Summit Therapeutics Inc. number of employees

Summit Therapeutics Inc. reported 265 employees at December 31, 2025 in its latest annual report, up 106 (66.7%) on the year before. That compares with 105 at December 31, 2021.

Headcount by year

Fiscal year end	Employees	Change	Revenue per employee	Source
December 31, 2025	265	+106 (66.7%)	—	10-K, filed February 23, 2026
December 31, 2024	159	+54 (51.4%)	—	10-K, filed February 24, 2025
December 31, 2023	105	+29 (38.2%)	—	10-K, filed February 20, 2024
December 31, 2022	76	−29 (27.6%)	$9,276	10-K, filed March 9, 2023
December 31, 2021	105	—	$17,229	10-K, filed March 17, 2022

What the annual reports say

As of December 31, 2025, we had 265 total employees. 2025 annual report
As of December 31, 2024, we had 159 total employees. 2024 annual report
As of December 31, 2023, we had 105 total employees. 2023 annual report
As of December 31, 2022, we had 76 full-time employees and 77 total employees. 2022 annual report
As of December 31, 2021, we had 105 full-time employees and 110 total employees. 2021 annual report

Headcount as the company states it in Item 1 of its annual report (some count full-time equivalents or exclude part-time and temporary staff), at the date it gives. Years where the report states no clear total are left out rather than estimated. Changes can reflect acquisitions and disposals as well as hiring and job cuts.

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Figures from Summit Therapeutics Inc.'s SEC filings (10-K and 10-Q), retrieved November 1, 2026. How we read and check them: methodology and data sources. Not investment advice. Back to Summit Therapeutics Inc.