Antithesis Funding: $182M Raised, Series A (2025)

Antithesis funding overview

Antithesis is based in Arlington, Virginia. Antithesis has raised $182M in total disclosed funding. That places its disclosed total in the $100M–$250M range. Its most recent disclosed round is a Series A announced in December 2025. The round record for Antithesis runs through 2025; nothing later has been disclosed. Investors on record include Jane Street, Amplify Partners, Spark Capital, Tamarack Global, First In Ventures, Teamworthy Ventures and 5 others. 11 distinct backers are named across the disclosed rounds.

Antithesis at a glance

Total raised: $182M
Latest round: Series A
Latest round date: December 2025
Headquarters: Arlington, Virginia
Notable investors: Jane Street, Amplify Partners, Spark Capital, Tamarack Global, First In Ventures, Teamworthy Ventures, Hyperion Capital, Stripe

Frequently asked about Antithesis funding

How much has Antithesis raised?: Antithesis has raised $182M in total disclosed funding across the rounds on record.
Who has invested in Antithesis?: Jane Street, Amplify Partners, Spark Capital, Tamarack Global, First In Ventures, Teamworthy Ventures are named among the investors backing Antithesis.
What was the latest Antithesis funding round?: The most recent disclosed round is a Series A, announced in December 2025.
Where is Antithesis based?: Antithesis is based in Arlington, Virginia.
When did Antithesis last raise?: The last disclosed Antithesis round closed in December 2025 at Series A.

We update the Antithesis record whenever a new round is filed or announced, so the totals above track the public record rather than estimates. Related companies in Arlington and their backers are listed below.

Antithesis Funding: $182M Raised, Series A (2025)

Antithesis funding overview

Antithesis at a glance

Frequently asked about Antithesis funding

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