banking Group Employees 401(k) Profit Sharing Plan are eligible to participate in the Plan effective as of the payroll period for which payment was made as of November 13, 2015.  Employees who were active participants in the Pegasus Bank 401(k) Plan as of December 31, 2019 are eligible to participate as of January 1, 2020.

The section of the Adoption Agreement entitled "ENTRY DATE" is amended as follows:

The section of the Adoption Agreement entitled "PROSPECTIVE/RETROACTIVE ENTRY DATE" is amended as follows:

The section of the Adoption Agreement entitled "EMPLOYEE (AFTER‑TAX) CONTRIBUTIONS" is amended as follows:

[n/a]Additional limitations. The Plan permits Employee Contributions subject to the following limitations, if any, in addition to those already imposed under the Plan: __________________

[X]Apply Matching Contribution. For each Plan Year, the Employer's Matching Contribution made as to Employee Contributions is: 0                                    

The section of the Adoption Agreement entitled "IN‑SERVICE DISTRIBUTIONS/EVENTS" is amended as follows:

[n/a]    None. The Plan does not permit any In‑Service Distributions except as to any of the following (if applicable): (i) RMDs under Section 6.02; (ii) Protected Benefits; and (iii) Designated IRA Contributions. Also see Section 6.01(C)(4)(e) with regard to Rollover Contributions, Employee Contributions and DECs.

[X]    Permitted. In‑Service Distributions are permitted as follows from the designated Contribution Type Accounts (Choose one or more of (1) through (9).):

The section of the Administrative Checklist entitled "RELATED AND PARTICIPATING EMPLOYERS/MULTIPLE EMPLOYER PLAN" is amended as follows: