11.         Share-Based Compensation

2019 Omnibus Incentive Plan

The DiaMedica Therapeutics Inc. 2019 Omnibus Incentive Plan (2019 Plan) was adopted by the Board of Directors in March 2019 and approved by our shareholders at our annual general and special meeting of shareholders held on May 22, 2019. The 2019 Plan permits the Board, or a committee or subcommittee thereof, to grant to the Company’s eligible employees, non-employee directors and consultants non-statutory and incentive stock options, stock appreciation rights, restricted stock awards, restricted stock units, deferred stock units, performance awards, non-employee director awards and other stock-based awards. We grant options to purchase common shares under the 2019 Plan at no less than the fair market value of the underlying common shares as of the date of grant. Options granted to employees and non-employee directors have a maximum term of ten years and generally vest in approximately equal quarterly installments over one to four years. Options granted to non-employees have a maximum term of five years and generally vest in approximately equal quarterly installments over one year. Subject to adjustment as provided in the 2019 Plan, the maximum number of the Company’s common shares authorized for issuance under the 2019 Plan is 2,000,000 shares. As of September 30, 2021, options to purchase 1,468,690 common shares were outstanding and 50,326 common shares were reserved for issuance upon settlement of deferred share unit awards (DSUs) under the 2019 Plan.

Prior stock option plan

The DiaMedica Therapeutics Inc. Amended and Restated Stock Option Plan (Prior Plan) was terminated by the Board of Directors in conjunction with the shareholder approval of the 2019 Plan. Awards outstanding under the Prior Plan remain outstanding in accordance with and pursuant to the terms thereof. Options granted under the Prior Plan have terms similar to those used under the 2019 Plan. As of September 30, 2021, options to purchase 490,410 common shares were outstanding under the Prior Plan.

Prior deferred share unit plan

The DiaMedica Therapeutics Inc. Amended and Restated Deferred Share Unit Plan (DSU Plan) was terminated by the Board of Directors in conjunction with the shareholder approval of the 2019 Plan. Awards outstanding under the DSU Plan remain outstanding in accordance with and pursuant to the terms thereof. As of September 30, 2021, there were 21,183 common shares reserved for DSUs outstanding under the DSU Plan.

Share-based compensation expense for each of the periods presented is as follows (in thousands):

We recognize share-based compensation based on the fair value of each award as estimated using the Black-Scholes option valuation model. Ultimately, the actual expense recognized over the vesting period will only be for those shares that actually vest.

A summary of option activity is as follows (in thousands except share and per share amounts):

Information about stock options outstanding, vested and expected to vest as of September 30, 2021, is as follows: