Subsequent Events	6 Months Ended
Jun. 30, 2026
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events The Company evaluated subsequent events through August 11, 2026, the date on which these unaudited condensed consolidated financial statements were issued. Perceptive Senior Secured Notes Facility and Warrants On July 30, 2026, the Company entered into a strategic financing with Perceptive Credit Holdings V, LP (“Perceptive” or “Perceptive Advisors”), a leading global healthcare specialist investor, for the sale of notes of up to $250 million in aggregate principal amount in a five-year, interest-only senior credit facility (the “Credit Facility”), subject to certain conditions. An initial $75 million principal amount of notes has been issued by Autolus to Perceptive on July 30, 2026, and an additional $25 million in aggregate principal amount will be available at Autolus’ option for up to six months post-closing. An additional $150 million in aggregate principal amount of subsequent capital may become available in separate tranches upon achievement of certain pre-specified revenue milestones. The Credit Facility will bear interest at a rate per annum equal to the one month secured overnight financing rate (“SOFR”) (subject to a SOFR floor of 3.50%), plus 7.25%, and will be interest-only until maturity. Interest margin reductions may become available upon achievement of certain revenue milestones. At closing of the Credit Facility, the Company issued Perceptive a warrant to purchase up to 3.5 million American Depositary Receipts (ADSs), each ADS representing one ordinary share, at an exercise price of $1.9314 per ADS, equal to 125% of the 30-day VWAP immediately preceding the closing date.

Subsequent Events

6 Months Ended

Jun. 30, 2026

The Company evaluated subsequent events through August 11, 2026, the date on which these unaudited condensed consolidated financial statements were issued.

Perceptive Senior Secured Notes Facility and Warrants

On July 30, 2026, the Company entered into a strategic financing with Perceptive Credit Holdings V, LP (“Perceptive” or “Perceptive Advisors”), a leading global healthcare specialist investor, for the sale of notes of up to $250 million in aggregate principal amount in a five-year, interest-only senior credit facility (the “Credit Facility”), subject to certain conditions. An initial $75 million principal amount of notes has been issued by Autolus to Perceptive on July 30, 2026, and an additional $25 million in aggregate principal amount will be available at Autolus’ option for up to six months post-closing. An additional $150 million in aggregate principal amount of subsequent capital may become available in separate tranches upon achievement of certain pre-specified revenue milestones.

The Credit Facility will bear interest at a rate per annum equal to the one month secured overnight financing rate (“SOFR”) (subject to a SOFR floor of 3.50%), plus 7.25%, and will be interest-only until maturity. Interest margin reductions may become available upon achievement of certain revenue milestones. At closing of the Credit Facility, the Company issued Perceptive a warrant to purchase up to 3.5 million American Depositary Receipts (ADSs), each ADS representing one ordinary share, at an exercise price of $1.9314 per ADS, equal to 125% of the 30-day VWAP immediately preceding the closing date.