Aggregate Stock Subject to the Plan. Subject to adjustment as provided in Section 3(d) below, the total number of shares of Stock reserved and available for Awards under the Plan is 650,000. Any Stock issued hereunder may consist, in whole or in part, of authorized and unissued shares or treasury shares.

Subject to adjustment as provided in this Section 3, the aggregate number of shares of Stock which may be delivered under the Plan shall not exceed 12,000,000 shares.

Stock Subject to Plan. Subject to adjustment as provided in Section 13, # the maximum number of Shares that may be issued under the Plan is seventy five million (75,000,000) shares, provided that no more than seven million five hundred thousand (7,500,000) shares may be issued pursuant to Awards that are not Options, and # the maximum number of Shares with respect to which an Employee may be granted Awards under the Plan during a fiscal year is seven million five hundred thousand (7,500,000) shares. Shares issued under the Plan may, in whole or in part, be authorized but unissued Shares or Shares that shall have been, or may be, reacquired by the Company in the open market, in private transactions, or otherwise.

The maximum number of Shares that may be issued or transferred pursuant to all Options and Awards under this Plan is 700,000, of which not more than 200,000 Shares may be issued or transferred pursuant to Options and/or Awards to any one Eligible Employee during any one calendar year. Not more than 10,000 Shares may be issued or transferred pursuant to Options and/or Awards to any Director during any one calendar year. The maximum number of Shares that may be issued or transferred pursuant to Incentive Stock Options shall be 200,000. Upon a Change in Capitalization after the adoption of this Plan by the Board, the Shares shall be adjusted to the number and kind of Shares of stock or other securities existing after such Change in Capitalization.

The maximum number of Shares that may be issued under the Plan is 1,250,000 Shares, subject to adjustment pursuant to the provisions of Paragraph 10. If an Option terminates without having been exercised in whole or part, other Options may be granted covering the Shares as to which the Option was not exercised. Notwithstanding anything to the contrary contained in the Plan, the aggregate number of Shares issued to an Optionee on the exercise of Options granted under the Plan, or reserved for issuance to an Optionee on the exercise of Options granted under the Plan, may not exceed ten percent (10%) of the maximum number of Shares authorized to be issued on the exercise of Options under the Plan.

Stock Subject to the Plan. Awards that are made in the form of stock, restricted stock, stock units or other forms of stock-based awards shall be made from the aggregate number of shares authorized to be issued under the terms of the Stock Plan.

Stock Subject to the Plan. Subject to the provisions of Section 13 hereof, the shares of stock subject to Options or Stock Purchase Rights shall be Common Stock. Subject to the provisions of Section 13 hereof, the maximum aggregate number of Shares which may be issued upon exercise of such Options or Stock Purchase Rights is Twenty-Six Million Five Hundred Forty-Two Thousand Four Hundred Eighty-Three (26,542,483) Shares. Shares issued upon exercise of Options or Stock Purchase Rights may be authorized but unissued, or reacquired Common Stock. If an Option or Stock Purchase Right expires or becomes unexercisable without having been exercised in full, the unpurchased Shares which were subject thereto shall become available for future grant or sale under the Plan (unless the Plan has terminated). Shares which are delivered by the Holder or withheld by the Company upon the exercise of an Option or Stock Purchase Right under the Plan, in payment of the exercise price thereof or tax withholding thereon, may again be optioned, granted or awarded hereunder, subject to the limitations of this Section 3. If Shares of Restricted Stock are repurchased by the Company at their original purchase price, such Shares shall become available for future grant under the Plan (unless the Plan has terminated). Notwithstanding the provisions of this Section 3, no Shares may again be optioned, granted or awarded if such action would cause an Incentive Stock Option to fail to qualify as an Incentive Stock Option under Code Section 422.

Subject to such additional shares of Stock as shall be available for issuance under the Plan pursuant to Section 4.2, and subject to adjustment pursuant to Section 17, the maximum number of shares of Stock available for issuance under the Plan shall be equal to 65 million shares, plus the number of shares of Stock subject to awards outstanding under the Prior Plan as of the Effective Date which thereafter terminate by expiration, forfeiture, cancellation or otherwise without the issuance of such shares.

Stock Subject to the Plan. Subject to adjustment upon changes in capitalization of the Company as provided in Section 14, the maximum aggregate number of Shares that may be subject to Awards and sold under the Plan will be equal to # 1,000,000 Shares, plus # any Shares subject to awards granted under the Tocagen, Inc. 2009 Equity Incentive Plan, the Tocagen, Inc. 2017 Equity Incentive Plan, and the Forte Biosciences Inc. 2018 Equity Incentive Plan that, after the date of stockholder approval of the Plan, expire or otherwise terminate without having been exercised or issued in full, are tendered to or withheld by the Company for payment of an exercise price or for tax withholding obligations, or are forfeited to or repurchased by the Company due to failure to vest, with the maximum number of Shares to be added to the Plan pursuant to clause (b) equal to 1,102,341. In addition, Shares may become available for issuance under Section 3.2. The Shares may be authorized but unissued, or reacquired Common Stock.

Subject to Plan. This Agreement is subject to the terms and conditions of the Plan, and the terms of the Plan shall control to the extent not otherwise inconsistent with the provisions of this Agreement. To the extent the terms of the Plan are inconsistent with the provisions of the Agreement, this Agreement shall control. The capitalized terms used herein that are defined in the Plan shall have the same meanings assigned to them in the Plan. This Agreement is subject to any rules promulgated pursuant to the Plan by the Board or the Committee and communicated to the Participant in writing.