Adaptimmune Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Marketable securities - Available-for-sale debt securities - Unrealized loss position (Details)

v3.23.1

Marketable securities - Available-for-sale debt securities - Unrealized loss position (Details) $ in Thousands	Mar. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Marketable securities
Fair market value of investments in an unrealized loss position	$ 45,688	$ 90,618
Number of investments in an unrealized loss position \| security	10	19
Unrealized losses	$ (458)	$ (930)
Corporate debt securities
Marketable securities
Fair market value of investments in an unrealized loss position, 12 months or longer	$ 40,791	74,481
Fair market value of investments in an unrealized loss position, less than 12 months		$ 11,283
Number of available-for-sale securities in an unrealized loss position, 12 months or longer \| security	9	16
Number of available-for-sale securities in an unrealized loss position, less than 12 months \| security		2
Unrealized losses, 12 months or longer	$ (355)	$ (679)
Unrealized losses, less than 12 months		(97)
Agency bonds
Marketable securities
Fair market value of investments in an unrealized loss position, 12 months or longer	$ 4,897	$ 4,854
Number of available-for-sale securities in an unrealized loss position, 12 months or longer \| security	1	1
Unrealized losses, 12 months or longer	$ (103)	$ (154)

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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