Bicycle Therapeutics Announces Proposed $200 Million Public Offering of American Depositary Shares and Non-Voting Ordinary Shares

Bicycle Therapeutics plc (Nasdaq: BCYC), a biotechnology company pioneering a new and differentiated class of therapeutics based on its proprietary bicyclic peptide (Bicycle^®) technology, today announced that it has commenced an underwritten public offering of $200 million of American Depositary Shares ("ADSs"), each representing one ordinary share and, in lieu of ADSs to investors that so choose, non-voting ordinary shares. All of the ADSs and non-voting ordinary shares in the proposed offering will be sold by Bicycle. In connection with the offering, Bicycle intends to grant the underwriters in the offering a 30-day option to purchase up to an additional $30 million of ADSs. The proposed offering is subject to market and other conditions, and there can be no assurance as to whether or when the proposed offering may be completed, or as to the actual size or terms of the offering.

Bicycle plans to use the net proceeds from the offering to fund the continued development of its proprietary pipeline and for other research and development, as well as for general corporate purposes.

Goldman Sachs & Co. LLC, Jefferies and Leerink Partners are acting as joint book-running managers for the proposed offering.

The proposed offering is being made pursuant to a "shelf" registration statement on Form S-3ASR that was filed by Bicycle with the Securities and Exchange Commission ("SEC") and automatically became effective upon filing. A preliminary prospectus supplement and accompanying prospectus relating to and describing the terms of the offering have been filed with the SEC and are available on the SEC's website at www.sec.gov. Copies of the preliminary prospectus supplement, final prospectus supplement and accompanying prospectus, when available, may be obtained from: Goldman Sachs & Co. LLC, Attention: Prospectus Department, 200 West Street, New York, New York 10282, telephone: 1-866-471-2526, or by email at [email protected]; Jefferies LLC, Attention: Equity Syndicate Prospectus Department, 520 Madison Avenue, New York, New York 10022, or by email at [email protected]; or SVB Securities LLC, Attention: Syndicate Department, 53 State Street, 40th Floor, Boston, Massachusetts 02109, by telephone at (800) 808-7525, ext. 6105, or by email at [email protected].

This press release shall not constitute an offer to sell, or a solicitation of an offer to buy, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

Forward-Looking Statements

This press release contains forward?looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Words such as "may," "will," "expect," "plan," "anticipate," "estimate," "intend" and similar expressions (as well as other words or expressions referencing future events, conditions or circumstances) are intended to identify forward-looking statements. Certain statements contained in this press release, including those relating to the timing and completion of the offering, the anticipated total gross proceeds from the offering and the planned use of proceeds of the offering are forward?looking statements that involve a number of risks and uncertainties that could cause actual results to differ materially from those in the forward?looking statements. These risks and uncertainties include, but are not limited to, risks and uncertainties associated with the consummation of the proposed offering, the completion of the offering on the anticipated terms or at all, uncertainties related to market conditions, the satisfaction of customary closing conditions related to the proposed offering and general economic conditions. Other factors that may cause actual results to differ from those expressed or implied in the forward-looking statements in this press release are discussed in Bicycle's filings with the SEC, including under the heading "Risk Factors" contained therein, as well as the risks identified in the registration statement and the preliminary prospectus supplement relating to the offering to be filed with the SEC, which are available at www.sec.gov. The forward?looking statements in this press release speak only as of the date of this document. Except as required by law, Bicycle assumes no obligation to update any forward-looking statements contained herein to reflect any change in expectations, even as new information becomes available. Bicycle's business is subject to substantial risks and uncertainties, including those referenced above. Investors, potential investors, and others should give careful consideration to these risks and uncertainties.