Athira Pharma Inc

The Effective Time, if the Reverse Stock Split is approved by stockholders and implemented by us, will be the date and time set forth in the applicable Certificate of Amendment that is filed with the Delaware Secretary of State. If the Reverse Stock Split Proposal is approved and the board of directors determines to proceed with the Reverse Stock Split, the exact timing of the filing of the applicable Certificate of Amendment will be determined by our board of directors. By approving the Reverse Stock Split Proposal, the stockholders will approve each of the four (4) amendments proposed by the board of directors. The Certificate of Amendment filed with the Secretary of State of the State of Delaware will include only that amendment determined by the board of directors to be in the best interests of the Company and its stockholders. The other three (3) proposed amendments will be abandoned pursuant to Section 242(c) of the Delaware General Corporation Law.

If, at any time prior to the filing of any Certificate of Amendment with the Delaware Secretary of State, notwithstanding stockholder approval, and without further action by the stockholders, the board of directors, in its sole discretion, determines that it is in our best interests and the best interests of our stockholders to delay the filing of the Certificate of Amendment or abandon the Reverse Stock Split Proposal, the Reverse Stock Split Proposal may be delayed or abandoned. We reserve the right to abandon any three (3) proposed amendments or the Reverse Stock Split Proposal in its entirety without further action by our stockholders at any time before the effectiveness of the filing with the Secretary of the State of Delaware of the Certificate of Amendment, even if the authority to effect the Reverse Stock Split Proposal has been approved by our stockholders at the Annual Meeting. By voting in favor of the Reverse Stock Split Proposal, you are expressly also authorizing the board of directors to delay, not to proceed with, and abandon, any three (3) proposed amendments or the Reverse Stock Split Proposal in its entirety if it should so decide, in its sole discretion.

If a Reverse Stock Split is effected, then after the Effective Time, our common stock will have a new Committee on Uniform Securities Identification Procedures (“CUSIP”) number, which is a number used to identify our equity securities, and stock certificates with the older CUSIP number will need to be exchanged for stock certificates with the new CUSIP number by following the procedures described below. After the Reverse Stock Split, we will continue to be subject to the periodic reporting and other requirements of the

Exchange Act. We currently expect that our common stock will continue to be listed on Nasdaq under the symbol “ATHA” subject to any future change of listing of our securities, although it will be considered a new listing with a new CUSIP number. The Reverse Stock Split is not intended to be, and we do not believe that it will have the effect of, a “going private transaction” covered by Rule 13e-3 under the Exchange Act.