The information in this prospectus is not complete and may be changed. We may not sell
these securities or accept an offer to buy these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities, and it is not soliciting offers to
buy these securities in any state where such offer or sale is not permitted.
SUBJECT TO COMPLETION, DATED DECEMBER 13, 2024
PROSPECTUS
$100,000,000
Common Stock
We have entered
into a Sales Agreement, dated October 5, 2021, as amended by that certain Amendment No. 1, dated March 30, 2022, with Goldman Sachs & Co. LLC, Wells Fargo Securities, LLC and Leerink Partners LLC, as Sales Agents, as so
amended, the Sales Agreement, relating to the sale of our common stock offered by this prospectus. In accordance with the terms of the Sales Agreement, we may offer and sell our common stock, par value $0.00001 per share, having an aggregate
offering price of up to $150,000,000, from time to time through the Sales Agents. As of December 13, 2024, we had offered and sold shares of our common stock with an aggregate offering price of $12,000,000 pursuant to the Sales Agreement and the
sales agreement prospectus, or the prior prospectus. Shares of our common stock having an aggregate offering price of up to $138,000,000 remained unsold under the Sales Agreement and the prior prospectus. Such shares will no longer be offered and
sold under the prior prospectus. This prospectus covers the offering, issuance and sale by us of shares of our common stock having an aggregate offering price of up to $100,000,000 of the $138,000,000 that remained unsold under the Sales Agreement
and the prior prospectus. If we wish to issue and sell additional shares of our common stock under the Sales Agreement in excess of the $100,000,000 being registered under this sales agreement prospectus (in an amount up to an additional
$38,000,000), we must file with the Securities and Exchange Commission one or more additional prospectus supplements to register under the Securities Act of 1933, as amended, or the Securities Act, the issuance and sale of any such additional shares
of our common stock we wish to sell from time to time under the Sales Agreement.
Our common stock is traded on the Nasdaq Global Select
Market under the symbol TSHA. On December 12, 2024, the last reported sale price of our common stock was $2.25 per share.
Subject to the terms and conditions of the Sales Agreement, the Sales Agents may sell the common stock under this prospectus by any methods
deemed to be an at the market offering as defined in Rule 415(a)(4) promulgated under the Securities Act. The Sales Agents are not required to sell any specific number or dollar amount of shares of our common stock. Each of the Sales
Agents has agreed to use its commercially reasonable efforts to sell on our behalf all of the shares of common stock requested to be sold by us, consistent with its normal trading and sales practices, on mutually agreed terms between the Sales
Agents and us. There is no arrangement for funds to be received in any escrow, trust or similar arrangement.
The Sales Agents will be
entitled to compensation under the terms of the Sales Agreement at a commission rate equal to 3.0% of the gross proceeds of any shares of common stock sold under the Sales Agreement. See Plan of Distribution for additional information
regarding compensation to be paid to the Sales Agents. In connection with the sale of common stock on our behalf, each of the Sales Agents will be deemed to be an underwriter within the meaning of the Securities Act and the compensation
of the Sales Agents will be deemed to be underwriting commissions or discounts. We have agreed to provide indemnification and contribution to the Sales Agents with respect to certain liabilities, including liabilities under the Securities Act or the
Securities Exchange Act of 1934, as amended, or the Exchange Act.
The net proceeds from any sales under this prospectus will be used as
described under the section entitled Use of Proceeds. The proceeds we receive from sales of our common stock, if any, will depend on the number of shares actually sold and the offering price of such shares.
We are an emerging growth company and smaller reporting company under the federal securities laws and, as such, are
subject to reduced public company reporting requirements. See Prospectus SummaryImplications of Being an Emerging Growth Company and Smaller Reporting Company.
Investing in our common stock involves a high degree of risk. You should review carefully the risks and uncertainties described under the
heading Risk Factors beginning on page S-6 of this prospectus and under similar headings in the other documents that are incorporated by reference into this prospectus.
NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR
DETERMINED IF THIS PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
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Goldman Sachs & Co. LLC |
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Wells Fargo Securities |
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Leerink Partners |
The date of this prospectus is , 2024.