Table of Contents Title of each class Trading Symbol(s) Name of each exchange on which registered Ordinary shares, nominal value £0.01 per share * n/a The Nasdaq Stock Market LLC American Depositary Shares, each representing one ordinary share, nominal value £0.01 per share BCYC The Nasdaq Stock Market LLC UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly perio ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-38916 BICYCLE THERAPEUTICS PLC (Exact name of registrant as specified in its charter) England and Wales Not Applic ...

Table of Contents Title of each class Trading Symbol(s) Name of each exchange on which registered Ordinary shares, nominal value £0.01 per share * n/a The Nasdaq Stock Market LLC American Depositary Shares, each representing one ordinary share, nominal value £0.01 per share BCYC The Nasdaq Stock Market LLC UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly perio ...

Table of Contents Title of each class Trading Symbol(s) Name of each exchange on which registered Ordinary shares, nominal value £0.01 per share* n/a NASDAQ Global Select Market American Depositary Shares, each representing one ordinary share, nominal value £0.01 per share BCYC NASDAQ Global Select Market UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ...